Heat dynamic balance control method and system for waste gas treatment

Abstract

The invention provides a heat dynamic balance control method and system for waste gas treatment, and the method is applied to a heat dynamic balance controller in the heat dynamic balance control system for waste gas treatment. The system further comprises a fuel gas input pipeline, an oxygen input pipeline, a waste gas input pipeline, a waste gas combustion treatment unit, a cooling unit and a tail gas emission unit. The fuel gas input pipeline and the oxygen input pipeline are communicated with a burner in the waste gas combustion treatment unit; the burner and the waste gas input pipeline are communicated with a combustion cavity in the waste gas combustion treatment unit; the cooling unit is communicated with the combustion cavity and the tail gas emission unit; the method comprises the steps of determining a master variable and a slave variable in a combustion reaction process based on a target task of heat dynamic balance; according to the target value of the master variable and the heat dynamic balance expression, determining an adjustment value of the slave variable; during the combustion reaction, the slave variable is adjusted based on the adjustment value. Through the method, the utilization rate of heat generated in the waste gas treatment process is increased.

Description

Technical Field

[0001] The present application relates to the technical field of waste gas treatment, and in particular to a method and system for controlling the dynamic heat balance of waste gas treatment. Background Art

[0002] In the process of industrial production, waste gas treatment is a key link to ensure environmental protection and sustainable development of enterprises. In order to improve the utilization rate of waste gas, at present, when treating waste gas, the waste gas is usually burned, and then the heat released by the combustion of the waste gas is collected through cooling water, as well as the heat of the waste gas itself, and finally the tail gas is discharged.

[0003] In actual application, if the heat released by the combustion of exhaust gas is too much and the cooling water inflow is too little, the released heat will not be properly absorbed, resulting in the temperature of the exhaust gas being too high, posing a safety risk. Summary of the invention

[0004] In view of this, the purpose of the present application is to provide a method and system for dynamically balancing heat in waste gas treatment to improve the utilization rate of heat generated during the waste gas treatment process.

[0005] In a first aspect, an embodiment of the present application provides a method for controlling a heat dynamic balance of waste gas treatment, which is applied to a heat dynamic balance controller in a heat dynamic balance control system for waste gas treatment; the heat dynamic balance control system for waste gas treatment comprises: a gas input pipeline, an oxygen input pipeline, a waste gas input pipeline, a waste gas combustion treatment unit, a cooling unit, a tail gas emission unit and the heat dynamic balance controller; the gas input pipeline and the oxygen input pipeline are both connected to a burner in the waste gas combustion treatment unit; the burner and the waste gas input pipeline are both connected to a combustion chamber in the waste gas combustion treatment unit; the cooling unit is respectively connected to the combustion chamber and the tail gas emission unit;

[0006] The burner is used to spray the gas in the gas input pipeline and the oxygen in the oxygen input pipeline into the combustion chamber, so as to assist the combustion of the exhaust gas flowing from the exhaust gas input pipeline into the combustion chamber in the combustion chamber; the cooling unit is used to absorb the heat released during the combustion of the exhaust gas and the heat of the gas itself in the combustion chamber through cooling water; the exhaust gas discharge unit is used to discharge the exhaust gas formed by the combustion reaction from the combustion chamber;

[0007] The method comprises:

[0008] Based on the target task of heat dynamic balance, determine the main and subordinate variables in the combustion reaction process;

[0009] Determining the adjustment value of the slave variable according to the target value of the master variable and the heat dynamic balance expression;

[0010] During the combustion reaction, the slave variable is adjusted based on the adjustment value.

[0011] In combination with the first aspect, the embodiment of the present application provides a first possible implementation of the first aspect, wherein the fuel gas input pipeline is provided with a first temperature controller and a first gas flow controller; the oxygen input pipeline is provided with a second temperature controller and a second gas flow controller; the exhaust gas input pipeline is provided with a third temperature controller and a gas flow meter;

[0012] The cooling unit comprises a water tank, a water inlet pipeline, and a water outlet pipeline; the water inlet pipeline and the water outlet pipeline are both connected to the water tank; the water inlet pipeline is provided with an inlet water temperature controller and an inlet water flow controller; the water outlet pipeline is provided with an outlet water temperature controller and an outlet water flow controller;

[0013] The combustion chamber is communicated with the water tank, and the water tank is located below the combustion chamber; a first spray device is provided on the inner wall of the combustion chamber close to the water tank; the first spray device is used to absorb cooling water in the water tank and spray cooling water into the combustion chamber, so as to absorb the heat released during the combustion of the exhaust gas and the heat of the gas in the combustion chamber through the sprayed cooling water; the water tank is used to collect the cooling water sprayed by the first spray device;

[0014] The exhaust gas emission unit includes an exhaust gas emission pipeline and a water-cooled spray tower; a gas temperature monitor is arranged on the exhaust gas emission pipeline; the water-cooled spray tower is communicated with the exhaust gas emission pipeline and the water tank respectively, and the water tank is located below the water-cooled spray tower; the combustion chamber is communicated with the water-cooled spray tower through the water tank, and the exhaust gas in the combustion chamber flows into the water-cooled spray tower through the water tank and is discharged from the exhaust gas emission pipeline;

[0015] A second spray device is arranged on the inner wall of the water-cooled spray tower close to the water tank; the second spray device is used to absorb cooling water in the water tank and spray cooling water into the water-cooled spray tower to absorb heat in the exhaust gas through the sprayed cooling water.

[0016] In combination with the first possible implementation of the first aspect, the embodiment of the present application provides a second possible implementation of the first aspect, wherein the heat dynamic balance expression is:

[0017] Q 输入 +Q 烧嘴 +Q 反应热 =Q 输出 +Q冷却 +Q 损失

[0018] Among them, Q 输入 Indicates the heat carried by the gas entering the combustion chamber; Q 烧嘴 Indicates the heat generated by the burner during operation; Q 反应热 represents the heat released by the combustion of gas in the combustion chamber; Q 输出 represents the heat carried by the exhaust gas discharged by the exhaust gas emission unit; Q 冷却 Indicates the heat absorbed by cooling water; Q 损失 Indicates the amount of heat lost;

[0019] The heat carried by the gas entering the combustion chamber is calculated by the following input gas heat expression:

[0020] Q 输入 =C 氧 m 氧 t 氧 +C 燃 m 燃 t 燃 +C 废 m 废 t 废

[0021] Among them, C 氧 represents the specific heat capacity of oxygen; m 氧 represents the mass of oxygen entering the combustion chamber; t 氧 represents the temperature of the oxygen entering the combustion chamber; C 燃 Indicates the specific heat capacity of the gas; m 燃 Indicates the mass of the gas entering the combustion chamber; t 燃 Indicates the temperature of the gas entering the combustion chamber; C 废 Indicates the specific heat capacity of the exhaust gas; m 废 represents the mass of the exhaust gas entering the combustion chamber; t 废 represents the temperature of the exhaust gas entering the combustion chamber;

[0022] The heat generated by the burner during operation is calculated using the conversion formula between kilowatts and joules and the operating power of the burner;

[0023] The heat released by the combustion of the gas in the combustion chamber is calculated by the following reaction heat expression:

[0024] Q 反应热 =m 废 q 废 +m 燃 q 燃 +m 氧q 氧

[0025] Or, Q 反应热 =m 废 ΔH 废 +m 燃 ΔH 燃 +m 氧 ΔH 氧

[0026] Among them, m 废 Indicates the mass of the exhaust gas from combustion; m 燃 Indicates the mass of the gas burned; m 氧 Indicates the mass of oxygen burned; q 废 Indicates the calorific value of the exhaust gas from combustion; q 燃 Indicates the calorific value of the burning gas; q 氧 Indicates the calorific value of the oxygen being burned; ΔH 废 Indicates the heat of combustion or enthalpy change of the exhaust gas; ΔH 燃 Indicates the heat of combustion or enthalpy change of the burning gas; ΔH 氧 It represents the heat of combustion or enthalpy change of the burning oxygen;

[0027] The heat carried by the tail gas discharged by the tail gas discharge unit is calculated by the following output gas heat expression:

[0028]

[0029] Where n represents the number of types of gases contained in the exhaust gas; C 尾 Indicates the specific heat capacity of the exhaust gas; m 尾 Indicates the mass of exhaust gas; t 尾 Indicates the temperature of the exhaust gas;

[0030] The heat absorbed by the cooling water is calculated using the following cooling water expression:

[0031] Q 冷却 =C 冷 m 冷 Δt 冷

[0032] Among them, C 冷 Represents the specific heat capacity of cooling water; m 冷 Indicates the mass of cooling water flowing into the water tank; Δt 冷 represents the temperature difference between the temperature of the cooling water entering the water tank and the temperature of the cooling water flowing out of the water tank;

[0033] The heat loss is calculated using the following loss expression:

[0034] Q 损失 =A腔 a r腔 (t w腔 -t a腔 )τ+A 塔 a r塔 (t w塔 -t a塔 )τ

[0035] Among them, A 腔 represents the surface area of ​​the inner wall of the combustion chamber; a r腔 represents the combined heat transfer coefficient of the combustion chamber inner wall to the air; t w腔 represents the inner wall temperature of the combustion chamber; t a腔 represents the temperature of the environment in which the combustion chamber is located; τ represents the time of the combustion reaction; A 塔 represents the surface area of ​​the inner wall of the water-cooled spray tower; a r塔 represents the combined heat transfer coefficient of the inner wall of the water-cooled spray tower to the air; t w塔 represents the inner wall temperature of the water-cooled spray tower; t a塔 Indicates the temperature of the environment in which the water-cooled spray tower is located.

[0036] In combination with the second possible implementation of the first aspect, the embodiment of the present application provides a third possible implementation of the first aspect, wherein the target task based on the dynamic balance of heat determines the main variable and the subordinate variable in the combustion reaction process, including:

[0037] When the goal of the dynamic balance of heat is to adjust the cooling water inflow and cooling water outflow temperature so that the exhaust gas inflow, exhaust gas temperature, fuel gas inflow, fuel gas temperature, oxygen inflow, oxygen temperature, cooling water inflow temperature, exhaust gas exhaust temperature, and exhaust gas exhaust flow rate reach the target values, the exhaust gas inflow, exhaust gas temperature, fuel gas inflow, fuel gas temperature, oxygen inflow, oxygen temperature, cooling water inflow temperature, exhaust gas exhaust temperature, and exhaust gas exhaust flow rate are determined as the main variables, and the cooling water inflow and cooling water outflow temperature are determined as the dependent variables;

[0038] Determining the adjustment value of the slave variable according to the target value of the master variable and the heat dynamic balance expression includes:

[0039] According to the target value of the exhaust gas inflow, the target value of the fuel gas inflow, the target value of the oxygen inflow, and the target value of the exhaust gas discharge flow rate, the target value of the exhaust gas quality, the target value of the fuel gas quality, the target value of the oxygen quality, and the target value of the exhaust gas discharge quality are determined respectively;

[0040] Inputting the target value of exhaust gas quality, the target value of fuel gas quality, the target value of oxygen quality, the target value of exhaust gas temperature, the target value of fuel gas temperature, and the target value of oxygen temperature into the input gas heat expression, and calculating the first gas heat value of the heat carried by the gas itself entering the combustion chamber;

[0041] Inputting the target value of the exhaust gas quality, the target value of the fuel gas quality, and the target value of the oxygen quality into the reaction heat expression, and calculating the first released heat value of the heat released by the combustion of the gas in the combustion chamber;

[0042] Inputting a target value of the exhaust gas exhaust temperature and a target value of the exhaust gas exhaust quality into the gas heat expression to calculate a first exhaust gas heat value of the heat carried by the exhaust gas discharged by the exhaust gas emission unit;

[0043] A first lost heat value of the lost heat is calculated by the loss expression, and a first burner heat value of the heat generated by the burner during operation is calculated by a conversion formula between kilowatts and joules and the working power of the burner;

[0044] Inputting the first gas calorific value, the first released calorific value, the first lost calorific value, the first burner calorific value and the first tail gas calorific value into the heat dynamic balance expression to calculate the first absorbed calorific value of the heat absorbed by the cooling water;

[0045] The first absorbed heat value and the target value of the cooling water inlet temperature are input into the cooling water expression, the adjustment values ​​of the cooling water quality and the cooling water outflow temperature are calculated, and the adjustment value of the cooling water inflow amount is determined according to the adjustment value of the cooling water quality.

[0046] In combination with the second possible implementation of the first aspect, the embodiment of the present application provides a fourth possible implementation of the first aspect, wherein the target task based on the dynamic heat balance determines the main variable and the subordinate variable in the combustion reaction process, including:

[0047] When the goal of the dynamic balance of heat is to adjust the exhaust gas discharge temperature and the cooling water inflow so that the exhaust gas inflow, exhaust gas temperature, fuel gas inflow, fuel gas temperature, oxygen inflow, oxygen temperature, cooling water inflow temperature, cooling water outflow temperature, and exhaust gas discharge flow rate reach the target values, the exhaust gas inflow, exhaust gas temperature, fuel gas inflow, fuel gas temperature, oxygen inflow, oxygen temperature, cooling water inflow temperature, cooling water outflow temperature, and exhaust gas discharge flow rate are determined as the main variables, and the exhaust gas discharge temperature and cooling water inflow are determined as the slave variables;

[0048] Determining the adjustment value of the slave variable according to the target value of the master variable and the heat dynamic balance expression includes:

[0049] According to the target value of the exhaust gas inflow, the target value of the fuel gas inflow, the target value of the oxygen inflow, and the target value of the exhaust gas discharge flow rate, the target value of the exhaust gas quality, the target value of the fuel gas quality, the target value of the oxygen quality, and the target value of the exhaust gas discharge quality are determined respectively;

[0050] Inputting the target value of exhaust gas quality, the target value of fuel gas quality, the target value of oxygen quality, the target value of exhaust gas temperature, the target value of fuel gas temperature, and the target value of oxygen temperature into the input gas heat expression, and calculating the second gas heat value of the heat carried by the gas itself entering the combustion chamber;

[0051] Inputting the target value of the exhaust gas quality, the target value of the fuel gas quality, and the target value of the oxygen quality into the reaction heat expression to calculate a second released heat value of the heat released by the combustion of the gas in the combustion chamber;

[0052] A second lost heat value of the lost heat is calculated by the loss expression, and a second burner heat value of the heat generated by the burner during operation is calculated by a conversion formula between kilowatts and joules and the working power of the burner;

[0053] Input the second gas calorific value, the second released calorific value, the second lost calorific value and the second burner calorific value into the heat dynamic balance expression, and calculate the sum of the second tail gas calorific value of the heat carried by the tail gas discharged by the tail gas discharge unit and the second absorbed calorific value of the heat absorbed by the cooling water;

[0054] According to the output gas heat expression, the cooling water expression, the sum of the second exhaust gas heat value and the second absorbed heat value, the target value of the exhaust gas discharge quality, the target value of the cooling water inflow temperature, and the target value of the cooling water outflow temperature, the adjustment values ​​of the exhaust gas discharge temperature and the cooling water inflow quality are calculated, and the adjustment value of the cooling water inflow amount is calculated according to the adjustment value of the cooling water inflow quality.

[0055] In combination with the second possible implementation of the first aspect, the embodiment of the present application provides a fifth possible implementation of the first aspect, wherein the target task based on the dynamic balance of heat determines the main variable and the subordinate variable in the combustion reaction process, including:

[0056] When the goal of the dynamic balance of heat is to adjust the exhaust gas discharge temperature and the cooling water outflow temperature so that the exhaust gas inflow, exhaust gas temperature, fuel gas inflow, fuel gas temperature, oxygen inflow, oxygen temperature, cooling water inflow temperature, cooling water inflow, and exhaust gas discharge flow rate reach the target values, the exhaust gas inflow, exhaust gas temperature, fuel gas inflow, fuel gas temperature, oxygen inflow, oxygen temperature, cooling water inflow temperature, cooling water inflow, and exhaust gas discharge flow rate are determined as the main variables, and the exhaust gas discharge temperature and the cooling water outflow temperature are determined as the dependent variables;

[0057] Determining the adjustment value of the slave variable according to the target value of the master variable and the heat dynamic balance expression includes:

[0058] According to the target value of the exhaust gas inflow, the target value of the fuel gas inflow, the target value of the oxygen inflow, the target value of the exhaust gas discharge flow rate, and the target value of the cooling water inflow, the target value of the exhaust gas quality, the target value of the fuel gas quality, the target value of the oxygen quality, the target value of the exhaust gas discharge quality, and the target value of the cooling water inflow quality are determined respectively;

[0059] Inputting the target value of exhaust gas quality, the target value of fuel gas quality, the target value of oxygen quality, the target value of exhaust gas temperature, the target value of fuel gas temperature, and the target value of oxygen temperature into the input gas heat expression, and calculating the third gas heat value of the heat carried by the gas itself entering the combustion chamber;

[0060] Inputting the target value of the exhaust gas quality, the target value of the fuel gas quality, and the target value of the oxygen quality into the reaction heat expression, and calculating the third released heat value of the heat released by the combustion of the gas in the combustion chamber;

[0061] A third lost heat value of the lost heat is calculated by the loss expression, and a third burner heat value of the heat generated by the burner during operation is calculated by a conversion formula between kilowatts and joules and the working power of the burner;

[0062] Input the third gas calorific value, the third released calorific value, the third lost calorific value and the third burner calorific value into the heat dynamic balance expression, and calculate the sum of the third tail gas calorific value of the heat carried by the tail gas discharged by the tail gas discharge unit and the third absorbed calorific value of the heat absorbed by the cooling water;

[0063] According to the output gas heat expression, the cooling water expression, the sum of the third exhaust gas heat value and the third absorbed heat value, the target value of the cooling water inflow temperature, the target value of the cooling water inflow quality, and the target value of the exhaust gas discharge quality, the adjustment values ​​of the exhaust gas discharge temperature and the cooling water outflow temperature are calculated.

[0064] In combination with the second possible implementation of the first aspect, the embodiment of the present application provides a sixth possible implementation of the first aspect, wherein the target task based on the dynamic heat balance determines the main variable and the subordinate variable in the combustion reaction process, including:

[0065] When the goal of the dynamic balance of heat is to adjust the exhaust gas temperature and the exhaust gas inflow so that the exhaust gas temperature, the fuel gas inflow, the fuel gas temperature, the oxygen inflow, the oxygen temperature, the cooling water inflow temperature, the cooling water inflow, the cooling water outflow temperature, and the exhaust gas flow rate reach the target values, the exhaust gas temperature, the fuel gas inflow, the fuel gas temperature, the oxygen inflow, the oxygen temperature, the cooling water inflow temperature, the cooling water inflow, the cooling water outflow temperature, and the exhaust gas flow rate are determined as the main variables, and the exhaust gas temperature and the exhaust gas inflow are determined as the dependent variables;

[0066] Determining the adjustment value of the slave variable according to the target value of the master variable and the heat dynamic balance expression includes:

[0067] Calculate the target value of cooling water inflow quality, the target value of exhaust gas discharge quality, the target value of fuel gas inflow quality, and the target value of oxygen inflow quality according to the target value of cooling water inflow, the target value of exhaust gas discharge flow rate, the target value of fuel gas inflow, and the target value of oxygen inflow;

[0068] calculating a fourth absorbed heat value of heat absorbed by the cooling water based on a target value of the cooling water inflow temperature, a target value of the cooling water inflow quality, a target value of the cooling water outflow temperature, and a cooling water expression;

[0069] A fourth lost heat value of the lost heat is calculated by the loss expression, and a fourth burner heat value of the heat generated by the burner during operation is calculated by a conversion formula between kilowatts and joules and the working power of the burner;

[0070] The fourth absorbed heat value, the fourth lost heat value, and the fourth burner heat value are input into the heat dynamic balance expression, and the equation relationship among the fourth gas heat value of the heat carried by the gas itself entering the combustion chamber, the fourth released heat value of the heat released by the combustion of the gas in the combustion chamber, and the fourth tail gas heat value of the heat carried by the tail gas discharged by the tail gas discharge unit is calculated;

[0071] According to the equation relationship between the fourth gas calorific value, the fourth released calorific value, and the fourth exhaust gas calorific value, as well as according to the target value of exhaust gas temperature, the target value of fuel gas inflow mass, the target value of fuel gas temperature, the target value of oxygen inflow mass, the target value of oxygen temperature, the target value of exhaust gas discharge mass, the reaction heat expression, the input gas calorific expression, and the output gas calorific expression, the adjustment values ​​of exhaust gas discharge temperature and exhaust gas inflow mass are calculated, and according to the adjustment value of exhaust gas inflow mass, the adjustment value of exhaust gas inflow amount is calculated.

[0072] In combination with the second possible implementation of the first aspect, the embodiment of the present application provides a seventh possible implementation of the first aspect, wherein the target task based on the dynamic balance of heat determines the main variable and the subordinate variable in the combustion reaction process, including:

[0073] When the goal of the dynamic balance of heat is to adjust the cooling water inflow and the exhaust gas inflow so that the exhaust gas temperature, the fuel gas inflow, the fuel gas temperature, the oxygen inflow, the oxygen temperature, the cooling water inflow temperature, the cooling water outflow temperature, the exhaust gas discharge temperature, and the exhaust gas discharge flow rate reach the target values, the exhaust gas temperature, the fuel gas inflow, the fuel gas temperature, the oxygen inflow, the oxygen temperature, the cooling water inflow temperature, the cooling water outflow temperature, the exhaust gas discharge temperature, and the exhaust gas discharge flow rate are determined as the main variables, and the cooling water inflow and the exhaust gas inflow are determined as the dependent variables;

[0074] Determining the adjustment value of the slave variable according to the target value of the master variable and the heat dynamic balance expression includes:

[0075] Calculate the target value of exhaust gas discharge quality, the target value of fuel gas inflow quality, and the target value of oxygen inflow quality according to the target value of exhaust gas discharge flow rate, the target value of fuel gas inflow amount, and the target value of oxygen inflow amount;

[0076] Inputting the target value of exhaust gas discharge quality and the target value of exhaust gas discharge temperature into the output gas heat expression, and calculating the fifth exhaust gas heat value of the heat carried by the exhaust gas discharged by the exhaust gas discharge unit;

[0077] A fifth lost heat value of the lost heat is calculated by the loss expression, and a fifth burner heat value of the heat generated by the burner during operation is calculated by a conversion formula between kilowatts and joules and the working power of the burner;

[0078] The fifth tail gas calorific value, the fifth loss calorific value, and the fifth burner calorific value are input into the heat dynamic balance expression to calculate the relationship between the fifth gas calorific value of the heat carried by the gas entering the combustion chamber, the fifth released calorific value of the heat released by the combustion of the gas in the combustion chamber, and the fifth absorbed calorific value of the heat absorbed by the cooling water;

[0079] Calculate adjustment values ​​of cooling water inflow mass and exhaust gas inflow mass according to the relationship equation among the fifth gas calorific value, the fifth released calorific value and the fifth absorbed calorific value, the target value of exhaust gas temperature, the target value of fuel gas inflow mass, the target value of fuel gas temperature, the target value of oxygen inflow mass, the target value of oxygen temperature, the input gas calorific value expression, the reaction heat expression, the cooling water expression, the target value of cooling water inflow temperature, and the target value of cooling water outflow temperature;

[0080] An adjustment value of the cooling water inflow amount is calculated based on the adjustment value of the cooling water inflow mass, and an adjustment value of the exhaust gas inflow amount is calculated based on the adjustment value of the exhaust gas inflow mass.

[0081] In combination with the second possible implementation of the first aspect, the embodiment of the present application provides an eighth possible implementation of the first aspect, wherein the target task based on the dynamic balance of heat determines the main variable and the subordinate variable in the combustion reaction process, including:

[0082] When the goal of the dynamic balance of heat is to adjust the exhaust gas inflow and cooling water outflow temperature so that the exhaust gas temperature, fuel gas inflow, fuel gas temperature, oxygen inflow, oxygen temperature, cooling water inflow temperature, cooling water inflow, and tail gas discharge temperature reach the target values, the exhaust gas temperature, fuel gas inflow, fuel gas temperature, oxygen inflow, oxygen temperature, cooling water inflow temperature, cooling water inflow, and tail gas discharge temperature are determined as the main variables, and the exhaust gas inflow and cooling water outflow temperature are determined as the dependent variables;

[0083] Determining the adjustment value of the slave variable according to the target value of the master variable and the heat dynamic balance expression includes:

[0084] Calculate the target value of exhaust gas discharge quality, the target value of fuel gas inflow quality, and the target value of oxygen inflow quality according to the target value of exhaust gas discharge flow rate, the target value of fuel gas inflow amount, and the target value of oxygen inflow amount;

[0085] Inputting the target value of the exhaust gas discharge quality and the target value of the exhaust gas discharge temperature into the output gas heat expression, and calculating the sixth exhaust gas heat value of the heat carried by the exhaust gas discharged by the exhaust gas discharge unit;

[0086] A sixth lost heat value of the lost heat is calculated by the loss expression, and a sixth burner heat value of the heat generated by the burner during operation is calculated by a conversion formula between kilowatts and joules and the working power of the burner;

[0087] Input the sixth tail gas calorific value, the sixth loss calorific value, and the sixth burner calorific value into the heat dynamic balance expression, and calculate the relationship equation between the sixth gas calorific value of the heat carried by the gas entering the combustion chamber, the sixth released calorific value of the heat released by the combustion of the gas in the combustion chamber, and the sixth absorbed calorific value of the heat absorbed by the cooling water;

[0088] According to the relationship equation among the sixth gas calorific value, the sixth released calorific value and the sixth absorbed calorific value, the target value of the exhaust gas temperature, the target value of the fuel gas inflow mass, the target value of the fuel gas temperature, the target value of the oxygen inflow mass, the target value of the oxygen temperature, the input gas calorific value expression, the reaction heat expression, the cooling water expression, the target value of the cooling water inflow temperature, and the target value of the cooling water inflow mass, the adjustment values ​​of the cooling water outlet temperature and the exhaust gas inflow mass are calculated, and the adjustment value of the exhaust gas inflow amount is calculated based on the adjustment value of the exhaust gas inflow mass.

[0089] In a second aspect, the embodiment of the present application further provides a heat dynamic balance control system for exhaust gas treatment, the heat dynamic balance control system for exhaust gas treatment comprising: a gas input pipeline, an oxygen input pipeline, an exhaust gas input pipeline, an exhaust gas combustion treatment unit, a cooling unit, an exhaust gas emission unit and the heat dynamic balance controller; the gas input pipeline and the oxygen input pipeline are both connected to the burner in the exhaust gas combustion treatment unit; the burner and the exhaust gas input pipeline are both connected to the combustion chamber in the exhaust gas combustion treatment unit; the cooling unit is respectively connected to the combustion chamber and the exhaust gas emission unit;

[0090] The burner is used to spray the gas in the gas input pipeline and the oxygen in the oxygen input pipeline into the combustion chamber, so as to assist the combustion of the exhaust gas flowing from the exhaust gas input pipeline into the combustion chamber in the combustion chamber; the cooling unit is used to absorb the heat released during the combustion of the exhaust gas and the heat of the gas itself in the combustion chamber through cooling water; the exhaust gas discharge unit is used to discharge the exhaust gas formed by the combustion reaction from the combustion chamber;

[0091] The heat dynamic balance controller is used for:

[0092] Based on the target task of heat dynamic balance, determine the main and subordinate variables in the combustion reaction process;

[0093] Determining the adjustment value of the slave variable according to the target value of the master variable and the heat dynamic balance expression;

[0094] During the combustion reaction, the slave variable is adjusted based on the adjustment value.

[0095] The embodiment of the present application provides a method and system for controlling the heat dynamic balance of waste gas treatment, wherein the method for controlling the heat dynamic balance of waste gas treatment is applied to a heat dynamic balance controller in a heat dynamic balance control system for waste gas treatment; the heat dynamic balance control system for waste gas treatment comprises: a gas input pipeline, an oxygen input pipeline, a waste gas input pipeline, a waste gas combustion treatment unit, a cooling unit, a tail gas emission unit and a heat dynamic balance controller; the gas input pipeline and the oxygen input pipeline are both connected to the burner in the waste gas combustion treatment unit; the burner and the waste gas input pipeline are both connected to the combustion chamber in the waste gas combustion treatment unit; the cooling unit is respectively connected to the combustion chamber and the tail gas emission unit wherein the burner is used to spray the gas in the gas input pipeline and the oxygen in the oxygen input pipeline into the combustion chamber, so as to assist the combustion of the exhaust gas flowing from the exhaust gas input pipeline into the combustion chamber in the combustion chamber; the cooling unit is used to absorb the heat released during the combustion of the exhaust gas and the heat of the gas itself in the combustion chamber through cooling water; the tail gas discharge unit is used to discharge the tail gas formed by the combustion reaction from the combustion chamber; the method includes: determining the main variable and the subordinate variable in the combustion reaction process based on the target task of the dynamic balance of heat; determining the adjustment value of the subordinate variable according to the target value of the main variable and the dynamic balance expression of heat; and adjusting the subordinate variable based on the adjustment value during the combustion reaction. In this embodiment, the subordinate variable in the exhaust gas treatment process is automatically and dynamically adjusted through dynamic balance heat calculation, thereby improving the utilization rate of heat in the exhaust gas treatment process and achieving optimal purification of the exhaust gas.

[0096] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0097] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0098] Figure 1 A schematic diagram of the structure of a heat dynamic balance control system for exhaust gas treatment provided by an embodiment of the present application is shown;

[0099] Figure 2A schematic diagram of the three-dimensional structure of a first spray device provided in an embodiment of the present application is shown;

[0100] Figure 3 A schematic diagram of the three-dimensional structure of a second spray device provided in an embodiment of the present application is shown;

[0101] Figure 4 A flow chart of a method for dynamic heat balance control of waste gas treatment provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0102] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0103] Considering that in actual application, if the heat released by exhaust gas combustion is too much and the cooling water inflow is too little, the released heat will not be properly absorbed, resulting in the exhaust gas temperature being too high, which poses a safety risk. Based on this, the embodiment of the present application provides a method and system for controlling the dynamic balance of heat in exhaust gas treatment to improve the utilization rate of the heat generated in the exhaust gas treatment process, which is described below through an embodiment.

[0104] To facilitate understanding of this embodiment, a method for controlling the heat dynamic balance of waste gas treatment disclosed in the embodiment of this application is first introduced in detail. The method for controlling the heat dynamic balance of waste gas treatment is applied to a heat dynamic balance controller in a heat dynamic balance control system for waste gas treatment; Figure 1 As shown, the heat dynamic balance control system for exhaust gas treatment includes: a gas input pipeline 1, an oxygen input pipeline 4, an exhaust gas input pipeline 7, an exhaust gas combustion treatment unit, a cooling unit, an exhaust gas emission unit and a heat dynamic balance controller; the gas input pipeline 1 and the oxygen input pipeline 4 are both connected to the burner 11 in the exhaust gas combustion treatment unit; the burner 11 and the exhaust gas input pipeline 7 are both connected to the combustion chamber 23 in the exhaust gas combustion treatment unit; the cooling unit is respectively connected to the combustion chamber 23 and the exhaust gas emission unit.

[0105] Among them, the burner 11 is used to spray the gas in the gas input pipeline 1 and the oxygen in the oxygen input pipeline 4 into the combustion chamber 23, so as to assist the combustion of the exhaust gas flowing into the combustion chamber 23 from the exhaust gas input pipeline 7 in the combustion chamber 23; the cooling unit is used to absorb the heat released during the combustion of the exhaust gas and the heat of the gas itself in the combustion chamber through cooling water; the exhaust gas emission unit is used to discharge the exhaust gas formed by the combustion reaction from the combustion chamber 23.

[0106] In a possible implementation, Figure 1 As shown, the fuel gas input pipeline 1 is provided with a first temperature controller 2 and a first gas flow controller 3; the oxygen input pipeline 4 is provided with a second temperature controller 5 and a second gas flow controller 6; the exhaust gas input pipeline 7 is provided with a first gas analyzer 8, a third temperature controller 9, and a gas flow meter 10;

[0107] The cooling unit comprises a water tank 13, a water inlet pipe 17, and a water outlet pipe 20; the water inlet pipe 17 and the water outlet pipe 20 are both connected to the water tank 13; the water inlet pipe 17 is provided with a water inlet temperature controller 18 and a water inlet flow controller 19; the water outlet pipe 20 is provided with a water outlet temperature controller 22 and a water outlet flow controller 21;

[0108] The combustion chamber 23 is connected to the water tank 13, and the water tank 13 is located below the combustion chamber 23; a first spray device 12 is provided on the inner wall of the combustion chamber 23 near the water tank 13; the first spray device 12 is used to absorb cooling water in the water tank 13 and spray cooling water into the combustion chamber 23, so as to absorb the heat released during the combustion of the exhaust gas and the heat of the gas in the combustion chamber 23 through the sprayed cooling water; the water tank 13 is used to collect the cooling water sprayed by the first spray device 12; Figure 2 As shown, a schematic diagram of the three-dimensional structure of the first spray device 12 is shown.

[0109] The tail gas emission unit includes a tail gas emission pipeline 14 and a water-cooled spray tower 24; a gas temperature monitor 15 and a second gas analyzer 16 are arranged on the tail gas emission pipeline 14; the water-cooled spray tower 24 is connected to the tail gas emission pipeline 14 and the water tank 13 respectively, and the water tank 13 is located below the water-cooled spray tower 24; the combustion chamber 23 is connected to the water-cooled spray tower 24 through the water tank 13, and the tail gas in the combustion chamber 23 flows into the water-cooled spray tower 24 through the water tank 13 and is discharged from the tail gas emission pipeline 14;

[0110] A second spray device 25 is provided on the inner wall of the water-cooled spray tower 24 near the water tank 13. The second spray device 25 is used to absorb cooling water in the water tank 13 and spray cooling water into the water-cooled spray tower 24, so as to absorb heat in the exhaust gas through the sprayed cooling water. Figure 3 As shown, a schematic structural diagram of the second spray device 25 is shown.

[0111] In this embodiment, the heat dynamic balance controller is respectively communicated with the first temperature controller 2, the first gas flow controller 3, the second temperature controller 5, the second gas flow controller 6, the first gas analyzer 8, the third temperature controller 9, the gas flow meter 10, the gas temperature monitor 15, the second gas analyzer 16, the water inlet temperature controller 18, the water inlet flow controller 19, the water outlet flow controller 21, and the water outlet temperature controller 22.

[0112] The first temperature controller 2 is used to control and monitor the temperature of the gas output from the gas input pipeline 1 to the burner 11 ; the first gas flow controller 3 is used to control and monitor the flow of the gas output from the gas input pipeline 1 to the burner 11 .

[0113] The second temperature controller 5 is used to control and monitor the temperature of the oxygen output from the oxygen input pipeline 4 to the burner 11 ; the second gas flow controller 6 is used to control and monitor the flow of the oxygen output from the oxygen input pipeline 4 to the burner 11 .

[0114] The first gas analyzer 8 is used to analyze the composition of the exhaust gas in the exhaust gas input pipeline; the third temperature controller 9 is used to control and monitor the temperature of the exhaust gas output from the exhaust gas input pipeline 7 to the combustion chamber 23; the gas flow meter is used to control and monitor the flow rate of the exhaust gas output from the exhaust gas input pipeline 7 to the combustion chamber 23.

[0115] The gas temperature monitor 15 is used to control and monitor the temperature of the exhaust gas discharged from the exhaust gas exhaust pipeline 14 ; the second gas analyzer 16 is used to analyze the components of the exhaust gas in the exhaust gas exhaust pipeline 14 .

[0116] The water inlet temperature controller 18 is used to control and monitor the temperature of the cooling water input into the water tank 13; the water inlet flow controller 19 is used to control and monitor the flow of the cooling water input into the water tank 13; the water outlet flow controller 21 is used to control and monitor the flow of the cooling water output from the water tank 13; the water outlet temperature controller 22 is used to control and monitor the temperature of the cooling water output from the water tank 13.

[0117] like Figure 4 As shown, the method comprises the following steps:

[0118] S101: Determine the main variable and the subordinate variable in the combustion reaction process based on the target task of heat dynamic balance;

[0119] S102: Determine the adjustment value of the slave variable according to the target value of the master variable and the heat dynamic balance expression;

[0120] S103: During the combustion reaction process, the slave variable is adjusted based on the adjustment value.

[0121] In a possible implementation, the waste gas may be hydrogen (H2), and the fuel gas may be methane (CH4), and the combustion reaction equation for the combustion reaction with oxygen is:

[0122] 2H2+O2=2H2O

[0123] CH4+2O2=CO2+2H2O

[0124] Among them, the reaction between hydrogen and oxygen will release heat, and the combustion reaction between hydrogen and oxygen requires flame. The reaction between methane and oxygen provides the flame conditions for the combustion reaction.

[0125] In this embodiment, when the exhaust gas is hydrogen and the fuel gas is methane, the heat dynamic balance controller can also calculate the required oxygen inflow in the combustion chamber 23 according to the molar ratio of hydrogen to oxygen (2:1), the molar ratio of methane to oxygen (1:2) in the combustion reaction equation, and the actual inflow of hydrogen and the actual inflow of methane in the combustion chamber 23. Then the heat dynamic balance controller can send the required oxygen inflow to the second gas flow controller 6, and the second gas flow controller 6 controls the inflow of oxygen to reach the required oxygen inflow.

[0126] In this way, it can be ensured that the hydrogen and oxygen in the combustion chamber 23 can be completely burned, and the methane and oxygen can be completely burned, thereby avoiding the waste of hydrogen, oxygen and methane.

[0127] In a possible implementation, the heat dynamic balance expression in step S102 is:

[0128] Q 输入 +Q 烧嘴 +Q 反应热 =Q 输出 +Q 冷却 +Q 损失

[0129] Among them, Q 输入 represents the heat carried by the gas (including fuel gas, exhaust gas and oxygen) entering the combustion chamber 23; Q 烧嘴 Indicates the heat generated by the burner 11 during operation; Q 反应热 represents the heat released by the combustion of gas in the combustion chamber 23; Q 输出 Indicates the heat carried by the exhaust gas discharged from the exhaust emission unit; Q 冷却 Indicates the heat absorbed by cooling water; Q 损失 Represents the amount of heat lost.

[0130] In this embodiment, when the waste gas is hydrogen and the fuel gas is methane, if the hydrogen, oxygen and methane in the combustion chamber 23 can be completely burned, then the tail gas refers to carbon dioxide (CO2). If the hydrogen, oxygen and methane in the combustion chamber 23 cannot be completely burned, then the tail gas may contain carbon dioxide (CO2) and one or more of hydrogen, oxygen and methane.

[0131] In this embodiment, when calculating Q 输入 The heat Q carried by the gas entering the combustion chamber can be calculated by the following input gas heat expression: 输入 :

[0132] Q 输入 =C 氧 m 氧 t 氧 +C 燃 m 燃 t 燃 +C 废 m 废 t 废

[0133] Among them, C 氧 represents the specific heat capacity of oxygen; m 氧 represents the mass of oxygen entering the combustion chamber 23; t 氧 represents the temperature of the oxygen entering the combustion chamber 23; C 燃 Indicates the specific heat capacity of the gas; m 燃 Indicates the mass of the fuel gas entering the combustion chamber 23; t 燃 Indicates the temperature of the gas entering the combustion chamber 23; C 废 Indicates the specific heat capacity of the exhaust gas; m 废 represents the mass of the exhaust gas entering the combustion chamber 23; t 废 Indicates the temperature of the exhaust gas entering the combustion chamber 23.

[0134] The mass m of the exhaust gas entering the combustion chamber 23 is 废 It can be calculated based on the density of the exhaust gas and the inflow rate of the exhaust gas into the combustion chamber 23 .

[0135] In this embodiment, the heat Q generated by the burner 11 during operation is calculated. 烧嘴 It can be calculated by the conversion formula between kilowatts and joules and the working power of the burner.

[0136] In this embodiment, when calculating Q 反应热 The heat Q released by the combustion of the gas in the combustion chamber can be calculated by the following reaction heat expression: 反应热 :

[0137] Q反应热 =m 废 q 废 +m 燃 q 燃 +m 氧 q 氧

[0138] Or, Q 反应热 =m 废 ΔH 废 +m 燃 ΔH 燃 +m 氧 ΔH 氧

[0139] Among them, m 废 Indicates the mass of the exhaust gas from combustion; m 燃 Indicates the mass of the gas burned; m 氧 Indicates the mass of oxygen burned; q 废 Indicates the calorific value of the exhaust gas from combustion; q 燃 Indicates the calorific value of the burning gas; q 氧 Indicates the calorific value of the oxygen being burned; ΔH 废 Indicates the heat of combustion or enthalpy change of the exhaust gas; ΔH 燃 Indicates the heat of combustion or enthalpy change of the burning gas; ΔH 氧 Represents the heat of combustion or enthalpy change of the burning oxygen.

[0140] In this embodiment, when calculating Q 输出 The heat Q carried by the exhaust gas discharged from the exhaust emission unit can be calculated by the following output gas heat expression: 输出 :

[0141]

[0142] Where n represents the number of types of gases contained in the exhaust gas; C 尾 Indicates the specific heat capacity of the exhaust gas; m 尾 Indicates the mass of exhaust gas; t 尾 Indicates the temperature of the exhaust gas.

[0143] For example, if the tail gas contains only carbon dioxide, then n is equal to 1. If the tail gas contains carbon dioxide and oxygen, then n is equal to 2.

[0144] In this embodiment, when calculating Q 冷却 The heat absorbed by the cooling water, Q, can be calculated by the following cooling water expression: 冷却 :

[0145] Q 冷却 =C 冷 m 冷 Δt冷

[0146] Among them, C 冷 Represents the specific heat capacity of cooling water; m 冷 Indicates the quality of cooling water entering the water tank; Δt 冷 Indicates the temperature difference between the temperature of the cooling water entering the water tank and the temperature of the cooling water flowing out of the water tank.

[0147] Exemplarily, the cooling water may be water (H2O). Normally, the temperature of the cooling water entering the water tank is lower than the temperature of the cooling water flowing out of the water tank.

[0148] In this embodiment, when calculating Q 损失 The lost heat Q loss can be calculated by the following loss expression:

[0149] Q 损失 =A 腔 a r腔 (t w腔 -t a腔 )τ+A 塔 a r塔 (t w塔 -t a塔 )τ

[0150] Among them, A 腔 represents the surface area of ​​the inner wall of the combustion chamber 23; a r腔 represents the combined heat transfer coefficient of the inner wall of the combustion chamber 23 to the air; t w腔 represents the inner wall temperature of the combustion chamber 23; t a腔 represents the temperature of the environment in which the combustion chamber 23 is located; τ represents the time of the combustion reaction; A 塔 represents the surface area of ​​the inner wall of the water-cooled spray tower 24; a r塔 represents the combined heat transfer coefficient of the inner wall of the water-cooled spray tower 24 to the air; t w塔 Indicates the inner wall temperature of the water-cooled spray tower 24; t a塔 Indicates the temperature of the environment in which the water-cooled spray tower 24 is located.

[0151] Normally, the combustion chamber 23 and the water-cooled spray tower 24 are in the same environment, so t a腔 With t a塔 same.

[0152] In a first possible implementation, when executing step S101, it can be specifically performed according to the following steps: when the goal of dynamic heat balance is to adjust the cooling water inflow and the cooling water outflow temperature so that the exhaust gas inflow, exhaust gas temperature, gas inflow, gas temperature, oxygen inflow, oxygen temperature, cooling water inflow temperature, exhaust gas exhaust temperature, and exhaust gas exhaust flow rate reach the target values, the exhaust gas inflow, exhaust gas temperature, gas inflow, gas temperature, oxygen inflow, oxygen temperature, cooling water inflow temperature, exhaust gas exhaust temperature, and exhaust gas exhaust flow rate are determined as main variables, and the cooling water inflow and the cooling water outflow temperature are determined as slave variables.

[0153] At this time, when executing step S102, the following steps S201-S207 may be specifically performed:

[0154] S201: According to the target value of exhaust gas inflow, the target value of fuel gas inflow, the target value of oxygen inflow and the target value of exhaust gas discharge flow, the target value of exhaust gas quality, the target value of fuel gas quality, the target value of oxygen quality and the target value of exhaust gas discharge quality are determined respectively.

[0155] In this embodiment, the target value of the gas (waste gas, fuel gas, oxygen, tail gas) quality can be calculated based on the product of the target value of the gas (waste gas, fuel gas, oxygen, tail gas) inflow and the gas density.

[0156] S202: Input the target value of the exhaust gas quality mwaste, the target value of the fuel gas quality mburn, the target value of the oxygen quality mitch, the target value of the exhaust gas temperature twaste, the target value of the fuel gas temperature tburn, and the target value of the oxygen temperature titch into the following input gas heat expression to calculate the first gas heat value of the heat Qinput carried by the gas itself entering the combustion chamber:

[0157] Q 输入 =C 氧 m 氧 t 氧 +C 燃 m 燃 t 燃 +C 废 m 废 t 废

[0158] S203: The exhaust gas mass m 废 Target value, gas quality m 燃 Target value, oxygen mass m 氧 The target value is input into the following reaction heat expression to calculate the heat Q released by the combustion of the gas in the combustion chamber. 反应热 The first release heat value:

[0159] Q 反应热 =m废 q 废 +m 燃 q 燃 +m 氧 q 氧

[0160] Or, Q 反应热 =m 废 ΔH 废 +m 燃 ΔH 燃 +m 氧 ΔH 氧

[0161] S204: exhaust gas discharge temperature t 尾 The target value of exhaust gas mass m 尾 The target value is input into the following gas heat expression to calculate the heat Q carried by the exhaust gas discharged from the exhaust emission unit 输出 The first tail gas calorific value:

[0162]

[0163] For example, when the tail gas contains two gases (tail gas 1, tail gas 2), Q 输出 =C 尾1 m 尾1 t 尾1 +C 尾2 m 尾2 t 尾2 .

[0164] S205: Calculate the lost heat Q through the loss expression 损失 The first heat loss value, and the heat Q generated by the burner during operation is calculated through the conversion formula between kilowatts and joules and the working power of the burner. 烧嘴 The calorific value of the first burner.

[0165] S206: inputting the first gas calorific value, the first released calorific value, the first lost calorific value, the first burner calorific value and the first tail gas calorific value into a heat dynamic balance expression to calculate a first absorbed calorific value of the heat absorbed by the cooling water;

[0166] In this embodiment, Q 输入 The first gas calorific value, Q 反应热 The first heat release value, Q 损失 The first heat loss value, Q 烧嘴 The calorific value of the first burner and Q 输出 The heat value of the first exhaust gas is input into the following heat dynamic balance expression, and the heat absorbed by the cooling water Q 冷却 The first absorption heat value:

[0167] Q 输入 +Q 烧嘴 +Q 反应热 =Q 输出 +Q 冷却 +Q 损失

[0168] S207: Input the first absorbed heat value and the target value of the cooling water inflow temperature into the cooling water expression, calculate the adjustment values ​​of the cooling water quality and the cooling water outflow temperature, and determine the adjustment value of the cooling water inflow amount according to the adjustment value of the cooling water quality.

[0169] In this embodiment, Q 冷却 The first absorbed heat value, cooling water inflow temperature t 冷入 The target value is input into the following cooling water expression to calculate the cooling water quality m 冷 and cooling water outlet temperature t 冷出 Adjustment value:

[0170] Q 冷却 =C 冷 m 冷 Δt 冷

[0171] Δt 冷 =t 冷出 -t 冷入

[0172] Next, according to the cooling water mass m 冷 The adjustment value and cooling water density are used to determine the cooling water inflow L 冷 adjustment value.

[0173] At this time, when executing step S103, during the combustion reaction, according to the cooling water inflow L 冷 The cooling water inflow is adjusted according to the adjustment value, and the cooling water outflow temperature t 冷出 Adjust the cooling water outlet temperature according to the adjustment value.

[0174] In a second possible implementation, when executing step S101, it can be specifically performed according to the following steps: when the goal of dynamic heat balance is to adjust the exhaust gas exhaust temperature and the cooling water inflow so that the exhaust gas inflow, exhaust gas temperature, gas inflow, gas temperature, oxygen inflow, oxygen temperature, cooling water inflow temperature, cooling water outflow temperature, and exhaust gas discharge flow rate reach the target values, the exhaust gas inflow, exhaust gas temperature, gas inflow, gas temperature, oxygen inflow, oxygen temperature, cooling water inflow temperature, cooling water outflow temperature, and exhaust gas discharge flow rate are determined as main variables, and the exhaust gas exhaust temperature and cooling water inflow are determined as slave variables.

[0175] At this time, when executing step S102, the following steps S301-S306 may be specifically performed:

[0176] S301: According to the target value of exhaust gas inflow, fuel gas inflow, oxygen inflow and exhaust gas discharge flow, the target value of exhaust gas quality, fuel gas quality, oxygen quality and exhaust gas discharge quality are determined respectively.

[0177] In this embodiment, the target value of the gas (waste gas, fuel gas, oxygen, tail gas) quality can be calculated based on the product of the target value of the gas (waste gas, fuel gas, oxygen, tail gas) inflow and the gas density.

[0178] S302: The exhaust gas mass m 废 Target value, gas quality m 燃 Target value, oxygen mass m 氧 The target value of exhaust gas temperature t 废 The target value of gas temperature t 燃 The target value of oxygen temperature t 氧 The target value is input into the following input gas heat expression to calculate the heat Q carried by the gas entering the combustion chamber. 输入 The calorific value of the second gas:

[0179] Q 输入 =C 氧 m 氧 t 氧 +C 燃 m 燃 t 燃 +C 废 m 废 t 废

[0180] S303: The exhaust gas mass m 废 Target value, gas quality m 燃 Target value, oxygen mass m 氧 The target value is input into the following reaction heat expression to calculate the heat Q released by the combustion of the gas in the combustion chamber. 反应热 The second heat release value:

[0181] Q 反应热 =m 废 q 废 +m 燃 q 燃 +m 氧 q 氧

[0182] Or, Q 反应热 =m 废 ΔH 废 +m燃 ΔH 燃 +m 氧 ΔH 氧

[0183] S304: Calculate the lost heat Q through the loss expression 损失 The second heat loss value, and the heat Q generated by the burner during operation is calculated through the conversion formula between kilowatts and joules and the working power of the burner. 烧嘴 The calorific value of the second burner.

[0184] S305: Input the second gas calorific value, the second released calorific value, the second lost calorific value and the second burner calorific value into the heat dynamic balance expression, and calculate the sum of the second exhaust gas calorific value of the heat carried by the exhaust gas discharged by the exhaust gas emission unit and the second absorbed calorific value of the heat absorbed by the cooling water.

[0185] In this embodiment, Q 输入 The second gas calorific value, Q 反应热 The second heat release value, Q 损失 The second heat loss value, Q 烧嘴 The heat value of the second burner is input into the dynamic heat balance expression to calculate the heat Q carried by the exhaust gas discharged from the exhaust emission unit 输出 The calorific value of the second exhaust gas and the heat absorbed by the cooling water Q 冷却 The sum of the second absorbed heat values:

[0186] Q 输入 +Q 烧嘴 +Q 反应热 =Q 输出 +Q 冷却 +Q 损失

[0187] S306: According to the following output gas heat expression, cooling water expression, Q 输出 The calorific value of the second tail gas and Q 冷却 The sum of the second absorption heat value and the exhaust gas mass m 尾 The target value of cooling water inflow temperature t 冷入 The target value of cooling water outlet temperature t 冷出 The target value is used to calculate the exhaust gas temperature t 尾 and cooling water inflow mass m 冷 The adjustment value of the cooling water inflow mass m 冷 Calculate the cooling water inflow L by adjusting the value of 冷 adjustment value.

[0188]

[0189] Q冷却 =C 冷 m 冷 Δt 冷

[0190] Δt 冷 =t 冷出 -t 冷入

[0191] In this embodiment, the cooling water inflow mass m 冷 The adjustment value and cooling water density are used to calculate the cooling water inflow L 冷 adjustment value.

[0192] At this time, when executing step S103, the exhaust gas temperature t 尾 Adjust the exhaust gas temperature according to the adjustment value of the cooling water inflow L 冷 Adjust the cooling water inflow by adjusting the adjustment value.

[0193] In a third possible implementation, when executing step S101, it can be specifically performed according to the following steps: when the goal of dynamic heat balance is to adjust the exhaust gas exhaust temperature and the cooling water outflow temperature so that the exhaust gas inflow, exhaust gas temperature, gas inflow, gas temperature, oxygen inflow, oxygen temperature, cooling water inflow temperature, cooling water inflow, and exhaust gas exhaust flow rate reach the target values, the exhaust gas inflow, exhaust gas temperature, gas inflow, gas temperature, oxygen inflow, oxygen temperature, cooling water inflow temperature, cooling water inflow, and exhaust gas exhaust flow rate are determined as main variables, and the exhaust gas exhaust temperature and the cooling water outflow temperature are determined as slave variables.

[0194] At this time, when executing step S102, the following steps S401-S406 may be specifically performed:

[0195] S401: According to the target value of exhaust gas inflow, the target value of fuel gas inflow, the target value of oxygen inflow, the target value of exhaust gas discharge flow rate and the target value of cooling water inflow, the target value of exhaust gas quality, the target value of fuel gas quality, the target value of oxygen quality, the target value of exhaust gas discharge quality and the target value of cooling water inflow quality are determined respectively.

[0196] In this embodiment, the target value of the gas (waste gas, fuel gas, oxygen, tail gas) mass can be calculated based on the product of the target value of the gas (waste gas, fuel gas, oxygen, tail gas) inflow and the gas density. The cooling water inflow mass m is calculated based on the target value of the cooling water inflow and the cooling water density. 冷 target value.

[0197] S402: The exhaust gas mass m 废 Target value, gas quality m 燃 Target value, oxygen mass m氧 The target value of exhaust gas temperature t 废 The target value of gas temperature t 燃 The target value of oxygen temperature t 氧 The target value is input into the following input gas heat expression to calculate the heat Q carried by the gas entering the combustion chamber. 输入 The calorific value of the third gas:

[0198] Q 输入 =C 氧 m 氧 t 氧 +C 燃 m 燃 t 燃 +C 废 m 废 t 废

[0199] S403: The exhaust gas mass m 废 Target value, gas quality m 燃 Target value, oxygen mass m 氧 The target value is input into the following reaction heat expression to calculate the heat Q released by the combustion of the gas in the combustion chamber. 反应热 The third heat release value:

[0200] Q 反应热 =m 废 q 废 +m 燃 q 燃 +m 氧 q 氧

[0201] Or, Q 反应热 =m 废 ΔH 废 +m 燃 ΔH 燃 +m 氧 ΔH 氧

[0202] S404: Calculate the lost heat Q through the loss expression 损失 The third heat loss value, and the heat Q generated by the burner during operation is calculated through the conversion formula between kilowatts and joules and the working power of the burner. 烧嘴 The calorific value of the third burner.

[0203] S405: Input the third gas calorific value, the third released calorific value, the third lost calorific value and the third burner calorific value into the heat dynamic balance expression, and calculate the sum of the third exhaust gas calorific value of the heat carried by the exhaust gas discharged by the exhaust gas emission unit and the third absorbed calorific value of the heat absorbed by the cooling water.

[0204] In this embodiment, Q 输入 The third gas calorific value, Q 反应热 The third heat release value, Q 损失 The third heat loss value, Q 烧嘴 The heat value of the third burner is input into the following heat dynamic balance expression to calculate the heat Q carried by the exhaust gas discharged from the exhaust emission unit 输出 The calorific value of the third exhaust gas and the heat absorbed by the cooling water Q 冷却 The sum of the third absorbed heat values:

[0205] Q 输入 +Q 烧嘴 +Q 反应热 =Q 输出 +Q 冷却 +Q 损失

[0206] S406: According to the following output gas heat expression, cooling water expression, Q 输出 The third tail gas calorific value and Q 冷却 The sum of the third absorbed heat value and the cooling water inflow temperature t 冷入 Target value, cooling water inflow mass m 冷 The target value of exhaust gas mass m 尾 The target value is used to calculate the exhaust gas temperature t 尾 and cooling water outlet temperature t 冷出 Adjustment value:

[0207]

[0208] Q 冷却 =C 冷 m 冷 Δt 冷

[0209] Δt 冷 =t 冷出 -t 冷入

[0210] At this time, when executing step S103, according to the exhaust gas exhaust temperature t 尾 The exhaust gas temperature is adjusted according to the adjustment value, and the cooling water outflow temperature t 冷出 Adjust the cooling water outlet temperature by adjusting the adjustment value.

[0211] In a fourth possible implementation, when executing step S101, it can be specifically performed according to the following steps: when the goal of dynamic heat balance is to adjust the exhaust gas exhaust temperature and the waste gas inflow so that the exhaust gas temperature, the fuel gas inflow, the fuel gas temperature, the oxygen inflow, the oxygen temperature, the cooling water inflow temperature, the cooling water inflow, the cooling water outflow temperature, and the exhaust gas exhaust flow rate reach the target values, the exhaust gas temperature, the fuel gas inflow, the fuel gas temperature, the oxygen inflow, the oxygen temperature, the cooling water inflow temperature, the cooling water inflow, the cooling water outflow temperature, and the exhaust gas exhaust flow rate are determined as the main variables, and the exhaust gas exhaust temperature and the waste gas inflow are determined as the slave variables.

[0212] At this time, when executing step S102, the following steps S501-S505 may be specifically performed:

[0213] S501: Calculate the target value of cooling water inflow quality, the target value of exhaust gas exhaust flow, the target value of fuel gas inflow quality, and the target value of oxygen inflow quality based on the target value of cooling water inflow, the target value of exhaust gas exhaust flow, the target value of fuel gas inflow, and the target value of oxygen inflow.

[0214] In this embodiment, the target value of the exhaust gas discharge flow rate and the exhaust gas density are calculated to obtain the target value of the exhaust gas discharge mass mtail. The target value of the gas (fuel gas, oxygen) inflow amount and the gas density are calculated to obtain the target value of the gas (fuel gas, oxygen) inflow mass. The target value of the cooling water inflow amount and the cooling water density are calculated to obtain the target value of the cooling water inflow mass.

[0215] S502: Based on the cooling water inflow temperature t 冷入 Target value, cooling water inflow mass m 冷 The target value of cooling water outlet temperature t 冷出 The target value and the following cooling water expression are used to calculate the heat absorbed by the cooling water, Q 冷却 The fourth absorption heat value:

[0216] Q 冷却 =C 冷 m 冷 Δt 冷

[0217] Δt 冷 =t 冷出 -t 冷入

[0218] S503: Calculate the lost heat Q through the loss expression 损失 The fourth heat loss value, and the heat Q generated by the burner during operation is calculated through the conversion formula between kilowatts and joules and the working power of the burner. 烧嘴 The calorific value of the fourth burner.

[0219] S504: Q 冷却 The fourth absorption heat value, Q 损失 The fourth heat loss value, Q 烧嘴 The heat value of the fourth burner is input into the following heat dynamic balance expression to calculate the heat Q carried by the gas entering the combustion chamber. 输入 The fourth gas calorific value, the heat Q released by the gas burning in the combustion chamber 反应热 The fourth released heat value, the heat Q carried by the exhaust gas discharged by the exhaust emission unit 输出 The equation relationship between the fourth tail gas calorific value is:

[0220] Q 输入 +Q 烧嘴 +Q 反应热 =Q 输出 +Q 冷却 +Q 损失

[0221] S505: According to Q 输入 The fourth gas calorific value, Q 反应热 The fourth heat release value, Q 输出 The fourth exhaust calorific value is related to the equation, and according to the exhaust gas temperature t 废 The target value of the gas inflow mass m 燃 The target value of gas temperature t 燃 Target value, oxygen inflow mass m 氧 The target value of oxygen temperature t 氧 The target value of exhaust gas mass m 尾 The target value, the following reaction heat expression, the input gas heat expression, the output gas heat expression, calculate the exhaust gas discharge temperature t 尾 and exhaust gas inflow mass m 废 The adjustment value of the exhaust gas inflow mass m 废 Calculate the adjustment value of the exhaust gas inflow:

[0222] Q 反应热 =m 废 q 废 +m 燃 q 燃 +m 氧 q 氧

[0223] Or, Q 反应热 =m 废 ΔH 废 +m 燃 ΔH 燃 +m 氧 ΔH 氧

[0224] Q 输入 =C 氧 m 氧 t 氧 +C 燃 m 燃 t 燃 +C 废 m 废 t 废

[0225]

[0226] In this embodiment, the exhaust gas inflow mass m 废 The adjustment value of the exhaust gas inflow can be calculated based on the adjustment value and the exhaust gas density.

[0227] At this time, when executing step S103, during the combustion reaction, the exhaust gas exhaust temperature can be adjusted according to the adjustment value of the exhaust gas exhaust temperature ttail, and the exhaust gas inflow rate can be adjusted according to the adjustment value of the exhaust gas inflow rate.

[0228] In a fifth possible implementation, when executing step S101, it can be specifically performed according to the following steps: when the goal of dynamic heat balance is to adjust the cooling water inflow and the exhaust gas inflow so that the exhaust gas temperature, the fuel gas inflow, the fuel gas temperature, the oxygen inflow, the oxygen temperature, the cooling water inflow temperature, the cooling water outflow temperature, the exhaust gas exhaust temperature, and the exhaust gas exhaust flow rate reach the target values, the exhaust gas temperature, the fuel gas inflow, the fuel gas temperature, the oxygen inflow, the oxygen temperature, the cooling water inflow temperature, the cooling water outflow temperature, the exhaust gas exhaust temperature, and the exhaust gas exhaust flow rate are determined as the main variables, and the cooling water inflow and the exhaust gas inflow are determined as the slave variables.

[0229] At this time, when executing step S102, the following steps S601-S605 may be specifically performed:

[0230] S601: Calculate the target value of exhaust gas emission quality, the target value of fuel gas inflow quality, and the target value of oxygen inflow quality based on the target value of exhaust gas emission flow rate, the target value of fuel gas inflow rate, and the target value of oxygen inflow rate.

[0231] In this embodiment, the target value of the exhaust gas flow rate and the exhaust gas density are calculated to calculate the exhaust gas mass m 尾 target value.

[0232] S602: exhaust gas mass m 尾 The target value of exhaust gas temperature t 尾 The target value is input into the following output gas heat expression to calculate the heat Q carried by the exhaust gas discharged from the exhaust emission unit. 输出The fifth tail gas calorific value:

[0233]

[0234] S603: Calculate the lost heat Q through the loss expression 损失 The fifth heat loss value, and the heat Q generated by the burner during operation is calculated through the conversion formula between kilowatts and joules and the working power of the burner. 烧嘴 The calorific value of the fifth burner.

[0235] S604: Q 输出 The fifth tail gas calorific value, Q 损失 The fifth heat loss value, Q 烧嘴 The calorific value of the fifth burner is input into the following dynamic heat balance expression to calculate the heat Q carried by the gas entering the combustion chamber 输入 The fifth gas calorific value, the heat released by the gas burning in the combustion chamber Q 反应热 The fifth released heat value and the heat absorbed by the cooling water Q 冷却 The relationship between the fifth absorbed heat value is the equation:

[0236] Q 输入 +Q 烧嘴 +Q 反应热 =Q 输出 +Q 冷却 +Q 损失

[0237] S605: According to Q 输入 The fifth gas calorific value, Q 反应热 The fifth calorific value and Q 冷却 The fifth relationship between the absorbed heat value and the exhaust gas temperature t 废 The target value of the gas inflow mass m 燃 The target value of gas temperature t 燃 Target value, oxygen inflow mass m 氧 The target value of oxygen temperature t 氧 The target value, the following input gas heat expression, reaction heat expression, cooling water expression, cooling water inflow temperature t 冷入 The target value of cooling water outlet temperature t 冷出 The target value is calculated to calculate the cooling water inflow mass m 冷 and exhaust gas inflow mass m 废 Adjustment value:

[0238] Q 输入 =C 氧 m 氧 t 氧 +C 燃 m 燃 t燃 +C 废 m 废 t 废

[0239] Q 反应热 =m 废 q 废 +m 燃 q 燃 +m 氧 q 氧

[0240] Or, Q 反应热 =m 废 ΔH 废 +m 燃 ΔH 燃 +m 氧 ΔH 氧

[0241] Q 冷却 =C 冷 m 冷 Δt 冷

[0242] Δt 冷 =t 冷出 -t 冷入

[0243] S606: According to the cooling water inflow mass m 冷 The adjustment value of the cooling water inflow is calculated according to the adjustment value of the exhaust gas inflow mass m 废 The adjustment value of the exhaust gas inflow amount is calculated by the adjustment value of .

[0244] In this embodiment, the cooling water inflow mass m 冷 The adjustment value of the cooling water inflow is calculated based on the adjustment value of the exhaust gas inflow mass m 废 The adjustment value of the exhaust gas inflow is calculated based on the adjustment value and the exhaust gas density.

[0245] In a sixth possible implementation, when executing step S101, it can be specifically performed according to the following steps: when the goal of dynamic heat balance is to adjust the exhaust gas inflow and the cooling water outflow temperature so that the exhaust gas temperature, the fuel gas inflow, the fuel gas temperature, the oxygen inflow, the oxygen temperature, the cooling water inflow temperature, the cooling water inflow, and the exhaust gas discharge temperature reach the target values, the exhaust gas temperature, the fuel gas inflow, the fuel gas temperature, the oxygen inflow, the oxygen temperature, the cooling water inflow temperature, the cooling water inflow, and the exhaust gas discharge temperature are determined as the main variables, and the exhaust gas inflow and the cooling water outflow temperature are determined as the slave variables.

[0246] At this time, when executing step S102, the following steps may be specifically performed:

[0247] S701: Calculate the target value of exhaust gas emission quality, the target value of fuel gas inflow quality, and the target value of oxygen inflow quality based on the target value of exhaust gas emission flow rate, the target value of fuel gas inflow rate, and the target value of oxygen inflow rate.

[0248] In this embodiment, the target value of the exhaust gas discharge quality can be calculated according to the target value of the exhaust gas discharge flow rate and the exhaust gas density, and the target value of the gas (fuel gas, oxygen) inflow quality can be calculated according to the target value of the gas (fuel gas, oxygen) inflow amount and the gas (fuel gas, oxygen) density.

[0249] S702: exhaust gas mass m 尾 The target value of exhaust gas temperature t 尾 The target value is input into the following output gas heat expression to calculate the heat Q carried by the exhaust gas discharged from the exhaust emission unit. 输出 The calorific value of the sixth exhaust gas.

[0250]

[0251] S703: Calculate the lost heat Q through the loss expression 损失 The sixth heat loss value, and the heat Q generated by the burner during operation is calculated through the conversion formula between kilowatts and joules and the working power of the burner. 烧嘴 The calorific value of the sixth burner.

[0252] S704: Q 输出 The sixth tail gas calorific value, Q 损失 The sixth heat loss value, Q 烧嘴 The heat value of the sixth burner is input into the following heat dynamic balance expression to calculate the heat Q carried by the gas entering the combustion chamber 输入 The sixth gas calorific value, the heat Q released by the gas burning in the combustion chamber 反应热 The sixth released heat value and the heat absorbed by the cooling water Q 冷却 The sixth equation for the relationship between the absorbed heat values;

[0253] Q 输入 +Q 烧嘴 +Q 反应热 =Q 输出 +Q 冷却 +Q 损失

[0254] S705: According to Q 输入 The sixth gas calorific value, Q 反应热 The sixth heat release value and Q 冷却 The sixth relationship between the absorbed heat value and the exhaust gas temperature t 废The target value of the gas inflow mass m 燃 The target value of gas temperature t 燃 Target value, oxygen inflow mass m 氧 The target value of oxygen temperature t 氧 Target value, input gas heat expression, reaction heat expression, cooling water expression, cooling water inflow temperature t 冷入 Target value, cooling water inflow mass m 冷 The target value is used to calculate the cooling water outlet temperature t 冷出 and exhaust gas inflow mass m 废 The adjustment value of the exhaust gas inflow mass m 废 Calculate the adjustment value of the exhaust gas inflow:

[0255] Q 输入 =C 氧 m 氧 t 氧 +C 燃 m 燃 t 燃 +C 废 m 废 t 废

[0256] Q 反应热 =m 废 q 废 +m 燃 q 燃 +m 氧 q 氧

[0257] Or, Q 反应热 =m 废 ΔH 废 +m 燃 ΔH 燃 +m 氧 ΔH 氧

[0258] Q 冷却 =C 冷 m 冷 Δt 冷

[0259] Δt 冷 =t 冷出 -t 冷入

[0260] In this embodiment, according to the exhaust gas inflow mass m 废 When calculating the adjustment value of the exhaust gas inflow, the adjustment value can be calculated by calculating the exhaust gas inflow mass m 废 The product of the adjustment value and the exhaust gas density is used to obtain the adjustment value of the exhaust gas inflow.

[0261] At this time, when executing step S103, the exhaust gas inflow amount can be adjusted according to the adjustment value of the exhaust gas inflow amount, and the cooling water outflow temperature t 冷出 Adjust the cooling water outlet temperature by adjusting the adjustment value.

[0262] Based on the same technical concept, the embodiment of the present application also provides a heat dynamic balance control system for exhaust gas treatment, such as Figure 1 As shown, the heat dynamic balance control system for exhaust gas treatment includes: a gas input pipeline, an oxygen input pipeline, an exhaust gas input pipeline, an exhaust gas combustion treatment unit, a cooling unit, an exhaust gas emission unit and the heat dynamic balance controller; the gas input pipeline and the oxygen input pipeline are both connected to the burner in the exhaust gas combustion treatment unit; the burner and the exhaust gas input pipeline are both connected to the combustion chamber in the exhaust gas combustion treatment unit; the cooling unit is respectively connected to the combustion chamber and the exhaust gas emission unit;

[0263] The burner is used to spray the gas in the gas input pipeline and the oxygen in the oxygen input pipeline into the combustion chamber, so as to assist the combustion of the exhaust gas flowing from the exhaust gas input pipeline into the combustion chamber in the combustion chamber; the cooling unit is used to absorb the heat released during the combustion of the exhaust gas and the heat of the gas itself in the combustion chamber through cooling water; the exhaust gas discharge unit is used to discharge the exhaust gas formed by the combustion reaction from the combustion chamber;

[0264] The heat dynamic balance controller is used for:

[0265] Based on the target task of heat dynamic balance, determine the main and subordinate variables in the combustion reaction process;

[0266] Determining the adjustment value of the slave variable according to the target value of the master variable and the heat dynamic balance expression;

[0267] During the combustion reaction, the slave variable is adjusted based on the adjustment value.

[0268] Optionally, the fuel gas input pipeline is provided with a first temperature controller and a first gas flow controller; the oxygen input pipeline is provided with a second temperature controller and a second gas flow controller; the exhaust gas input pipeline is provided with a third temperature controller and a gas flow meter;

[0269] The cooling unit comprises a water tank, a water inlet pipeline, and a water outlet pipeline; the water inlet pipeline and the water outlet pipeline are both connected to the water tank; the water inlet pipeline is provided with an inlet water temperature controller and an inlet water flow controller; the water outlet pipeline is provided with an outlet water temperature controller and an outlet water flow controller;

[0270] The combustion chamber is communicated with the water tank, and the water tank is located below the combustion chamber; a first spray device is provided on the inner wall of the combustion chamber close to the water tank; the first spray device is used to absorb cooling water in the water tank and spray cooling water into the combustion chamber, so as to absorb the heat released during the combustion of the exhaust gas and the heat of the gas in the combustion chamber through the sprayed cooling water; the water tank is used to collect the cooling water sprayed by the first spray device;

[0271] The exhaust gas emission unit includes an exhaust gas emission pipeline and a water-cooled spray tower; a gas temperature monitor is arranged on the exhaust gas emission pipeline; the water-cooled spray tower is communicated with the exhaust gas emission pipeline and the water tank respectively, and the water tank is located below the water-cooled spray tower; the combustion chamber is communicated with the water-cooled spray tower through the water tank, and the exhaust gas in the combustion chamber flows into the water-cooled spray tower through the water tank and is discharged from the exhaust gas emission pipeline;

[0272] A second spray device is arranged on the inner wall of the water-cooled spray tower close to the water tank; the second spray device is used to absorb cooling water in the water tank and spray cooling water into the water-cooled spray tower to absorb heat in the exhaust gas through the sprayed cooling water.

[0273] Optionally, the heat dynamic balance expression is:

[0274] Q 输入 +Q 烧嘴 +Q 反应热 =Q 输出 +Q 冷却 +Q 损失

[0275] Among them, Q 输入 Indicates the heat carried by the gas entering the combustion chamber; Q 烧嘴 Indicates the heat generated by the burner during operation; Q 反应热 represents the heat released by the combustion of gas in the combustion chamber; Q 输出 represents the heat carried by the exhaust gas discharged by the exhaust gas emission unit; Q 冷却 Indicates the heat absorbed by cooling water; Q 损失 Indicates the amount of heat lost;

[0276] The heat carried by the gas entering the combustion chamber is calculated by the following input gas heat expression:

[0277] Q 输入 =C 氧 m 氧 t 氧 +C 燃 m 燃 t 燃 +C废 m 废 t 废

[0278] Among them, C 氧 represents the specific heat capacity of oxygen; m 氧 represents the mass of oxygen entering the combustion chamber; t 氧 represents the temperature of the oxygen entering the combustion chamber; C 燃 Indicates the specific heat capacity of the gas; m 燃 Indicates the mass of the gas entering the combustion chamber; t 燃 Indicates the temperature of the gas entering the combustion chamber; C 废 Indicates the specific heat capacity of the exhaust gas; m 废 represents the mass of the exhaust gas entering the combustion chamber; t 废 represents the temperature of the exhaust gas entering the combustion chamber;

[0279] The heat generated by the burner during operation is calculated using the conversion formula between kilowatts and joules and the operating power of the burner;

[0280] The heat released by the combustion of the gas in the combustion chamber is calculated by the following reaction heat expression:

[0281] Q 反应热 =m 废 q 废 +m 燃 q 燃 +m 氧 q 氧

[0282] Or, Q 反应热 =m 废 ΔH 废 +m 燃 ΔH 燃 +m 氧 ΔH 氧

[0283] Among them, m 废 Indicates the mass of the exhaust gas from combustion; m 燃 Indicates the mass of the gas burned; m 氧 Indicates the mass of oxygen burned; q 废 Indicates the calorific value of the exhaust gas from combustion; q 燃 Indicates the calorific value of the burning gas; q 氧 Indicates the calorific value of the oxygen being burned; ΔH 废 Indicates the heat of combustion or enthalpy change of the exhaust gas; ΔH 燃 Indicates the heat of combustion or enthalpy change of the burning gas; ΔH 氧 It represents the heat of combustion or enthalpy change of the burning oxygen;

[0284] The heat carried by the tail gas discharged by the tail gas discharge unit is calculated by the following output gas heat expression:

[0285]

[0286] Where n represents the number of types of gases contained in the exhaust gas; C 尾 Indicates the specific heat capacity of the exhaust gas; m 尾 Indicates the mass of exhaust gas; t 尾 Indicates the temperature of the exhaust gas;

[0287] The heat absorbed by the cooling water is calculated using the following cooling water expression:

[0288] Q 冷却 =C 冷 m 冷 Δt 冷

[0289] Among them, C 冷 Represents the specific heat capacity of cooling water; m 冷 Indicates the mass of cooling water flowing into the water tank; Δt 冷 represents the temperature difference between the temperature of the cooling water entering the water tank and the temperature of the cooling water flowing out of the water tank;

[0290] The heat loss is calculated using the following loss expression:

[0291] Q 损失 =A 腔 a r腔 (t w腔 -t a腔 )τ+A 塔 a r塔 (t w塔 -t a塔 )τ

[0292] Among them, A 腔 represents the surface area of ​​the inner wall of the combustion chamber; a r腔 represents the combined heat transfer coefficient of the combustion chamber inner wall to the air; t w腔 represents the inner wall temperature of the combustion chamber; t a腔 represents the temperature of the environment in which the combustion chamber is located; τ represents the time of the combustion reaction; A 塔 represents the surface area of ​​the inner wall of the water-cooled spray tower; a r塔 represents the combined heat transfer coefficient of the inner wall of the water-cooled spray tower to the air; t w塔 represents the inner wall temperature of the water-cooled spray tower; t a塔 Indicates the temperature of the environment in which the water-cooled spray tower is located.

[0293] Optionally, when the heat dynamic balance controller is used to determine the main variable and the subordinate variable in the combustion reaction process based on the target task of heat dynamic balance, it is specifically used to:

[0294] When the goal of the dynamic balance of heat is to adjust the cooling water inflow and cooling water outflow temperature so that the exhaust gas inflow, exhaust gas temperature, fuel gas inflow, fuel gas temperature, oxygen inflow, oxygen temperature, cooling water inflow temperature, exhaust gas exhaust temperature, and exhaust gas exhaust flow rate reach the target values, the exhaust gas inflow, exhaust gas temperature, fuel gas inflow, fuel gas temperature, oxygen inflow, oxygen temperature, cooling water inflow temperature, exhaust gas exhaust temperature, and exhaust gas exhaust flow rate are determined as the main variables, and the cooling water inflow and cooling water outflow temperature are determined as the dependent variables;

[0295] The heat dynamic balance controller, when used to determine the adjustment value of the slave variable according to the target value of the master variable and the heat dynamic balance expression, is specifically used to:

[0296] According to the target value of the exhaust gas inflow, the target value of the fuel gas inflow, the target value of the oxygen inflow, and the target value of the exhaust gas discharge flow rate, the target value of the exhaust gas quality, the target value of the fuel gas quality, the target value of the oxygen quality, and the target value of the exhaust gas discharge quality are determined respectively;

[0297] Inputting the target value of exhaust gas quality, the target value of fuel gas quality, the target value of oxygen quality, the target value of exhaust gas temperature, the target value of fuel gas temperature, and the target value of oxygen temperature into the input gas heat expression, and calculating the first gas heat value of the heat carried by the gas itself entering the combustion chamber;

[0298] Inputting the target value of the exhaust gas quality, the target value of the fuel gas quality, and the target value of the oxygen quality into the reaction heat expression, and calculating the first released heat value of the heat released by the combustion of the gas in the combustion chamber;

[0299] Inputting a target value of the exhaust gas exhaust temperature and a target value of the exhaust gas exhaust quality into the gas heat expression to calculate a first exhaust gas heat value of the heat carried by the exhaust gas discharged by the exhaust gas emission unit;

[0300] A first lost heat value of the lost heat is calculated by the loss expression, and a first burner heat value of the heat generated by the burner during operation is calculated by a conversion formula between kilowatts and joules and the working power of the burner;

[0301] Inputting the first gas calorific value, the first released calorific value, the first lost calorific value, the first burner calorific value and the first tail gas calorific value into the heat dynamic balance expression to calculate the first absorbed calorific value of the heat absorbed by the cooling water;

[0302] The first absorbed heat value and the target value of the cooling water inlet temperature are input into the cooling water expression, the adjustment values ​​of the cooling water quality and the cooling water outflow temperature are calculated, and the adjustment value of the cooling water inflow amount is determined according to the adjustment value of the cooling water quality.

[0303] Optionally, when the heat dynamic balance controller is used to determine the main variable and the subordinate variable in the combustion reaction process based on the target task of heat dynamic balance, it is specifically used to:

[0304] When the goal of the dynamic balance of heat is to adjust the exhaust gas discharge temperature and the cooling water inflow so that the exhaust gas inflow, exhaust gas temperature, fuel gas inflow, fuel gas temperature, oxygen inflow, oxygen temperature, cooling water inflow temperature, cooling water outflow temperature, and exhaust gas discharge flow rate reach the target values, the exhaust gas inflow, exhaust gas temperature, fuel gas inflow, fuel gas temperature, oxygen inflow, oxygen temperature, cooling water inflow temperature, cooling water outflow temperature, and exhaust gas discharge flow rate are determined as the main variables, and the exhaust gas discharge temperature and cooling water inflow are determined as the slave variables;

[0305] The heat dynamic balance controller, when used to determine the adjustment value of the slave variable according to the target value of the master variable and the heat dynamic balance expression, is specifically used to:

[0306] According to the target value of the exhaust gas inflow, the target value of the fuel gas inflow, the target value of the oxygen inflow, and the target value of the exhaust gas discharge flow rate, the target value of the exhaust gas quality, the target value of the fuel gas quality, the target value of the oxygen quality, and the target value of the exhaust gas discharge quality are determined respectively;

[0307] Inputting the target value of exhaust gas quality, the target value of fuel gas quality, the target value of oxygen quality, the target value of exhaust gas temperature, the target value of fuel gas temperature, and the target value of oxygen temperature into the input gas heat expression, and calculating the second gas heat value of the heat carried by the gas itself entering the combustion chamber;

[0308] Inputting the target value of the exhaust gas quality, the target value of the fuel gas quality, and the target value of the oxygen quality into the reaction heat expression to calculate a second released heat value of the heat released by the combustion of the gas in the combustion chamber;

[0309] A second lost heat value of the lost heat is calculated by the loss expression, and a second burner heat value of the heat generated by the burner during operation is calculated by a conversion formula between kilowatts and joules and the working power of the burner;

[0310] Input the second gas calorific value, the second released calorific value, the second lost calorific value and the second burner calorific value into the heat dynamic balance expression, and calculate the sum of the second tail gas calorific value of the heat carried by the tail gas discharged by the tail gas discharge unit and the second absorbed calorific value of the heat absorbed by the cooling water;

[0311] According to the output gas heat expression, the cooling water expression, the sum of the second exhaust gas heat value and the second absorbed heat value, the target value of the exhaust gas discharge quality, the target value of the cooling water inflow temperature, and the target value of the cooling water outflow temperature, the adjustment values ​​of the exhaust gas discharge temperature and the cooling water inflow quality are calculated, and the adjustment value of the cooling water inflow amount is calculated according to the adjustment value of the cooling water inflow quality.

[0312] Optionally, when the heat dynamic balance controller is used to determine the main variable and the subordinate variable in the combustion reaction process based on the target task of heat dynamic balance, it is specifically used to:

[0313] When the goal of the dynamic balance of heat is to adjust the exhaust gas discharge temperature and the cooling water outflow temperature so that the exhaust gas inflow, exhaust gas temperature, fuel gas inflow, fuel gas temperature, oxygen inflow, oxygen temperature, cooling water inflow temperature, cooling water inflow, and exhaust gas discharge flow rate reach the target values, the exhaust gas inflow, exhaust gas temperature, fuel gas inflow, fuel gas temperature, oxygen inflow, oxygen temperature, cooling water inflow temperature, cooling water inflow, and exhaust gas discharge flow rate are determined as the main variables, and the exhaust gas discharge temperature and the cooling water outflow temperature are determined as the dependent variables;

[0314] The heat dynamic balance controller, when used to determine the adjustment value of the slave variable according to the target value of the master variable and the heat dynamic balance expression, is specifically used to:

[0315] According to the target value of the exhaust gas inflow, the target value of the fuel gas inflow, the target value of the oxygen inflow, the target value of the exhaust gas discharge flow rate, and the target value of the cooling water inflow, the target value of the exhaust gas quality, the target value of the fuel gas quality, the target value of the oxygen quality, the target value of the exhaust gas discharge quality, and the target value of the cooling water inflow quality are determined respectively;

[0316] Inputting the target value of exhaust gas quality, the target value of fuel gas quality, the target value of oxygen quality, the target value of exhaust gas temperature, the target value of fuel gas temperature, and the target value of oxygen temperature into the input gas heat expression, and calculating the third gas heat value of the heat carried by the gas itself entering the combustion chamber;

[0317] Inputting the target value of the exhaust gas quality, the target value of the fuel gas quality, and the target value of the oxygen quality into the reaction heat expression, and calculating the third released heat value of the heat released by the combustion of the gas in the combustion chamber;

[0318] A third lost heat value of the lost heat is calculated by the loss expression, and a third burner heat value of the heat generated by the burner during operation is calculated by a conversion formula between kilowatts and joules and the working power of the burner;

[0319] Input the third gas calorific value, the third released calorific value, the third lost calorific value and the third burner calorific value into the heat dynamic balance expression, and calculate the sum of the third tail gas calorific value of the heat carried by the tail gas discharged by the tail gas discharge unit and the third absorbed calorific value of the heat absorbed by the cooling water;

[0320] According to the output gas heat expression, the cooling water expression, the sum of the third exhaust gas heat value and the third absorbed heat value, the target value of the cooling water inflow temperature, the target value of the cooling water inflow quality, and the target value of the exhaust gas discharge quality, the adjustment values ​​of the exhaust gas discharge temperature and the cooling water outflow temperature are calculated.

[0321] Optionally, when the heat dynamic balance controller is used to determine the main variable and the subordinate variable in the combustion reaction process based on the target task of heat dynamic balance, it is specifically used to:

[0322] When the goal of the dynamic balance of heat is to adjust the exhaust gas temperature and the exhaust gas inflow so that the exhaust gas temperature, the fuel gas inflow, the fuel gas temperature, the oxygen inflow, the oxygen temperature, the cooling water inflow temperature, the cooling water inflow, the cooling water outflow temperature, and the exhaust gas flow rate reach the target values, the exhaust gas temperature, the fuel gas inflow, the fuel gas temperature, the oxygen inflow, the oxygen temperature, the cooling water inflow temperature, the cooling water inflow, the cooling water outflow temperature, and the exhaust gas flow rate are determined as the main variables, and the exhaust gas temperature and the exhaust gas inflow are determined as the dependent variables;

[0323] Optionally, when the heat dynamic balance controller is used to determine the adjustment value of the slave variable according to the target value of the master variable and the heat dynamic balance expression, it is specifically used to:

[0324] Calculate the target value of cooling water inflow quality, the target value of exhaust gas discharge quality, the target value of fuel gas inflow quality, and the target value of oxygen inflow quality according to the target value of cooling water inflow, the target value of exhaust gas discharge flow rate, the target value of fuel gas inflow, and the target value of oxygen inflow;

[0325] calculating a fourth absorbed heat value of heat absorbed by the cooling water based on a target value of the cooling water inflow temperature, a target value of the cooling water inflow quality, a target value of the cooling water outflow temperature, and a cooling water expression;

[0326] A fourth lost heat value of the lost heat is calculated by the loss expression, and a fourth burner heat value of the heat generated by the burner during operation is calculated by a conversion formula between kilowatts and joules and the working power of the burner;

[0327] The fourth absorbed heat value, the fourth lost heat value, and the fourth burner heat value are input into the heat dynamic balance expression, and the equation relationship among the fourth gas heat value of the heat carried by the gas itself entering the combustion chamber, the fourth released heat value of the heat released by the combustion of the gas in the combustion chamber, and the fourth tail gas heat value of the heat carried by the tail gas discharged by the tail gas discharge unit is calculated;

[0328] According to the equation relationship between the fourth gas calorific value, the fourth released calorific value, and the fourth exhaust gas calorific value, as well as according to the target value of exhaust gas temperature, the target value of fuel gas inflow mass, the target value of fuel gas temperature, the target value of oxygen inflow mass, the target value of oxygen temperature, the target value of exhaust gas discharge mass, the reaction heat expression, the input gas calorific expression, and the output gas calorific expression, the adjustment values ​​of exhaust gas discharge temperature and exhaust gas inflow mass are calculated, and according to the adjustment value of exhaust gas inflow mass, the adjustment value of exhaust gas inflow amount is calculated.

[0329] Optionally, when the heat dynamic balance controller is used to determine the main variable and the subordinate variable in the combustion reaction process based on the target task of heat dynamic balance, it is specifically used to:

[0330] When the goal of the dynamic balance of heat is to adjust the cooling water inflow and the exhaust gas inflow so that the exhaust gas temperature, the fuel gas inflow, the fuel gas temperature, the oxygen inflow, the oxygen temperature, the cooling water inflow temperature, the cooling water outflow temperature, the exhaust gas discharge temperature, and the exhaust gas discharge flow rate reach the target values, the exhaust gas temperature, the fuel gas inflow, the fuel gas temperature, the oxygen inflow, the oxygen temperature, the cooling water inflow temperature, the cooling water outflow temperature, the exhaust gas discharge temperature, and the exhaust gas discharge flow rate are determined as the main variables, and the cooling water inflow and the exhaust gas inflow are determined as the dependent variables;

[0331] The heat dynamic balance controller, when used to determine the adjustment value of the slave variable according to the target value of the master variable and the heat dynamic balance expression, is specifically used to:

[0332] Calculate the target value of exhaust gas discharge quality, the target value of fuel gas inflow quality, and the target value of oxygen inflow quality according to the target value of exhaust gas discharge flow rate, the target value of fuel gas inflow amount, and the target value of oxygen inflow amount;

[0333] Inputting the target value of exhaust gas discharge quality and the target value of exhaust gas discharge temperature into the output gas heat expression, and calculating the fifth exhaust gas heat value of the heat carried by the exhaust gas discharged by the exhaust gas discharge unit;

[0334] A fifth lost heat value of the lost heat is calculated by the loss expression, and a fifth burner heat value of the heat generated by the burner during operation is calculated by a conversion formula between kilowatts and joules and the working power of the burner;

[0335] The fifth tail gas calorific value, the fifth loss calorific value, and the fifth burner calorific value are input into the heat dynamic balance expression to calculate the relationship between the fifth gas calorific value of the heat carried by the gas entering the combustion chamber, the fifth released calorific value of the heat released by the combustion of the gas in the combustion chamber, and the fifth absorbed calorific value of the heat absorbed by the cooling water;

[0336] Calculate adjustment values ​​of cooling water inflow mass and exhaust gas inflow mass according to the relationship equation among the fifth gas calorific value, the fifth released calorific value and the fifth absorbed calorific value, the target value of exhaust gas temperature, the target value of fuel gas inflow mass, the target value of fuel gas temperature, the target value of oxygen inflow mass, the target value of oxygen temperature, the input gas calorific value expression, the reaction heat expression, the cooling water expression, the target value of cooling water inflow temperature, and the target value of cooling water outflow temperature;

[0337] An adjustment value of the cooling water inflow amount is calculated based on the adjustment value of the cooling water inflow mass, and an adjustment value of the exhaust gas inflow amount is calculated based on the adjustment value of the exhaust gas inflow mass.

[0338] Optionally, when the heat dynamic balance controller is used to determine the main variable and the subordinate variable in the combustion reaction process based on the target task of heat dynamic balance, it is specifically used to:

[0339] When the goal of the dynamic balance of heat is to adjust the exhaust gas inflow and cooling water outflow temperature so that the exhaust gas temperature, fuel gas inflow, fuel gas temperature, oxygen inflow, oxygen temperature, cooling water inflow temperature, cooling water inflow, and tail gas discharge temperature reach the target values, the exhaust gas temperature, fuel gas inflow, fuel gas temperature, oxygen inflow, oxygen temperature, cooling water inflow temperature, cooling water inflow, and tail gas discharge temperature are determined as the main variables, and the exhaust gas inflow and cooling water outflow temperature are determined as the dependent variables;

[0340] The heat dynamic balance controller, when used to determine the adjustment value of the slave variable according to the target value of the master variable and the heat dynamic balance expression, is specifically used to:

[0341] Calculate the target value of exhaust gas discharge quality, the target value of fuel gas inflow quality, and the target value of oxygen inflow quality according to the target value of exhaust gas discharge flow rate, the target value of fuel gas inflow amount, and the target value of oxygen inflow amount;

[0342] Inputting the target value of the exhaust gas discharge quality and the target value of the exhaust gas discharge temperature into the output gas heat expression, and calculating the sixth exhaust gas heat value of the heat carried by the exhaust gas discharged by the exhaust gas discharge unit;

[0343] A sixth lost heat value of the lost heat is calculated by the loss expression, and a sixth burner heat value of the heat generated by the burner during operation is calculated by a conversion formula between kilowatts and joules and the working power of the burner;

[0344] Input the sixth tail gas calorific value, the sixth loss calorific value, and the sixth burner calorific value into the heat dynamic balance expression, and calculate the relationship equation between the sixth gas calorific value of the heat carried by the gas entering the combustion chamber, the sixth released calorific value of the heat released by the combustion of the gas in the combustion chamber, and the sixth absorbed calorific value of the heat absorbed by the cooling water;

[0345] According to the relationship equation among the sixth gas calorific value, the sixth released calorific value and the sixth absorbed calorific value, the target value of the exhaust gas temperature, the target value of the fuel gas inflow mass, the target value of the fuel gas temperature, the target value of the oxygen inflow mass, the target value of the oxygen temperature, the input gas calorific value expression, the reaction heat expression, the cooling water expression, the target value of the cooling water inflow temperature, and the target value of the cooling water inflow mass, the adjustment values ​​of the cooling water outlet temperature and the exhaust gas inflow mass are calculated, and the adjustment value of the exhaust gas inflow amount is calculated based on the adjustment value of the exhaust gas inflow mass.

[0346] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0347] In the several embodiments provided in the present application, it should be understood that the disclosed methods and systems can be implemented in other ways. The system embodiments described above are merely schematic. For example, the division of the modules is only a logical function division. There may be other division methods in actual implementation. For example, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some communication interface, device or module, which can be electrical, mechanical or other forms.

[0348] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0349] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0350] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that is executable by a processor. Based on this understanding, the technical solution of the present application can essentially be embodied in the form of a software product, or in other words, the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0351] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A method for controlling the dynamic balance of heat in waste gas treatment, characterized in that: The heat dynamic balance control method for waste gas treatment is applied to a heat dynamic balance controller in a heat dynamic balance control system for waste gas treatment; the heat dynamic balance control system for waste gas treatment comprises: a gas input pipeline, an oxygen input pipeline, a waste gas input pipeline, a waste gas combustion treatment unit, a cooling unit, a tail gas emission unit and the heat dynamic balance controller; the gas input pipeline and the oxygen input pipeline are both connected to the burner in the waste gas combustion treatment unit; the burner and the waste gas input pipeline are both connected to the combustion chamber in the waste gas combustion treatment unit; the cooling unit is respectively connected to the combustion chamber and the tail gas emission unit; The burner is used to spray the gas in the gas input pipeline and the oxygen in the oxygen input pipeline into the combustion chamber, so as to assist the combustion of the exhaust gas flowing from the exhaust gas input pipeline into the combustion chamber in the combustion chamber; the cooling unit is used to absorb the heat released during the combustion of the exhaust gas and the heat of the gas itself in the combustion chamber through cooling water; the exhaust gas discharge unit is used to discharge the exhaust gas formed by the combustion reaction from the combustion chamber; The method comprises: Based on the target task of heat dynamic balance, determine the main and subordinate variables in the combustion reaction process; Determining the adjustment value of the slave variable according to the target value of the master variable and the heat dynamic balance expression; During the combustion reaction, the slave variable is adjusted based on the adjustment value.

2. The method according to claim 1, characterized in that: The fuel gas input pipeline is provided with a first temperature controller and a first gas flow controller; the oxygen input pipeline is provided with a second temperature controller and a second gas flow controller; the exhaust gas input pipeline is provided with a third temperature controller and a gas flow meter; The cooling unit comprises a water tank, a water inlet pipeline, and a water outlet pipeline; the water inlet pipeline and the water outlet pipeline are both connected to the water tank; the water inlet pipeline is provided with an inlet water temperature controller and an inlet water flow controller; the water outlet pipeline is provided with an outlet water temperature controller and an outlet water flow controller; The combustion chamber is communicated with the water tank, and the water tank is located below the combustion chamber; a first spray device is provided on the inner wall of the combustion chamber close to the water tank; the first spray device is used to absorb cooling water in the water tank and spray cooling water into the combustion chamber, so as to absorb the heat released during the combustion of the exhaust gas and the heat of the gas in the combustion chamber through the sprayed cooling water; the water tank is used to collect the cooling water sprayed by the first spray device; The exhaust gas emission unit includes an exhaust gas emission pipeline and a water-cooled spray tower; a gas temperature monitor is arranged on the exhaust gas emission pipeline; the water-cooled spray tower is communicated with the exhaust gas emission pipeline and the water tank respectively, and the water tank is located below the water-cooled spray tower; the combustion chamber is communicated with the water-cooled spray tower through the water tank, and the exhaust gas in the combustion chamber flows into the water-cooled spray tower through the water tank and is discharged from the exhaust gas emission pipeline; A second spray device is arranged on the inner wall of the water-cooled spray tower close to the water tank; the second spray device is used to absorb cooling water in the water tank and spray cooling water into the water-cooled spray tower to absorb heat in the exhaust gas through the sprayed cooling water.

3. The method according to claim 2, characterized in that: The heat dynamic balance expression is: Q 输入 +Q 烧嘴 +Q 反应热 =Q 输出 +Q 冷却 +Q 损失 Among them, Q 输入 Indicates the heat carried by the gas entering the combustion chamber; Q 烧嘴 Indicates the heat generated by the burner during operation; Q 反应热 represents the heat released by the combustion of gas in the combustion chamber; Q 输出 represents the heat carried by the exhaust gas discharged by the exhaust gas emission unit; Q 冷却 Indicates the heat absorbed by cooling water; Q 损失 Indicates the amount of heat lost; The heat carried by the gas entering the combustion chamber is calculated by the following input gas heat expression: Q 输入 =C 氧 m 氧 t 氧 +C 燃 m 燃 t 燃 +C 废 m 废 t 废 Among them, C 氧 represents the specific heat capacity of oxygen; m 氧 represents the mass of oxygen entering the combustion chamber; t 氧 represents the temperature of the oxygen entering the combustion chamber; C 燃 Indicates the specific heat capacity of the gas; m 燃 Indicates the mass of the gas entering the combustion chamber; t 燃 Indicates the temperature of the gas entering the combustion chamber; C 废 Indicates the specific heat capacity of the exhaust gas; m 废 represents the mass of the exhaust gas entering the combustion chamber; t 废 represents the temperature of the exhaust gas entering the combustion chamber; The heat generated by the burner during operation is calculated using the conversion formula between kilowatts and joules and the operating power of the burner; The heat released by the combustion of the gas in the combustion chamber is calculated by the following reaction heat expression: Q 反应热 =m 废 q 废 +m 燃 q 燃 +m 氧 q 氧 Alternatively, Q 反应热 = m 废 ΔH 废 + m 燃 ΔH 燃 + m 氧 ΔH 氧 Among them, m 废 Indicates the mass of the exhaust gas from combustion; m 燃 Indicates the mass of the gas burned; m 氧 Indicates the mass of oxygen burned; q 废 Indicates the calorific value of the exhaust gas from combustion; q 燃 Indicates the calorific value of the burning gas; q 氧 Indicates the calorific value of oxygen burning; ΔH 废 Indicates the heat of combustion or enthalpy change of the exhaust gas; ΔH 燃 Indicates the heat of combustion or enthalpy change of the burning gas; ΔH 氧 It represents the heat of combustion or enthalpy change of the burning oxygen; The heat carried by the tail gas discharged by the tail gas discharge unit is calculated by the following output gas heat expression: Where n represents the number of types of gases contained in the exhaust gas; C 尾 Indicates the specific heat capacity of the exhaust gas; m 尾 Indicates the mass of exhaust gas; t 尾 Indicates the temperature of the exhaust gas; The heat absorbed by the cooling water is calculated using the following cooling water expression: Q 冷却 =C 冷 m 冷 Δt 冷 Among them, C 冷 Represents the specific heat capacity of cooling water; m 冷 Indicates the mass of cooling water flowing into the water tank; Δt 冷 represents the temperature difference between the temperature of the cooling water entering the water tank and the temperature of the cooling water flowing out of the water tank; The heat loss is calculated using the following loss expression: Q 损失 =A 腔 a r腔 (t w腔 -t a腔 )τ+A 塔 a r塔 (t w塔 -t a塔 )τ Among them, A 腔 represents the surface area of ​​the inner wall of the combustion chamber; a r腔 represents the combined heat transfer coefficient of the combustion chamber inner wall to the air; t w腔 represents the inner wall temperature of the combustion chamber; t a腔 represents the temperature of the environment in which the combustion chamber is located; τ represents the time of the combustion reaction; A 塔 represents the surface area of ​​the inner wall of the water-cooled spray tower; a r塔 represents the combined heat transfer coefficient of the inner wall of the water-cooled spray tower to the air; t w塔 represents the inner wall temperature of the water-cooled spray tower; t a塔 Indicates the temperature of the environment in which the water-cooled spray tower is located.

4. The method according to claim 3, characterized in that: The target task based on the dynamic balance of heat determines the main variables and the subordinate variables in the combustion reaction process, including: When the goal of the dynamic balance of heat is to adjust the cooling water inflow and cooling water outflow temperature so that the exhaust gas inflow, exhaust gas temperature, fuel gas inflow, fuel gas temperature, oxygen inflow, oxygen temperature, cooling water inflow temperature, exhaust gas exhaust temperature, and exhaust gas exhaust flow rate reach the target values, the exhaust gas inflow, exhaust gas temperature, fuel gas inflow, fuel gas temperature, oxygen inflow, oxygen temperature, cooling water inflow temperature, exhaust gas exhaust temperature, and exhaust gas exhaust flow rate are determined as the main variables, and the cooling water inflow and cooling water outflow temperature are determined as the dependent variables; Determining the adjustment value of the slave variable according to the target value of the master variable and the heat dynamic balance expression includes: According to the target value of the exhaust gas inflow, the target value of the fuel gas inflow, the target value of the oxygen inflow, and the target value of the exhaust gas discharge flow rate, the target value of the exhaust gas quality, the target value of the fuel gas quality, the target value of the oxygen quality, and the target value of the exhaust gas discharge quality are determined respectively; Inputting the target value of exhaust gas quality, the target value of fuel gas quality, the target value of oxygen quality, the target value of exhaust gas temperature, the target value of fuel gas temperature, and the target value of oxygen temperature into the input gas heat expression, and calculating the first gas heat value of the heat carried by the gas itself entering the combustion chamber; Inputting the target value of the exhaust gas quality, the target value of the fuel gas quality, and the target value of the oxygen quality into the reaction heat expression, and calculating the first released heat value of the heat released by the combustion of the gas in the combustion chamber; Inputting a target value of the exhaust gas exhaust temperature and a target value of the exhaust gas exhaust quality into the gas heat expression to calculate a first exhaust gas heat value of the heat carried by the exhaust gas discharged by the exhaust gas emission unit; A first lost heat value of the lost heat is calculated by the loss expression, and a first burner heat value of the heat generated by the burner during operation is calculated by a conversion formula between kilowatts and joules and the working power of the burner; Inputting the first gas calorific value, the first released calorific value, the first lost calorific value, the first burner calorific value and the first tail gas calorific value into the heat dynamic balance expression to calculate the first absorbed calorific value of the heat absorbed by the cooling water; The first absorbed heat value and the target value of the cooling water inlet temperature are input into the cooling water expression, the adjustment values ​​of the cooling water quality and the cooling water outflow temperature are calculated, and the adjustment value of the cooling water inflow amount is determined according to the adjustment value of the cooling water quality.

5. The method according to claim 3, characterized in that: The target task based on the dynamic balance of heat determines the main variables and the subordinate variables in the combustion reaction process, including: When the goal of the dynamic balance of heat is to adjust the exhaust gas discharge temperature and the cooling water inflow so that the exhaust gas inflow, exhaust gas temperature, fuel gas inflow, fuel gas temperature, oxygen inflow, oxygen temperature, cooling water inflow temperature, cooling water outflow temperature, and exhaust gas discharge flow rate reach the target values, the exhaust gas inflow, exhaust gas temperature, fuel gas inflow, fuel gas temperature, oxygen inflow, oxygen temperature, cooling water inflow temperature, cooling water outflow temperature, and exhaust gas discharge flow rate are determined as the main variables, and the exhaust gas discharge temperature and cooling water inflow are determined as the slave variables; Determining the adjustment value of the slave variable according to the target value of the master variable and the heat dynamic balance expression includes: According to the target value of the exhaust gas inflow, the target value of the fuel gas inflow, the target value of the oxygen inflow, and the target value of the exhaust gas discharge flow rate, the target value of the exhaust gas quality, the target value of the fuel gas quality, the target value of the oxygen quality, and the target value of the exhaust gas discharge quality are determined respectively; Inputting the target value of exhaust gas quality, the target value of fuel gas quality, the target value of oxygen quality, the target value of exhaust gas temperature, the target value of fuel gas temperature, and the target value of oxygen temperature into the input gas heat expression, and calculating the second gas heat value of the heat carried by the gas itself entering the combustion chamber; Inputting the target value of the exhaust gas quality, the target value of the fuel gas quality, and the target value of the oxygen quality into the reaction heat expression, and calculating the second released heat value of the heat released by the combustion of the gas in the combustion chamber; A second lost heat value of the lost heat is calculated by the loss expression, and a second burner heat value of the heat generated by the burner during operation is calculated by a conversion formula between kilowatts and joules and the working power of the burner; Input the second gas calorific value, the second released calorific value, the second lost calorific value and the second burner calorific value into the heat dynamic balance expression, and calculate the sum of the second tail gas calorific value of the heat carried by the tail gas discharged by the tail gas discharge unit and the second absorbed calorific value of the heat absorbed by the cooling water; According to the output gas heat expression, the cooling water expression, the sum of the second exhaust gas heat value and the second absorbed heat value, the target value of the exhaust gas discharge quality, the target value of the cooling water inflow temperature, and the target value of the cooling water outflow temperature, the adjustment values ​​of the exhaust gas discharge temperature and the cooling water inflow quality are calculated, and the adjustment value of the cooling water inflow amount is calculated according to the adjustment value of the cooling water inflow quality.

6. The method according to claim 3, characterized in that: The target task based on the dynamic balance of heat determines the main variables and the subordinate variables in the combustion reaction process, including: When the goal of the dynamic balance of heat is to adjust the exhaust gas discharge temperature and the cooling water outflow temperature so that the exhaust gas inflow, exhaust gas temperature, fuel gas inflow, fuel gas temperature, oxygen inflow, oxygen temperature, cooling water inflow temperature, cooling water inflow, and exhaust gas discharge flow rate reach the target values, the exhaust gas inflow, exhaust gas temperature, fuel gas inflow, fuel gas temperature, oxygen inflow, oxygen temperature, cooling water inflow temperature, cooling water inflow, and exhaust gas discharge flow rate are determined as the main variables, and the exhaust gas discharge temperature and the cooling water outflow temperature are determined as the dependent variables; Determining the adjustment value of the slave variable according to the target value of the master variable and the heat dynamic balance expression includes: According to the target value of the exhaust gas inflow, the target value of the fuel gas inflow, the target value of the oxygen inflow, the target value of the exhaust gas discharge flow rate, and the target value of the cooling water inflow, the target value of the exhaust gas quality, the target value of the fuel gas quality, the target value of the oxygen quality, the target value of the exhaust gas discharge quality, and the target value of the cooling water inflow quality are determined respectively; Inputting the target value of exhaust gas quality, the target value of fuel gas quality, the target value of oxygen quality, the target value of exhaust gas temperature, the target value of fuel gas temperature, and the target value of oxygen temperature into the input gas heat expression, and calculating the third gas heat value of the heat carried by the gas itself entering the combustion chamber; Inputting the target value of the exhaust gas quality, the target value of the fuel gas quality, and the target value of the oxygen quality into the reaction heat expression, and calculating the third released heat value of the heat released by the combustion of the gas in the combustion chamber; A third lost heat value of the lost heat is calculated by the loss expression, and a third burner heat value of the heat generated by the burner during operation is calculated by a conversion formula between kilowatts and joules and the working power of the burner; Input the third gas calorific value, the third released calorific value, the third lost calorific value and the third burner calorific value into the heat dynamic balance expression, and calculate the sum of the third tail gas calorific value of the heat carried by the tail gas discharged by the tail gas discharge unit and the third absorbed calorific value of the heat absorbed by the cooling water; According to the output gas heat expression, the cooling water expression, the sum of the third exhaust gas heat value and the third absorbed heat value, the target value of the cooling water inflow temperature, the target value of the cooling water inflow quality, and the target value of the exhaust gas discharge quality, the adjustment values ​​of the exhaust gas discharge temperature and the cooling water outflow temperature are calculated.

7. The method according to claim 3, characterized in that: The target task based on the dynamic balance of heat determines the main variables and the subordinate variables in the combustion reaction process, including: When the goal of the dynamic balance of heat is to adjust the exhaust gas temperature and the exhaust gas inflow so that the exhaust gas temperature, the fuel gas inflow, the fuel gas temperature, the oxygen inflow, the oxygen temperature, the cooling water inflow temperature, the cooling water inflow, the cooling water outflow temperature, and the exhaust gas flow rate reach the target values, the exhaust gas temperature, the fuel gas inflow, the fuel gas temperature, the oxygen inflow, the oxygen temperature, the cooling water inflow temperature, the cooling water inflow, the cooling water outflow temperature, and the exhaust gas flow rate are determined as the main variables, and the exhaust gas temperature and the exhaust gas inflow are determined as the dependent variables; Determining the adjustment value of the slave variable according to the target value of the master variable and the heat dynamic balance expression includes: Calculate the target value of cooling water inflow quality, the target value of exhaust gas discharge quality, the target value of fuel gas inflow quality, and the target value of oxygen inflow quality according to the target value of cooling water inflow, the target value of exhaust gas discharge flow rate, the target value of fuel gas inflow, and the target value of oxygen inflow; calculating a fourth absorbed heat value of heat absorbed by the cooling water based on a target value of the cooling water inflow temperature, a target value of the cooling water inflow quality, a target value of the cooling water outflow temperature, and a cooling water expression; A fourth lost heat value of the lost heat is calculated by the loss expression, and a fourth burner heat value of the heat generated by the burner during operation is calculated by a conversion formula between kilowatts and joules and the working power of the burner; The fourth absorbed heat value, the fourth lost heat value, and the fourth burner heat value are input into the heat dynamic balance expression, and the equation relationship among the fourth gas heat value of the heat carried by the gas itself entering the combustion chamber, the fourth released heat value of the heat released by the combustion of the gas in the combustion chamber, and the fourth tail gas heat value of the heat carried by the tail gas discharged by the tail gas discharge unit is calculated; According to the equation relationship between the fourth gas calorific value, the fourth released calorific value, and the fourth exhaust gas calorific value, as well as according to the target value of exhaust gas temperature, the target value of fuel gas inflow mass, the target value of fuel gas temperature, the target value of oxygen inflow mass, the target value of oxygen temperature, the target value of exhaust gas discharge mass, the reaction heat expression, the input gas calorific expression, and the output gas calorific expression, the adjustment values ​​of exhaust gas discharge temperature and exhaust gas inflow mass are calculated, and according to the adjustment value of exhaust gas inflow mass, the adjustment value of exhaust gas inflow amount is calculated.

8. The method according to claim 3, characterized in that: The target task based on the dynamic balance of heat determines the main variables and the subordinate variables in the combustion reaction process, including: When the goal of the dynamic balance of heat is to adjust the cooling water inflow and the exhaust gas inflow so that the exhaust gas temperature, the fuel gas inflow, the fuel gas temperature, the oxygen inflow, the oxygen temperature, the cooling water inflow temperature, the cooling water outflow temperature, the exhaust gas discharge temperature, and the exhaust gas discharge flow rate reach the target values, the exhaust gas temperature, the fuel gas inflow, the fuel gas temperature, the oxygen inflow, the oxygen temperature, the cooling water inflow temperature, the cooling water outflow temperature, the exhaust gas discharge temperature, and the exhaust gas discharge flow rate are determined as the main variables, and the cooling water inflow and the exhaust gas inflow are determined as the dependent variables; Determining the adjustment value of the slave variable according to the target value of the master variable and the heat dynamic balance expression includes: Calculate the target value of exhaust gas discharge quality, the target value of fuel gas inflow quality, and the target value of oxygen inflow quality according to the target value of exhaust gas discharge flow rate, the target value of fuel gas inflow amount, and the target value of oxygen inflow amount; Inputting the target value of exhaust gas discharge quality and the target value of exhaust gas discharge temperature into the output gas heat expression, and calculating the fifth exhaust gas heat value of the heat carried by the exhaust gas discharged by the exhaust gas discharge unit; A fifth lost heat value of the lost heat is calculated by the loss expression, and a fifth burner heat value of the heat generated by the burner during operation is calculated by a conversion formula between kilowatts and joules and the working power of the burner; The fifth tail gas calorific value, the fifth loss calorific value, and the fifth burner calorific value are input into the heat dynamic balance expression to calculate the relationship between the fifth gas calorific value of the heat carried by the gas entering the combustion chamber, the fifth released calorific value of the heat released by the combustion of the gas in the combustion chamber, and the fifth absorbed calorific value of the heat absorbed by the cooling water; Calculate adjustment values ​​of cooling water inflow mass and exhaust gas inflow mass according to the relationship equation among the fifth gas calorific value, the fifth released calorific value and the fifth absorbed calorific value, the target value of exhaust gas temperature, the target value of fuel gas inflow mass, the target value of fuel gas temperature, the target value of oxygen inflow mass, the target value of oxygen temperature, the input gas calorific value expression, the reaction heat expression, the cooling water expression, the target value of cooling water inflow temperature, and the target value of cooling water outflow temperature; An adjustment value of the cooling water inflow amount is calculated based on the adjustment value of the cooling water inflow mass, and an adjustment value of the exhaust gas inflow amount is calculated based on the adjustment value of the exhaust gas inflow mass.

9. The method according to claim 3, characterized in that: The target task based on the dynamic balance of heat determines the main variables and the subordinate variables in the combustion reaction process, including: When the goal of the dynamic balance of heat is to adjust the exhaust gas inflow and cooling water outflow temperature so that the exhaust gas temperature, fuel gas inflow, fuel gas temperature, oxygen inflow, oxygen temperature, cooling water inflow temperature, cooling water inflow, and tail gas discharge temperature reach the target values, the exhaust gas temperature, fuel gas inflow, fuel gas temperature, oxygen inflow, oxygen temperature, cooling water inflow temperature, cooling water inflow, and tail gas discharge temperature are determined as the main variables, and the exhaust gas inflow and cooling water outflow temperature are determined as the dependent variables; Determining the adjustment value of the slave variable according to the target value of the master variable and the heat dynamic balance expression includes: Calculate the target value of exhaust gas discharge quality, the target value of fuel gas inflow quality, and the target value of oxygen inflow quality according to the target value of exhaust gas discharge flow rate, the target value of fuel gas inflow amount, and the target value of oxygen inflow amount; Inputting the target value of the exhaust gas discharge quality and the target value of the exhaust gas discharge temperature into the output gas heat expression, and calculating the sixth exhaust gas heat value of the heat carried by the exhaust gas discharged by the exhaust gas discharge unit; A sixth lost heat value of the lost heat is calculated by the loss expression, and a sixth burner heat value of the heat generated by the burner during operation is calculated by a conversion formula between kilowatts and joules and the working power of the burner; Input the sixth tail gas calorific value, the sixth loss calorific value, and the sixth burner calorific value into the heat dynamic balance expression, and calculate the relationship equation between the sixth gas calorific value of the heat carried by the gas entering the combustion chamber, the sixth released calorific value of the heat released by the combustion of the gas in the combustion chamber, and the sixth absorbed calorific value of the heat absorbed by the cooling water; According to the relationship equation among the sixth gas calorific value, the sixth released calorific value and the sixth absorbed calorific value, the target value of the exhaust gas temperature, the target value of the fuel gas inflow mass, the target value of the fuel gas temperature, the target value of the oxygen inflow mass, the target value of the oxygen temperature, the input gas calorific value expression, the reaction heat expression, the cooling water expression, the target value of the cooling water inflow temperature, and the target value of the cooling water inflow mass, the adjustment values ​​of the cooling water outlet temperature and the exhaust gas inflow mass are calculated, and the adjustment value of the exhaust gas inflow amount is calculated based on the adjustment value of the exhaust gas inflow mass.

10. A heat dynamic balance control system for waste gas treatment, characterized in that: The heat dynamic balance control system for waste gas treatment comprises: a gas input pipeline, an oxygen input pipeline, a waste gas input pipeline, a waste gas combustion treatment unit, a cooling unit, a tail gas emission unit and the heat dynamic balance controller; the gas input pipeline and the oxygen input pipeline are both connected to the burner in the waste gas combustion treatment unit; the burner and the waste gas input pipeline are both connected to the combustion chamber in the waste gas combustion treatment unit; the cooling unit is respectively connected to the combustion chamber and the tail gas emission unit; The burner is used to spray the gas in the gas input pipeline and the oxygen in the oxygen input pipeline into the combustion chamber, so as to assist the combustion of the exhaust gas flowing from the exhaust gas input pipeline into the combustion chamber in the combustion chamber; the cooling unit is used to absorb the heat released during the combustion of the exhaust gas and the heat of the gas itself in the combustion chamber through cooling water; the exhaust gas discharge unit is used to discharge the exhaust gas formed by the combustion reaction from the combustion chamber; The heat dynamic balance controller is used for: Based on the target task of heat dynamic balance, determine the main and subordinate variables in the combustion reaction process; Determining the adjustment value of the slave variable according to the target value of the master variable and the heat dynamic balance expression; During the combustion reaction, the slave variable is adjusted based on the adjustment value.

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