An intelligent monitoring system and method for equipment status for industrial waste gas treatment

Abstract

The present invention relates to the field of equipment control, and specifically to an intelligent equipment status monitoring system and method for industrial waste gas treatment, comprising: a buffer chamber module, a desorption test module, a component analysis module, an operation monitoring module and a waste gas treatment module. The buffer chamber module is used to reduce the fluctuation of the waste gas component ratio, the desorption test module is used to desorb the waste gas from the rotor with an airflow of preset temperature, the component analysis module is used to calculate the carbon content of the waste gas and adjust the rotation speed of the zeolite rotor, the operation monitoring module is used to collect the parameters of the zeolite rotor, and the waste gas treatment module is used to divide the desorption area and the combustion chamber. The present invention can control the operating temperature of the zeolite rotor, reduce the overall energy consumption and maintenance cost of the rotor equipment, improve the service life and stability of the equipment, reduce the residual organic components in the rotor, improve the treatment efficiency of organic waste gas, reduce tail gas residue, and improve the utilization rate of high-temperature tail gas.

Description

Technical Field

[0001] The present invention relates to the field of equipment control, and in particular to an intelligent monitoring system and method for equipment status for industrial waste gas treatment. Background Art

[0002] VOCs (volatile organic compounds) are a type of organic industrial waste gas that is volatile at room temperature. They are composed of aromatic compounds, alkanes, some ketones, lipids, and alcohols. VOCs are environmentally hazardous and therefore require harmless treatment through adsorption, combustion, or degradation.

[0003] The zeolite wheel and thermal storage oxidation process is one of the main means of treating VOCs. The adsorption property of zeolite is used to absorb the exhaust gas in the adsorption zone. When the wheel rotates to the desorption zone, the desorption fan brings high-temperature gas to desorb the exhaust gas, so that the large-volume, low-concentration exhaust gas is concentrated into high-concentration, small-volume exhaust gas, and finally the exhaust gas is passed into the oxidation tank for combustion treatment.

[0004] However, the existing zeolite wheel operates with constant parameters, the desorption temperature and combustion temperature are set too high, and the rotation speed is set too high, resulting in high overall energy consumption of the equipment. In addition, since there are many components that make up VOCs waste gas, the desorption temperature, desorption efficiency, combustion temperature and catalyst used are different among the components. The adsorbed waste gas cannot be completely desorbed in one rotation of the wheel, causing the waste gas to remain in the wheel, affecting the subsequent waste gas treatment efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide an intelligent monitoring system and method for equipment status for industrial waste gas treatment, so as to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: an intelligent monitoring system for equipment status for industrial waste gas treatment, comprising: a buffer chamber module, a desorption test module, a component analysis module, an operation monitoring module and a waste gas treatment module;

[0007] The buffer chamber module is arranged in front of the air inlet of the zeolite rotor to filter particulate impurities and suspended droplets in the industrial waste gas, fully mix all VOCs produced within a fixed period of time in the closed chamber, and reduce the fluctuation of the proportion of different components in the waste gas. The adsorption fan at the outlet of the chamber draws the waste gas into the zeolite rotor at a fixed wind speed, and at the same time, air is introduced to maintain a constant air pressure in the chamber.

[0008] The desorption test module is composed of a zeolite rotor, a desorption fan, and a thermal storage oxidation combustion chamber. The zeolite rotor is used to adsorb the exhaust gas extracted by the fan. The rotor rotates around the central axis, and the rotation speed is controlled by the feedback signal of the control chip. The desorption fan is used to desorb the exhaust gas from the rotor with a preset temperature airflow when the rotor rotates to the desorption area. The thermal storage oxidation combustion chamber is used to ignite the desorbed exhaust gas through a catalyst and a heating device to perform harmless treatment on the exhaust gas.

[0009] The component analysis module is used to obtain the combustion calorific value of the organic waste gas through the heat change in the combustion chamber, calculate the carbon content based on the combustion calorific value, and output the functional relationship between the carbon content per unit volume of the desorbed gas and the desorption temperature after the zeolite rotor rotates one circle. The function is tested for stability, and the point that meets the stability condition is regarded as the stable point. The speed of the zeolite rotor is adjusted according to the desorption temperature corresponding to the stable point and the maximum air intake speed of the adsorption fan to keep the desorption temperature constant;

[0010] The operation monitoring module is composed of an electronic chip and a driving rotor unit, which is used to collect the rotation speed of the zeolite rotor, the wind speed of the adsorption fan, the wind speed of the desorption fan and the desorption temperature, calculate the stable point and send a control signal to the rotor. If the stable point is not reached, the adsorption fan is turned off and the zeolite rotor is rotated again until the stable point is reached.

[0011] The exhaust gas treatment module is used to determine the carbon content ratio of each organic component in the buffer gas chamber according to the stable point, divide the exhaust gas into desorption areas for each carbon content level, and perform secondary heating on the airflow emitted by the desorption fan in each area so that each area desorbs at a different temperature, and send the desorbed gas obtained in different areas into the heat storage combustion chamber at different temperatures.

[0012] Furthermore, the buffer air chamber module includes: an exhaust gas compression unit and an adsorption fan unit;

[0013] The exhaust gas compression unit is composed of a soft or vacuum hard closed air chamber, the air inlet of the air chamber is connected to the exhaust gas emission source, and the air outlet is connected to the adsorption fan through a one-way valve;

[0014] The adsorption fan unit is used to extract exhaust gas into the zeolite rotor at a fixed wind speed, and the fan has a communication function and a real-time wind speed adjustment function.

[0015] Furthermore, the desorption test module includes: a zeolite rotor unit, a desorption blower unit and a thermal storage combustion unit;

[0016] The zeolite wheel unit is composed of a disc frame and zeolite arranged in the frame. The zeolite is selected from aluminosilicate crystals containing alkaline earth metals or alkali metals and is used to absorb organic components in exhaust gas.

[0017] The desorption fan unit is used to generate an airflow that changes according to a preset temperature curve in the desorption zone to desorb the exhaust gas from the rotor;

[0018] The heat storage combustion unit is used to send the desorbed exhaust gas into the combustion chamber, heat the combustion chamber to a specified temperature, and ignite the exhaust gas.

[0019] Furthermore, the component analysis module includes: a stability assessment unit and a ratio separation unit;

[0020] The stability evaluation unit is used to calculate the functional relationship between the carbon content per unit volume of the desorbed gas and the desorption temperature, and to determine whether each point of the function meets the stability condition;

[0021] The ratio separation unit is used to analyze the stable point to obtain the ratio of each carbon content component in the exhaust gas.

[0022] Furthermore, the operation supervision module includes: an electronic chip unit and a drive rotor unit;

[0023] The electronic chip unit is used to collect parameters during the operation of the zeolite rotor, including the rotation speed of the zeolite rotor, the wind speed of the adsorption fan, the wind speed of the desorption fan and the desorption temperature;

[0024] The driving rotor unit is used to drive the zeolite wheel to rotate and adjust the rotation speed of the zeolite wheel.

[0025] Furthermore, the exhaust gas treatment module includes: a desorption isolation unit, a gas chamber valve unit and an exhaust gas recovery unit;

[0026] The desorption isolation unit is used to divide the desorption area according to the proportion of each carbon content component in the exhaust gas, and to perform desorption at different temperatures in each desorption area;

[0027] The gas chamber valve unit is used to divert the desorbed exhaust gas from each desorption area, diverting the exhaust gas with a single carbon content component to the combustion chamber with the corresponding temperature;

[0028] The tail gas recovery unit is used to collect the tail gas after ignition, remove inorganic impurities in the tail gas and then discharge it.

[0029] A method for intelligently monitoring equipment status for industrial waste gas treatment includes the following steps:

[0030] Step S1. A buffer chamber is set in front of the zeolite rotor. The air inlet of the buffer chamber is connected to the exhaust gas emission source, and the air outlet is connected to the adsorption fan. The adsorption fan extracts the exhaust gas from the buffer chamber at a fixed wind speed and sends it to the zeolite rotor;

[0031] Step S2. After the zeolite rotor rotates at a constant speed for one circle, the desorption fan is turned on to generate a desorption airflow with a constant wind speed in the desorption area of ​​the rotor. The heating temperature of the desorption airflow is adjusted so that the temperature of the desorption airflow increases according to a preset function.

[0032] Step S3. Ignite the desorbed gas flow in the combustion chamber, monitor the heat change inside the combustion chamber, calculate the carbon content of the desorbed gas flow, obtain a first function of the carbon content and the desorption temperature, find all stable points in the first function that meet the step condition, and use the desorption temperature corresponding to each stable point as a temperature level;

[0033] Step S4. Subtract the integrals of the first function within adjacent stable points layer by layer to obtain the proportion of components of each carbon content level in the exhaust gas. When the zeolite wheel rotates again, desorption airflows of different temperature levels are generated in the desorption area until all corresponding components are desorbed. The temperature level is then set to the next level until all components are desorbed.

[0034] Step S5. Divide the desorption area into fan-shaped sub-areas according to the proportion of each component in the exhaust gas, and divert the desorption airflow of each sub-area to the combustion chamber with different combustion conditions through a multi-way valve, collect the exhaust gas after combustion, remove inorganic impurities and then discharge it.

[0035] Furthermore, step S1 includes:

[0036] Step S11. After filtering out particulate impurities and suspended droplets, the organic industrial waste gas is passed through the air inlet into a buffer air chamber. The buffer air chamber includes a soft air chamber and a vacuum hard air chamber, so that industrial waste gases from different sources are fully mixed in the air chamber;

[0037] Step S12. The buffer chamber outlet is equipped with an adsorption fan to extract exhaust gas from the chamber at a preset constant wind speed and send it into the adsorption area of ​​the zeolite wheel, and keep the total amount of extracted exhaust gas less than the maximum adsorption capacity of the zeolite wheel.

[0038] Furthermore, step S2 includes:

[0039] Step S21. Turn on the drive rotor in the rotor to rotate the zeolite rotor at a constant speed for one revolution. Turn on the fan in the desorption area to generate a desorption airflow with a constant wind speed. A temperature change function G(t) is preset so that G(t) changes incrementally over the domain of definition and the range of the function G(t) is greater than the effective desorption temperature range of all exhaust gas components, where t represents time.

[0040] Step S22: Adjust the heating tube of the desorption fan so that the temperature of the desorption airflow changes according to the function G(x), collect the desorbed exhaust gas, and send the exhaust gas to the heat storage combustion chamber for ignition in real time.

[0041] Furthermore, step S3 includes:

[0042] Step S31. A temperature monitoring device is installed in the combustion chamber to obtain the temperature change in the combustion chamber during exhaust gas combustion and calculate the exhaust gas combustion heat Q, where Q = (T1-T0)·c, where T1 represents the current temperature in the combustion chamber, T0 represents the initial temperature in the combustion chamber, and c represents the temperature rise coefficient of the heat storage medium in the combustion chamber;

[0043] Step S32. Calculate the average carbon content r of the desorbed exhaust gas, where the carbon content represents the number of carbon atoms in the organic component and satisfies the following conditions:

[0044] r=Q·V mol / [(V1-V2)·H];

[0045] Where V mol represents the molar volume of gas at normal pressure, V1 and V2 represent the volume of gas entering the combustion chamber and the volume of gas produced by the desorption fan, respectively, and H represents the heat generation coefficient of the complete combustion product;

[0046] Step S33. Construct a mapping relationship F(T) between the average carbon content and the desorption temperature, where T represents the desorption temperature of the desorption fan, and the value of F(T) represents the average carbon content of the desorbed exhaust gas when the desorption temperature is T;

[0047] Perform stability analysis on the function F(T) and calculate the step condition: |F ’ (T)|>u under the condition of all the value intervals of the independent variable T, where F ’ (T) represents the first-order derivative of the function F(T), u is the preset step parameter, and the upper bounds of all value intervals are obtained and arranged in ascending order to form a set X, X = {x1, x2, …, xi, …, xn}, where n represents the number of value intervals and xi represents the upper bound of the i-th value interval;

[0048] Step S34. Take (xi, F(xi)) as the coordinates of the stable point and output all n stable points. The temperature level corresponding to the stable point (xi, F(xi)) is the same as the value of xi.

[0049] Furthermore, step S4 includes:

[0050] Step S41: Subtract the integrals of the first function within adjacent stable points layer by layer, and calculate the proportion of components of each carbon content level in the exhaust gas according to the following formula:

[0051]

[0052] Among them, a i and a i-1Respectively represent the proportion of the i-th and i-1-th carbon content level components in the exhaust gas. Since the proportion of all components in the exhaust gas is 1 and there is no need to separate them by temperature, it is stipulated that a0=1, x0=0, 0 <ai≤1;

[0053] Step S42: When the zeolite rotor rotates again, the desorption fan generates a desorption airflow at temperature x1 until all components corresponding to temperature x1 are desorbed. The desorption fan temperature is then increased to x2 until all components corresponding to temperature x2 are desorbed. This step is repeated until the desorption fan temperature reaches xn and the temperature in the combustion chamber no longer rises.

[0054] Step S43: Count the time t used in the execution of step S42, and adjust the angular velocity v of the zeolite wheel, where v=2π / t, so that the rotation speed matches the desorption rate.

[0055] Furthermore, step S5 includes:

[0056] Step S51: Divide the desorption area into n sector-shaped sub-areas, corresponding to n components in the exhaust gas. The area of ​​each sub-area is determined by the proportion of the component with the corresponding carbon content level in the exhaust gas. The desorption fan is heated once after passing through each sub-area. A multi-way valve is used to connect the sub-areas so that the desorption airflow from each sub-area enters the multi-way valve pipeline.

[0057] Step S52: Use a multi-way valve pipeline to divert the desorbed gas from each sub-region to different regions of the combustion chamber, and set the combustion conditions of the corresponding combustion region according to the carbon content of the corresponding components in each sub-region;

[0058] Step S53: Collect the tail gas generated in the combustion chamber, remove inorganic impurities in the tail gas, obtain regeneration air, and discharge the regeneration air out of the combustion chamber for secondary utilization.

[0059] Compared with the prior art, the present invention has the following beneficial effects:

[0060] 1. The present invention sets a buffer air chamber in front of the zeolite rotor, and constantly draws exhaust gas from the buffer air chamber into the zeolite rotor. The desorption fan desorbs the exhaust gas from the rotor at a variable temperature and wind speed. The carbon content of the organic exhaust gas is obtained from the combustion chamber temperature, and then the components of the exhaust gas and the effective desorption temperature are analyzed, which helps to control the operating temperature of the zeolite rotor and reduce the overall energy consumption and maintenance cost of the rotor equipment.

[0061] 2. The present invention analyzes the functional relationship between the carbon content per unit volume of the desorbed gas and the desorption temperature, resolves the stable point in the function, and adjusts the rotation speed of the zeolite wheel according to the desorption temperature corresponding to the stable point and the maximum air intake speed of the adsorption fan, so as to keep the desorption temperature constant, avoid frequent changes in the desorption temperature of the fan due to changes in the exhaust gas components, improve the service life and stability of the equipment, reduce the residual organic components in the wheel, and improve the treatment efficiency of organic waste gas.

[0062] 3. The present invention determines the carbon content level of each organic component in the buffer gas chamber according to the stable point, divides the desorption area according to the carbon content level, desorbs each area at a different temperature, and sends the desorbed gas from each area into a heat storage combustion chamber with different temperature and oxygen content, so as to carry out targeted desorption of the exhaust gas, reduce the tail gas residue, and improve the utilization rate of the high-temperature tail gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0064] Figure 1 This is a structural diagram of an intelligent monitoring system for equipment status for industrial waste gas treatment according to the present invention;

[0065] Figure 2 This is a schematic diagram of the steps of an intelligent monitoring method for equipment status for industrial waste gas treatment according to the present invention. DETAILED DESCRIPTION

[0066] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0067] See also Figure 1 , the present invention provides a technical solution: an intelligent monitoring system for equipment status for industrial waste gas treatment, comprising: a buffer chamber module, a desorption test module, a component analysis module, an operation monitoring module and a waste gas treatment module;

[0068] The buffer chamber module is arranged in front of the air inlet of the zeolite rotor to filter particulate impurities and suspended droplets in the industrial waste gas, fully mix all VOCs produced within a fixed period of time in the closed chamber, and reduce the fluctuation of the proportion of different components in the waste gas. The adsorption fan at the outlet of the chamber draws the waste gas into the zeolite rotor at a fixed wind speed, and at the same time, air is introduced to maintain a constant air pressure in the chamber.

[0069] The buffer air chamber module includes: an exhaust gas compression unit and an adsorption fan unit;

[0070] The exhaust gas compression unit is composed of a soft or vacuum hard closed air chamber, the air inlet of the air chamber is connected to the exhaust gas emission source, and the air outlet is connected to the adsorption fan through a one-way valve;

[0071] The adsorption fan unit is used to extract exhaust gas into the zeolite rotor at a fixed wind speed, and the fan has a communication function and a real-time wind speed adjustment function.

[0072] The desorption test module is composed of a zeolite rotor, a desorption fan, and a thermal storage oxidation combustion chamber. The zeolite rotor is used to adsorb the exhaust gas extracted by the fan. The rotor rotates around the central axis, and the rotation speed is controlled by the feedback signal of the control chip. The desorption fan is used to desorb the exhaust gas from the rotor with a preset temperature airflow when the rotor rotates to the desorption area. The thermal storage oxidation combustion chamber is used to ignite the desorbed exhaust gas through a catalyst and a heating device to perform harmless treatment on the exhaust gas.

[0073] The desorption test module includes: a zeolite rotor unit, a desorption blower unit and a thermal storage combustion unit;

[0074] The zeolite wheel unit is composed of a disc frame and zeolite arranged in the frame. The zeolite is selected from aluminosilicate crystals containing alkaline earth metals or alkali metals and is used to absorb organic components in exhaust gas.

[0075] The desorption fan unit is used to generate an airflow that changes according to a preset temperature curve in the desorption zone to desorb the exhaust gas from the rotor;

[0076] The heat storage combustion unit is used to send the desorbed exhaust gas into the combustion chamber, heat the combustion chamber to a specified temperature, and ignite the exhaust gas.

[0077] The component analysis module is used to obtain the combustion calorific value of the organic waste gas through the heat change in the combustion chamber, calculate the carbon content based on the combustion calorific value, and output the functional relationship between the carbon content per unit volume of the desorbed gas and the desorption temperature after the zeolite rotor rotates one circle. The function is tested for stability, and the point that meets the stability condition is regarded as the stable point. The speed of the zeolite rotor is adjusted according to the desorption temperature corresponding to the stable point and the maximum air intake speed of the adsorption fan to keep the desorption temperature constant;

[0078] The component analysis module includes: a stability assessment unit and a ratio separation unit;

[0079] The stability evaluation unit is used to calculate the functional relationship between the carbon content per unit volume of the desorbed gas and the desorption temperature, and to determine whether each point of the function meets the stability condition;

[0080] The ratio separation unit is used to analyze the stable point to obtain the ratio of each carbon content component in the exhaust gas.

[0081] The operation monitoring module is composed of an electronic chip and a driving rotor unit, which is used to collect the rotation speed of the zeolite rotor, the wind speed of the adsorption fan, the wind speed of the desorption fan and the desorption temperature, calculate the stable point and send a control signal to the rotor. If the stable point is not reached, the adsorption fan is turned off and the zeolite rotor is rotated again until the stable point is reached.

[0082] The operation supervision module includes: an electronic chip unit and a drive rotor unit;

[0083] The electronic chip unit is used to collect parameters during the operation of the zeolite rotor, including the rotation speed of the zeolite rotor, the wind speed of the adsorption fan, the wind speed of the desorption fan and the desorption temperature;

[0084] The driving rotor unit is used to drive the zeolite wheel to rotate and adjust the rotation speed of the zeolite wheel.

[0085] The exhaust gas treatment module is used to determine the carbon content ratio of each organic component in the buffer gas chamber according to the stable point, divide the exhaust gas into desorption areas for each carbon content level, and perform secondary heating on the airflow emitted by the desorption fan in each area so that each area desorbs at a different temperature, and send the desorbed gas obtained in different areas into the heat storage combustion chamber at different temperatures.

[0086] The exhaust gas treatment module includes: a desorption isolation unit, a gas chamber valve unit and an exhaust gas recovery unit;

[0087] The desorption isolation unit is used to divide the desorption area according to the proportion of each carbon content component in the exhaust gas, and to perform desorption at different temperatures in each desorption area;

[0088] The gas chamber valve unit is used to divert the desorbed exhaust gas from each desorption area, diverting the exhaust gas with a single carbon content component to the combustion chamber with the corresponding temperature;

[0089] The tail gas recovery unit is used to collect the tail gas after ignition, remove inorganic impurities in the tail gas and then discharge it.

[0090] like Figure 2 As shown, a method for intelligent monitoring of equipment status for industrial waste gas treatment includes the following steps:

[0091] Step S1. A buffer chamber is set in front of the zeolite rotor. The air inlet of the buffer chamber is connected to the exhaust gas emission source, and the air outlet is connected to the adsorption fan. The adsorption fan extracts the exhaust gas from the buffer chamber at a fixed wind speed and sends it to the zeolite rotor;

[0092] Step S1 includes:

[0093] Step S11. After filtering out particulate impurities and suspended droplets, the organic industrial waste gas is passed through the air inlet into a buffer air chamber. The buffer air chamber includes a soft air chamber and a vacuum hard air chamber, so that industrial waste gases from different sources are fully mixed in the air chamber;

[0094] Step S12. The buffer chamber outlet is equipped with an adsorption fan to extract exhaust gas from the chamber at a preset constant wind speed and send it into the adsorption area of ​​the zeolite wheel, and keep the total amount of extracted exhaust gas less than the maximum adsorption capacity of the zeolite wheel.

[0095] Step S2. After the zeolite rotor rotates at a constant speed for one circle, the desorption fan is turned on to generate a desorption airflow with a constant wind speed in the desorption area of ​​the rotor. The heating temperature of the desorption airflow is adjusted so that the temperature of the desorption airflow increases according to a preset function.

[0096] Step S2 includes:

[0097] Step S21. Turn on the drive rotor in the rotor to rotate the zeolite rotor at a constant speed for one revolution. Turn on the fan in the desorption area to generate a desorption airflow with a constant wind speed. A temperature change function G(t) is preset so that G(t) changes incrementally over the domain of definition and the range of the function G(t) is greater than the effective desorption temperature range of all exhaust gas components, where t represents time.

[0098] Step S22: Adjust the heating tube of the desorption fan so that the temperature of the desorption airflow changes according to the function G(x), collect the desorbed exhaust gas, and send the exhaust gas to the heat storage combustion chamber for ignition in real time.

[0099] Step S3. Ignite the desorbed gas flow in the combustion chamber, monitor the heat change inside the combustion chamber, calculate the carbon content of the desorbed gas flow, obtain a first function of the carbon content and the desorption temperature, find all stable points in the first function that meet the step condition, and use the desorption temperature corresponding to each stable point as a temperature level;

[0100] Step S3 includes:

[0101] Step S31. A temperature monitoring device is installed in the combustion chamber to obtain the temperature change in the combustion chamber during exhaust gas combustion and calculate the exhaust gas combustion heat Q, where Q = (T1-T0)·c, where T1 represents the current temperature in the combustion chamber, T0 represents the initial temperature in the combustion chamber, and c represents the temperature rise coefficient of the heat storage medium in the combustion chamber;

[0102] Step S32. Calculate the average carbon content r of the desorbed exhaust gas, where the carbon content represents the number of carbon atoms in the organic component and satisfies the following conditions:

[0103] r=Q·V mol / [(V1-V2)·H];

[0104] Where V molrepresents the molar volume of gas at normal pressure, V1 and V2 represent the volume of gas entering the combustion chamber and the volume of gas produced by the desorption fan, respectively, and H represents the heat generation coefficient of the complete combustion product;

[0105] Step S33. Construct a mapping relationship F(T) between the average carbon content and the desorption temperature, where T represents the desorption temperature of the desorption fan, and the value of F(T) represents the average carbon content of the desorbed exhaust gas when the desorption temperature is T;

[0106] Perform stability analysis on the function F(T) and calculate the step condition: |F ’ (T)|>u under the condition of all the value intervals of the independent variable T, where F ’ (T) represents the first-order derivative of the function F(T), u is the preset step parameter, and the upper bounds of all value intervals are obtained and arranged in ascending order to form a set X, X = {x1, x2, …, xi, …, xn}, where n represents the number of value intervals and xi represents the upper bound of the i-th value interval;

[0107] Step S34. Take (xi, F(xi)) as the coordinates of the stable point and output all n stable points. The temperature level corresponding to the stable point (xi, F(xi)) is the same as the value of xi.

[0108] Step S4. Subtract the integrals of the first function within adjacent stable points layer by layer to obtain the proportion of components of each carbon content level in the exhaust gas. When the zeolite wheel rotates again, desorption airflows of different temperature levels are generated in the desorption area until all corresponding components are desorbed. The temperature level is then set to the next level until all components are desorbed.

[0109] Step S4 includes:

[0110] Step S41: Subtract the integrals of the first function within adjacent stable points layer by layer, and calculate the proportion of components of each carbon content level in the exhaust gas according to the following formula:

[0111]

[0112] Among them, a i and a i-1 Respectively represent the proportions of the components of the i-th and i-1-th carbon content levels in the exhaust gas. Since the proportion of all components in the exhaust gas is 1 and there is no need to separate them by temperature, it is specified that a0=1 and x0=0;

[0113] Step S42: When the zeolite rotor rotates again, the desorption fan generates a desorption airflow at temperature x1 until all components corresponding to temperature x1 are desorbed. The desorption fan temperature is then increased to x2 until all components corresponding to temperature x2 are desorbed. This step is repeated until the desorption fan temperature reaches xn and the temperature in the combustion chamber no longer rises.

[0114] Step S43: Count the time t used in the execution of step S42, and adjust the angular velocity v of the zeolite wheel, where v=2π / t, so that the rotation speed matches the desorption rate.

[0115] Step S5. Divide the desorption area into fan-shaped sub-areas according to the proportion of each component in the exhaust gas, and divert the desorption airflow of each sub-area to the combustion chamber with different combustion conditions through a multi-way valve, collect the exhaust gas after combustion, remove inorganic impurities and then discharge it.

[0116] Step S5 includes:

[0117] Step S51: Divide the desorption area into n sector-shaped sub-areas, corresponding to n components in the exhaust gas. The area of ​​each sub-area is determined by the proportion of the component with the corresponding carbon content level in the exhaust gas. The desorption fan is heated once after passing through each sub-area. A multi-way valve is used to connect the sub-areas so that the desorption airflow from each sub-area enters the multi-way valve pipeline.

[0118] Step S52: Use a multi-way valve pipeline to divert the desorbed gas from each sub-region to different regions of the combustion chamber, and set the combustion conditions of the corresponding combustion region according to the carbon content of the corresponding components in each sub-region;

[0119] Step S53: Collect the tail gas generated in the combustion chamber, remove inorganic impurities in the tail gas, obtain regeneration air, and discharge the regeneration air out of the combustion chamber for secondary utilization.

[0120] Example: Adsorption fan with 10m 3 / min, the air flow is drawn from the buffer chamber into the zeolite rotor. After the rotor rotates one circle, the desorption fan generates 2m 3 / min of desorption airflow, with an initial temperature of 50℃, and the desorption temperature is increased at a rate of 50℃ per second until the temperature reaches 500℃. It is calculated that there are three organic components in the exhaust gas, with contents of 10%, 40% and 50% respectively, and the desorption temperatures are 100℃, 250℃ and 400℃ respectively. The desorption area is divided into three sector-shaped areas with a ratio of 1:4:5, and desorption is carried out in each area at temperatures of 100℃, 250℃ and 400℃ respectively. The exhaust gas after desorption is sent to different combustion chambers.

[0121] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0122] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A method for intelligent monitoring of equipment status for industrial waste gas treatment, characterized in that: The method comprises the following steps: Step S1. A buffer chamber is set in front of the zeolite rotor. The air inlet of the buffer chamber is connected to the exhaust gas emission source, and the air outlet is connected to the adsorption fan. The adsorption fan extracts the exhaust gas from the buffer chamber at a fixed wind speed and sends it to the zeolite rotor; Step S2. After the zeolite rotor rotates at a constant speed for one circle, the desorption fan is turned on to generate a desorption airflow with a constant wind speed in the desorption area of ​​the rotor. The heating temperature of the desorption airflow is adjusted so that the temperature of the desorption airflow increases according to a preset function. Step S3. Ignite the desorbed gas flow in the combustion chamber, monitor the heat change inside the combustion chamber, calculate the carbon content of the desorbed gas flow, obtain a first function of the carbon content and the desorption temperature, find all stable points in the first function that meet the step condition, and use the desorption temperature corresponding to each stable point as a temperature level; Step S4. Subtract the integrals of the first function within adjacent stable points layer by layer to obtain the proportion of components of each carbon content level in the exhaust gas. When the zeolite wheel rotates again, desorption airflows of different temperature levels are generated in the desorption area until all corresponding components are desorbed. The temperature level is then set to the next level until all components are desorbed. Step S5. Divide the desorption area into sector-shaped sub-areas according to the proportion of each component in the exhaust gas, and divert the desorption airflow of each sub-area to the combustion chamber with different combustion conditions through a multi-way valve. The exhaust gas after combustion is collected and discharged after removing inorganic impurities; Step S3 includes: Step S31. A temperature monitoring device is installed in the combustion chamber to obtain the temperature change in the combustion chamber during exhaust gas combustion and calculate the exhaust gas combustion heat Q, where Q = (T1-T0)·c, where T1 represents the current temperature in the combustion chamber, T0 represents the initial temperature in the combustion chamber, and c represents the temperature rise coefficient of the heat storage medium in the combustion chamber; Step S32. Calculate the average carbon content r of the desorbed exhaust gas, where the carbon content represents the number of carbon atoms in the organic component and satisfies the following conditions: r=Q·V mol / [(V1-V2)·H]; Where V mol represents the molar volume of gas at normal pressure, V1 and V2 represent the volume of gas entering the combustion chamber and the volume of gas produced by the desorption fan, respectively, and H represents the heat generation coefficient of the complete combustion product; Step S33. Construct a mapping relationship F(T) between the average carbon content and the desorption temperature, where T represents the desorption temperature of the desorption fan, and the value of F(T) represents the average carbon content of the desorbed exhaust gas when the desorption temperature is T; Perform stability analysis on the function F(T) and calculate the step condition: |F ’ (T)|>u under the condition of all the value intervals of the independent variable T, where F ’ (T) represents the first-order derivative of the function F(T), u is the preset step parameter, and the upper bounds of all value intervals are obtained and arranged in ascending order to form a set X, X={x1,x2,…,xi,…,xn}, where n represents the number of value intervals and xi represents the upper bound of the i-th value interval; Step S34. Take (xi, F(xi)) as the coordinates of the stable point and output all n stable points. The temperature level corresponding to the stable point (xi, F(xi)) is the same as the value of xi; Step S4 includes: Step S41: Subtract the integrals of the first function within adjacent stable points layer by layer, and calculate the proportion of components of each carbon content level in the exhaust gas according to the following formula: ； where, a i and a i-1 respectively represent the proportions of the components of the i-th and (i - 1)-th carbon content grades in the waste gas. It is stipulated that a0 = 1, x0 = 0, 0 < ai ≤ 1, xi represents the upper bound of the i-th value range, and xi+1 represents the upper bound of the (i + 1)-th value range; Step S42: When the zeolite rotor rotates again, the desorption fan generates a desorption airflow at temperature x1 until all components corresponding to temperature x1 are desorbed. The desorption fan temperature is then increased to x2 until all components corresponding to temperature x2 are desorbed. This step is repeated until the desorption fan temperature reaches xn and the temperature in the combustion chamber no longer rises. Step S43: Count the time t used for executing step S42, and adjust the angular velocity v of the zeolite wheel, where v=2π / t, so that the rotation speed matches the desorption rate.

2. The method for intelligent monitoring of equipment status for industrial waste gas treatment according to claim 1, characterized in that: Step S1 includes: Step S11. After filtering out particulate impurities and suspended droplets, the organic industrial waste gas is passed through the air inlet into a buffer air chamber. The buffer air chamber includes a soft air chamber and a vacuum hard air chamber, so that industrial waste gases from different sources are fully mixed in the air chamber; Step S12. An adsorption fan is set at the air outlet of the buffer air chamber to extract exhaust gas from the air chamber at a preset constant wind speed and send it into the adsorption area of ​​the zeolite rotor, and keep the total amount of extracted exhaust gas less than the maximum adsorption capacity of the zeolite rotor.

3. The method for intelligent monitoring of equipment status for industrial waste gas treatment according to claim 2, characterized in that: Step S5 includes: Step S51: Divide the desorption area into n sector-shaped sub-areas, corresponding to n components in the exhaust gas. The area of ​​each sub-area is determined by the proportion of the component with the corresponding carbon content level in the exhaust gas. The desorption fan is heated once after passing through each sub-area. A multi-way valve is used to connect the sub-areas so that the desorption airflow from each sub-area enters the multi-way valve pipeline. Step S52: Use a multi-way valve pipeline to divert the desorbed gas from each sub-region to different regions of the combustion chamber, and set the combustion conditions of the corresponding combustion region according to the carbon content of the corresponding components in each sub-region; Step S53: Collect the tail gas generated in the combustion chamber, remove inorganic impurities in the tail gas, obtain regeneration air, and discharge the regeneration air out of the combustion chamber for secondary utilization.

4. A system for intelligent monitoring of equipment status for industrial waste gas treatment, said system executing the method for intelligent monitoring of equipment status for industrial waste gas treatment as claimed in claim 1, characterized in that: It includes the following modules: buffer gas chamber module, desorption test module, component analysis module, operation supervision module and exhaust gas treatment module; The buffer chamber module is arranged in front of the air inlet of the zeolite rotor to filter particulate impurities and suspended droplets in the industrial waste gas, fully mix all VOCs produced within a fixed period of time in the closed chamber, and reduce the fluctuation of the proportion of different components in the waste gas. The adsorption fan at the outlet of the chamber draws the waste gas into the zeolite rotor at a fixed wind speed, and at the same time, air is introduced to maintain a constant air pressure in the chamber. The desorption test module is composed of a zeolite rotor, a desorption fan, and a thermal storage oxidation combustion chamber. The zeolite rotor is used to adsorb the exhaust gas extracted by the fan. The rotor rotates around the central axis, and the rotation speed is controlled by the feedback signal of the control chip. The desorption fan is used to desorb the exhaust gas from the rotor with a preset temperature airflow when the rotor rotates to the desorption area. The thermal storage oxidation combustion chamber is used to ignite the desorbed exhaust gas through a catalyst and a heating device to perform harmless treatment on the exhaust gas. The component analysis module is used to obtain the combustion calorific value of the organic waste gas through the heat change in the combustion chamber, calculate the carbon content based on the combustion calorific value, and output the functional relationship between the carbon content per unit volume of the desorbed gas and the desorption temperature after the zeolite rotor rotates one circle. The function is tested for stability, and the point that meets the stability condition is regarded as the stable point. The speed of the zeolite rotor is adjusted according to the desorption temperature corresponding to the stable point and the maximum air intake speed of the adsorption fan to keep the desorption temperature constant; The operation monitoring module is composed of an electronic chip and a driving rotor unit, which is used to collect the rotation speed of the zeolite rotor, the wind speed of the adsorption fan, the wind speed of the desorption fan and the desorption temperature, calculate the stable point and send a control signal to the rotor. If the stable point is not reached, the adsorption fan is turned off and the zeolite rotor is rotated again until the stable point is reached. The exhaust gas treatment module is used to determine the carbon content ratio of each organic component in the buffer gas chamber according to the stable point, divide the exhaust gas into desorption areas for each carbon content level, and perform secondary heating on the airflow emitted by the desorption fan in each area so that each area desorbs at a different temperature, and send the desorbed gas obtained in different areas into the heat storage combustion chamber at different temperatures.

5. The intelligent monitoring system for equipment status for industrial waste gas treatment according to claim 4 is characterized by: The buffer air chamber module includes: an exhaust gas compression unit and an adsorption fan unit; The exhaust gas compression unit is composed of a soft or vacuum hard closed air chamber, the air inlet of the air chamber is connected to the exhaust gas emission source, and the air outlet is connected to the adsorption fan through a one-way valve; The adsorption fan unit is used to extract exhaust gas into the zeolite rotor at a fixed wind speed, and the fan has a communication function and a real-time wind speed adjustment function.

6. The intelligent monitoring system for equipment status for industrial waste gas treatment according to claim 5 is characterized by: The desorption test module includes: a zeolite rotor unit, a desorption blower unit and a thermal storage combustion unit; The zeolite wheel unit is composed of a disc frame and zeolite arranged in the frame. The zeolite is selected from aluminosilicate crystals containing alkaline earth metals or alkali metals and is used to absorb organic components in exhaust gas. The desorption fan unit is used to generate an airflow that changes according to a preset temperature curve in the desorption zone to desorb the exhaust gas from the rotor; The heat storage combustion unit is used to send the desorbed exhaust gas into the combustion chamber, heat the combustion chamber to a specified temperature, and ignite the exhaust gas.

7. The intelligent monitoring system for equipment status for industrial waste gas treatment according to claim 6 is characterized by: The component analysis module includes: a stability assessment unit and a ratio separation unit; The stability evaluation unit is used to calculate the functional relationship between the carbon content per unit volume of the desorbed gas and the desorption temperature, and to determine whether each point of the function meets the stability condition; The ratio separation unit is used to analyze the stable point and obtain the ratio of each carbon content component in the exhaust gas; The operation supervision module includes: an electronic chip unit and a drive rotor unit; The electronic chip unit is used to collect parameters during the operation of the zeolite rotor, including the rotation speed of the zeolite rotor, the wind speed of the adsorption fan, the wind speed of the desorption fan and the desorption temperature; The driving rotor unit is used to drive the zeolite wheel to rotate and adjust the rotation speed of the zeolite wheel.

8. The intelligent monitoring system for equipment status for industrial waste gas treatment according to claim 7 is characterized by: The exhaust gas treatment module includes: a desorption isolation unit, a gas chamber valve unit and an exhaust gas recovery unit; The desorption isolation unit is used to divide the desorption area according to the proportion of each carbon content component in the exhaust gas, and to perform desorption at different temperatures in each desorption area; The gas chamber valve unit is used to divert the desorbed exhaust gas from each desorption area, diverting the exhaust gas with a single carbon content component to the combustion chamber with the corresponding temperature; The tail gas recovery unit is used to collect the tail gas after ignition, remove inorganic impurities in the tail gas and then discharge it.

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