Equipment state intelligent supervision system and method for industrial waste gas treatment

Abstract

The invention relates to the field of equipment control, in particular to an equipment state intelligent supervision system and method for industrial waste gas treatment, and the system comprises a buffer gas chamber module, a desorption test module, a component analysis module, an operation supervision module and a waste gas treatment module, the desorption test module is used for desorbing waste gas from the rotating wheel by using airflow at a preset temperature, the component analysis module is used for calculating the carbon content of the waste gas and adjusting the rotating speed of the zeolite rotating wheel, the operation supervision module is used for collecting parameters of the zeolite rotating wheel, and the waste gas treatment module is used for dividing a desorption area and a combustion chamber. The overall energy consumption and maintenance cost of runner equipment are reduced, the service life of the equipment is prolonged, the stability of the equipment is improved, residual organic components in the runner are reduced, the treatment efficiency of organic waste gas is improved, tail gas residues are reduced, and the utilization rate of high-temperature tail gas is increased.

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 used in 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 and is composed of aromatic compounds, alkane compounds, some ketones, lipids, and alcohol gaseous compounds. VOCs are environmentally harmful and therefore need to be rendered harmless 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 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 fast, 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 gas chamber module, a desorption test module, a component analysis module, an operation monitoring module and a waste gas treatment module;

[0007] The buffer air chamber module is arranged in front of the air inlet of the zeolite rotor, and is used to filter particulate impurities and suspended droplets in the industrial waste gas, fully mix all VOCs generated within a fixed period of time in the closed air chamber, reduce the fluctuation of the proportion of different components in the waste gas, and the adsorption fan at the outlet of the air chamber draws the waste gas into the zeolite rotor at a fixed wind speed, while introducing air to maintain a constant air pressure in the air 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 an airflow of a preset temperature 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 of the combustion chamber, calculate the carbon content through the combustion calorific value, output the functional relationship between the carbon content per unit volume of the desorbed gas and the desorption temperature after the zeolite wheel rotates one circle, perform stability test on the function, take the point that meets the stability condition as the stable point, adjust 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 that the desorption temperature remains constant;

[0010] The operation monitoring module is composed of an electronic chip and a driving rotor unit, and 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 of the rotor, and turn off the adsorption fan when the stable point is not obtained, so that the zeolite rotor rotates again until the stable point is obtained;

[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 type of carbon content level, reheat 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 to the heat storage combustion chamber at different temperatures.

[0012] Further, 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] Further, the desorption test module includes: a zeolite rotor unit, a desorption fan unit and a thermal storage combustion unit;

[0016] The zeolite wheel unit is composed of a disc frame and a 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 the 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 deliver the desorbed exhaust gas into the combustion chamber, heat the combustion chamber to a specified temperature, and ignite the exhaust gas.

[0019] Further, 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] Further, 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 wheel, including the rotation speed of the zeolite wheel, 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] Further, 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, and divert 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 and remove inorganic impurities in the tail gas before discharging it.

[0029] A method for intelligent monitoring of equipment status for industrial waste gas treatment comprises the following steps:

[0030] Step S1. A buffer air chamber is provided in front of the zeolite rotor, the air inlet of the buffer air chamber is connected to the exhaust gas emission source, and the air outlet is connected to the adsorption fan, and the adsorption fan extracts the exhaust gas from the buffer air 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, and the heating temperature of the desorption airflow is adjusted so that the temperature of the desorption airflow changes incrementally according to a preset function;

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

[0033] Step S4. The integrals of the first function in adjacent stable points are subtracted 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 the corresponding components are all desorbed, and then the temperature level is 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, and discharge it after removing inorganic impurities.

[0035] Further, step S1 includes:

[0036] Step S11. After filtering out particulate impurities and suspended droplets, the organic industrial waste gas is passed into a buffer air chamber from the air inlet. 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 air chamber outlet is provided with an adsorption fan, which extracts the exhaust gas from the air chamber at a preset constant wind speed and sends it into the adsorption area of ​​the zeolite wheel, and keeps the total amount of the extracted exhaust gas less than the maximum adsorption capacity of the zeolite wheel.

[0038] Further, step S2 includes:

[0039] Step S21. Turn on the driving rotor in the rotor to make the zeolite rotor rotate at a constant speed for one circle, turn on the fan in the desorption area to generate a desorption airflow with a constant wind speed, and preset a temperature change function G(t) so that G(t) changes incrementally on the definition domain, and the value 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 waste gas after desorption, and send the waste gas to the heat storage combustion chamber in real time for ignition treatment.

[0041] Further, step S3 includes:

[0042] Step S31. A temperature monitoring device is provided in the combustion chamber to obtain the temperature change in the combustion chamber when the exhaust gas is burned, and the combustion heat Q of the exhaust gas is calculated, wherein Q = (T1-T0) c, wherein 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 waste 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, wherein 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 that all the value intervals of the independent variable T, where F ’ (T) represents the first-order derivative of the function F(T), u is a 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] Further, step S4 includes:

[0050] Step S41. Subtract the integrals of the first function in 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 specified that a0=1, x0=0, 0 <ai≤1;

[0053] Step S42. When the zeolite wheel rotates again, the desorption fan generates a desorption airflow with a temperature of x1 until all components corresponding to the temperature x1 are desorbed, and the temperature of the desorption fan is increased to x2 until all components corresponding to the temperature x2 are desorbed, and the steps are repeated until the temperature of the desorption fan reaches xn and the temperature in the combustion chamber does not rise any more;

[0054] Step S43. Count the time t used for 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] Further, step S5 includes:

[0056] Step S51. Divide the desorption area into n sector-shaped sub-areas, corresponding to n components in the exhaust gas respectively. The area of ​​the sub-area is determined by the proportion of the component with the corresponding carbon content grade in the exhaust gas. The temperature of the desorption fan is increased once after passing through a sub-area. The sub-areas are connected by a multi-way valve so that the desorption airflow desorbed 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 of 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 beneficial effects achieved by the present invention are:

[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 temperature of the combustion chamber, and then the components of the exhaust gas and the effective desorption temperature are analyzed, which is helpful to control the working 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 to 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 It is a structural schematic diagram of an equipment status intelligent monitoring system for industrial waste gas treatment according to the present invention;

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

[0066] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work 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, including: a buffer gas chamber module, a desorption test module, a component analysis module, an operation monitoring module and a waste gas treatment module;

[0068] The buffer air chamber module is arranged in front of the air inlet of the zeolite rotor, and is used to filter particulate impurities and suspended droplets in the industrial waste gas, fully mix all VOCs generated within a fixed period of time in the closed air chamber, reduce the fluctuation of the proportion of different components in the waste gas, and the adsorption fan at the outlet of the air chamber draws the waste gas into the zeolite rotor at a fixed wind speed, while introducing air to maintain a constant air pressure in the air 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 an airflow of a preset temperature 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 fan unit and a thermal storage combustion unit;

[0074] The zeolite wheel unit is composed of a disc frame and a 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 the 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 deliver 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 of the combustion chamber, calculate the carbon content through the combustion calorific value, output the functional relationship between the carbon content per unit volume of the desorbed gas and the desorption temperature after the zeolite wheel rotates one circle, perform stability test on the function, take the point that meets the stability condition as the stable point, adjust 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 that the desorption temperature remains 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, and 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 of the rotor, and turn off the adsorption fan when the stable point is not obtained, so that the zeolite rotor rotates again until the stable point is obtained;

[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 wheel, including the rotation speed of the zeolite wheel, 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 type of carbon content level, reheat 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 to 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, and divert 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 and remove inorganic impurities in the tail gas before discharging 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 air chamber is provided in front of the zeolite rotor, the air inlet of the buffer air chamber is connected to the exhaust gas emission source, and the air outlet is connected to the adsorption fan, and the adsorption fan extracts the exhaust gas from the buffer air 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 into a buffer air chamber from the air inlet. 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 air chamber outlet is provided with an adsorption fan, which extracts the exhaust gas from the air chamber at a preset constant wind speed and sends it into the adsorption area of ​​the zeolite wheel, and keeps the total amount of the 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, and the heating temperature of the desorption airflow is adjusted so that the temperature of the desorption airflow changes incrementally according to a preset function;

[0096] Step S2 includes:

[0097] Step S21. Turn on the driving rotor in the rotor to make the zeolite rotor rotate at a constant speed for one circle, turn on the fan in the desorption area to generate a desorption airflow with a constant wind speed, and preset a temperature change function G(t) so that G(t) changes incrementally on the definition domain, and the value 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 waste gas after desorption, and send the waste gas to the heat storage combustion chamber in real time for ignition treatment.

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

[0100] Step S3 includes:

[0101] Step S31. A temperature monitoring device is provided in the combustion chamber to obtain the temperature change in the combustion chamber when the exhaust gas is burned, and the combustion heat Q of the exhaust gas is calculated, wherein Q = (T1-T0) c, wherein 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 waste 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, wherein 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 that all the value intervals of the independent variable T, where F ’ (T) represents the first-order derivative of the function F(T), u is a 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. The integrals of the first function in adjacent stable points are subtracted 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 the corresponding components are all desorbed, and then the temperature level is set to the next level until all components are desorbed;

[0109] Step S4 includes:

[0110] Step S41. Subtract the integrals of the first function in 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 proportion 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, a0=1 and x0=0 are specified;

[0113] Step S42. When the zeolite wheel rotates again, the desorption fan generates a desorption airflow with a temperature of x1 until all components corresponding to the temperature x1 are desorbed, and the temperature of the desorption fan is increased to x2 until all components corresponding to the temperature x2 are desorbed, and the steps are repeated until the temperature of the desorption fan reaches xn and the temperature in the combustion chamber does not rise any more;

[0114] Step S43. Count the time t used for 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, and discharge it after removing inorganic impurities.

[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 respectively. The area of ​​the sub-area is determined by the proportion of the component with the corresponding carbon content grade in the exhaust gas. The temperature of the desorption fan is increased once after passing through a sub-area. The sub-areas are connected by a multi-way valve so that the desorption airflow desorbed 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 of 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 air chamber into the zeolite rotor. After the rotor rotates one circle, the desorption fan generates 2m 3 / min of desorption airflow, the initial temperature is 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 at temperatures of 100℃, 250℃ and 400℃ in each area respectively. The exhaust gas after desorption is sent to different combustion chambers.

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

[0122] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is 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 can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope 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 air chamber is provided in front of the zeolite rotor, the air inlet of the buffer air chamber is connected to the exhaust gas emission source, and the air outlet is connected to the adsorption fan, and the adsorption fan extracts the exhaust gas from the buffer air 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, and the heating temperature of the desorption airflow is adjusted so that the temperature of the desorption airflow changes incrementally according to a preset function; Step S3. Ignite the desorption gas flow in the combustion chamber, monitor the heat change inside the combustion chamber, calculate the carbon content of the desorption gas flow, obtain the first function of the carbon content and the desorption temperature, find all the stable points that meet the step condition in the first function, and the desorption temperature corresponding to each stable point is taken as a temperature level; Step S4. The integrals of the first function in adjacent stable points are subtracted 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 the corresponding components are all desorbed, and then the temperature level is set to the next level until all components are desorbed; 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, and discharge it after removing inorganic impurities.

2. The method for intelligent monitoring of equipment status for industrial waste gas treatment according to claim 1 is characterized in that: Step S1 includes: Step S11. After filtering out particulate impurities and suspended droplets, the organic industrial waste gas is passed into a buffer air chamber from the air inlet. 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. The adsorption fan at the outlet of the buffer air chamber extracts the exhaust gas from the air chamber at a preset constant wind speed and sends it to the adsorption area of ​​the zeolite rotor, and keeps the total amount of the extracted exhaust gas less than the maximum adsorption capacity of the zeolite rotor; Step S2 includes: Step S21. Turn on the driving rotor in the rotor to make the zeolite rotor rotate at a constant speed for one circle, turn on the fan in the desorption area to generate a desorption airflow with a constant wind speed, and preset a temperature change function G(t) so that G(t) changes incrementally on the definition domain, and the value range of the function G(t) is greater than the effective desorption temperature range of all exhaust gas components, where t represents time; 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 waste gas after desorption, and send the waste gas to the heat storage combustion chamber in real time for ignition treatment.

3. The method for intelligent monitoring of equipment status for industrial waste gas treatment according to claim 2 is characterized in that: Step S3 includes: Step S31. A temperature monitoring device is provided in the combustion chamber to obtain the temperature change in the combustion chamber when the exhaust gas is burned, and the combustion heat Q of the exhaust gas is calculated, wherein Q = (T1-T0) c, wherein 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 waste 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, wherein 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 that all the value intervals of the independent variable T, where F ’ (T) represents the first-order derivative of the function F(T), u is a 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.

4. The method for intelligent monitoring of equipment status for industrial waste gas treatment according to claim 3 is characterized in that: Step S4 includes: Step S41. Subtract the integrals of the first function in 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: Among them, a i and a i-1 Respectively represent the proportion of the components with the i-th and i-1-th carbon content levels in the exhaust gas, and stipulate that a0=1, x0=0, 0 <ai≤1; Step S42. When the zeolite wheel rotates again, the desorption fan generates a desorption airflow with a temperature of x1 until all components corresponding to the temperature x1 are desorbed, and the temperature of the desorption fan is increased to x2 until all components corresponding to the temperature x2 are desorbed, and the steps are repeated until the temperature of the desorption fan reaches xn and the temperature in the combustion chamber does not rise any more; Step S43. Count the time t used for 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.

5. The method for intelligent monitoring of equipment status for industrial waste gas treatment according to claim 4 is 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 respectively. The area of ​​the sub-area is determined by the proportion of the component with the corresponding carbon content grade in the exhaust gas. The temperature of the desorption fan is increased once after passing through a sub-area. The sub-areas are connected by a multi-way valve so that the desorption airflow desorbed 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 of 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.

6. An intelligent monitoring system for equipment status for industrial waste gas treatment, characterized in that: The system includes the following modules: a buffer gas chamber module, a desorption test module, a component analysis module, an operation supervision module and an exhaust gas treatment module; The buffer air chamber module is arranged in front of the air inlet of the zeolite rotor, and is used to filter particulate impurities and suspended droplets in the industrial waste gas, fully mix all VOCs generated within a fixed period of time in the closed air chamber, reduce the fluctuation of the proportion of different components in the waste gas, and the adsorption fan at the outlet of the air chamber draws the waste gas into the zeolite rotor at a fixed wind speed, while introducing air to maintain a constant air pressure in the air 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 an airflow of a preset temperature 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 of the combustion chamber, calculate the carbon content through the combustion calorific value, output the functional relationship between the carbon content per unit volume of the desorbed gas and the desorption temperature after the zeolite wheel rotates one circle, perform stability test on the function, take the point that meets the stability condition as the stable point, adjust 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 that the desorption temperature remains constant; The operation monitoring module is composed of an electronic chip and a driving rotor unit, and 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 of the rotor, and turn off the adsorption fan when the stable point is not obtained, so that the zeolite rotor rotates again until the stable point is obtained; 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 type of carbon content level, reheat 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 to the heat storage combustion chamber at different temperatures.

7. The intelligent monitoring system for equipment status for industrial waste gas treatment according to claim 6 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.

8. The intelligent monitoring system for equipment status for industrial waste gas treatment according to claim 7 is characterized by: The desorption test module includes: a zeolite rotor unit, a desorption fan unit and a thermal storage combustion unit; The zeolite wheel unit is composed of a disc frame and a 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 the 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 deliver the desorbed exhaust gas into the combustion chamber, heat the combustion chamber to a specified temperature, and ignite the exhaust gas.

9. The intelligent monitoring system for equipment status for industrial waste gas treatment according to claim 8 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 to 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 wheel, including the rotation speed of the zeolite wheel, 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.

10. The intelligent monitoring system for equipment status for industrial waste gas treatment according to claim 9 is characterized in that: 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, and divert 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 and remove inorganic impurities in the tail gas before discharging it.

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