Automatic control system for VOCs waste gas treatment and its use method

Abstract

The present invention provides an automatic control system for VOCs waste gas treatment and a method for using the same, including: a zeolite rotor, the zeolite rotor including an adsorption zone and a desorption zone; a rotor motor connected to the zeolite rotor; an adsorption fan connected to the zeolite rotor; a desorption fan connected to the zeolite rotor; an electric heater connected to the desorption fan; a reactor connected to the electric heater; a purified gas cooling device connected to the reactor, the purified gas cooling device connected to the desorption zone of the zeolite rotor, and a controller connected to the rotor motor, the adsorption fan, the desorption fan, the electric heater, the reactor and the purified gas cooling device. The method for using the system: the desorption fan drives the concentrated VOCs waste gas after desorption into the electric heater for heating, and then enters the reactor and reacts in the reactor to form purified gas; the purified gas must pass through the purified gas cooling device before being discharged to the desorption zone of the zeolite rotor. The system and its method for using the system can realize automatic control of waste gas treatment and avoid energy waste.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment, and in particular to an automatic control system for VOCs waste gas treatment and a use method thereof. Background Art

[0002] VOCs (volatile organic compounds) refers to organic compounds with a saturated vapor pressure greater than 133.32 Pa at room temperature and a boiling point between 50-260°C at normal pressure, or any organic solid or liquid that can volatilize at room temperature and pressure. In this field, zeolite wheels can be used to treat VOCs waste gas. Zeolite wheels can be understood as wheel structures with zeolite loaded on the surface.

[0003] like Figure 1 and Figure 2 As shown, in the existing VOCs waste gas treatment system, the VOCs waste gas enters the integrated box 100 from the air intake pipe 110 under the action of the air intake fan 200, and first passes through the filter device 300, which can remove particles in the waste gas; after the VOCs waste gas passes through the filter device 300, 95% of the VOCs waste gas passes through the adsorption area 410 of the zeolite wheel device 400, and the VOCs are adsorbed by the adsorbent in the adsorption area 410, and the purified gas is discharged from the adsorption area 410 of the zeolite wheel device 400, and then passes through the exhaust fan 600 and the exhaust pipe 120, and is discharged to the outside of the integrated box 100. After the VOCs waste gas passes through the filter device 300, 5% of the VOCs waste gas passes through the cooling zone 420 of the zeolite wheel device 400 to cool the zeolite, and then passes through the heater 520 to form hot air, which passes through the desorption zone 430 of the zeolite wheel device 400; the VOCs adsorbed in the zeolite wheel device 400 are desorbed and concentrated to a degree of 5-15 times under the action of the hot air; the desorbed high-concentration VOCs airflow is pumped by the desorption fan 510 to the regenerative incinerator 530 for combustion treatment, and the discharged clean carbon dioxide and water vapor are discharged to the outside of the integrated box 100 through the exhaust fan 600 and the exhaust pipe 120. The gas discharged from the regenerative incinerator 530 has a certain amount of heat, and the existing VOCs waste gas treatment system cannot realize the recycling of heat, resulting in energy waste. Summary of the invention

[0004] In view of the shortcomings of the prior art mentioned above, the technical problem to be solved by the present invention is to provide an automatic control system for VOCs waste gas treatment that can automatically control waste gas treatment and transport the purified gas with heat to the desorption area for recycling and a method of using the same.

[0005] To achieve the above objectives, an embodiment of the present invention provides an automatic control system for VOCs waste gas treatment, comprising:

[0006] A zeolite rotor, the zeolite rotor comprising an adsorption zone and a desorption zone;

[0007] A rotor motor connected to the zeolite rotor;

[0008] an adsorption fan connected to the adsorption zone of the zeolite rotor;

[0009] a desorption fan, wherein the air inlet of the desorption fan is connected to the air outlet of the desorption zone of the zeolite rotor through a first desorption pipeline;

[0010] An electric heater, wherein the air inlet of the electric heater is connected to the air outlet of the desorption fan;

[0011] A reactor, wherein an air inlet of the reactor is connected to an air outlet of the electric heater;

[0012] A purified gas cooling device, wherein the purified gas inlet of the purified gas cooling device is connected to the gas outlet of the reactor, and the purified gas outlet of the purified gas cooling device is connected to the gas inlet of the desorption zone of the zeolite rotor through a second desorption pipeline;

[0013] A controller is connected to the rotor motor, the adsorption fan, the desorption fan, the electric heater, the reactor and the purified gas cooling device.

[0014] The automatic control system for VOCs waste gas treatment of the present invention, in the initial state, the controller controls the desorption fan to start, the desorption fan drives the gas in the first desorption pipeline to enter the reactor for reaction to form purified gas after being heated by the electric heater, and the purified gas discharged from the reactor passes through the purified gas cooling device and is discharged to the air inlet of the desorption zone of the zeolite rotor; at the same time, the controller controls the adsorption fan to start, the adsorption fan drives the VOCs waste gas to enter the adsorption zone of the zeolite rotor, the VOCs waste gas is adsorbed by the zeolite in the zeolite rotor, and the purified gas after adsorption treatment is discharged;

[0015] The controller controls the rotor motor to start, and the rotor motor drives the zeolite rotor to rotate, so that the zeolite adsorbed with VOCs exhaust gas rotates to the desorption area of ​​the zeolite rotor;

[0016] The desorption fan drives the concentrated VOCs waste gas after desorption to enter the electric heater. After being heated by the electric heater, the concentrated VOCs waste gas enters the reactor. The concentrated VOCs waste gas after desorption reacts in the reactor to form purified gas. The purified gas discharged from the reactor must pass through the purified gas cooling device and then be discharged to the air inlet of the desorption zone of the zeolite rotor to desorb the VOCs waste gas adsorbed on the zeolite.

[0017] The system can realize automatic control of waste gas treatment and transport the purified gas with heat to the desorption area for recycling, thus avoiding energy waste.

[0018] Preferably, the automatic control system for VOCs waste gas treatment includes at least one of the following features:

[0019] 1) The automatic control system further comprises: a desorption inlet temperature monitoring device connected to the controller, wherein the desorption inlet temperature monitoring device is arranged on the air inlet of the desorption zone of the zeolite wheel;

[0020] 2) The automatic control system further comprises: a reaction outlet temperature monitoring device connected to the controller, wherein the reaction outlet temperature monitoring device is arranged on the gas outlet of the reactor.

[0021] The system can adjust the output power of the electric heater and the rotation speed of the zeolite wheel according to the monitored temperature, so that the temperature control in the system is more accurate.

[0022] Preferably, the automatic control system also includes: a wheel motion monitoring device and a desorption inlet temperature monitoring device connected to the controller; the wheel motion monitoring device is arranged on the zeolite wheel; the desorption inlet temperature monitoring device is arranged on the air inlet of the desorption zone of the zeolite wheel.

[0023] This system can monitor the rotation period of the zeolite wheel monitored by the wheel motion monitoring device. When the controller determines that the rotation period of the zeolite wheel becomes larger, the zeolite wheel will stop at a position and the controller will perform a shutdown operation.

[0024] Furthermore, the automatic control system for VOCs waste gas treatment includes at least one of the following features:

[0025] 1) The automatic control system further comprises an air delivery branch, the air delivery branch is connected to the first desorption pipeline, a first control valve is provided on the air delivery branch, and the first control valve is connected to the controller;

[0026] 2) The automatic control system further comprises a purified gas exhaust branch, wherein the purified gas exhaust branch is connected to the second desorption pipeline, and a second control valve is arranged on the purified gas exhaust branch, and the second control valve is connected to the controller.

[0027] In this system, the desorption fan drives the concentrated VOCs waste gas after desorption and the air input from the air delivery branch to the first desorption pipeline to converge into the gas to be purified. The gas to be purified is heated by the electric heater and then enters the reactor. The gas to be purified reacts in the reactor to form purified gas; the purified gas discharged from the reactor passes through the purified gas cooling device and is discharged to the air inlet of the desorption zone of the zeolite rotor;

[0028] In this system, based on the temperature of the air inlet of the desorption zone monitored by the desorption inlet temperature monitoring device, the controller controls the temperature of the electric heater while controlling the second control valve so that the temperature of the air inlet of the desorption zone reaches a preset desorption inlet operating temperature range.

[0029] The system adjusts the opening of the first control valve and the second control valve according to the monitored temperature, so that the temperature control in the system is more accurate.

[0030] Preferably, the purified gas cooling device is a heat exchanger, and an exhaust gas inlet and an exhaust gas outlet are provided on the purified gas cooling device, the exhaust gas inlet is connected to the gas outlet of the desorption zone of the zeolite rotor, and the exhaust gas outlet is connected to the air inlet of the desorption fan through the first desorption pipeline. In this system, the purified gas and the exhaust gas are heat exchanged, so that the heat energy is recycled.

[0031] Furthermore, the purified gas inlet, the purified gas outlet, the exhaust gas inlet and the exhaust gas outlet are all provided with a heat exchange temperature monitoring device, and the heat exchange temperature monitoring device is connected to the controller.

[0032] In this system, based on the temperatures monitored by each of the heat exchange temperature monitoring devices, when the controller determines that the temperature change of the purified gas after heat exchange exceeds a preset range or the temperature change of the exhaust gas after heat exchange exceeds a preset range, the controller shuts down and inspects the purified gas cooling device to ensure the heat exchange efficiency of the purified gas cooling device.

[0033] Preferably, the automatic control system for VOCs waste gas treatment includes at least one of the following features:

[0034] 1) An adsorption inlet temperature monitoring device is provided at the air inlet of the adsorption zone, and an adsorption outlet temperature monitoring device is provided at the air outlet of the adsorption zone, and both the adsorption inlet temperature monitoring device and the adsorption outlet temperature monitoring device are connected to the controller; when the controller determines that the gas temperature difference before and after adsorption exceeds a preset range, the controller shuts down and overhauls the zeolite wheel to ensure the adsorption and desorption efficiency of the zeolite wheel;

[0035] 2) The outlet of the desorption zone is provided with a desorption outlet temperature monitoring device, and the desorption outlet temperature monitoring device is connected to the controller; when the controller determines that the temperature of the outlet of the desorption zone exceeds the preset desorption outlet safety temperature, the controller performs a shutdown operation to avoid the zeolite rotor ignition caused by excessively high temperature in the desorption zone;

[0036] 3) An internal temperature monitoring device is provided inside the electric heater, and the internal temperature monitoring device is connected to the controller; when the controller determines that the temperature inside the electric heater exceeds the preset internal safety temperature, the controller shuts down the electric heater and performs maintenance on the electric heater to ensure the heating performance of the electric heater and prevent the electric heater from being damaged due to high temperature;

[0037] 4) The air inlet of the electric heater is provided with an electric heating inlet temperature monitoring device, and the air outlet of the electric heater is provided with an electric heating outlet temperature monitoring device; the electric heating inlet temperature monitoring device and the electric heating outlet temperature monitoring device are both connected to the controller; when the controller determines that the gas temperature difference before and after heating by the electric heater exceeds a preset range, the controller shuts down the electric heater and performs maintenance on the electric heater to ensure the heating performance of the electric heater and prevent the electric heater from being damaged due to high temperature;

[0038] 5) The adsorption fan is connected to the monitoring end of the first frequency converter, and the data output end of the first frequency converter is connected to the controller; the first frequency converter transmits the current data of the adsorption fan to the controller, and when the controller determines that the current of the adsorption fan exceeds a preset range, the controller performs a shutdown operation to repair the adsorption fan;

[0039] 6) The wheel motor is connected to the monitoring end of the second frequency converter, and the data output end of the second frequency converter is connected to the controller; the second frequency converter transmits the current data of the wheel motor to the controller, and when the controller determines that the current of the wheel motor exceeds a preset range, the controller performs a shutdown operation to repair the wheel motor;

[0040] 7) The desorption fan is connected to the monitoring end of the third frequency converter, and the data output end of the third frequency converter is connected to the controller; the third frequency converter transmits the current data of the desorption fan to the controller, and when the controller determines that the current of the adsorption fan exceeds a preset range, the controller performs a shutdown operation to repair the desorption fan;

[0041] 8) The air inlet of the adsorption zone of the zeolite rotor and the air outlet of the adsorption zone of the zeolite rotor are connected to an adsorption pressure difference monitoring device, and the adsorption pressure difference monitoring device is connected to the controller; when the controller determines that the pressure difference between the air inlet of the adsorption zone and the air outlet of the adsorption zone exceeds a preset range, the controller performs a shutdown operation and repairs the zeolite rotor;

[0042] 9) The air inlet of the desorption zone of the zeolite rotor and the air outlet of the desorption zone of the zeolite rotor are connected to a desorption pressure difference monitoring device, and the desorption pressure difference monitoring device is connected to the controller; when the controller determines that the pressure difference between the air inlet of the desorption zone and the air outlet of the desorption zone exceeds a preset range, the controller performs a shutdown operation and repairs the zeolite rotor;

[0043] 10) The automatic control system for VOCs waste gas treatment also includes a filter, the air outlet of the filter is connected to the air inlet of the adsorption zone of the zeolite wheel; the filter includes at least two layers of filter parts arranged in sequence, and a pre- and post-filtration pressure difference monitoring device is connected between the inlet and outlet of each layer of the filter part, and the pre- and post-filtration pressure difference monitoring device is connected to the controller; when the controller determines that the pressure difference between the inlet and outlet of any layer of the filter part exceeds the preset range, the controller shuts down and inspects the filter part to ensure the filtration efficiency.

[0044] The present invention also relates to a method for using an automatic control system for VOCs waste gas treatment, which is characterized by comprising the following steps:

[0045] In the initial state, the controller controls the desorption fan to start, and the desorption fan drives the gas in the first desorption pipeline to enter the reactor to react and form purified gas after being heated by the electric heater. The purified gas discharged from the reactor passes through the purified gas cooling device and is discharged to the air inlet of the desorption zone of the zeolite rotor; at the same time, the controller controls the adsorption fan to start, and the adsorption fan drives the exhaust gas to enter the adsorption zone of the zeolite rotor, and the VOCs exhaust gas in the exhaust gas is adsorbed by the zeolite in the zeolite rotor, and the purified gas after adsorption treatment is discharged;

[0046] When the VOCs gas adsorbed on the zeolite in the desorption zone is desorbed, the controller controls the rotor motor to start, and the rotor motor drives the zeolite rotor to rotate, so that the zeolite adsorbed with the VOCs waste gas rotates to the desorption zone of the zeolite rotor, and the purified gas discharged from the purified gas cooling device desorbs the VOCs gas adsorbed on the zeolite in the desorption zone; the desorption fan drives the concentrated VOCs waste gas after desorption to enter the reactor after being heated by the electric heater, and the concentrated VOCs waste gas after desorption reacts in the reactor to form purified gas; the purified gas discharged from the reactor passes through the purified gas cooling device and is discharged to the air inlet of the desorption zone of the zeolite rotor.

[0047] The method of this system can realize automatic control of waste gas treatment and transport the purified gas with heat to the desorption zone to desorb the VOCs waste gas adsorbed on the zeolite, thereby realizing the recycling of heat and reducing energy waste.

[0048] Preferably, the method for using the automatic control system for VOCs waste gas treatment includes at least one of the following features:

[0049] 1) The automatic control system further comprises: a desorption inlet temperature monitoring device connected to the controller, wherein the desorption inlet temperature monitoring device is arranged on the air inlet of the desorption zone of the zeolite wheel;

[0050] The method for using the automatic control system further includes: the desorption inlet temperature monitoring device transmits the monitored temperature of the air inlet of the desorption zone to the controller;

[0051] When the controller determines that the temperature of the air inlet of the desorption zone is lower than the preset desorption inlet safety temperature and exceeds the preset desorption inlet working temperature range, the controller controls the output power of the electric heater;

[0052] When the output power of the electric heater is adjusted, when the controller determines that the temperature of the air inlet of the desorption zone reaches the preset desorption inlet operating temperature range, the controller stops controlling the output power of the electric heater; when the controller determines that the temperature of the air inlet of the desorption zone exceeds the preset desorption inlet operating temperature range, the controller controls the wheel motor to adjust the rotation speed of the zeolite wheel;

[0053] After the rotation speed of the zeolite wheel is adjusted, when the controller determines that the temperature of the air inlet of the desorption zone reaches the preset desorption inlet working temperature range, the controller stops controlling the wheel motor; when the controller determines that the temperature of the air inlet of the desorption zone exceeds the preset desorption inlet working temperature range, the controller performs a shutdown operation;

[0054] When the controller determines that the temperature of the air inlet of the desorption zone is higher than the preset desorption inlet safety temperature, the controller performs a shutdown operation;

[0055] 2) The automatic control system further comprises: a reaction outlet temperature monitoring device connected to the controller, wherein the reaction outlet temperature monitoring device is arranged on the gas outlet of the reactor;

[0056] The method for using the automatic control system further includes: a reaction outlet temperature monitoring device transmits the monitored temperature of the gas outlet of the reactor to the controller;

[0057] When the controller determines that the temperature of the gas outlet of the reactor is lower than a preset reaction outlet safety temperature and exceeds a preset reaction outlet operating temperature range, the controller controls the output power of the electric heater;

[0058] After the output power of the electric heater is adjusted, when the controller determines that the temperature of the gas outlet of the reactor reaches the preset reaction outlet working temperature range, the controller stops controlling the output power of the electric heater; when the controller determines that the temperature of the gas outlet of the reactor exceeds the preset reaction outlet working temperature range, the controller controls the rotor motor to adjust the rotation speed of the zeolite rotor;

[0059] After the rotation speed of the zeolite wheel is adjusted, when the controller determines that the temperature of the gas outlet of the reactor reaches the preset reaction outlet working temperature range, the controller stops controlling the wheel motor; when the controller determines that the temperature of the gas outlet of the reactor exceeds the preset reaction outlet working temperature range, the controller performs a shutdown operation;

[0060] When the controller determines that the temperature of the gas outlet of the reactor is higher than the preset reaction outlet safety temperature, the controller performs a shutdown operation.

[0061] The system can adjust the output power of the electric heater and the rotation speed of the zeolite wheel according to the monitored temperature, so that the temperature control in the system is more accurate.

[0062] Preferably, the automatic control system further comprises: a wheel motion monitoring device and a desorption inlet temperature monitoring device connected to the controller; the wheel motion monitoring device is arranged on the zeolite wheel; the desorption inlet temperature monitoring device is arranged on the air inlet of the desorption zone of the zeolite wheel;

[0063] The wheel motion monitoring device transmits the monitored rotation period of the zeolite wheel to the controller. When the controller determines that the rotation period of the zeolite wheel becomes larger, the controller first controls the electric heater to turn off; the desorption inlet temperature monitoring device transmits the monitored temperature of the air inlet of the desorption zone to the controller. When the controller determines that the temperature of the air inlet of the desorption zone is less than or equal to the minimum value of the preset desorption inlet operating temperature range, the controller controls the desorption fan and the adsorption fan to turn off.

[0064] By monitoring the rotation cycle of the zeolite rotor, the normal operation of the zeolite rotor can be ensured. When the electric heater is turned off, the desorption fan and the adsorption fan are in the starting state, so that the gas in the system pipeline can still flow, and after the desorption fan and the adsorption fan gradually cool down the gas, the controller controls the desorption fan and the adsorption fan to be turned off, which can effectively prevent the zeolite rotor from igniting. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] Figure 1This is a schematic diagram of the external structure of a VOCs waste gas treatment system in the prior art.

[0066] Figure 2 This is a schematic diagram of the structure of a VOCs waste gas treatment system in the prior art.

[0067] Figure 3 This is a schematic diagram of the structure of the automatic control system for VOCs waste gas treatment in this embodiment.

[0068] Figure 4 This is a schematic diagram of the structure of the automatic control system for VOCs waste gas treatment in this embodiment.

[0069] Figure 5 This is a control principle diagram of the automatic control system for VOCs waste gas treatment in this embodiment.

[0070] Component number description

[0071] 100 integrated box

[0072] 110 Intake pipe

[0073] 120 Exhaust pipe

[0074] 200 Intake fan

[0075] 300 Filter unit

[0076] 400 Zeolite Wheel Device

[0077] 410 Adsorption Zone

[0078] 420 Cooling Zone

[0079] 430 Desorption zone

[0080] 510 Desorption fan

[0081] 520 Heater

[0082] 530 Regenerative Incinerator

[0083] 600 Exhaust Fan

[0084] 1 Zeolite wheel

[0085] 101 Adsorption Zone

[0086] 1011 Gas outlet of adsorption zone

[0087] 1012 Air inlet of adsorption zone

[0088] 102 Desorption zone

[0089] 1021 Gas outlet of desorption zone

[0090] 1022 Air inlet of desorption zone

[0091] 2 Rotor motor

[0092] 3. Adsorption fan

[0093] 4 Desorption fan

[0094] 41 Air inlet of desorption fan

[0095] 42 Air outlet of desorption fan

[0096] 5. First desorption pipeline

[0097] 6 Electric heater

[0098] 61 Air inlet of electric heater

[0099] 62 Electric heater air outlet

[0100] 7 Reactor

[0101] 71 Reactor gas inlet

[0102] 72 Reactor gas outlet

[0103] 8. Purified gas cooling device

[0104] 81 Purified gas inlet

[0105] 82 Purified gas outlet

[0106] 83 Exhaust gas inlet

[0107] 84 Exhaust gas outlet

[0108] 9 Air delivery branch

[0109] 10. Purified gas exhaust branch

[0110] 11. Second desorption pipeline

[0111] 121 Desorption inlet temperature monitoring device

[0112] 122 Reaction outlet temperature monitoring device

[0113] 123 Heat exchange temperature monitoring device

[0114] 124 Adsorption inlet temperature monitoring device

[0115] 125 Adsorption outlet temperature monitoring device

[0116] 126 Desorption outlet temperature monitoring device

[0117] 127 Internal temperature monitoring device

[0118] 128 Electric heating inlet temperature monitoring device

[0119] 129 Electric heating outlet temperature monitoring device

[0120] 13. Rotor motion monitoring device

[0121] 14 Controller

[0122] 151 First Inverter

[0123] 152 Second inverter

[0124] 153 Third inverter

[0125] 161 Adsorption differential pressure monitoring device

[0126] 162 Desorption pressure difference monitoring device

[0127] 163 Pressure difference monitoring device before and after filtration

[0128] 17 Filters

[0129] 171 Filtration Department

[0130] 181 First Control Valve

[0131] 182 Second control valve DETAILED DESCRIPTION

[0132] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0133] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportion relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0134] like Figure 3 and Figure 5 As shown, this embodiment provides an automatic control system for VOCs waste gas treatment, including:

[0135] The zeolite rotor 1 comprises an adsorption zone 101 and a desorption zone 102;

[0136] A rotor motor 2 connected to the zeolite rotor 1;

[0137] The adsorption fan 3 is connected to the adsorption area 101 of the zeolite rotor 1;

[0138] A desorption fan 4, wherein an air inlet 41 of the desorption fan 4 is connected to an air outlet 1021 of a desorption zone 102 of the zeolite rotor 1 through a first desorption pipeline 5;

[0139] An electric heater 6, wherein an air inlet 61 of the electric heater 6 is connected to an air outlet 42 of the desorption fan 4;

[0140] A reactor 7, wherein an air inlet 71 of the reactor 7 is connected to an air outlet 62 of the electric heater 6;

[0141] A purified gas cooling device 8, wherein the purified gas inlet 81 of the purified gas cooling device 8 is connected to the gas outlet 72 of the reactor 7, and the purified gas outlet 82 of the purified gas cooling device 8 is connected to the gas inlet 1022 of the desorption zone 102 of the zeolite rotor 1 through the second desorption pipeline 11;

[0142] The controller 14 is connected to the rotor motor 2 , the adsorption fan 3 , the desorption fan 4 , the electric heater 6 , the reactor 7 and the purified gas cooling device 8 .

[0143] In the automatic control system for VOCs waste gas treatment of this embodiment, in the initial state, the controller 14 controls the desorption fan 4 to start, and the desorption fan 4 drives the gas in the first desorption pipeline 5 to enter the reactor 7 for reaction to form purified gas after being heated by the electric heater 6. The purified gas discharged from the reactor 7 passes through the purified gas cooling device 8 and is discharged to the air inlet 1022 of the desorption zone 102 of the zeolite rotor 1; at the same time, the controller 14 controls the adsorption fan 3 to start, and the adsorption fan 3 drives the VOCs waste gas to enter the adsorption zone 101 of the zeolite rotor 1, and the VOCs waste gas is adsorbed by the zeolite in the zeolite rotor 1, and the purified gas after adsorption treatment is discharged; in the initial state, the gas in the first desorption pipeline 5 is the VOCs waste gas in the air and the VOCs waste gas remaining from the previous time;

[0144] The controller 14 controls the rotor motor 2 to start, and the rotor motor 2 drives the zeolite rotor 1 to rotate, so that the zeolite adsorbed with the VOCs exhaust gas rotates to the desorption area 102 of the zeolite rotor 1;

[0145] The desorption fan 4 drives the concentrated VOCs waste gas after desorption to enter the electric heater 6. After being heated by the electric heater 6, the concentrated VOCs waste gas enters the reactor 7. The concentrated VOCs waste gas after desorption reacts in the reactor 7 to form purified gas. Since the temperature of the gas discharged from the reactor 7 is relatively high, the purified gas discharged from the reactor 7 must pass through the purified gas cooling device 8 before being discharged to the air inlet 1022 of the desorption zone 102 of the zeolite rotor 1 to desorb the VOCs waste gas adsorbed on the zeolite.

[0146] The system can realize automatic control of waste gas treatment and transport the purified gas with heat to the desorption zone 102 for recycling, thus avoiding energy waste.

[0147] like Figure 3 and Figure 5 As shown, the automatic control system for VOCs waste gas treatment also includes: a desorption inlet temperature monitoring device 121 connected to the controller 14, and the desorption inlet temperature monitoring device 121 is arranged on the air inlet 1022 of the desorption zone 102 of the zeolite rotor 1. The system can adjust the output power of the electric heater 6, or adjust the output power of the electric heater 6 and the rotation speed of the zeolite rotor 1, or perform a shutdown operation according to the temperature monitored by the desorption inlet temperature monitoring device 121.

[0148] The automatic control system for VOCs waste gas treatment also includes: a reaction outlet temperature monitoring device 122 connected to the controller 14, and the reaction outlet temperature monitoring device 122 is arranged on the gas outlet 72 of the reactor 7. The system can adjust the output power of the electric heater 6, or adjust the output power of the electric heater 6 and the rotation speed of the zeolite wheel 1, or perform a shutdown operation according to the temperature monitored by the reaction outlet temperature monitoring device 122.

[0149] The automatic control system also includes: a wheel motion monitoring device 13 and a desorption inlet temperature monitoring device 121 connected to the controller 14; the wheel motion monitoring device 13 is arranged on the zeolite wheel 1; the desorption inlet temperature monitoring device 121 is arranged on the air inlet 1022 of the desorption zone 102 of the zeolite wheel 1.

[0150] According to the rotation period of the zeolite wheel 1 monitored by the wheel motion monitoring device 13, when the controller 14 determines that the rotation period of the zeolite wheel 1 becomes larger, the zeolite wheel 1 will stop at a position, and the controller 14 will perform a shutdown operation; the shutdown operation is specifically: the controller 14 first turns off the electric heater 6, and while turning off the electric heater 6, the desorption fan 4 and the adsorption fan 3 are in the starting state, so that the gas in the system pipeline can still flow, and the desorption fan 4 and the adsorption fan 3 gradually cool down the gas, and when the desorption inlet temperature monitoring device 121 detects that the temperature of the air inlet 1022 of the desorption zone 102 is less than or equal to the minimum value of the desorption inlet working temperature range, the controller 14 controls the desorption fan 4 and the adsorption fan 3 to turn off, which can prevent the zeolite wheel 1 from igniting.

[0151] The automatic control system also includes an air delivery branch 9, which is connected to the first desorption pipeline 5. The air delivery branch 9 is provided with a first control valve 181, which is connected to the controller 14. In this embodiment, the first control valve 181 is a negative pressure air intake valve, which can prevent the concentrated VOCs waste gas from being discharged from the air delivery branch 9.

[0152] The desorption fan 4 drives the concentrated VOCs waste gas after desorption and the air input from the air delivery branch 9 to the first desorption pipeline 5 to converge into the gas to be purified. The gas to be purified is heated by the electric heater 6 and enters the reactor 7. The gas to be purified reacts in the reactor 7 to form purified gas; the purified gas discharged from the reactor 7 passes through the purified gas cooling device 8 and is discharged to the air inlet 1022 of the desorption zone 102 of the zeolite rotor 1;

[0153] According to the temperature of the air inlet 1022 of the desorption zone 102 monitored by the desorption inlet temperature monitoring device 121, the controller 14 controls the first control valve 181 while controlling the temperature of the electric heater 6 so that the temperature of the air inlet 1022 of the desorption zone 102 reaches a preset desorption inlet working temperature range; when the temperature of the air inlet 1022 of the desorption zone 102 is too high, the first control valve 181 is adjusted to reduce the gas temperature in the entire pipeline; or, according to the temperature of the outlet of the reactor 7 monitored by the reaction outlet temperature monitoring device 122, the controller 14 controls the electric heater 6 to adjust the output power while controlling the first control valve 181 to adjust the opening so that the temperature of the outlet of the reactor 7 reaches a preset reaction outlet working temperature range; when the temperature of the outlet of the reactor 7 is too high, the first control valve 181 is adjusted to reduce the gas temperature in the entire pipeline;

[0154] like Figure 3 and Figure 5As shown, the automatic control system further includes a purified gas exhaust branch 10, which is connected to the second desorption pipeline 11. The purified gas exhaust branch 10 is provided with a second control valve 182, which is connected to the controller 14. In this embodiment, the second control valve 182 is an exhaust valve, and when the gas temperature in the second desorption pipeline 11 is too high, the gas in the second desorption pipeline 11 is discharged through the second control valve 182.

[0155] According to the temperature of the air inlet 1022 of the desorption zone 102 monitored by the desorption inlet temperature monitoring device 121, the controller 14 controls the output power of the electric heater 6 to adjust the temperature, and at the same time controls the second control valve 182 so that the temperature of the air inlet 1022 of the desorption zone 102 reaches the preset desorption inlet working temperature range; when the temperature of the air inlet 1022 of the desorption zone 102 is too high, the second control valve 182 is adjusted to a larger size so that more gas with heat is discharged, and the gas temperature in the entire pipeline is reduced; or, according to the temperature of the outlet of the reactor 7 monitored by the reaction outlet temperature monitoring device 122, the controller 14 controls the output power of the electric heater 6 to adjust the temperature, and at the same time controls the second control valve 182 to adjust the opening so that the temperature of the outlet of the reactor 7 reaches the preset reaction outlet working temperature range; when the temperature of the outlet of the reactor 7 is too high, the second control valve 182 is adjusted to a larger size so that more gas with heat is discharged, and the gas temperature in the entire pipeline is reduced;

[0156] This system adjusts the opening of the two valves in the system through the monitored temperature, making the temperature control in the system more accurate.

[0157] like Figure 4 and Figure 5 As shown, the purified gas cooling device 8 is a heat exchanger, and the purified gas cooling device 8 is provided with an exhaust gas inlet 83 and an exhaust gas outlet 84. The exhaust gas inlet 83 is connected to the gas outlet 1021 of the desorption zone 102 of the zeolite rotor 1, and the exhaust gas outlet 84 is connected to the air inlet 41 of the desorption fan 4 through the first desorption pipeline 5. The purified gas and the exhaust gas perform heat exchange in the heat exchanger, so that the heat energy is recycled.

[0158] A heat exchange temperature monitoring device 123 is provided at the purified gas inlet 81 , the purified gas outlet 82 , the exhaust gas inlet 83 and the exhaust gas outlet 84 . The heat exchange temperature monitoring device 123 is connected to the controller 14 .

[0159] In this system, based on the temperatures monitored by each heat exchange temperature monitoring device 123, when the controller 14 determines that the temperature change of the purified gas after heat exchange exceeds the preset range or the temperature change of the exhaust gas after heat exchange exceeds the preset range, the controller 14 shuts down and inspects the purified gas cooling device 8 to ensure the heat exchange efficiency of the purified gas cooling device 8.

[0160] like Figure 4 and Figure 5 As shown, an adsorption inlet temperature monitoring device 124 is provided at the air inlet 1012 of the adsorption zone 101, and an adsorption outlet temperature monitoring device 125 is provided at the air outlet 1011 of the adsorption zone 101, and both the adsorption inlet temperature monitoring device 124 and the adsorption outlet temperature monitoring device 125 are connected to the controller 14; when the controller 14 determines that the gas temperature difference before and after adsorption exceeds a preset range, the controller 14 shuts down the machine and inspects the zeolite wheel 1 to ensure the adsorption and desorption efficiency of the zeolite wheel 1 and ensure that the adsorption and desorption of the zeolite wheel 1 are smooth.

[0161] The gas outlet 1021 of the desorption zone 102 is provided with a desorption outlet temperature monitoring device 126, and the desorption outlet temperature monitoring device 126 is connected to the controller 14; when the controller 14 determines that the temperature of the gas outlet 1021 of the desorption zone 102 exceeds the preset desorption outlet safety temperature, the controller 14 performs a shutdown operation to avoid the zeolite wheel 1 from igniting due to the excessive temperature of the desorption zone 102.

[0162] An internal temperature monitoring device 127 is provided inside the electric heater 6, and the internal temperature monitoring device 127 is connected to the controller 14; when the controller 14 determines that the temperature inside the electric heater 6 exceeds the preset internal safety temperature, the controller 14 performs a shutdown operation to prevent the electric heater 6 from being damaged due to high temperature.

[0163] The air inlet 61 of the electric heater 6 is provided with an electric heating inlet temperature monitoring device 128, and the air outlet 62 of the electric heater 6 is provided with an electric heating outlet temperature monitoring device 129; the electric heating inlet temperature monitoring device 128 and the electric heating outlet temperature monitoring device 129 are both connected to the controller 14. When the controller 14 determines that the temperature difference of the gas before and after heating by the electric heater 6 exceeds a preset range, the controller 14 performs a shutdown operation and performs maintenance on the electric heater 6 to ensure the heating performance of the electric heater 6 and prevent the electric heater 6 from being damaged due to high temperature;

[0164] The adsorption fan 3 is connected to the monitoring end of the first frequency converter 151, and the data output end of the first frequency converter 151 is connected to the controller 14; the first frequency converter 151 transmits the current data of the adsorption fan 3 to the controller 14, and when the controller 14 determines that the current of the adsorption fan 3 exceeds a preset range, it shuts down the fan to inspect and repair the adsorption fan 3.

[0165] The wheel motor 2 is connected to the monitoring end of the second frequency converter 152, and the data output end of the second frequency converter 152 is connected to the controller 14; the second frequency converter 152 transmits the current data of the wheel motor 2 to the controller 14, and when the controller 14 determines that the current of the wheel motor 2 exceeds a preset range, it shuts down the motor to inspect and repair the wheel motor 2.

[0166] The desorption fan 4 is connected to the monitoring end of the third frequency converter 153, and the data output end of the third frequency converter 153 is connected to the controller 14; the third frequency converter 153 transmits the current data of the desorption fan 4 to the controller 14, and when the controller 14 determines that the current of the adsorption fan 4 exceeds the preset range, it shuts down the fan to inspect and repair the desorption fan 4.

[0167] The air inlet 1012 of the adsorption zone 101 of the zeolite wheel 1 and the air outlet 1011 of the adsorption zone 101 of the zeolite wheel 1 are connected to the adsorption pressure difference monitoring device 161, and the adsorption pressure difference monitoring device 161 is connected to the controller 14; when the controller 14 determines that the pressure difference between the air inlet 1012 of the adsorption zone 101 and the air outlet 1011 of the adsorption zone 101 exceeds a preset range, the controller 14 performs a shutdown operation and overhauls the zeolite wheel 1 to ensure the adsorption and desorption efficiency.

[0168] The air inlet 1022 of the desorption zone 102 of the zeolite rotor 1 and the air outlet 1021 of the desorption zone 102 of the zeolite rotor 1 are connected to the desorption pressure difference monitoring device 162, and the desorption pressure difference monitoring device 162 is connected to the controller 14; when the controller 14 determines that the pressure difference between the air inlet 1022 of the desorption zone 102 and the air outlet 1021 of the desorption zone 102 exceeds a preset range, the controller 14 performs a shutdown operation and overhauls the zeolite rotor 1 to ensure the adsorption and desorption efficiency.

[0169] The automatic control system for VOCs waste gas treatment also includes a filter 17, the air outlet of the filter 17 is connected to the air inlet 1012 of the adsorption area 101 of the zeolite wheel 1; the filter 17 includes at least two layers of filter parts 171 arranged in sequence, and the inlet and outlet of each layer of the filter part 171 are connected to the pre-filtering pressure difference monitoring device 163, and the pre-filtering pressure difference monitoring device 163 is connected to the controller 14. When the controller 14 determines that the pressure difference between the inlet and outlet of any layer of the filter part 171 exceeds the preset range, the controller 14 performs a shutdown operation and inspects the filter part 171 to ensure the filtering efficiency.

[0170] This embodiment also provides a method for using an automatic control system for VOCs waste gas treatment, comprising the following steps:

[0171] In the initial state, the controller 14 controls the desorption fan 4 to start, and the desorption fan 4 drives the gas in the first desorption pipeline 5 to pass through the electric heater 6 for heating, and then enters the reactor 7 for reaction to form purified gas. The purified gas discharged from the reactor 7 passes through the purified gas cooling device 8 and is discharged to the air inlet 1022 of the desorption zone 102 of the zeolite rotor 1; at the same time, the controller 14 controls the adsorption fan 3 to start, and the adsorption fan 3 drives the exhaust gas to enter the adsorption zone 101 of the zeolite rotor 1, and the VOCs exhaust gas in the exhaust gas is adsorbed by the zeolite in the zeolite rotor 1, and the purified gas after adsorption treatment is discharged;

[0172] When the VOCs gas adsorbed on the zeolite in the desorption zone 102 is desorbed, the controller 14 controls the rotor motor 2 to start, and the rotor motor 2 drives the zeolite rotor 1 to rotate, so that the zeolite adsorbed with the VOCs waste gas rotates to the desorption zone 102 of the zeolite rotor 1, and the purified gas discharged from the purified gas cooling device 8 desorbs the VOCs gas adsorbed on the zeolite in the desorption zone 102; the desorption fan 4 drives the concentrated VOCs waste gas after desorption to enter the reactor 7 after being heated by the electric heater 6, and the concentrated VOCs waste gas after desorption reacts in the reactor 7 to form purified gas; the purified gas discharged from the reactor 7 passes through the purified gas cooling device 8 and is discharged to the air inlet 1022 of the desorption zone 102 of the zeolite rotor 1.

[0173] The method of the system can realize automatic control of waste gas treatment and transport the purified gas with heat to the desorption zone 102 to desorb the VOCs waste gas adsorbed on the zeolite, thereby realizing the recycling of heat and reducing energy waste.

[0174] The automatic control system for VOCs waste gas treatment also includes: a desorption inlet temperature monitoring device 121 connected to the controller 14, and the desorption inlet temperature monitoring device 121 is arranged on the air inlet 1022 of the desorption zone 102 of the zeolite wheel 1;

[0175] The method for using the automatic control system for VOCs waste gas treatment also includes: the desorption inlet temperature monitoring device 121 transmits the monitored temperature of the air inlet 1022 of the desorption zone 102 to the controller 14;

[0176] When the controller 14 determines that the temperature of the air inlet 1022 of the desorption zone 102 is lower than the preset desorption inlet safety temperature and exceeds the preset desorption inlet operating temperature range, the controller 14 controls the output power of the electric heater 6;

[0177] When the output power of the electric heater 6 is adjusted, when the controller 14 determines that the temperature of the air inlet 1022 of the desorption zone 102 reaches the preset desorption inlet operating temperature range, the controller 14 stops controlling the output power of the electric heater 6; when the controller 14 determines that the temperature of the air inlet 1022 of the desorption zone 102 exceeds the preset desorption inlet operating temperature range, the controller 14 controls the wheel motor 2 to adjust the rotation speed of the zeolite wheel 1;

[0178] After the rotation speed of the zeolite wheel 1 is adjusted, when the controller 14 determines that the temperature of the air inlet 1022 of the desorption zone 102 reaches the preset desorption inlet working temperature range, the controller 14 stops controlling the wheel motor 2; when the controller 14 determines that the temperature of the air inlet 1022 of the desorption zone 102 exceeds the preset desorption inlet working temperature range, the controller 14 performs a shutdown operation;

[0179] When the controller 14 determines that the temperature of the air inlet 1022 of the desorption zone 102 is higher than the preset desorption inlet safety temperature, the controller 14 performs a shutdown operation;

[0180] The preset desorption inlet safety temperature is greater than the maximum value of the preset desorption inlet working temperature. In this embodiment, the preset desorption inlet safety temperature is 100° C., and the preset desorption inlet working temperature range is 50-57° C. The system can adjust the output power of the electric heater 6 first and then adjust the rotation speed of the zeolite wheel 1 according to the monitored temperature of the air inlet 1022 of the desorption zone 102 of the zeolite wheel 1, so that the temperature of the air inlet 1022 of the desorption zone 102 in the system can be more accurately controlled.

[0181] The automatic control system for VOCs waste gas treatment also includes: a reaction outlet temperature monitoring device 122 connected to the controller 14, and the reaction outlet temperature monitoring device 122 is arranged on the gas outlet 72 of the reactor 7;

[0182] The method of using the automatic control system further includes: the reaction outlet temperature monitoring device 122 transmits the monitored temperature of the gas outlet 72 of the reactor 7 to the controller 14;

[0183] When the controller 14 determines that the temperature of the gas outlet 72 of the reactor 7 is lower than the preset reaction outlet safety temperature and exceeds the preset reaction outlet working temperature range, the controller 14 controls the output power of the electric heater 6;

[0184] After the output power of the electric heater 6 is adjusted, when the controller 14 determines that the temperature of the gas outlet 72 of the reactor 7 reaches the preset reaction outlet working temperature range, the controller 14 stops controlling the output power of the electric heater 6; when the controller 14 determines that the temperature of the gas outlet 72 of the reactor 7 exceeds the preset reaction outlet working temperature range, the controller 14 controls the rotor motor 2 to adjust the rotation speed of the zeolite rotor 1;

[0185] After the rotation speed of the zeolite wheel 1 is adjusted, when the controller 14 determines that the temperature of the gas outlet 72 of the reactor 7 reaches the preset reaction outlet working temperature range, the controller 14 stops controlling the wheel motor 2; when the controller 14 determines that the temperature of the gas outlet 72 of the reactor 7 exceeds the preset reaction outlet working temperature range, the controller 14 performs a shutdown operation;

[0186] When the controller 14 determines that the temperature of the gas outlet 72 of the reactor 7 is higher than the preset reaction outlet safety temperature, the controller 14 performs a shutdown operation.

[0187] The preset reaction outlet safety temperature is greater than the preset maximum value of the reaction outlet safety temperature. In this embodiment, the preset desorption inlet safety temperature is 450° C., and the preset desorption inlet working temperature range is 330-380° C. The system can adjust the output power of the electric heater 6 first and then adjust the rotation speed of the zeolite wheel 1 according to the monitored temperature of the gas outlet 72 of the reactor 7, so that the temperature of the gas outlet 72 of the reactor 7 in the system can be controlled more accurately.

[0188] The automatic control system further comprises: a rotor motion monitoring device 13 and a desorption inlet temperature monitoring device 121 connected to the controller 14; the rotor motion monitoring device 13 is arranged on the zeolite rotor 1; the desorption inlet temperature monitoring device 121 is arranged on the air inlet 1022 of the desorption zone 102 of the zeolite rotor 1;

[0189] The wheel motion monitoring device 13 transmits the monitored rotation period of the zeolite wheel 1 to the controller 14. When the controller 14 determines that the rotation period of the zeolite wheel 1 becomes larger, the controller 14 first controls the electric heater 6 to turn off; the desorption inlet temperature monitoring device 121 transmits the monitored temperature of the air inlet 1022 of the desorption zone 102 to the controller 14. When the controller 14 determines that the temperature of the air inlet 1022 of the desorption zone 102 is less than or equal to the minimum value of the preset desorption inlet operating temperature range, the controller 14 controls the desorption fan 4 and the adsorption fan 3 to turn off.

[0190] By monitoring the rotation cycle of the zeolite wheel 1, the normal operation of the zeolite wheel 1 can be ensured. When the electric heater 6 is turned off, the desorption fan 4 and the adsorption fan 3 are in the starting state, so that the gas in the system pipeline can still flow, and the desorption fan 4 and the adsorption fan 3 gradually cool the gas. When the controller 14 determines that the temperature of the air inlet 1022 of the desorption zone 102 is less than or equal to the minimum value of the preset desorption inlet working temperature range, the controller 14 controls the desorption fan 4 and the adsorption fan 3 to be turned off, which can effectively prevent the zeolite wheel 1 from igniting.

[0191] The automatic control system for VOCs waste gas treatment of this embodiment and its use method can realize automatic and continuous treatment of VOCs waste gas, and the automatic control system can operate safely, stably and effectively, and can be unattended.

[0192] In summary, the present invention effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0193] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. An automatic control system for VOCs waste gas treatment, characterized in that: include: A zeolite rotor (1), the zeolite rotor (1) comprising an adsorption zone (101) and a desorption zone (102); A rotor motor (2) connected to the zeolite rotor (1); an adsorption fan (3) connected to the adsorption zone (101) of the zeolite rotor (1); A desorption fan (4), wherein an air inlet (41) of the desorption fan (4) is connected to an air outlet (1021) of a desorption zone (102) of the zeolite rotor (1) via a first desorption pipeline (5); An electric heater (6), wherein an air inlet (61) of the electric heater (6) is connected to an air outlet (42) of the desorption fan (4); A reactor (7), wherein the air inlet (71) of the reactor (7) is connected to the air outlet (62) of the electric heater (6); a purified gas cooling device (8), wherein the purified gas inlet (81) of the purified gas cooling device (8) is connected to the air outlet (72) of the reactor (7), and the purified gas outlet (82) of the purified gas cooling device (8) is connected to the air inlet (1022) of the desorption zone (102) of the zeolite rotor (1) via a second desorption pipeline (11); a controller (14), wherein the controller (14) is connected to the rotor motor (2), the adsorption fan (3), the desorption fan (4), the electric heater (6), the reactor (7) and the purified gas cooling device (8); The automatic control system for VOCs waste gas treatment includes at least one of the following features: 1) The automatic control system further comprises: a desorption inlet temperature monitoring device (121) connected to the controller (14), wherein the desorption inlet temperature monitoring device (121) is arranged on the air inlet (1022) of the desorption zone (102) of the zeolite rotor (1); 2) The automatic control system further comprises: a reaction outlet temperature monitoring device (122) connected to the controller (14), wherein the reaction outlet temperature monitoring device (122) is arranged on the gas outlet (72) of the reactor (7); The automatic control system for VOCs waste gas treatment further comprises: a wheel motion monitoring device (13) and a desorption inlet temperature monitoring device (121) connected to the controller (14); the wheel motion monitoring device (13) is arranged on the zeolite wheel (1); the desorption inlet temperature monitoring device (121) is arranged on the air inlet (1022) of the desorption zone (102) of the zeolite wheel (1); The automatic control system for VOCs waste gas treatment includes at least one of the following features: 1) The automatic control system further comprises an air delivery branch (9), wherein the air delivery branch (9) is connected to the first desorption pipeline (5), and a first control valve (181) is provided on the air delivery branch (9), and the first control valve (181) is connected to the controller (14); 2) The automatic control system further comprises a purified gas exhaust branch (10), wherein the purified gas exhaust branch (10) is connected to the second desorption pipeline (11), and a second control valve (182) is provided on the purified gas exhaust branch (10), and the second control valve (182) is connected to the controller (14).

2. The automatic control system for VOCs waste gas treatment according to claim 1, characterized in that: The purified gas cooling device (8) is a heat exchanger, and is provided with an exhaust gas inlet (83) and an exhaust gas outlet (84). The exhaust gas inlet (83) is connected to the exhaust port (1021) of the desorption zone (102) of the zeolite rotor (1), and the exhaust gas outlet (84) is connected to the exhaust port (41) of the desorption fan (4) through the first desorption pipeline (5).

3. The automatic control system for VOCs waste gas treatment according to claim 2 is characterized in that: The purified gas inlet (81), the purified gas outlet (82), the waste gas inlet (83) and the waste gas outlet (84) are all provided with a heat exchange temperature monitoring device (123), and the heat exchange temperature monitoring device (123) is connected to the controller (14).

4. The automatic control system for VOCs waste gas treatment according to claim 1 is characterized in that: Includes at least one of the following features: 1) an adsorption inlet temperature monitoring device (124) is provided at the air inlet (1012) of the adsorption zone (101), and an adsorption outlet temperature monitoring device (125) is provided at the air outlet (1011) of the adsorption zone (101), and both the adsorption inlet temperature monitoring device (124) and the adsorption outlet temperature monitoring device (125) are connected to the controller (14); 2) The gas outlet (1021) of the desorption zone (102) is provided with a desorption outlet temperature monitoring device (126), and the desorption outlet temperature monitoring device (126) is connected to the controller (14); 3) An internal temperature monitoring device (127) is provided inside the electric heater (6), and the internal temperature monitoring device (127) is connected to the controller (14); 4) The air inlet (61) of the electric heater (6) is provided with an electric heating inlet temperature monitoring device (128), and the air outlet (62) of the electric heater (6) is provided with an electric heating outlet temperature monitoring device (129); the electric heating inlet temperature monitoring device (128) and the electric heating outlet temperature monitoring device (129) are both connected to the controller (14); 5) The adsorption fan (3) is connected to the monitoring end of the first frequency converter (151), and the data output end of the first frequency converter (151) is connected to the controller (14); 6) The wheel motor (2) is connected to the monitoring end of the second frequency converter (152), and the data output end of the second frequency converter (152) is connected to the controller (14); 7) The desorption fan (4) is connected to the monitoring end of the third frequency converter (153), and the data output end of the third frequency converter (153) is connected to the controller (14); 8) the air inlet (1012) of the adsorption zone (101) of the zeolite rotor (1) and the air outlet (1011) of the adsorption zone (101) of the zeolite rotor (1) are connected to an adsorption differential pressure monitoring device (161), and the adsorption differential pressure monitoring device (161) is connected to the controller (14); 9) the air inlet (1022) of the desorption zone (102) of the zeolite rotor (1) and the air outlet (1021) of the desorption zone (102) of the zeolite rotor (1) are connected to a desorption differential pressure monitoring device (162), and the desorption differential pressure monitoring device (162) is connected to the controller (14); 10) The automatic control system for VOCs waste gas treatment also includes a filter (17), the air outlet of the filter (17) is connected to the air inlet (1012) of the adsorption zone (101) of the zeolite wheel (1); the filter (17) includes at least two layers of filter parts (171) arranged in sequence, and a pre- and post-filtration pressure difference monitoring device (163) is connected between the inlet and outlet of each layer of the filter part (171), and the pre- and post-filtration pressure difference monitoring device (163) is connected to the controller (14).

5. A method for using the automatic control system for VOCs waste gas treatment as claimed in claim 1, characterized in that: The following steps are involved: In the initial state, the controller (14) controls the desorption fan (4) to start, and the desorption fan (4) drives the gas in the first desorption pipeline (5) to pass through the electric heater (6) for heating, and then enters the reactor (7) for reaction to form purified gas. The purified gas discharged from the reactor (7) passes through the purified gas cooling device (8) and is discharged to the air inlet (1022) of the desorption zone (102) of the zeolite rotor (1); at the same time, the controller (14) controls the adsorption fan (3) to start, and the adsorption fan (3) drives the exhaust gas to enter the adsorption zone (101) of the zeolite rotor (1), and the VOCs exhaust gas in the exhaust gas is adsorbed by the zeolite in the zeolite rotor (1), and the purified gas after adsorption treatment is discharged; When the VOCs gas adsorbed on the zeolite in the desorption zone (102) is desorbed, the controller (14) controls the rotor motor (2) to start, and the rotor motor (2) drives the zeolite rotor (1) to rotate, so that the zeolite adsorbed with the VOCs waste gas rotates to the desorption zone (102) of the zeolite rotor (1), and the purified gas discharged from the purified gas cooling device (8) desorbs the VOCs gas adsorbed on the zeolite in the desorption zone (102); the desorption fan (4) drives the concentrated VOCs waste gas after desorption to enter the reactor (7) after being heated by the electric heater (6), and the concentrated VOCs waste gas after desorption reacts in the reactor (7) to form purified gas; the purified gas discharged from the reactor (7) passes through the purified gas cooling device (8) and is discharged to the air inlet (1022) of the desorption zone (102) of the zeolite rotor (1).

6. The method for using the automatic control system for VOCs waste gas treatment according to claim 5, characterized in that: Includes at least one of the following features: 1) The automatic control system further comprises: a desorption inlet temperature monitoring device (121) connected to the controller (14), wherein the desorption inlet temperature monitoring device (121) is arranged on the air inlet (1022) of the desorption zone (102) of the zeolite rotor (1); The method for using the automatic control system further comprises: a desorption inlet temperature monitoring device (121) transmits the monitored temperature of the air inlet (1022) of the desorption zone (102) to the controller (14); When the controller (14) determines that the temperature of the air inlet (1022) of the desorption zone (102) is lower than a preset desorption inlet safety temperature and exceeds a preset desorption inlet operating temperature range, the controller (14) controls the output power of the electric heater (6); When the output power of the electric heater (6) is adjusted, the controller (14) determines that the temperature of the air inlet (1022) of the desorption zone (102) reaches a preset desorption inlet operating temperature range, and the controller (14) stops controlling the output power of the electric heater (6); when the controller (14) determines that the temperature of the air inlet (1022) of the desorption zone (102) exceeds the preset desorption inlet operating temperature range, the controller (14) controls the wheel motor (2) to adjust the rotation speed of the zeolite wheel (1); After the rotation speed of the zeolite wheel (1) is adjusted, when the controller (14) determines that the temperature of the air inlet (1022) of the desorption zone (102) reaches a preset desorption inlet operating temperature range, the controller (14) stops controlling the wheel motor (2); when the controller (14) determines that the temperature of the air inlet (1022) of the desorption zone (102) exceeds the preset desorption inlet operating temperature range, the controller (14) performs a shutdown operation; When the controller (14) determines that the temperature of the air inlet (1022) of the desorption zone (102) is higher than a preset desorption inlet safety temperature, the controller (14) performs a shutdown operation; 2) The automatic control system further comprises: a reaction outlet temperature monitoring device (122) connected to the controller (14), wherein the reaction outlet temperature monitoring device (122) is arranged on the gas outlet (72) of the reactor (7); The method for using the automatic control system further comprises: a reaction outlet temperature monitoring device (122) transmits the monitored temperature of the gas outlet (72) of the reactor (7) to the controller (14); When the controller (14) determines that the temperature of the gas outlet (72) of the reactor (7) is lower than a preset reaction outlet safety temperature and exceeds a preset reaction outlet operating temperature range, the controller (14) controls the output power of the electric heater (6); After the output power of the electric heater (6) is adjusted, when the controller (14) determines that the temperature of the gas outlet (72) of the reactor (7) reaches a preset reaction outlet operating temperature range, the controller (14) stops controlling the output power of the electric heater (6); when the controller (14) determines that the temperature of the gas outlet (72) of the reactor (7) exceeds the preset reaction outlet operating temperature range, the controller (14) controls the rotor motor (2) to adjust the rotation speed of the zeolite rotor (1); After the rotation speed of the zeolite wheel (1) is adjusted, when the controller (14) determines that the temperature of the gas outlet (72) of the reactor (7) reaches a preset reaction outlet operating temperature range, the controller (14) stops controlling the wheel motor (2); when the controller (14) determines that the temperature of the gas outlet (72) of the reactor (7) exceeds the preset reaction outlet operating temperature range, the controller (14) performs a shutdown operation; When the controller (14) determines that the temperature of the gas outlet (72) of the reactor (7) is higher than a preset reaction outlet safety temperature, the controller (14) performs a shutdown operation.

7. The method for using the automatic control system for VOCs waste gas treatment according to claim 5, characterized in that: The automatic control system further comprises: a wheel motion monitoring device (13) and a desorption inlet temperature monitoring device (121) connected to the controller (14); the wheel motion monitoring device (13) is arranged on the zeolite wheel (1); the desorption inlet temperature monitoring device (121) is arranged on the air inlet (1022) of the desorption zone (102) of the zeolite wheel (1); The wheel motion monitoring device (13) transmits the rotation period of the zeolite wheel (1) monitored to the controller (14); when the controller (14) determines that the rotation period of the zeolite wheel (1) becomes larger, the controller (14) first controls the electric heater (6) to be turned off; the desorption inlet temperature monitoring device (121) transmits the temperature of the air inlet (1022) of the desorption zone (102) monitored to the controller (14); when the controller (14) determines that the temperature of the air inlet (1022) of the desorption zone (102) is less than or equal to the minimum value of the preset desorption inlet working temperature range, the controller (14) controls the desorption fan (4) and the adsorption fan (3) to be turned off.

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