Heat source utilization and cold supplement safety system suitable for adsorption and desorption catalytic combustion process

Abstract

A heat source utilization and cold supplement safety system suitable for an adsorption and desorption catalytic combustion process comprises an adsorption box, a catalytic combustion furnace, a desorption fan, a fresh air fan, a temperature control switch and a controller, a second exhaust port in the adsorption box is connected with a third air inlet in the catalytic combustion furnace through a desorption pipeline, and a third exhaust port in the catalytic combustion furnace is connected with the desorption fan. An outlet of the desorption fan is connected with a second air inlet in the adsorption box through an inner circulation pipeline, the fresh air fan is connected to a branch of a second exhaust pipeline, when the temperature in the furnace is too high, cold air enters the catalytic combustion furnace through the adsorption box, and high-temperature gas in the furnace is exhausted; the temperature control switch is arranged in the catalytic combustion furnace and used for controlling starting of the cold supplementing system through physical deformation signals of the bimetallic strip, and the temperature control switch can be used in cooperation with a thermocouple to control the furnace temperature and the box temperature. According to the utility model, rapid cooling can be realized, the stability and safety of equipment operation are improved, a heat source is fully utilized, and the energy consumption and accident rate are reduced.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, and in particular to a heat source utilization and cooling safety system suitable for adsorption-desorption catalytic combustion processes. Background Technology

[0002] Adsorption-desorption catalytic combustion is a highly efficient organic waste gas treatment technology that combines the advantages of activated carbon adsorption and catalytic combustion, effectively removing organic pollutants from waste gas. This process primarily involves activated carbon in an adsorption chamber adsorbing organic waste gas. Once the activated carbon is saturated, hot air desorbs the waste gas, which then enters a catalytic combustion furnace for catalytic combustion, resulting in harmless gases that are then discharged. A portion of the hot air from the catalytic combustion furnace can enter the adsorption chamber to desorb the activated carbon. Both adsorption and desorption processes within the adsorption chamber must occur within a specific temperature range. For adsorption, excessively high temperatures negatively impact the adsorption effect; for desorption, excessively low temperatures negatively impact the desorption effect. Excessively high temperatures can damage the structure of the activated carbon, affecting its performance and potentially causing spontaneous combustion and safety hazards. Therefore, temperature control within the adsorption chamber is crucial, typically achieved by installing thermocouples for real-time temperature monitoring.

[0003] To ensure effective catalytic combustion of organic waste gas in the catalytic combustion furnace, the furnace temperature must be controlled to maintain a specific temperature. Since the catalytic combustion process releases heat, the heating module needs to be stopped at appropriate times, and the furnace temperature must be controlled simultaneously. This is to prevent excessively high temperatures from damaging the catalyst and reducing its lifespan, and to prevent the combustion of organic gases from causing explosions or other safety accidents. Thermocouples are typically installed inside the furnace. While thermocouples offer advantages such as a wide measurement range and high accuracy, they are susceptible to environmental factors such as temperature, humidity, and electromagnetic interference because they convert temperature limits into electromotive force (EMF) and then calculate the measured temperature. Therefore, they require appropriate compensation and calibration before use, and frequent maintenance and calibration during operation. Otherwise, incorrect current signals transmitted by the temperature sensor may occur, leading to excessively high temperatures, equipment damage, or even fires. Practice has shown that accidents caused by this reason frequently occur in actual production. Furthermore, for adsorption-desorption catalytic combustion processes with multiple potential safety hazards and high risk factors, simple temperature control is insufficient to meet increasingly stringent safety requirements. At the same time, energy conservation is also something that enterprises need to consider in production. Activated carbon desorption and catalytic combustion of organic waste gas both require heat energy, but the catalytic combustion process generates heat. How to make more effective use of this heat to fully utilize the heat source is also a major research topic. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a stable, safe, and efficient heat source utilization and cooling safety system suitable for adsorption-desorption catalytic combustion processes.

[0005] This utility model is achieved through the following technical solution:

[0006] A heat source utilization and cooling safety system suitable for adsorption-desorption catalytic combustion processes includes an adsorption box, a catalytic combustion furnace, a desorption fan, a fresh air fan, a temperature control switch, and a controller. The adsorption box is equipped with a first air inlet, a second air inlet, a fresh air inlet, a first exhaust port, and a second exhaust port. The first air inlet is connected to an organic waste gas pipeline for introducing the organic waste gas to be treated. The fresh air inlet is connected to a fresh air pipeline for introducing cold air. The second air inlet is connected to an internal circulation pipeline. The first exhaust port is connected to a first exhaust pipeline for discharging gas that meets emission standards after adsorption treatment. The catalytic combustion furnace is equipped with a third air inlet and a third exhaust port. The second exhaust port on the adsorption box is connected to the third air inlet on the catalytic combustion furnace via a desorption pipeline. The third air inlet is also connected to an air intake pipeline. The pipeline is used to introduce air. The third exhaust port is connected to the second exhaust pipeline, which is connected to the desorption fan. The outlet of the desorption fan is connected to the second air inlet on the adsorption box through the internal circulation pipeline. This is used to introduce hot air into the adsorption box for desorption and to allow the desorbed gas in the adsorption box to enter the catalytic combustion furnace. The fresh air fan is connected to a branch of the second exhaust pipeline. When the temperature inside the catalytic combustion furnace is too high, it is used to allow cold air to enter the catalytic combustion furnace through the adsorption box and to discharge the high-temperature gas inside the catalytic combustion furnace. The temperature control switch is installed inside the catalytic combustion furnace. The temperature sensing element of the temperature control switch is a bimetallic strip. The temperature control switch is used to trigger a signal by the deformation of the bimetallic strip at a set temperature. The controller is connected to the temperature control switch and is used to receive the trigger signal from the temperature control switch to control the shutdown of the heating module, the startup of the fresh air fan, and the shutdown of the desorption fan.

[0007] Furthermore, a first thermocouple is installed in the adsorption box, and a second thermocouple is installed in the catalytic combustion furnace. The first thermocouple and the second thermocouple are respectively connected to the controller. The controller is used to control the start and stop of the heating module, fresh air fan and desorption fan in the catalytic combustion furnace according to the electrical signal converted from the temperature signal transmitted by the first thermocouple and the second thermocouple.

[0008] Furthermore, the adsorption box is provided with three in parallel, the internal circulation pipe is connected to the second air inlet of the three adsorption boxes respectively, and the desorption pipe is connected to the second exhaust port of the three adsorption boxes respectively.

[0009] Furthermore, a first valve is installed on the organic waste gas pipeline, a second valve is installed on the fresh air pipeline, a third valve is installed on the internal circulation pipeline, a fourth valve is installed on the first exhaust pipeline, a fifth valve is installed on the desorption pipeline, a sixth valve is installed on the air inlet pipeline, a seventh valve is installed between the second exhaust pipeline and the desorption fan, and an eighth valve is installed on the branch connecting the fresh air fan. The controller is connected to the first, second, third, fourth, fifth, sixth, seventh, and eighth valves respectively, and is used to control the first, third, fourth, sixth, and seventh valves to be closed and the second, fifth, and eighth valves to be open when the temperature inside the catalytic combustion furnace exceeds the set value.

[0010] Furthermore, the adsorption boxes are arranged in parallel with three of them, and the internal circulation pipes are respectively connected to the second air inlets of the three adsorption boxes, and the second air inlet of each adsorption box is connected to the internal circulation pipe through a third valve; the desorption pipes are respectively connected to the second exhaust ports of the three adsorption boxes, and the second exhaust port of each adsorption box is connected to the desorption pipe through a ninth valve.

[0011] Furthermore, the adsorption box includes an outer shell and an activated carbon adsorption bed and a fire-fighting pipe disposed within the outer shell. The fire-fighting pipe is positioned above the activated carbon adsorption bed and is equipped with several nozzles and a spray valve. The controller is electrically connected to the spray valve and is used to control the opening of the spray valve to spray water when the temperature inside the adsorption box exceeds a warning temperature. The first air inlet, the second air inlet, and the fresh air inlet are located at the bottom of the outer shell, while the first exhaust port and the second exhaust port are located at the top of the outer shell. An aluminum silicate insulation layer is disposed inside the outer shell.

[0012] Further, the catalytic combustion furnace includes a sealing cover and a heat exchange module, a catalytic combustion module, and a heating module disposed within the sealing cover. The heat exchange module, catalytic combustion module, and heating module are arranged sequentially from top to bottom. The heat exchange module includes a first shell and a plurality of vertically arranged vent pipes disposed within the first shell, with a pre-set gap between the vent pipes allowing gas to pass through. A third air inlet is disposed on the side of the sealing cover near the first shell and is connected to the first shell. A third exhaust port is disposed at the top of the sealing cover and is connected to the first shell. The catalytic combustion module includes a second shell and a plurality of catalytic layers disposed within the second shell, with the top of the second shell connected to the vent pipes. The heating module includes a third... The housing consists of a shell and several heating elements disposed within the third shell. Gaps are pre-set between the heating elements to allow vertical gas passage. The top of the third shell is connected to the bottom of the second shell, and an air inlet is provided at the bottom of the third shell. Gaps for gas passage are reserved between the sides of the first shell, the second shell, the third shell, and the bottom of the third shell and the sealing cover, and these gaps are vertically connected. This allows gas entering through the third air inlet to be preheated by the heat exchange module, then sequentially pass through the gaps between the sides of the first shell and the sealing cover, the second shell and the sealing cover, the third shell and the sealing cover, and the bottom of the third shell and the sealing cover, before entering the vent pipes in the heating module, the catalytic combustion module, and the heat exchange module, and finally exiting through the third exhaust port.

[0013] Furthermore, a horizontal partition is provided inside the first housing, which divides the space inside the first housing into upper and lower layers. The vent pipe passes through the horizontal partition, and the third air inlet is located near the upper layer of the first housing. After the gas is preheated in the upper layer of the first housing, it enters the lower layer of the first housing through the gap between the first housing and the sealing cover for further preheating, and then enters the gap between the second housing and the sealing cover through the gap between the first housing and the sealing cover.

[0014] Furthermore, the catalyst layer is provided with three layers, each of which includes a support frame and a platinum precious metal supported catalyst honeycomb block disposed on the support frame.

[0015] Furthermore, a stainless steel outer shell is provided outside the sealing cover to provide heat insulation. The sealing cover, the first shell, the second shell, the third shell, and the vent pipe are all made of stainless steel.

[0016] This invention improves the stability and safety of the catalytic combustion furnace by installing a temperature control switch inside the furnace. The switch's efficient and reliable physical signal controls the activation of the supplemental cooling system. This, combined with thermocouples in the adsorption box and furnace, creates two temperature control systems that ensure the overall safety of the equipment and improve energy efficiency. The desorption fan and fresh air fan are separately installed and controlled, allowing for rapid cooling when the temperature inside the adsorption box and / or furnace becomes too high, reducing the likelihood of accidents. Multiple adsorption boxes operate and are independently controlled, alternating between adsorption and desorption, ensuring continuous organic waste gas treatment. The insulation layer and fire-fighting pipes within the adsorption boxes enhance heat source utilization while ensuring equipment safety. The catalytic combustion furnace's structural design extends the flow path of the desorbed organic waste gas within the furnace, prolonging its residence time and promoting thorough catalytic combustion. This improves waste gas treatment efficiency and effectiveness while fully utilizing the heat source and increasing energy efficiency. Attached Figure Description

[0017] Figure 1 This is a flowchart illustrating an embodiment of the present utility model.

[0018] Figure 2 This is a frame diagram of the temperature control part in an embodiment of this utility model.

[0019] Figure 3 This is a schematic diagram of the front structure of the adsorption box in an embodiment of this utility model.

[0020] Figure 4 This is a top view of the adsorption box in an embodiment of the present invention.

[0021] Figure 5 This is a schematic diagram of the catalytic combustion furnace without its outer shell in an embodiment of this utility model.

[0022] Figure 6 This is a schematic diagram of the internal structure of the catalytic combustion furnace in an embodiment of this utility model.

[0023] Figure 7 This is a front view of the internal structure of the catalytic combustion furnace in an embodiment of this utility model.

[0024] Figure 8 This is an external schematic diagram of the catalytic combustion furnace in an embodiment of this utility model.

[0025] Attached reference numerals: 1-Adsorption box; 2-Catalytic combustion furnace; 3-Desorption fan; 4-Fresh air fan; 5-Internal circulation pipe; 6-Desorption pipe; 7-Second exhaust pipe; 11-First air inlet; 12-Second air inlet; 13-Fresh air pipe; 14-First exhaust port; 15-Second exhaust port; 16-Second valve; 17-Third valve; 18-Ninth valve; 101-Outer shell of the box; 102-Activated carbon adsorption bed; 103-Fire protection pipe; 104-Sprinkler head; 105-Aluminum silicate insulation layer ; 201-Third air inlet; 202-Third exhaust outlet; 203-Air inlet duct; 204-Sixth valve; 205-Fifth valve; 21-Stainless steel shell; 22-Sealing cover; 23-Heat exchange module; 24-Catalytic combustion module; 25-Heating module; 26-Gap; 231-First shell; 232-Vent pipe; 233-Horizontal partition; 241-Second shell; 242-Catalytic layer; 251-Third shell; 252-Heating element; 31-Seventh valve; 41-Eighth valve. Detailed Implementation

[0026] Suitable for heat source utilization and make-up cooling safety systems in adsorption-desorption catalytic combustion processes, such as Figure 1 As shown, the system includes an adsorption box 1, a catalytic combustion furnace 2, a desorption fan 3, a fresh air fan 4, a temperature control switch, and a controller. The adsorption box 1 is equipped with a first air inlet 11, a second air inlet 12, a fresh air inlet, a first exhaust port 14, and a second exhaust port 15. The first air inlet 11 is connected to an organic waste gas pipeline (not shown in the figure), which is used to introduce organic waste gas to be treated. The fresh air inlet is connected to a fresh air pipeline 13, which is used to introduce cold air. The second air inlet 12 is connected to an internal circulation pipeline 5. The first exhaust port 14 is connected to a first exhaust pipeline (not shown in the figure), which is used to discharge gas that meets the emission standards after adsorption treatment. When the adsorption box 1 is adsorbing normally, the organic waste gas enters through the first air inlet 11 and the adsorbed gas is discharged through the first exhaust port 14. When the activated carbon in the adsorption box 1 is saturated, the first air inlet 11 and the first exhaust port 14 are closed, and the second air inlet 12 and the second exhaust port 15 are opened. The hot air in the internal circulation pipe 5 enters through the second air inlet 12 for desorption, and the desorbed organic waste gas enters the desorption pipe 6 through the second exhaust port 15.

[0027] The catalytic combustion furnace 2 is provided with a third air inlet 201 and a third exhaust outlet 202. The second exhaust outlet 15 on the adsorption box 1 is connected to the third air inlet 201 on the catalytic combustion furnace 2 through a desorption pipe 6. The third air inlet 201 is also connected to an air inlet pipe 203, which is used to introduce air. When desorption begins, the air enters the catalytic combustion furnace 2 and is heated into hot air, and then enters the adsorption box 1 for desorption. Subsequently, the air inlet pipe 203 can be closed, and the desorbed organic waste gas is catalytically combusted to obtain hot air. A certain amount of fresh air can also be added in real time during the catalytic combustion process to supplement oxygen. The third exhaust port 202 is connected to the second exhaust pipe 7, which is connected to the desorption fan 3. The outlet of the desorption fan 3 is connected to the second air inlet 12 on the adsorption box 1 through the internal circulation pipe 5. It is used to introduce hot air into the adsorption box 1 for desorption and to provide power for the desorbed gas in the adsorption box 1 to enter the catalytic combustion furnace 2. The fresh air fan 4 is connected to a branch of the second exhaust pipe 7. When the temperature in the catalytic combustion furnace 2 is too high, it provides power for cold air to enter the adsorption box 1 and then the catalytic combustion furnace 2, and discharges the high-temperature gas in the catalytic combustion furnace 2. The high-temperature gas can recover heat energy and is discharged after sufficient heat exchange. This setting can achieve rapid cooling of the adsorption box 1 and the catalytic combustion furnace 2.

[0028] like Figure 2 The temperature control switch is installed inside the catalytic combustion furnace 2. The temperature sensing element of the switch is a bimetallic strip. The switch generates a trigger signal by the deformation of the bimetallic strip at a set temperature. The controller is connected to the temperature control switch and receives the trigger signal to control the shutdown of the heating module 25, the start-up of the fresh air fan 4, and the shutdown of the desorption fan 3. The temperature control switch uses a bimetallic strip as its temperature sensing element. Based on changes in the ambient temperature, it is an automatic control element that generates a conduction or disconnection action through internal physical deformation. Specifically, during normal operation, the bimetallic strip is in a free state, and the contacts are in a closed / open state. When the temperature reaches the set operating temperature, the bimetallic strip is heated and generates internal stress, causing it to quickly actuate, opening / closing the contacts and cutting off / connecting the circuit, thereby controlling the temperature. When the temperature cools below the set temperature, the contacts automatically close / open, returning to normal operation. Compared to thermocouples, which transmit temperature signals using electrical signals (electromotive force), the temperature control switch uses physical signals (physical deformation) to represent temperature signals, making it more efficient and reliable. The temperature control switch is applied to the catalytic combustion furnace 2 of the present invention. It is linked with the controller, the fresh air fan 4 and the desorption fan 3. If the furnace temperature exceeds the set value, the physical signal of the deformation of the physical temperature switch can trigger the heating system to shut down and the cooling system to start. That is, the heating module 25 is shut down, the desorption fan 3 is shut down and the fresh air fan 4 is started, thereby reducing the temperature of the catalytic furnace.

[0029] In this embodiment, as Figure 2 The adsorption box 1 is equipped with a first thermocouple, and the catalytic combustion furnace 2 is equipped with a second thermocouple. The first and second thermocouples are respectively connected to the controller. The controller controls the start and stop of the heating module 25, the fresh air fan 4, and the desorption fan 3 within the catalytic combustion furnace 2 based on the electrical signals converted from temperature signals transmitted by the first and second thermocouples. The first and second thermocouples work in conjunction with the temperature control switch, using two temperature control systems to monitor the equipment's operation. If either temperature control system detects a high temperature exceeding the set value, the cooling system will be activated. This prevents equipment instability due to lack of maintenance and calibration, improving the stability and safety of the equipment operation.

[0030] A first valve (not shown in the figure) is installed on the organic waste gas pipeline, a second valve 16 is installed on the fresh air pipeline 13, a third valve 17 is installed on the internal circulation pipeline 5, a fourth valve (not shown in the figure) is installed on the first exhaust pipeline, a fifth valve 205 is installed on the desorption pipeline 6, a sixth valve 204 is installed on the air inlet pipeline 203, a seventh valve 31 is installed between the second exhaust pipeline 7 and the desorption fan 3, and an eighth valve 41 is installed on the branch connecting the fresh air fan 4. The controller is connected to the first valve, the second valve 16, the third valve 17, the fourth valve, the fifth valve 205, the sixth valve 204, the seventh valve 31 and the eighth valve 41 respectively. It is used to control the first valve, the third valve 17, the fourth valve, the sixth valve 204 and the seventh valve 31 to be closed and the second valve 16, the fifth valve 205 and the eighth valve 41 to be open when the temperature inside the catalytic combustion furnace 2 exceeds the set value.

[0031] In this embodiment, three adsorption boxes 1 are arranged side by side. The internal circulation pipe 5 is connected to the second air inlet 12 of each of the three adsorption boxes 1, and the second air inlet 12 of each adsorption box 1 is connected to the internal circulation pipe 5 through a third valve 17. The desorption pipe 6 is connected to the second exhaust port 15 of each of the three adsorption boxes 1, and the second exhaust port 15 of each adsorption box 1 is connected to the desorption pipe 6 through a ninth valve 18, which is also connected to the controller. That is, each adsorption box 1 has a corresponding valve configured for its first air inlet 11, second air inlet 12, fresh air inlet, first exhaust port 14, and second exhaust port 15. Each adsorption box 1 can be operated and controlled independently, so that the three adsorption boxes 1 can alternately perform adsorption and desorption, allowing for continuous and uninterrupted treatment of organic waste gas.

[0032] In this embodiment, as Figure 3 , Figure 4The adsorption box 1 includes a box shell 101, an activated carbon adsorption bed 102 and a fire-fighting pipe 103 disposed in the box shell 101. The fire-fighting pipe 103 is arranged above the activated carbon adsorption bed 102 and is equipped with several nozzles 104. A spray valve (not shown in the figure) is also provided on the fire-fighting pipe 103. The controller is electrically connected to the spray valve and is used to control the opening of the spray valve to spray water when the temperature inside the adsorption box 1 exceeds the warning temperature. The first air inlet 11, the second air inlet 12 and the fresh air inlet are located at the bottom of the box shell 101, and the first exhaust port 14 and the second exhaust port 15 are located at the top of the box shell 101. An aluminum silicate insulation layer 105 is provided inside the box shell 101 to provide thermal insulation.

[0033] In one implementation method, the processing air volume of a single adsorption box 1 is 15000 m³ / h. 3 / h; the material is carbon steel with corrosion resistance, T=2.0mm; the equipment's corrosion-resistant material is heat-resistant to 120℃, the outer shell is made of carbon steel with powder coating, T=2.0mm, the inner plate is made of galvanized sheet, T=1.2mm; the equipment support is made of 100*100mm square steel welded together, T=3.0mm; the inner dimensions of the flanges of the upper and lower inlets and outlets (first air inlet 11 and first exhaust outlet 14) are 600*600mm, and the inner dimensions of the flanges of the desorption inlet and outlet (second exhaust outlet 15) are 200*200mm; each adsorption box has a carbon loading capacity of 1.08m3 and a total height of 0.3m; the main pipe of the fire protection system is DN32mm, the branch pipe is DN25mm, and the material is SUS304, with 10416 sprinklers; the insulation layer is 100mm thick, and the insulation material is aluminum silicate; the drawer size is 1000*900*100mm, with a total of 12 drawers.

[0034] In this embodiment, as Figures 4 to 7The catalytic combustion furnace 2 includes a sealing cover 22 and a heat exchange module 23, a catalytic combustion module 24, and a heating module 25 disposed within the sealing cover 22. The heat exchange module 23, the catalytic combustion module 24, and the heating module 25 are arranged sequentially from top to bottom. The heat exchange module 23 includes a first housing 231 and a plurality of vertically arranged vent pipes 232 disposed within the first housing 231. A gap is preset between the vent pipes 232 to allow gas to pass through. The third air inlet 201 is disposed on the side of the sealing cover 22 near the first housing 231 and is connected to the first housing 231. The third exhaust outlet 202 is disposed on the top of the sealing cover 22 and is connected to the first housing 231. After the organic waste gas enters through the third air inlet 201, it flows between the vent pipes 232 and exchanges heat with the hot air flow in the vent pipes 232, thereby preheating and making full use of the heat source of the hot air flow. The vent pipe 232 can be designed as a DN20 stainless steel round pipe with an outer diameter of 25mm and a length of 465mm, for a total of 800 pipes.

[0035] The catalytic combustion module 24 includes a second housing 241 and several catalytic layers 242 disposed within the second housing 241. The top of the second housing 241 is connected to a vent pipe 232. A temperature control switch and a thermocouple can be disposed within the catalytic combustion module 24. In this embodiment, the catalytic layers 242 are provided in three layers, each including a support frame and a platinum-precious metal supported catalytic honeycomb block disposed on the support frame. The specifications of the platinum-precious metal supported catalytic honeycomb block can be 100×100×50mm, totaling 0.34m. 3 Install two layers every other time.

[0036] The heating module 25 includes a third housing 251 and a plurality of heating tubes 252 disposed within the third housing 251. A pre-set gap is provided between the heating tubes 252 to allow vertical gas passage. The top of the third housing 251 is connected to the bottom of the second housing 241, and an air inlet is provided at the bottom of the third housing 251. In this embodiment, the heating tubes 252 have a power of 3.5 kW, with 18 tubes (divided into 6 groups of 3), for a total power of 75 kW.

[0037] Gaps 26 for gas passage are reserved between the side of the first housing 231, the side of the second housing 241, the side of the third housing 251, the bottom surface of the third housing 251, and the sealing cover 22. These gaps 26 are vertically connected, so that the gas entering through the third air inlet 201 is preheated by the heat exchange module 23, and then passes sequentially through the gaps 26 between the side of the first housing 231 and the sealing cover 22, the side of the second housing 241 and the sealing cover 22, the side of the third housing 251 and the sealing cover 22, and the bottom surface of the third housing 251 and the sealing cover 22. After passing through these gaps, the gas then enters the vent pipes 232 in the heating module 25, the catalytic combustion module 24, and the heat exchange module 23, and is discharged through the third exhaust port 202. In this way, the gas travels from top to bottom and then from bottom to top, which extends the path, improves the combustion catalytic effect, makes full use of the heat source, and saves energy.

[0038] As a further improvement, a horizontal partition 233 is provided inside the first housing 231, which divides the space inside the first housing 231 into upper and lower layers. The vent pipe 232 passes through the horizontal partition 233, and the third air inlet 201 is located near the upper layer of the first housing 231. After the gas is preheated in the upper layer of the first housing 231, it enters the lower layer of the first housing 231 through the gap 26 between the first housing 231 and the sealing cover 22 for further preheating, and then enters the gap 26 between the second housing 241 and the sealing cover 22 through the gap 26 between the first housing 231 and the sealing cover 22. This can further extend the gas path and improve the preheating effect.

[0039] In this embodiment, as Figure 8 The sealing cover 22 is further provided with a stainless steel outer shell 21 to serve as heat insulation. The sealing cover 22, the first shell 231, the second shell 241, the third shell 251 and the vent pipe 232 are all made of stainless steel.

[0040] The above detailed description is a specific description of a feasible embodiment of the present utility model. This embodiment is not intended to limit the patent scope of the present utility model. All equivalent implementations or modifications that do not depart from the present utility model should be included in the patent scope of this case.

Claims

1. A heat source utilization and subcooling safety system suitable for adsorption desorption catalytic combustion processes, characterized in that, The application relates to an organic waste gas treatment device, which comprises an adsorption box, a catalytic combustion furnace, a desorption fan, a fresh air fan, a temperature control switch and a controller, wherein a first air inlet, a second air inlet, a fresh air inlet, a first air outlet and a second air outlet are arranged on the adsorption box; an organic waste gas pipeline is connected with the first air inlet and used for feeding in organic waste gas to be treated; a fresh air pipeline is connected with the fresh air inlet and used for feeding in cold air; an inner circulation pipeline is connected with the second air inlet; a first exhaust pipeline is connected with the first air outlet and used for discharging gas treated by adsorption and meeting the discharge standard; a third air inlet and a third air outlet are arranged on the catalytic combustion furnace; the second air outlet of the adsorption box is connected with the third air inlet of the catalytic combustion furnace through a desorption pipeline; the third air inlet is simultaneously connected with an air inlet pipeline used for feeding in air; the third air outlet is connected with a second exhaust pipeline; the second exhaust pipeline is connected with the desorption fan; the outlet of the desorption fan is connected with the second air inlet of the adsorption box through the inner circulation pipeline, used for feeding in hot air into the adsorption box to perform desorption and make the desorbed gas in the adsorption box enter the catalytic combustion furnace; the fresh air fan is connected with a branch of the second exhaust pipeline, used for feeding in cold air into the catalytic combustion furnace through the adsorption box when the temperature in the catalytic combustion furnace is too high, and discharging high-temperature gas in the catalytic combustion furnace; the temperature control switch is arranged in the catalytic combustion furnace, the temperature sensing element of the temperature control switch is a bimetallic strip, the temperature control switch is used for triggering a signal through the deformation of the bimetallic strip at a set temperature, and the controller is connected with the temperature control switch and used for receiving the triggering signal of the temperature control switch, controlling the closing of a heating module, the opening of the fresh air fan and the closing of the desorption fan.

2. The heat source utilization and subcooling safety system suitable for adsorption- desorption catalytic combustion process according to claim 1, characterized in that, A first thermocouple is arranged in the adsorption box, a second thermocouple is arranged in the catalytic combustion furnace, the first thermocouple and the second thermocouple are connected with the controller respectively, and the controller is used for controlling the start-stop of the heating module, the fresh air fan and the desorption fan in the catalytic combustion furnace according to the temperature signals transmitted by the first thermocouple and the second thermocouple.

3. The heat source utilization and subcooling safety system adapted for a sorption desorption catalytic combustion process according to claim 1, characterized in that, The adsorption box is provided with three parallel adsorption boxes, the inner circulation pipelines are connected with the second air inlets of the three adsorption boxes respectively, and the desorption pipelines are connected with the second air outlets of the three adsorption boxes respectively.

4. The heat source utilization and subcooling safety system adapted for a sorption- desorption catalytic combustion process according to claim 1, characterized in that, First, second, third, fourth, fifth, sixth, seventh and eighth valves are arranged on the organic waste gas pipeline, the fresh air pipeline, the inner circulation pipeline, the first exhaust pipeline, the desorption pipeline and the branch connected with the fresh air fan respectively, and the controller is connected with the first, second, third, fourth, fifth, sixth, seventh and eighth valves respectively, used for controlling the first, third, fourth, sixth and seventh valves to be in a closed state, and the second, fifth and eighth valves to be in an open state when the temperature in the catalytic combustion furnace exceeds a set value.

5. The heat source utilization and subcooling safety system adapted for a sorption- desorption catalytic combustion process according to claim 4, characterized in that The adsorption box is provided with three in parallel, the inner circulation pipeline is connected with the second air inlet of the three adsorption boxes respectively, and the second air inlet of each adsorption box is communicated with the inner circulation pipeline through a third valve.

6. The heat source utilization and subcooling safety system adapted for a sorption desorption catalytic combustion process according to claim 1, characterized in that, The adsorption box includes a box shell, an activated carbon adsorption bed arranged in the box shell, and a fire-fighting pipeline arranged above the activated carbon adsorption bed, wherein a plurality of spray heads are arranged on the fire-fighting pipeline, a spray valve is arranged on the fire-fighting pipeline, and the controller is electrically connected with the spray valve and used for controlling the spray valve to spray water when the temperature in the adsorption box exceeds the warning temperature; the first air inlet, the second air inlet, and the fresh air inlet are arranged at the bottom of the box shell, the first air outlet and the second air outlet are arranged at the top of the box shell, and an aluminum silicate heat preservation layer is arranged in the box shell.

7. The heat source utilization and subcooling safety system adapted for a sorption desorption catalytic combustion process according to claim 1, characterized in that, The catalytic combustion furnace includes a sealing cover and a heat exchange module, a catalytic combustion module, and a heating module arranged in the sealing cover, wherein the heat exchange module, the catalytic combustion module, and the heating module are arranged in sequence from top to bottom, the heat exchange module includes a first shell and a plurality of vertical air pipes arranged in the first shell, and gaps allowing gas to pass through are arranged between the air pipes, the third air inlet is arranged on the sealing cover at a position close to the side of the first shell and is in communication with the first shell, the third air outlet is arranged at the top of the sealing cover and is in communication with the first shell, the catalytic combustion module includes a second shell and a plurality of catalytic layers arranged in the second shell, and the top of the second shell is in communication with the air pipes, the heating module includes a third shell and a plurality of electric heating pipes arranged in the third shell, gaps allowing gas to pass vertically are arranged between the electric heating pipes, the top of the third shell is in communication with the bottom of the second shell, and the bottom of the third shell is provided with an air inlet, and gaps allowing gas to pass through are reserved between the side of the first shell, the side of the second shell, the side of the third shell, the bottom of the third shell, and the sealing cover, and the gaps are in communication with each other, so that the gas entering through the third air inlet is preheated by the heat exchange module, sequentially passes through the gaps between the side of the first shell and the sealing cover, the gaps between the side of the second shell and the sealing cover, the gaps between the side of the third shell and the sealing cover, and the gaps between the bottom of the third shell and the sealing cover, and then sequentially enters the heating module, the catalytic combustion module, and the air pipes in the heat exchange module and is discharged through the third air outlet.

8. The heat source utilization and subcooling safety system adapted for a sorption desorption catalytic combustion process according to claim 7, characterized in that, The first shell is internally provided with a horizontal partition plate, which divides the space in the first shell into two layers, the vent pipe penetrates through the horizontal partition plate, the third air inlet is arranged at a position close to the upper layer of the first shell, and the gas is preheated in the upper layer of the first shell, then enters the lower layer of the first shell through the gap between the first shell and the sealing cover for further preheating, and then enters the gap between the second shell and the sealing cover through the gap between the first shell and the sealing cover.

9. The heat source utilization and subcooling safety system adapted for a sorption desorption catalytic combustion process according to claim 7, characterized in that, The catalytic layer is provided with three layers, and each layer of the catalytic layer comprises a supporting frame and a platinum noble metal supported catalytic honeycomb block arranged on the supporting frame.

10. The heat source utilization and subcooling safety system adapted for a sorption desorption catalytic combustion process according to claim 7, characterized in that, The sealing cover is further provided with a stainless steel shell outside, which plays a heat preservation and heat insulation role, and the sealing cover, the first shell, the second shell, the third shell and the vent pipe are all made of stainless steel.

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