Organic waste gas recovery treatment system and method

Abstract

The invention relates to the technical field of waste gas treatment, and particularly discloses an organic waste gas recovery treatment system and method.The organic waste gas recovery treatment system comprises a buffer tank, a condensation system, a PSA adsorption system and a treatment system, the condensation system comprises an induced draft fan and a condensing unit, and a first inlet of the buffer tank is connected with a sample introduction pipeline; a first outlet of the buffer tank is connected with a first inlet pipeline of the condensing unit, an induced draft fan is arranged in a pipeline for connecting the buffer tank and the condensing unit, and a pressure transmitter is arranged on an inlet pipeline of the induced draft fan; the PSA adsorption system comprises a first activated carbon canister, a second activated carbon canister and a vacuum pump, and the treatment system comprises a gas mixer, a fan, a heat accumulating type oxidation furnace, a mixer and a bypass valve. According to the invention, the organic waste gas can be efficiently treated, the organic waste gas can be recycled to the greatest extent, the resource waste is reduced, the adsorbent replacement frequency, the plugging risk and the operation load of subsequent equipment are reduced, the cost is saved, and the economic efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of waste gas recovery and treatment, and in particular to an organic waste gas recovery and treatment system and method. Background Art

[0002] The traditional method of recycling and treating organic waste gas is to directly treat it through absorption degassing, thermal storage oxidation treatment and other methods. The adsorption method can only treat organic waste gas with low concentration, and the adsorbent is easy to reach saturation state, and the absorbent needs to be replaced frequently, which increases production costs. If the adsorbent is not replaced in time, blockage will occur, resulting in unsatisfactory adsorption effect, which will increase the operating load of other equipment, causing waste of resources and safety problems. Although the thermal storage oxidation treatment method can treat high-concentration organic waste gas, some of the medium and high boiling point organic gases cannot be recycled, resulting in waste of resources. Summary of the invention

[0003] In order to solve the above-mentioned problems existing in the prior art, the present invention provides an organic waste gas recovery and treatment system and method, which can achieve efficient treatment of organic waste gas, can recycle and treat organic waste gas to the greatest extent, reduce resource waste, reduce the frequency of adsorbent replacement and the risk of clogging and the operating load of subsequent equipment, save costs and improve economic efficiency.

[0004] The purpose of the present invention can be achieved through the following technical solutions: An organic waste gas recovery and treatment system comprises a buffer tank, a condensation system, a PSA adsorption system and a treatment system, wherein the condensation system comprises an induced draft fan and a condensation unit, wherein a first inlet of the buffer tank is connected to a sampling pipeline, a first outlet of the buffer tank is connected to a first inlet pipeline of the condensation unit, the induced draft fan is arranged in a pipeline connecting the buffer tank and the condensation unit, and a pressure transmitter is arranged on the inlet pipeline of the induced draft fan; The PSA adsorption system includes a first activated carbon canister, a second activated carbon canister and a vacuum pump, the treatment system includes a gas mixer, a fan, a regenerative thermal oxidizer, a mixer and a bypass valve, the outlet of the condensing unit is connected to the lower inlet of the first activated carbon canister and the lower inlet pipeline of the second activated carbon canister, the top outlet of the first activated carbon canister and the top outlet of the second activated carbon canister are connected to the gas mixer pipeline, the upper inlet pipeline of the regenerative thermal oxidizer is connected to a burner, the regenerative thermal oxidizer is provided with an oxidation chamber, multiple groups of regenerative chambers and multiple groups of lower chambers, and the multiple groups of regenerative chambers Ceramic fillers are arranged inside, the gas mixer is connected to the lower inlets of the multiple groups of lower chambers of the regenerative thermal oxidation furnace through pipelines, a fan is arranged in the pipeline connecting the gas mixer and the lower inlets of the multiple groups of lower chambers of the regenerative thermal oxidation furnace, the upper outlet of the regenerative thermal oxidation furnace is connected to the upper inlet pipeline of the mixer, the bypass valve is arranged in the pipeline connecting the upper outlet of the regenerative thermal oxidation furnace and the upper inlet of the mixer, the lower outlet of the regenerative thermal oxidation furnace is connected to the lower inlet pipeline of the mixer, and the outlet of the mixer is connected to the gas exhaust pipe.

[0005] Preferably, the condensing unit includes a primary evaporator, a secondary evaporator, a tertiary evaporator, an oil storage tank, a subcooling exchanger and a precooler, the outlet of the oil storage tank is connected to the second inlet pipeline of the buffer tank, and the second inlet of the condensing unit is connected to the second air supply pipeline.

[0006] Preferably, the first activated carbon tank and the second activated carbon tank are arranged in parallel, the top inlet of the first activated carbon tank and the top inlet of the second activated carbon tank are connected to the first air supply pipe, a cooling water pipe is provided on one side of the first activated carbon tank, and a cooling water pipe is provided on one side of the second activated carbon tank. The lower outlet of the first activated carbon tank and the lower outlet of the second activated carbon tank are connected to the third inlet pipeline of the buffer tank, and the vacuum pump is provided in the pipeline connecting the lower outlet of the first activated carbon tank and the lower outlet of the second activated carbon tank to the third inlet of the buffer tank.

[0007] Preferably, a filter assembly and a cleaning assembly are provided in the sampling pipeline, the filter assembly includes a first limit frame and a filter screen, the first limit frame is fixedly connected to the inner wall of the sampling pipeline, the filter screen is slidably connected to the first limit frame, the top of the filter screen is fixedly connected with an upper cover, the cleaning assembly includes a hydraulic cylinder, an auxiliary frame and a cleaning brush, the hydraulic cylinder is fixedly connected to the cleaning brush, the auxiliary frame is fixedly connected to the cleaning brush, the position of the cleaning brush corresponds to the position of the filter screen, a limit block is provided above the sampling pipeline, a through hole is opened on the limit block, and the auxiliary frame passes through the through hole of the limit block and is slidably connected to the limit block.

[0008] Preferably, a recovery component is provided below the filter screen, and the recovery component is detachably connected to the bottom of the sampling pipeline. The recovery component includes a recovery box, a connecting block and an isolation plate. The connecting block is arranged in a T shape, and the connecting block is fixedly connected to the sampling pipeline. The isolation plate is rotatably connected to the connecting block through a second fixed block and a pin. The isolation plate is arranged in a Z shape, and the isolation plate matches the connecting block.

[0009] Preferably, a cleaning rack and two groups of symmetrically arranged transmission components are provided inside the recycling box, and the transmission component includes a guide rail, a support block, a first spring and a first fixed block. The cleaning rack is fixedly connected to one side of the recycling box, and the position of the cleaning rack corresponds to the position of the cleaning brush. The guide rail is fixedly connected to the recycling box, and the guide rail is arranged in an arc shape, and an arc-shaped groove is opened along the outer wall shape of the guide rail.

[0010] Preferably, the first fixed block is fixedly connected to one side of the guide rail groove, the first spring is arranged at the groove of the guide rail, the first spring matches the groove of the guide rail, one side of the first spring is fixedly connected to the first fixed block, the other side of the first spring is fixedly connected to the support block, a protruding section matching the support block is arranged at the groove of the guide rail, the support block is slidably connected to the guide rail through the protruding section, and a through hole matching the guide rail is opened on the isolation plate.

[0011] Preferably, a spiral pipe and an inner cylinder are provided inside the buffer tank, a buffer assembly is provided inside the inner cylinder, the buffer assembly includes a buffer plate, a second spring, a support rod, a sleeve, a transition plate, a base and a limit frame, the limit frame is arranged in a ring shape, the limit frame is fixedly connected to the inner wall of the inner cylinder, the buffer plate is arranged on the inner side of the limit frame, the buffer plate is slidably connected to the limit frame, and a sealing layer is provided between the buffer plate and the limit frame.

[0012] Preferably, a circle of protruding limiting sections is provided at the bottom of the limit frame, a plurality of through holes is provided on the buffer plate, a plurality of support rods are provided, and the plurality of support rods are fixedly connected to the lower part of the buffer plate, the lower part of the support rod is fixedly connected to the sleeve, the part where the sleeve is connected to the support rod is provided with a damping layer, the second spring is sleeved on the support rod, the transition plate is fixedly connected to the lower part of the sleeve, and the base is fixedly connected to the lower part of the transition plate.

[0013] A method for recovering and treating organic waste gas comprises the following steps: Treatment of organic waste gas: S1: pass the organic waste gas into the sampling pipeline, filter the organic waste gas, intercept the particulate matter in the organic waste gas, and pass the filtered organic waste gas into the buffer tank for buffering to balance the pressure fluctuation of the organic waste gas; S2: The buffered organic waste gas is passed through the induced draft fan into the condensing unit for condensation treatment. The organic waste gas is precooled by the precooler, and then passed into the first-stage evaporator to cool the organic waste gas to 0-5°C, remove most of the water vapor and high-boiling point organic waste gas components, and obtain condensate A. The organic waste gas that is not condensed in the first stage is passed into the second-stage evaporator and cooled to -20--30°C, and the residual water vapor and medium-boiling point organic waste gas components are precipitated to obtain condensate B; the organic waste gas components that are not condensed in the second-stage evaporator are passed into the third-stage evaporator and cooled to -55--70°C, and the medium and low boiling point components are further precipitated to obtain condensate C. The organic waste gas after multi-stage condensation treatment is passed into the subcooling exchanger and the precooler for heat exchange, so that the temperature of the organic waste gas rises to 0-25°C, and low-concentration organic waste gas is obtained; S3: Condensate A, condensate B and condensate C are passed into the oil storage tank for recovery, and low-concentration organic waste gas is passed into the first activated carbon tank for adsorption treatment. When the first activated carbon tank is saturated with adsorption, the system automatically switches to the second activated carbon tank for adsorption treatment of the low-concentration organic waste gas, and at the same time, the first activated carbon tank is desorbed to obtain organic waste gas A after adsorption treatment; S4: The organic waste gas A and air are introduced into the regenerative oxidation furnace through a gas mixer and a fan for oxidation and decomposition treatment. The organic waste gas A is preheated in a group of regenerative chambers, and then enters the oxidation chamber for heating to 760°C to 850°C. The organic components in the organic waste gas A are oxidized and decomposed to obtain high-temperature tail gas; S5: passing the high-temperature tail gas into another group of heat storage chambers, exchanging heat with the ceramic fillers in the heat storage chambers to reduce the temperature, and obtaining tail gas. When the indoor temperature of the oxidation chamber of the regenerative thermal oxidation furnace is within the set temperature range, the bypass valve is closed, and the tail gas is passed through the heat storage chamber for heat exchange and then directly discharged through the gas discharge pipe. When the indoor temperature of the oxidation chamber of the regenerative thermal oxidation furnace is higher than the set temperature range, the bypass valve is opened, and the tail gas is passed through the bypass valve into the mixer for mixing and cooling, and then discharged through the gas discharge pipe. Reuse of activated carbon canisters: S6: After the first activated carbon tank is saturated with adsorption, nitrogen is introduced into the first activated carbon tank through the first air supply pipe, and the vacuum pump is turned on at the same time. The vacuum pump is used to perform vacuum desorption on the first activated carbon tank to reduce the pressure of the activated carbon bed, so that the organic waste gas components adsorbed in the activated carbon are separated from the pore structure of the activated carbon and transported from the first activated carbon tank back to the buffer tank for subsequent processing and recovery. At this time, the first activated carbon tank can continue to be used.

[0014] The beneficial effects of the present invention are: (1) By setting up a condensation system, the technical effect that can be achieved is that the components with strong volatility in the organic waste gas are preferentially recovered and processed through the condensing unit before oxidation treatment. By setting up three-stage continuous cooling to gradually reduce the oil and gas temperature, the different components in the organic waste gas can be condensed into liquid in stages to the greatest extent, thereby improving the recovery efficiency, reducing resource waste, saving costs, and improving economic benefits.

[0015] (2) By setting up a condensation system, a PSA adsorption system and a treatment system, the technical effect that can be achieved is to set up two pipelines connecting the thermal storage oxidizer and the mixer, so as to facilitate the switching of the exhaust gas emission pipeline in coordination with the indoor temperature of the thermal storage oxidizer, avoid the high-temperature exhaust gas from being directly discharged into the air, and recover part of the components of the organic waste gas through the condensing unit, so that the concentration of the organic waste gas is reduced during the subsequent adsorption treatment, and nitrogen is introduced into the activated carbon tank through the first air supply pipe and the vacuum pump is used to vacuum desorb the activated carbon in the activated carbon tank, so that the activated carbon tank can be reused, reducing the frequency of replacement of the activated carbon adsorbent and the risk of clogging, as well as the operating load of the subsequent equipment, and further improving the waste gas treatment efficiency. The two activated carbon tanks are connected in parallel for easy switching, which can ensure that the system as a whole will not stop the waste gas treatment work due to the saturation of the activated carbon adsorption when the waste gas recovery treatment is carried out, thereby ensuring the treatment efficiency. The condensing unit, the first activated carbon tank, the second activated carbon tank and the thermal storage oxidizer are used together to recover the beneficial components in the organic waste gas with the maximum efficiency and improve the treatment efficiency.

[0016] (3) By setting up the filter assembly and the cleaning assembly, the technical effect that can be achieved is that the first limit frame is fixedly connected to the inner wall of the sampling pipe, which is convenient for limiting and fixing the filter screen; the auxiliary frame is fixedly connected to the cleaning brush, which improves the stability of the cleaning brush when it moves up and down; by setting up the filter screen, the particulate matter in the organic waste gas can be pre-filtered to improve the subsequent processing efficiency; by setting up the cleaning brush, it is convenient to clean the filter screen, which can reduce the frequency of filter screen replacement and reduce the processing cost.

[0017] (4) By setting up a recovery component, the technical effect that can be achieved is that the recovery component can be detachably connected to the bottom of the sampling pipeline, which is convenient for cleaning and maintenance. The position of the cleaning rack corresponds to the position of the cleaning brush, which is convenient for cleaning the cleaning brush while the cleaning brush sweeps the impurities on the filter into the recovery box, thereby avoiding the accumulation of impurities on the cleaning brush, which leads to a decrease in the efficiency of the cleaning brush when cleaning the filter. The support block supports the isolation plate when the isolation plate is in a horizontal state. When the cleaning brush moves downward to push the isolation plate, the isolation plate drives the support block and the first spring to move along the guide rail, so that the recovery box is in an open state, which is convenient for the cleaning brush to sweep the impurities into the recovery box. When the cleaning brush moves upward to the outside of the recovery box, the first spring drives the support block to move along the guide rail to reset, so that the recovery box is in a closed state, thereby avoiding the impurities in the recovery box being brought up when the organic waste gas passes into the sampling pipeline, thereby affecting the normal filtration of the organic waste gas.

[0018] (5) By setting up a buffer component, the technical effect that can be achieved is that a sealing layer is set between the buffer plate and the limit frame to ensure air tightness. When the organic waste gas is introduced, the buffer plate, the second spring, the support rod and the sleeve cooperate with each other to move in the vertical direction along the limit frame, providing a buffer force, balancing the pressure fluctuation of the organic waste gas, and reducing the impact force on the subsequent waste gas treatment equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the processing flow of the device of the present invention; Figure 2 It is a stereoscopic diagram of the buffer tank and the sampling pipeline in the present invention; Figure 3 is a cross-sectional view of the sample injection pipeline and the recovery component in the present invention; Figure 4 It is a structural diagram of the filtering component, the cleaning component and the recycling component in the present invention; Figure 5 It is a structural diagram of a part of the recycling components in the present invention; Figure 6 It is a structural diagram of the interior of the recycling box in the present invention; Figure 7 is a first cross-sectional view of the buffer tank in the present invention; Figure 8 is a second cross-sectional view of the buffer tank in the present invention; Fig. 9 It is a front view of the buffer assembly in the present invention; Fig.10 is a structural diagram of the buffer assembly in the present invention; Fig.11It is a schematic diagram of the buffer assembly in the present invention when in motion; Description of main component symbols: In the figure: 1. buffer tank; 101. spiral pipe; 102. buffer assembly; 1021. buffer plate; 1022. second spring; 1023. support rod; 1024. sleeve; 1025. transition plate; 1026. base; 1027. limit frame; 2. induced draft fan; 3. condensing unit; 401. first activated carbon tank; 402. second activated carbon tank; 5. vacuum pump; 6. gas mixer; 7. fan; 8. storage tank Thermal oxidation furnace; 9. mixer; 10. bypass valve; 11. hydraulic cylinder; 12. auxiliary frame; 13. limit block; 14. upper cover; 15. recovery box; 1501. cleaning frame; 1502. guide rail; 1503. support block; 1504. first spring; 1505. first fixed block; 16. connecting block; 17. isolation plate; 1701. second fixed block; 18. cleaning brush; 19. first limit frame; 20. filter screen. DETAILED DESCRIPTION

[0021] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are clearly and completely described below in combination with the accompanying drawings and preferred embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present application, it should be understood that the orientation or position relationship indicated by "inside" or "outside" is based on the orientation or position described in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, specific orientation structure and operation, and therefore cannot be understood as a limitation on the present application.

[0023] Reference Figures 1 to 10 The present invention discloses an organic waste gas recovery and treatment system, comprising a buffer tank 1, a condensation system, a PSA adsorption system and a treatment system, wherein the condensation system comprises an induced draft fan 2 and a condensation unit 3, wherein a first inlet of the buffer tank 1 is connected to a sampling pipeline, a first outlet of the buffer tank 1 is connected to a first inlet pipeline of the condensation unit 3, an induced draft fan 2 is arranged in a pipeline connecting the buffer tank 1 and the condensation unit 3, and a pressure transmitter is arranged on the inlet pipeline of the induced draft fan 2; The PSA adsorption system includes a first activated carbon tank 401, a second activated carbon tank 402 and a vacuum pump 5, and the treatment system includes a gas mixer 6, a fan 7, a regenerative thermal oxidation furnace 8, a mixer 9 and a bypass valve 10. The outlet of the condensing unit is connected to the lower inlet of the first activated carbon tank 401 and the lower inlet pipeline of the second activated carbon tank 402, and the top outlet of the first activated carbon tank 401 and the top outlet of the second activated carbon tank 402 are connected to the gas mixer 6 pipeline. The gas mixer 6 is used to mix the organic waste gas with air to increase the oxygen content in the organic waste gas for subsequent treatment. The upper inlet pipeline of the regenerative thermal oxidation furnace 8 is connected to a burner. The regenerative thermal oxidation furnace 8 is provided with an oxidation chamber, a plurality of regenerative thermal chambers and a plurality of lower chambers. Ceramic fillers are provided in the plurality of regenerative thermal chambers. The body mixer 6 is connected to the lower inlets of multiple groups of lower chambers of the regenerative thermal oxidizer 8 by pipelines, a fan 7 is arranged in the pipeline connecting the gas mixer 6 and the lower inlets of multiple groups of lower chambers of the regenerative thermal oxidizer 8, the upper outlet of the regenerative thermal oxidizer 8 is connected to the upper inlet pipeline of the mixer 9, a bypass valve 10 is arranged in the pipeline connecting the upper outlet of the regenerative thermal oxidizer 8 and the upper inlet of the mixer 9, the lower outlet of the regenerative thermal oxidizer 8 is connected to the lower inlet pipeline of the mixer 9, the outlet of the mixer 9 is connected to the gas exhaust pipe, and a coolant is arranged on the upper part of the mixer 9. By arranging two pipelines connecting the regenerative thermal oxidizer 8 and the mixer 9, it is convenient to switch the exhaust gas exhaust pipeline in accordance with the indoor temperature of the regenerative thermal oxidizer 8 to avoid direct discharge of high-temperature exhaust gas into the air.

[0024] Reference Figure 1 The condensing unit 3 includes a primary evaporator, a secondary evaporator, a tertiary evaporator, an oil storage tank, a subcooling exchanger and a precooler. The outlet of the oil storage tank is connected to the second inlet pipeline of the buffer tank 1, and the second inlet of the condensing unit 3 is connected to the second air supply pipeline.

[0025] Reference Figure 1 The first activated carbon tank 401 and the second activated carbon tank 402 are arranged in parallel, the top inlet of the first activated carbon tank 401 and the top inlet of the second activated carbon tank 402 are connected to the first air supply pipe, a cooling water pipe is arranged on one side of the first activated carbon tank 401, and a cooling water pipe is arranged on one side of the second activated carbon tank 402. The lower outlet of the first activated carbon tank 401 and the lower outlet of the second activated carbon tank 402 are connected to the third inlet pipeline of the buffer tank 1, and a vacuum pump 5 is arranged in the pipeline connecting the lower outlet of the first activated carbon tank 401 and the lower outlet of the second activated carbon tank 402 and the third inlet of the buffer tank 1.

[0026] By setting up the condensing unit 3, the components with strong volatility in the organic waste gas are preferentially recovered and processed through the condensing unit 3 before oxidation treatment. By setting up three-stage continuous cooling to gradually reduce the oil and gas temperature, the different components in the organic waste gas can be graded and condensed into liquid to the greatest extent, thereby improving the recovery efficiency, reducing resource waste, saving costs, and improving economic benefits.

[0027] By recovering some components of the organic waste gas, the concentration of the organic waste gas is reduced during the subsequent adsorption treatment, and nitrogen is introduced into the activated carbon canister through the first air supply pipe in cooperation with the vacuum pump 5 to perform vacuum desorption on the activated carbon in the activated carbon canister, so that the activated carbon canister can be reused, reducing the frequency of replacement of the activated carbon adsorbent and the risk of clogging, as well as the operating load of subsequent equipment, and further improving the waste gas treatment efficiency. The two activated carbon canisters are connected in parallel for easy switching, which can ensure that the system as a whole will not stop the waste gas treatment work due to the saturation of the activated carbon adsorption during the waste gas recovery treatment work, thereby ensuring the treatment efficiency.

[0028] By setting up a condensation system and a treatment system, the condensation unit 3, the first activated carbon tank 401, the second activated carbon tank 402 and the regenerative thermal oxidation furnace 8 are used together, so that the beneficial components in the organic waste gas can be recovered with maximum efficiency and the treatment efficiency can be improved.

[0029] Reference Figures 2 to 6 A filter assembly and a cleaning assembly are provided in the sample inlet pipeline. The filter assembly includes a first limiting frame 19 and a filter screen 20. The first limiting frame 19 is fixedly connected to the inner wall of the sample inlet pipeline to facilitate limiting and fixing the filter screen 20. The filter screen 20 is slidably connected to the first limiting frame 19. The top of the filter screen 20 is fixedly connected to an upper cover 14. The cleaning assembly includes a hydraulic cylinder 11, an auxiliary frame 12 and a cleaning brush 18. The hydraulic cylinder 11 is fixedly connected to the cleaning brush 18, and the auxiliary frame 12 is fixedly connected to the cleaning brush 18 to improve cleaning efficiency. The brush 18 is stable when moving up and down, and the position of the cleaning brush 18 corresponds to the position of the filter 20. A limit block 13 is arranged above the sampling pipe, and a through hole is opened on the limit block 13. The auxiliary frame 12 passes through the through hole of the limit block 13 and is slidably connected to the limit block 13. By setting the filter 20, particulate matter in the organic waste gas can be filtered in advance to improve the subsequent processing efficiency. By setting the cleaning brush 18, it is easy to clean the filter 20, which can reduce the frequency of replacing the filter 20 and reduce the processing cost.

[0030] Reference Figures 2 to 6A recovery component is provided below the filter 20, and the recovery component is detachably connected to the bottom of the sampling pipeline for easy cleaning and maintenance. The recovery component includes a recovery box 15, a connecting block 16 and an isolation plate 17. The connecting block 16 is arranged in a T shape, and the connecting block 16 is fixedly connected to the sampling pipeline. The isolation plate 17 is rotatably connected to the connecting block 16 through the second fixed block 1701 and the pin. The isolation plate 17 is arranged in a Z shape, and the isolation plate 17 matches the connecting block 16.

[0031] Reference Figure 3 , Figure 5 and Figure 6 A cleaning frame 1501 and two sets of symmetrically arranged transmission components are arranged inside the recycling box 15, and the transmission components include a guide rail 1502, a support block 1503, a first spring 1504 and a first fixed block 1505. The cleaning frame 1501 is fixedly connected to one side of the recycling box 15, and the position of the cleaning frame 1501 corresponds to the position of the cleaning brush 18, so that the cleaning brush 18 can be cleaned while sweeping the impurities on the filter 20 into the recycling box 15, so as to avoid the accumulation of impurities on the cleaning brush 18, resulting in reduced efficiency of the cleaning brush 18 when cleaning the filter 20. The guide rail 1502 is fixedly connected to the recycling box 15, and the guide rail 1502 is arranged in an arc shape, and an arc-shaped groove is opened along the outer wall shape of the guide rail 1502.

[0032] Reference Figures 3 to 6 The first fixed block 1505 is fixedly connected to one side of the groove of the guide rail 1502, the first spring 1504 is arranged at the groove of the guide rail 1502, the first spring 1504 matches the groove of the guide rail 1502, one side of the first spring 1504 is fixedly connected to the first fixed block 1505, and the other side of the first spring 1504 is fixedly connected to the support block 1503, a protruding section matching the support block 1503 is arranged at the groove of the guide rail 1502, the support block 1503 is slidably connected to the guide rail 1502 through the protruding section, and a through hole matching the guide rail 1502 is opened on the isolation plate 17.

[0033] The support block 1503 supports the isolation plate 17 when the isolation plate 17 is in a horizontal state. When the cleaning brush 18 moves downward to push the isolation plate 17, the isolation plate 17 drives the support block 1503 and the first spring 1504 to move along the guide rail 1502, so that the recycling box 15 is in an open state, which is convenient for the cleaning brush 18 to sweep impurities into the recycling box 15. When the cleaning brush 18 moves upward to the outside of the recycling box 15, the first spring 1504 drives the support block 1503 to move along the guide rail 1502 to reset, so that the recycling box 15 is in a closed state, thereby preventing the organic waste gas from being brought up with impurities in the recycling box 15 when it passes into the sampling pipeline, thereby affecting the normal filtration of the organic waste gas.

[0034] Reference Figures 7 to 11A spiral pipe 101 and an inner tube are arranged inside the buffer tank 1, and a buffer assembly 102 is arranged inside the inner tube. The buffer assembly 102 includes a buffer plate 1021, a second spring 1022, a support rod 1023, a sleeve 1024, a transition plate 1025, a base 1026 and a limit frame 1027. The limit frame 1027 is arranged in a ring shape, and the limit frame 1027 is fixedly connected to the inner wall of the inner tube. The buffer plate 1021 is arranged on the inner side of the limit frame 1027, and the buffer plate 1021 is slidably connected to the limit frame 1027. A sealing layer is arranged between the buffer plate 1021 and the limit frame 1027 to ensure air tightness.

[0035] Reference Figures 7 to 11 A circle of protruding limiting sections is provided at the bottom of the limiting frame 1027, a plurality of through holes are provided on the buffer plate 1021, a plurality of support rods 1023 are provided, and the plurality of support rods 1023 are fixedly connected to the lower part of the buffer plate 1021, a sleeve 1024 is fixedly connected to the lower part of the support rod 1023, a damping layer is provided at the part where the sleeve 1024 and the support rod 1023 are connected, a second spring 1022 is sleeved on the support rod 1023, a transition plate 1025 is fixedly connected to the lower part of the sleeve 1024, and a base 1026 is fixedly connected to the lower part of the transition plate 1025.

[0036] When organic waste gas is introduced, the buffer plate 1021, the second spring 1022, the support rod 1023 and the sleeve 1024 cooperate with each other to move vertically along the limit frame 1027, providing a buffer force, balancing the pressure fluctuation of the organic waste gas, and reducing the impact force on the subsequent waste gas treatment equipment.

[0037] A method for recovering and treating organic waste gas comprises the following steps: Treatment of organic waste gas: S1: passing the organic waste gas into the sampling pipeline, filtering the organic waste gas, intercepting the particulate matter in the organic waste gas, and passing the filtered organic waste gas into the buffer tank 1 for buffering to balance the pressure fluctuation of the organic waste gas; S2: The buffered organic waste gas is passed through the induced draft fan 2 into the condensing unit 3 for condensation treatment. The organic waste gas is precooled by the precooler, and then passed into the first-stage evaporator to cool the organic waste gas to 0-5°C, remove most of the water vapor and high-boiling point organic waste gas components, and obtain condensate A. The organic waste gas that is not condensed in the first stage is passed into the second-stage evaporator and cooled to -20--30°C, and the residual water vapor and medium-boiling point organic waste gas components are precipitated to obtain condensate B; the organic waste gas components that are not condensed in the second-stage evaporator are passed into the third-stage evaporator and cooled to -55--70°C, and the medium and low boiling point components are further precipitated to obtain condensate C. The organic waste gas after multi-stage condensation treatment is passed into the subcooling exchanger and the precooler for heat exchange, so that the temperature of the organic waste gas rises to 0-25°C, and low-concentration organic waste gas is obtained; S3: Condensate A, condensate B and condensate C are passed into the oil storage tank for recovery, and low-concentration organic waste gas is passed into the first activated carbon tank 401 for adsorption treatment. When the first activated carbon tank 401 is saturated with adsorption, the system automatically switches to the second activated carbon tank 402 for adsorption treatment of the low-concentration organic waste gas, and at the same time, the first activated carbon tank 401 is desorbed, and organic waste gas A is obtained after adsorption treatment; S4: The organic waste gas A and air are introduced into the regenerative oxidation furnace 8 through the gas mixer 6 and the fan 7 for oxidation and decomposition treatment. The organic waste gas A is preheated in a group of regenerative chambers and then enters the oxidation chamber for heating to 760°C to 850°C. The organic components in the organic waste gas A are oxidized and decomposed to obtain high-temperature tail gas. S5: passing the high-temperature tail gas into another group of heat storage chambers, exchanging heat with the ceramic fillers in the heat storage chambers to cool down, and obtaining tail gas. At this time, the tail gas is low-temperature tail gas, and the heat stored in the ceramic fillers can be used for preheating the waste gas in the next cycle. When the indoor temperature of the oxidation chamber of the thermal storage oxidizer 8 is within the set temperature range, the bypass valve 10 is closed, and the tail gas is passed into the mixer 9 through the heat storage chamber for heat exchange and is directly discharged through the gas exhaust pipe. When the indoor temperature of the oxidation chamber of the thermal storage oxidizer 8 is higher than the set temperature range, the bypass valve 10 is opened, and the tail gas, at this time, is the low-temperature tail gas after heat exchange with the ceramic fillers after oxidation and the high-temperature tail gas after oxidation, and is passed into the mixer 9 through the bypass valve 10 for mixing and cooling, and then is discharged through the gas exhaust pipe; Reuse of activated carbon canisters: S6: After the first activated carbon tank 401 is saturated with adsorption, nitrogen is introduced into the first activated carbon tank 401 through the first air supply pipe, and the vacuum pump 5 is turned on at the same time. The first activated carbon tank 401 is vacuum desorbed by the vacuum pump 5 to reduce the pressure of the activated carbon bed, so that the organic waste gas components adsorbed in the activated carbon are separated from the pore structure of the activated carbon and transported from the first activated carbon tank 401 back to the buffer tank 1 for subsequent processing and recovery. At this time, the first activated carbon tank 401 can continue to be used.

[0038] The working principle and use process of the present invention are as follows: the organic waste gas enters the sampling pipe, the particulate matter in the organic waste gas is intercepted by the filter 20, the organic waste gas enters the buffer tank 1, and the organic waste gas enters the inner cylinder along the spiral pipe 101, and passes through the buffer plate 1021. After the buffer plate 1021 is impacted by the air pressure, the buffer plate 1021, the second spring 1022, the support rod 1023 and the sleeve 1024 cooperate with each other to move in the vertical direction along the limit frame 1027, providing a buffering force, balancing the pressure fluctuations of the organic waste gas, and reducing the impact force on the subsequent waste gas treatment equipment.

[0039] When the filter 20 needs to be cleaned: start the hydraulic cylinder 11, the hydraulic cylinder 11 drives the auxiliary frame 12 and the cleaning brush 18 to move in the vertical direction to clean the filter 20, control the hydraulic cylinder 11 to move downward continuously, and the cleaning brush 18 moves to the isolation plate 17 and then continues to move downward to drive the isolation plate 17 to flip downward. At this time, the isolation plate 17 drives the support block 1503 and the first spring 1504 to move along the guide rail 1502, so that the recycling box 15 is in an open state, and the cleaning brush 18 pushes the impurities cleaned from the filter 20 into the recycling box 15, and when the cleaning brush 18 moves downward through the cleaning frame 1501, the impurities on the cleaning brush 18 are also cleaned into the recycling box 15.

[0040] When the filter screen 20 needs to be replaced: pull the upper cover 14 to pull the filter screen 20 out of the first limiting frame 19 for replacement.

[0041] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An organic waste gas recovery and treatment system, characterized in that: The invention comprises a buffer tank (1), a condensation system, a PSA adsorption system and a treatment system, wherein the condensation system comprises an induced draft fan (2) and a condensation unit (3), wherein a first inlet of the buffer tank (1) is connected to a sampling pipeline, a first outlet of the buffer tank (1) is connected to a first inlet pipeline of the condensation unit (3), the induced draft fan (2) is arranged in the pipeline connecting the buffer tank (1) and the condensation unit (3), and a pressure transmitter is arranged on the inlet pipeline of the induced draft fan (2); The PSA adsorption system comprises a first activated carbon tank (401), a second activated carbon tank (402) and a vacuum pump (5); the treatment system comprises a gas mixer (6), a fan (7), a regenerative thermal oxidizer (8), a mixer (9) and a bypass valve (10); the outlet of the condensing unit is connected to the lower inlet of the first activated carbon tank (401) and the lower inlet pipeline of the second activated carbon tank (402); the top outlet of the first activated carbon tank (401) and the top outlet of the second activated carbon tank (402) are connected to the pipeline of the gas mixer (6); the upper inlet pipeline of the regenerative thermal oxidizer (8) is connected to a burner; the regenerative thermal oxidizer (8) is provided with an oxidation chamber, a plurality of regenerative chambers and a plurality of lower chambers. The plurality of groups of regenerative chambers are all provided with ceramic fillers, the gas mixer (6) is connected to the lower inlets of the plurality of groups of lower chambers of the regenerative thermal oxidation furnace (8) through pipelines, a fan (7) is provided in the pipeline connecting the gas mixer (6) and the lower inlets of the plurality of groups of lower chambers of the regenerative thermal oxidation furnace (8), the upper outlet of the regenerative thermal oxidation furnace (8) is connected to the upper inlet pipeline of the mixer (9), the bypass valve (10) is provided in the pipeline connecting the upper outlet of the regenerative thermal oxidation furnace (8) and the upper inlet of the mixer (9), the lower outlet of the regenerative thermal oxidation furnace (8) is connected to the lower inlet pipeline of the mixer (9), and the outlet of the mixer (9) is connected to the gas exhaust pipeline.

2. The organic waste gas recovery and treatment system according to claim 1, characterized in that: The condensing unit (3) comprises a primary evaporator, a secondary evaporator, a tertiary evaporator, an oil storage tank, a subcooling exchanger and a precooler; the outlet of the oil storage tank is connected to the second inlet pipeline of the buffer tank (1); the second inlet of the condensing unit (3) is connected to the second air supply pipeline.

3. The organic waste gas recovery and treatment system according to claim 1 is characterized in that: The first activated carbon tank (401) and the second activated carbon tank (402) are arranged in parallel, the top inlet of the first activated carbon tank (401) and the top inlet of the second activated carbon tank (402) are connected to a first air supply pipe, a cooling water pipe is arranged on one side of the first activated carbon tank (401), and a cooling water pipe is arranged on one side of the second activated carbon tank (402), the lower outlet of the first activated carbon tank (401) and the lower outlet of the second activated carbon tank (402) are connected to the third inlet pipeline of the buffer tank (1), and the vacuum pump (5) is arranged in the pipeline connecting the lower outlet of the first activated carbon tank (401) and the lower outlet of the second activated carbon tank (402) to the third inlet of the buffer tank (1).

4. The organic waste gas recovery and treatment system according to claim 1 is characterized in that: A filter assembly and a cleaning assembly are provided in the sampling pipeline. The filter assembly comprises a first limiting frame (19) and a filter screen (20). The first limiting frame (19) is fixedly connected to the inner wall of the sampling pipeline. The filter screen (20) is slidably connected to the first limiting frame (19). The top of the filter screen (20) is fixedly connected to an upper cover (14). The cleaning assembly comprises a hydraulic cylinder (11), an auxiliary frame (12) and a cleaning brush (18). The hydraulic cylinder (11) is fixedly connected to the cleaning brush (18). The auxiliary frame (12) is fixedly connected to the cleaning brush (18). The position of the cleaning brush (18) corresponds to the position of the filter screen (20). A limiting block (13) is provided above the sampling pipeline. A through hole is provided on the limiting block (13). The auxiliary frame (12) penetrates the through hole of the limiting block (13) and is slidably connected to the limiting block (13).

5. The organic waste gas recovery and treatment system according to claim 4 is characterized in that: A recovery component is arranged below the filter screen (20), and the recovery component is detachably connected to the bottom of the sampling pipeline. The recovery component comprises a recovery box (15), a connecting block (16) and an isolation plate (17). The connecting block (16) is arranged in a T shape, and the connecting block (16) is fixedly connected to the sampling pipeline. The isolation plate (17) is rotatably connected to the connecting block (16) via a second fixing block (1701) and a pin. The isolation plate (17) is arranged in a Z shape, and the isolation plate (17) matches the connecting block (16).

6. The organic waste gas recovery and treatment system according to claim 5, characterized in that: A cleaning frame (1501) and two sets of symmetrically arranged transmission components are arranged inside the recycling box (15), and the transmission components include a guide rail (1502), a support block (1503), a first spring (1504) and a first fixed block (1505). The cleaning frame (1501) is fixedly connected to one side of the recycling box (15), and the position of the cleaning frame (1501) corresponds to the position of the cleaning brush (18). The guide rail (1502) is fixedly connected to the recycling box (15), and the guide rail (1502) is arranged in an arc shape, and an arc-shaped groove is opened along the outer wall of the guide rail (1502).

7. The organic waste gas recovery and treatment system according to claim 6, characterized in that: The first fixing block (1505) is fixedly connected to one side of the groove of the guide rail (1502); the first spring (1504) is arranged at the groove of the guide rail (1502); the first spring (1504) matches the groove of the guide rail (1502); one side of the first spring (1504) is fixedly connected to the first fixing block (1505); the other side of the first spring (1504) is fixedly connected to the support block (1503); a protruding section matching the support block (1503) is arranged at the groove of the guide rail (1502); the support block (1503) is slidably connected to the guide rail (1502) via the protruding section; and a through hole matching the guide rail (1502) is opened on the isolation plate (17).

8. The organic waste gas recovery and treatment system according to claim 1 is characterized in that: The buffer tank (1) is provided with a spiral pipe (101) and an inner cylinder, the inner cylinder is provided with a buffer assembly (102), the buffer assembly (102) comprising a buffer plate (1021), a second spring (1022), a support rod (1023), a sleeve (1024), a transition plate (1025), a base (1026) and a limit frame (1027), the limit frame (1027) being arranged in an annular shape, the limit frame (1027) being fixedly connected to the inner wall of the inner cylinder, the buffer plate (1021) being arranged on the inner side of the limit frame (1027), the buffer plate (1021) being slidably connected to the limit frame (1027), and a sealing layer being arranged between the buffer plate (1021) and the limit frame (1027).

9. The organic waste gas recovery and treatment system according to claim 8, characterized in that: A circle of protruding limiting sections is provided at the bottom of the limiting frame (1027); a plurality of through holes are provided on the buffer plate (1021); a plurality of support rods (1023) are provided; the plurality of support rods (1023) are fixedly connected to the lower part of the buffer plate (1021); the lower part of the support rod (1023) is fixedly connected to the sleeve (1024); a damping layer is provided at the portion where the sleeve (1024) and the support rod (1023) are connected; the second spring (1022) is sleeved on the support rod (1023); the transition plate (1025) is fixedly connected to the lower part of the sleeve (1024); and the base (1026) is fixedly connected to the lower part of the transition plate (1025).

10. An organic waste gas recovery and treatment method, implemented based on an organic waste gas recovery and treatment system according to any one of claims 1 to 9, characterized in that: The steps include: Treatment of organic waste gas: S1: passing the organic waste gas into the sampling pipeline, filtering the organic waste gas, intercepting the particulate matter in the organic waste gas, and passing the filtered organic waste gas into the buffer tank (1) for buffering to balance the pressure fluctuation of the organic waste gas; S2: The organic waste gas after buffering is passed through the induced draft fan (2) into the condensing unit (3) for condensation treatment. The organic waste gas is precooled by the precooler and then passed into the first-stage evaporator to cool the organic waste gas to 0-5°C, remove most of the water vapor and high-boiling point organic waste gas components, and obtain condensate A. The organic waste gas that is not condensed in the first stage is passed into the second-stage evaporator to be cooled to -20--30°C, and the residual water vapor and medium-boiling point organic waste gas components are precipitated to obtain condensate B. The organic waste gas components that are not condensed in the second-stage evaporator are passed into the third-stage evaporator to be cooled to -55--70°C, and the medium and low boiling point components are further precipitated to obtain condensate C. The organic waste gas after the multi-stage condensation treatment is passed into the subcooling exchanger and the precooler for heat exchange, so that the temperature of the organic waste gas rises to 0-25°C, and a low-concentration organic waste gas is obtained; S3: Condensate A, condensate B and condensate C are passed into an oil storage tank for recovery, and low-concentration organic waste gas is passed into a first activated carbon tank (401) for adsorption treatment. When the first activated carbon tank (401) is saturated with adsorption, the system automatically switches to the second activated carbon tank (402) to adsorb the low-concentration organic waste gas, and at the same time, the first activated carbon tank (401) is desorbed, and organic waste gas A is obtained after adsorption treatment; S4: passing the organic waste gas A and air through a gas mixer (6) and a fan (7) into a regenerative oxidation furnace (8) for oxidation and decomposition treatment. The organic waste gas A is preheated in a group of regenerative chambers and then enters the oxidation chamber for heating to 760° C. to 850° C. The organic components in the organic waste gas A are oxidized and decomposed to obtain high-temperature tail gas. S5: passing the high-temperature tail gas into another group of heat storage chambers to exchange heat with the ceramic fillers in the heat storage chambers to reduce the temperature, thereby obtaining tail gas. When the indoor temperature of the oxidation chamber of the regenerative thermal oxidation furnace (8) is within the set temperature range, the bypass valve (10) is closed, and the tail gas is passed through the heat storage chamber for heat exchange and then directly discharged through the gas discharge pipe. When the indoor temperature of the oxidation chamber of the regenerative thermal oxidation furnace (8) is higher than the set temperature range, the bypass valve (10) is opened, and the tail gas is passed through the bypass valve (10) and then into the mixer (9) for mixing and cooling, and then discharged through the gas discharge pipe. Reuse of activated carbon canisters: S6: After the first activated carbon tank (401) is saturated with adsorption, nitrogen is introduced into the first activated carbon tank (401) through the first air supply pipe, and the vacuum pump (5) is turned on at the same time. The vacuum pump (5) performs vacuum desorption on the first activated carbon tank (401) to reduce the pressure of the activated carbon bed, so that the organic waste gas components adsorbed in the activated carbon are separated from the pore structure of the activated carbon and transported from the first activated carbon tank (401) back to the buffer tank (1) for subsequent processing and recovery. At this time, the first activated carbon tank (401) can continue to be used.

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