A VOC gas treatment device based on gas concentration and use method

Abstract

The present invention provides a VOC gas treatment device based on gas concentration and a method of use, which relates to the field of gas treatment technology, including a zeolite rotor device, a cooling box and a desorption box are arranged on the surface of the zeolite rotor device, a circulating air pump is installed on one side of the air inlet of the cooling box, and the circulating air pump is used to pump low-temperature gas into the air inlet of the cooling box, and also includes: two groups of heat-insulating shells arranged at the air inlet and outlet of the zeolite rotor device, and a plurality of heat exchange plates are arranged inside the heat-insulating shells; an air bag arranged on one side of the zeolite rotor device and heat exchangers respectively arranged on the surfaces of the two groups of heat-insulating shells; a plurality of small unit water tanks arranged on one side of the zeolite rotor device, and a plurality of electric control valves are installed on the surface of the small unit water tanks; a gas-liquid recovery hood and a gas-liquid introduction hood arranged inside the heat-insulating shell. The present invention can recycle the heat of the high-temperature and low-concentration VOC gas introduced into the device, thereby reducing the energy consumption of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of gas treatment, and in particular to a VOC gas treatment device based on gas concentration. Background Art

[0002] VOC gas refers to Volatile Organic Compounds, which is a class of organic substances that are easily volatile at room temperature. Zeolite wheels are often used to concentrate large-volume, low-concentration VOC gases, and then the concentrated VOC gases are treated.

[0003] The temperature of VOC gas generated during the production process of plastics and rubber can reach 100℃ to 300℃. During the concentration process, it needs to be reduced to the optimal absorption temperature range of 20℃ to 50℃ for the zeolite wheel. The related concentrated VOC gas treatment methods often use direct combustion and condensation methods. The direct combustion method has the disadvantages of high energy consumption and difficulty in recovering valuable organic matter. The condensation method requires the installation of refrigeration equipment and supporting facilities, and has the disadvantage of high initial cost. In addition, the condensation method is not easy to utilize the higher temperature of VOC gas before it is concentrated by the zeolite wheel. The high-temperature VOC gas after concentration needs to be cooled again, which has high requirements for refrigeration equipment and is not conducive to energy recovery. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a VOC gas treatment device based on gas concentration. By means of two groups of heat exchange plates arranged on both sides of the zeolite rotor equipment, the heat of the high-temperature and low-concentration VOC gas input into the device can be transferred. By means of the gas-liquid recovery hood and the gas-liquid inlet hood arranged on both sides of the heat exchange plates, the heat exchange plates can be continuously cleaned to ensure the heat exchange efficiency of the heat exchange plates.

[0005] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0006] A VOC gas treatment device based on gas concentration, comprising a zeolite rotor device, a cooling box and a desorption box are arranged on the surface of the zeolite rotor device, a circulating air pump is installed on one side of the air inlet of the cooling box, and the circulating air pump is used to pump low-temperature gas into the air inlet of the cooling box, and also includes:

[0007] The first heat recovery component comprises two sets of heat-insulating shells arranged at the air inlet and the air outlet of the zeolite rotor device, wherein a plurality of heat exchange fins are arranged inside the heat-insulating shells, and the surfaces of the heat exchange fins are respectively provided with supporting circular tubes and protective circular sleeves, and the heat exchange fins perform heat exchange with the VOC gas before concentration and with the filtered gas discharged after the VOC gas is concentrated;

[0008] The second heat recovery component includes an air bag arranged on one side of the zeolite rotor device and heat exchangers respectively arranged on the surfaces of two groups of heat-insulating shells, wherein the air bag is used to store part of the hotter air discharged from the cooling box exhaust port after heat exchange with the zeolite rotor in the cooling box, and cooperates with one of the heat exchangers to make the temperature of the gas entering the air inlet of the desorption box reach a set value, and the heat exchanger is used to participate in the heat exchange of the liquid inside the heat exchange plate;

[0009] Temperature control component: comprising a plurality of small unit water tanks arranged on one side of the zeolite rotor device, a plurality of electric control valves are installed on the surface of the small unit water tanks, the small unit water tanks and the electric control valves are connected with the heat exchange plate and the inside of the heat exchanger through pipelines, and mixed liquid heat exchange is performed through one of the small unit water tanks and the liquid with a temperature reaching the set value is output;

[0010] A cleaning component: comprising a gas-liquid recovery hood and a gas-liquid inlet hood arranged inside the heat-insulating shell, a plurality of blocking rods are arranged inside the gas-liquid inlet hood and the gas-liquid recovery hood, a strip nozzle is arranged inside the gas-liquid inlet hood, the blocking rods are used to block the air gaps formed between adjacent heat exchange plates, the strip nozzle is used to spray liquid to clean the heat exchange plates, an air flow is blown from the gas-liquid inlet hood to the gas-liquid inlet hood, the supporting circular tube is rotatably connected in the through grooves provided on the surfaces of the gas-liquid inlet hood and the strip nozzle, and is used to blow out the liquid carrying dirt on the surface of the heat exchange plate and to air-dry the liquid remaining on the surface of the heat exchange plate, a driven fan blade is arranged inside the heat-insulating shell, and the driven fan blade is used to drive the protective circular sleeve to rotate.

[0011] Furthermore, the first heat recovery component also includes a supporting circular tube arranged inside the thermal insulation shell, and the surface of the supporting circular tube is provided with through grooves matching the heat exchange plates near the two ends, and the heat exchange plates are fixedly connected to the corresponding through grooves on the surface of the supporting circular tube through water inlets and water outlets protruding from the surface, and the two ends of the supporting circular tube are rotatably connected to connecting circular tubes through first bearings and rotating sealing rings respectively, and a protective circular sleeve is provided on the outside of the supporting circular tube, and the annular array of heat exchange plates is arranged inside the protective circular sleeve, the heat exchange plates are fixedly connected to the protective circular sleeve, and the protective circular sleeve is rotatably connected to the thermal insulation shell through a second bearing.

[0012] Furthermore, the second heat recovery component also includes a first circular plate and a third circular plate arranged on the surface of the airbag, the surface of the first circular plate is fixedly connected to a plurality of limiting circular rods in an annular array, the third circular plate is slidably connected to the limiting circular rods through circular holes opened in an annular array on the surface, the end of the limiting circular rod is fixedly connected to the second circular plate, the surface of the second circular plate is installed with an electric push rod, the end of the output shaft of the electric push rod passes through the surface of the second circular plate and extends between the second circular plate and the third circular plate, the end of the output shaft of the electric push rod is fixedly connected to a pushing block, the airbag is connected to the interior of one of the heat exchangers through a pipe, and the air outlet of the desorption box is connected to the interior of the heat exchanger through a pipe.

[0013] Furthermore, the temperature control component also includes a liquid temperature sensor, a heater, a mixing tank and a water pump arranged on one side of the small unit water tank, the liquid temperature sensor, the heater and the mixing tank are connected in sequence through pipes, the liquid temperature sensor is connected to one of the electric control valves through a pipe, and the water pump is connected to the heat exchanger arranged on the air inlet side of the zeolite rotor equipment through a pipe.

[0014] Furthermore, the cleaning component also includes arc blocks symmetrically arranged inside the gas-liquid inlet hood and the gas-liquid recovery hood, respectively, the sealing rods are fixedly connected to the surfaces of the two arc blocks, the gas-liquid inlet hood is provided with a blowing groove, the four arc blocks are respectively fixedly connected to the gas-liquid recovery hood and the gas-liquid inlet hood, the gas-liquid recovery hood and the gas-liquid inlet hood are both fixedly connected to the thermal insulation shell, the supporting circular tube is respectively connected to the two strip nozzles through a pipeline, the air bag is connected to the gas-liquid inlet hood through a pipeline, and the surfaces of the gas-liquid recovery hood and the gas-liquid inlet hood are both in contact with the surface of the heat exchange plate.

[0015] Furthermore, two of the small unit water tanks form a liquid mixing group, and the remaining several small unit water tanks form a water supply group;

[0016] The liquid mixing group also includes two electrically controlled valves arranged between the two small unit water tanks, and the electrically controlled valves are connected to the interior of the two small unit water tanks through two pipes respectively, one of the electrically controlled valves is connected to one of the connecting circular pipes arranged on the air inlet side of the zeolite rotor equipment through a pipe, and the other electrically controlled valve is connected to the liquid temperature sensor through a pipe.

[0017] Furthermore, the water supply group also includes two liquid temperature sensors arranged between several of the small unit water tanks, the two electrically controlled valves are electrically controlled multi-way pipes, the water inlets of all the small unit water tanks of the water supply group are connected to one of the electrically controlled valves through a pipe, and the water outlets of all the small unit water tanks are connected to another electrically controlled valve through a pipe, the electrically controlled valve connected to the water inlet is connected to one of the heat exchangers through a pipe, and the electrically controlled valve connected to the water outlet is connected to the inside of one of the connecting circular tubes through a pipe.

[0018] Furthermore, the surfaces of the blocking rod away from the arc block are respectively fixedly connected with pushing protrusions, the surface of the protective circular sleeve is symmetrically provided with two groups of protrusions, each group of the protrusions is fixedly connected to the surface of the protective circular sleeve in an annular array, the surface of the supporting circular tube is symmetrically provided with annular grooves, the arc blocks are respectively slidably connected to the supporting circular tube through the annular grooves, and the driven fan blades are fixedly connected to the surface of the supporting circular tube in an annular array.

[0019] Furthermore, the two sides of the heat exchange plate are arranged as inclined surfaces, so that when the moving protrusion slides over the surface of the protrusion to drive the blocking rod to undergo elastic deformation, the blocking rod leaves the air gap formed by the corresponding heat exchange plate.

[0020] Furthermore, a VOC gas treatment method based on gas concentration comprises the following steps:

[0021] Step 1: The filtered VOC gas is introduced into the heat-insulating shell on the air inlet side of the zeolite wheel device and cooled to the adsorption temperature of the zeolite wheel device. At the same time, part of the temperature of this part of the VOC gas is stored in the water tank of the mixing liquid group;

[0022] Step 2: The liquid after heat exchange in step 1 enters the corresponding small unit water tanks according to the set temperature, and then the liquid below the set temperature enters the mixing tank through the heater to complete the temperature exchange, and the heater supplements the heating of the liquid entering the mixing tank;

[0023] Step three, after the cooling gas blown into the air inlet of the cooling box passes through the zeolite rotor device for heat exchange, a part of it is directed to the heat-insulating shell on the air outlet side of the zeolite rotor device, and a part of it is directed to the airbag for storage. When switching to the desorption process, the gas stored in the airbag flows to the heat exchanger on the air inlet side of the zeolite rotor device to be heated. At the same time, the liquid in the mixing box in step two is also passed into the heat exchanger, and the gas heated to the set temperature is passed into the air inlet of the desorption box, and the VOC gas after heat exchange is introduced into the heat exchanger on the air outlet side of the zeolite rotor device;

[0024] In step four, the gas discharged from the air outlet of the zeolite rotor equipment is passed into the insulating shell on one side of the air outlet of the zeolite rotor equipment for cooling, and the heat exchanger arranged on the side of the air inlet of the zeolite rotor equipment passes the liquid after heat exchange into one of the connecting circular tubes on one side of the air outlet of the zeolite rotor equipment, and the other connecting circular tube passes the cooled liquid into the heat exchanger on the side of the air outlet of the zeolite rotor equipment, so as to cool the gas introduced into the heat exchanger in step three, and the heat exchanger then passes the heated liquid into one of the small unit water tanks through an electric control valve for static cooling, and the other electric control valve passes one of the small unit water tanks storing liquid at a suitable temperature into one of the connecting circular tubes arranged on the side of the air inlet of the zeolite rotor equipment, so as to cool the VOC gas in step one.

[0025] The above solution of the present invention includes at least the following beneficial effects:

[0026] In the above scheme of the present invention, during the process of concentrating the high-temperature, low-concentration VOC gas introduced into the device into a high-concentration VOC gas, the heat carried by the low-concentration VOC gas is used for desorption by the zeolite wheel while cooling the low-concentration VOC gas, and the gas adsorbed by the zeolite is used to initially cool the concentrated VOC gas, thereby reducing the device's requirements for the use of heating equipment and condensing equipment or reducing the operating power of the heating equipment and condensing equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram provided by an embodiment of the present invention.

[0028] Figure 2 It is a schematic diagram of a fan blade provided by an embodiment of the present invention.

[0029] Figure 3 It is a schematic diagram of a protective sleeve provided by an embodiment of the present invention.

[0030] Figure 4 It is a schematic diagram of a heat exchange plate provided by an embodiment of the present invention.

[0031] Figure 5 The embodiments of the present invention provide Figure 3 Enlarged view of point A in the middle.

[0032] Figure 6 It is a schematic diagram of a supporting circular tube provided in an embodiment of the present invention.

[0033] Figure 7 It is a schematic diagram of a blocking rod provided by an embodiment of the present invention.

[0034] Figure 8 It is a schematic diagram of an airbag provided by an embodiment of the present invention.

[0035] Fig. 9 It is a schematic diagram of a small unit water tank provided by an embodiment of the present invention.

[0036] In the figure: 101, zeolite wheel equipment; 102, cooling box; 103, desorption box; 201, insulation shell; 202, protective sleeve; 203, supporting tube; 204, heat exchange plate; 205, connecting tube; 301, air bag; 302, heat exchanger; 303, first round plate; 304, limit round rod; 305, second round plate; 306, electric push rod; 307, push block; 308, third round Plate; 401, small unit water tank; 402, electric control valve; 403, liquid temperature sensor; 404, heater; 405, mixing liquid box; 406, water pump; 501, gas-liquid recovery cover; 502, gas-liquid inlet cover; 503, strip nozzle; 504, blocking rod; 505, driven fan blade; 506, convex block; 507, blowing groove; 508, arc block; 509, toggle convex part; 510, annular groove. DETAILED DESCRIPTION

[0037] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0038] like Figures 1 to 9 As shown, an embodiment of the present invention proposes a VOC gas treatment device based on gas concentration, including a zeolite rotor device 101, a cooling box 102 and a desorption box 103 are arranged on the surface of the zeolite rotor device 101, a circulating air pump is arranged on one side of the air inlet of the cooling box 102, and further includes:

[0039] The first heat recovery component includes two sets of heat-insulating shells 201 arranged at the air inlet and the air outlet of the zeolite rotor device 101, a plurality of heat exchange fins 204 are arranged inside the heat-insulating shells 201, and the surfaces of the heat exchange fins 204 are respectively provided with supporting circular tubes 203 and protective circular sleeves 202, and the heat exchange fins 204 perform heat exchange with the VOC gas before concentration and perform heat exchange with the filtered gas discharged after the VOC gas is concentrated;

[0040] The second heat recovery component includes an air bag 301 arranged on one side of the zeolite rotor device 101 and heat exchangers 302 respectively arranged on the surface of two groups of heat-insulating shells 201. The air bag 301 is used to store part of the hotter air discharged from the exhaust port of the cooling box 102 after heat exchange with the zeolite rotor in the cooling box 102, and cooperates with one of the heat exchangers 302 to make the temperature of the gas entering the air inlet of the desorption box 103 reach the set value. The heat exchanger 302 is used to participate in the heat exchange of the liquid inside the heat exchange plate 204;

[0041] Temperature control component: including a plurality of small unit water tanks 401 arranged on one side of the zeolite wheel device 101, a plurality of electric control valves 402 are installed on the surface of the small unit water tanks 401, the small unit water tanks 401 and the electric control valves 402 are connected with the heat exchange plate 204 and the inside of the heat exchanger 302 through pipelines, and the mixed liquid is heat exchanged through one of the small unit water tanks 401 and the liquid with the set temperature is output;

[0042] Cleaning component: includes a gas-liquid recovery hood 501 and a gas-liquid inlet hood 502 arranged inside the heat-insulating shell 201, a plurality of blocking rods 504 are arranged inside the gas-liquid inlet hood 502 and the gas-liquid recovery hood 501, a strip nozzle 503 is arranged inside the gas-liquid inlet hood 502, the blocking rods 504 are used to block the air gaps formed between adjacent heat exchange plates 204, the strip nozzle 503 is used to spray liquid to clean the heat exchange plates 204, the air flow is blown from the gas-liquid inlet hood 502 to the gas-liquid inlet hood 502, the supporting circular tube 203 is rotatably connected to the through grooves provided on the surfaces of the gas-liquid inlet hood 502 and the strip nozzle 503, and is used to blow out the liquid carrying dirt on the surface of the heat exchange plates 204 and air-dry the liquid remaining on the surface of the heat exchange plates 204, the heat-insulating shell 201 is provided with a driven fan blade 505, and the driven fan blade 505 is used to drive the protective circular sleeve 202 to rotate.

[0043] In the embodiment of the present invention, the air inlets of the zeolite rotor device 101, the cooling box 102 and the desorption box 103 are all arranged on the right side, and the air outlets are all arranged on the left side, and the filtered large air volume and low concentration VOC gas is introduced into the right opening of the heat-insulating shell 201 arranged on the right side, so that the low concentration VOC gas reduces the temperature to the optimal temperature for adsorption by the zeolite rotor device 101, and the heat corresponding to the reduced temperature is stored in a part of the small unit water tank 401 for heating the gas introduced into the air inlet of the desorption box 103, thereby reducing the power consumption and use requirements of the device for the heating device;

[0044] At the same time, the low-temperature air pumped into the air inlet of the cooling box 102 by the circulating air pump exchanges heat with the zeolite of the zeolite rotor device 101, and the zeolite is cooled to the required temperature, and the heated air is blown out at the same time. A part of this part of the gas is blown into the heat exchanger 302 arranged on the right side through the pipeline, and is heated to the desorption temperature by the heat exchanger 302 on the right side, thereby further reducing the power consumption and use requirements of the device for the heating equipment;

[0045] A portion of the liquid heated up after heat exchange through the heat exchange plate 204 in the right heat-insulating outer shell 201 passes through a pipe into the strip nozzle 503, and is sprayed toward the air gaps formed between the heat exchange plates 204 through the strip nozzle 503. The airflow blown out by the blowing groove 507 takes away the portion of the liquid, and dries the remaining liquid, thereby completing the cleaning of the heat exchange plate 204, thereby ensuring the heat exchange efficiency of the heat exchange plate 204. At the same time, the large amount of VOC gas introduced into the right heat-insulating outer shell 201 will drive the supporting circular tube 203 to rotate through the driven fan blade 505, thereby cleaning all the air gaps formed between the heat exchange plates 204.

[0046] In a preferred embodiment of the present invention, the first heat recovery component also includes a supporting circular tube 203 arranged inside the heat-insulating outer shell 201, and a through groove matching the heat exchange plate 204 is opened on the surface of the supporting circular tube 203 near the two ends. The heat exchange plate 204 is fixedly connected to the corresponding through groove on the surface of the supporting circular tube 203 through a water inlet and a water outlet protruding from the surface. The two ends of the supporting circular tube 203 are rotatably connected to a connecting circular tube 205 through bearings and a rotating sealing ring respectively. A protective circular sleeve 202 is arranged on the outside of the supporting circular tube 203, and a ring array of heat exchange plates 204 is arranged inside the protective circular sleeve 202. The heat exchange plates 204 are fixedly connected to the protective circular sleeve 202, and the protective circular sleeve 202 is rotatably connected to the heat-insulating outer shell 201 through a second bearing.

[0047] In the embodiment of the present invention, the flow direction of the liquid through the inside of the thermal insulation shell 201 is to enter one end of the supporting circular tube 203 from one of the connecting circular tubes 205, then enter the heat exchange plate 204 through the through groove close to the end of the supporting circular tube 203, then enter another through groove inside the supporting circular tube 203 through the heat exchange plate 204, and finally enter another connecting circular tube 205 through the other end of the supporting circular tube 203, so as to facilitate heat exchange between the heat exchange plate 204 and the hot air flow.

[0048] In an embodiment of the present invention, the second heat recovery component also includes a first circular plate 303 and a third circular plate 308 arranged on the surface of the airbag 301. The surface of the first circular plate 303 is fixedly connected with a plurality of limiting circular rods 304 in an annular array. The third circular plate 308 is slidably connected to the limiting circular rods 304 through circular holes opened in an annular array on the surface. The end of the limiting circular rod 304 is fixedly connected with the second circular plate 305. The surface of the second circular plate 305 is installed with an electric push rod 306. The end of the output shaft of the electric push rod 306 passes through the surface of the second circular plate 305 and extends between the second circular plate 305 and the third circular plate 308. The end of the output shaft of the electric push rod 306 is fixedly connected with a pushing block 307. The airbag 301 is connected to the interior of one of the heat exchangers 302 through a pipeline, and the air outlet of the desorption box 103 is connected to the interior of the heat exchanger 302 through a pipeline.

[0049] like Figure 1 As shown, it should be noted that: L1 and L2 are provided on the surface of the airbag 301, and the pipeline is connected to the airbag 301 through L1 and L2, L1 allows the gas to pass into the airbag 301, and L2 allows the gas to be discharged from the airbag 301;

[0050] In an embodiment of the present invention, the zeolite of the zeolite rotor device 101 is cooled to a set temperature by low-temperature air blown by a circulating air pump. In this process, the air temperature that first exchanges heat with the zeolite is relatively high, and is passed through a pipeline and L1 into the interior of the airbag 301 for storage. Specifically, the gas will expand the airbag 301 in the process of passing into the airbag 301, and make the third circular plate 308 slide toward the second circular plate 305 on the surface of the limiting circular rod 304 until the third circular plate 308 moves to abut against the pushing block 307. The remaining gas is passed through a pipeline into the interior of the thermal insulation shell 201 on the left and discharged from the device. When the device is switched to desorption operation, the electric push rod 306 is started so that the electric push rod 306 pushes the third circular plate 308 through the pushing block 307 to compress the airbag 301 between the third circular plate 308 and the first circular plate 303, so that the hot air stored in the airbag 301 is passed through a pipeline into the heat exchanger 302 on the right for heating. This process can reduce the device's requirements for the use of the heating device or reduce the power consumption of the heating device.

[0051] In an embodiment of the present invention, the temperature control component also includes a liquid temperature sensor 403, a heater 404, a mixing liquid box 405 and a water pump 406 arranged on one side of the small unit water tank 401. The liquid temperature sensor 403, the heater 404 and the mixing liquid box 405 are connected in sequence through pipelines. The liquid temperature sensor 403 is connected to one of the electric control valves 402 through a pipeline, and the water pump 406 is connected to the heat exchanger 302 arranged on the air inlet side of the zeolite wheel device 101 through a pipeline.

[0052] Two of the small unit water tanks 401 form a liquid mixing group, and the remaining small unit water tanks 401 form a water supply group;

[0053] The liquid mixing group also includes two electrically controlled valves 402 arranged between the two small unit water tanks 401. The electrically controlled valves 402 are connected to the inside of the two small unit water tanks 401 through two pipes respectively. One of the electrically controlled valves 402 is connected to one of the connecting circular pipes 205 arranged on the air inlet side of the zeolite wheel device 101 through a pipe, and the other electrically controlled valve 402 is connected to the liquid temperature sensor 403 through a pipe.

[0054] The water supply group also includes two liquid temperature sensors 403 arranged between several small unit water tanks 401, and the two electrically controlled valves 402 are electrically controlled multi-way pipes. The water inlets of all small unit water tanks 401 of the water supply group are connected to one of the electrically controlled valves 402 through a pipeline, and the water outlets of all small unit water tanks 401 are connected to another electrically controlled valve 402 through a pipeline. The electrically controlled valve 402 connected to the water inlet is connected to one of the heat exchangers 302 through a pipeline, and the electrically controlled valve 402 connected to the water outlet is connected to the inside of one of the connecting circular tubes 205 through a pipeline.

[0055] like Fig. 9 As shown, in this embodiment, two small unit water tanks 401 connected to the liquid temperature sensor 403 are a mixed liquid group, one of which is a low-temperature tank and the other is a high-temperature tank. The other two small unit water tanks 401 are water supply groups, one of which is a first tank body and the other is a second tank body. The electric control valves 402 are all electric control three-way valves and have a temperature sensing function.

[0056] In this embodiment, the temperature of VOC gas generated in the plastic and rubber production process is between 150°C and 250°C, the temperature of the gas introduced into the air inlet of the desorption box 103 is 180°C, and the temperature of the divided liquid of the mixed liquid group is set to 200°C;

[0057] The liquid after heat exchange inside the right insulation shell 201 enters one of the electric control valves 402 of the mixing liquid group through the pipeline. The electric control valve 402 allows the liquid above 200°C to pass into the high temperature box, and the liquid below 200°C to pass into the low temperature box. In order to allow the gas reaching the set temperature to pass into the air inlet of the desorption box 103, another electric control valve 402 of the mixing liquid group cooperates with the liquid temperature sensor 403 to pass a certain proportion of the liquid in the high temperature box and the low temperature box into the interior of the mixing liquid box 405, and is pumped into the interior of the right heat exchanger 302 through the water pump 406 to heat the gas entering the air inlet of the desorption box 103;

[0058] When the liquid in the high temperature box is insufficient, the liquid in the low temperature box will be heated to the required temperature when passing through the heater 404 , thereby ensuring the desorption work of the desorption box 103 .

[0059] In an embodiment of the present invention, the cleaning component also includes arc blocks 508 symmetrically arranged inside the gas-liquid inlet hood 502 and the gas-liquid recovery hood 501, respectively, the sealing rods 504 are fixedly connected to the surfaces of the two arc blocks 508, the gas-liquid inlet hood 502 is provided with a blowing groove 507, the four arc blocks 508 are respectively fixedly connected to the gas-liquid recovery hood 501 and the gas-liquid inlet hood 502, the gas-liquid recovery hood 501 and the gas-liquid inlet hood 502 are both fixedly connected to the insulation shell 201, the supporting circular tube 203 is respectively connected to the two strip nozzles 503 through a pipeline, the air bag 301 is connected to the gas-liquid inlet hood 502 through a pipeline, and the surfaces of the gas-liquid recovery hood 501 and the gas-liquid inlet hood 502 are both in contact with the surface of the heat exchange plate 204.

[0060] The surfaces of the sealing rod 504 away from the arc block 508 are fixedly connected with the pushing protrusions 509 respectively, and the surface of the protective sleeve 202 is symmetrically provided with two groups of protrusions 506, and each group of protrusions 506 is fixedly connected to the surface of the protective sleeve 202 in an annular array, and the surface of the supporting circular tube 203 is symmetrically provided with annular grooves 510, and the arc blocks 508 are slidingly connected to the supporting circular tube 203 through the annular grooves 510, and the driven fan blades 505 are fixedly connected to the surface of the supporting circular tube 203 in an annular array.

[0061] The two sides of the heat exchange plate 204 are set as inclined surfaces, so that when the moving protrusion 509 slides over the surface of the protrusion 506 to drive the blocking rod 504 to undergo elastic deformation, the blocking rod 504 leaves the air gap formed by the corresponding heat exchange plate 204.

[0062] like Figure 3 , Figure 5 and Figure 7 As shown, when the protective sleeve 202 drives the heat exchanger fins 204 to rotate, the moving protrusion 509 continuously slides over the protrusion 506, so that the blocking rod 504 follows the moving track of the moving protrusion 509 and undergoes periodic elastic deformation, so that the blocking rod 504 sequentially blocks the air gaps formed between the heat exchanger fins 204;

[0063] In this embodiment, four blocking rods 504 are arranged on the surface of each arc block 508, and the axial direction of the four blocking rods 504 is the same as the extension direction of each air gap. Among the four blocking rods 504, the two blocking rods 504 located on the outside are in contact with the inner walls of the gas-liquid recovery cover 501 and the gas-liquid introduction cover 502 respectively, so that the liquid sprayed by the strip nozzle 503 is difficult to seep out from the contact part, and then seep into the external gas gaps of the gas-liquid recovery cover 501 and the gas-liquid introduction cover 502, affecting the adsorption efficiency of the zeolite rotor device 101. The two blocking rods 504 located in the middle make the liquid that is not directly sprayed into the air gap by the strip nozzle 503 be continuously blown out by the blowing groove 507 as the elastic deformation of the two middle blocking rods 504 The airflow is brought into the adjacent air gap, thereby ensuring that the amount of water entering the air gap is sufficient to complete the cleaning work. At the same time, the two groups of sealing rods 504 arranged inside the gas-liquid recovery cover 501 cooperate with the two groups of sealing rods 504 in the gas-liquid inlet cover 502, so that when the openings on both sides of the air gap are blocked by the sealing rods 504 at the same time, the cleaning time of the liquid in the air gap on the surface of the heat exchange plate 204 can be extended. The inclined surface of the heat exchange plate 204 is set so that the surface of the heat exchange plate 204 in the annular array forms a conical surface with uniform air gaps, thereby cooperating with the gradual decrease in the deformation of the sealing rod 504 from the part away from the central axis of the supporting circular tube 203 to the part close to the central axis of the supporting circular tube 203, it is convenient to complete the sealing of the air gap by the sealing rod 504.

[0064] A VOC gas treatment method based on gas concentration comprises the following steps:

[0065] Step 1: The filtered VOC gas is introduced into the heat-insulating housing 201 on the air inlet side of the zeolite rotor device 101 and cooled to the adsorption temperature of the zeolite rotor device 101. At the same time, part of the temperature of this part of the VOC gas is stored in the water tank of the mixing liquid group;

[0066] Step 2: The liquid after heat exchange in step 1 enters the corresponding small unit water tank 401 according to the set temperature, and then the liquid below the set temperature enters the mixing tank 405 through the heater 404 to complete the temperature exchange. The heater 404 supplements the heating of the liquid entering the mixing tank 405.

[0067] Step three, after the cooling gas blown into the air inlet of the cooling box 102 passes through the zeolite rotor device 101 for heat exchange, a part of it is directed to the heat-insulating shell 201 on the air outlet side of the zeolite rotor device 101, and a part of it is directed to the air bag 301 for storage. When switching to the desorption process, the gas stored in the air bag 301 flows to the heat exchanger 302 on the air inlet side of the zeolite rotor device 101 to increase the temperature. At the same time, the liquid in the mixing box 405 in step two is also passed into the heat exchanger 302, and the gas heated to the set temperature is passed into the air inlet of the desorption box 103, and the VOC gas after heat exchange is introduced into the heat exchanger 302 on the air outlet side of the zeolite rotor device 101;

[0068] In step 4, the gas discharged from the air outlet of the zeolite rotor device 101 is passed into the insulating shell 201 on the side of the air outlet of the zeolite rotor device 101 for cooling, and the heat exchanger 302 arranged on the side of the air inlet of the zeolite rotor device 101 passes the liquid after heat exchange into one of the connecting circular tubes 205 on the side of the air outlet of the zeolite rotor device 101, and the other connecting circular tube 205 passes the cooled liquid into the heat exchanger 302 on the side of the air outlet of the zeolite rotor device 101, so as to cool the gas introduced into the heat exchanger 302 in step 3, and the heat exchanger 302 then passes the heated liquid into one of the small unit water tanks 401 through the electric control valve 402 for static cooling, and the other electric control valve 402 passes one of the small unit water tanks 401 storing liquid at a suitable temperature into one of the connecting circular tubes 205 arranged on the side of the air inlet of the zeolite rotor device 101, so as to cool the VOC gas in step 1.

[0069] It should be noted that after being blocked by the blocking rod 504, a small amount of liquid still seeps into the heat exchange plate 204 to form the air gap. The effect of this part of liquid on the adsorption efficiency of the zeolite wheel device 101 is small and can be ignored.

[0070] like Figures 1 to 9As shown, in this embodiment, it should be noted that: the working principles and usage methods of the zeolite wheel equipment 101, the cooling box 102 and the desorption box 103 are well known in the prior art and will not be described in detail here; some pipelines of this device are not drawn, and the connection method of the pipeline of this device can be a threaded connection, or a corresponding reserved groove can be opened in the corresponding component, and one end of the pipeline is fixed in the reserved groove so that the inside of the pipeline is connected to the inside of the corresponding component, and a reserved groove can be opened on the surface of the component for the pipeline to pass through. If the sealed connection is maintained, a rotating sealing ring or sealing glue can be used in conjunction with the use of the prior art, which is the prior art and will not be described in detail; the electric control valve 402 is an electric control three-way valve in the mixing liquid group, and the number of pipe openings of the electric control valve 402 in the water supply group is set to a small unit water The number of boxes 401 is increased by one, and the electric control valves 402 all have temperature sensing functions; both sides of the gas-liquid recovery cover 501 and the gas-liquid introduction cover 502 are provided with openings, and the areas corresponding to the two openings of the heat-insulating shell 201 are also provided with openings, so that the interiors of the gas-liquid recovery cover 501 and the gas-liquid introduction cover 502 are connected to the exterior of the heat-insulating shell 201; the amount of gas stored in the airbag 301 is sufficient, and when the airbag 301 blows air into the gas-liquid introduction cover 502 through a pipeline, an electric control one-way valve can be set on the pipeline connecting the airbag 301 and the gas-liquid introduction cover 502, so that the airflow blown into the gas-liquid introduction cover 502 is uninterrupted; this device can be used in conjunction with a gas filter, and the installation setting of the gas filter is well known in the prior art and will not be repeated here;

[0071] When the device is in use, the water sprayed by the strip nozzle 503 needs to be regularly replenished in the small unit water tank 401.

[0072] like Figures 1 to 9 As shown, in this embodiment, G1, G2, G3 and G4 are respectively the gas outlet, liquid outlet, liquid inlet and gas inlet of the right heat exchanger 302; D1, D2, D3 and D4 are respectively the gas outlet, liquid outlet, liquid inlet and gas inlet of the left heat exchanger 302; Q1 and Q2 are respectively the gas outlet of the gas-liquid recovery cover 501 and the gas inlet of the gas-liquid introduction cover 502; H1 is the pipe opening of the pipeline connected to the water outlet of the water pump 406, and H2 is the right The liquid flowing out of the side insulation shell 201 enters a pipe opening of the electric control valve 402 through which the mixed liquid group passes, H3 is a pipe opening through which the liquid temperature sensor 403 passes from the left insulation shell 201 to the water supply group, H4 is a pipe opening of another liquid temperature sensor 403 of the water supply group leading to the inside of the insulation shell 201, and the connecting round pipes 205 are named a1, a2, a3 and a4 from left to right; N1 is a three-way connecting pipe, and N2 is a connecting capillary; Figure 6 As shown, S1 is a through groove starting from the surface of the supporting circular tube 203; Figure 2 As shown, S2 is a pipe connected to the liquid outlet of the cooling box 102, and S3 is a branch pipe extending from the surface of S2;

[0073] The flow direction of the liquid in this device and the connection relationship of some pipelines are: H4→a4→a3→H1→H2→G3→G2→D3→D2→a2→a1→H3;

[0074] Supporting circular tube 203 → N1 → N2 → strip nozzle 503;

[0075] The flow direction of the gas in this device and the connection relationship of some pipelines are: cooling box 102 air outlet → L1 → L2 → G4 → G1 → desorption box 103 air inlet → desorption box 103 air outlet → D4 → D1 → condensation device;

[0076] S3→L2→Q2→Q3→Waste liquid and waste gas treatment mechanism If the discharged gas and liquid meet the emission standards, this mechanism may not be set up;

[0077] The above are preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A VOC gas treatment device based on gas concentration, comprising a zeolite rotor device (101), a cooling box (102) and a desorption box (103) being arranged on the surface of the zeolite rotor device (101), a circulating air pump being installed on one side of the air inlet of the cooling box (102), the circulating air pump being used to pump low-temperature gas into the air inlet of the cooling box (102), characterized in that: Also includes: A first heat recovery component: two sets of heat-insulating shells (201) arranged at the air inlet and the air outlet of the zeolite rotor device (101), a plurality of heat exchange fins (204) being arranged inside the heat-insulating shells (201), and surfaces of the heat exchange fins (204) being respectively provided with supporting circular tubes (203) and protective circular sleeves (202), and the heat exchange fins (204) performing heat exchange with the VOC gas before concentration and performing heat exchange with the filtered gas discharged after the VOC gas is concentrated; A second heat recovery component: an air bag (301) arranged on one side of the zeolite rotor device (101) and heat exchangers (302) respectively arranged on the surfaces of two groups of heat-insulating shells (201), wherein the air bag (301) is used to store part of the relatively hot air discharged from the exhaust port of the cooling box (102) after heat exchange with the zeolite rotor in the cooling box (102), and cooperates with one of the heat exchangers (302) to make the temperature of the gas entering the air inlet of the desorption box (103) reach a set value, and the heat exchanger (302) is used to participate in the heat exchange of the liquid inside the heat exchange plate (204); Temperature control component: a plurality of small unit water tanks (401) are arranged on one side of the zeolite wheel device (101), a plurality of electric control valves (402) are installed on the surface of the small unit water tanks (401), the small unit water tanks (401) and the electric control valves (402) are connected to the heat exchange plate (204) and the inside of the heat exchanger (302) through pipelines, and mixed liquid heat exchange is performed through one of the small unit water tanks (401) to output liquid with a temperature reaching a set value; Cleaning component: a gas-liquid recovery hood (501) and a gas-liquid introduction hood (502) arranged inside the heat-insulating shell (201); a plurality of blocking rods (504) are arranged inside the gas-liquid introduction hood (502) and the gas-liquid recovery hood (501); a strip-shaped nozzle (503) is arranged inside the gas-liquid introduction hood (502); and the blocking rods (504) are used to block air gaps formed between adjacent heat exchange fins (204); The strip-shaped nozzle (503) is used to spray liquid to clean the heat exchange plate (204); the airflow is blown from the gas-liquid inlet cover (502) to the gas-liquid inlet cover (502) to blow out the liquid carrying dirt on the surface of the heat exchange plate (204) and to air-dry the liquid remaining on the surface of the heat exchange plate (204); the supporting circular tube (203) is rotatably connected to the through groove provided on the surface of the gas-liquid inlet cover (502) and the strip-shaped nozzle (503); a driven fan blade (505) is provided inside the heat-insulating outer shell (201); the driven fan blade (505) is used to drive the protective circular sleeve (202) to rotate; A supporting circular tube (203) is arranged inside the heat-insulating outer shell (201); through grooves matching the heat exchange fins (204) are provided on the surface of the supporting circular tube (203) near the two ends; the heat exchange fins (204) are fixedly connected to the corresponding through grooves on the surface of the supporting circular tube (203) via a water inlet and a water outlet protruding from the surface; the two ends of the supporting circular tube (203) are rotatably connected to connecting circular tubes (205) via a first bearing and a rotating sealing ring; a protective circular sleeve (202) is arranged on the outside of the supporting circular tube (203); the heat exchange fins (204) are arranged in an annular array inside the protective circular sleeve (202); the heat exchange fins (204) are fixedly connected to the protective circular sleeve (202); and the protective circular sleeve (202) is rotatably connected to the heat-insulating outer shell (201) via a second bearing; The surface of the airbag (301) is provided with a first circular plate (303) and a third circular plate (308); the surface of the first circular plate (303) is fixedly connected to a plurality of limiting circular rods (304) in an annular array; the third circular plate (308) is slidably connected to the limiting circular rods (304) via circular holes provided in an annular array on the surface; the end of the limiting circular rod (304) is fixedly connected to a second circular plate (305); the surface of the second circular plate (305) is installed with an electric push rod (306) ), the end of the output shaft of the electric push rod (306) passes through the surface of the second circular plate (305) and extends between the second circular plate (305) and the third circular plate (308), the end of the output shaft of the electric push rod (306) is fixedly connected to a push block (307), the air bag (301) is connected to the interior of one of the heat exchangers (302) through a pipeline, and the air outlet of the desorption box (103) is connected to the interior of the heat exchanger (302) through a pipeline; A liquid temperature sensor (403), a heater (404), a liquid mixing box (405) and a water pump (406) are arranged on one side of the small unit water tank (401); the liquid temperature sensor (403), the heater (404) and the liquid mixing box (405) are connected in sequence via pipelines; the liquid temperature sensor (403) is connected to one of the electric control valves (402) via a pipeline; and the water pump (406) is connected to the heat exchanger (302) arranged on the air inlet side of the zeolite wheel device (101) via a pipeline; The interior of the gas-liquid introduction hood (502) and the interior of the gas-liquid recovery hood (501) are symmetrically provided with arc blocks (508), the blocking rods (504) are respectively fixedly connected to the surfaces of the two arc blocks (508), the interior of the gas-liquid introduction hood (502) is provided with an air blowing groove (507), the four arc blocks (508) are respectively fixedly connected to the gas-liquid recovery hood (501) and the gas-liquid introduction hood (502), the gas-liquid recovery hood (501) and the gas-liquid introduction hood (502) are both fixedly connected to the heat-insulating outer shell (201), the supporting circular tube (203) is respectively connected to the two strip-shaped nozzles (503) through a pipeline, the air bag (301) is connected to the gas-liquid introduction hood (502) through a pipeline, and the surfaces of the gas-liquid recovery hood (501) and the gas-liquid introduction hood (502) are both in contact with the surface of the heat exchange plate (204); Two of the small unit water tanks (401) form a liquid mixing group, and the remaining plurality of the small unit water tanks (401) form a water supply group; The liquid mixing group comprises two electrically controlled valves (402) arranged between the two small unit water tanks (401), the electrically controlled valves (402) being connected to the inside of the two small unit water tanks (401) through two pipes respectively, one of the electrically controlled valves (402) being connected to one of the connecting circular pipes (205) arranged on one side of the air inlet of the zeolite rotor device (101) through a pipe, and the other electrically controlled valve (402) being connected to the liquid temperature sensor (403) through a pipe; The water supply group further comprises two liquid temperature sensors (403) arranged between the plurality of small unit water tanks (401); the two electrically controlled valves (402) are electrically controlled multi-way pipes; the water inlets of all the small unit water tanks (401) of the water supply group are connected to one of the electrically controlled valves (402) through a pipe; the water outlets of all the small unit water tanks (401) are connected to another electrically controlled valve (402) through a pipe; the electrically controlled valve (402) connected to the water inlet is connected to one of the heat exchangers (302) through a pipe; and the electrically controlled valve (402) connected to the water outlet is connected to the inside of one of the connecting circular pipes (205) through a pipe; The surfaces of the blocking rod (504) away from the arc-shaped block (508) are respectively fixedly connected with a toggle convex portion (509); the surface of the protective sleeve (202) is symmetrically provided with two groups of convex blocks (506); each group of convex blocks (506) is fixedly connected to the surface of the protective sleeve (202) in an annular array; annular grooves (510) are symmetrically provided on the surface of the supporting circular tube (203); the arc-shaped blocks (508) are respectively slidably connected to the supporting circular tube (203) via the annular grooves (510); and the driven blades (505) are fixedly connected to the surface of the supporting circular tube (203) in an annular array; The two sides of the heat exchange plate (204) are arranged as inclined surfaces, so that when the moving protrusion (509) slides over the surface of the protrusion (506) to drive the blocking rod (504) to undergo elastic deformation, the blocking rod (504) leaves the air gap formed corresponding to the heat exchange plate (204).

2. A method for using the device as claimed in claim 1, comprising the following steps: Step 1, the filtered VOC gas is introduced into the heat-insulating housing (201) on the air inlet side of the zeolite rotor device (101) and cooled to the adsorption temperature of the zeolite rotor device (101), and at the same time, part of the temperature of this part of the VOC gas is stored in the water tank of the mixing liquid group; Step 2: After the heat exchange in step 1, the liquid enters the corresponding small unit water tank (401) according to the set temperature, and then the liquid with a temperature lower than the set temperature enters the mixing tank (405) through the heater (404) to complete the temperature exchange. The heater (404) supplements the heating of the liquid entering the mixing tank (405); Step 3: After the cooling gas blown into the air inlet of the cooling box (102) passes through the zeolite rotor device (101) for heat exchange, a portion of the cooling gas is directed to the heat-insulating housing (201) on the air outlet side of the zeolite rotor device (101), and a portion of the cooling gas is directed to the air bag (301) for storage. When switching to the desorption process, the gas stored in the air bag (301) flows to the heat exchanger (302) on the air inlet side of the zeolite rotor device (101) for heating. At the same time, the liquid in the mixing box (405) in step 2 is also passed into the heat exchanger (302), and the gas heated to the set temperature is passed into the air inlet of the desorption box (103). The VOC gas after heat exchange is introduced into the heat exchanger (302) on the air outlet side of the zeolite rotor device (101); Step 4: The gas discharged from the air outlet of the zeolite rotor device (101) is passed into the heat-insulating housing (201) on the air outlet side of the zeolite rotor device (101) for cooling; the heat exchanger (302) arranged on the air inlet side of the zeolite rotor device (101) passes the liquid after heat exchange into one of the connecting circular tubes (205) on the air outlet side of the zeolite rotor device (101); and the other connecting circular tube (205) passes the cooled liquid into the heat exchanger (302) on the air outlet side of the zeolite rotor device (101). 02), the gas introduced into the heat exchanger (302) in step three is cooled, and the heat exchanger (302) then passes the heated liquid into one of the small unit water tanks (401) through the electric control valve (402) for static cooling, and another electric control valve (402) passes the liquid in one of the small unit water tanks (401) storing liquid at a suitable temperature into one of the connecting circular pipes (205) arranged on one side of the air inlet of the zeolite wheel device (101), so as to cool the VOC gas in step one.

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