A VOCs gas treatment system

Abstract

The present invention provides a VOCs gas treatment system, comprising a filter unit for preliminary filtering of VOCs gas, a zeolite unit for purifying the filtered VOCs gas, and a catalytic oxidation unit for catalytic oxidation treatment of the purified VOCs gas, wherein the filter unit, the zeolite unit and the catalytic oxidation unit are connected through a pipeline. The VOCs gas treatment system provided by the present invention can achieve full purification of VOCs gas, and has high purification efficiency and good safety.

Description

Technical Field

[0001] The present invention relates to the technical field of VOCs treatment, and more specifically, to a VOCs gas treatment system. Background Art

[0002] The electronics, semiconductor, petrochemical, coating and other industries produce a large amount of VOCs gases during industrial production. These gases are of various types, with different air volumes, concentrations and temperatures, so the treatment methods are also different.

[0003] At present, there are two mainstream treatment methods on the market for large air volume and low concentration of VOCs gas: the first is to use activated carbon adsorption; the second is to use zeolite wheel adsorption. However, for the first method, since activated carbon is only suitable for adsorbing VOCs gas with a boiling point of 70-150°C, the adsorption efficiency is low for other types of VOCs gas. The adsorption method using zeolite wheel is not suitable for intermittent production and emission of VOCs gas due to the high cost of zeolite wheel, the integral installation is not conducive to later partial replacement, and the method of adsorption and desorption at the same time. Summary of the invention

[0004] The object of the present invention is to provide a VOCs gas treatment system which can achieve sufficient purification of VOCs gas with high purification efficiency and good safety.

[0005] The present invention provides a VOCs gas treatment system, comprising a filter unit for preliminarily filtering VOCs gas, a zeolite unit for purifying the filtered VOCs gas, and a catalytic oxidation unit for catalytically oxidizing the purified VOCs gas. The filter unit, the zeolite unit and the catalytic oxidation unit are connected through a pipeline.

[0006] Preferably, the zeolite unit comprises at least three adsorption zeolite modules, one cooling zeolite module, and one desorption zeolite module; the bottoms of the adsorption zeolite module, the cooling zeolite module, and the desorption zeolite module are all provided with an adsorption cooling branch for connecting to the adsorption cooling main circuit and a first desorption branch for connecting to the desorption main circuit, and the tops of the zeolite modules are all provided with a standard emission branch for connecting to the first standard emission main circuit and a second desorption branch for connecting to the desorption main circuit, the adsorption cooling branch is diagonally arranged with the standard emission branch, and the first desorption branch is diagonally arranged with the second desorption branch; the adsorption cooling branch, the first desorption branch, the standard emission branch, and the second desorption branch are all installed with valves;

[0007] The desorption main circuit is equipped with the catalytic oxidation unit for decomposing VOCs gas and a first heater for heating the VOCs gas to a desorption temperature.

[0008] Preferably, the filter unit comprises a filter device and a first fan for supplying VOCs gas into the filter device, and the outlet end of the filter device is connected to the inlet end of the adsorption cooling main circuit.

[0009] Preferably, the catalytic oxidation unit includes a heat exchanger, a second heater for heating the VOCs gas, and a catalytic oxidation reactor for catalytically oxidizing the VOCs gas. The heat exchanger, the second heater and the catalytic oxidation reactor are connected by pipelines to form a circulating reaction loop; and also includes a second fan for providing VOCs gas to the heat exchanger.

[0010] Preferably, the filtering device is a three-layer filtering structure, including a stainless steel filter mesh, glass fiber filter cotton and activated carbon filter cotton.

[0011] Preferably, it also includes an ultraviolet irradiation lamp installed at the outlet end of the first emission standard main route.

[0012] Preferably, it also includes a first concentration detector and a second concentration detector which are respectively arranged on the left and right sides of the ultraviolet irradiation lamp, and the ultraviolet irradiation lamp, the first concentration detector, and the second concentration detector are all connected through a pipeline.

[0013] Preferably, the adsorption zeolite module, the cooling zeolite module and the desorption zeolite module are all provided with honeycomb-shaped ventilation holes inside.

[0014] Preferably, the adsorption zeolite module, the cooling zeolite module and the desorption zeolite module each comprise a plurality of zeolite block units, and the plurality of zeolite block units are spliced ​​horizontally and vertically;

[0015] The zeolite block unit includes a bottom layer splicing block, a fourth layer of cubic zeolite blocks, a third layer of cubic zeolite blocks, a second layer of cubic zeolite blocks, and a first layer of cubic zeolite blocks; the bottom layer splicing block is composed of four cubic zeolite blocks spliced ​​together, the fourth layer of cubic zeolite blocks is aligned with one of the cubic zeolite blocks in the bottom layer splicing block, and the third layer of cubic zeolite blocks, the second layer of cubic zeolite blocks, and the first layer of cubic zeolite blocks are arranged counterclockwise from bottom to top relative to the bottom layer splicing block.

[0016] Preferably, the adsorption zeolite module, the cooling zeolite module and the desorption zeolite module each comprise a plurality of zeolite block units, and the plurality of zeolite block units are spliced ​​horizontally and vertically;

[0017] The zeolite block unit includes a bottom layer splicing block, a fourth layer of cubic zeolite blocks, a third layer of cubic zeolite blocks, a second layer of cubic zeolite blocks, and a first layer of cubic zeolite blocks; the bottom layer splicing block is composed of four cubic zeolite blocks spliced ​​together, the fourth layer of cubic zeolite blocks is aligned with one of the cubic zeolite blocks in the bottom layer splicing block, and the third layer of cubic zeolite blocks, the second layer of cubic zeolite blocks, and the first layer of cubic zeolite blocks are arranged clockwise from bottom to top relative to the bottom layer splicing block.

[0018] Compared with the above background technology, the present invention provides a VOCs gas treatment system, including a filter unit, a zeolite unit and a catalytic oxidation unit. The VOCs gas is filtered through the filtering action of the filter unit to filter out large particulate matter, and then enters the zeolite unit through a delivery pipeline. The zeolite unit is made of a foam zeolite material with honeycomb pores prepared from natural zeolite powder as a raw material. When the VOCs gas flows through, the toxic substances inside it are adsorbed, thereby being purified; the purified VOCs gas enters the catalytic oxidation unit through a delivery pipeline and is finally photolyzed, thereby achieving full purification of the VOCs gas. Therefore, the VOCs gas treatment system provided by the present invention can achieve full purification of VOCs gas, and has high purification efficiency and good safety, thereby solving the problem of incomplete purification of VOCs gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the structure of the VOCs gas treatment system provided by the present invention;

[0021] Figure 2 A schematic diagram of the structure of the zeolite block unit provided by the present invention;

[0022] Figure 3 Reason Figure 2 Schematic diagram of the structure of the zeolite module composed of zeolite block units.

[0023] Among them, 1-adsorption cooling main circuit, 2-adsorption cooling branch, 3-desorption main circuit, 4-first desorption branch, 5-first standard emission main circuit, 6-standard emission branch, 7-second desorption branch, 8-valve, 9-first heater, 10-filter device, 11-first fan, 12-heat exchanger, 13-second heater, 14-catalytic oxidation reactor, 15-second fan, 16-ultraviolet irradiation lamp, 17-first concentration detector, 18-second concentration detector, 19-zeolite block unit, 191-bottom layer splicing block, 192-fourth layer cubic zeolite block, 193-third layer cubic zeolite block, 194-second layer cubic zeolite block, 195-first layer cubic zeolite block, 20-second standard emission main circuit. DETAILED DESCRIPTION

[0024] The core of the present invention is to provide a VOCs gas treatment system, which solves the problem of incomplete VOCs gas purification and has high purification efficiency and good safety.

[0025] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] Please refer to Figure 1 , Figure 2 and Figure 3 , Figure 1 This is a schematic diagram of the structure of the VOCs gas treatment system provided by the present invention; Figure 2 A schematic diagram of the structure of the zeolite block unit provided by the present invention; Figure 3 Reason Figure 2 Schematic diagram of the structure of the zeolite module composed of zeolite block units.

[0027] The present invention provides a VOCs gas treatment system, including a filter unit, a zeolite unit and a catalytic oxidation unit, wherein the filter unit, the zeolite unit and the catalytic oxidation unit are connected to form a circulation loop through a pipeline. The filter unit is used to perform preliminary filtration on the VOCs gas, and the zeolite unit is used to adsorb the VOCs gas after being filtered by the filter unit, thereby removing harmful substances in the VOCs gas, thereby achieving secondary purification of the VOCs gas; finally, the VOCs gas enters the catalytic oxidation unit through the transportation of the pipeline, and chemically reacts with the adsorbent inside it, thereby decomposing the VOCs gas, thereby achieving tertiary purification of the VOCs gas. It can be seen that the VOCs gas treatment system provided by the present invention circulates VOCs gas into the filter unit, the zeolite unit and the catalytic oxidation unit, and the VOCs gas is successively filtered by the filter unit, adsorbed and purified by the zeolite unit and chemically decomposed by the catalytic oxidation unit, thereby obtaining clean gas.

[0028] The above-mentioned zeolite unit includes at least three zeolite modules, and an adsorption cooling branch 2 and a first desorption branch 4 are installed at the bottom of any zeolite module. Preferably, the adsorption cooling branch 2 is arranged at the left end of the zeolite module, and the first desorption branch 4 is arranged at the right end of the zeolite module. In addition, a standard emission branch 6 and a second desorption branch 7 are installed on the top of any zeolite module. Preferably, the second desorption branch 7 is arranged on the left side of the top of the zeolite module, and the standard emission branch 6 is arranged on the right side of the top of the zeolite module. Regardless of the position, it needs to be ensured that the adsorption cooling branch 2 and the standard emission branch 6 are diagonally arranged, and similarly, the first desorption branch 4 and the second desorption branch 7 are diagonally arranged. Valves 8 are installed on the adsorption cooling branch 2, the first desorption branch 4, the standard emission branch 6 and the second desorption branch 7. A control circuit is also provided which is connected to the valve 8 via a wire. Under the control of the control circuit, the valve 8 on each branch can be opened or closed, thereby changing the gas flow direction to achieve conversion between adsorption, cooling and desorption modes, and can meet the needs of continuous emission and intermittent emission, thereby increasing the purification mode.

[0029] The adsorption cooling branch 2 and the first desorption branch 4 at the bottom of each zeolite module are respectively connected to the adsorption cooling main circuit 1 and the desorption main circuit 3, and the standard emission branch 6 and the second desorption branch 7 at the top of each zeolite module are respectively connected to the first standard emission main circuit 5 and the desorption main circuit 3. The VOCs gas enters the corresponding zeolite module through the adsorption cooling main circuit 1 and the adsorption cooling branch 2 with the valve 8 in the open state. Under the adsorption force of the zeolite, the harmful gases in the VOCs gas are removed, and the obtained standard gas is discharged to the outside of the device through the standard emission branch 6 and the first standard emission main circuit 5, thereby achieving the purification of the VOCs gas.

[0030] In a specific embodiment, the number of the zeolite modules is five, and the five zeolite modules are independent of each other and communicated with each other through pipelines. The five zeolite modules can simultaneously perform adsorption, desorption and cooling functions, or independently perform the three functions.

[0031] Specifically, when the five zeolite modules simultaneously complete the adsorption, desorption and cooling functions, the five zeolite modules are three adsorption zeolite modules, one cooling zeolite module and one desorption zeolite module, and the three adsorption zeolite modules, the cooling zeolite module and the desorption zeolite module are sequentially arranged along the gas flow direction, that is, along the Figure 1As shown, three adsorption zeolite modules are arranged in sequence from left to right for adsorption, wherein the standard emission branch 6 of two adsorption zeolite modules is opened, and the standard emission branch 6 of the other adsorption zeolite module is closed, thereby increasing the retention time of VOCs gas inside the adsorption zeolite module, so that the VOCs gas is fully in contact with the adsorption zeolite module. The zeolite module that closes the valve 8 can be any one of the three zeolite modules, preferably the last zeolite module, that is, Figure 1 The third zeolite module is shown.

[0032] When the device realizes continuous production, that is, when the three functions of adsorption, desorption and cooling of the zeolite module are carried out simultaneously, each zeolite module is independent of each other and connected through pipelines. Each zeolite module has the functions of adsorption, desorption and cooling. The control circuit stores the preset time and controls the opening and closing process of each valve 8 according to the preset time. At any time period, three adsorption zeolite modules are adsorbed, the desorption zeolite module is desorbed, and the last cooling zeolite module is cooled. Two of the three adsorption zeolite modules have valves 8 on the qualified emission branch 6 opened to discharge qualified gas, and valves 8 on the first desorption branch 4 and the second desorption branch 7 are closed to allow the exhaust gas to fully contact with the zeolite block to increase the retention time.

[0033] More specifically, under the control of the valve 8, the five zeolite modules can all perform adsorption, desorption and cooling processes. Since there are multiple combinations of opening and closing of the valve 8, the following one is taken as an example for explanation.

[0034] Figure 1 The three zeolite modules from left to right in the figure are adsorption zeolite modules, the fourth zeolite module is a cooling module, and the fifth zeolite module is a desorption module. The three adsorption zeolite modules adsorb simultaneously. At this time, the valves 8 on the first two adsorption cooling branches 2 and the standard emission branch 6 are all opened, the valve 8 on the adsorption cooling branch 2 of the third adsorption zeolite module is opened, the valve 8 on the standard emission branch 6 is closed, and the remaining valves 8 are closed to increase the retention time of the gas; at the same time, the adsorption cooling branch 2 and the second desorption branch 7 on the cooling zeolite module are opened, and the remaining valves 8 are closed to achieve cooling of the zeolite; the cooled gas is transported to the post-catalytic oxidation unit via the desorption main circuit 3 for catalytic oxidation treatment; at the same time, the valves 8 on the first desorption branch 4 and the second desorption branch 7 on the desorption zeolite module are opened, and the remaining valves 8 are closed, and the gas treated by desorption enters the catalytic oxidation unit for catalytic oxidation treatment.

[0035] When the device realizes intermittent production, that is, the three functions of adsorption, desorption and cooling of the zeolite module are performed separately, that is, the five zeolite modules perform adsorption, cooling or desorption at the same time.

[0036] When five zeolite modules perform adsorption action at the same time, all five zeolite modules are adsorption zeolite modules, among which the valves 8 on the adsorption cooling branch 2 and the standard emission branch 6 of four zeolite modules are opened, and the other valves 8 are closed; the adsorption cooling branch 2 of another zeolite module is opened, and the valves 8 on the standard emission branch 6 and other branches are closed to increase the residence time of the gas.

[0037] Similarly, when the five zeolite modules are cooled at the same time, the valves 8 on the adsorption cooling branch 2 and the second desorption branch 7 on the five zeolite modules are opened, and the valves 8 on the other branches are temporarily closed, and the gas enters the post-catalytic oxidation unit for catalytic oxidation treatment, and finally discharges qualified gas.

[0038] Similarly, when the five zeolite modules are desorbed at the same time, the valves 8 on the first desorption branch 4 and the second desorption branch 7 on the five zeolite modules are opened, and the valves 8 on the other branches are temporarily closed, and the gas enters the post-catalytic oxidation unit for catalytic oxidation treatment, and finally discharges qualified gas.

[0039] The above-mentioned catalytic oxidation unit and the first heater 9 for heating the VOCs gas to the desorption temperature are installed on the desorption main circuit 3. The second standard emission main circuit 20 is connected between the catalytic oxidation unit and the first standard emission main circuit 5. One end of the desorption main circuit 3 is connected to the second desorption branch 7 at the top of the zeolite module, and the other end is connected to the first desorption branch 4 at the bottom of the zeolite module. The above-mentioned first desorption branch 4 and second desorption branch 7 are connected to the desorption main circuit 3. In this way, when the corresponding valve 8 is opened, the VOCs gas entering the post-treatment system is decomposed, and a part of the VOCs gas is heated to the desorption temperature, for example, 50°C to 200°C, by the first heater 9, and enters the zeolite module from the bottom of the zeolite module in the open state of the valve 8 through the desorption main circuit 3 and the first desorption branches 4, and cooperates with the opening and closing of the corresponding valve 8 to achieve desorption of the zeolite module; the other part of the VOCs gas is discharged from the outside of the device through the second standard emission main circuit 20.

[0040] The filter unit includes a filter device 10 and a first fan 11. The first fan 11 is used to supply VOCs gas to the filter device 10. The outlet end of the filter device 10 is connected to the inlet end of the adsorption cooling main circuit 1. The filter device 10 can preliminarily filter large particle impurities in the exhaust gas. The preliminarily filtered exhaust gas enters each adsorption zeolite module through the adsorption cooling main circuit 1 and the adsorption cooling branch circuit 2.

[0041] Furthermore, the filter device 10 has a three-layer structure, the first layer is a stainless steel filter mesh, the second layer is glass fiber filter cotton, and the third layer is activated carbon filter cotton; the harmful gas in the exhaust gas is filtered through the stainless steel filter mesh, glass fiber filter cotton and activated carbon filter cotton in turn, thereby obtaining clean gas.

[0042] The above-mentioned catalytic oxidation unit includes a heat exchanger 12, a second heater 13 and a catalytic oxidation reactor 14. The heat exchanger 12 dissipates heat from the gas therein through the heat exchange principle to reduce the gas temperature; the second heater 13 heats up the cooled gas, and the gas entering the catalytic oxidation reactor 14 reacts chemically with the catalyst therein to further decompose and filter the exhaust gas. The heat exchanger 12, the second heater 13 and the catalytic oxidation reactor 14 are connected to form a circulating reaction loop through a pipeline, that is, the exhaust gas entering the heat exchanger 12 is cooled, heated and decomposed in turn, and then passes through the heat exchanger 12 again and is discharged from the pipeline. In this way, the circulating purification of the exhaust gas can be achieved. In addition, it also includes a second fan 15, which is installed between the heat exchanger 12 and the desorption main circuit 3 to continuously supply the gas to the heat exchanger 12, that is, the second fan 15 realizes the continuous input of gas into the circuit where the heat exchanger 12 is located.

[0043] In order to further improve the purification rate, an ultraviolet lamp 16 can be installed at the outlet end of the first standard emission main line 5. When the ultraviolet lamp 16 is turned on, it can further decompose harmful substances in the VOCs gas, thereby ensuring the purification efficiency of the gas.

[0044] In addition, a first concentration detector 17 and a second concentration detector 18 may be installed on the left and right sides of the ultraviolet lamp 16, respectively. The first concentration detector 17, the ultraviolet lamp 16 and the second concentration detector 18 are connected through pipelines. The first concentration detector 17 and the second concentration detector 18 are used to detect the concentration of gas before photolysis and the concentration of gas after photolysis, respectively, so as to compare the photolysis results and obtain the gas concentration value after photolysis.

[0045] The above-mentioned adsorption zeolite module, cooling zeolite module and desorption zeolite module are made of artificial zeolite using natural zeolite powder as raw material. The interior of the zeolite module has a honeycomb pore structure. By utilizing the adsorption properties of the zeolite material, harmful substances in the exhaust gas can be fully removed during contact with the exhaust gas. By switching the valve 8 and assisted by the first heater 9 and the second heater 13, the cooling of the cooling zeolite module and the desorption of the desorption zeolite module can be achieved.

[0046] Specifically, the above-mentioned adsorption zeolite module, cooling zeolite module and desorption zeolite module are each composed of multiple Figure 2The zeolite block unit 19 shown in the figure is composed of a plurality of zeolite block units 19, and each zeolite module is formed by horizontally and vertically splicing. Figure 3 As shown, the number of splicing and the splicing position are determined according to actual needs. The zeolite block unit 19 is composed of a bottom splicing block 191, a fourth layer of cubic zeolite blocks 192, a third layer of cubic zeolite blocks 193, a second layer of cubic zeolite blocks 194 and a first layer of cubic zeolite blocks 195, wherein the bottom splicing block 191 is a square block structure spliced ​​by four cubic zeolite blocks; the fourth layer of cubic zeolite blocks 192, the third layer of cubic zeolite blocks 193, the second layer of cubic zeolite blocks 194 and the first layer of cubic zeolite blocks 195 are all single cubic zeolite blocks, and the fourth layer of cubic zeolite blocks 192 are aligned with the bottom splicing block 191 In any one of the four cubic zeolite blocks, the third-layer cubic zeolite block 193 is arranged in the upper structure of the fourth-layer cubic zeolite block 192, the second-layer cubic zeolite block 194 is arranged in the upper structure of the third-layer cubic zeolite block 193, and the first-layer cubic zeolite block 195 is arranged in the upper structure of the second-layer cubic zeolite block 194, and the fourth-layer cubic zeolite block 192, the third-layer cubic zeolite block 193, the second-layer cubic zeolite block 194 and the first-layer cubic zeolite block 195 are arranged in a spiral staircase ascending in a counterclockwise direction and connected to form a structure as shown in FIG. Figure 3 The gas release groove spirally rises from bottom to top. This structure increases the contact area between the gas and the zeolite, and increases the retention time of the exhaust gas, so that the zeolite block is fully in contact with the exhaust gas, and the cyclic purification of the exhaust gas is achieved in the reciprocating cycle.

[0047] The above-mentioned layers of cubic zeolite blocks can also be arranged clockwise, that is, the fourth layer of cubic zeolite blocks 192 is aligned with any one of the four cubic zeolite blocks in the bottom splicing block 191, the third layer of cubic zeolite blocks 193 is arranged in the upper structure of the fourth layer of cubic zeolite blocks 192, the second layer of cubic zeolite blocks 194 is arranged in the upper structure of the third layer of cubic zeolite blocks 193, and the first layer of cubic zeolite blocks 195 is arranged in the upper structure of the second layer of cubic zeolite blocks 194, and the fourth layer of cubic zeolite blocks 192, the third layer of cubic zeolite blocks 193, the second layer of cubic zeolite blocks 194 and the first layer of cubic zeolite blocks 195 are distributed in a spiral staircase ascending in the clockwise direction. This distribution method can also achieve the effect of full contact with the exhaust gas.

[0048] The VOCs gas treatment system provided by the present invention is introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A VOCs gas treatment system, It is characterized in that It includes a filter unit for preliminary filtering of VOCs gas, a zeolite unit for purifying the filtered VOCs gas, and a catalytic oxidation unit for catalytically oxidizing the purified VOCs gas, wherein the filter unit, the zeolite unit and the catalytic oxidation unit are connected through a pipeline; The zeolite unit comprises a plurality of zeolite modules, the zeolite module comprises a plurality of zeolite block units (19), and the plurality of zeolite block units (19) are spliced ​​horizontally and vertically; The zeolite block unit (19) comprises a bottom layer splicing block (191), a fourth layer of cubic zeolite blocks (192), a third layer of cubic zeolite blocks (193), a second layer of cubic zeolite blocks (194), and a first layer of cubic zeolite blocks (195); the bottom layer splicing block (191) is a square block structure formed by splicing four cubic zeolite blocks, and the fourth layer of cubic zeolite blocks (192), the third layer of cubic zeolite blocks (193), the second layer of cubic zeolite blocks (194), and the first layer of cubic zeolite blocks (195) are all single cubic zeolite blocks; The fourth layer of cubic zeolite blocks (192) is aligned with any one of the four cubic zeolite blocks in the bottom layer splicing block (191), the third layer of cubic zeolite blocks (193) is arranged in the upper structure of the fourth layer of cubic zeolite blocks (192), the second layer of cubic zeolite blocks (194) is arranged in the upper structure of the third layer of cubic zeolite blocks (193), the first layer of cubic zeolite blocks (195) is arranged in the upper structure of the second layer of cubic zeolite blocks (194), and the fourth layer of cubic zeolite blocks (192), the third layer of cubic zeolite blocks (193), the second layer of cubic zeolite blocks (194) and the first layer of cubic zeolite blocks (195) are arranged in a spiral staircase ascending in a counterclockwise direction.

2. The VOCs gas treatment system according to claim 1, It is characterized in that The zeolite module is divided into an adsorption zeolite module, a cooling zeolite module and a desorption zeolite module. The zeolite unit comprises at least three adsorption zeolite modules, one cooling zeolite module and one desorption zeolite module. The bottoms of the adsorption zeolite module, the cooling zeolite module and the desorption zeolite module are all provided with an adsorption cooling branch (2) for connecting to the adsorption cooling main circuit (1) and a first desorption branch (4) for connecting to the desorption main circuit (3). The tops of the zeolite modules are all provided with a standard emission branch (6) for connecting to the first standard emission main circuit (5) and a second desorption branch (7) for connecting to the desorption main circuit (3). The adsorption cooling branch (2) and the standard emission branch (6) are arranged diagonally, and the first desorption branch (4) and the second desorption branch (7) are arranged diagonally. The adsorption cooling branch (2), the first desorption branch (4), the standard emission branch (6) and the second desorption branch (7) are all installed with valves (8). The desorption main circuit (3) is equipped with the catalytic oxidation unit for decomposing the VOCs gas and a first heater (9) for heating the VOCs gas to a desorption temperature.

3. The VOCs gas treatment system according to claim 2, It is characterized in that The filter unit comprises a filter device (10) and a first fan (11) for supplying VOCs gas into the filter device (10); the outlet end of the filter device (10) is connected to the inlet end of the adsorption cooling main circuit (1).

4. The VOCs gas treatment system according to claim 2, It is characterized in that The catalytic oxidation unit comprises a heat exchanger (12), a second heater (13) for heating VOCs gas, and a catalytic oxidation reactor (14) for performing a catalytic oxidation reaction on the VOCs gas; the heat exchanger (12), the second heater (13) and the catalytic oxidation reactor (14) are connected via a pipeline to form a circulating reaction loop; and also comprises a second fan (15) for supplying VOCs gas to the heat exchanger (12).

5. The VOCs gas treatment system according to claim 3, It is characterized in that The filter device is specifically a three-layer filter structure, including a stainless steel filter screen, glass fiber filter cotton and activated carbon filter cotton.

6. The VOCs gas treatment system according to claim 4, It is characterized in that It also includes an ultraviolet irradiation lamp (16) installed at the outlet end of the first standard-reaching discharge main path (5).

7. The VOCs gas treatment system according to claim 6, It is characterized in that It also comprises a first concentration detector (17) and a second concentration detector (18) which are respectively arranged on the left and right sides of the ultraviolet irradiation lamp (16); the ultraviolet irradiation lamp (16), the first concentration detector (17), and the second concentration detector (18) are all connected via a pipeline.

8. The VOCs gas treatment system according to claim 6, It is characterized in that The adsorption zeolite module, the cooling zeolite module and the desorption zeolite module are all provided with honeycomb-shaped ventilation holes inside.

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