CN214075787U - Waste gas treatment device capable of repeatedly adsorbing and repeatedly burning - Google Patents

Abstract

The utility model relates to the technical field of waste gas treatment, more specifically relates to a waste gas treatment device capable of repeatedly adsorbing and repeatedly burning, comprising a desorption position, an adsorption unit, a desorption component, a catalytic combustion component and a circulating conveying component for circulating the adsorption unit, wherein the desorption component is positioned at one side of the desorption position and is provided with an input end communicated with the other side of the desorption position through a first air pipe and an output end communicated with the desorption component through a second air pipe; the circulating conveying assembly can act on the adsorption unit to drive the adsorption unit to move to the desorption position. The utility model discloses a can adsorb exhaust treatment device who relapses burning repeatedly can realize adsorbing repeatedly and relapse the burning, adsorbs more fully, and the burning is more abundant, and can make full use of heat energy, equipment occupation space are little.

Description

Waste gas treatment device capable of repeatedly adsorbing and repeatedly burning

Technical Field

The utility model relates to an exhaust-gas treatment's technical field, more specifically relates to a can adsorb exhaust treatment device who burns repeatedly.

Background

With the increasing demand for atmospheric control and the stricter environmental regulations, the health problems of workshops polluted by volatile organic compounds and staff working in the polluted workshops are concerned, the demand for waste gas treatment devices is increasing, and the waste gas treatment by combustion is the most common method. At present, combustion methods comprise a heat accumulation combustion method, a direct combustion method and a catalytic combustion method, and the methods have respective defects: the heat accumulation combustion method has larger machine structure, higher temperature and higher manufacturing cost, and needs to be externally connected with a gas pipe; the direct combustion method has larger machine structure, higher temperature, external connection of a gas pipe and poorer heat energy utilization because of needing to add the refractory bricks; the catalytic combustion method has insufficient combustion and poor heat energy utilization.

Chinese patent CN210934352U discloses an adsorption and catalytic treatment system for VOC waste gas, which comprises a filtering device, a molecular sieve adsorption device, a desorption regeneration device and a catalytic combustion device, wherein the VOC waste gas is firstly adsorbed by the filtering device after entering the system, organic gas in the waste gas is adsorbed on the surface of the pore channel of the molecular sieve, and clean gas is discharged to a chimney; when the molecular sieve adsorption device is saturated, introducing a regeneration gas into the molecular sieve adsorption device by using a desorption regeneration device, and desorbing VOC molecules adsorbed in the molecular sieve to form a high-concentration desorption gas; and the desorbed gas enters a catalytic combustion device for oxidation treatment to obtain oxidized gas, and the oxidized gas exchanges heat with newly-fed regenerated gas and is discharged. Although the scheme adopts the combined process of molecular sieve adsorption, hot air desorption regeneration and catalytic combustion to treat the VOC waste gas, the scheme is influenced by the waste gas adsorption efficiency under the condition of not repeatedly adsorbing and repeatedly combusting and after the heat exchange between the oxidizing gas and the newly-fed regenerated gas, the discharged oxidizing gas still contains waste gas with higher content, and the waste gas treatment effect is limited.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome not enough among the prior art, provide a can adsorb exhaust treatment device who burns repeatedly, can adsorb repeatedly, burn repeatedly VOC waste gas, adsorb more fully, need not external gas pipe, the burning is abundant, heat energy utilization is abundant.

In order to solve the technical problem, the utility model discloses a technical scheme is:

the utility model provides a waste gas treatment device capable of repeatedly adsorbing and burning, which comprises a desorption position, an adsorption unit, a desorption component, a catalytic combustion component and a circulating conveying component for circulating the adsorption unit, wherein the desorption component is positioned at one side of the desorption position, and the catalytic combustion component is provided with an input end communicated with the other side of the desorption position through a first air pipe and an output end communicated with the desorption component through a second air pipe; the circulating conveying assembly can act on the adsorption unit to drive the adsorption unit to move to the desorption position.

The utility model discloses a can adsorb waste gas treatment device who burns repeatedly, the multiunit adsorbs the unit circulation and adsorbs, move to desorption position and carry out the VOC desorption under the effect of circulation transport assembly after adsorbing the saturation of unit, the desorption changes down a set of absorption unit and carries out the desorption after setting for the time, under the effect of desorption subassembly, the desorption gas is obtained in the desorption of the adsorbed VOC molecule desorption of absorption unit, the desorption gas gets into the catalytic combustion subassembly and carries out the catalytic combustion decomposition and obtain the oxidizing gas that carbon dioxide and water are constituteed, the waste heat of oxidizing gas and the heat that the desorption subassembly produced are used for the VOC desorption jointly, make full use of heat energy, so circulate, realize that repeated absorption and repeated combustion, it is more abundant to adsorb, the burning is more abundant, and can make full use of heat energy, equipment occupation space is little.

Furthermore, the adsorption unit comprises a plurality of groups of screen plates, a cavity for filling a solid adsorption medium is arranged between every two adjacent screen plates, and the solid adsorption medium is selected from one of molecular sieves, activated carbon, silica gel and activated alumina.

Further, the desorption assembly comprises a mounting seat and a plurality of groups of first heating pipes arranged in the mounting seat, and the plurality of groups of first heating pipes are arranged in parallel.

Furthermore, the desorption position and the adsorption unit are both box-shaped structures, and the desorption position is close to one side of the adsorption unit.

Furthermore, an air inlet and outlet assembly for introducing air containing VOC is arranged below the catalytic combustion assembly in a communicating mode.

Furthermore, business turn over wind subassembly includes first casing and the inside wind-guiding baffle of first casing is located to the multiunit, is formed with the wind channel by the air inlet of lateral part by the air-out of top between the multiunit wind-guiding baffle.

Furthermore, the air guide partition plates comprise a plurality of groups of first air guide partition plates and a plurality of groups of second air guide partition plates, and the first air guide partition plates and the second air guide partition plates are alternately and regularly arranged in the first shell.

Further, catalytic combustion subassembly includes second casing, second heating tube and puts the catalyst shelf of catalyst piece, the catalyst shelf is located in the second casing, and multiunit second heating tube encircles the setting along second shells inner wall.

Furthermore, a first partition plate and a second partition plate which are perpendicular to the air guide partition plate are arranged in the second shell, the catalyst shelves are arranged between the first partition plate and the second partition plate in parallel, the first partition plate is provided with a first air inlet which is located above the top catalyst shelf, and the second partition plate is provided with a second air inlet which is located above the top catalyst shelf.

Further, the periphery parcel of first tuber pipe, second tuber pipe, desorption subassembly, catalytic combustion subassembly has thermal-insulated cotton.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a can adsorb exhaust treatment device who relapses burning repeatedly can realize adsorbing repeatedly and relapse the burning, adsorbs more fully, and the burning is more abundant, and can make full use of heat energy, equipment occupation space are little.

Drawings

FIG. 1 is a schematic structural diagram of a waste gas treatment device capable of repeatedly adsorbing and repeatedly burning;

FIG. 2 is a schematic structural view of a catalytic combustion assembly and an air inlet and outlet assembly;

fig. 3 is a schematic structural view of the first air guiding partition plate;

fig. 4 is a schematic structural view of a second air guiding partition plate;

FIG. 5 is a schematic view of gas flow in the air intake and outlet assembly and the catalytic combustion assembly;

in the drawings: 1-desorption position; 2-an adsorption unit; 21-mesh plate; 3-a desorption assembly; 31-a mounting seat; 32-a first heat-generating tube; 4-a catalytic combustion assembly; 41-a second housing; 42-a second heating tube; 43-a catalyst shelf; 44-a first divider plate; 45-a second divider panel; 46-first tuyere; 47-second tuyere; 5-a first air duct; 6-a second air duct; 7-a draught fan; 8-air inlet and outlet components; 81-a first air guiding clapboard; 811-a first frame; 812-a first separator; 813-second spacer; 814-a first air intake; 815-a first air outlet; 82-a second air guiding clapboard; 821-a second frame; 822-a third separator; 823-fourth separator; 824-a second air inlet; 825-a second air outlet.

Detailed Description

The present invention will be further described with reference to the following embodiments. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limitations of the present patent, and those skilled in the art can understand the specific meanings of the terms according to specific situations.

Examples

Fig. 1 to 5 show an embodiment of the exhaust gas treatment device capable of repeatedly adsorbing and repeatedly burning of the present invention, which includes a desorption position 1, an adsorption unit 2, a desorption component 3, a catalytic combustion component 4 and a circulating conveying component for circulating the adsorption unit 2, wherein the desorption component 3 is located at one side of the desorption position 1, the catalytic combustion component 4 is provided with an input end communicated with the other side of the desorption position 1 through a first air pipe 5 and an output end communicated with the desorption component 3 through a second air pipe 6; the circulating conveying assembly can act on the adsorption unit 2 to drive the adsorption unit 2 to move to the desorption position 1.

The utility model discloses when implementing, the multiunit adsorbs 2 circulation of unit adsorbs, move to desorption position 1 and carry out the VOC desorption after adsorbing unit 2 adsorption saturation under the effect of circulation transport assembly, the desorption is changed down a set of absorption unit 2 and is carried out the desorption after setting for the time, under desorption subassembly 3's effect, the desorption of the adsorbed VOC molecule of adsorption unit 2 comes out and is obtained the desorption gas, the desorption gas gets into catalytic combustion subassembly 4 and carries out the catalytic combustion decomposition and obtain the oxidizing gas that carbon dioxide and water are constituteed, the waste heat of oxidizing gas and the heat that desorption subassembly 3 produced are used for the VOC desorption jointly, make full use of heat energy, so circulate, realize that repeated absorption and repeated combustion, it is more abundant to adsorb, the burning is more abundant, and can make full use of heat energy, equipment occupation space is little. The embodiment is suitable for waste gas treatment in various occasions, in particular for waste gas treatment in a closed space.

In one embodiment, an induced draft fan 7 is provided at the connection between the catalytic combustion assembly 4 and the first duct 5 to facilitate the circulation of the gas within the first duct 5 and the second duct 6. In this embodiment, a set of induced draft fan 7 may also be disposed at the second air duct 6 or at the connection between the catalytic combustion assembly 4 and the second air duct 6.

In one embodiment, the adsorption unit 2 includes a plurality of sets of mesh plates 21, and a cavity for filling a solid adsorption medium is disposed between adjacent mesh plates 21, and the solid adsorption medium is selected from one of molecular sieves, activated carbon, silica gel, and activated alumina, as shown in fig. 1. The screen plate 21 is used for fixing a solid adsorption medium, and the size of a through hole arranged on the screen plate 21 is required to be smaller than that of the solid adsorption medium so as to prevent leakage; solid adsorption media can fully adsorb the VOC molecule in the air, and the adsorption efficiency of various commercially available adsorbing materials single absorption is mostly less than 30%, and this embodiment adopts the circulation conveying subassembly to circulate adsorption unit 2, can realize adsorbing repeatedly and burning repeatedly of VOC waste gas to improve the treatment effeciency of VOC waste gas.

In one embodiment, the circulating conveyor assembly may be an endless conveyor belt, and the multiple groups of adsorption units 2 are placed on the endless conveyor belt to circulate, and the endless conveyor belt passes through the desorption position 1; in this way, the adsorption unit 2 located at a position outside the desorption position 1 adsorbs the VOC, and the adsorption unit 2 located at the desorption position 1 desorbs the VOC under the action of the desorption assembly 3 to obtain desorption gas; after the desorption was accomplished, endless conveyor belt carried next adsorption unit 2 to desorption position 1, and the adsorption unit 2 that the desorption was accomplished adsorbs the VOC molecule once more, so circulation is reciprocal, can realize adsorbing repeatedly and burning repeatedly of VOC waste gas. Of course, it should be noted that the circulation conveying assembly of this embodiment is not limited to the endless conveyor belt, and other conveying assemblies that can realize the circulation conveying of the adsorption unit 2 and can continuously pass through the desorption position 1 are all applicable to the utility model discloses.

In one embodiment, the desorption assembly 3 includes a mounting seat 31 and a plurality of sets of first heat-generating pipes 32 installed in the mounting seat 31, and the plurality of sets of first heat-generating pipes 32 are arranged in parallel. The first heating pipe 32 heats the gas in the mounting seat 31 as a desorption heat source of the desorption position 1, the gas discharged from the catalytic combustion assembly 4 is used as another desorption heat source of the desorption position 1, and the energy required by heating the first heating pipe 32 to the desorption temperature can be saved.

In one embodiment, the desorption position 1 and the adsorption unit 2 are both box-shaped structures, and the desorption position 1 is adjacent to one side of the adsorption unit 2. The box structure may be a square box structure, but the square box structure is preferred for simple structure and beautiful appearance, and is not intended as a limiting rule of the present invention.

In one embodiment, an air inlet and outlet assembly 8 for introducing air containing VOC is installed below the catalytic combustion assembly 4 in a communicating manner, the first air pipe 5 or the induced draft fan 7 is communicated with the air inlet and outlet assembly 8, and the second air pipe 6 is also communicated with the air inlet and outlet assembly 8, as shown in fig. 2. In this embodiment, the air inlet and outlet assembly 8 may be used to introduce the desorption gas from the adsorption unit 2, and may also be used to introduce the air containing the VOC exhaust gas in the enclosed space. Specifically, the air inlet and outlet assembly 8 comprises a first shell and a plurality of groups of air guide partition plates arranged in the first shell, and an air channel for air inlet from the side part and air outlet from the top part is formed among the plurality of groups of air guide partition plates; under the guide of the air duct, the inlet air enters from one side of the air inlet and outlet assembly 8, the oxidizing gas obtained by catalytic combustion can flow out from the top and can also be guided out from the side, and accordingly the connecting position of the second air duct 6 and the air inlet and outlet assembly 8 is changed.

In one embodiment, the air guiding partition plates include multiple sets of first air guiding partition plates 81 and multiple sets of second air guiding partition plates 82, and the first air guiding partition plates 81 and the second air guiding partition plates 82 are alternately and regularly arranged in the first casing. Specifically, the first air guiding partition 81 includes a first frame 811, a first partition 812 and a second partition 813, a first air inlet 814 is disposed at the bottom of the first frame 811, the first partition 812 and the second partition 813 are installed in the first frame 811 in parallel and in a staggered manner, the first partition 812 is installed beside the first air inlet 814, and a first air outlet 815 is disposed at each of two sides of the top of the first frame 811, so that desorbed gas enters the catalytic combustion assembly 4 from the first air inlet 814 through the first air duct 5, bends and turns around, and then enters the catalytic combustion assembly 4 through the first air outlet 815, as shown in fig. 3; the second air guiding partition 82 includes a second frame 821, a third partition 822, and a fourth partition 823 which have the same size as the first frame 811, a second air inlet 824 is disposed at the top of the second frame 821, a second air outlet 825 is disposed at the bottom of the second frame 821, a projection of the second air inlet 824 is located between projections of the two sets of first air inlets 814, the second air outlet 825 and the first air inlet 814 are located on two opposite sides, the third partition 822 and the fourth partition 823 are installed in the second frame 821 in a parallel and staggered manner, and the fourth partition 823 is installed beside the second air outlet 825, so that the oxidation gas generated by catalytic combustion enters the second air inlet 824, bends and turns around, and then enters the second air duct 6 through the second air outlet 825, as shown in fig. 4.

In one embodiment, the catalytic combustion assembly 4 includes a second casing 41, a second heat generating pipe 42 and a catalyst shelf 43 with catalyst blocks, the catalyst shelf 43 is disposed in the second casing 41, and a plurality of sets of the second heat generating pipes 42 are disposed around the inner wall of the second casing 41, as shown in fig. 2 and 5. In the second casing 41, the second heating tube 42 is heated to 350-400 ℃, and the gas is catalytically combusted and decomposed into carbon dioxide and water under the combined action of high temperature and the catalyst.

In one embodiment, a first partition plate 44 and a second partition plate 45 perpendicular to the air guide partition plate are arranged in the second casing 41, a plurality of catalyst shelves 43 are arranged between the first partition plate 44 and the second partition plate 45 in parallel, the first partition plate 44 is provided with a first air opening 46 positioned above the top catalyst shelf 43, and the second partition plate 45 is provided with a second air opening 47 positioned above the top catalyst shelf 43. Specifically, the distance between the first partition plate 44 and the inner wall of the housing and the distance between the second partition plate 45 and the inner wall of the housing are the same as the width of the first air outlet 815, so as to better distinguish an air inlet path and an air outlet path, and ensure the efficiency of catalytic combustion.

In one embodiment, the first heat-generating pipe 32 operates to control the desorption temperature to be 200-270 ℃, and the second heat-generating pipe 42 operates to control the catalytic combustion temperature to be 350-400 ℃. The desorption temperature can meet the desorption requirement of VOC molecules, and a first temperature sensor can be adopted to monitor the desorption temperature; the catalytic combustion temperature is controlled according to the combustion requirement of VOC molecules, a second temperature sensor can be adopted to monitor the catalytic combustion temperature, and the monitored temperature is fed back in real time to control the working temperature of the first heating pipe 32 and the second heating pipe 42.

In one embodiment, the peripheries of the first air duct 5, the second air duct 6, the desorption assembly 3 and the catalytic combustion assembly 4 are wrapped with heat insulation cotton. The setting of thermal-insulated cotton is the preferred of making in order to prevent that the heat scatters and disappears to produce the influence to the environment, and other thermal-insulated subassemblies that can prevent the heat to scatter and disappear also can be applicable to the utility model discloses.

In the detailed description of the embodiments, various technical features may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. The waste gas treatment device capable of repeatedly adsorbing and repeatedly combusting is characterized by comprising a desorption position (1), an adsorption unit (2), a desorption assembly (3), a catalytic combustion assembly (4) and a circulating conveying assembly for circulating the adsorption unit (2), wherein the desorption assembly (3) is positioned on one side of the desorption position (1), and the catalytic combustion assembly (4) is provided with an input end communicated with the other side of the desorption position (1) through a first air pipe (5) and an output end communicated with the desorption assembly (3) through a second air pipe (6); the circulating conveying assembly can act on the adsorption unit (2) to drive the adsorption unit (2) to move to the desorption position (1).

2. The exhaust gas treatment device capable of repeatedly adsorbing and combusting and according to claim 1, wherein the adsorption unit (2) comprises a plurality of groups of screen plates (21), and a cavity for filling a solid adsorption medium is arranged between adjacent screen plates (21), and the solid adsorption medium is selected from one of molecular sieve, activated carbon, silica gel and activated alumina.

3. The exhaust gas treatment device capable of repeatedly adsorbing and combusting and according to claim 1, wherein the desorption assembly (3) comprises a mounting seat (31) and a plurality of groups of first heating pipes (32) arranged in the mounting seat (31), and the plurality of groups of first heating pipes (32) are arranged in parallel.

4. The exhaust gas treatment device capable of repeatedly adsorbing and combusting as claimed in claim 3, wherein the desorption position (1) and the adsorption unit (2) are both box-type structures, and the desorption position (1) is adjacent to one side of the adsorption unit (2).

5. The exhaust gas treatment device capable of repeatedly adsorbing and combusting as claimed in any one of claims 1 to 4, wherein an air inlet and outlet component (8) for introducing air containing VOC is arranged below the catalytic combustion component (4) in a communication manner.

6. The exhaust gas treatment device capable of repeatedly adsorbing and burning according to claim 5, wherein the air inlet and outlet assembly (8) comprises a first housing and a plurality of sets of air guide partition plates arranged in the first housing, and an air duct for allowing air to enter from a side part and to exit from a top part is formed between the plurality of sets of air guide partition plates.

7. The exhaust gas treatment device capable of repeated adsorption and repeated combustion as set forth in claim 6, wherein the air guiding partition plates include a plurality of sets of first air guiding partition plates (81) and a plurality of sets of second air guiding partition plates (82), and the first air guiding partition plates (81) and the second air guiding partition plates (82) are alternately and regularly arranged in the first casing.

8. The exhaust gas treatment device capable of repeatedly adsorbing and combusting and according to claim 6, wherein the catalytic combustion assembly (4) comprises a second casing (41), a second heating pipe (42) and a catalyst shelf (43) provided with catalyst blocks, the catalyst shelf (43) is arranged in the second casing (41), and a plurality of groups of second heating pipes (42) are arranged around the inner wall of the second casing (41).

9. The exhaust gas treatment device capable of repeatedly adsorbing and burning according to claim 8, wherein the second housing (41) is provided with a first partition plate and a second partition plate perpendicular to the air guide partition plate, a plurality of catalyst shelves (43) are arranged in parallel between the first partition plate and the second partition plate, the first partition plate is provided with a first air inlet positioned above the top catalyst shelf (43), and the second partition plate is provided with a second air inlet positioned above the top catalyst shelf (43).

10. The exhaust gas treatment device capable of repeatedly adsorbing and combusting as claimed in claim 1, wherein the peripheries of the first air duct (5), the second air duct (6), the desorption assembly (3) and the catalytic combustion assembly (4) are wrapped with heat insulation cotton.

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