Catalytic oxidation device and waste gas treatment equipment

Abstract

The utility model relates to a catalytic oxidation device and waste gas treatment equipment, and relates to the field of waste gas treatment equipment. The utility model provides a catalytic oxidation device. The catalytic oxidation device comprises a heat exchanger, a discharge outlet, an activated carbon adsorption device, a heating assembly and a catalytic reaction device, the heat exchanger comprises a first air inlet, a first air outlet, a second air inlet and a second air outlet, the air inlet end of the activated carbon adsorption device is communicated with the first air inlet, the first air outlet is communicated with the air inlet end of the heating assembly, the air outlet end of the heating assembly is communicated with the air inlet end of the catalytic reaction device, the air outlet end of the catalytic reaction device is communicated with the second air inlet, and the second air outlet is communicated with the air outlet end of the activated carbon adsorption device. By arranging the heat exchanger, the clean gas with heat energy enters the heat exchanger to perform cold and heat exchange with the organic waste gas, the temperature of the heating assembly for secondary heating of the waste gas is reduced, energy consumption resources are reduced, and the exhaust temperature of the clean gas is reduced.

Description

Technical Field

[0001] The utility model relates to the field of waste gas treatment equipment, in particular to a catalytic oxidation device and waste gas treatment equipment. Background Art

[0002] At present, activated carbon adsorption and CO catalytic oxidation processes can be used to purify organic waste gas generated by coating. In this purification process, activated carbon adsorbs organic waste gas, and after a period of time, when the activated carbon reaches a saturated state, the adsorption stops, and the organic matter has been concentrated in the activated carbon. Finally, the saturated activated carbon is desorbed and regenerated by catalytic oxidation device and catalytic combustion, and then the desorbed activated carbon is put back into use.

[0003] The inventors have found through research that the existing catalytic oxidation device consumes a lot of energy during the desorption and regeneration of saturated activated carbon, and the exhaust temperature of the purified gas is high. Utility Model Content

[0004] The utility model aims to provide a catalytic oxidation device and exhaust gas treatment equipment, which can reduce heat loss and energy consumption resources and lower the discharge temperature of clean gas.

[0005] The embodiment of the utility model is achieved as follows:

[0006] In the first aspect, the utility model provides a catalytic oxidation device, comprising a heat exchanger, an exhaust port, and a connected activated carbon adsorption device, a heating component and a catalytic reaction device; the heat exchanger comprises a first air inlet and a first air outlet and a second air inlet and a second air outlet, which are respectively connected; the air inlet end of the activated carbon adsorption device is connected to the first air inlet, the first air outlet is connected to the air inlet end of the heating component, the air outlet end of the heating component is connected to the air inlet end of the catalytic reaction device, the air outlet end of the catalytic reaction device is connected to the second air inlet, and the second air outlet is connected to the air outlet end of the activated carbon adsorption device; the exhaust port is connected to the second air outlet.

[0007] Optionally, the catalytic oxidation device further comprises a first fan, an air inlet end of the first fan is connected to an air inlet end of the activated carbon adsorption device, and an air outlet end of the first fan is connected to the first air inlet.

[0008] Optionally, the catalytic oxidation device further comprises a supplementary cooling fan for cooling the activated carbon adsorption device, and an air outlet end of the supplementary cooling fan is connected to an air outlet end of the activated carbon adsorption device;

[0009] A supplementary cooling air valve is provided at the air outlet end of the supplementary cooling air fan.

[0010] Optionally, the catalytic oxidation device further comprises a flame arrester, wherein the air inlet end of the flame arrester is communicated with the second air outlet, and the air outlet end of the flame arrester is communicated with the air outlet end of the activated carbon adsorption device.

[0011] Optionally, a discharge flow valve is provided between the discharge port and the second air outlet.

[0012] Optionally, a first temperature sensor is provided in a pipeline connecting the first air outlet and the air inlet end of the heating component.

[0013] Optionally, a second temperature sensor and a third temperature sensor are provided in the catalytic reaction device, the second temperature sensor is arranged at the air inlet end of the catalytic reaction device, and the third temperature sensor is arranged at the air outlet end of the catalytic reaction device.

[0014] Optionally, the first temperature sensor, the third temperature sensor and the motor of the heating assembly are electrically connected.

[0015] Optionally, a third pressure sensor is provided in the catalytic reaction device.

[0016] In a second aspect, the utility model provides an exhaust gas treatment device, comprising a catalytic oxidation device as described in any one of the above items, wherein the air inlet end of the activated carbon adsorption device is used to introduce exhaust gas, and the air outlet end of the activated carbon adsorption device is connected to the exhaust port.

[0017] The beneficial effects of the embodiments of the utility model are:

[0018] The catalytic oxidation device proposed in the utility model is equipped with a heat exchanger so that the clean gas with thermal energy enters the heat exchanger to exchange heat with the organic waste gas, replaces the thermal energy, realizes the first temperature increase of the organic waste gas released by desorption, reduces the temperature of the second heating of the organic waste gas by the heating component, effectively reduces the heat loss and energy consumption resources, and also reduces the discharge temperature of the clean gas after purification.

[0019] Furthermore, when the organic matter concentration of the organic waste gas reaches a certain value, the heat exchanger can ensure that the equipment can operate normally under no operating power or low power conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a schematic diagram of a catalytic oxidation device according to an embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of an activated carbon adsorption device according to an embodiment of the utility model;

[0023] Figure 3 This is a schematic diagram of an activated carbon adsorption device according to an embodiment of the utility model for adsorbing waste gas;

[0024] Figure 4 This is a schematic diagram of the structure of a heat exchanger according to an embodiment of the utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the catalytic reaction device of the utility model embodiment;

[0026] Figure 6 This is a schematic diagram of an exhaust gas treatment device according to an embodiment of the present utility model.

[0027] Icons: 010-waste gas treatment equipment; 11-first adsorption air valve; 12-filter device; 121-first pressure sensor; 122-second pressure sensor; 123-differential pressure transmitter; 13-activated carbon adsorption device; 131-adsorption device body; 132-intake pipe structure; 133-outlet pipe structure; 134-first activated carbon filter unit; 135-second activated carbon filter unit; 136-first baffle; 137-second baffle; 138-third baffle; 14-second adsorption air valve; 15-adsorption fan; 16-discharge pipe; 161-discharge port; 17-first fan; 18-first concentration sensor; 19-heat exchanger; 19 1-first air inlet; 192-first air outlet; 193-second air inlet; 194-second air outlet; 195-exchange box; 196-heat exchange tube; 20-first temperature sensor; 21-heating assembly; 22-catalytic reaction device; 221-reaction chamber body; 222-first stage catalytic fixed bed; 223-second stage catalytic fixed bed; 224-second temperature sensor; 225-third temperature sensor; 226-third pressure sensor; 23-fourth temperature sensor; 24-second concentration sensor; 25-discharge flow valve; 26-desorption air valve; 27-flame arrester; 28-fifth temperature sensor; 29-supplementary cooling fan; 30-supplementary cooling air valve. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0032] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] At present, in the spraying waste gas treatment project of automobile sheet metal, the pollutants in the project are mainly waste gas generated during the painting process and waste gas overflowed during the drying process of the workpiece, and the main pollutants are VOCs gases such as benzene, toluene, xylene, butyl ester, and sec-butyl ester. Through the analysis and comparison of conventional organic waste gas purification processes, it is found that the main characteristics of spraying waste gas are as follows: fixed source; contains a large amount of dust particles; intermittent operation, low continuity; low waste gas concentration; complex composition.

[0035] Combined with the company's actual use and needs, and referring to the technical guidelines for volatile organic compound control and waste gas composition parameters, the project uses activated carbon adsorption and CO catalytic oxidation processes for the purification process of coating organic waste gas. In this purification process, activated carbon adsorbs organic waste gas, and after a period of time, when the activated carbon reaches a saturated state, the adsorption stops, and the organic matter has been concentrated in the activated carbon. Finally, the saturated activated carbon is desorbed and regenerated through a catalytic oxidation device and catalytic combustion, and then the desorbed activated carbon is put back into use.

[0036] The inventors have found through research that the existing catalytic oxidation device consumes a lot of energy during the desorption and regeneration of saturated activated carbon, and the exhaust temperature of the purified gas is high.

[0037] Therefore, the utility model proposes an exhaust gas treatment device 010, which is used in the spraying exhaust gas treatment project for automobile body spraying, and can effectively reduce the overall heat loss and energy consumption resources of the equipment, while also reducing the exhaust temperature of the clean gas after purification.

[0038] Please refer to Figure 6 The utility model proposes an exhaust gas treatment device 010, which includes a catalytic oxidation device, an air inlet end of an activated carbon adsorption device 13 for introducing exhaust gas, and an air outlet end of the activated carbon adsorption device 13 is connected to an exhaust port 161.

[0039] In this embodiment, the exhaust gas treatment equipment 010 includes a catalytic oxidation device.

[0040] Please refer to Figure 1The present embodiment provides a catalytic oxidation device, comprising a heat exchanger 19, an exhaust port 161, and an activated carbon adsorption device 13, a heating component 21, and a catalytic reaction device 22 connected thereto; the heat exchanger 19 comprises a first air inlet 191 and a first air outlet 192, and a second air inlet 193 and a second air outlet 194, which are connected thereto respectively; the air inlet end of the activated carbon adsorption device 13 is connected to the first air inlet 191, the first air outlet 192 is connected to the air inlet end of the heating component 21, the air outlet end of the heating component 21 is connected to the air inlet end of the catalytic reaction device 22, the air outlet end of the catalytic reaction device 22 is connected to the second air inlet 193, and the second air outlet 194 is connected to the air outlet end of the activated carbon adsorption device 13; the exhaust port 161 is connected to the second air outlet 194.

[0041] Among them, when the activated carbon in the activated carbon adsorption device 13 reaches a saturated state, the activated carbon is heated to a certain temperature to desorb the organic matter adsorbed by the activated carbon and release the organic waste gas; the heating component 21 is used to heat the organic waste gas to reach the required temperature for the catalytic reaction; the catalytic reaction device 22 is used to decompose the organic waste gas into a clean gas with thermal energy.

[0042] It can be understood that by setting up the heat exchanger 19, the clean gas with heat energy enters the heat exchanger 19 to exchange heat with the organic waste gas, replace heat energy, and achieve the first temperature increase of the organic waste gas released by desorption, reduce the temperature of the second heating of the organic waste gas by the heating component 21, effectively reduce heat loss and energy consumption resources, and also reduce the discharge temperature of the clean gas after purification. And when the organic matter concentration of the organic waste gas reaches a certain value, the heat exchanger 19 can ensure the normal operation of the equipment under no operating power or low power.

[0043] Please refer to Figure 6 In this embodiment, the exhaust gas treatment equipment 010 includes a filtering device 12 .

[0044] The air inlet end of the filter device 12 is used to introduce exhaust gas, the air outlet end of the filter device 12 is connected to the air inlet end of the first adsorption air valve 11, and the air outlet end of the first adsorption air valve 11 is connected to the air inlet end of the activated carbon adsorption device 13.

[0045] It is understandable that, since there are impurities such as paint mist, particulate matter, and dust in the exhaust gas, the filter device 12 is provided to prevent the impurities in the exhaust gas from entering the activated carbon adsorption device 13, and at the same time ensure that the cleanliness of the air source of the activated carbon adsorption device 13 is ≥99% and the humidity is ≤80%. Among them, the filter device 12 can use a dry dust collector, which is a purification device that separates and captures solid and liquid particles in the gas through a porous filter medium (filter material).

[0046] In this embodiment, the filter device 12 includes a filter device body (not shown in the figure) and a first-stage filter element (not shown in the figure) and a second-stage filter element (not shown in the figure) arranged in sequence in the filter device body; the filter device body is provided with two openings, which are respectively the air inlet end and the air outlet end of the filter device body.

[0047] Among them, the first-stage filter is arranged near the air inlet end of the filter body, and the first-stage filter performs the first filtering and adsorption of impurities in the exhaust gas; the second-stage filter is arranged near the air outlet end of the filter body, and the second-stage filter performs the second filtering and adsorption of impurities in the exhaust gas. At the same time, the filter device 12 adopts a modular design, with reasonable spacing design, easy to replace, maintain and clean; each level of the filter is equipped with an inspection door, and the inspection door is set with ergonomics in mind, which is convenient for later replacement of filter materials and maintenance.

[0048] Optionally, the first-stage filter element can use a medium-efficiency bag filter with a filtration accuracy of G4. The filter material is made of ultra-fine synthetic fiber, and the frame is supported by aluminum alloy. Each filter bag edge is fixed with a metal strip by hot-melt method to increase the strength of the filter screen. It has good air tightness and bonding strength, does not cause leakage or rupture, and the filtration efficiency for particles with a particle size ≥5μm can reach 65%.

[0049] Optionally, the second-stage filter element uses a medium-efficiency bag filter with a filtration accuracy of F6. The filter material is made of ultrafine synthetic fiber, and the frame is supported by aluminum alloy. Each filter bag edge is fixed with a metal strip by hot melting to increase the strength of the filter. It has good air tightness and bonding strength, does not leak or rupture, and the filtration efficiency for particles with a particle size ≥1μm can reach 85%.

[0050] It is understandable that after the particulate matter and dust-containing gas enters the filter device 12, it passes through the first-stage filter element and the second-stage filter element, and the filtered dust adheres to the windward side of the filter material, and the exhaust gas escapes from the leeward side of the filter material and enters the next treatment process or is discharged. At the same time, as the dust filtering process continues, the dust captured on the surface of the filter material becomes thicker and thicker, and the resistance of the dust layer increases. When the resistance reaches a certain value, the filter material needs to be replaced to ensure the normal, safe and stable operation of the exhaust gas treatment system.

[0051] Therefore, in this embodiment, please refer to Figure 6The filter device 12 also includes a first pressure sensor 121, a second pressure sensor 122 and a differential pressure transmitter 123 arranged in the filter device body. Among them, the first pressure sensor 121 is arranged between the first-stage filter element and the air inlet end of the filter device body; the second pressure sensor 122 is between the second-stage filter element and the air outlet end of the filter device body; the first pressure sensor 121 and the second pressure sensor 122 are both electrically connected to the differential pressure transmitter 123. When the pressure difference displayed by the differential pressure transmitter 123 is higher than a certain value, the control system issues an alarm to remind the operator to replace the filter material in time to ensure the normal, safe and stable operation of the exhaust gas treatment system.

[0052] Please refer to Figure 1 and Figure 6 In this embodiment, the exhaust gas treatment equipment 010 includes a first adsorption air valve 11.

[0053] Among them, a first adsorption air valve 11 is arranged on the pipeline connecting the filter device 12 and the activated carbon adsorption device 13; the air inlet end of the first adsorption air valve 11 is connected to the air outlet end of the filter device 12, and the air outlet end of the first adsorption air valve 11 is connected to the air inlet end of the activated carbon adsorption device 13.

[0054] Please refer to Figure 3 and Figure 2 In this embodiment, the exhaust gas treatment equipment 010 includes an activated carbon adsorption device 13 .

[0055] The activated carbon adsorption device 13 is provided with activated carbon for adsorbing the exhaust gas, that is, the activated carbon adsorbs organic matter in the exhaust gas. The air inlet end of the activated carbon adsorption device 13 is connected to the air outlet end of the first adsorption air valve 11, and the air inlet end of the activated carbon adsorption device 13 is also connected to the air inlet end of the first fan 17; the air outlet end of the activated carbon adsorption device 13 is connected to the air outlet end of the flame arrester 27, and the air outlet end of the activated carbon adsorption device 13 is also connected to the air inlet end of the second adsorption air valve 14.

[0056] In this embodiment, please refer to Figure 3 and Figure 2The activated carbon adsorption device 13 includes an adsorption device body 131, and an air inlet pipe structure 132 as an air inlet end is welded to the left end surface of the adsorption device body 131; and an air outlet pipe structure 133 as an air outlet end is welded to the right end surface of the adsorption device body 131. The adsorption device body 131 adopts a drawer-type structure, that is, a first filter group and a second filter group symmetrically arranged in two rows on the left and right are welded inside the adsorption device body 131; a plurality of first activated carbon filter units 134 are arranged in the first filter group, and a plurality of second activated carbon filter units 135 are arranged in the second filter group; and the plurality of first activated carbon filter units 134 and the plurality of second activated carbon filter units 135 are symmetrically arranged. Among them, the first activated carbon filter unit 134 and the second activated carbon filter unit 135 are both provided with an activated carbon adsorption layer.

[0057] Further, at one end of the first activated carbon filter unit 134 toward the air inlet pipe structure 132, a first baffle 136 is arranged between the spaced first activated carbon filter units 134; at one end of the second activated carbon filter unit 135 toward the air outlet pipe structure 133, a second baffle 137 is arranged between the spaced second activated carbon filter units 135; and a third baffle 138 is arranged between the first activated carbon filter unit 134 and the second activated carbon filter unit 135. The first baffle 136 and the second baffle 137 are asymmetrical.

[0058] Understandably, please refer to Figure 3 , the exhaust gas enters the adsorption device body 131 through the air intake pipe structure 132. The exhaust gas first stays in the air intake pipe structure 132, and the first baffle 136 disturbs the incoming exhaust gas, changes the running direction of the exhaust gas, and slows down the air flow speed; when the exhaust gas enters the adsorption device body 131, the second baffle 137 and the third baffle 138 disturb the incoming exhaust gas, and the exhaust gas flow is divided into multiple branch airflows, and the multiple branch airflows pass through the activated carbon adsorption layers in different first activated carbon filter units 134 and second activated carbon filter units 135 respectively; at the same time, the multiple micropores and large surface area on the activated carbon adsorption layer have strong adsorption capacity, and the organic matter in the exhaust gas is adsorbed in the activated carbon micropores, so that the exhaust gas is purified, and the clean gas is discharged to the exhaust pipe structure 133. Then the clean gas is discharged into the discharge pipe 16 under the action of the adsorption fan 15 for discharge.

[0059] Please refer to Figure 1 and Figure 6 In this embodiment, the exhaust gas treatment equipment 010 includes a second adsorption air valve 14.

[0060] Among them, a second adsorption air valve 14 is arranged on the pipeline connecting the adsorption fan 15 and the activated carbon adsorption device 13, the air inlet end of the second adsorption air valve 14 is connected to the air outlet end of the activated carbon adsorption device 13, and the air outlet end of the second adsorption air valve 14 is connected to the exhaust port.

[0061] Please refer to Figure 1 and Figure 6 In this embodiment, the exhaust gas treatment equipment 010 includes an adsorption fan 15 .

[0062] The air inlet end of the adsorption fan 15 is connected to the air outlet end of the activated carbon adsorption device 13 , and the air outlet end of the adsorption fan 15 is connected to the discharge port 161 of the discharge pipe 16 .

[0063] Please refer to Figure 1 and Figure 6 In this embodiment, the exhaust gas treatment device 010 includes an exhaust pipe 16. The exhaust pipe 16 includes an exhaust port 161. The exhaust port 161 is used to discharge the purified clean gas.

[0064] The exhaust port 161 is connected to the second air outlet 194 .

[0065] It is understood that the activated carbon of the activated carbon adsorption device 13 adsorbs the organic waste gas, and after a period of time, when the activated carbon reaches a saturated state, the adsorption stops, and the organic matter has been concentrated in the activated carbon. Finally, the saturated activated carbon is desorbed and regenerated by the following catalytic oxidation device, and the desorbed activated carbon is put back into use.

[0066] Please refer to Figure 1 and Figure 6 In this embodiment, the exhaust gas treatment device 010 includes a first fan 17; when the device is in a catalytic reaction, the first fan 17 is a power source for the airflow of the entire device to operate.

[0067] The air inlet end of the first fan 17 is connected to the air inlet end of the activated carbon adsorption device 13 ; the air outlet end of the first fan 17 is connected to the first air inlet 191 .

[0068] Please refer to Figure 1 and Figure 6 In this embodiment, the exhaust gas treatment device 010 includes a first concentration sensor 18 .

[0069] The first concentration sensor 18 is used to detect the concentration of organic matter in the exhaust gas; the first concentration sensor 18 is arranged in a pipeline connecting the air outlet end of the first fan 17 and the first air inlet 191 .

[0070] Please refer to Figure 4 In this embodiment, the exhaust gas treatment device 010 includes a heat exchanger 19 .

[0071] Among them, the first air inlet 191 is connected to the air outlet end of the first fan 17, and the first air outlet 192 is connected to the air inlet end of the heating component 21; the second air inlet 193 is connected to the air outlet end of the catalytic reaction device 22, and the second air outlet 194 is connected to the exhaust pipe 16.

[0072] In this embodiment, please refer to Figure 4 The heat exchanger 19 includes an exchange box 195 and a heat exchange tube 196 arranged in the exchange box 195; wherein, the exchange box 195 is provided with a first air inlet 191 and a first air outlet 192 which are connected to the inner cavity of the exchange box 195; wherein, the heat exchange tube 196 is arranged in an S shape and arranged in the cavity of the exchange box 195, one end of the heat exchange tube 196 is a second air inlet 193, and the other end is a second air outlet 194.

[0073] It can be understood that the catalytic reaction device 22 discharges clean gas with heat energy, and the clean gas enters the exchange box 195; the activated carbon adsorption device 13 desorbs and releases organic waste gas, and the organic waste gas enters the heat exchange tube 196. The clean gas and the waste gas are exchanged in the heat exchanger 19 to replace heat energy, thereby achieving the first temperature increase of the organic waste gas released by desorption, that is, the first preheating of the organic waste gas released by desorption.

[0074] The structure of the heat exchanger 19 is made of Q235 cold-rolled steel plate, and is reasonably arranged to allow the cold and hot air flows to be fully in contact, so that the energy can be fully replaced.

[0075] Please refer to Figure 1 and Figure 6 In this embodiment, the exhaust gas treatment device 010 includes a first temperature sensor 20 .

[0076] The first temperature sensor 20 is used to monitor the exhaust gas temperature before preheating, and the first temperature sensor 20 is disposed in a pipeline connecting the first air outlet 192 and the air inlet end of the heating component 21 .

[0077] It is understandable that when the first temperature sensor 20 detects that the preheating temperature of the exhaust gas exceeds the set maximum temperature, an alarm signal is immediately issued, the heating component 21 is turned off, and the direct exhaust device is turned on. The heating component 21 should be interlocked with the fan.

[0078] Please refer to Figure 1 and Figure 6 In this embodiment, the exhaust gas treatment device 010 includes a heating component 21.

[0079] The heating component 21 is used to heat the organic waste gas to reach the required temperature for the catalytic reaction in the catalytic reaction device 22. The air inlet end of the heating component 21 is connected to the first air outlet 192, and the air outlet end of the heating component 21 is connected to the air inlet end of the catalytic reaction device 22.

[0080] In this embodiment, the heating assembly 21 includes a heating chamber and an electric heating element arranged in the heating chamber; wherein the electric heating element is an infrared electric heating tube, which utilizes the radiation principle of electric heating to perform a second heating on the exhaust gas after the first preheating and make it reach the required temperature; the electric heating tube is composed of a φ16 high-temperature thin tube with fins wrapped around the outside, and lined with high-temperature magnesium oxide and electric heating wire, and has the characteristics of high efficiency, fast heat dissipation, and long life.

[0081] Please refer to Figure 5 In this embodiment, the exhaust gas treatment equipment 010 includes a catalytic reaction device 22 .

[0082] The catalytic reaction device 22 is used to decompose the organic waste gas into clean gas with heat energy. The air inlet of the catalytic reaction device 22 is connected to the air outlet of the heating component 21 , and the air outlet of the catalytic reaction device 22 is connected to the second air inlet 193 .

[0083] In this embodiment, the catalytic reaction device 22 includes a reaction chamber body 221 and a first-stage catalytic fixed bed 222 and a second-stage catalytic fixed bed 223 which are sequentially arranged in the reaction chamber body 221; the first-stage catalytic fixed bed 222 and the second-stage catalytic fixed bed 223 are both filled with honeycomb catalysts; and electric heating elements are inserted in the middle of the reaction chamber body 221.

[0084] It is understandable that the electric heating element uses the infrared radiation principle to make the temperature of the honeycomb catalyst of the first stage catalytic fixed bed 222 and the second stage catalytic fixed bed 223 reach the reaction temperature. The exhaust gas enters the reaction chamber body 221, and the first stage catalytic fixed bed 222 decomposes part of the organic matter in the exhaust gas, releasing energy, so that the exhaust gas temperature is raised for the third time, that is, catalytic heating; the exhaust gas with the raised temperature enters the second stage catalytic fixed bed 223, and the exhaust gas that meets the reaction conditions is completely decomposed here, and the exhaust gas becomes clean gas.

[0085] It is worth mentioning that the exhaust gas uses the heat released by its own oxidation to maintain spontaneous combustion. If the concentration of organic matter in the desorbed exhaust gas is high enough, the catalytic reaction device 22 requires very little electric power or even no electric power for heating during normal use, thus achieving true energy saving and environmental protection. At the same time, the entire device is safe, reliable, and free of any secondary pollution.

[0086] In this embodiment, please refer to Figure 5A second temperature sensor 224 and a third temperature sensor 225 are provided in the catalytic reaction device 22; the second temperature sensor 224 is arranged at the air inlet end of the catalytic reaction device 22, and is used to detect the temperature of the exhaust gas before catalysis; the third temperature sensor 225 is arranged at the air outlet end of the catalytic reaction device 22, and is used to detect the temperature of the exhaust gas after catalysis; wherein, the first temperature sensor 20, the third temperature sensor 225 and the motor of the heating component 21 are electrically connected for collaboratively monitoring the reaction temperature of the exhaust gas.

[0087] In this embodiment, a third pressure sensor 226 is further disposed in the catalytic reaction device 22 . The third pressure sensor 226 is used to monitor the pressure in the catalytic reaction device 22 .

[0088] Please refer to Figure 1 and Figure 6 In this embodiment, the exhaust gas treatment device 010 includes an exhaust flow valve 25 .

[0089] The input end of the discharge flow valve 25 is connected to the second gas outlet 194 , and the output end of the discharge flow valve 25 is connected to the discharge port 161 through the exhaust pipe. The discharge flow valve 25 is used to control the flow rate of the exhaust gas.

[0090] Please refer to Figure 1 and Figure 6 In this embodiment, the exhaust gas treatment device 010 includes a fourth temperature sensor 23 .

[0091] A fourth temperature sensor 23 is disposed in a pipeline connecting the second gas outlet 194 and the discharge flow valve 25 , and the fourth temperature sensor 23 is used to monitor the temperature of the discharged clean gas.

[0092] Please refer to Figure 1 and Figure 6 In this embodiment, the exhaust gas treatment device 010 includes a second concentration sensor 24 .

[0093] A second concentration sensor 24 is disposed in the pipeline between the second gas outlet 194 and the discharge flow valve 25 , and the second concentration sensor 24 is used to monitor the concentration of organic matter in the clean gas.

[0094] Please refer to Figure 1 and Figure 6 In this embodiment, the exhaust gas treatment equipment 010 includes a desorption air valve 26 .

[0095] The air inlet end of the desorption air valve 26 is communicated with the air outlet end of the second concentration sensor 24 , and the air outlet end of the desorption air valve 26 is communicated with the air inlet end of the flame arrester 27 .

[0096] Please refer to Figure 1 and Figure 6In this embodiment, the exhaust gas treatment device 010 includes a flame arrester 27 .

[0097] The air inlet end of the flame arrester 27 is connected to the air outlet end of the desorption air valve 26 , and the air outlet end of the flame arrester 27 is connected to the air outlet end of the activated carbon adsorption device 13 .

[0098] The flame arrester 27 is one of the safety facilities in the equipment and is used to separate the danger between the activated carbon adsorption device 13 and the exhaust gas source to ensure the safety between the treatment equipment and the production equipment. The structure is a corrugated mesh type and a cotton wool, manufactured in accordance with the standard, quick to replace and easy to clean.

[0099] Please refer to Figure 1 and Figure 6 In this embodiment, the exhaust gas treatment device 010 includes a fifth temperature sensor 28 .

[0100] A fifth temperature sensor 28 is disposed in the pipeline connecting the flame arrester 27 and the activated carbon adsorption device 13 , and the fifth temperature sensor 28 is used to detect the desorption intake air temperature.

[0101] Please refer to Figure 1 and Figure 6 In this embodiment, the exhaust gas treatment equipment 010 includes a cooling fan 29 .

[0102] The supplementary cooling fan 29 is used to send air into the activated carbon adsorption device 13 and cool it. The air outlet of the supplementary cooling fan 29 is connected to the air inlet of the flame arrester 27; and a supplementary cooling air valve 30 is also provided on the pipeline connecting the supplementary cooling fan 29 and the flame arrester 27.

[0103] When the activated carbon adsorption device 13 adsorbs the waste gas, the working principle of the waste gas treatment device 010 proposed by the utility model is:

[0104] The first adsorption air valve 11 and the second adsorption air valve 14 are opened, and the adsorption fan 15 is turned on;

[0105] The exhaust gas enters the filter device 12, which filters impurities in the exhaust gas; the exhaust gas enters the activated carbon adsorption device 13, where the exhaust gas is purified and the clean gas is discharged to the exhaust pipe structure 133; the clean gas is discharged to the exhaust pipe 16 under the action of the adsorption fan 15, and is discharged from the exhaust port 161.

[0106] When the activated carbon in the activated carbon adsorption device 13 reaches a saturated state, the working principle of the waste gas treatment device 010 proposed by the utility model is:

[0107] The first adsorption air valve 11 and the second adsorption air valve 14 are closed, and the first fan 17 is turned on;

[0108] The activated carbon adsorption device 13 is heated to a certain temperature so that the organic matter adsorbed by the activated carbon is desorbed to release the waste gas containing organic matter; under the action of the first fan 17, the waste gas enters the first air inlet 191 and is preheated for the first time in the heat exchange component, and then the waste gas is discharged from the first air outlet 192; the waste gas enters the heating component 21, and the heating component 21 heats the waste gas for the second time to make the waste gas reach the required temperature for the catalytic reaction; the waste gas enters the catalytic reaction device 22, and the catalytic reaction device 22 decomposes the waste gas and the heat released by the decomposition of the waste gas heats the gas for the third time, and then the waste gas is decomposed into clean gas with thermal energy; the clean gas with thermal energy enters the heat exchange component through the second air inlet 193 to preheat the waste gas in the heat exchange tube 196, and the temperature of the clean gas after heat exchange is reduced and discharged from the second air outlet 194.

[0109] When the second concentration sensor 24 detects that the concentration of the gas discharged from the second gas outlet 194 is lower than the dischargeable value, the discharge flow valve 25 is opened to discharge the gas from the discharge pipe 16 .

[0110] When the second concentration sensor 24 detects that the concentration of the gas discharged from the second gas outlet 194 is higher than the dischargeable value, the discharge flow valve 25 is closed, the desorption air valve 26 is opened, and the gas returns to the activated carbon adsorption device 13 through the flame arrester 27 for the next cycle.

[0111] In summary, the catalytic oxidation device proposed in the utility model, by setting a heat exchanger 19, allows the clean gas with thermal energy to enter the heat exchanger 19 to exchange heat with the organic waste gas, replace heat energy, and achieve the first temperature increase of the organic waste gas released by desorption, and reduce the temperature of the second heating of the organic waste gas by the heating component 21, thereby effectively reducing heat loss and energy consumption resources, and at the same time reducing the exhaust temperature of the clean gas after purification.

[0112] Furthermore, when the organic matter concentration of the organic waste gas reaches a certain value, the heat exchanger 19 can ensure that the equipment can operate normally under no operating power or low power conditions.

[0113] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A catalytic oxidation device, characterized in that: include: A heat exchanger, the heat exchanger comprising a first air inlet and a first air outlet and a second air inlet and a second air outlet which are respectively connected; An activated carbon adsorption device, a heating component and a catalytic reaction device connected to each other, wherein the air inlet end of the activated carbon adsorption device is connected to the first air inlet, the first air outlet is connected to the air inlet end of the heating component, the air outlet end of the heating component is connected to the air inlet end of the catalytic reaction device, the air outlet end of the catalytic reaction device is connected to the second air inlet, and the second air outlet is connected to the air outlet end of the activated carbon adsorption device; A discharge port is communicated with the second air outlet.

2. The catalytic oxidation device according to claim 1, characterized in that: The catalytic oxidation device further comprises a first fan, an air inlet end of the first fan is connected to an air inlet end of the activated carbon adsorption device, and an air outlet end of the first fan is connected to the first air inlet.

3. The catalytic oxidation device according to claim 1, characterized in that: The catalytic oxidation device further comprises a supplementary cooling fan for cooling the activated carbon adsorption device, and an air outlet end of the supplementary cooling fan is connected to an air outlet end of the activated carbon adsorption device; A supplementary cooling air valve is provided at the air outlet end of the supplementary cooling air fan.

4. The catalytic oxidation device according to claim 1, characterized in that: The catalytic oxidation device further comprises a flame arrester, wherein an air inlet end of the flame arrester is communicated with the second air outlet, and an air outlet end of the flame arrester is communicated with an air outlet end of the activated carbon adsorption device.

5. The catalytic oxidation device according to claim 1, characterized in that: A discharge flow valve is provided between the discharge port and the second air outlet.

6. The catalytic oxidation device according to claim 1, characterized in that: A first temperature sensor is provided in a pipeline connecting the first air outlet and the air inlet end of the heating component.

7. The catalytic oxidation device according to claim 6, characterized in that: The catalytic reaction device is provided with a second temperature sensor and a third temperature sensor. The second temperature sensor is arranged at the air inlet end of the catalytic reaction device, and the third temperature sensor is arranged at the air outlet end of the catalytic reaction device.

8. The catalytic oxidation device according to claim 7, characterized in that: The first temperature sensor, the third temperature sensor and the motor of the heating component are electrically connected.

9. The catalytic oxidation device according to claim 1, characterized in that: A third pressure sensor is arranged in the catalytic reaction device.

10. A waste gas treatment device, characterized in that: include: The catalytic oxidation device according to any one of claims 1 to 9, wherein the air inlet end of the activated carbon adsorption device is used to introduce exhaust gas, and the air outlet end of the activated carbon adsorption device is connected to the exhaust port.

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