Coating waste gas treatment equipment

Abstract

The utility model relates to coating waste gas treatment equipment, and relates to the field of waste gas treatment equipment. The utility model provides coating waste gas treatment equipment. The coating waste gas treatment equipment comprises an activated carbon adsorption device, a catalytic reaction device, a flame arrester, a cold air supplementing fan and a spraying unit, activated carbon for adsorbing waste gas is arranged in the activated carbon adsorption device; the gas inlet end of the catalytic reaction device is communicated with the gas outlet end of the activated carbon adsorption device; the air inlet end of the flame arrester is communicated with the air outlet end of the catalytic reaction device, and the air outlet end of the flame arrester is communicated with the air outlet end of the activated carbon adsorption device; the air outlet end of the cold air supplementing machine is communicated with the air inlet end of the flame arrester; the water outlet end of the spraying unit is communicated with the activated carbon adsorption device and is used for spraying and extinguishing the activated carbon. The waste gas equipment has three-level fire-fighting measures, the activated carbon adsorption device is cooled in time, the equipment safety can be guaranteed, and the operation cost is controllable.

Description

Technical Field

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

[0002] At present, the treatment of organic waste gas in the spraying industry mainly adopts activated carbon adsorption and CO catalytic oxidation process; the gas after activated carbon adsorption meets the emission standards, and then a small amount of hot air is used to desorb the activated carbon.

[0003] The inventors have discovered that during the activated carbon desorption process, as the temperature rises, the risk of activated carbon catching fire increases. However, the current fire extinguishing facilities for activated carbon use a simple water spray device. After the fire is extinguished by water spray, all the activated carbon in the entire adsorption device needs to be replaced, resulting in excessively high operating costs. Utility Model Content

[0004] The purpose of the utility model is to provide a coating waste gas treatment device, which has three-level fire protection measures, timely cools down the activated carbon adsorption device, and ensures the safety of the equipment.

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

[0006] The utility model proposes a coating waste gas treatment equipment, comprising an activated carbon adsorption device, a catalytic reaction device, a flame arrester, a supplementary cooling fan and a spray unit; the activated carbon adsorption device is provided with activated carbon for adsorbing waste gas; the air inlet end of the catalytic reaction device is connected with the air outlet end of the activated carbon adsorption device; the air inlet end of the flame arrester is connected with the air outlet end of the catalytic reaction device, and the air outlet end of the flame arrester is connected with the air outlet end of the activated carbon adsorption device; the air outlet end of the supplementary cooling fan is connected with the air inlet end of the flame arrester; the water outlet end of the spray unit is connected with the activated carbon adsorption device and is used for spraying activated carbon for fire extinguishing.

[0007] Furthermore, the activated carbon adsorption device comprises an adsorption device body, wherein the adsorption device body is provided with a plurality of first activated carbon filter units and a second activated carbon filter unit, and the plurality of first activated carbon filter units and the plurality of second activated carbon filter units are symmetrically arranged;

[0008] The plurality of first activated carbon filter units and the plurality of second activated carbon filter units are provided with baffles.

[0009] Further, the baffle includes a first baffle, a second baffle and a third baffle;

[0010] On the side of the first activated carbon filter unit facing the air inlet end, the first baffles are arranged between adjacent first activated carbon filter units, and the first baffles are arranged at intervals;

[0011] On the side of the second activated carbon filter unit facing the air outlet, the second baffles are arranged between adjacent second activated carbon filter units, the second baffles are arranged at intervals, and the first baffle and the second baffle are arranged asymmetrically;

[0012] The third baffle is connected between the first activated carbon filter unit and the second activated carbon filter unit.

[0013] Furthermore, the coating waste gas treatment equipment further comprises a desorption air valve and a fifth temperature sensor, wherein the fifth temperature sensor is arranged in a pipeline connecting the gas outlet end of the flame arrester and the gas outlet end of the activated carbon adsorption device;

[0014] The air inlet end of the desorption air valve is connected to the air outlet end of the catalytic reaction device, and the air outlet end of the desorption air valve is connected to the air inlet end of the flame arrester;

[0015] The desorption air valve, the fifth temperature sensor and the motor of the supplementary cooling fan are electrically connected.

[0016] Further, the spray unit includes a water supply device and a solenoid valve;

[0017] The water supply device is used to supply water, the water outlet end of the water supply device is connected to the input end of the solenoid valve, and the output end of the solenoid valve is connected to the activated carbon adsorption device.

[0018] Furthermore, a sixth temperature sensor is provided in the activated carbon adsorption device, and the sixth temperature sensor is used to detect the temperature of the activated carbon in the activated carbon adsorption device;

[0019] The solenoid valve is electrically connected to the sixth temperature sensor.

[0020] Furthermore, the coating waste gas treatment equipment also includes a cooling air supplement valve;

[0021] The air inlet end of the supplementary cooling air valve is communicated with the air outlet end of the supplementary cooling air fan, and the air outlet end of the supplementary cooling air valve is communicated with the air inlet end of the flame arrester.

[0022] Furthermore, the painting waste gas treatment equipment also includes an exhaust port;

[0023] The exhaust port is communicated with the gas outlet end of the catalytic reaction device, and the exhaust port is also communicated with the gas outlet end of the activated carbon adsorption device.

[0024] Furthermore, the painting waste gas treatment equipment further includes a first adsorption air valve and a second adsorption air valve;

[0025] The air inlet end of the first adsorption air valve is used to introduce waste gas, and the air outlet end of the first adsorption air valve is connected to the air inlet end of the activated carbon adsorption device;

[0026] The air inlet end of the second adsorption air valve is communicated with the air outlet end of the activated carbon adsorption device, and the air outlet end of the second adsorption air valve is communicated with the discharge port.

[0027] Furthermore, the painting waste gas treatment equipment further includes a first fan;

[0028] The air inlet end of the first fan is communicated with the air inlet end of the activated carbon adsorption device, and the air outlet end of the first fan is communicated with the air inlet end of the heating component.

[0029] The beneficial effects of the embodiments of the utility model are:

[0030] This exhaust gas equipment is equipped with a flame arrester, which is arranged between the activated carbon adsorption device and the catalytic reaction device to isolate the activated carbon adsorption device from the flame in the high-temperature exhaust gas; by arranging a cooling fan, the cooling fan performs preliminary cooling on the inside of the activated carbon adsorption device to prevent the activated carbon from catching fire due to excessive temperature; by arranging a spray unit, the activated carbon that has caught fire in the activated carbon adsorption device is sprayed to extinguish the fire to prevent the fire from spreading to other areas; this exhaust gas equipment has three-level fire-fighting measures, which can cool down the activated carbon adsorption device in time, ensure the safety of the equipment, and control the operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] 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.

[0032] Figure 1 This is a schematic diagram of a coating waste gas treatment device according to an embodiment of the utility model;

[0033] Figure 2 This is a schematic diagram of the structure of an activated carbon adsorption device according to an embodiment of the utility model;

[0034] 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;

[0035] Figure 4 It is a schematic structural diagram of a catalytic reaction device according to an embodiment of the utility model.

[0036] Icons: 010-painting waste gas treatment equipment; 11-first adsorption air valve; 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; 139-sixth temperature sensor; 14-second adsorption air valve; 15-adsorption fan; 16-discharge pipe; 161-discharge port; 17-first fan; 18-first concentration sensor; 2 0-first temperature sensor; 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-supplement cooling fan; 30-supplement cooling air valve; 31-spray unit; 311-water supply device; 312-solenoid valve. DETAILED DESCRIPTION

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] At present, in the spraying waste gas treatment project of automobile sheet metal spraying, 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: the source of generation is fixed; it contains a large amount of dust particles; intermittent operation, low continuity; low waste gas concentration; complex composition. The treatment of organic waste gas in the spraying industry mainly adopts activated carbon adsorption and CO catalytic oxidation process; the gas after activated carbon adsorption meets the emission standards, and then a small amount of hot air is used to desorb the activated carbon.

[0044] The inventors have found that the activated carbon adsorption device 13 is used to adsorb waste gas, and 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 to release the organic waste gas, and the organic waste gas is decomposed by the catalytic reaction device 22 to generate heat energy and become clean gas. In addition, as the activated carbon desorbs, the waste gas increases in temperature, and the risk of activated carbon ignition increases. At present, the fire extinguishing facilities for activated carbon use a simple water spray device. After the fire is extinguished by water spray, the activated carbon in the entire adsorption device needs to be completely replaced, resulting in excessively high operating costs.

[0045] Therefore, the utility model proposes an exhaust gas device, which is used in the spraying exhaust gas treatment project for automobile body spraying.

[0046] Please refer to Figure 1 The utility model proposes an exhaust gas equipment, including an activated carbon adsorption device 13, a catalytic reaction device 22, a flame arrester 27, a supplementary cooling fan 29 and a spray unit 31; the activated carbon adsorption device 13 is provided with activated carbon for adsorbing exhaust gas; the air inlet end of the catalytic reaction device 22 is connected to the air outlet end of the activated carbon adsorption device 13; the air inlet end of the flame arrester 27 is connected to the air outlet end of the catalytic reaction device 22, and the air outlet end of the flame arrester 27 is connected to the air outlet end of the activated carbon adsorption device 13; the air outlet end of the supplementary cooling fan 29 is connected to the air inlet end of the flame arrester 27; the water outlet end of the spray unit 31 is connected to the activated carbon adsorption device 13 and is used to spray the activated carbon for fire extinguishing.

[0047] It can be understood that by providing a flame arrester 27, which is provided between the activated carbon adsorption device 13 and the catalytic reaction device 22, the activated carbon adsorption device 13 is blocked from the flame in the high-temperature exhaust gas; by providing a supplementary cooling fan 29, the supplementary cooling fan 29 performs preliminary cooling on the inside of the activated carbon adsorption device 13 to prevent the activated carbon from catching fire due to excessive temperature; by providing a spray unit 31, the activated carbon that has caught fire in the activated carbon adsorption device 13 is sprayed to extinguish the fire, thereby preventing the fire from spreading to other areas and ensuring the safety of the equipment.

[0048] Please refer to Figure 1 In this embodiment, the painting waste gas treatment equipment 010 includes a first adsorption air valve 11.

[0049] The air inlet end of the first adsorption air valve 11 is used to introduce the exhaust gas, 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 .

[0050] Optionally, when there are particulate impurities in the exhaust gas, a filter device can be provided at the air inlet end of the first adsorption air valve 11. The air inlet end of the filter device is used to pass the exhaust gas, and the air outlet end of the filter device is connected to the air inlet end of the activated carbon adsorption device 13 through the first adsorption air valve 11. The filter device includes a filter device body (not shown) and a first-stage filter element (not shown) and a second-stage filter element (not shown) sequentially arranged in the filter device body; the first-stage filter element is arranged close to the air inlet end of the filter device body, and the first-stage filter element performs the first filtering and adsorption of impurities in the exhaust gas; the second-stage filter element is arranged close to the air outlet end of the filter device body, and the second-stage filter element performs the second filtering and adsorption of impurities in the exhaust gas.

[0051] Please refer to Figure 2 and Figure 3 In this embodiment, the painting waste gas treatment equipment 010 includes an activated carbon adsorption device 13 .

[0052] 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.

[0053] In this embodiment, please refer to Figure 2 The 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.

[0054] 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, and the first baffles 136 are arranged at intervals; 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 the second baffles 137 are arranged at intervals; and a third baffle 138 is arranged between the first activated carbon filter unit 134 and the second activated carbon filter unit 135. Among them, the first baffle 136 and the second baffle 137 are arranged asymmetrically.

[0055] 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.

[0056] In this embodiment, a sixth temperature sensor 139 is provided in the activated carbon adsorption device 13, and the sixth temperature sensor 139 is used to detect the temperature of the activated carbon in the activated carbon adsorption device 13, that is, to detect the temperature of the first activated carbon filter unit 134 and the second activated carbon filter unit 135; the solenoid valve 312 is electrically connected to the sixth temperature sensor 139.

[0057] The sixth temperature sensor 139 detects that the temperature in the activated carbon adsorption device 13 is too high, and the solenoid valve 312 is opened to allow the water outlet of the spray unit 31 to supply water to the first activated carbon filter unit 134 and the second activated carbon filter unit 135 for spraying and extinguishing the fire.

[0058] Please refer to Figure 1 In this embodiment, the painting waste gas treatment equipment 010 includes a second adsorption air valve 14 .

[0059] 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 discharge port 161.

[0060] Please refer to Figure 1 In this embodiment, the painting waste gas treatment equipment 010 includes an adsorption fan 15 .

[0061] 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 .

[0062] Please refer to Figure 1 In this embodiment, the painting exhaust gas treatment equipment 010 includes an exhaust pipe 16 .

[0063] The discharge pipe 16 includes a discharge port 161 for discharging the purified clean gas. The discharge port 161 is connected to the outlet of the discharge flow valve 25 through the discharge pipe 16; and the discharge port 161 is connected to the outlet of the adsorption fan 15 through the discharge pipe 16.

[0064] 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 device, and the desorbed activated carbon is put back into use.

[0065] Please refer to Figure 1 In this embodiment, the painting waste gas treatment equipment 010 includes a first fan 17 .

[0066] When the coating waste gas treatment equipment 010 desorbs the activated carbon, the first fan 17 is the power source for the airflow to operate. The air inlet of the first fan 17 is connected to the air inlet of the activated carbon adsorption device 13; the air outlet of the first fan 17 is connected to the air inlet of the heating component.

[0067] Please refer to Figure 1 In this embodiment, the painting exhaust gas treatment equipment 010 includes a first concentration sensor 18 .

[0068] 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 air inlet end of the heating component.

[0069] Please refer to Figure 1 In this embodiment, the painting exhaust gas treatment equipment 010 includes a first temperature sensor 20 .

[0070] The first temperature sensor 20 is used to monitor the exhaust gas temperature before the catalytic reaction. The first temperature sensor 20 is disposed in a pipeline connecting the air outlet end of the first fan 17 and the air inlet end of the heating component.

[0071] It is understandable that when the first temperature sensor 20 detects that the temperature of the exhaust gas exceeds the set maximum temperature, an alarm signal is immediately issued, the heating component is turned off, and the direct exhaust device is turned on. The heating component should be interlocked with the fan.

[0072] Please refer to Figure 4 In this embodiment, the painting waste gas treatment equipment 010 includes a catalytic reaction device 22 .

[0073] The catalytic reaction device 22 is used to decompose the organic waste gas into clean gas. The air inlet of the catalytic reaction device 22 is connected to the air outlet of the heating component; the air outlet of the catalytic reaction device 22 is connected to the discharge flow valve 25, and the air outlet of the catalytic reaction device 22 is also connected to the air inlet of the desorption air valve 26.

[0074] In this embodiment, please refer to Figure 4 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.

[0075] 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, directly raising the exhaust gas temperature, 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.

[0076] In this embodiment, please refer to Figure 4 A 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 are electrically connected to coordinately monitor the reaction temperature of the exhaust gas.

[0077] 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 .

[0078] Optionally, the painting waste gas treatment equipment 010 may further include a heating component (not shown); the heating component is used to heat the organic waste gas to a temperature required for the catalytic reaction to occur in the catalytic reaction device 22. The heating component is disposed between the first fan 17 and the catalytic reaction device 22; the air inlet end of the heating component is connected to the air outlet end of the first fan 17; and the air outlet end of the heating component is connected to the air inlet end of the catalytic reaction device 22.

[0079] Please refer to Figure 1 In this embodiment, the painting exhaust gas treatment equipment 010 includes an exhaust flow valve 25 .

[0080] The input end of the discharge flow valve 25 is connected to the gas outlet end of the catalytic reaction device 22, and the output end of the discharge flow valve 25 is connected to the discharge port 161 through the discharge port 161 pipe. The discharge flow valve 25 is used to control the flow rate of the exhaust gas.

[0081] Please refer to Figure 1 In this embodiment, the painting exhaust gas treatment equipment 010 includes a fourth temperature sensor 23 .

[0082] A fourth temperature sensor 23 is disposed in a pipeline connected to the exhaust flow valve 25 of the catalytic reaction device 22 , and the fourth temperature sensor 23 is used to monitor the exhaust temperature of the clean gas.

[0083] Please refer to Figure 1 In this embodiment, the painting exhaust gas treatment equipment 010 includes a second concentration sensor 24 .

[0084] A second concentration sensor 24 is provided in the pipeline between the catalytic reaction device 22 and the exhaust flow valve 25 , and the second concentration sensor 24 is used to monitor the concentration of organic matter in the clean gas.

[0085] Please refer to Figure 1 In this embodiment, the painting waste gas treatment equipment 010 includes a desorption air valve 26 .

[0086] 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 .

[0087] Please refer to Figure 1 In this embodiment, the painting waste gas treatment equipment 010 includes a flame arrester 27 .

[0088] 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 .

[0089] The flame arrester 27 is one of the safety facilities in the equipment and is used to isolate the flame 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 cotton, manufactured in accordance with the standard, quick to replace and easy to clean.

[0090] Please refer to Figure 1 In this embodiment, the painting exhaust gas treatment equipment 010 includes a fifth temperature sensor 28 .

[0091] 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.

[0092] The desorption air valve 26 , the fifth temperature sensor 28 and the motor of the supplementary cooling fan 29 are electrically connected.

[0093] Please refer to Figure 1 In this embodiment, the painting waste gas treatment equipment 010 includes a cooling fan 29 .

[0094] 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.

[0095] Please refer to Figure 1 In this embodiment, the painting waste gas treatment equipment 010 includes a spray unit 31; the water outlet of the spray unit 31 is connected to the activated carbon adsorption device 13 and is used to spray the activated carbon to extinguish the fire.

[0096] Please refer to Figure 1 In this embodiment, the spray unit 31 includes a water supply device 311 and a solenoid valve 312; the water supply device 311 is used to supply water, the water outlet end of the water supply device 311 is connected to the input end of the solenoid valve 312, and the output end of the solenoid valve 312 is connected to the activated carbon adsorption device 13.

[0097] Optionally, a nozzle for spraying can also be provided in the activated carbon adsorption device 13, and the nozzle is connected to the water outlet end of the solenoid valve 312, so that when the multiple first activated carbon filter units 134 and the multiple second activated carbon filter units 135 in the activated carbon adsorption device 13 catch fire, the water supplied by the water supply device 311 can effectively spray them.

[0098] When the activated carbon adsorption device 13 adsorbs the exhaust gas, the working principle of the coating exhaust gas treatment equipment 010 proposed in the utility model is: the first adsorption air valve 11 and the second adsorption air valve 14 are opened, and the adsorption fan 15 is turned on; the exhaust gas enters the activated carbon adsorption device 13, the exhaust gas is purified, and the clean gas is discharged to the exhaust pipe structure 133; the clean gas is discharged into the exhaust pipe 16 under the action of the adsorption fan 15, and is discharged from the exhaust port 161.

[0099] When the activated carbon in the activated carbon adsorption device 13 reaches a saturated state, the working principle of the coating waste gas treatment equipment 010 proposed by the utility model is: the first adsorption air valve 11 and the second adsorption air valve 14 are closed, the emission flow valve 25 is opened, and the first fan 17 is turned on; the activated carbon adsorption device 13 is heated to a certain temperature to desorb the organic matter adsorbed by the activated carbon to release the waste gas containing organic matter; under the action of the first fan 17, the waste gas enters the catalytic reaction device 22, and the catalytic reaction device 22 decomposes the waste gas into clean gas with thermal energy; the clean gas passes through the emission flow valve 25, and is discharged into the emission pipe 16 under the action of the first fan 17, and is discharged from the emission port 161.

[0100] When the second concentration sensor 24 detects that the concentration of the exhaust gas from the catalytic reaction device 22 is lower than the dischargeable value, the exhaust flow valve 25 is opened to discharge the gas from the exhaust pipe 16 .

[0101] When the second concentration sensor 24 detects that the concentration of the exhaust gas from the catalytic reaction device 22 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.

[0102] Specifically, in the above-mentioned desorption process: the first level fire-fighting measure is: the flame arrester 27 blocks the flame in the activated carbon adsorption device 13 from the exhaust gas. The second level fire-fighting measure is: during desorption, the fifth temperature sensor 28 detects the inlet temperature of the outlet end of the activated carbon adsorption device 13. If the temperature is too high, the supplementary cooling fan 29 is turned on to deliver cold air to cool it. The third level fire-fighting measure is: during desorption, the temperature inside the activated carbon adsorption device 13 is too high, and multiple first activated carbon filter units 134 and multiple second activated carbon filter units 135 are on fire. The sixth temperature sensor 139 detects that the temperature is too high, then the solenoid valve 312 is turned on to spray and extinguish the activated carbon that has caught fire, so as to prevent the fire from spreading to other areas and ensure the safety of the equipment.

[0103] In summary, the utility model proposes an exhaust gas equipment, which blocks the activated carbon adsorption device 13 from the flame in the high-temperature exhaust gas by arranging a flame arrester 27, which is arranged between the activated carbon adsorption device 13 and the catalytic reaction device 22; by arranging a supplementary cooling fan 29, the supplementary cooling fan 29 performs preliminary cooling on the inside of the activated carbon adsorption device 13 to prevent the activated carbon from catching fire due to excessive temperature; by arranging a spray unit 31, the activated carbon that has caught fire in the activated carbon adsorption device 13 is sprayed to extinguish the fire, so as to prevent the fire from spreading to other areas and ensure the safety of the equipment.

[0104] Furthermore, the waste gas equipment has three-level fire-fighting measures, which can timely cool down the activated carbon adsorption device 13, thereby ensuring the safety of the equipment and avoiding the situation where the activated carbon adsorption device 13 is sprayed as soon as the temperature is high, so that the operating cost can be controlled.

[0105] 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 coating waste gas treatment equipment, characterized in that: include: An activated carbon adsorption device, wherein the activated carbon adsorption device is provided with activated carbon for adsorbing the exhaust gas; A catalytic reaction device, wherein the air inlet end of the catalytic reaction device is connected to the air outlet end of the activated carbon adsorption device; A flame arrester, wherein the air inlet end of the flame arrester is connected to the air outlet end of the catalytic reaction device, and the air outlet end of the flame arrester is connected to the air outlet end of the activated carbon adsorption device; A supplementary cooling fan, wherein the air outlet of the supplementary cooling fan is connected to the air inlet of the flame arrester; A spray unit, the water outlet of which is connected to the activated carbon adsorption device and is used to spray the activated carbon to extinguish fire.

2. The painting waste gas treatment equipment according to claim 1, characterized in that: The activated carbon adsorption device comprises an adsorption device body, wherein the adsorption device body is provided with a plurality of first activated carbon filter units and a second activated carbon filter unit, wherein the plurality of first activated carbon filter units and the plurality of second activated carbon filter units are symmetrically arranged; The plurality of first activated carbon filter units and the plurality of second activated carbon filter units are provided with baffles.

3. The painting waste gas treatment equipment according to claim 2, characterized in that: The baffle comprises a first baffle, a second baffle and a third baffle; On the side of the first activated carbon filter unit facing the air inlet end, the first baffles are arranged between adjacent first activated carbon filter units, and the first baffles are arranged at intervals; On the side of the second activated carbon filter unit facing the air outlet, the second baffles are arranged between adjacent second activated carbon filter units, the second baffles are arranged at intervals, and the first baffle and the second baffle are arranged asymmetrically; The third baffle is connected between the first activated carbon filter unit and the second activated carbon filter unit.

4. The painting waste gas treatment equipment according to claim 1, characterized in that: The coating waste gas treatment equipment further includes a desorption air valve and a fifth temperature sensor, wherein the fifth temperature sensor is arranged in a pipeline connecting the gas outlet end of the flame arrester and the gas outlet end of the activated carbon adsorption device; The air inlet end of the desorption air valve is connected to the air outlet end of the catalytic reaction device, and the air outlet end of the desorption air valve is connected to the air inlet end of the flame arrester; The desorption air valve, the fifth temperature sensor and the motor of the supplementary cooling fan are electrically connected.

5. The painting waste gas treatment equipment according to claim 1, characterized in that: The spray unit includes a water supply device and a solenoid valve; The water supply device is used to supply water, the water outlet end of the water supply device is connected to the input end of the solenoid valve, and the output end of the solenoid valve is connected to the activated carbon adsorption device.

6. The painting waste gas treatment equipment according to claim 5, characterized in that: A sixth temperature sensor is provided in the activated carbon adsorption device, and the sixth temperature sensor is used to detect the temperature of the activated carbon in the activated carbon adsorption device; The solenoid valve is electrically connected to the sixth temperature sensor.

7. The painting waste gas treatment equipment according to claim 1, characterized in that: The coating waste gas treatment equipment also includes a cooling air supply valve; The air inlet end of the supplementary cooling air valve is communicated with the air outlet end of the supplementary cooling air fan, and the air outlet end of the supplementary cooling air valve is communicated with the air inlet end of the flame arrester.

8. The painting waste gas treatment equipment according to claim 1, characterized in that: The painting waste gas treatment equipment also includes an exhaust port; The exhaust port is communicated with the gas outlet end of the catalytic reaction device, and the exhaust port is also communicated with the gas outlet end of the activated carbon adsorption device.

9. The painting waste gas treatment equipment according to claim 8, characterized in that: The painting waste gas treatment equipment also includes a first adsorption air valve and a second adsorption air valve; The air inlet end of the first adsorption air valve is used to introduce waste gas, and the air outlet end of the first adsorption air valve is connected to the air inlet end of the activated carbon adsorption device; The air inlet end of the second adsorption air valve is communicated with the air outlet end of the activated carbon adsorption device, and the air outlet end of the second adsorption air valve is communicated with the discharge port.

10. The painting waste gas treatment equipment according to claim 1, characterized in that: A nozzle is arranged in the carbon adsorption device, and the nozzle is communicated with the water outlet end of the spray unit.

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