A painting line exhaust recovery device

Abstract

The utility model relates to a kind of coating production line waste gas recovery device, including the condensing separation tank that can carry out low-temperature separation of organic component in waste gas, and the pretreatment component that is connected with the precooling of input waste gas is connected in the input end of the separation tank, the output end of the condensing separation tank is also provided with the adsorption filter component that can carry out adsorption separation of residual component in waste gas, the output end of the adsorption filter component is connected with the exhaust line that can be connected with the heat exchange insertion pipe of pretreatment component communicates, wherein, in the top cover of the condensing separation tank, several heat exchange insertion columns that can carry out multiple shunt and condensate of waste gas directional flow in the box cavity of condensing separation tank are inserted according to staggered array distribution mode.The utility model can construct ultra-low temperature environment by staggered array layout condensing structure to effectively separate organic component in waste gas, and also can use low-temperature waste gas to precool waste gas to be condensed.

Description

Technical Field

[0001] This utility model relates to the technical field of coating waste gas recovery equipment, and in particular to a coating production line waste gas recovery device. Background Technology

[0002] Spray painting is a common surface treatment method used in industries such as machinery manufacturing, automobile manufacturing, metal product processing, and furniture manufacturing. It involves using air pressure generated by a spray gun to disperse paint or coating into uniform, fine droplets, which are then evenly sprayed onto the surface of an object. Paints contain film-forming substances, various solid additives, solvents, and thinners, thus generating a large amount of paint mist dust during spray painting, along with organic waste gases such as toluene, xylene, solvent gasoline, alcohols, and esters. These waste gases result in the presence of paint dust and volatile organic pollutants such as benzene and benzene derivatives in the workplace air, posing a significant hazard to spray painting workers. Direct emission of these waste gases into the air also impacts air quality.

[0003] Traditional methods for removing paint mist typically employ water-washed spray booths or spray towers. However, these methods have limited effectiveness in adsorbing paint mist and introduce a large amount of water vapor into the exhaust gas, reducing the adsorption capacity of the adsorption device and causing it to malfunction. In particular, water-washed structures are ineffective at removing organic waste gas. Even when the adsorption capacity is compromised, the actual exhaust gas still poses a significant hazard. Therefore, current devices used to treat exhaust gas generated by spray painting production lines have poor treatment performance and cannot effectively treat the exhaust gas, leaving residual exhaust gas to pollute the working environment and harm human health. Utility Model Content

[0004] The purpose of this invention is to provide a coating production line waste gas recovery device that can create an ultra-low temperature environment through a staggered array of condensation structures to effectively extract organic components from waste gas. Simultaneously, it can utilize the low-temperature waste gas output after condensation to pre-cool the waste gas to be condensed, reducing the moisture content and temperature of the waste gas, thereby reducing energy consumption during condensation and improving the adsorption and filtration effect of the waste gas. This addresses the problems of existing spraying waste gas equipment failing to effectively remove moisture from waste gas after water washing, thus affecting the adsorption effect of downstream modules for organic matter filtration and failing to guarantee the waste gas filtration effect; existing condensation structures failing to fully condense and extract organic matter from the waste gas, resulting in poor condensation effect; and the high energy consumption and low energy utilization rate of a single condensation structure.

[0005] The technical solution adopted by this utility model is as follows: a waste gas recovery device for a coating production line, including a condensation separation box capable of low-temperature precipitation of organic components in the waste gas, and a pre-treatment component for pre-cooling the input waste gas connected to the input end of the separation box. The output end of the condensation separation box is also provided with an adsorption filter component capable of adsorbing and separating residual components in the waste gas. The output end of the adsorption filter component is connected to an exhaust pipe that can be connected to the heat exchange tube of the pre-treatment component. A number of heat exchange columns capable of multiple diversions and condensation of the waste gas flowing directionally within the chamber of the condensation separation box are inserted into the top cover of the condensation separation box in a staggered array.

[0006] According to a preferred embodiment, the condensation separation box includes a main shell, a top cover, a partition, and a slag discharge pipe. The top cover is detachably fastened to the top opening of the main shell, and a partition is installed inside the shell cavity of the main shell. A slag discharge pipe is also inserted into the bottom of the main shell.

[0007] According to a preferred embodiment, an air inlet and an air outlet are respectively inserted on both sides of the main housing, and a lower flange is provided on the outer side of the main housing.

[0008] According to a preferred embodiment, an upper flange edge is provided on the outer side of the top cover in a manner corresponding to the lower flange edge; an annular protrusion is provided on the lower edge of the top cover; and a plurality of heat exchange plugs capable of extending into the main housing are inserted into the top cover in a staggered array.

[0009] According to a preferred embodiment, a plurality of through holes are provided on the plate body of the partition in a staggered array in the same manner as the heat exchange plugs.

[0010] According to a preferred embodiment, a vertical heat-insulating baffle capable of dividing the cylindrical shell cavity is inserted into the shell of the heat exchange plug to form a U-shaped evaporation tube cavity capable of limiting the directional flow of the cooling medium, and auxiliary heat exchange fins are laid on the shell wall of the shell.

[0011] According to a preferred embodiment, the inclined lower end outlet of the inclined tube of the pretreatment component is connected to the air inlet of the main housing. Heat exchange tubes separated from the tube cavity are inserted at intervals on the inclined tube wall of the inclined tube. The axial lower end and axial upper end of the multiple heat exchange tubes connected in parallel are respectively connected to a shunt head and a manifold head.

[0012] According to a preferred embodiment, the end of the shunt tube head furthest from the heat exchange tube is connected to the output end of the exhaust pipe.

[0013] According to a preferred embodiment, the adsorption filtration assembly includes an adsorption box, a container basket, and a sealing cover, wherein the container basket, which contains activated carbon, is disposed in the adsorption box in a manner adapted to fit the inner cavity of the adsorption box, and a sealing cover is detachably installed on the top opening of the adsorption box to form a sealed cavity therewith.

[0014] The beneficial effects of this utility model are:

[0015] The heat exchange column provided in this application can effectively separate organic components in waste gas through low-temperature condensation. The constructed cold end can fully cool the waste gas in contact with it, thereby ensuring the separation effect and efficiency. In particular, the staggered array arrangement can divert and disturb the directional flow of waste gas multiple times, and also form a step-by-step cooling to a certain extent. This improves the mobility of gas molecules in the waste gas and fully reduces the temperature of the waste gas, so as to promote full and effective contact between gas molecules and the cold end surface, thereby improving the sufficiency of organic component separation. This application can also utilize the treated low-temperature exhaust gas to pre-cool the exhaust gas to be treated, so that the pressurized and heated exhaust gas to be treated can obtain a certain degree of pre-cooling before entering the condensation separation box. This causes the exhaust gas to lower its own temperature in advance while the water in the exhaust gas is liquefied and precipitated at low temperature, which effectively improves the speed and efficiency of subsequent cooling to the precipitation temperature. It can also reduce the humidity of the exhaust gas, making it easier to carry out combustion treatment. The secondary pre-treatment and cooling of the exhaust gas can improve the secondary utilization of energy consumed during exhaust gas treatment, thereby improving the utilization rate and energy saving effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a preferred waste gas recovery device for a coating production line proposed in this utility model;

[0017] Figure 2 This is a plan view of a preferred heat exchange column of a coating production line exhaust gas recovery device proposed in this utility model;

[0018] Figure 3 This is a side plan view of the pretreatment component of a preferred coating production line waste gas recovery device proposed in this utility model.

[0019] List of reference numerals

[0020] 1: Condensation Separation Box; 2: Pretreatment Components; 3: Adsorption Filter Components; 4: Exhaust Pipeline; 5: Heat Exchange Column; 11: Main Shell; 12: Top Cover; 13: Baffle Plate; 14: Slag Discharge Pipe; 111: Inlet Pipe; 112: Outlet Pipe; 113: Lower Flange; 121: Upper Flange; 122: Annular Protrusion; 131: Through Hole; 21: Inclined Tube; 22: Heat Exchange Column; 23: Diverter Pipe; 24: Manifold Pipe; 31: Adsorption Box; 32: Loading Basket; 33: Sealing Cover; 51: Column Shell; 52: Vertical Insulation Baffle Plate; 53: Auxiliary Heat Exchange Plate; 511: Inlet Pipe; 512: Outlet Pipe; 513: Inlet Pipe Network; 514: Outlet Pipe Network. Detailed Implementation

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] The technical solutions provided by this utility model will be described in detail below with reference to the accompanying drawings and through embodiments. It should be noted that the descriptions of these embodiments are for the purpose of helping to understand this utility model, but do not constitute a limitation thereof. In some examples, because some implementation methods belong to existing or conventional technology, they are not described or are not described in detail. The serial numbers assigned to components in this document, such as "first," "second," etc., are only used to distinguish the described objects and do not have any sequential or technical meaning.

[0023] The following is a detailed explanation with reference to the accompanying drawings.

[0024] Example 1

[0025] This application provides a waste gas recovery device for a coating production line, which includes a condensation separation box 1, a pretreatment component 2, an adsorption filter component 3, an exhaust pipe 4, and a heat exchange column 5.

[0026] according to Figure 1-3In one specific embodiment, the condensation separation chamber 1 is capable of low-temperature precipitation of organic components from pre-removed paint mist and dust-laden exhaust gas under pressure. A pre-treatment component 2 for pre-cooling the input exhaust gas is connected to the input end of the separation chamber 1. An adsorption filter component 3 for adsorbing and separating residual components in the exhaust gas is also provided at the output end of the condensation separation chamber 1. An exhaust pipe 4 is connected to the output end of the adsorption filter component 3 and communicates with the heat exchange tube 22 of the pre-treatment component 2. Several heat exchange columns 5, arranged in a staggered array on the top cover 12 of the condensation separation chamber 1, are inserted to perform multiple diversions and condensation of the directionally flowing exhaust gas within the chamber cavity of the condensation separation chamber 1. The heat exchange column 5 provided in this application can effectively separate organic components in the exhaust gas through low-temperature condensation. The cold end it constructs can fully cool the exhaust gas in contact with it, thereby ensuring the separation effect and efficiency. In particular, the staggered array arrangement can divert and disturb the directional flow of exhaust gas multiple times, and also form a step-by-step cooling to a certain extent, which can improve the mobility of gas molecules in the exhaust gas and fully reduce the temperature of the exhaust gas, so as to promote the full and effective contact between gas molecules and the surface of the cold end, thereby improving the sufficiency of organic component separation. This application can also utilize the treated low-temperature exhaust gas to pre-cool the exhaust gas to be treated, so that the pressurized and heated exhaust gas to be treated can obtain a certain degree of pre-cooling before entering the condensation separation box 1. This causes the exhaust gas to lower its own temperature in advance while realizing the low-temperature liquefaction and precipitation of water in the exhaust gas, effectively improving the speed and efficiency of subsequent cooling to the precipitation temperature. It can also reduce the humidity of the exhaust gas, making it easier to carry out combustion treatment. The secondary pre-treatment and cooling of the exhaust gas can improve the secondary utilization of energy consumed during exhaust gas treatment, thereby improving the utilization rate and energy saving effect.

[0027] Preferably, the condensation separation box 1 includes a main shell 11, a top cover 12, a partition 13, and a slag discharge pipe 14. Preferably, the top cover 12 is detachably fastened to the top opening of the main shell 11, and the partition 13 is fixedly installed inside the shell cavity of the main shell 11 in a manner that divides the shell cavity into an upper chamber and a lower chamber. More preferably, a slag discharge pipe 14 for discharging the condensed substances is also inserted at the bottom of the main shell 11.

[0028] Preferably, an air inlet 111 and an air outlet 112 are respectively installed on both sides of the main housing 11. Preferably, a lower flange 113 is provided on the outer side of the main housing 11 near its top opening. Preferably, an assembly step is provided on the top opening end face of the main housing 11, and a sealing ring is embedded in the assembly step. Preferably, an upper flange 121 is provided on the outer side of the top cover 12 in a manner corresponding to the lower flange 113. Preferably, an annular protrusion 122 adapted to the assembly step is provided on the lower edge of the top cover 12. Specifically, the annular protrusion 122 is integrally formed with the top cover 12. Preferably, the upper flange 121 and the lower flange 113 are connected and positioned by inserting limiting bolts. More preferably, the upper flange 121 and the lower flange 113 are both connected to the top cover 12 and the main housing 11 by welding or integral forming, respectively. A plurality of heat exchange inserts 5, capable of extending into the upper chamber of the main housing 11, are inserted into the top cover 12 in a staggered array. Preferably, the heat exchange inserts 5 can be sealed and inserted into the top cover 12 by welding. Preferably, a plurality of through holes 131 are provided on the partition plate 13 in a staggered array in the same manner as the heat exchange inserts 5, so that the axial lower end of the heat exchange inserts 5 penetrates the partition plate 13 and extends into the lower chamber of the main housing 11. Preferably, the through holes 131 are formed such that their cavity cross-section is larger than the column cross-section of the heat exchange insert 5. Preferably, a notch is provided on the side of the partition plate 13 near the air inlet to facilitate the falling and discharge of liquid water. Preferably, a manual switch valve is also provided at the lower end of the slag discharge pipe 14 to limit the opening and closing of its cavity. This application inserts several heat exchange columns 5 in a staggered array inside the main housing 11, so that the condensation column formed by the heat exchange columns 5 can exchange heat with the exhaust gas to reduce the temperature of the exhaust gas, while diverting the directional flow of exhaust gas, improving the mobility of the exhaust gas and the sufficiency of heat exchange, so that the organic components in the exhaust gas can be reduced to below -30°C and condensed and precipitated, ensuring the effectiveness and sufficiency of the precipitation of organic matter.

[0029] Preferably, the inclined lower end outlet of the inclined tube 21 of the pretreatment component 2 is connected to the air inlet 111 of the main housing 11. Preferably, heat exchange tubes 22, separated from the tube cavity, are inserted at intervals on the inclined tube wall of the inclined tube 21. More preferably, the axial lower end and axial upper end of multiple parallel heat exchange tubes 22 are respectively connected to a branch pipe head 23 and a manifold head 24. Preferably, the tube shell of the heat exchange tube 22 inside the inclined tube 21 is made of a corrosion-resistant and highly thermally conductive thin-walled stainless steel material, and its surface is coated with a non-stick, corrosion-resistant, and highly heat-permeable film to improve condensation efficiency and anti-clogging performance. This application, by setting an inclined tube body 21 with an inclined cavity, enables the pre-cooling process to liquefy water vapor introduced during the pre-washing process or present in the exhaust gas at low temperature, separating it from the airflow. The separated water can then flow into the main casing 11 for recycling and discharge, effectively reducing the water content of the exhaust gas. This facilitates the subsequent precipitation of organic matter in the exhaust gas under ultra-low temperature conditions, preventing water vapor from freezing and hindering the condensation process. Furthermore, the dehydrated exhaust gas reduces the loss of adsorption media such as activated carbon during subsequent adsorption filtration. In addition, when the adsorption-filtered exhaust gas needs to be combusted, the removal of moisture improves the combustibility of the exhaust gas.

[0030] Preferably, the end of the shunt pipe head 23 away from the heat exchange tube 22 is connected to the output end of the exhaust pipe 4, so as to use the low-temperature clean exhaust gas transported by the exhaust pipe 4 to pre-cool the exhaust gas to be condensed and separated, thereby reducing the temperature of the exhaust gas entering the main casing 11.

[0031] Preferably, the inclined upper inlet of the inclined tube 21 is connected to a zeolite rotor capable of pressurizing the exhaust gas containing organic components. More preferably, the input end of the zeolite rotor is connected to a water washing module such as a spray tower capable of removing paint mist and dust, thereby pre-filtering paint mist and other components through the water washing module. More preferably, the water washing module is connected to the spraying chamber via a suction fan, so that the exhaust gas in the spraying chamber can be directionally output under the action of the induced draft fan. Preferably, the induced draft fan can be an OER300A type negative pressure airflow fan. Preferably, the water washing module can refer to the spray tower structure in the existing patent with patent number CN211098169U. Preferably, the zeolite rotor can be a honeycomb ceramic-based zeolite rotor from Qingdao Nabco Environmental Protection, with its input and output ends connected to the water washing module and the inclined tube 21, respectively. This honeycomb ceramic-based zeolite rotor has a concentration ratio of 20:1. Its structure uses ceramic fiber as the substrate, coated with hydrophobic zeolite to form a honeycomb rotor. Its condensation advantage is that it can concentrate low-concentration waste gas (<800ppm) into a high-concentration gas stream (>10g / m³). 3This meets the high-efficiency precipitation threshold of the condensation method. Operating parameters: rotor speed 1-6 rpm, desorption temperature 180-230℃, and the volume of the concentrated exhaust gas is reduced to 5%-10% of the original volume.

[0032] Preferably, a combustion tower is also connected to the output end of the manifold 24, thereby enabling the high-altitude discharge of filtered clean exhaust gas and the end-of-pipe combustion treatment of exhaust gas requiring tail gas combustion using the combustion tower. The combustion tower provided in this application is a conventional modular product, capable of treating residual components through RTO incineration to achieve compliant emissions. As a conventional technical means, and given that this application clearly specifies the connection and relative position of its gas input pipeline to the manifold 24, its internal structure will not be described in detail further. Relevant personnel can directly select the finished modular equipment according to their needs.

[0033] Preferably, the adsorption filtration assembly 3 includes an adsorption box 31, a receiving basket 32, and a sealing cover 33. Preferably, the receiving basket loaded with activated carbon is placed in the adsorption box 31 to fit the inner cavity of the adsorption box 31, and the top opening of the adsorption box 31 is detachably fitted with a sealing cover 33 that can cooperate with it to form a sealed cavity. Preferably, the sealing cover 33 is fastened to the adsorption box 31 in a manner that covers the opening of the adsorption box 31. Preferably, a sealing ring is embedded in the sealing cover 33 to fill the assembly gap between it and the adsorption box 31. Preferably, both the sealing cover 33 and the outer side of the adsorption box 31 are provided with flanges, thereby limiting their position using bolts that pass through the flanges. Preferably, both ends of the adsorption box 31 are provided with pipe openings with flanges, thereby enabling the adsorption box 31 to be sealed and connected to the output end of the main housing 11 and the input end of the exhaust pipe 4. Specifically, because the condensation structure can precipitate most organic components, the amount of residual organic matter to be adsorbed in the waste gas is relatively small. Therefore, compared to the conventional adsorption box 31 which requires periodic activated carbon replacement every 7-14 days, this application allows setting the activated carbon replacement cycle in the adsorption box 31 to 30 days. Operators can then replace the activated carbon in the adsorption box 31 monthly. The saturation period of the activated carbon is defined by the testers based on experimental data obtained from previous tests; therefore, subsequent timing and periodic replacement can be done manually.

[0034] Preferably, a vertical heat-insulating baffle 52 is inserted into the shell 51 of the heat exchange column 5 to divide the cylindrical shell cavity, thereby forming a U-shaped evaporation tube cavity that can limit the directional flow of the cooling medium. More preferably, auxiliary heat exchange fins 53 that can promote heat transfer are laid on the shell wall of the shell 51. Preferably, a protective sleeve covering the auxiliary heat exchange fins 53 can also be provided on the outside of the shell 51. Preferably, the shell 51 is made of a high thermal conductivity metal material such as copper or aluminum. Preferably, the protective sleeve is made of a corrosion-resistant and high thermal conductivity thin-walled stainless steel material, and its surface is coated with a non-stick, corrosion-resistant and high heat-transmitting film to improve condensation efficiency and anti-clogging performance, such as nano-ceramic coating or metal-based composite material, which can accelerate the transfer of cold energy, shorten the condensation time of exhaust gas components, especially effective for low boiling point VOCs, and reduce the retention of droplets on the surface of the column, allowing the condensate to slide off quickly and preventing the liquid film from thickening to form a heat insulation layer. It effectively prevents easily adhering components such as resin and wax in the coating exhaust gas from accumulating on the condenser surface, which would lead to increased thermal resistance and a decrease in efficiency of over 30%. The low-adhesion film layer can reduce residue accumulation by more than 90%. Compared with traditional stainless steel surfaces that require weekly shutdown for cleaning, the condenser column coated with fluorine-modified coating can run continuously for 6 months without scaling or clogging, greatly improving the continuous condensation capacity.

[0035] Preferably, the auxiliary heat exchange plate 53 can be a YKLFE158D type semiconductor heat sink, which can be connected to an external power supply through a wire passing through the gap space between the cylindrical shell 51 and the protective shell, enabling it to perform directional heat transfer. Specifically, by constructing an ultra-low temperature refrigeration system, this application allows the hot end temperature of the auxiliary heat exchange plate 53 to be maintained below zero, thereby enabling its cold end to quickly and effectively reach and maintain a low temperature below -30°C, thus enabling effective condensation and liquefaction of toluene-like organic compounds. Specifically, the semiconductor heat sink provided in this application has a specific power, so that when it is operated by manually closing the electrical circuit, it operates at a fixed full power state, enabling it to effectively transfer heat and effectively form an ultra-low temperature state at the cold end, thereby fully liquefying and condensing the organic compounds. More preferably, the cold end of the semiconductor cooling plate can also be equipped with a wireless temperature sensing unit, and the liquid cooling circuit of the refrigeration system also has a sensing unit, and is connected to a uniform controller and a PLC module, thereby using a controller with an integrated PID temperature control algorithm to prevent temperature fluctuations.

[0036] Preferably, the top surface of the cylindrical shell 51 is fitted with an inlet pipe head 511 and an outlet pipe head 512, which can communicate with the two side chambers separated by the vertical heat insulation partition 52, respectively. More preferably, the inlet pipe heads 511 of the cylindrical shells 51 arranged in an array are connected through an inlet pipe network 513, and the outlet pipe heads 512 of the cylindrical shells 51 arranged in an array are connected through an outlet pipe network 514. More preferably, the port of the inlet pipe network 513 away from the cylindrical shell 51 and the port of the outlet pipe network 514 away from the cylindrical shell 51 are respectively connected to the output end and input end of the cooling medium circulation module, thereby forming a closed loop, so as to continuously supply low-temperature cooling medium using the cooling medium circulation module. Specifically, the heat exchange plug 5 is equivalent to the evaporator of a refrigeration system that uses a compressor for condensation. Therefore, the heat exchange plug 5, which serves as the evaporator module, is connected to a dryer filter via an inlet pipe network 513 to directionally input the low-temperature cooling medium. The heat exchange plug 5 is also connected to a gas-liquid separator via an outlet pipe network 514 to directionally output the cooled medium after heat absorption. Specifically, the refrigeration system can cyclically cool the cooling medium. To meet the cryogenic requirements of non-water-soluble solvents such as toluene and xylene below -30°C, the refrigeration system of this application, which forms a circulating cooling loop in conjunction with the heat exchange plug 5, can utilize a cryogenic scroll compressor refrigeration system with patent number CN218565798U. During assembly, only the evaporator and heat exchange plug 5 in the existing patent need to be replaced, and the inlet and outlet pipes connecting the refrigeration system to the evaporator are sealed and connected to the ports of the outlet pipe network 514 and the inlet pipe network 513 to form a cryogenic ultra-low temperature cooling system.

[0037] Preferably, the vertical heat insulation partition 52 does not completely isolate the column shell 51, so that the bottom of the column shell 51 has a connecting area to form an evaporation tube cavity with a U-shaped cross section. This allows the cooling medium flowing into the column shell 51 to fully exchange heat with the auxiliary heat exchange plate 53 through the shell wall before flowing out in a directional manner. This enables the cooling medium to continuously and directionally flow in the column shell 51 and fully cool the shell cavity of the main box shell 11 to a cryogenic low temperature state that meets the requirements for the condensation and precipitation of organic components.

[0038] Preferably, the auxiliary heat exchange plate 53, refrigeration system, ignition system and sensing and monitoring system of combustion tower, zeolite rotor, water washing module, induced draft fan and other electrical components involved in this application are all electrically connected to the controller and power supply. The control method of this application is controlled by the controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, this utility model is only used to protect the mechanical device and its mechanical structural features. Therefore, this utility model will not explain the control method and circuit connection in detail.

[0039] For surface connections between components not explicitly specified in this application, conventional bolt connections, snap-fit ​​connections, or fixed connections such as welding can be used. As these are conventional connection methods, this application will not elaborate further on this part. Specifically, the connecting ends of the assembled components all form flange structures, and the two flange structures are connected by bolts, gaskets, or other structures.

[0040] This utility model is not limited to the above-described optional embodiments. Anyone can derive other various forms of products under the guidance of this utility model. However, regardless of any changes in shape or structure, any technical solution falling within the scope of the claims of this utility model is within the protection scope of this utility model. Those skilled in the art should understand that this utility model specification and its drawings are illustrative and do not constitute a limitation on the claims. The protection scope of this utility model is defined by the claims and their equivalents. Throughout the text, features introduced by "preferred" are merely optional and should not be construed as mandatory. Therefore, the applicant reserves the right to abandon or delete relevant preferred features at any time.

Claims

1. A waste gas recovery device for a coating production line, characterized in that, The system includes a condensation separation box (1) capable of low-temperature precipitation of organic components in exhaust gas, and a pretreatment component (2) for precooling the input exhaust gas connected to the input end of the separation box (1). The output end of the condensation separation box (1) is also equipped with an adsorption filter component (3) capable of adsorbing and separating residual components in the exhaust gas. The output end of the adsorption filter component (3) is connected to an exhaust pipe (4) that is connected to the heat exchange tube (22) of the pretreatment component (2). Several heat exchange columns (5) are inserted on the top cover (12) of the condensation separator (1) in a staggered array arrangement, which can perform multiple diversions and condensation of the exhaust gas flowing directionally in the chamber of the condensation separator (1).

2. The waste gas recovery device for a coating production line as described in claim 1, characterized in that, The condensation separator (1) includes a main shell (11), a top cover (12), a partition (13), and a slag discharge pipe (14), wherein, The top opening of the main housing (11) is detachably fitted with a top cover (12), and a partition (13) is installed inside the cavity of the main housing (11). A slag discharge pipe (14) is also inserted at the bottom of the main housing (11).

3. The waste gas recovery device for a coating production line as described in claim 2, characterized in that, The main housing (11) is fitted with an air inlet (111) and an air outlet (112) on both sides respectively. A lower flange edge (113) is provided on the outer side of the main housing (11).

4. The waste gas recovery device for a coating production line as described in claim 3, characterized in that, An upper flange edge (121) is provided on the outer side of the top cover (12) in a manner corresponding to the lower flange edge (113); an annular protrusion (122) is provided on the lower edge of the top cover (12). Several heat exchange plugs (5) capable of extending into the main housing (11) are inserted into the top cover (12) in a staggered array.

5. The waste gas recovery device for a coating production line as described in claim 4, characterized in that, Several through holes (131) are provided on the plate body of the partition (13) in a staggered array in the same manner as the heat exchange plugs (5).

6. The waste gas recovery device for a coating production line as described in claim 5, characterized in that, A vertical heat-insulating baffle (52) capable of dividing the cylindrical shell cavity is inserted into the shell (51) of the heat exchange plug (5) to form a U-shaped evaporation tube cavity capable of limiting the directional flow of the cooling medium, and auxiliary heat exchange plates (53) are laid on the shell wall of the shell (51).

7. The waste gas recovery device for a coating production line as described in claim 6, characterized in that, The inclined lower end outlet of the inclined tube (21) of the pretreatment component (2) is connected to the air inlet (111) of the main housing (11). Heat exchange tubes (22) that are separated from the lumen are inserted at intervals on the inclined tube wall of the inclined tube body (21), and the lower and upper ends of the multiple heat exchange tubes (22) connected in parallel are respectively connected to a shunt tube head (23) and a manifold head (24).

8. The waste gas recovery device for a coating production line as described in claim 7, characterized in that, The end of the shunt tube (23) away from the heat exchange tube (22) is connected to the output end of the exhaust pipe (4).

9. The waste gas recovery device for a coating production line as described in claim 8, characterized in that, The adsorption filtration assembly (3) includes an adsorption box (31), a receiving basket (32), and a sealing cover (33), wherein, The basket containing activated carbon is placed in the adsorption box (31) in a manner that fits into the inner cavity of the adsorption box (31), and the top opening of the adsorption box (31) is detachably fitted with a sealing cover (33) that can cooperate with it to form a sealed cavity.

Images