A paint spraying waste gas treatment device

Abstract

The present invention discloses a paint spraying waste gas treatment device, which, along the waste gas treatment path, comprises a pretreatment module, an adsorption module, a catalytic module and an exhaust module that are detachably connected in sequence; wherein, the detachable connection between the modules is realized through matching connecting flanges; the adsorption module includes a plurality of activated carbon beds, and at the flow-through positions of the intake chamber and the outlet chamber formed by partitioning the activated carbon beds, a carbon bed with a desorption passage is configured; among two adjacent activated carbon beds, the outlet chamber of the activated carbon bed on the upstream side can be communicated with the intake chamber of the activated carbon bed on the downstream side through a switching valve; the catalytic combustion furnace of the catalytic module is communicated with the desorption outlets of the plurality of activated carbon beds through a desorption outlet pipeline, the discharge outlet of the catalytic combustion furnace can be respectively communicated with an exhaust stack and a gas mixer, and the outlet of the gas mixer is communicated with the desorption inlet of the activated carbon bed through a desorption inlet pipeline. Through the optimization of the overall machine structure, this solution can effectively balance the system operation cost and the applicable range of working conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment, and particularly to a painting waste gas treatment device. Background Art

[0002] With the continuous strengthening of environmental protection efforts, effectively controlling the emission of VOCs pollutants has become a technical difficulty generally concerned in the waste gas treatment industry. As is well known, the organic waste gas purification technologies that have been successfully applied in industrial production mainly include adsorption method, absorption method, condensation method, membrane separation method, biochemical method, low-temperature plasma method, photocatalytic oxidation method and combustion method. Due to the large volume, low concentration, complex composition of industrial organic waste gas and the presence of particulate pollutants at the same time, using a single treatment technology has problems such as large equipment investment, high operation cost and low purification efficiency. Therefore, combined treatment process technologies have emerged.

[0003] For example, adsorption concentration + catalytic combustion method. This combined treatment process uses activated carbon to adsorb and concentrate low-concentration VOCs waste gas, uses a catalytic oxidation furnace to burn the high-concentration organic waste gas generated by concentration, and finally uses the waste heat generated by combustion to desorb and regenerate the activated carbon, achieving effective treatment of VOCs and reducing energy consumption at the same time. Limited by the whole machine transportation, the existing integrated adsorption concentration + catalytic combustion equipment cannot fully meet the large-volume treatment requirements; in addition, in actual situations, the concentration of waste gas often fluctuates. If the waste gas concentration suddenly increases, the current technical solutions cannot completely purify the waste gas, resulting in unqualified emissions.

[0004] In view of this, it is urgent to optimize the design of the existing painting waste gas treatment device to improve the applicable range of the equipment on the basis of effectively controlling the system operation cost. Summary of the Invention

[0005] To solve the above technical problems, the present invention provides a painting waste gas treatment device, which can effectively balance the system operation cost and the applicable range of working conditions through the optimization of the whole machine structure.

[0006] The paint spraying waste gas treatment device provided by the present invention includes, along the waste gas treatment path, a pretreatment module, an adsorption module, a catalytic module, and an exhaust module that are detachably connected in sequence; wherein, the pretreatment module is used to pre-treat the particulate matter contained in the waste gas, the adsorption module includes a plurality of activated carbon beds, the activated carbon beds have an intake chamber and an outlet chamber formed by partitioning, and a carbon bed with a desorption passage is configured at the through-flow position between the intake chamber and the outlet chamber, the adsorption inlet of the intake chamber is communicated with the pre-treated waste gas outlet of the pretreatment module through an adsorption inlet pipe, and the adsorption outlet of the outlet chamber is communicated with an exhaust pipe through an adsorption outlet pipe; wherein, among two adjacent activated carbon beds, the outlet chamber of the activated carbon bed on the upstream side can be communicated with the outlet chamber of the activated carbon bed on the downstream side through a switching valve; the catalytic module includes a catalytic combustion furnace and a gas mixer arranged in sequence; the catalytic combustion furnace is communicated with the desorption outlets of a plurality of the activated carbon beds through a desorption outlet pipe, the discharge outlet of the catalytic combustion furnace can be respectively communicated with the exhaust pipe and the gas mixer, and the outlet of the gas mixer is communicated with the desorption inlets of a plurality of the activated carbon beds through a desorption inlet pipe; the exhaust module includes the exhaust pipe; wherein, the detachable connection between the modules is realized through matching connecting flanges.

[0007] Preferably, the desorption inlet pipe is also communicated with the dehumidified gas pipe of the pretreatment module.

[0008] Preferably, the pretreatment module includes a gas-solid mixer and a dust collector arranged in sequence; the gas-solid mixer is communicated with the waste gas source inlet of the pretreatment module to mix the waste gas and lime powder; a stone powder storage is arranged below the dust collector to collect the waste gas particulate matter filtered by the dust collector; the pre-treated waste gas outlet is located above the dust collector.

[0009] Preferably, the pretreatment module has a tubular frame, and the dehumidified gas pipe is formed in the tubular frame.

[0010] Preferably, the activated carbon bed is configured to form the intake chamber and the outlet chamber by partitioning with a partition wall, and multiple layers of the carbon beds are arranged at intervals on the desorption passage, and a tubular support is arranged at the bottom of each layer of the carbon bed, and the tubular support forms a part of the desorption inlet pipe communicated with the desorption inlet.

[0011] Preferably, the adsorption inlet of the intake chamber and the adsorption outlet of the outlet chamber are both connected to a collection valve chamber outside the activated carbon bed. The collection valve chamber has two interfaces respectively connected to the adsorption inlet pipe and the adsorption outlet pipe, and the opening directions of the first interface and the second interface are perpendicular to each other. A "T"-shaped valve plate is arranged in the collection valve chamber. The "T"-shaped valve plate is hinged to the side wall of the valve chamber to switch between a connected working position and a cut-off working position, and is configured as follows: for the "T"-shaped valve plate in the cut-off working position, its horizontal plate blocks the first interface or the second interface, and its vertical plate separates the adsorption inlet and the adsorption outlet; for the "T"-shaped valve plate in the connected working position, its horizontal plate separates the adsorption inlet and the adsorption outlet, and its vertical plate blocks and separates the first interface and the second interface.

[0012] Preferably, the adsorption inlet pipe, the adsorption outlet pipe, the desorption inlet pipe, and the desorption outlet pipe are formed by being separated by a single pipe. The main body of the pipe is arranged along the waste gas treatment path and is configured as follows: an inward concave step surface is formed at the docking position with the catalytic module, and the interfaces of the desorption inlet pipe and the desorption outlet pipe are located on the inward concave step surface; a vertically extending vertical pipe section is formed at the docking position with the exhaust module, and the interface of the adsorption outlet pipe is located on the pipe wall of the vertical pipe section.

[0013] Preferably, a flow guiding orifice plate is arranged on the upstream side of the adsorption material of the carbon bed.

[0014] Preferably, the pretreatment module further includes a powder spraying machine arranged between the dust collector and the gas-solid mixer.

[0015] Preferably, the catalytic combustion furnace of the catalytic module is integrated with a heat exchanger. The desorption outlet pipe is connected to the inlet of the catalytic combustion furnace through the heat exchange path of the heat exchanger. The outlet of the catalytic combustion furnace is connected to the inlet of the heat source path of the heat exchanger, and the outlet of the heat source path forms the discharge port of the catalytic combustion furnace.

[0016] Preferably, the adsorption outlet pipe is connected to the exhaust stack through a main fan arranged in the exhaust module. The desorption outlet pipe is connected to the heat exchanger through a desorption fan arranged in the catalytic module. A cold supplement fan is arranged at the air supplement port of the gas mixer; the outlet of the gas mixer can also be connected to the upstream end path of the desorption fan.

[0017] Preferably, the exhaust stack includes multiple detachably connected barrel bodies, and the bottom barrel body at the bottom is hinged to the bottom bracket of the exhaust module to switch between an erected working position and a transportation working position.

[0018] Preferably, the bottom of the body of each module adopts a uniformly distributed load structure, and lifting lugs are arranged on the body of each module.

[0019] Compared with the prior art, the present invention creatively proposes a painting waste gas treatment device with a whole machine modularization. The modules are detachably connected through matching connecting flanges. The whole device has the characteristics of high integration, compact structure and small floor area. This solution adopts a modular design, which can be assembled and adapted based on different treatment air volumes. At the same time, on the basis of being convenient for transportation, it is easy to carry out maintenance. Among them, in two adjacent activated carbon beds of the adsorption module, the air outlet cavity of the activated carbon bed on the upstream side can be communicated with the air inlet cavity of the activated carbon bed on the downstream side through a switching valve. Thus, a structure for switching between series and parallel connections of each carbon bed can be realized. In the parallel mode, the purification efficiency of the system can be improved. In the operating condition where the waste gas concentration suddenly increases, the activated carbon bed can be switched to the series mode to ensure compliance with emissions through multi-stage adsorption, so as to meet different operating conditions. Among them, the catalytic combustion furnace exhaust outlet of the catalytic module can be respectively communicated with the exhaust pipe and the gas mixer. The outlet of the gas mixer is communicated with the desorption inlet of the activated carbon bed through a desorption inlet pipe. In this way, part of the treated high-temperature gas can be reused as the high-temperature desorption gas of the activated carbon bed, which can further reduce the desorption operation cost of the system. This part of the high-temperature gas is mixed with the outside air through the gas mixer to cool down, which can completely avoid the problem of spontaneous combustion of activated carbon caused by too high temperature.

[0020] In the preferred solution of the present invention, the desorption inlet pipe is also communicated with the dehumidification gas pipe of the pretreatment module. That is to say, in addition to being used as the high-temperature desorption gas of the activated carbon bed, the high-temperature gas discharged from the catalytic module can also be used to reduce the relative humidity of the waste gas at the pretreatment module. With such a setting, the heat loss can be further reduced, the heat energy of the system is fully utilized, and thus the energy utilization efficiency is effectively improved.

[0021] In another preferred solution of the present invention, the tubular frame of the pretreatment module is used to construct the dehumidification gas pipe; the tubular support at the bottom of each layer of the carbon bed of the adsorption module is used to form part of the desorption inlet pipe communicated with the desorption inlet. With such a setting, the body structure of the module is used to construct the corresponding medium pipe, which is more compact in structure and lower in cost on the basis of meeting the product treatment function. On the other hand, the tubular frame is used to provide pretreatment dehumidification gas, and multi-layer desorption is realized by using the tubular supports at the bottoms of multiple layers of carbon beds, so that the distribution of gas is relatively uniform, and the desorption and dehumidification effects of the system can be further improved.

[0022] In yet another preferred embodiment of the present invention, both the adsorption inlet and the adsorption outlet of the activated carbon bed are connected to an external collecting valve chamber. A "T"-shaped valve plate that can be switched between a connected working position and a cut-off working position is provided in the collecting valve chamber. Specifically, when in the cut-off working position, its horizontal plate blocks the first interface connecting the adsorption inlet pipe or the second interface of the adsorption outlet pipe, and its vertical plate separates the adsorption inlet and the adsorption outlet. At this time, both paths are in a non-conductive state; when in the connected working position, its horizontal plate separates the adsorption inlet and the adsorption outlet, and its vertical plate blocks and separates the first interface and the second interface. At this time, the two paths are respectively in a conductive state. With such a setting, this solution combines the adsorption inlet and the adsorption outlet and uses a single "T"-shaped valve plate for control, reducing the number of valves, making the system easier to maintain, and reducing the system leakage rate.

[0023] In still another preferred embodiment of the present invention, the adsorption inlet pipe, the adsorption outlet pipe, the desorption inlet pipe, and the desorption outlet pipe are formed by being separated by a single pipe. That is to say, the adsorption pipes of this integrated machine adopt a co-pipe structure, simplifying the pipeline layout; on the basis of further improving the equipment integration, the pipe length can be shortened, effectively reducing the system heat loss and the volume of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic flow chart of the spray painting waste gas treatment device described in the specific embodiment;

[0025] Figure 2 It is a front view of the spray painting waste gas treatment device described in the specific embodiment;

[0026] Figure 3 It is a rear view of the spray painting waste gas treatment device described in the specific embodiment;

[0027] Figure 4 For Figure 1 the internal structure schematic diagram of the spray painting waste gas treatment device shown in

[0028] Figure 5 It is a schematic diagram of the assembly relationship of the connecting flanges between modules of the spray painting waste gas treatment device described in the specific embodiment;

[0029] Figure 6 It is a bottom view of the spray painting waste gas treatment device described in the specific embodiment;

[0030] Figure 7 It is a schematic diagram of the structure of the pretreatment module described in the specific embodiment;

[0031] Figure 8 It is a schematic diagram of the structure of the activated carbon bed described in the specific embodiment;

[0032] Figure 9Schematic diagram of the structure of the tubular stent described in the specific implementation manner;

[0033] Figure 10 Schematic diagram of the structure of the flow guiding orifice plate described in the specific implementation manner;

[0034] Figure 11 Overall structure schematic diagram of the integrated pipeline described in the specific implementation manner;

[0035] Figure 12 is Figure 11 View A of;

[0036] Figure 13 is Figure 12 Sectional view taken along line B - B of;

[0037] Figure 14 Shows the position switching process diagram of the "T"-shaped valve plate described in the specific implementation manner;

[0038] Figure 15 Shows the schematic diagram of the hinge relationship between the bottom section cylinder and the bottom bracket described in the specific implementation manner.

[0039] In the figure:

[0040] Pretreatment module 10, gas - solid mixer 11, dust collector 12, stone powder storage 13, powder sprayer 14, tubular frame 15, waste gas source inlet 101, pretreatment waste gas outlet 102, dehumidified gas pipeline 103;

[0041] Adsorption module 20, activated carbon bed 21, intake cavity 211, adsorption inlet 2111, outlet cavity 212, adsorption outlet 2121, carbon bed 213, flow guiding orifice plate 2131, adsorption inlet pipeline 214, adsorption outlet pipeline 215, switch valve 216, tubular support 217, desorption inlet 218, desorption outlet 219, collection valve cavity 22, first interface 221, second interface 222, "T"-shaped valve plate 23, horizontal plate 231, vertical plate 232;

[0042] Catalytic module 30, catalytic combustion furnace 31, gas mixer 32, desorption outlet pipeline 33, desorption inlet pipeline 34, heat exchanger 35, cold - supplement fan 36, desorption fan 37;

[0043] Exhaust module 40, exhaust stack 41, bottom section cylinder 411, bottom bracket 412, main fan 42;

[0044] Connecting flange 50, uniformly distributed load structure 60, pipeline 70, concave step surface 701, vertical pipe section 702. Specific implementation manner

[0045] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] Without loss of generality, in this embodiment, the paint spraying waste gas treatment device shown in the figure is used as the description subject to detail the overall machine modular improvement solution proposed by the present application. During the working process, the waste gas sequentially passes through the pretreatment module, adsorption module, catalytic module, and exhaust module to complete the waste gas treatment and discharge it into the atmosphere.

[0047] Please refer to Figures 1 - 4 , in which, Figure 1 is the process schematic diagram of the paint spraying waste gas treatment device described in this embodiment, Figure 2 and Figure 3 are the front view and rear view of the paint spraying waste gas treatment device respectively, Figure 4 showing the internal structure of the paint spraying waste gas treatment device.

[0048] The paint spraying waste gas treatment device provided by this solution adopts an overall machine modular design. As shown in the figure, along the waste gas treatment path, it includes a pretreatment module 10, an adsorption module 20, a catalytic module 30, and an exhaust module 40 that are detachably connected in sequence. During the treatment process, the jet waste gas enters the pretreatment module 10 to pre-treat the particulate matter contained in the waste gas to reduce the content of particulate matter in the waste gas and avoid blocking the subsequent adsorption module 20; then, the pre-treated waste gas enters the adsorption module 20, and the purified gas is discharged from the exhaust module 40, and its desorbed waste gas enters the catalytic module 30 for treatment; next, the treated high-temperature gas can be used as the high-temperature desorption gas of the adsorption module 20, or as the dehumidification gas for reducing the relative humidity of the waste gas in the pretreatment module 10. Of course, it can also be directly discharged through the exhaust module 40 according to the actual situation.

[0049] The detachable connection between the modules is realized through matching connecting flanges. The overall device has the characteristics of high integration, compact structure, and small floor area; it is assembled and adapted based on different treatment air volumes, and has good adaptability. At the same time, on the basis of being convenient for transportation, it is easy to carry out maintenance. Specifically, please refer to Figure 5 together, which shows the assembly relationship of the connecting flange 50 between the modules. The connecting flange 50 shown in the figure is located inside the module. It should be understood that the connecting flange 50 can also be set outside the module according to actual needs, as long as it can quickly achieve accurate docking between the modules and is fixed with threaded fasteners, it is within the scope of protection requested by the present application.

[0050] It should be noted that the bottom of the body of each of the above modules preferably adopts a uniform load structure 60 to reduce the cost of civil engineering and effectively reduce the site placement requirements of the device. Please refer to Figure 6, this figure is the bottom view of the paint spraying waste gas treatment device described in this embodiment. Here, the uniform load structure 60 can adopt different structural forms, such as but not limited to the longitudinal stiffeners shown in the figure. Obviously, on the basis of not significantly increasing the manufacturing cost, any structure that can meet the functional requirement of uniform bottom load is acceptable.

[0051] For the convenience of splicing, hoisting and transportation of each module of the device, lifting lugs (not shown in the figure) can also be respectively arranged on the body of each module, which can greatly reduce the workload and cost of on-site construction and commissioning, save the construction period, and the later operation and maintenance cost.

[0052] Among them, the pretreatment module 10 for pre-treating the particulate matter contained in the waste gas can select different forms of pretreatment according to specific working conditions. Such as but not limited to Figure 7 the preferred scheme shown.

[0053] The pretreatment module 10 is a frame structure, including a gas-solid mixer 11 and a dust collector 12 arranged in sequence; the gas-solid mixer 11 is communicated with the waste gas source inlet 101 of the pretreatment module 10 to fully mix the waste gas to be treated with lime powder, so as to reduce the viscosity of the paint mist and the humidity of the waste gas; then the particulate matter in the waste gas is filtered by the dust collector 12. The dust collector 12 can preferably be provided with several low-temperature bag / filter cartridge dust collectors, and the dust collectors are configured with pulse cleaning devices for dust cleaning; a stone powder storage 13 is arranged below the dust collector 12, and the stone powder storage 13 is communicated with the dust collector 12 to collect the waste gas particulate matter filtered by the dust collector 12; the pretreated waste gas enters the adsorption path of the adsorption module 20 through the pretreatment waste gas outlet 102 located above the dust collector 12.

[0054] The pretreatment technology in this solution utilizes the dehumidification and adhesion effects of lime powder, which can effectively reduce the paint mist content and water vapor content of the paint spraying waste gas entering the activated carbon adsorption system, greatly reduce the replacement frequency of dry filtering materials, and has the characteristics of high efficiency and low consumption. The lime powder in the pretreatment module 10 can also be further recycled. As Figure 1 and Figure 7 shown, the pretreatment module 10 further includes a powder spraying machine 14 arranged between the dust collector 12 and the gas-solid mixer 11. The powder spraying machine 14 preferably uses a circulating pump to provide power to recycle lime powder and reduce the operation cost.

[0055] Specifically, the framework structure of the pretreatment module 10 can adopt a tubular framework 15, such as but not limited to using square tube profiles. Besides serving as the support of the equipment, it can also be used as the channel for the dehumidified gas. That is to say, the dehumidified gas pipeline 103 of the pretreatment module 10 can be formed in the inner cavity of the tubular framework 15. Specifically, the dehumidified gas interface is connected to the corresponding square tube skeleton, and several outlet air ports (not shown in the figure) are opened on the corresponding square tube skeleton, so as to achieve the effect of uniform air distribution, and further improve the dehumidification effect of the pretreatment. Thus, using the tubular framework 15 to construct the dehumidified gas pipeline 103, on the basis of meeting the product processing function, the structure is more compact and the cost is lower.

[0056] Among them, the adsorption module 20 for adsorbing and concentrating low-concentration waste gas includes a plurality of activated carbon beds 21. Each activated carbon bed 21 has adsorption inlets and outlets and desorption inlets and outlets, and an intake cavity 211 and an outlet cavity 212 are formed by internal partitioning. Specifically, a carbon bed 213 with a desorption passage is arranged at the flow-through position between the intake cavity 211 and the outlet cavity 212. The adsorption inlet 2111 of the intake cavity 211 is connected to the pretreatment waste gas outlet 102 of the pretreatment module 10 through an adsorption inlet pipeline 214, and the adsorption outlet 2121 of the outlet cavity 212 is connected to the exhaust stack 41 through an adsorption outlet pipeline 215. The gas purified by the activated carbon bed 213 through the desorption passage is discharged from the exhaust stack 41.

[0057] Combined with Figure 1 As shown, in two adjacent activated carbon beds 21, the outlet cavity 211 of the activated carbon bed 21 on the upstream side can be connected to the intake cavity 212 of the activated carbon bed 21 on the downstream side through a switching valve 216. With such a setting, a structure for switching between series and parallel connections of each carbon bed can be realized. In the parallel mode where the switching valve 216 is cut off and conducted, the purification efficiency of the system can be improved. When there is a large fluctuation in the waste gas concentration, in the operating condition where the waste gas concentration suddenly increases, the switching valve 216 can be opened and conducted. At this time, each activated carbon bed 21 switches to the series mode, and multi-stage adsorption is used to ensure that the emissions meet the standards, so as to meet different operating conditions. Of course, specifically, corresponding switching valves arranged on each desorption passage can be used to adjust the corresponding activated carbon bed 21.

[0058] Please also refer to Figure 8 , which shows the structural schematic diagram of the activated carbon bed in this solution.

[0059] It can be understood that the partitioning between the intake cavity 211 and the outlet cavity 212 in the activated carbon bed 21 can adopt different structural forms. Such as but not limited to Figure 8 the preferred example of using a partition wall for partitioning shown in. Besides partitioning to form the intake cavity 211 and the outlet cavity 212, this method divides into three interconnected regions on the left, middle, and right by a partition board, which is beneficial to the overall layout of the carbon bed 213.

[0060] To achieve better purification effect, multiple layers of carbon beds 213 may be arranged at intervals on the desorption path. A tubular support 217 is provided at the bottom of each layer of carbon bed 213. The tubular support 217 forms a partial desorption inlet pipe communicating with the desorption inlet 218. A number of air outlets 2171 are opened on the corresponding tubular support 217 to achieve the uniform distribution effect of the desorption gas of the carbon bed and improve the desorption effect. Please refer to Figure 9 , which shows a schematic structural diagram of the tubular support. For example but not limited to, the main structure of the tubular support 217 adopts a square tube profile. In addition to serving as the support of the equipment, the inner cavity of the tubular support 217 is used as the channel for the desorption gas; that is, the body structure of the module is used to construct the corresponding medium pipeline, and on the basis of meeting the product processing function, the structure is maximally compacted and the cost is reduced.

[0061] To further control the internal space occupation, a flow guiding orifice plate 2131 is arranged on the upstream side of the adsorption material of the carbon bed 213 to ensure the uniform distribution of the air flow to the adsorption material of each carbon bed 213. Compared with the traditional bell mouth form, the volume of the equipment can be effectively reduced. Please refer to Figure 10 , which shows a schematic structural diagram of the flow guiding orifice plate.

[0062] It can be understood that the number of carbon beds 213 arranged in each layer can be determined according to the equipment processing requirements. For example but not limited to, two carbon beds 213 are arranged in each layer as shown in the figure.

[0063] Among them, the catalytic module 30 for treating high-concentration organic waste gas includes a catalytic combustion furnace 31 and a gas mixer 32 arranged in sequence; specifically, the catalytic combustion furnace 31 is communicated with the desorption outlets 219 of a plurality of activated carbon beds 21 through a desorption outlet pipeline 33, and the discharge outlet of the catalytic combustion furnace 31 can be communicated with an exhaust pipe 41 so that the high-temperature gas processed by the catalytic combustion furnace 31 can be selectively discharged into the atmosphere.

[0064] Preferably, the gas mixer 32 is integrated in the desorption inlet pipeline 34, which can further improve the space utilization rate of the system. In addition, the catalytic module 30 can be integrated with an electric control system, including sensors, actuators, and a control unit. The control unit collects the required signals through the sensors, stores, analyzes and processes them, and then issues instructions to the actuators. The control unit has the functions of one-key start-stop system, large-screen data management and display, realizes real-time monitoring, management and visual analysis of data, and can flexibly set the system management permissions of different users. Through reasonable layout, the electric control system is integrated inside the all-in-one machine equipment, and at the same time, the control interface of the electric control system is set on the side of the all-in-one machine for easy operation, maintenance, debugging, and heat dissipation of the electric control system.

[0065] In addition, the outlet of the catalytic combustion furnace 31 can also be connected to the gas mixer 32. The outlet of the gas mixer 32 is connected to the desorption inlets 218 of multiple activated carbon beds 21 through the desorption inlet pipeline 34. In this way, part of the treated high-temperature gas can be reused as the high-temperature desorption gas for the activated carbon beds 21, which can further reduce the desorption operation cost of the system. This part of the high-temperature gas is mixed with the outside air through the gas mixer 32 to cool down, which can completely avoid the phenomenon of smoldering of the activated carbon in the adsorption module 20 caused by too high temperature. Preferably, a cold supplement fan 36 is provided at the air supplement port of the gas mixer 32, which can quickly supplement the outside air to reduce the temperature when the temperature of the high-temperature gas is too high, so as to ensure the safety and reliability of the reuse process.

[0066] In addition, the catalytic combustion furnace 31 of the catalytic module 30 is integrated with a heat exchanger 35. Correspondingly, the desorption outlet pipeline 33 of the catalytic module 30 is connected to the inlet of the catalytic combustion furnace 31 through the heat exchange path of the heat exchanger 35. That is, the waste gas is sent to the heat exchanger 35 for heating and then enters the catalytic combustion furnace 31 for treatment. The outlet of the catalytic combustion furnace 31 can be connected to the inlet of the heat source path of the heat exchanger 35, and the outlet of the heat source path forms the outlet of the catalytic combustion furnace 31. Thus, the treated high-temperature gas is used as the heat source of the heat exchanger 35 to heat the waste gas at the desorption outlet 219 of the activated carbon bed 21.

[0067] Here, the desorption outlet pipeline 33 is connected to the heat exchanger 35 through the desorption fan 37 provided in the catalytic module 30 to improve the treatment efficiency of high-concentration organic waste gas. In this solution, the outlet of the gas mixer 32 can also be connected to the upstream path of the desorption fan 37 to preheat the high-concentration organic waste gas to be treated entering the heat exchanger 35 with relatively lower-temperature gas.

[0068] Among them, the exhaust module 40 for completing the device emission includes the aforementioned exhaust stack 41. In order to complete the gas treatment and emission in a timely and efficient manner, the exhaust module 40 further includes a main fan 42. Figure 1 As shown, the main fan 42 is arranged in the adsorption outlet pipeline 215 and the exhaust stack 41, and can be speed-adjusted according to the emission amount of the actual working condition.

[0069] To further improve the energy utilization rate, preferably, the desorption inlet pipeline 34 is also connected to the dehumidified gas pipeline 103 of the pretreatment module 10. That is to say, in addition to being used as the high-temperature desorption gas for the activated carbon bed 21, the high-temperature gas discharged from the catalytic module 30 can also be used to reduce the relative humidity of the waste gas at the pretreatment module 10. With such a setting, the heat loss can be further reduced and the system heat energy can be fully utilized.

[0070] In addition, the pipeline integration can be further optimized. In this solution, the adsorption inlet pipeline 214, the adsorption outlet pipeline 215, the desorption inlet pipeline 33, and the desorption outlet pipeline 34 are separated by a pipeline 70. Please refer to Figures 11 - 13 , where Figure 11 is the overall structural schematic diagram of the integrated pipeline, Figure 12 is Figure 11 the view from direction A of Figure 13 is Figure 12 the sectional view taken along line B-B of

[0071] Combined with Figure 2 as shown, the main body of the pipeline 70 is arranged along the waste gas treatment path and configured as follows: an inward concave step surface 701 is formed at the docking position with the catalytic module 30, and the interfaces of the desorption inlet pipeline 33 and the desorption outlet pipeline 34 are located on the inward concave step surface 701; a vertically extending vertical pipe section 702 is formed at the docking position with the exhaust module 40, and the interface of the adsorption outlet pipeline 215 is located on the pipe wall of the vertical pipe section 702. Thus, the adsorption pipeline of this integrated machine adopts a co-pipeline structure, simplifying the pipeline layout; in addition, in order to ensure the desorption temperature, an internal insulation layer can be added to the desorption pipeline.

[0072] In this way, the design of this integrated pipeline takes into account the assembly relationship between modules, and the docking and connection of each functional pipeline can be achieved after the module assembly is completed. Combined with Figure 2 as shown, this integrated pipeline 70 is also used as the outer wall panel of the integrated machine equipment. Compared with the prior art, the equipment integration can be further improved, and the pipe length can be effectively shortened, providing good technical guarantee for reducing the system heat loss and the equipment volume.

[0073] Furthermore, this solution has further improved the valve configuration at the adsorption inlet and outlet of the activated carbon bed. Please refer to Figure 8 , the adsorption inlet 2111 of the intake cavity 211 of the activated carbon bed 21 and the adsorption outlet 2121 of the outlet cavity 212 are both connected to the collecting valve cavity 22 outside the activated carbon bed 21. The collecting valve cavity 22 has two interfaces respectively used for connecting with the adsorption inlet pipeline 214 and the adsorption outlet pipeline 215, and the opening directions of the first interface 221 and the second interface 222 are perpendicular to each other; a "T"-shaped valve plate 23 is arranged in the collecting valve cavity 22, and the "T"-shaped valve plate is hinged to the valve cavity side wall of the collecting valve cavity 22 to switch between the connected working position and the cut-off working position. Please refer to Figure 14 , which shows the position switching process diagram of the "T"-shaped valve plate.

[0074] Combined with Figure 14In the right-side illustration, the "T"-shaped valve plate 23 at the cut-off working position has its horizontal plate 231 blocking the first interface 221, and its vertical plate 232 separating the adsorption inlet 2111 and the adsorption outlet 2121. At this time, both paths are in a non-conductive state; combined with Figure 14 In the left-side illustration, the "T"-shaped valve plate 23 at the communication working position has its horizontal plate 231 separating the adsorption inlet 2111 and the adsorption outlet 2121, and its vertical plate 232 blocking and separating the first interface 221 and the second interface 222. At this time, the two paths are respectively in a conductive state. With such a setting, in this solution, the adsorption inlet 2111 and the adsorption outlet 2121 are combined and controlled by a single "T"-shaped valve plate 23, reducing the number of valves, making the system easier to maintain, and reducing the system leakage rate.

[0075] Of course, for the blocking relationship of the "T"-shaped valve plate 23, it can also be designed in such a way that when it is at the cut-off working position, its horizontal plate 231 blocks the second interface 222 (not shown in the illustration), and the functional requirement that both paths are in a non-conductive state can also be achieved.

[0076] As is well known, the split size of the module to be transported directly affects its transfer transportation. Based on the requirement of facilitating transportation, the exhaust pipe 41 of this solution can include multiple detachably connected barrel bodies to avoid the problem that the long length of the exhaust pipe 41 affects the transportation performance. Specifically, the bottom barrel body 411 at the bottom is hinged to the bottom bracket 412 of the exhaust module 40 to switch between the erected working position and the transfer working position. Please refer to Figure 15 together, which shows a schematic diagram of the hinged relationship between the bottom barrel body 411 and the bottom bracket 412.

[0077] Combined with Figure 15 As shown, the exhaust pipe 41 of this device adopts a design of segmented and the bottom barrel body 411 being hinged with a rotating shaft; that is to say, its bottom barrel body 411 is integrated on the exhaust module 40 of the device, and this section of the barrel body has the function of rotating on the vertical plane through the design of the rotating shaft; on this basis, each section of the barrel body can be provided with a docking flange (not shown in the figure). With such a setting, not only can the problem that the exhaust pipe is inconvenient to transport due to its length when integrated on the device be solved, but also the positioning and installation work of the exhaust pipe is simplified.

[0078] It should be noted that for the above-mentioned embodiments provided in this implementation manner, the specific implementation manners of its pretreatment, adsorption, and catalytic combustion modules are not the core inventive points of this application, and those skilled in the art can implement them based on the prior art, so they will not be elaborated herein.

[0079] For the all-in-one device solution described above, modular design is adopted in terms of structure, with high equipment integration, compact structure, convenient transportation, small floor area, and the function of easy maintenance can be achieved even with a small device volume. The device support adopts a uniformly distributed load structure, which can reduce the civil engineering cost and effectively reduce the requirements for site placement of the device. The device module is provided with docking flanges and lifting lugs. After the device modules are simply spliced in place with bolts, the exhaust gas source pipeline can be docked and used, eliminating on-site welding, effectively reducing the workload of on-site installation and commissioning, reducing production and construction costs and later operation and maintenance costs, and at the same time having a high purification efficiency (≥98%), with wide application value.

[0080] The above is only the preferred implementation mode of the present invention. It should be noted that for those of ordinary skill in the art of the present technology, without departing from the principle of the present invention, several improvements and retouches can be made, and these improvements and retouches should also be regarded as the protection scope of the present invention.

Claims

1. A paint spraying waste gas treatment device, characterized in that, Along the exhaust gas treatment path, including, in sequence and detachably connected: A pretreatment module for pre-treating particulate matter contained in the exhaust gas. The pretreatment module includes a gas-solid mixer and a dust collector configured in sequence. The gas-solid mixer is communicated with the exhaust gas source inlet of the pretreatment module to mix the exhaust gas with lime powder. A stone powder storage is arranged below the dust collector to collect the exhaust gas particulate matter filtered by the dust collector. The pre-treated exhaust gas outlet is located above the dust collector. The pretreatment module has a tubular frame, and a dehumidified gas pipeline is formed in the tubular frame. An adsorption module, including a plurality of activated carbon beds. The activated carbon bed has an intake chamber and an outlet chamber formed by partitioning. A carbon bed with a desorption passage is configured at the flow-through position between the intake chamber and the outlet chamber. The adsorption inlet of the intake chamber is communicated with the pre-treated exhaust gas outlet of the pretreatment module through an adsorption inlet pipeline. The adsorption outlet of the outlet chamber is communicated with the exhaust stack through an adsorption outlet pipeline. Among them, in two adjacent activated carbon beds, the outlet chamber of the activated carbon bed on the upstream side can be communicated with the intake chamber of the activated carbon bed on the downstream side through a switching valve. A catalytic module, including a catalytic combustion furnace and a gas mixer configured in sequence. The catalytic combustion furnace is communicated with the desorption outlets of a plurality of the activated carbon beds through a desorption outlet pipeline. The discharge outlet of the catalytic combustion furnace can be respectively communicated with the exhaust stack and the gas mixer. The outlet of the gas mixer is communicated with the desorption inlets of a plurality of the activated carbon beds through a desorption inlet pipeline, and the desorption inlet pipeline is also communicated with the dehumidified gas pipeline of the pretreatment module. An exhaust module, including the exhaust stack. Among them, the detachable connection between the modules is realized through matching connection flanges.

2. The paint spraying waste gas treatment device according to claim 1, characterized in that The activated carbon bed is configured as follows: the intake chamber and the outlet chamber are formed by partitioning with a partition wall, and multiple layers of the carbon beds are arranged at intervals on the desorption passage. A tubular support is arranged at the bottom of each layer of the carbon bed, and the tubular support forms a part of the desorption inlet pipeline communicated with the desorption inlet.

3. The paint spraying waste gas treatment device according to claim 2, wherein A flow guiding orifice plate is arranged on the upstream side of the adsorption material of the carbon bed.

4. The paint spraying waste gas treatment device according to claim 2, wherein The adsorption inlet of the intake chamber and the adsorption outlet of the outlet chamber are both communicated with a collecting valve chamber outside the activated carbon bed. The collecting valve chamber has two interfaces respectively communicated with the adsorption inlet pipeline and the adsorption outlet pipeline, and the opening directions of the first interface and the second interface are perpendicular to each other. A "T"-shaped valve plate is arranged in the collecting valve chamber. The "T"-shaped valve plate is hinged to the valve chamber side wall to switch between a communicating working position and a cut-off working position, and is configured as follows: for the "T"-shaped valve plate in the cut-off working position, its horizontal plate blocks the first interface or the second interface, and its vertical plate separates the adsorption inlet and the adsorption outlet. For the "T"-shaped valve plate in the communicating working position, its horizontal plate separates the adsorption inlet and the adsorption outlet, and its vertical plate blocks and separates the first interface and the second interface.

5. The paint spraying waste gas treatment device according to claim 4, characterized in that, The adsorption inlet pipe, the adsorption outlet pipe, the desorption inlet pipe and the desorption outlet pipe are separated by a pipe, and the pipe body is arranged along the exhaust gas treatment path and is configured as follows: a concave step surface is formed at the docking point with the catalytic module, and the interface between the desorption inlet pipe and the desorption outlet pipe is located on the concave step surface; a vertical pipe section extending vertically is formed at the docking point with the exhaust module, and the interface of the adsorption outlet pipe is located on the pipe wall of the vertical pipe section.

6. The paint spraying waste gas treatment device according to claim 1, wherein The pre-processing module further includes a powder sprayer arranged between the dust collector and the gas-solid mixer.

7. The paint spraying waste gas treatment device according to claim 1, characterized in that, The catalytic combustion furnace of the catalytic module is integrated with a heat exchanger, and the desorption outlet pipe is connected to the inlet of the catalytic combustion furnace through the heat exchange passage of the heat exchanger. The outlet of the catalytic combustion furnace is connected to the inlet of the heat source passage of the heat exchanger, and the exhaust port of the catalytic combustion furnace is formed by the outlet of the heat source passage.

8. The paint spraying waste gas treatment device according to claim 7, characterized in that, The adsorption outlet pipe is connected to the exhaust pipe through the main fan arranged in the exhaust module, the desorption outlet pipe is connected to the heat exchanger through the desorption fan arranged in the catalytic module, and the air supply port of the gas mixer is provided with a cooling fan; the outlet of the gas mixer can also be connected to the upstream end passage of the desorption fan.

9. The paint spraying waste gas treatment device according to claim 1, characterized in that, The exhaust cylinder comprises a plurality of sections of detachably connected cylinders, wherein the bottom section of the cylinder at the bottom is hinged to the bottom bracket of the exhaust module so as to switch between an erecting working position and a transporting working position.

10. The paint spraying waste gas treatment device according to claim 1, characterized in that, The bottom of each module body adopts a uniform load distribution structure, and each module body is provided with a lifting lug.

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