Waste gas treatment device for coating production and method thereof

Abstract

The invention relates to the technical field of waste gas treatment, and particularly discloses a waste gas treatment device for coating production, which comprises the following components arranged in sequence: a gas collection module comprising a plurality of gas collection pipelines for conveying waste gas generated by coating production to a filtering module; the filtering module comprises a filtering tank, a filtering rotating shaft and a first liquid outlet pipe, the filtering rotating shaft rotationally extends into the filtering tank from top to bottom, the first liquid outlet pipe is located on the bottom face of the filtering tank body, the filtering rotating shaft is hollow, the part, located in the filtering tank, of the filtering rotating shaft is provided with a plurality of telescopic stirring branch pipes in the circumferential direction, and the stirring branch pipes are provided with a plurality of nozzles used for forming a water mist layer in the filtering tank. The device can efficiently treat waste gas generated in coating production, and is simple in structure and suitable for popularization.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment, and particularly to a waste gas treatment device for paint production, and also to a waste gas treatment method for paint production. Background Art

[0002] Industrial paint is a chemical mixed paint that can firmly cover the surface of an object and serves functions such as protection, decoration, marking, and other special purposes. It has the functions of anti-corrosion and decorative appearance, and is an indispensable fine chemical product in modern industry.

[0003] Most traditional paints use organic solvents as solvents and diluents, so they are called oil-based paints. During the baking process, organic solvent volatiles such as xylene and trimethylbenzene are generated. These organic volatiles are harmful and toxic, which have a great impact on the physical health of on-site workers and the surrounding environment. The country is taking measures to gradually restrict the use of oil-based paints, and at the same time strongly advocates the use of more environmentally friendly water-based industrial paints.

[0004] Water-based industrial paints use water instead of diluents in traditional oil-based paints. Therefore, they are relatively environmentally friendly and safe. However, certain waste gases will also be generated during the production and spraying construction processes of water-based paints. These waste gases mainly include a small amount of organic substances such as alcohols, ammonia, and ethers, as well as water vapor. Although the total content of these waste gases is lower than that of the waste gases generated by oil-based paints and the harmfulness is also smaller, if not treated, it will also cause air pollution. The traditional treatment of waste gases in paint production and spraying construction mainly adopts the method of activated carbon adsorption. Since activated carbon adsorption is suitable for waste gas treatment in a static environment, its adsorption effect on high-speed flowing waste gases in industrial paint production and spraying construction is limited.

[0005] Therefore, for both oil-based paints and water-based paints, the treatment method of activated carbon adsorption cannot fully achieve the effect. This has been proven in practice. Considering the characteristic that the organic substances in water-based paints can be completely dissolved in water, it is feasible and effective to use water as a medium to fully absorb the waste gases generated during the production and spraying construction processes of water-based paints.

[0006] Relatively speaking, more waste gases are generated during the production and spraying construction processes of water-based paints. Most of the gases generated during the processing are ammonia and alcohol. The adsorption capacity of activated carbon for these components is weak. Coupled with the need to treat waste gases in a flowing manner to improve production speed, as the gas flow rate increases, the adsorption capacity of activated carbon becomes weaker, and even the adsorption effect cannot be exerted. Therefore, it is not suitable to use the method of activated carbon adsorption to treat waste gases. Summary of the Invention

[0007] In view of this, the present invention provides a waste gas treatment device for paint production to improve the efficiency of waste gas treatment in paint production.

[0008] In order to achieve the above-mentioned object, the basic scheme of the present invention provides a waste gas treatment device for coating production, comprising:

[0009] A gas collection module, including a plurality of gas collection pipelines, which transport waste gas generated by coating production to the filtering module;

[0010] The filter module comprises a filter tank, a filter shaft that rotates from top to bottom and extends into the filter tank, and a first liquid outlet pipe located on the bottom surface of the filter tank body. The filter shaft is hollow and a portion located in the filter tank is provided with a plurality of retractable stirring branches in the circumference. The stirring branches are provided with a plurality of nozzles for forming a water mist layer in the filter tank.

[0011] The condensation exhaust module includes a condensation tank with a cooling water pipe inside, a condensation gas collecting pipe connected to the filter tank, a filter shaft that rotates from top to bottom and extends into the condensation tank, and a first liquid outlet pipe located on the bottom of the filter tank body. The condensation shaft is hollow and a condensation through hole is circumferentially provided on the part located in the condensation tank. The outlet end of the condensation tank gas collecting pipe extends into the bottom of the condensation tank and faces the opening at the lower end of the condensation shaft.

[0012] In a possible design, a reflective cover is provided in the middle of the filter tank body, the gas outlet end of the gas collecting pipeline faces the working surface of the reflective cover, and a plurality of vent holes are provided on the reflective cover.

[0013] In a possible design, a ventilation gap is provided between the edge of the reflector and the filter tank.

[0014] In a possible design, the air collecting pipe outlet is provided with a first diffuser facing the reflector, the condensation air pipe outlet is provided with an upward second diffuser, and the lower end of the condensation shaft is provided with an air collecting hood facing the second diffuser.

[0015] In a possible design, a plurality of stirring branches are distributed on the filter shaft in a spatial spiral shape from top to bottom, and the length of the stirring branches gradually decreases from top to bottom.

[0016] In a possible design, the nozzle is arranged at the upper part of the stirring branch pipe.

[0017] In a possible design, a plurality of guide blades are evenly distributed in the circumferential direction in the middle of the cavity of the condensation shaft.

[0018] In a possible design, the upper end of the filter shaft extends out of the filter tank and is provided with a first driven pulley, and the upper end of the condensation shaft extends out of the condensation tank and is provided with a second driven pulley.

[0019] In a possible design, the filter shaft is rotationally connected to the filter tank via a first bearing, and the condensation shaft is rotationally connected to the condensation tank via a second bearing.

[0020] The present invention also provides a method for treating waste gas in paint production. This method is based on the waste gas treatment device for paint production as described above and includes the following steps:

[0021] Step 1: Pass the waste gas generated in paint production into the filtration tank through a gas collection pipeline;

[0022] Step 2: Start the cooling water pipe to cool down the condensation tank, and then start the motor to drive the filtration rotating shaft and the condensation rotating shaft to rotate. Gradually add external water into the filtration tank through the filtration rotating shaft and the stirring branch pipes to form a water mist layer. During this process, the rotation speed of the filtration rotating shaft gradually increases from 25 r / min to 80 r / min; the rotation speed of the condensation water pipe is controlled at 100 r / min - 150 r / min;

[0023] Step 3: After the reaction is completed, stop the filtration rotating shaft and the condensation rotating shaft, and drain the water at the first liquid outlet pipe and the second liquid outlet pipe.

[0024] Compared with the prior art, the principle and effects of the present invention are as follows:

[0025] (1) In the device of the present invention, the waste gas successively passes through the gas collection module, the filtration module, and the condensation module. The main components of the waste gas, ammonia and alcohol, are filtered clean after passing through the filtration module. The remaining waste gas is mainly air and water vapor. The setting of the condensation module is mainly to condense the water vapor in the waste gas so as to separate it from the air. Among them, the condensation rotating shaft can not only play the role of contacting the waste gas to condense the water vapor therein, but after the water vapor is condensed, through the centrifugal action of the condensation rotating shaft, it escapes from the condensation through holes on the condensation rotating shaft and enters the condensation tank, and finally converges at the bottom of the condensation tank and flows out from the second liquid outlet pipe.

[0026] (2) Due to the special structural design of the reflector hood in the present invention, when the waste gas at the gas collection pipeline rushes out, it will be reflected and dispersed at the reflector hood, thereby making full use of the space inside the filtration tank. It also avoids the waste gas directly flushing upwards and dispersing the water mist layer, resulting in the inability to achieve the function of contacting and filtering the main components of the waste gas with the water mist. At the same time, it can also increase the travel route of the waste gas, enabling the waste gas and the water mist to have sufficient contact and filtration time. More particularly, the through holes on the reflector hood can not only facilitate the water mist droplets that have come into contact with and filtered the main components of the waste gas to pass through, but also allow part of the waste gas to pass through and diffuse upwards again through the ventilation gap. That is to say, the reflector hood also plays a role in diverting the waste gas that has just entered the filtration tank, greatly improving the filtration effect of the filtration tank, and making the impulse energy between the waste gas and the water mist layer equivalent, better achieving the filtration effect and function of the filtration tank.

[0027] (3) The stirring branch pipe structure of the present invention is more in line with the distribution levels of waste gas and water mist in the filtration tank. At the same time, the spatial spiral distribution design enables the stirring branch pipe during operation to have a stronger stirring ability for waste gas and water mist, and can better promote the downward convection of water mist with waste gas. It can also enhance the collision and centrifugal movement of droplets after the contact filtration of waste gas and water mist, realizing the rapid aggregation of droplets; the ingenious cooperation of the filtration rotating shaft, stirring branch pipe and reflection cover makes the contact filtration and convection energy of waste gas and water mist more matched, and efficiently realizes the filtration of the main components of waste gas. Brief Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0029] Figure 1 Fig. shows a three-dimensional view of an exhaust gas treatment device for paint production proposed in an embodiment of the present application;

[0030] Figure 2 Fig. shows a front view of an exhaust gas treatment device for paint production proposed in an embodiment of the present application;

[0031] Figure 3 Fig. shows a side view of an exhaust gas treatment device for paint production proposed in an embodiment of the present application;

[0032] Figure 4 Fig. shows a top view of an exhaust gas treatment device for paint production proposed in an embodiment of the present application;

[0033] Figure 5 Fig. shows Figure 3 a sectional view taken along line A-A of

[0034] Figure 6 Fig. shows Figure 3 a sectional view taken along line C-C of

[0035] Figure 7 Fig. shows Figure 2 a stepped sectional view taken along line F-F of

[0036] Figure 8 Fig. shows a three-dimensional view of an exhaust gas treatment device for paint production proposed in an embodiment of the present application;

[0037] Figure 9 Fig. shows Figure 8 a front view of

[0038] Figure 10 Fig. shows Figure 9Partial enlarged view of part B in

[0039] Figure 11 shows Figure 10 Cross-sectional view taken along the line D-D of Detailed implementation manners

[0040] To further illustrate the embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. They are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0041] Description of reference numerals:

[0042] Filter tank 1, gas collection pipeline 2, first diffusion port 3, reflector 4, first liquid discharge pipe 5, filter rotating shaft 6, stirring branch pipe 7, first driven pulley 8, first bearing 9, condensation gas transmission pipe 10, condensation tank 11, cooling water pipe 12, condensation rotating shaft 13, guide vane 14, condensation through hole 15, second diffusion port 16, second driven pulley 17, fixed rod 18, gas collection hood 19, nozzle 20, second liquid discharge pipe 21.

[0043] Specifically, for better displaying and understanding the structure of the device of the present invention, Figure 8 、 Figure 9 in

[0044] As Figures 1 - 11 shown, the embodiment of the present invention discloses an exhaust gas treatment device for paint production, including, arranged in sequence:

[0045] Gas collection module, including multiple gas collection pipelines 2, and the gas collection pipelines 2 convey the exhaust gas generated by paint production to the filtration module; in order to improve the gas collection efficiency, an intake fan can be provided at the gas collection pipeline 2, and the combination of the intake fan and the gas collection pipeline 2 belongs to conventional technology and will not be elaborated here.

[0046] Filter module, including a filter tank 1, a filter rotating shaft 6 that rotates downward into the filter tank 1, and a first liquid outlet pipe 5 located at the bottom surface of the filter tank 1 body. The filter rotating shaft 6 is hollow, and several telescopic stirring branch pipes 7 are circumferentially arranged on the part located in the filter tank 1. A number of nozzles 20 for forming a water mist layer in the filter tank 1 are provided on the stirring branch pipes 7; the setting of the filter tank 1 can provide a place for the entire filtering process and is also the installation support for the components of the filter module. The hollow design of the filter rotating shaft 6 facilitates the delivery of external water source to the nozzles 20 of the stirring branch pipes 7 through the filter rotating shaft 6. The stirring branch pipes 7 are connected to the filter rotating shaft 6. The connection and communication between the external water source and the upper end of the filter rotating shaft 6 can be achieved through a rotating joint, which will not interfere with the normal rotation of the filter rotating shaft 6. The rotating joint can be purchased with appropriate specifications and sizes on the market. The setting of the stirring branch pipes 7 greatly increases the distribution range of the water mist. At the same time, the stirring branch pipes 7 also play the role of stirring the water mist and the waste gas to increase mixing and contact. The stirring branch pipes 7 can also enhance the speed of the water mist, thereby enhancing the convection intensity between the water mist and the waste gas, improving the treatment efficiency and effect of the waste gas generated in paint production. The filter rotating shaft 6 and the filter tank 1 are rotationally connected through a first bearing 9. The first bearing 9 is a thrust bearing, also known as a thrust bearing, which is composed of two thrust washers or more thrust washers and several rolling elements. It can not only facilitate the rotation of the filter rotating shaft 6 but also bear the axial load brought by the filter rotating shaft 6 and its attached components. The upper end of the filter rotating shaft 6 extends out of the filter tank 1 and is provided with a first driven pulley 8. A first driving pulley is installed on an external motor. A transmission belt is wound between the first driving pulley and the first driven pulley 8. The external motor and the filter rotating shaft 6 are belt-driven, so as to drive the filter rotating shaft 6 to rotate. In this embodiment, the size of the first driving pulley should be smaller than that of the first driven pulley 8.

[0047] The condensation exhaust module includes a condensation tank 11 with a cooling water pipe 12, a condensation gas collecting pipe connected to the filter tank 1, a filter shaft 6 that rotates from top to bottom and extends into the condensation tank 11, and a first liquid outlet pipe 5 located on the bottom surface of the filter tank 1. The condensation shaft 13 is hollow and the part located in the condensation tank 11 is circumferentially provided with condensation through holes 15. The air inlet end of the air collecting pipe of the condensation tank 11 is opened at the top of the filter tank 1, and the air outlet end of the air collecting pipe of the condensation tank 11 extends into the bottom of the condensation tank 11 and faces the opening at the lower end of the condensation shaft 13. The main components of the exhaust gas, ammonia and alcohol, are basically filtered out after passing through the filter module, and the remaining exhaust gas is mainly air and water vapor. The condensation module is mainly set to exhaust the exhaust gas. The water vapor in the exhaust gas is condensed and separated from the air, wherein the condensation shaft 13 can play the role of contacting with the exhaust gas to condense the water vapor therein, and after the water vapor is condensed, it passes through the centrifugal effect of the condensation shaft 13, escapes from the condensation through hole 15 on the condensation shaft 13 and enters the condensation tank 11, and finally gathers at the bottom of the condensation tank 11 and flows out from the second liquid outlet pipe 21. The condensation shaft 13 and the condensation tank 11 are connected to each other through the second bearing. The second bearing is a thrust bearing, also known as a thrust bearing, which is composed of two thrust washers or more thrust washers and a number of rolling bodies. It can not only facilitate the rotation of the condensation shaft 13, but also bear the axial load brought by the condensation shaft 13 and its accessories. The second driving pulley is installed on the external motor, and the transmission belt is wound between the second driving pulley and the second driven pulley 17. The external motor and the condensation shaft 13 realize belt transmission, thereby driving the condensation shaft 13 to rotate. In this embodiment, the size of the second driving pulley should be smaller than the second driven pulley 17.

[0048] Furthermore, in order to facilitate the functions of the present invention, the components of the gas collection module, the condensation module and the filtration module are made of stainless steel or other metal materials that are resistant to exhaust gas impact and corrosion.

[0049] Furthermore, a number of guide blades 14 are evenly distributed circumferentially in the middle of the cavity of the condensation shaft 13. The guide blades 14 can not only play the role of heat conduction in contact with the filtered exhaust gas, increasing the condensation area of the condensation shaft 13, thereby improving the water vapor condensation effect on the exhaust gas, but also have a certain driving effect, stirring or moving the exhaust gas slowly upward and out of the condensation tank 11, so that the filtered exhaust gas can have sufficient condensation time, and can also promote the mutual collision and aggregation of condensation droplets, thereby greatly improving the condensation effect and efficiency.

[0050] In at least one embodiment, a reflective cover 4 is provided in the middle of the filter tank 1, the outlet end of the gas collecting pipe 2 faces the working surface of the reflective cover 4, a plurality of vents are provided on the reflective cover 4, and a ventilation gap is provided between the edge of the reflective cover 4 and the filter tank 1, such as Figure 5 , Figure 7 , Figure 8 , Figure 9As shown, the reflector 4 is designed to be spherical and arcuate, and the center of the spherical arc is close to the side of the filtration rotating shaft 6. With this design, when the waste gas at the gas collection pipe 2 rushes out, it will be reflected and dispersed at the reflector 4, thus making full use of the space inside the filtration tank 1. It also avoids the direct upward rush of the waste gas from dispersing the water mist layer, resulting in the failure to achieve the function of contacting and filtering the main components of the waste gas with the water mist. At the same time, it can also increase the travel route of the waste gas, enabling sufficient contact and filtration time between the waste gas and the water mist. More particularly, the through holes on the reflector 4 not only facilitate the passage of the water mist droplets after contact and filtration with the main components of the waste gas, but also allow some waste gas to pass through and diffuse upward again through the ventilation gap. That is to say, the reflector 4 also plays a role in diverting the waste gas just entering the filtration tank 1, greatly improving the filtration effect of the filtration tank 1 and making the impulse kinetic energy between the waste gas and the water mist layer equivalent, better achieving the filtration effect and function of the filtration tank 1.

[0051] In at least one embodiment, the gas outlet end of the gas collection pipe is provided with a first diffusion port 3 facing the reflector 4, the gas outlet end of the condensate transmission pipe 10 is provided with an upward second diffusion port 16, the lower end of the condensate rotating shaft 13 is provided with a gas collection hood 19 facing the second diffusion port 16. The first diffusion port 3, the second diffusion port 16 and the gas collection hood 19 are all arranged in a horn shape. The first diffusion port 3 and the second diffusion port 16 respectively enhance the diffusion and gas outlet effects at the gas outlet ends of the gas collection pipe and the condensate input pipe, and also have the effect of delaying the waste gas, enabling the waste gas to have sufficient contact time in the filtration tank 1 or the condensate tank 11. The setting of the gas collection hood 19 enhances the gas collection and collection effects of the condensate rotating shaft 13.

[0052] In at least one embodiment, as Figure 5 , Figure 7 , Figure 8 , Figure 9 shown, a number of stirring branch pipes 7 are distributed in a spatial spiral shape on the filtration rotating shaft 6 from top to bottom, and the length of the stirring branch pipes 7 gradually decreases from top to bottom. Such a setting is more in line with the distribution levels of the waste gas and the water mist in the filtration tank 1. At the same time, the spatial spiral distribution design makes the stirring branch pipes 7 have a stronger stirring ability for the waste gas and the water mist during operation, and can better push the water mist downward to convect with the waste gas, and can also enhance the collision and centrifugal movement of the droplets after the waste gas contacts and filters with the water mist, realizing the rapid collection of the droplets. The stirring branch pipe 7 at least includes a first pipe body communicated with the filtration rotating shaft 6, a second pipe body slidably arranged with the first pipe body, and a spring (not shown in the figure) located between the second pipe body and the first pipe body. The spring mainly plays a reset role. The outer end of the second pipe body is sealed, and the extension of the second pipe body mainly relies on the centrifugal force generated by the rotation of the filtration rotating shaft 6 to overcome the spring elastic force. In order to increase this centrifugal force, a counterweight can be added to the outer end of the second pipe body.

[0053] The filtering rotating shaft 6, the stirring branch pipe 7 and the reflection cover 4 are ingeniously coordinated, enabling the contact filtration between the waste gas and the water mist and better matching the flow kinetic energy, thus efficiently filtering the main components of the waste gas.

[0054] In at least one embodiment, as Figure 9 , Figure 10 , Figure 11 shown, the nozzle 20 is arranged on the upper part of the stirring branch pipe 7. This arrangement can facilitate the water mist sprayed from the stirring branch pipe 7 to cover the entire space of the filtration tank 1, realizing dead - angle - free waste gas filtration treatment. At the same time, the nozzle 20 should be embedded in the stirring branch pipe 7 to avoid protruding from the stirring branch pipe 7 and interfering with the telescopic movement of the stirring branch pipe 7.

[0055] The present invention also provides a method for treating waste gas in paint production. This method is based on the waste gas treatment device for paint production as described above. The method includes the following steps. Step 1: Pass the waste gas generated in paint production into the filtration tank through the gas - collecting pipeline.

[0056] Step 2: Start the cooling water pipe to cool down the condensation tank, and then start the motor to drive the filtering rotating shaft and the condensation rotating shaft to rotate, gradually adding external water into the filtration tank through the filtering rotating shaft and the stirring branch pipe to form a water mist layer. During this process, the rotation speed of the filtering rotating shaft gradually increases from 25 r / min to 80 r / min; the rotation speed of the condensation water pipe is controlled at 100 r / min - 150 r / min.

[0057] Step 3: After the reaction is completed, stop the filtering rotating shaft and the condensation rotating shaft, and drain the water at the first liquid outlet pipe and the second liquid outlet pipe.

[0058] The present invention also provides a computer - readable storage medium. The computer - readable storage medium stores computer - executable instructions, and the computer - executable instructions are used to enable a computer to implement the aforementioned method for treating waste gas in paint production.

[0059] Although the methods described above are illustrated and described as a series of acts for simplicity of explanation, it should be understood and appreciated that the methods are not limited by the order of the acts, since in accordance with one or more embodiments, some acts may occur in a different order and / or concurrently with other acts not illustrated and described herein or other acts that would be understood by those skilled in the art. Those skilled in the art will further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or a combination of both. To clearly illustrate this interchangeability of hardware and software, the various illustrative components, blocks, modules, circuits, and steps are described above in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention. The various illustrative logical blocks, modules, and circuits described in connection with the embodiments disclosed herein may be implemented using a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gates or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration. The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of both. The software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such that the processor can read from, and write to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in a user terminal. In the alternative, the processor and the storage medium may reside as discrete components in a user terminal. In one or more exemplary embodiments, the described functionality may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software as a computer program product, the functions may be stored on or transmitted via a computer readable medium as one or more instructions or code.Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. The storage media can be any available media that can be accessed by a computer. By way of example and not limitation, such computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Any connection is properly termed a computer-readable media. For example, if the software is transmitted from a web site, central control computer, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of the medium. As used herein, the terms disk and disc include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc, where disks typically reproduce data magnetically, while discs reproduce data optically with a laser. Combinations of the above should also be included within the scope of computer-readable media.

[0060] Although the foregoing methods are illustrated and described as a series of acts, it should be understood and appreciated that the methods are not limited by the order of the acts, because according to one or more embodiments, some acts may occur in different orders and / or concurrently with other acts not illustrated and described herein or other acts that are understood by those skilled in the art.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention in any form. Although the present invention has been disclosed above in a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to obtain equivalent embodiments with equivalent changes, but as long as the technical content of the present invention is not departed from, any brief modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An exhaust gas treatment device for paint production, characterized in that, Including the following settings: A gas collection module, including a plurality of gas collection pipelines, which transport waste gas generated by coating production to the filtering module; The filter module comprises a filter tank, a filter shaft that rotates from top to bottom and extends into the filter tank, and a first liquid outlet pipe located on the bottom surface of the filter tank body. The filter shaft is hollow and a portion located in the filter tank is provided with a plurality of retractable stirring branches in the circumference. The stirring branches are provided with a plurality of nozzles for forming a water mist layer in the filter tank. The condensation exhaust module includes a condensation tank with a cooling water pipe inside, a condensation gas collecting pipe connected to the filter tank, a filter shaft that rotates from top to bottom and extends into the condensation tank, and a first liquid outlet pipe located on the bottom of the filter tank body. The condensation shaft is hollow and a condensation through hole is circumferentially provided on the part located in the condensation tank. The outlet end of the condensation tank gas collecting pipe extends into the bottom of the condensation tank and faces the opening at the lower end of the condensation shaft.

2. An exhaust gas treatment device for paint production according to claim 1, characterized in that, A reflective cover is arranged in the middle of the filter tank body, the gas outlet end of the gas collecting pipeline faces the working surface of the reflective cover, and a plurality of vent holes are arranged on the reflective cover.

3. The waste gas treatment device for paint production according to claim 2, wherein, A ventilation gap is arranged between the edge of the reflector cover and the filter tank body.

4. An exhaust gas treatment device for paint production according to claim 2 or 3, characterized in that The gas outlet end of the gas collecting pipe is provided with a first diffusion port facing the reflector cover, the gas outlet end of the condensation gas transmission pipe is provided with an upward second diffusion port, and the lower end of the condensation rotating shaft is provided with a gas collecting cover facing the second diffusion port.

5. An exhaust gas treatment device for paint production according to claim 4, characterized in that, A plurality of stirring branch pipes are distributed on the filter shaft in a spatial spiral shape from top to bottom, and the length of the stirring branch pipes gradually decreases from top to bottom.

6. An exhaust gas treatment device for paint production according to any one of claims 1-3 or 5, characterized in that, The nozzle is arranged at the upper part of the stirring branch pipe.

7. An exhaust gas treatment device for paint production according to any one of claims 1 - 3 or 5, characterized in that, A plurality of guide blades are evenly distributed in the circumferential direction in the middle of the cavity of the condensation shaft.

8. An exhaust gas treatment device for coating production according to any one of claims 1-3 or 5, characterized in that, The upper end of the filter shaft extends out of the filter tank and is provided with a first driven pulley, and the upper end of the condensation shaft extends out of the condensation tank and is provided with a second driven pulley.

9. An exhaust gas treatment device for paint production according to claim 8, characterized in that, The filter shaft is rotatably connected to the filter tank via a first bearing, and the condensation shaft is rotatably connected to the condensation tank via a second bearing.

10. A waste gas treatment method for paint production, characterized in that, The method is based on the waste gas treatment device for coating production according to any one of claims 1 to 9, comprising the following steps: Step 1, passing the waste gas generated by the coating production into the filter tank through the gas collecting pipeline; Step 2, start the cooling water pipe to cool the condenser tank, then start the motor to drive the filter shaft and the condenser shaft to rotate, and gradually add external water into the filter tank through the filter shaft and the stirring branch pipe to form a water mist layer; during the process, the speed of the filter shaft gradually increases from 25r / min to 80r / min; the speed of the condenser water pipe is controlled at 100r / min-150r / min; Step 3, after the reaction is completed, shut down the filtering shaft and the condensing shaft, and drain the water at the first liquid outlet pipe and the second liquid outlet pipe.

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