CN216171211U

CN216171211U - Coating drying line exhaust-gas treatment equipment

Info

Publication number: CN216171211U
Application number: CN202122301456.XU
Authority: CN
Inventors: 许雅斌
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-09-23
Filing date: 2021-09-23
Publication date: 2022-04-05
Anticipated expiration: 2031-09-23

Abstract

The utility model discloses a coating drying line waste gas treatment device, which relates to the field of waste gas treatment and aims to solve the problem that the VOCs (volatile organic compounds) in the coating drying line waste gas in the prior art exceeds the standard in emission.

Description

Coating drying line exhaust-gas treatment equipment

Technical Field

The utility model relates to the field of waste gas treatment, in particular to waste gas treatment equipment for a coating and drying line.

Background

VOC substances refer to volatile organic substances, VOC is an english abbreviation of volatile organic compoundS (volatile organic compoundS), and VOC in the general sense is a commanding organic substance; but the definition in the environmental protection meaning refers to an active volatile organic compound, namely a volatile organic compound which can generate harm; in fact, VOCs can be divided into two categories: one class is the definition of VOC in the ordinary sense, which only describes what is volatile organic or under what conditions; another category is defined in the sense of environmental protection, that is, volatile organic compounds that are active, i.e., volatile organic compounds that are hazardous. In the environmental protection sense, the two points of volatilization and participation in atmospheric photochemical reaction are very important. It is not volatilized or does not participate in atmospheric photochemical reaction, thus not constituting a hazard.

The coating stoving line is partly dried with the application article to follow-up coating operation has a large amount of VOCs in the waste gas that produces during the stoving, if not handle, can bring adverse effect to atmospheric environment.

SUMMERY OF THE UTILITY MODEL

In view of the problems in the prior art, the utility model discloses a coating drying line waste gas treatment device which adopts the technical scheme that the device comprises a control circuit and a control panel, wherein a microprocessor is arranged in the control circuit and is electrically connected with the control panel, the device also comprises a gas collecting hood, a spray tower, a photocatalyst and an active carbon box, the gas collecting hood is connected with the spray tower through a gas collecting pipe, a fan is arranged on the gas collecting pipe, the fan can send waste gas into the spray tower through the gas collecting hood for spraying, a liquid discharge pipe is arranged below the spray tower and can discharge spray liquid in time, a spray pipe is arranged above the spray tower, the spray pipe is externally connected with a spray liquid supply workshop, spray holes are arranged on the spray pipe and can spray the spray liquid, an air outlet pipe is arranged on the top surface of the spray tower, a demister is arranged at the pipe opening in the spray tower and can remove water mist mixed in the waste gas, the other pipe opening of the air outlet pipe is connected with the photocatalyst, the photocatalyst comprises a shell, an air pipe, pipe plates and a partition plate, the partition plate divides the inside of the shell into a U-shaped cavity, the residence time of waste gas in the photocatalyst can be prolonged, the treatment effect is enhanced, a group of pipe plates are respectively arranged above and below the partition plate, at least two pipe plates are arranged in each group, the air pipe is arranged on each pipe plate, the connection mode of the shell and the pipe plates and the connection mode of the pipe plates and the air pipe are the same as the connection mode of the pipe plates and the shell in the floating head type heat exchanger and the connection mode of the pipe bundles and the pipe plates, the pipe can be periodically disassembled and maintained, the air pipe is a transparent pipe, the photocatalyst is coated on the inner wall of the shell, an ultraviolet lamp is arranged on the inner wall of the shell and the partition plate, and ultraviolet light irradiates organic matters in the waste gas in the air inlet pipe, which are contacted with the photocatalyst in stages; the outlet of the photocatalyst is connected with an activated carbon box through a pipeline, the bottom surface of the activated carbon box is provided with an exhaust pipe, waste gas after photocatalytic treatment is discharged after being filtered by activated carbon, so that the VOCs in the waste gas can be prevented from polluting the atmospheric environment, and the microprocessor is connected with the fan and the ultraviolet lamp is electrically connected with the ultraviolet lamp.

As a preferred technical scheme of the utility model, the spray pipe is divided into two branch pipes in the spray tower, the branch pipes and the spray pipe are distributed in a cross shape, the bottom surfaces of the branch pipes are provided with spray holes, and the branch pipes can enlarge the spray area and improve the spray effect.

As a preferred technical scheme of the present invention, a photocatalyst box is arranged at an outlet of the photocatalyst, the bottom of the photocatalyst box is of a mesh structure, the inside of the photocatalyst box is communicated with the pipeline, a pipe connecting port is arranged at the right side of the photocatalyst box, the pipe connecting port corresponds to the air pipe in position and is matched with the air pipe in size, air holes are formed in the side wall of the pipe connecting port, and the waste gas treated by the air pipe below enters the photocatalyst box through the pipe connecting port, so that residual organic matters in the waste gas can be further treated, and the treatment effect is improved.

As a preferable technical solution of the present invention, the photocatalyst is titanium dioxide.

As a preferred technical scheme of the utility model, the shell of the photocatalyst is a shell with two through ends, the two ends are connected with end sockets through flanges, and the end sockets can be periodically opened to maintain and replace the air pipe and the photocatalyst box.

According to a preferred technical scheme, a press frame is arranged in an activated carbon box, the press frame is an annular frame and is installed on the inner wall of the activated carbon box, an activated carbon stuffing box is connected below the press frame in a sliding mode, air holes are formed in the top surface and the bottom surface of a box body of the activated carbon stuffing box, a vertical sliding groove is formed in the side wall of the activated carbon box, an ejector rod is connected in the sliding groove in a sliding mode, a lifting mechanism is arranged below the ejector rod, the activated carbon stuffing box is connected to the top surface of the ejector rod in a sliding mode, a sealing cover is connected to the side surface of the activated carbon box through a flange, the lifting mechanism can lift the activated carbon stuffing box upwards through the ejector rod to enable the activated carbon stuffing box to be tightly pressed against the press frame so as to fix the activated carbon stuffing box, and the lifting mechanism is lowered to facilitate taking out of the activated carbon stuffing box for replacement.

As a preferred technical scheme of the utility model, the lifting mechanism is a scissor type lifting mechanism driven by an electric cylinder, the scissor type lifting mechanism is mature in technology, simple in structure and stable in performance, and the electric cylinder is electrically connected with the microprocessor.

As a preferred technical scheme of the utility model, the rubber pad is arranged on the bottom surface of the press frame, so that a gap between the press frame and the activated carbon stuffing box can be sealed, and the waste gas can completely pass through the activated carbon to achieve the filtering effect.

The utility model has the beneficial effects that: the utility model can suck the waste gas including VOCs generated by the drying box into the spray tower by the fan and the gas collecting hood through the gas collecting hood by arranging the gas collecting hood, the spray tower, the photocatalyst and the activated carbon box, and the utility model can cool, remove dust and decompose part of grease in the spray tower through alkali liquor spraying, thereby providing a foundation for subsequent treatment.

Further, the outlet of photocatalyst ware sets up the photocatalyst case and can further decompose the residual organic matter in the waste gas that will leave the photocatalyst ware to improve the treatment effeciency, the photocatalyst case is convenient for change through flange joint head in the photocatalyst ware both ends.

Drawings

In order to more clearly illustrate the detailed description of the utility model or the technical solutions in the prior art, the drawings needed to be used in the detailed description or the prior art will be briefly described below; in all the drawings, the elements or parts are not necessarily drawn to actual scale.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic top view of the shower tube of the present invention;

FIG. 3 is a schematic view of the nozzle structure of the present invention;

FIG. 4 is a schematic view of the external structure of the photocatalyst of the present invention;

FIG. 5 is a schematic view of the external structure of the activated carbon tank of the present invention;

FIG. 6 is a schematic view of a press frame structure according to the present invention.

In the figure: 1. a gas-collecting hood; 2. a gas collecting pipe; 3. a fan; 4. a spray tower; 5. a shower pipe; 6. a demister; 7. an air outlet pipe; 8. a photocatalyst; 801. sealing the end; 9. an air tube; 10. a tube sheet; 11. a partition plate; 12. a photocatalyst box; 13. an activated carbon box; 1301. sealing the cover; 14. an activated carbon stuffing box; 15. pressing the frame; 16. a top rod; 17. a lifting mechanism; 18. a pipe connecting port.

Detailed Description

The technical scheme of the utility model is clearly and completely described in the following with reference to the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

As shown in fig. 1 to 6, the utility model discloses a coating drying line waste gas treatment device, which adopts the technical scheme that the device comprises a control circuit and a control panel, wherein a microprocessor is arranged in the control circuit and is electrically connected with the control panel, the device also comprises a gas collecting hood 1, a spray tower 4, a photocatalyst 8 and an active carbon box 13, the gas collecting hood 1 is connected with the spray tower 4 through a gas collecting pipe 2, a fan 3 is arranged on the gas collecting pipe 2, a liquid discharge pipe is arranged below the spray tower 4, a spray pipe 5 is arranged above the spray tower 4, spray holes are arranged on the spray pipe 5, an air outlet pipe 7 is arranged on the top surface of the spray tower 4, a demister 6 is arranged at a pipe orifice in the spray tower 4 on the air outlet pipe 7, the other pipe orifice of the air outlet pipe 7 is connected with the photocatalyst 8, the fan 3 feeds the waste gas generated by a drying line through the gas collecting hood 1 and then feeds the waste gas into the spray tower 4 through the gas collecting pipe 2, the spraying liquid is supplied to a workshop to supply alkali liquor, the alkali liquor is sprayed out from a spraying hole below a spraying pipe 5 and fully contacts with waste gas so as to reduce the temperature, suppress dust and decompose part of organic matters, the sprayed gas is subjected to doped water vapor removal by a demister 6 and enters a photocatalyst 8, the photocatalyst 8 comprises a shell, gas pipes 9, pipe plates 10 and a partition plate 11, the inside of the shell is divided into U-shaped cavities by the partition plate 11, a group of pipe plates 10 is respectively arranged above and below the partition plate 11, at least two pipe plates 10 are arranged in each group, gas pipes 9 are arranged on the pipe plates 10, the gas pipes 9 are transparent pipes, photocatalyst is coated on the inner walls of the transparent pipes, ultraviolet lamps are arranged on the inner walls of the shell and the partition plate 11, and the waste gas entering the photocatalyst 8 contacts with the photocatalyst on the inner walls of the gas pipes 9 when passing through the gas pipes 9 and is decomposed under the irradiation of the ultraviolet light; the outlet of the photocatalyst 8 is connected with an activated carbon box 13 through a pipeline, an exhaust pipe is arranged on the bottom surface of the activated carbon box 13, waste gas subjected to ultraviolet light oxygen catalysis treatment is finally filtered by activated carbon and then is discharged up to the standard, and the microprocessor is connected with the fan 3 and the ultraviolet lamp electrically.

As a preferable technical scheme of the utility model, the spray pipe 5 is divided into two branch pipes in the spray tower 4, the branch pipes and the spray pipe 5 are distributed in a cross shape, spray holes are formed in the bottom surfaces of the branch pipes, and the branch pipes and the spray pipe 5 can fully cover the interior of the spray tower 4.

As a preferred technical solution of the present invention, a photocatalyst box 12 is provided at an outlet of the photocatalyst 8, the bottom of the photocatalyst box 12 is a mesh structure, the inside of the photocatalyst box 12 is communicated with the pipeline, a pipe connection port 18 is provided at the right side of the photocatalyst box 12, the pipe connection port 18 corresponds to the gas pipe 9 in position and has a size matched with that of the gas pipe, the side wall of the pipe connection port 18 is provided with air holes, the pipe connection port enables gas passing through the gas pipe 9 to enter the photocatalyst box 12, three layers of partition plates are provided in the photocatalyst box 12, photocatalysts are provided on the partition plates, and a gap is provided between the partition plates to ensure that ultraviolet light can irradiate the photocatalyst box 12, and the photocatalyst box 12 can treat residual organic matters in the exhaust gas.

As a preferred technical scheme of the utility model, the housing of the photocatalyst 8 is a shell with two through ends, and the two ends are connected with end sockets 801 through flanges; the sealing head 801 can be opened periodically to replace the photocatalyst box 12, and the air pipe 9 is drawn out to renew the photocatalyst on the inner wall or directly replace the air pipe 9.

As a preferred technical scheme of the utility model, a press frame 15 is arranged in an activated carbon box 13, the press frame 15 is an annular frame and is arranged on the inner wall of the activated carbon box 13, an activated carbon stuffing box 14 is connected below the press frame 15 in a sliding manner, air holes are formed in the top surface and the bottom surface of the activated carbon stuffing box 14, a vertical sliding groove is formed in the side wall of the activated carbon box 13, a push rod 16 is connected in the sliding groove in a sliding manner, a lifting mechanism 17 is arranged below the push rod 16, the activated carbon stuffing box 14 is connected on the top surface of the push rod 16 in a sliding manner, and the side surface of the activated carbon box 13 is connected with a sealing cover 1301 through a flange; when the activated carbon stuffing box 14 is replaced, the sealing cover 1301 is opened, the lifting structure 17 is lowered to take out the activated carbon stuffing box 14, the new activated carbon stuffing box 14 is placed into the activated carbon box 13, then the lifting mechanism 17 is lifted to complete the fixation of the activated carbon stuffing box 14, and the sealing cover 1301 is buckled.

As a preferred technical solution of the present invention, the lifting mechanism 17 is a scissor-type lifting mechanism driven by an electric cylinder, and the electric cylinder is electrically connected to the microprocessor.

As a preferred technical solution of the present invention, a rubber pad is disposed on the bottom surface of the pressing frame 15.

The working principle of the utility model is as follows: the fan 3 and the ultraviolet lamp are powered by the control panel, the fan 3 sends the waste gas generated by the drying line into the spray tower 4 through the gas collecting pipe 2 by the gas collecting hood 1, the alkali liquor supplied to a workshop is supplied to the spray tower 4 through the spray pipe 5 and sprayed out from the spray holes, the alkali liquor is fully contacted with the waste gas to play the roles of cooling and dust suppression and can decompose part of organic matters, the spray liquid is discharged through the liquid discharge pipe, the gas is removed with water vapor by the demister 6 and then enters the photocatalyst 8 through the gas outlet pipe 7, the waste gas entering the photocatalyst 8 flows to the right cavity through the upper gas pipe 9 under the isolation action of the partition plate 11, the waste gas is dispersed in the photocatalyst box 12 through the connecting pipe 18 through the lower gas pipe 9 and leaves the photocatalyst box 8 through the pipeline, the organic matters in the waste gas are fully contacted with the photocatalyst and decomposed under the irradiation of ultraviolet light when passing through the gas pipe 9 and the photocatalyst box 12, the exhaust gas leaving the photocatalyst 8 is finally filtered and discharged by activated carbon contained in an activated carbon stuffing box 14 in an activated carbon box 13.

After the treatment is finished, the end socket 801 is opened, the photocatalyst box 12 can be taken out, the air pipe 9 is taken down from the tube plate 10 to be reset and installed after the photocatalyst is updated, and the air pipe 9 is inserted into the connecting pipe port 18 of the photocatalyst box 12 during resetting and installation; and opening a sealing cover 1301 of the activated carbon box 13, controlling the lifting mechanism 17 to descend through the control panel, taking out the activated carbon box 14 to replace the activated carbon, then putting the activated carbon box 14 back into the activated carbon box 13, lifting the lifting mechanism 17 to enable the activated carbon box 14 to tightly push a rubber pad below the pressing frame 15 so as to seal the contact surface, and sealing the sealing cover 1301 to finish the replacement of the activated carbon.

The microprocessor adopts an Edimell 89C51 type singlechip which is used for starting and stopping a motor and controlling an ultraviolet lamp, and 89C51 pins and a connection mode, and technicians in the field can obtain technical inspiration by referring to teaching materials or technical manuals published by manufacturers; the circuit connections according to the utility model are conventional means used by the person skilled in the art and can be suggested by a limited number of tests, which are common knowledge.

Components not described in detail herein are prior art.

Although the present invention has been described in detail with reference to the specific embodiments, the present invention is not limited to the above embodiments, and various changes and modifications without inventive changes may be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.

Claims

1. The utility model provides a coating stoving line exhaust-gas treatment equipment, includes control circuit and control panel, there is microprocessor in the control circuit, microprocessor with control panel electric property links to each other, its characterized in that: the device is characterized by further comprising a gas collecting hood (1), a spray tower (4), a photocatalyst (8) and an activated carbon box (13), wherein the gas collecting hood (1) is connected with the spray tower (4) through a gas collecting pipe (2), a fan (3) is arranged on the gas collecting pipe (2), a liquid discharge pipe is arranged below the spray tower (4), a spray pipe (5) is arranged above the spray tower (4), spray holes are formed in the spray pipe (5), an air outlet pipe (7) is arranged on the top surface of the spray tower (4), a demister (6) is arranged at the pipe orifice of the air outlet pipe (7) in the spray tower (4), the other pipe orifice of the air outlet pipe (7) is connected with the photocatalyst (8), the photocatalyst (8) comprises a shell, an air pipe (9), a pipe plate (10) and a partition plate (11), the partition plate (11) partitions the shell into a U-shaped cavity, the partition plate (11) is provided with a group of pipe plates (10) from top to bottom, at least two tube plates (10) are arranged in each group, air pipes (9) are arranged on the tube plates (10), the air pipes (9) are transparent pipes, photocatalyst is coated on the inner walls of the air pipes, and ultraviolet lamps are arranged on the inner walls of the shells and the partition plates (11); the outlet of the photocatalyst (8) is connected with an activated carbon box (13) through a pipeline, an exhaust pipe is arranged on the bottom surface of the activated carbon box (13), and the microprocessor is electrically connected with the fan (3) and the ultraviolet lamp.

2. The exhaust gas treatment apparatus of a coating drying line according to claim 1, characterized in that: the spray pipe (5) is divided into two branch pipes in the spray tower (4), the branch pipes and the spray pipe (5) are distributed in a cross shape, and spray holes are formed in the bottom surfaces of the branch pipes.

3. The exhaust gas treatment apparatus of a coating drying line according to claim 1, characterized in that: there is photocatalyst case (12) photocatalyst case (8) exit, photocatalyst case (12) bottom is network structure, with photocatalyst case (12) inside with the pipeline is linked together, photocatalyst case (12) right side is equipped with connects mouth of pipe (18), connect mouth of pipe (18) with trachea (9) position is corresponding, the size phase-match, connect mouth of pipe (18) lateral wall to have the gas pocket.

4. The exhaust gas treatment apparatus of a coating drying line according to claim 3, characterized in that: the photocatalyst is titanium dioxide.

5. The exhaust gas treatment apparatus of a coating drying line according to claim 1, characterized in that: the shell of the photocatalyst (8) is a shell with two through ends, and the two ends are connected with end sockets (801) through flanges.

6. The exhaust gas treatment apparatus of a coating drying line according to claim 1, characterized in that: a press frame (15) is arranged in the activated carbon box (13), the press frame (15) is an annular frame and is arranged on the inner wall of the activated carbon box (13), an activated carbon stuffing box (14) is connected below the press frame (15) in a sliding manner, air holes are formed in the top surface and the bottom surface of the activated carbon stuffing box (14), a vertical sliding groove is formed in the side wall of the activated carbon box (13), an ejector rod (16) is connected in the sliding groove in a sliding manner, a lifting mechanism (17) is arranged below the ejector rod (16), and the activated carbon stuffing box (14) is connected on the top surface of the ejector rod (16) in a sliding manner; the side surface of the activated carbon box (13) is connected with a sealing cover (1301) through a flange.

7. The exhaust gas treatment apparatus of a coating drying line according to claim 6, characterized in that: the lifting mechanism (17) is a scissor type lifting mechanism driven by an electric cylinder, and the electric cylinder is electrically connected with the microprocessor.

8. The exhaust gas treatment apparatus of a coating drying line according to claim 6, characterized in that: the bottom surface of the pressing frame (15) is provided with a rubber pad.