VOC waste gas treatment device

Abstract

The utility model discloses a VOC (volatile organic compound) waste gas treatment device, which relates to the technical field of waste gas treatment and comprises a screw machine barrel, a purified water tank and a booster pump, a plurality of exhaust ports are arranged on the screw machine barrel, a plurality of nozzles for spraying devolatilization auxiliaries are arranged on the inner wall of the screw machine barrel, the exhaust ports are communicated with VOC waste gas discharge pipes, and the VOC waste gas discharge pipes are communicated with the purified water tank. The VOC exhaust gas discharge pipe extends into the purification water tank, and the purification water tank is sealed. The water tank cover plate is installed at the top end of the purification water tank and can be detached and separated, the purification water tank can be cleaned more easily in the later period, sealing gaskets are arranged at the top end of the purification water tank and the bottom end of the water tank cover plate to seal the interior of the purification water tank, and VOC waste gas is prevented from being leaked and exhausted from the purification water tank. The water tank water inlet pipe and the VOC waste gas discharge pipe are provided with second electromagnetic valves, so that the water tank can be automatically closed when water does not need to be fed and air does not need to be fed, and the sealing performance of the purification water tank is achieved.

Description

Technical Field

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

[0002] VOC (volatile organic compound) waste gas refers to organic compounds that easily evaporate into the air at normal temperature and pressure. These organic compounds mainly come from industrial production processes, automobile exhaust, furniture manufacturing, painting, printing and other industries. VOC waste gas has potential hazards to the environment and human health. They can participate in atmospheric photochemical reactions to form air pollution problems such as ozone and haze. At the same time, some VOCs are also toxic, such as benzene and formaldehyde.

[0003] The plastic processing procedures generally include batching, molding, joining, assembly, mechanical finishing, etc., among which the molding step is generally completed by a plastic extruder. After plastic molding, there are different degrees of odors. Some of these odors belong to volatile organic compounds, also known as VOCs. The VOC content of plastics is too high, which is easy to affect the health of users. During the plastic processing process, some VOCs will also evaporate and need to be treated. Plastic molding is generally completed in an extruder. The extruder includes a screw and a housing. The screw is arranged in the housing. The housing is provided with a feeding port and an exhaust port. The exhaust port is used to discharge VOCs in the housing. In current workshops, VOC purification equipment is generally not equipped. VOCs are directly discharged, which not only pollutes the environment, but also easily affects human health. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a VOC waste gas treatment device to solve the technical problem that current workshops are generally not equipped with VOC purification equipment, and VOC is directly discharged, which not only pollutes the environment but also easily affects human health.

[0005] To achieve the above purpose, the utility model is implemented through the following technical solutions:

[0006] A VOC waste gas treatment device comprises a screw barrel, a purified water tank and a booster pump, wherein the screw barrel is provided with a plurality of exhaust ports, the inner wall of the screw barrel is provided with a plurality of nozzles for spraying a devolatilizing agent, the exhaust port is connected with a VOC waste gas discharge pipe, the VOC waste gas discharge pipe extends into the purified water tank, the purified water tank is sealed, a sewage discharge pipe is connected in the purified water tank, the sewage discharge pipe is connected with the booster pump; the sewage discharge pipe extends below the liquid surface in the purified water tank; a water tank inlet pipe is provided in the purified water tank, the water tank inlet pipe is connected to an external water source, and the sewage discharge pipe is arranged at the bottom of the purified water tank in the purified water tank.

[0007] As a preferred technical solution of the utility model, a water tank cover is installed on the top of the purified water tank, a sealing gasket is installed at the bottom of the water tank cover and the top of the purified water tank, a plurality of locking bolts are installed on the edge of the water tank cover, and the water tank cover is locked and fixed to the top of the purified water tank by the locking bolts.

[0008] As a preferred technical solution of the utility model, a servo motor is fixedly installed in the middle of the bottom end of the water tank cover, and the servo motor has an output shaft extending downward, and a stirring blade is installed at the bottom end of the output shaft.

[0009] As a preferred technical solution of the present utility model, a heating chamber is provided on the inner wall of the purified water tank, and electric heating pipes are installed inside the heating chamber. The electric heating pipes are U-shaped bends inside the heating chamber, and the electric heating pipes are evenly arranged at equal intervals inside the heating chamber. A control panel is installed on the outer wall of the purified water tank, and the control panel is connected to the electric heating pipes inside the heating chamber.

[0010] As a preferred technical solution of the utility model, running wheels are arranged at the bottom of the purified water tank, and the running wheels are universal wheels.

[0011] As a preferred technical solution of the utility model, a drainage box is provided on the outer wall of the purified water tank, the sewage discharge pipe extends into the drainage box, a sewage outlet connected to the interior of the purified water tank is provided at the bottom of the outer wall of the purified water tank, the top end of the sewage discharge pipe extending into the drainage box is connected to the sewage outlet, and a solenoid valve is installed on the top end of the sewage discharge pipe connected to the sewage outlet.

[0012] As a preferred technical solution of the utility model, a water storage tank is arranged inside the drainage box, a water inlet connected to the water storage tank is arranged at the top of the drainage box, and clean water is installed in the water storage tank.

[0013] As a preferred technical solution of the utility model, a centrifugal pump is arranged at the bottom of the water storage tank.

[0014] As a preferred technical solution of the utility model, a triangular joint is connected to the middle of the sewage discharge pipe extending into the drainage box, and the centrifugal pump is connected to one end of the triangular joint.

[0015] As a preferred technical solution of the utility model, a second solenoid valve is provided on the surface of the VOC exhaust gas emission pipe and the surface of the water tank water inlet pipe.

[0016] The beneficial effects of the utility model are:

[0017] The nozzle of the utility model can spray out a devolatilizing agent, which can improve the volatilization efficiency of VOC, volatilize a large amount of VOC in the plastic, and reduce the VOC content in the plastic. After the VOC in the screw barrel volatilizes, the internal air pressure increases, and the VOC enters the liquid in the purification water tank along the VOC exhaust gas discharge pipe and is absorbed by the liquid. The pressure pump can extract the liquid that absorbs the VOC and carry out the next step of treatment and purification.

[0018] The utility model sets the sewage discharge pipe at the bottom of the purified water tank, which makes it easier to discharge the sewage in the purified water tank, so as to facilitate the later cleaning and maintenance of the purified water tank. The top of the purified water tank is equipped with a water tank cover, which is detachable and easy to clean the purified water tank. The top of the purified water tank and the bottom of the water tank cover are provided with sealing gaskets to seal the inside of the purified water tank, so as to prevent the VOC waste gas from leaking out of the purified water tank. The second solenoid valve is provided on the water inlet pipe and the VOC waste gas discharge pipe of the water tank, so that it can be automatically closed when no water or air is needed, so as to achieve the sealing of the purified water tank. The rotating stirring blade is provided inside the purified water tank, and the stirring blade drives and accelerates the flow of the water liquid in the purified water tank during the rotation process, so that the VOC waste gas is discharged into the water liquid, so that the VOC waste gas value of the water liquid in each unit area of ​​the purified water tank is more uniform. It is conducive to further treatment in the later stage.

[0019] The utility model provides a water storage tank in the drainage box, wherein clean water is stored in the water storage tank, and a centrifugal pump is used to extract the clean water in the water storage tank and inject it into the sewage discharge pipe through a triangular joint, so as to dilute the sewage containing VOC waste gas values. This scheme is used for some sewage containing high concentrations of VOC waste gas values, and this scheme is adopted when dilution treatment is required.

[0020] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a complete structural diagram of the VOC waste gas treatment device of the utility model;

[0022] Figure 2 This is a schematic diagram of the external structure of the water purification tank of the utility model;

[0023] Figure 3 It is a partial cross-sectional structural schematic diagram of the utility model water purification tank;

[0024] In the figure: screw barrel 1, exhaust port 2, nozzle 3, VOC waste gas emission pipe 4, purified water tank 5, heating chamber 501, electric heating pipe 502, walking wheel 503, sewage outlet 504, triangular joint 505, solenoid valve 1 506, centrifugal pump 507, clean water 508, water storage tank 509, drainage tank 510, water filling port 511, water tank cover 512, handle 513, servo motor 514, sealing gasket 515, locking bolt 516, output shaft 517, stirring blade 518, control panel 519, sewage discharge pipe 6, booster pump 7, water tank inlet pipe 8, solenoid valve 2 10. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0028] In the above description of the utility model, it should be noted that the terms "one side", "the other side", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0029] In addition, the term "same" does not mean that the parts must be absolutely the same, but slight differences are allowed. The term "vertical" only means that the positional relationship between the parts is more vertical than "parallel", and does not mean that the structure must be completely vertical, but can be slightly tilted.

[0030] Embodiment 1

[0031] See also Figure 1-3 , which is a technical solution provided by the utility model: a VOC waste gas treatment device, including a screw barrel 1, a purified water tank 5 and a booster pump 7, a plurality of exhaust ports 2 are provided on the screw barrel 1, and a plurality of nozzles for spraying devolatilization aids are provided on the inner wall of the screw barrel 1, and a VOC waste gas discharge pipe 4 is connected to the exhaust port 2, and the VOC waste gas discharge pipe 4 extends into the purified water tank 5, and the purified water tank 5 is sealed, and a sewage discharge pipe 6 is connected to the purified water tank 5, and the sewage discharge pipe 6 is connected to the booster pump 7; the sewage discharge pipe 6 extends below the liquid surface inside the purified water tank 5; a water tank inlet pipe 8 is provided in the purified water tank, and the water tank inlet pipe 8 is connected to an external water source, and the sewage discharge pipe 6 is arranged at the bottom of the purified water tank 5 inside the purified water tank 5.

[0032] The nozzle 3 of the utility model can spray out a devolatilizing agent, which can improve the volatilization efficiency of VOC, volatilize a large amount of VOC in the plastic, and reduce the VOC content in the plastic. After the VOC in the screw barrel 1 volatilizes, its internal air pressure increases, and the VOC enters the liquid in the purified water tank 5 along the VOC exhaust gas discharge pipe 4 and is absorbed by the liquid. The booster pump 7 can extract the liquid that absorbs the VOC and carry out the next step of treatment and purification.

[0033] Among them, a water tank cover 512 is installed at the top of the purified water tank 5, a sealing gasket 515 is installed at the bottom of the water tank cover 512 and the top of the purified water tank 5, and a plurality of locking bolts 516 are installed at the edge of the water tank cover 512. The water tank cover 512 is locked and fixed to the top of the purified water tank 5 by the locking bolts 516. The water tank cover 512 is installed at the top of the purified water tank 5, and the water tank cover 512 is detachable, which makes it easier to clean the purified water tank 5 later. The sealing gasket 515 is provided at the top of the purified water tank 5 and the bottom of the water tank cover 512 to achieve sealing of the inside of the purified water tank 5, so as to prevent VOC waste gas from leaking and being discharged from the purified water tank 5.

[0034] A servo motor 514 is fixedly mounted in the middle of the bottom end of the water tank cover 512 . The servo motor 514 has an output shaft 517 extending downwardly. A stirring blade 518 is mounted at the bottom end of the output shaft 517 .

[0035] By arranging a rotating stirring blade 518 inside the purified water tank 5, the stirring blade 518 drives and accelerates the flow of the water in the purified water tank 5 during rotation, so that the VOC waste gas is discharged into the water, and the VOC waste gas value of the water in each unit area of ​​the purified water tank 5 is more uniform, which is conducive to further processing in the later stage.

[0036] A heating chamber 501 is provided on the inner wall of the purified water tank 5, and an electric heating pipe 502 is installed inside the heating chamber 501. The electric heating pipe 502 is a U-shaped curved pipe inside the heating chamber 501, and the electric heating pipe 502 is evenly arranged at equal intervals inside the heating chamber 501. A control panel 519 is installed on the outer wall of the purified water tank 5, and the control panel 519 is connected to the electric heating pipe 502 inside the heating chamber 501. The electric heating pipe 502 is a heating tungsten wire tube, and the water in the purified water tank 5 is accelerated by the electric heating pipe 502. Water heating helps to increase the activity of the water, so that the water containing VOC waste gas can flow faster in the purified water tank 5, thereby making the water in the purified water tank 5 more evenly mixed.

[0037] The bottom of the purified water tank 5 is provided with a running wheel 503 , which is a universal wheel. The running wheel 503 can support the bottom of the purified water tank 5 , and the running wheel 503 is easy to move.

[0038] Example 2

[0039] See also Figure 1-3 , which is another technical solution provided by the utility model. This embodiment is similar to the above-mentioned embodiment 1, and the similarities are not described in this embodiment. The specific differences are:

[0040] A VOC waste gas treatment device comprises a screw barrel 1, a purified water tank 5 and a booster pump 7. The screw barrel 1 is provided with a plurality of exhaust ports 2. The inner wall of the screw barrel 1 is provided with a plurality of nozzles for spraying a devolatilizing agent. The exhaust ports 2 are connected with a VOC waste gas discharge pipe 4. The VOC waste gas discharge pipe 4 extends into the purified water tank 5. The purified water tank 5 is sealed. A sewage discharge pipe 6 is connected in the purified water tank 5. The sewage discharge pipe 6 is connected with the booster pump 7. The sewage discharge pipe 6 extends below the liquid surface in the purified water tank 5. A water tank inlet pipe 8 is provided in the purified water tank. The water tank inlet pipe 8 is connected to an external water source. The sewage discharge pipe 6 is arranged at the bottom of the purified water tank 5 in the purified water tank 5.

[0041] The nozzle 3 of the utility model can spray out a devolatilizing agent, which can improve the volatilization efficiency of VOC, volatilize a large amount of VOC in the plastic, and reduce the VOC content in the plastic. After the VOC in the screw barrel 1 volatilizes, its internal air pressure increases, and the VOC enters the liquid in the purified water tank 5 along the VOC exhaust gas discharge pipe and is absorbed by the liquid. The booster pump 7 can extract the liquid that absorbs the VOC and carry out the next step of treatment and purification.

[0042] The outer wall of the purified water tank 5 is provided with a drainage box 510, and the sewage discharge pipe 6 extends into the drainage box 510. A sewage outlet 504 connected to the inside of the purified water tank 5 is provided at the bottom of the outer wall of the purified water tank 5. The top of the sewage discharge pipe 6 extending into the drainage box 510 is connected to the sewage outlet 504. The top of the sewage discharge pipe 6 connected to the sewage outlet 504 is installed with a solenoid valve 506 to control whether the sewage outlet 504 discharges the water containing VOC waste gas in the purified water tank 5.

[0043] A water storage tank 509 is disposed inside the drainage box 510 , and a water inlet 511 connected to the water storage tank 509 is disposed at the top of the drainage box 510 , and clean water 508 is installed in the water storage tank 509 .

[0044] A centrifugal pump 507 is provided at the bottom of the water storage tank 509 , and a triangular joint 505 is connected to the middle of the sewage discharge pipe 6 extending into the drainage tank 510 , and the centrifugal pump 507 is connected to one end of the triangular joint 505 .

[0045] The utility model provides a water tank 509 in the drainage box, in which clean water 508 is stored, and a centrifugal pump 507 is used to extract the clean water 508 in the water tank 509 and inject it into the sewage discharge pipe 6 through a triangular joint 505, so as to dilute the sewage containing VOC waste gas values. This solution is used for some sewage containing high concentrations of VOC waste gas values, and this solution is adopted when dilution treatment is required.

[0046] The surface of the VOC waste gas emission pipe 4 and the surface of the water tank water inlet pipe 8 are both provided with a solenoid valve 10, which can be automatically closed when no water intake or air intake is required.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A VOC waste gas treatment device, comprising a screw barrel (1), a purified water tank (5) and a pressure pump (7), characterized in that: The screw barrel (1) is provided with a plurality of exhaust ports (2), the inner wall of the screw barrel (1) is provided with a plurality of nozzles for spraying out the devolatilization aid, the exhaust ports (2) are connected with a VOC waste gas discharge pipe (4), the VOC waste gas discharge pipe (4) extends into a purified water tank (5), the purified water tank (5) is sealed, a sewage discharge pipe (6) is connected inside the purified water tank (5), the sewage discharge pipe (6) is connected with a booster pump (7); the sewage discharge pipe (6) extends below the liquid surface inside the purified water tank (5); a water tank inlet pipe (8) is provided inside the purified water tank, the water tank inlet pipe (8) is connected to an external water source, and the sewage discharge pipe (6) is arranged at the bottom of the purified water tank (5) inside the purified water tank (5).

2. A VOC waste gas treatment device according to claim 1, characterized in that: A water tank cover (512) is installed at the top of the purified water tank (5); a sealing gasket (515) is installed between the bottom of the water tank cover (512) and the top of the purified water tank (5); a plurality of locking bolts (516) are installed at the edge of the water tank cover (512); and the water tank cover (512) is locked and fixed to the top of the purified water tank (5) by the locking bolts (516).

3. A VOC waste gas treatment device according to claim 2, characterized in that: A servo motor (514) is fixedly mounted at the middle of the bottom end of the water tank cover plate (512), and an output shaft (517) extends downward from the servo motor (514), and a stirring blade (518) is mounted at the bottom end of the output shaft (517).

4. A VOC waste gas treatment device according to claim 2, characterized in that: The inner wall of the purified water tank (5) is provided with a heating chamber (501), and an electric heating pipe (502) is installed inside the heating chamber (501). The electric heating pipe (502) is a U-shaped curved pipe inside the heating chamber (501), and the electric heating pipe (502) is evenly arranged at equal intervals inside the heating chamber (501). A control panel (519) is installed on the outer wall of the purified water tank (5), and the control panel (519) is connected to the electric heating pipe (502) inside the heating chamber (501).

5. A VOC waste gas treatment device according to claim 2, characterized in that: The bottom of the purified water tank (5) is provided with a running wheel (503), and the running wheel (503) is a universal wheel.

6. A VOC waste gas treatment device according to claim 2, characterized in that: The outer wall of the purified water tank (5) is provided with a drainage box (510), the sewage discharge pipe (6) extends into the drainage box (510), and the bottom of the outer wall of the purified water tank (5) is provided with a sewage outlet (504) connected to the interior of the purified water tank (5), the top end of the sewage discharge pipe (6) extending into the drainage box (510) is connected to the sewage outlet (504), and the top end of the sewage discharge pipe (6) connected to the sewage outlet (504) is installed with a solenoid valve (506).

7. A VOC waste gas treatment device according to claim 6, characterized in that: A water storage tank (509) is arranged inside the drainage box (510), and a water inlet (511) connected to the water storage tank (509) is arranged at the top of the drainage box (510), and clean water (508) is installed in the water storage tank (509).

8. A VOC waste gas treatment device according to claim 7, characterized in that: A centrifugal pump (507) is provided at the bottom of the water storage tank (509).

9. A VOC waste gas treatment device according to claim 8, characterized in that: A triangular joint (505) is connected to the middle of the sewage discharge pipe (6) extending into the drainage box (510), and the centrifugal pump (507) is connected to one end of the triangular joint (505).

10. A VOC waste gas treatment device according to claim 1, characterized in that: Solenoid valve 2 (10) is provided on the surface of the VOC waste gas emission pipe (4) and the surface of the water tank water inlet pipe (8).

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