Waste plastic pyrolysis flue gas purification equipment

Abstract

The utility model relates to the technical field of flue gas purification treatment equipment, in particular to waste plastic pyrolysis flue gas purification equipment which comprises a purification box, a cooling device and a filtering device, a flue gas inlet pipe is mounted at the bottom end of the purification box, a first fan is mounted on the flue gas inlet pipe, a flue gas outlet pipe is mounted at the top end of the purification box, and a second fan is mounted on the flue gas outlet pipe. The cooling device and the filtering device are installed in an inner cavity of the purifying box from bottom to top, the cooling device comprises a refrigerator, a cooling plate and a through hole, and a refrigerant circularly flows in a cooling channel and absorbs and takes away heat in smoke, so that the temperature of the smoke is rapidly reduced, the cooling efficiency is improved, and the energy consumption is reduced. The cooled flue gas continues to rise through the through holes formed in the cooling plate and enters the filtering device, the multiple layers of filtering plates including the first filtering plate, the second filtering plate and the third filtering plate in the filtering frame, the filtering plates have different filtering precision and materials, and particulate matter, harmful gas and other impurities in the flue gas can be removed layer by layer.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas purification and treatment equipment, in particular to a waste plastic pyrolysis flue gas purification equipment. Background Technique

[0002] As is well known, with the continuous development of waste plastic treatment technology, pyrolysis, as an effective resource recovery method, has been widely used in the field of waste plastic treatment. However, the flue gas generated during pyrolysis often contains a large amount of particulate matter, harmful gases and odor molecules. If these pollutants are directly discharged into the environment, they will have an impact on the ecological environment and human health.

[0003] Traditional flue gas purification equipment often has problems such as low cooling efficiency, poor purification effect, and insufficient equipment stability. For example, in terms of flue gas cooling, some equipment uses natural cooling or simple water spraying methods. This method has limited cooling effect and is likely to cause an increase in the water content in the flue gas, affecting the subsequent treatment effect. At the same time, traditional filtering devices often use a single layer of filtering material, with limited filtering accuracy and difficulty in effectively intercepting various pollutants in the flue gas. Content of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the utility model provides a waste plastic pyrolysis flue gas purification equipment.

[0006] (2) Technical Solutions

[0007] To achieve the above object, the utility model provides the following technical solutions: A waste plastic pyrolysis flue gas purification device, including a purification box, a cooling device and a filtering device. A smoke inlet pipe is installed at the bottom end of the purification box, and a first fan is installed on the smoke inlet pipe. A smoke outlet pipe is installed at the top end of the purification box. The cooling device and the filtering device are respectively installed in the inner cavity of the purification box from bottom to top. The cooling device includes a refrigerator, a cooling plate and through holes. The cooling plate is installed in the lower part of the inner cavity of the purification box. A number of the uniformly arranged through holes are opened on the cooling plate. A number of cooling channels are arranged inside the cooling plate. The refrigerator is installed on the outer wall of the purification box. An inlet liquid pipe and an outlet liquid pipe are respectively installed at the front and back of the top end of the refrigerator. A water pump is installed on the inlet liquid pipe. The inlet liquid pipe and the outlet liquid pipe respectively penetrate the side wall of the purification box and are connected with the cooling channels. The filtering device includes a filtering frame, a U-shaped frame, a first filter plate, a second filter plate and a third filter plate. The U-shaped frame is fixedly installed in the upper part of the inner cavity of the purification box. The filtering frame is installed at the top end of the U-shaped frame through a connecting device. The first filter plate is installed at the inner bottom of the filtering frame, and the second filter plate and the third filter plate are successively installed at the top end of the first filter plate. A maintenance door corresponding to the filtering device is installed on the front outer wall of the purification box.

[0008] To prevent the discharge of flue gas that does not meet the standard, the utility model is improved in that a return pipe is installed at one end of the purification box away from the refrigerator, a second fan is installed at the end of the return pipe, an on-line detector is installed on the top wall of the inner cavity of the purification box, a solenoid valve is installed on the smoke outlet pipe, a controller is installed on the outer wall of the purification box, and the solenoid valve, the on-line detector and the second fan are all electrically connected to the controller.

[0009] To facilitate the disassembly and assembly of the filtering frame, the utility model is improved in that the connecting device includes a T-shaped block and a T-shaped groove. Two groups of T-shaped blocks are symmetrically installed on the left and right of the bottom wall of the filtering frame, and two groups of T-shaped grooves are symmetrically opened on the left and right of the top end of the U-shaped frame, and the T-shaped grooves are adapted to the T-shaped blocks.

[0010] Preferably, the utility model is improved in that the first filter plate is a non-woven fabric layer.

[0011] Preferably, the utility model is improved in that the second filter plate is a glass fiber filter cotton layer.

[0012] Preferably, the utility model is improved in that the third filter plate is an activated carbon layer.

[0013] To facilitate the observation of the working state inside the purification box, the utility model is improved in that an observation window is installed on the maintenance door.

[0014] In order to ensure the stable support of the purification box, the present utility model is improved in that support legs are installed at the four corners of the bottom end of the purification box.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the present utility model provides a waste plastic pyrolysis flue gas purification device, which has the following beneficial effects:

[0017] In this waste plastic pyrolysis flue gas purification device, through the set cooling device, the refrigerator in the cooling device is connected to the cooling channels inside the cooling plate through the liquid inlet pipe and the liquid outlet pipe. When the water pump is started, the refrigerant circulates in the cooling channels, effectively absorbing and taking away the heat in the flue gas, thereby rapidly reducing the temperature of the flue gas. The activity of particulate matter and harmful gases in the cooled flue gas is reduced, making them easier to remove in the subsequent treatment process.

[0018] In this waste plastic pyrolysis flue gas purification device, through the set filtering device, each layer of filter plate in the filter frame has its specific filtering accuracy, and can effectively intercept particulate matter with different particle sizes and different types of pollutants. The non-woven fabric layer initially filters out larger particulate matter, the fiberglass filter cotton layer further removes fine particulate matter and dust, while the activated carbon layer focuses on adsorbing harmful gases and odor molecules, thereby realizing the deep purification of the flue gas. The design of multi-stage filtration improves the purification efficiency.

[0019] In this waste plastic pyrolysis flue gas purification device, through the set return pipe, on-line detector, controller, solenoid valve and second fan, the on-line detector can real-time monitor the quality of the filtered flue gas in the purification box. Once it is found that a certain index exceeds the preset standard, the information is immediately fed back to the controller. The controller then quickly makes a response according to the preset program logic, closes the solenoid valve and starts the second fan, realizing the immediate interception and return treatment of unqualified flue gas. This ability of immediate response and efficient treatment effectively avoids the direct emission of unqualified flue gas and ensures environmental safety.

[0020] In this waste plastic pyrolysis flue gas purification device, through the set connecting device, the structural design of the T-shaped block and the T-shaped groove enables them to form a tight fit when connected and are not easy to loosen. This stable connection method ensures that the filter frame can remain stable during operation and is not easy to shift or fall off, thereby ensuring the continuity and stability of the purification system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0022] Figure 2 is a half-sectional three-dimensional structure schematic diagram of the purification box of the present utility model;

[0023] Figure 3 This is a schematic perspective view of the half-section of the cooling plate of the present utility model;

[0024] Figure 4 This is a schematic perspective view of the half-section of the filter box, the first filter plate, the second filter plate, and the third filter plate of the present utility model.

[0025] In the figure: 1, purification box; 2, smoke inlet pipe; 3, first fan; 4, smoke outlet pipe; 5, cooler; 6, cooling plate; 7, through hole; 8, cooling channel; 9, liquid inlet pipe; 10, liquid outlet pipe; 11, water pump; 12, filter box; 13, U-shaped frame; 14, first filter plate; 15, second filter plate; 16, third filter plate; 17, inspection door; 18, return pipe; 19, second fan; 20, on-line detector; 21, solenoid valve; 22, controller; 23, T-shaped block; 24, T-shaped groove; 25, observation window; 26, support leg. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0027] Please refer to Figures 1-4, a waste plastic pyrolysis flue gas purification device, comprising a purification box 1, a cooling device and a filtering device. A smoke inlet pipe 2 is installed at the bottom end of the purification box 1, and a first fan 3 is installed on the smoke inlet pipe 2. A smoke outlet pipe 4 is installed at the top end of the purification box 1. The cooling device and the filtering device are respectively installed in the inner cavity of the purification box 1 from bottom to top. The cooling device includes a refrigerator 5, a cooling plate 6 and through holes 7. The cooling plate 6 is installed in the lower part of the inner cavity of the purification box 1. A number of the uniformly arranged through holes 7 are formed on the cooling plate 6. A number of cooling channels 8 are arranged inside the cooling plate 6. The refrigerator 5 is installed on the outer wall of the purification box 1. The inlet liquid pipe 9 and the outlet liquid pipe 10 are respectively installed at the front and back of the top end of the refrigerator 5. A water pump 11 is installed on the inlet liquid pipe 9. The inlet liquid pipe 9 and the outlet liquid pipe 10 respectively penetrate through the side wall of the purification box 1 and are connected to the cooling channels 8. The filtering device includes a filtering frame 12, a U-shaped frame 13, a first filter plate 14, a second filter plate 15 and a third filter plate 16. The U-shaped frame 13 is fixedly installed in the upper part of the inner cavity of the purification box 1. The filtering frame 12 is installed on the top end of the U-shaped frame 13 through a connecting device. The first filter plate 14 is installed at the bottom of the inner part of the filtering frame 12, and the second filter plate 15 and the third filter plate 16 are successively installed at the top end of the first filter plate 14. A maintenance door 17 corresponding to the filtering device is installed on the front outer wall of the purification box 1. In this embodiment, during use, the flue gas generated during the pyrolysis of waste plastics first enters the purification box 1 through the smoke inlet pipe 2. The first fan 3 installed on the smoke inlet pipe 2 provides power for the flue gas to ensure its smooth entry into the interior of the purification box 1. After entering the purification box 1, the flue gas first passes through the cooling device. The refrigerator 5 is connected to the cooling channels 8 inside the cooling plate 6 through the inlet liquid pipe 9 and the outlet liquid pipe 10. The water pump 11 is started, and the refrigerant circulates in the cooling channels 8, absorbs and takes away the heat in the flue gas, rapidly reduces the temperature of the flue gas, and improves the cooling efficiency. The flue gas after cooling and temperature reduction continues to rise through the through holes 7 formed on the cooling plate 6 and enters the filtering device. The multi-layer filter plates (the first filter plate 14, the second filter plate 15 and the third filter plate 16) in the filtering frame 12 have different filtering precisions and materials, and can layer by layer remove particulate matters, harmful gases and other impurities in the flue gas. The filtering frame 12 is installed on the U-shaped frame 13 through a connecting device, which is convenient for disassembly and maintenance. The flue gas after filtering and purification becomes relatively clean and finally is discharged from the purification box 1 through the smoke outlet pipe 4.

[0028] During actual use, to further prevent the discharge of flue gas that does not meet the standards, in this embodiment, a reflux pipe 18 is installed at one end of the purification box 1 away from the cooler 5. A second fan 19 is installed at the end of the reflux pipe 18. An online detector 20 is installed on the top wall of the inner cavity of the purification box 1. A solenoid valve 21 is installed on the smoke outlet pipe 4. A controller 22 is installed on the outer wall of the purification box 1. The solenoid valve 21, the online detector 20, and the second fan 19 are all electrically connected to the controller 22. The online detector 20 can monitor the quality of the filtered flue gas in the purification box 1 in real time, including key parameters such as its composition and concentration. Once it detects that a certain index in the flue gas exceeds the preset qualified standard, the online detector 20 will immediately feedback this information to the controller 22. After receiving the feedback from the online detector 20, the controller 22 will quickly react according to the preset program logic, close the solenoid valve 21 on the smoke outlet pipe 4 to prevent the unqualified flue gas from being directly discharged, and the controller 22 will immediately start the second fan 19 to suck the unqualified flue gas back into the purification box 1 through the reflux pipe 18 for re-treatment.

[0029] During actual use, to further facilitate the disassembly and assembly of the filter frame 12, in this embodiment, the connecting device includes a T-shaped block 23 and a T-shaped groove 24. Two groups of the T-shaped blocks 23 are symmetrically installed on the bottom wall of the left and right sides of the filter frame 12. Two groups of the T-shaped grooves 24 are symmetrically opened at the top of the U-shaped frame 13. The T-shaped groove 24 is adapted to the T-shaped block 23. The structural characteristics of the T-shaped block 23 and the T-shaped groove 24 determine that they have a good positioning effect when connected. Although the disassembly and assembly process is simple, the connection method of the T-shaped block 23 and the T-shaped groove 24 is very stable. Once the T-shaped block 23 is completely inserted into the T-shaped groove 24, they will form a tight fit and are not easy to loosen. This stable connection method ensures that the filter frame 12 can remain stable during operation and is not easy to shift or fall off. The shape of the T-shaped block 23 matches the T-shaped groove 24, which can ensure that the filter frame 12 can be accurately positioned on the U-shaped frame 13 during installation, avoiding problems such as insecure installation or poor sealing caused by position deviation.

[0030] Preferably, in this embodiment, the first filter plate 14 is a non-woven fabric layer. The non-woven fabric filter material has a high filtration efficiency, can effectively filter out fine particles and suspended substances in the flue gas, and reduce the content of solid pollutants in the flue gas. The non-woven fabric has good air permeability, which can ensure that gas can flow smoothly during the filtration process, reduce the filtration resistance, and improve the filtration efficiency.

[0031] Preferably, in this embodiment, the second filter plate 15 is a fiberglass filter cotton layer. Fiberglass filter cotton is famous for its stable performance and high efficiency. The average filtration rate for visible substances can reach over 95%, which means it can effectively remove tiny particulate matters, dust and other impurities in the flue gas, ensuring the quality of the discharged flue gas.

[0032] Preferably, in this embodiment, the third filter plate 16 is an activated carbon layer. Due to its porous structure and large specific surface area, activated carbon has extremely strong adsorption ability. It can effectively adsorb harmful gases, volatile organic compounds (VOCs), odor molecules, etc. in the flue gas, thereby purifying the flue gas and improving the emission quality. The activated carbon layer can not only remove tiny particulate matters in the flue gas, but also effectively remove odors and harmful gases such as sulfur dioxide (SO2), nitrogen oxides (NOx), etc., making the discharged flue gas cleaner and harmless.

[0033] During the actual use process, to further facilitate observing the working state inside the purification box 1, in this embodiment, an observation window 25 is installed on the inspection door 17. The observation window 25 allows operators or maintenance personnel to directly observe the working state inside the purification box 1 without opening the inspection door 17.

[0034] During the actual use process, to further ensure the stable support of the purification box 1, in this embodiment, support legs 26 are installed at the four corners of the bottom end of the purification box 1. The support legs 26 can disperse the weight of the purification box 1, making it more firmly placed on the ground.

[0035] To illustrate in detail the possible application scenarios, technical principles, specific implementable solutions, achievable purposes and effects of this application, etc., the following will be described in detail with reference to the specific embodiments listed and in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of this application, so they are only examples and cannot be used to limit the protection scope of this application.

[0036] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waste plastic pyrolysis flue gas purification device, comprising a purification box (1), a cooling device and a filtering device, characterized in that: A smoke inlet pipe (2) is installed at the bottom end of the purification box (1), a first fan (3) is installed on the smoke inlet pipe (2), a smoke outlet pipe (4) is installed at the top end of the purification box (1), the cooling device and the filtering device are respectively installed in the inner cavity of the purification box (1) from bottom to top. The cooling device includes a refrigerator (5), a cooling plate (6) and through holes (7). The cooling plate (6) is installed at the lower part of the inner cavity of the purification box (1), and a number of uniformly arranged through holes (7) are formed in the cooling plate (6). A number of cooling channels (8) are arranged inside the cooling plate (6). The refrigerator (5) is installed on the outer wall of the purification box (1). An inlet liquid pipe (9) and an outlet liquid pipe (10) are respectively installed at the front and back of the top end of the refrigerator (5). A water pump (11) is installed on the inlet liquid pipe (9). The inlet liquid pipe (9) and the outlet liquid pipe (10) respectively penetrate through the side wall of the purification box (1) and are connected to the cooling channels (8). The filtering device includes a filtering frame (12), a U-shaped frame (13), a first filter plate (14), a second filter plate (15) and a third filter plate (16). The U-shaped frame (13) is fixedly installed at the upper part of the inner cavity of the purification box (1). The filtering frame (12) is installed at the top end of the U-shaped frame (13) through a connecting device. The first filter plate (14) is installed at the inner bottom of the filtering frame (12), and the second filter plate (15) and the third filter plate (16) are successively installed at the top end of the first filter plate (14). A maintenance door (17) corresponding to the filtering device is installed on the front outer wall of the purification box (1).

2. The waste plastic pyrolysis flue gas purification equipment according to claim 1, wherein: A return pipe (18) is installed at one end of the purification box (1) far away from the refrigerator (5). A second fan (19) is installed at the end of the return pipe (18). An on-line detector (20) is installed on the top wall of the inner cavity of the purification box (1). An electromagnetic valve (21) is installed on the smoke outlet pipe (4). A controller (22) is installed on the outer wall of the purification box (1). The electromagnetic valve (21), the on-line detector (20) and the second fan (19) are all electrically connected to the controller (22).

3. The waste plastic pyrolysis flue gas purification equipment according to claim 2, characterized in that: The connecting device includes a T-shaped block (23) and a T-shaped groove (24). Two groups of T-shaped blocks (23) are symmetrically installed on the left and right of the bottom wall of the filtering frame (12). Two groups of T-shaped grooves (24) are symmetrically formed on the left and right of the top end of the U-shaped frame (13). The T-shaped groove (24) is adapted to the T-shaped block (23).

4. The waste plastic pyrolysis flue gas purification equipment according to claim 3, characterized in that: The first filter plate (14) is a non-woven fabric layer.

5. A waste plastic pyrolysis flue gas purification device according to claim 4, characterized in that: The second filter plate (15) is a glass fiber filter cotton layer.

6. The pyrolysis flue gas purification equipment for waste plastics according to claim 5, characterized in that: The third filter plate (16) is an activated carbon layer.

7. A waste plastic pyrolysis flue gas purification device according to claim 6, characterized in that: An observation window (25) is installed on the maintenance door (17).

8. A waste plastic pyrolysis flue gas purification device according to claim 7, characterized in that: Support legs (26) are installed at the four corners of the bottom end of the purification box (1).

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