Waste gas treatment spray tower for waste paper raw material production and waste gas treatment method

Abstract

The present invention relates to the field of spraying technology, and in particular to a waste gas treatment spray tower for waste paper raw material production, comprising a tower body, a discharge pipe is fixedly arranged on the upper end of the tower body, a water tank is fixedly connected to the surface of one side of the tower body near the lower end, an inspection door is movably installed on the upper surface of the water tank, a semi-cylindrical shell is formed at a height position corresponding to the water tank on the surface of the tower body corresponding to the height position of the water tank, an air inlet pipe is fixedly installed on the surface of the tower body away from the water tank, and the height of the air inlet pipe is located above the water tank, a scraper is slidably installed on the inner wall of the tower body near the lower part of the air inlet pipe, and a wind plate is rotatably connected to the upper end of the scraper; a waste gas treatment method is also proposed. Compared with a traditional spray tower, the present invention has a preliminary spraying function and improves the waste gas treatment effect; it has the function of cleaning the inner wall of the tower body and the edge of the liquid surface to prevent the problem of crusting at this position, which is beneficial to later cleaning and maintenance; the staff only needs to regularly salvage and clean the crust at the inspection door, and the maintenance is convenient.

Description

Technical Field

[0001] The invention relates to the field of spraying technology, in particular to a waste gas treatment spray tower for waste paper raw material production and a waste gas treatment method. Background Art

[0002] The waste gas produced during the processing of waste paper raw materials has complex and diverse components, mainly including organic compounds such as benzene, toluene, xylene, acetone, ethyl acetate, cyclohexanone, alcohols, etc. These compounds mainly come from the volatilization and decomposition of additives such as ink, coatings, adhesives, etc. in the waste paper raw materials. In addition, the waste gas contains paper dust. These dusts are mainly composed of fine paper fibers and particles. In the process of waste paper processing, waste gas treatment is an important link, among which spraying technology is a common waste gas treatment method. Spraying treatment can effectively remove harmful substances in waste gas, purify waste gas and meet environmental emission standards.

[0003] Spray tower is a commonly used equipment in spray technology. Its working principle is to introduce waste gas into the spray tower, and the liquid sprayed by the spray head (such as clean water, alkaline solution or specific chemical reagent) will contact the waste gas. In this process, the harmful substances in the waste gas will react physically or chemically with the spray liquid, such as dissolution, neutralization or oxidation, so as to achieve the purpose of removing pollutants.

[0004] The problem of crusting on the liquid surface in the waste paper processing waste gas spray tower is a challenge that may be encountered in actual operations. The crusting phenomenon is mainly caused by the accumulation of paper scraps and dust on the liquid surface and the reaction between certain components in the spray liquid and substances in the waste gas. These substances gradually accumulate on the liquid surface to form crusts, which makes subsequent maintenance quite inconvenient, especially for the lower position inside the tower body. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings existing in the background technology, and to propose a waste gas treatment spray tower and a waste gas treatment method for waste paper raw material production.

[0006] In order to achieve the above purpose, the technical scheme adopted by the present invention is as follows: a waste gas treatment spray tower for waste paper raw material production includes a tower body, a discharge pipe is fixedly arranged on the upper end of the tower body, a water tank is fixedly connected to the surface of one side of the tower body near the lower end, an inspection door is movably installed on the upper surface of the water tank, a semi-cylindrical shell is formed at the height position of the surface of the tower body corresponding to the water tank, an air inlet pipe is fixedly installed on the surface of the tower body on the side away from the water tank, and the height of the air inlet pipe is located above the water tank, a scraper is slidably installed on the inner wall of the tower body near the lower part of the air inlet pipe, an air plate is rotatably connected to the upper end of the scraper, a plurality of guide plates are arranged on the outer surfaces of both sides of the air plate, a plurality of spray mechanisms are arranged on the inner side of the tower body near the upper end, an arc-shaped channel is connected to the outer port of the spray mechanism, a narrow opening is opened on the edge of the arc-shaped channel, and the opening direction of the narrow opening is toward the side away from the water tank;

[0007] The spray liquid enters the arc-shaped channel and is discharged through the narrow opening to form a water curtain along the inner wall of the tower body.

[0008] Preferably, the spray mechanism includes an injection pipe fixedly embedded in the outer surface of the tower body, the lower end of the injection pipe is fixedly connected to a main pipe, the two side surfaces of the main pipe are respectively fixedly connected to a plurality of branch pipes, the outer surfaces of the branch pipes are fixedly provided with a plurality of nozzles, the ports of the plurality of branch pipes close to one side are fixedly connected to the surface of the arc-shaped channel, the upper surface of the main pipe is fixedly installed with a mounting frame, and the two ends of the mounting frame are respectively fixedly connected to the inner wall of the tower body.

[0009] Preferably, the front ends of several of the injection pipes are fixedly connected to a water pipe, the lower end of the water pipe is connected to the water outlet of the water pump, the water inlet of the water pump is connected to the inner side of the water tank through the pipe body, and the water pump is fixedly installed on one side of the water tank.

[0010] Preferably, the upper and lower surfaces of the arc-shaped channel are respectively provided with curved surfaces, and a plurality of stabilizing blocks are fixedly provided in the port of the narrow opening.

[0011] Preferably, the outer surface of the scraper strip is provided with a plurality of guide openings, an arc-shaped guide strip is slidably inserted into the inner side of each guide opening, both ends of the arc-shaped guide strip are respectively fixedly connected with bent ends, and the ends of the bent ends are fixedly connected to the inner wall of the tower body.

[0012] Preferably, the upper end of the scraper strip is fixedly connected to a connecting seat, and a rotating shaft is passed through the connecting seat and the upper surface of the scraper strip for common movement, and an anti-slip block is fixedly connected to the lower end of the rotating shaft, and the anti-slip block cooperates with the internal rotation of the scraper strip, and the upper end of the rotating shaft is fixedly connected to the lower edge of the wind plate.

[0013] Preferably, fixing blocks are fixedly provided on both sides of the upper surface of the connecting seat close to the wind plate, and a stopper is movably mounted on one side of the fixing block close to the wind plate through an elastic mechanism.

[0014] Preferably, the elastic mechanism includes no less than two jacks opened on the side of the fixed block, a buffer spring is arranged on the inner side of the jack, a T-shaped rod is slidably inserted into the port of the jack, and one end of several T-shaped rods are fixedly connected to the side of the block.

[0015] Preferably, a maintenance ladder is fixedly installed on the outer surface of the tower body, and a liquid regulating pipe is fixedly installed on the upper surface of the water tank on a side close to the maintenance door.

[0016] A method for treating waste gas, using the above-mentioned device, comprises the following steps:

[0017] S1. The exhaust pipe port is connected to the port of the air inlet pipe, spray liquid is added to the water tank and the distance between the liquid level and the top surface of the water tank needs to be greater than one meter;

[0018] S2. After the exhaust gas is introduced into the inner side of the tower, the spray mechanism works to spray, and the treated exhaust gas is discharged through the exhaust pipe;

[0019] S3. The staff regularly opens the inspection door to salvage and clean the crust on the liquid surface.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. Compared with the traditional spray tower, the present invention has the function of preliminary spraying and improves the waste gas treatment effect;

[0022] 2. It can clean the inner wall of the tower body and the edge of the liquid surface to prevent the problem of crusting at this position, which is conducive to later cleaning and maintenance;

[0023] 3. The staff only needs to salvage and clean the crust at the inspection door regularly, which is convenient for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of a waste gas treatment spray tower for waste paper raw material production according to the present invention;

[0025] Figure 2 A cross-sectional view of a waste gas treatment spray tower for waste paper raw material production according to the present invention;

[0026] Figure 3 The invention relates to a waste gas treatment spray tower for waste paper raw material production. Figure 2 Enlarged view of point A in the middle;

[0027] Figure 4 It is a schematic diagram of the spray mechanism of the waste gas treatment spray tower for waste paper raw material production of the present invention;

[0028] Figure 5 It is a cross-sectional view of the arc-shaped path of the waste gas treatment spray tower for waste paper raw material production of the present invention;

[0029] Figure 6 The invention relates to a waste gas treatment spray tower for waste paper raw material production. Figure 5 Enlarged view of point B in the middle;

[0030] Figure 7 It is a cross-sectional view of the scraper strip of the waste gas treatment spray tower for waste paper raw material production of the present invention;

[0031] Figure 8 The invention relates to a waste gas treatment spray tower for waste paper raw material production. Figure 7 Enlarged view of point C in the middle;

[0032] Fig. 9 This is a cross-sectional view of the fixed block of the waste gas treatment spray tower for waste paper raw material production of the present invention.

[0033] 1. Tower body; 2. Water tank; 3. Liquid regulating pipe; 4. Discharge pipe; 5. Maintenance ladder; 6. Maintenance door; 7. Air inlet pipe; 8. Scraper strip; 9. Curved guide strip; 10. Bending end; 11. Wind plate; 12. Guide plate; 13. Rotating shaft; 14. Anti-slip block; 15. Guide port; 16. Water pipe; 17. Water pump; 18. Injection pipe; 19. Main pipe; 20. Branch pipe; 21. Nozzle; 22. Curved channel; 23. Curved surface; 24. Narrow mouth; 25. Stabilizing block; 26. Connecting seat; 27. Fixing block; 28. Stopper; 29. ​​Socket; 31. T-bar; 32. Buffer spring; 33. Mounting frame. DETAILED DESCRIPTION

[0034] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0035] like Figure 1-Figure 9 The waste gas treatment spray tower for waste paper raw material production shown in the figure comprises a tower body 1, a discharge pipe 4 is fixedly arranged at the upper end of the tower body 1, a water tank 2 is fixedly connected to the surface of one side of the tower body 1 near the lower end, an inspection door 6 is movably installed on the upper surface of the water tank 2, and the inspection door 6 can be installed by hinges, the surface of the tower body 1 at the height position corresponding to the water tank 2 is a semi-cylindrical shell, an air inlet pipe 7 is fixedly installed on the surface of the side of the tower body 1 away from the water tank 2, and the height of the air inlet pipe 7 is located above the water tank 2, a scraper 8 is slidably installed on the inner wall of the tower body 1 near the lower part of the air inlet pipe 7, the upper end of the scraper 8 is rotatably connected to the wind plate 11, and the outer surfaces of both sides of the wind plate 11 are provided with a plurality of guide plates 12, and a plurality of spray mechanisms are arranged on the inner side of the tower body 1 near the upper end, and the outer port of the spray mechanism is connected with an arc channel 22, and a narrow opening 24 is opened on the edge of the arc channel 22, and the opening direction of the narrow opening 24 is toward the side away from the water tank 2;

[0036] The spray liquid enters the arc channel 22 and is discharged through the narrow opening 24 to form a water curtain along the inner wall of the tower body 1 .

[0037] like Figure 2 , Figure 4 , Figure 5 As shown, the spray mechanism includes an injection pipe 18 fixedly embedded in the outer surface of the tower body 1, the lower end of the injection pipe 18 is fixedly connected to a main pipe 19, and the two side surfaces of the main pipe 19 are respectively fixedly connected to a plurality of branch pipes 20, and the outer surface of the branch pipe 20 is fixedly provided with a plurality of nozzles 21, and the ports of the plurality of branch pipes 20 close to one side are fixedly connected to the surface of the arc channel 22, and a mounting frame 33 is fixedly installed on the upper surface of the main pipe 19, and the two ends of the mounting frame 33 are respectively fixedly connected to the inner wall of the tower body 1, and the mounting frame 33 is used to ensure the structural stability of the main pipe 19.

[0038] like Figure 1As shown, the front ends of several injection pipes 18 are fixedly connected to a water pipe 16, the lower end of the water pipe 16 is connected to the water outlet of a water pump 17, the water inlet of the water pump 17 is connected to the inner side of the water tank 2 through a pipe body, and the water pump 17 is fixedly installed on one side of the water tank 2, which can realize spray circulation and reduce costs.

[0039] like Figure 5 , Figure 6 As shown, the upper and lower surfaces of the arc channel 22 are respectively provided with curved surfaces 23, and a plurality of stabilizing blocks 25 are fixedly provided in the port of the narrow opening 24, and the stabilizing blocks 25 are used to increase the strength of the narrow opening 24 to prevent the narrow opening 24 from being deformed after being impacted by liquid.

[0040] like Figure 2 , Figure 3 , Figure 7 , Figure 8 As shown, the outer surface of the scraper bar 8 is provided with a plurality of guide openings 15, and an arc-shaped guide bar 9 is slidably inserted into the inner side of each guide opening 15. The two ends of the arc-shaped guide bar 9 are respectively fixedly connected with bent ends 10, and the ends of the bent ends 10 are fixedly connected to the inner wall of the tower body 1. The bent ends 10 are used to ensure the stable installation of the arc-shaped guide bar 9, and at the same time ensure that the scraper bar 8 does not affect the sliding of the surface of the arc-shaped guide bar 9.

[0041] The upper end of the scraper strip 8 is fixedly connected to a connecting seat 26, and the connecting seat 26 and the upper surface of the scraper strip 8 move together and are penetrated by a rotating shaft 13. The lower end of the rotating shaft 13 is fixedly connected to an anti-slip block 14, and the anti-slip block 14 cooperates with the internal rotation of the scraper strip 8. The upper end of the rotating shaft 13 is fixedly connected to the lower edge of the wind plate 11, and the wind plate 11 rotates around the rotating shaft 13 as the axis.

[0042] like Fig. 9 As shown, the upper surface of the connection seat 26 is fixedly provided with fixing blocks 27 at both sides near the wind plate 11, and the side of the fixing block 27 near the wind plate 11 is movably provided with a stopper 28 through an elastic mechanism. The elastic mechanism includes at least two jacks 29 opened on the side of the fixing block 27, and a buffer spring 32 is arranged inside the jack 29. A T-shaped rod 31 is slidably inserted into the port of the jack 29, and one end of a plurality of T-shaped rods 31 is fixedly connected to the side of the stopper 28. When the stopper 28 is hit by the wind plate 11, the T-shaped rod 31 will squeeze the buffer spring 32 to achieve a buffering effect, and at the same time, it will give the wind plate 11 a certain reaction force to promote rotation, so that when it is blown by the exhaust gas, it will move toward the other side.

[0043] like Figure 1 As shown, an inspection ladder 5 is fixedly installed on the outer surface of the tower body 1, and a liquid regulating pipe 3 is fixedly installed on the upper surface of the water tank 2 near the inspection door 6. The liquid regulating pipe 3 is used to add spray liquid or to extract spray liquid during maintenance.

[0044] A method for treating waste gas, using the above-mentioned device, comprises the following steps:

[0045] S1, the exhaust pipe port is connected to the port of the air inlet pipe 7, the spray liquid is added to the water tank 2 and the distance between the liquid surface and the top surface of the water tank 2 needs to be greater than one meter to prevent the shell from adhering to the top surface of the water tank 2 when the liquid surface is crusted in the later stage;

[0046] S2, after the exhaust gas is introduced into the inner side of the tower body 1, the spray mechanism works to spray, and the treated exhaust gas is discharged through the exhaust pipe 4;

[0047] S3. The staff regularly opens the inspection door 6 to salvage and clean the crust on the liquid surface.

[0048] During use, the exhaust gas enters the inner side of the tower body 1 from the air inlet pipe 7, the water pump 17 works, the spray liquid in the water tank 2 is sucked, passes through the water pipe 16 and the injection pipe 18 to reach the main pipe 19, and then enters the branch pipe 20, and is sprayed out through a plurality of nozzles 21 for atomization, so as to achieve the effect of exhaust gas spraying. The paper scraps and dust in the exhaust gas are wetted by water and fall into the liquid below. At the same time, the spray liquid will reach the inner side of the arc channel 22. Under the action of the curved surface 23, based on the Bernoulli principle and the continuity principle of the fluid, the liquid sprayed through the narrow mouth 24 will form a narrow water curtain, and spray onto the inner wall of the tower body 1, and then follow the downstream. When the water curtain passes through one end of the inner side of the air inlet pipe 7, it will contact with the incoming exhaust gas, so as to achieve the effect of preliminary spraying of the exhaust gas. Therefore, compared with the traditional spray tower, it has the function of preliminary spraying and improves the exhaust gas treatment effect.

[0049] When the exhaust gas enters, the wind plate 11 will be blown, causing the wind plate 11 to swing. The unstable wind plate 11 will cause the scraper 8 to move along the inner side of the tower body 1. The arc-shaped guide bar 9 limits the maximum movement distance of the scraper 8. Since the lower end of the wind plate 11 can rotate around the rotating shaft 13, when the wind plate 11 touches the block 28 during rotation, it will be subjected to the reaction force of the block 28. This part of the design further increases the instability of the wind plate 11 during blowing, so that the scraper 8 moves unstably with the wind plate 11, thereby achieving the effect of cleaning the inner wall of the tower body 1 and the edge of the liquid surface, preventing the problem of crusting at this position, and facilitating later cleaning and maintenance.

[0050] The water curtain that does not pass through the port of the air inlet pipe 7 will fall directly to the edge of the liquid surface. Since the tower body 1 is relatively high, more gravitational potential energy in the downstream of the water curtain is converted into kinetic energy, so that the water curtain impacts the liquid surface when it falls to the edge of the liquid surface, preventing the problem of crusting at this position. At the same time, the impacting water flow also helps the floating crust to move toward the direction of the water tank 2. At the same time, due to the existence of the guide plate 12, the airflow when part of the exhaust gas enters flows obliquely downward, blowing the liquid surface and helping to blow the floating crust toward the direction of the water tank 2. Therefore, the staff only needs to regularly salvage and clean the crust at the inspection door 6, which is convenient for maintenance.

[0051] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A waste gas treatment spray tower for waste paper raw material production, comprising a tower body (1), a discharge pipe (4) being fixedly arranged at the upper end of the tower body (1), characterized in that: A water tank (2) is fixedly connected to a side surface of the tower body (1) near the lower end, and an inspection door (6) is movably installed on the upper surface of the water tank (2). The surface of the tower body (1) at a height position corresponding to the water tank (2) is a semi-cylindrical shell. An air inlet pipe (7) is fixedly installed on a side surface of the tower body (1) away from the water tank (2), and the height of the air inlet pipe (7) is located above the water tank (2). A scraper (8) is slidably installed on the inner wall of the tower body (1) near the lower part of the air inlet pipe (7). The upper end of the scraper (8) is rotatably connected to a wind plate (11). The outer surfaces of both sides of the wind plate (11) are provided with a plurality of guide plates (12). A plurality of spray mechanisms are provided on the inner side of the tower body (1) near the upper end. The outer port of the spray mechanism is connected to an arc channel (22). A narrow opening (24) is opened on the edge of the arc channel (22), and the opening direction of the narrow opening (24) is toward the side away from the water tank (2). After the spray liquid enters the arc-shaped channel (22), it is discharged through the narrow opening (24) to form a water curtain along the inner wall of the tower body (1).

2. The waste gas treatment spray tower for waste paper raw material production according to claim 1 is characterized by: The spray mechanism comprises an injection pipe (18) fixedly embedded in the outer surface of the tower body (1), the lower end of the injection pipe (18) is fixedly connected to a main pipe (19), the two side surfaces of the main pipe (19) are respectively fixedly connected to a plurality of branch pipes (20), the outer surfaces of the branch pipes (20) are fixedly provided with a plurality of spray heads (21), the ports of the plurality of branch pipes (20) close to one side are fixedly connected to the surface of the arc channel (22), and a mounting frame (33) is fixedly installed on the upper surface of the main pipe (19), and the two ends of the mounting frame (33) are respectively fixedly connected to the inner wall of the tower body (1).

3. The waste gas treatment spray tower for waste paper raw material production according to claim 2 is characterized by: The front ends of the plurality of injection pipes (18) are commonly fixedly connected to a water pipe (16); the lower end of the water pipe (16) is connected to the water outlet of a water pump (17); the water inlet of the water pump (17) is connected to the inner side of the water tank (2) through a pipe body; and the water pump (17) is fixedly mounted on one side of the water tank (2).

4. The waste gas treatment spray tower for waste paper raw material production according to claim 1 is characterized in that: The upper and lower surfaces of the arc-shaped channel (22) are respectively provided with curved surfaces (23), and a plurality of stabilizing blocks (25) are fixedly provided in the port of the narrow opening (24).

5. The waste gas treatment spray tower for waste paper raw material production according to claim 1 is characterized by: The outer surface of the scraper bar (8) is provided with a plurality of guide openings (15), an arc-shaped guide bar (9) is slidably inserted into the inner side of each guide opening (15), and the two ends of the arc-shaped guide bar (9) are respectively fixedly connected to bent ends (10), and the ends of the bent ends (10) are fixedly connected to the inner wall of the tower body (1).

6. The waste gas treatment spray tower for waste paper raw material production according to claim 1 is characterized by: The upper end of the scraper strip (8) is fixedly connected to a connecting seat (26), the connecting seat (26) and the upper surface of the scraper strip (8) are movable together and a rotating shaft (13) is passed through, the lower end of the rotating shaft (13) is fixedly connected to an anti-slip block (14), the anti-slip block (14) is internally rotatably matched with the scraper strip (8), and the upper end of the rotating shaft (13) is fixedly connected to the lower edge of the wind plate (11).

7. The waste gas treatment spray tower for waste paper raw material production according to claim 6, characterized in that: Fixed blocks (27) are respectively fixedly provided on both sides of the upper surface of the connection seat (26) close to the wind plate (11), and a stopper (28) is movably mounted on one side of the fixed block (27) close to the wind plate (11) via an elastic mechanism.

8. The waste gas treatment spray tower for waste paper raw material production according to claim 7, characterized in that: The elastic mechanism comprises at least two insertion holes (29) provided on the side of the fixing block (27), a buffer spring (32) being arranged inside the insertion hole (29), a T-shaped rod (31) being slidably inserted into the end of the insertion hole (29), and one end of a plurality of T-shaped rods (31) being fixedly connected to the side of the stopper (28).

9. The waste gas treatment spray tower for waste paper raw material production according to claim 1, characterized in that: An inspection ladder (5) is fixedly mounted on the outer surface of the tower body (1), and a liquid regulating pipe (3) is fixedly mounted on a side of the upper surface of the water tank (2) close to the inspection door (6).

10. A method for treating waste gas, using the waste gas treatment spray tower for waste paper raw material production according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, the exhaust pipe port is connected to the port of the air inlet pipe (7), spray liquid is added to the water tank (2) and the distance between the liquid surface and the top surface of the water tank (2) needs to be greater than one meter; S2, after the exhaust gas is introduced into the inner side of the tower body (1), the spray mechanism operates to spray, and the treated exhaust gas is discharged through the exhaust pipe (4); S3. The staff regularly opens the inspection door (6) to salvage and clean the crust on the liquid surface.

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