Carbendazim production tail gas absorption treatment system

Abstract

The invention discloses a carbendazim production tail gas absorption treatment system, which comprises an absorption tower and an absorption liquid lifting device, the top end of the absorption tower is provided with a tail gas discharge port, the bottom end of the absorption tower is provided with a liquid discharge port, one side of the absorption tower close to the bottom end is provided with a gas inlet pipe, and one side of the liquid discharge port is provided with a circulation branch; the liquid outlet is connected with the liquid inlet end of the absorption liquid lifting device, the liquid outlet end of the absorption liquid lifting device is connected with a spraying pipe, one end of the spraying pipe extends to the position, close to the top end, in the absorption tower, and a sprayer is fixed to the end of the spraying pipe. An upper screen plate and a lower screen plate are respectively fixed below the sprayers in the absorption tower, and a filler is arranged between the upper screen plate and the lower screen plate. Through the design that tail gas makes contact with the absorption liquid from bottom to top and then makes secondary contact with the absorption liquid through spraying, the gas-liquid contact area is increased by combining the filler between the upper net plate and the lower net plate, the tail gas absorption efficiency is remarkably improved, carbendazim production tail gas can be effectively purified, pollution of harmful gas emission to the environment is reduced, and the environment protection requirement is met.

Description

Technical Field

[0001] The invention relates to the technical field of carbendazim production, and in particular to a carbendazim production tail gas absorption and treatment system. Background Art

[0002] During the production process of carbendazim, a large amount of tail gas containing various harmful components will be generated, such as benzene series, ammonia, etc. If these tail gases are directly discharged into the atmosphere without effective treatment, they will cause serious pollution to the surrounding environment and endanger the ecological balance and human health, such as causing a decline in air quality, forming acid rain, harming the growth of animals and plants, and causing respiratory diseases.

[0003] There are many deficiencies in the traditional methods and devices for treating tail gas from the production of carbendazim. Some simple absorption devices only use a single absorption liquid spraying or static absorption method, resulting in insufficient gas-liquid contact and low absorption efficiency, making it difficult to meet increasingly stringent environmental emission standards. Some devices lack effective recycling of the absorption liquid and power optimization design, resulting in large absorption liquid consumption and high energy consumption, which increases the treatment cost. Moreover, the traditional devices are not sophisticated enough in gas-liquid mixing and stirring, and cannot form a good turbulence effect, making it difficult for harmful components in the tail gas to fully react with the absorption liquid, affecting the treatment effect and stability.

[0004] In summary, in order to overcome the defects of the existing technology and meet the urgent needs of carbendazim production enterprises for efficient, economical and environmentally friendly treatment of tail gas, it is of great practical significance to develop a new type of carbendazim production tail gas absorption treatment system. Summary of the invention

[0005] In order to solve the problems mentioned in the above background technology, the present invention provides a carbendazim production tail gas absorption treatment system.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A carbendazim production tail gas absorption treatment system comprises an absorption tower and an absorption liquid lifting device, wherein the top of the absorption tower is provided with a tail gas discharge port, the bottom of the absorption tower is provided with a liquid discharge port, an air inlet pipe is installed near the bottom of one side of the absorption tower, and a circulation branch is provided on one side of the liquid discharge port;

[0008] The liquid discharge port is connected to the liquid inlet end of the absorption liquid lifting device, and the liquid outlet end of the absorption liquid lifting device is connected to a spray pipe. One end of the spray pipe extends to the inside of the absorption tower near the top position and is fixed with a sprayer.

[0009] Preferably, an upper mesh plate and a lower mesh plate are fixed to the interior of the absorption tower below the sprayer, a filler is provided between the upper mesh plate and the lower mesh plate, and a first manhole and a second manhole are installed on the side walls of the absorption tower.

[0010] Preferably, a liquid collector is fixed inside the absorption tower below the lower mesh plate, an annular baffle is rotatably mounted on the bottom end of the liquid collector, a plurality of through holes are opened on the annular baffle, and vertical pipes are fixed at the bottom end of the annular baffle and at positions corresponding to the through holes.

[0011] Preferably, a liquid distribution pipe is fixed on one side of the bottom end of the vertical pipe, and the liquid distribution pipe is fixedly connected to a plurality of horizontally arranged liquid distribution pipes, and a plurality of liquid discharge nozzles are provided on the liquid distribution pipe.

[0012] Preferably, a first conveying screw is rotatably installed inside the vertical pipe, the top end of the first conveying screw extends above the annular baffle and is fixed with a spur gear, a first gear ring is fixed on the inner wall of the absorption tower, and the spur gear is meshed with the first gear ring.

[0013] Preferably, one end of the air inlet pipe extends to the interior of the absorption tower and is fixed with an annular distribution container, a top cover is rotatably installed on the top of the annular distribution container, a plurality of gas distribution pipes are installed on the top cover, a plurality of gas distribution pipes are fixedly connected to the gas distribution pipes, and a plurality of gas exhaust holes are opened on the gas distribution pipe.

[0014] Preferably, a second gear ring is fixed between the outer sides of the plurality of gas distribution pipes, a second gear ring is fixed between the outer sides of the plurality of vertical pipes, a rotating motor is fixed on the outer wall of the absorption tower, the output shaft of the rotating motor extends to the interior of the absorption tower and is fixed with a first bevel gear, the first bevel gear is located between the second gear ring and the second gear ring, and the second gear ring and the second gear ring are both meshed with the first bevel gear.

[0015] Preferably, the absorption liquid lifting device includes a vertical lifting pipe, a second conveying screw is rotatably installed inside the vertical lifting pipe, a second bevel gear is installed outside the second conveying screw, a power input shaft is rotatably installed on the vertical lifting pipe, a third bevel gear is fixed at one end of the power input shaft, and the third bevel gear is meshed with the second bevel gear.

[0016] Preferably, the other end of the power input shaft extends to the interior of the absorption tower and is fixed with a third bevel gear, the third bevel gear is located between the second gear ring and the second gear ring, and the second gear ring and the second gear ring are both meshed with the third bevel gear.

[0017] Preferably, a gas guide tube is fixed inside the liquid collector, a baffle is installed at the top end of the gas guide tube, and the top end of the baffle is smoothly raised upward.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. Efficient absorption and purification: The system adopts a design in which the tail gas contacts the absorption liquid from bottom to top in the tower kettle first and then contacts it again through spraying. Combined with the filler between the upper and lower mesh plates to increase the gas-liquid contact area, the tail gas absorption efficiency is significantly improved. It can effectively purify the tail gas produced by carbendazim, reduce the pollution of harmful gas emissions to the environment, and meet environmental protection requirements.

[0020] 2. Strengthen gas-liquid mixing and turbulence: After the liquid collector collects the absorption liquid, the vertical pipe is used to rotate to drive the first conveying screw to rotate, so that the absorption liquid is sprayed out from the discharge nozzle and impacts the absorption liquid in the tower bottom. At the same time, the rotation of the vertical pipe drives the liquid distribution pipe to stir, and the rotation and stirring of the annular distribution container at the air inlet pipe end, the air distribution pipe and the gas distribution pipe are coordinated, and the gas-liquid stirring directions are opposite, which greatly enhances the gas-liquid mixing effect and the degree of turbulence, and further improves the absorption efficiency.

[0021] 3. Power synergy and energy saving: The absorption liquid lifting device cleverly uses the transmission of the second gear ring and the third bevel gear to convert the power generated by the rotation of the vertical pipe and the air distribution pipe into the rotational power of the second conveying screw, thereby realizing the upward transportation of the absorption liquid without the need for additional power equipment, reducing equipment costs and energy consumption, and improving the economy and energy utilization efficiency of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a three-dimensional diagram of the absorption tower of the present invention;

[0024] Figure 2 This is a front view of the absorption tower of the present invention;

[0025] Figure 3 It is a three-dimensional cross-sectional view of the absorption tower of the present invention;

[0026] Figure 4 It is a cross-sectional view of the absorption tower of the present invention from the main perspective;

[0027] Figure 5 is a cross-sectional view of a vertical riser of the present invention;

[0028] Figure 6 for Figure 5 A zoomed-in detail of position A in the middle;

[0029] Figure 7 It is an enlarged detail view of the vertical pipe position of the present invention;

[0030] Figure 8It is a front view of the relative position relationship between the liquid distribution pipe and the gas distribution pipe of the present invention;

[0031] Fig. 9 A three-dimensional diagram showing the relative position relationship between the liquid distribution tube and the gas distribution tube of the present invention;

[0032] In the figure: 1, absorption tower; 101, tail gas discharge port; 102, liquid discharge port; 1021, circulation branch; 103, air inlet pipe; 1031, annular distribution container; 1032, top cover; 104, first manhole; 105, second manhole; 2, net plate; 201, lower net plate; 3, liquid collector; 301, annular baffle; 302, gas guide pipe; 303, baffle; 304, vertical pipe; 305, first conveying screw; 306, liquid distribution pipe; 307, Liquid distribution pipe; 308, liquid discharge nozzle; 309, first gear ring; 310, second gear ring; 4, gas distribution pipe; 401, gas distribution pipe; 402, gas discharge air; 403, second gear ring; 5, rotating motor; 501, first bevel gear; 6, vertical lifting pipe; 601, second conveying screw; 602, spray pipe; 603, sprayer; 604, power input shaft; 605, third bevel gear; 606, third bevel gear; 607, second bevel gear. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. 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.

[0034] Example 1

[0035] Reference Figure 1-9 A carbendazim production tail gas absorption treatment system comprises an absorption tower 1 and an absorption liquid lifting device, wherein a tail gas discharge port 101 is provided at the top of the absorption tower 1, a liquid discharge port 102 is provided at the bottom of the absorption tower 1, an air inlet pipe 103 is installed near the bottom of one side of the absorption tower 1, and a circulation branch 1021 is provided at one side of the liquid discharge port 102;

[0036] The tail gas to be absorbed and treated enters the absorption tower 1 through the air inlet pipe 103, and the gas flows from bottom to top. The discharge port 102 is connected to the liquid inlet end of the absorption liquid lifting device, and the liquid outlet end of the absorption liquid lifting device is connected to the spray pipe 602. One end of the spray pipe 602 extends to the inside of the absorption tower 1 near the top position, and a sprayer 603 is fixed thereon. The gas first contacts the absorption liquid in the bottom of the absorption tower 1 for preliminary absorption, and then continues to flow upward. After the bottom liquid is lifted upward by the absorption liquid lifting device, it is sprayed out through the spray pipe 602, thereby contacting the upward-flowing gas for a second time, further improving the absorption effect.

[0037] Example 2

[0038] Reference Figure 1-9 The difference between this embodiment and embodiment 1 is that an upper mesh plate 2 and a lower mesh plate 201 are fixed to the interior of the absorption tower 1 below the sprayer 603, a filler is provided between the upper mesh plate 2 and the lower mesh plate 201, and a first manhole 104 and a second manhole 105 are installed on the side walls of the absorption tower 1;

[0039] The filler can further increase the contact rate between the upward-flowing gas and the downward-flowing liquid, thereby improving the absorption effect.

[0040] Example 3

[0041] Reference Figure 1-9 The difference between this embodiment and embodiment 1 is that a liquid collector 3 is fixed below the lower mesh plate 201 inside the absorption tower 1, and an annular baffle 301 is rotatably installed at the bottom end of the liquid collector 3. The annular baffle 301 is provided with a plurality of through holes, and a vertical pipe 304 is fixed at the bottom end of the annular baffle 301 at positions corresponding to the through holes, a liquid distribution pipe 306 is fixed to one side of the bottom end of the vertical pipe 304, and the liquid distribution pipe 306 is fixedly connected to a plurality of horizontally arranged liquid distribution pipes 307, and the liquid distribution pipe 307 is provided with a plurality of liquid discharge nozzles 308, and a first conveying screw 305 is rotatably installed inside the vertical pipe 304, and the top end of the first conveying screw 305 extends to the top of the annular baffle 301 and is fixed with a spur gear 306, and a first gear ring 309 is fixed on the inner wall of the absorption tower 1, and the spur gear 306 is meshed with the first gear ring 309;

[0042] The liquid collector 3 is used to collect the absorption liquid flowing downward from the packing layer. When the multiple vertical pipes 304 are driven to rotate as a whole, the spur gear 306 and the first gear ring 309 can drive the first conveying screw 305 to rotate inside the vertical pipe 304, thereby giving a downward thrust to the liquid inside the vertical pipe 304, so that the absorption liquid in the liquid collector 3 can be sprayed out from the discharge nozzle 308 on the liquid distribution pipe 307. The discharge nozzle 308 is immersed below the absorption liquid level in the tower kettle, thereby pressurizing the refluxed absorption liquid and generating an impact force on the original absorption liquid in the tower kettle, which can promote the mixing effect between the gas and the absorption liquid in the tower kettle, improve the contact rate, and improve the absorption effect. When the multiple vertical pipes 304 rotate as a whole, they can also drive the liquid distribution pipe 307 to stir the absorption liquid, thereby further promoting absorption.

[0043] Example 4

[0044] Reference Figure 1-9 , the difference between this embodiment and embodiment 3 is that one end of the air inlet pipe 103 extends to the interior of the absorption tower 1 and is fixed with an annular distribution container 1031, a top cover 1032 is rotatably installed on the top of the annular distribution container 1031, a plurality of gas distribution pipes 4 are installed on the top cover 1032, a plurality of gas distribution pipes 4 are fixedly connected to the gas distribution pipes 4, a plurality of gas discharge holes 402 are opened on the gas distribution pipes 401, a second gear ring 403 is fixed between the outer sides of the plurality of gas distribution pipes 4, a second gear ring 310 is fixed between the outer sides of the plurality of vertical pipes 304, a rotating motor 5 is fixed on the outer wall of the absorption tower 1, an output shaft of the rotating motor 5 extends to the interior of the absorption tower 1 and is fixed with a first bevel gear 501, the first bevel gear 501 is located between the second gear ring 310 and the second gear ring 403, and the second gear ring 310 and the second gear ring 403 are both meshed with the first bevel gear 501;

[0045] When the rotating motor 5 is turned on, the engagement of the first bevel gear 501, the second gear ring 310 and the second gear ring 403 can drive the overall rotation of the multiple vertical pipes 304 and the overall rotation of the multiple gas distribution pipes 4, thereby driving the gas distribution pipe 401 to rotate to improve the gas distribution effect, and also stirring the absorption liquid in the bottom of the tower through the rotation of the gas distribution pipe 401 to promote absorption. The rotation direction of the gas distribution pipe 401 is exactly opposite to the rotation direction of the liquid distribution pipe 307, which can improve the turbulence effect and further improve the stirring effect.

[0046] Example 5

[0047] Reference Figure 1-9The difference between this embodiment and embodiment 4 is that the absorption liquid lifting device includes a vertical lifting pipe 6, a second conveying screw 601 is rotatably installed inside the vertical lifting pipe 6, a second bevel gear 607 is installed outside the second conveying screw 601, a power input shaft 604 is rotatably installed on the vertical lifting pipe 6, a third bevel gear 606 is fixed to one end of the power input shaft 604, the third bevel gear 606 is meshed with the second bevel gear 607, and the other end of the power input shaft 604 extends to the inside of the absorption tower 1 and is fixed with a third bevel gear 605 The third bevel gear 605 is located between the second gear ring 310 and the second gear ring 403, and the second gear ring 310 and the second gear ring 403 are both meshed with the third bevel gear 605. The reverse rotation of the second gear ring 310 and the second gear ring 403 can drive the third bevel gear 605 to rotate, thereby driving the power input shaft 604 to rotate, and then the third bevel gear 606 is meshed with the second bevel gear 607 to drive the second conveying screw 601 to rotate, thereby driving the liquid in the vertical lifting pipe 6 to flow upward, without the need for additional power equipment.

[0048] Among them, a gas guide tube 302 is fixed inside the liquid collector 3, and a baffle 303 is installed at the top of the gas guide tube 302. The top of the baffle 303 smoothly protrudes upward. The baffle 303 can block the absorption liquid flowing down from above, thereby preventing the absorption liquid from directly flowing from the gas guide tube 302 into the tower bottom. The bottom end of the gas guide tube 302 is located above the liquid level of the absorption liquid in the tower bottom, and is used to guide the gas to flow upward through the liquid collector 3.

[0049] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0050] In the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0052] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A system for absorbing and treating tail gas from the production of carbendazim, comprising an absorption tower (1) and an absorption liquid lifting device, characterized in that: The top of the absorption tower (1) is provided with an exhaust gas discharge port (101), the bottom of the absorption tower (1) is provided with a liquid discharge port (102), an air inlet pipe (103) is installed on one side of the absorption tower (1) near the bottom, and a circulation branch (1021) is provided on one side of the liquid discharge port (102); The liquid discharge port (102) is connected to the liquid inlet end of the absorption liquid lifting device, and the liquid outlet end of the absorption liquid lifting device is connected to a spray pipe (602). One end of the spray pipe (602) extends to the inside of the absorption tower (1) near the top position and is fixed with a sprayer (603).

2. A carbendazim production tail gas absorption treatment system according to claim 1, characterized in that: An upper mesh plate (2) and a lower mesh plate (201) are fixed to the interior of the absorption tower (1) below the sprayer (603), a filler is provided between the upper mesh plate (2) and the lower mesh plate (201), and a first manhole (104) and a second manhole (105) are installed on the side walls of the absorption tower (1).

3. The tail gas absorption treatment system for carbendazim production according to claim 1, characterized in that: A liquid collector (3) is fixed inside the absorption tower (1) below the lower mesh plate (201), an annular baffle (301) is rotatably mounted on the bottom end of the liquid collector (3), a plurality of through holes are formed on the annular baffle (301), and a vertical pipe (304) is fixed at the bottom end of the annular baffle (301) at positions corresponding to the through holes.

4. A carbendazim production tail gas absorption treatment system according to claim 3, characterized in that: A liquid distribution pipe (306) is fixed to one side of the bottom end of the vertical pipe (304), and the liquid distribution pipe (306) is fixedly connected to a plurality of horizontally arranged liquid distribution pipes (307), and the liquid distribution pipes (307) are provided with a plurality of liquid discharge nozzles (308).

5. A carbendazim production tail gas absorption treatment system according to claim 4, characterized in that: A first conveying screw (305) is rotatably mounted inside the vertical pipe (304), the top end of the first conveying screw (305) extends to above the annular baffle (301) and is fixed with a spur gear (306), a first gear ring (309) is fixed on the inner wall of the absorption tower (1), and the spur gear (306) is meshed with the first gear ring (309).

6. A carbendazim production tail gas absorption treatment system according to claim 5, characterized in that: One end of the air inlet pipe (103) extends to the interior of the absorption tower (1) and is fixed with an annular distribution container (1031); a top cover (1032) is rotatably mounted on the top of the annular distribution container (1031); a plurality of gas distribution pipes (4) are mounted on the top cover (1032); a plurality of gas distribution pipes (401) are fixedly connected to the gas distribution pipes (4); and a plurality of gas exhaust holes (402) are provided on the gas distribution pipes (401).

7. A carbendazim production tail gas absorption treatment system according to claim 6, characterized in that: A second gear ring (403) is fixed between the outer sides of the plurality of gas distribution pipes (4), a second gear ring (310) is fixed between the outer sides of the plurality of vertical pipes (304), a rotating motor (5) is fixed on the outer wall of the absorption tower (1), an output shaft of the rotating motor (5) extends into the interior of the absorption tower (1) and is fixed with a first bevel gear (501), the first bevel gear (501) is located between the second gear ring (310) and the second gear ring (403), and both the second gear ring (310) and the second gear ring (403) are meshed with the first bevel gear (501).

8. The tail gas absorption treatment system for carbendazim production according to claim 7, characterized in that: The absorption liquid lifting device comprises a vertical lifting pipe (6), a second conveying screw (601) is rotatably mounted inside the vertical lifting pipe (6), a second bevel gear (607) is mounted outside the second conveying screw (601), a power input shaft (604) is rotatably mounted on the vertical lifting pipe (6), a third bevel gear (606) is fixed to one end of the power input shaft (604), and the third bevel gear (606) is meshed with the second bevel gear (607).

9. A carbendazim production tail gas absorption treatment system according to claim 8, characterized in that: The other end of the power input shaft (604) extends to the interior of the absorption tower (1) and is fixed with a third bevel gear (605), the third bevel gear (605) is located between the second gear ring (310) and the second gear ring (403), and the second gear ring (310) and the second gear ring (403) are both meshed with the third bevel gear (605).

10. The tail gas absorption treatment system for carbendazim production according to claim 3, characterized in that: A gas guide tube (302) is fixed inside the liquid collector (3), a baffle (303) is installed at the top end of the gas guide tube (302), and the top end of the baffle (303) smoothly protrudes upwards.

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