Flash drying tail gas absorption device

Abstract

The utility model discloses a flash drying tail gas absorption device which comprises a tail gas absorption tower, a tail gas inlet is formed in one side of the top of the tail gas absorption tower, a gas outlet is formed in the top end of the tail gas absorption tower, the tail gas inlet is fixedly connected with a right-angle bent pipe in the tail gas absorption tower, and a flow stabilizing cover is installed and connected to the bottom of the right-angle bent pipe. A spraying pipe is mounted in the tail gas absorption tower above the right-angle bent pipe, and a spraying opening of the spraying pipe is positioned right above the right-angle bent pipe; a reaction tank is arranged below the steady flow hood, and a cooling jacket is arranged outside the tower body of the tail gas absorption tower corresponding to the area where the reaction tank is located. According to the device, dust particles and harmful gas contained in tail gas can be absorbed and treated at the same time, and raw material intermediates in treated waste liquid can be recycled, so that the raw material intermediates can enter a production process again, and the reutilization of resources is realized, so that the consumption of raw materials is reduced, and the equipment and production costs are effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas treatment devices, and particularly relates to a flash drying tail gas absorption device. Background Art

[0002] A flash dryer is a continuous drying device integrating drying, crushing and screening, and is suitable for drying filter cake-like, paste-like and thin slurry-like materials. However, the tail gas generated during the flash drying process contains a large amount of dust particles and various harmful gases. In order to prevent the dust concentration from being too high and the harmful gases from polluting the surrounding environment, the prior art usually passes the tail gas into a tail gas treatment device for treatment. For example, in a patent of a flash drying tail gas and dust absorption device with the publication number CN 208711331 U, a dust absorption device for the tail gas of a flash drying device is designed. This device can capture the dust particles in the tail gas by a water film, achieving the effect of removing the dust in the tail gas. However, such devices can only remove the dust in the tail gas and cannot effectively remove the harmful gases contained in the tail gas. Direct emission will still pollute the environment, and additional equipment needs to be added to continue treating the tail gas, resulting in a relatively high treatment cost. Content of the Utility Model

[0003] The purpose of the utility model is to provide a flash drying tail gas absorption device aiming at the deficiencies of the prior art, which can simultaneously complete the absorption and treatment of the dust particles and harmful gases contained in the tail gas, recycle the raw material intermediates in the treated waste liquid, so that they can re-enter the production process, realize the reuse of resources, thereby reducing the consumption of raw materials and effectively reducing the equipment and production costs.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A flash drying tail gas absorption device, comprising a tail gas absorption tower. One side of the top part of the tower body of the tail gas absorption tower is provided with a tail gas inlet, and the top end of the tail gas absorption tower is provided with an air outlet. Inside the tail gas absorption tower at the tail gas inlet, a right-angle elbow is fixedly connected. One end of the right-angle elbow is fixedly connected to the tail gas inlet, and a flow stabilizer is installed and connected at the other end of the right-angle elbow. Inside the tail gas absorption tower above the right-angle elbow, a spray pipe is installed. One end of the spray pipe is provided with a spray opening, and the spray opening is located directly above the right-angle elbow. The other end of the spray pipe is fixedly connected to a liquid inlet on the tower body of the tail gas absorption tower, and the liquid inlet is located on the opposite side of the tail gas inlet. Inside the tail gas absorption tower, a reaction pool is provided below the flow stabilizer. On the side of the tower body of the tail gas absorption tower corresponding to the area where the reaction pool is located, a circulation port is provided, and on the side of the tower body of the tail gas absorption tower corresponding to the bottom of the reaction pool, a sewage discharge port is provided. The circulation port is located on the opposite side of the tail gas inlet, and the sewage discharge port is in the direction of rotating 90° clockwise along the direction of the tail gas inlet pipe opening. Both the circulation port and the sewage discharge port are communicated with the inside of the reaction pool.

[0006] Specifically, at the bottom of the tower body of the tail gas absorption tower corresponding to the area where the reaction pool is located, a cooling jacket is provided. The top and bottom of the cooling jacket are respectively provided with a cooling outlet and a cooling inlet. The direction of the cooling outlet pipe opening is the same as that of the sewage discharge port pipe opening, and the direction of the cooling inlet pipe opening is the direction of rotating 45° counterclockwise along the direction of the tail gas inlet pipe opening.

[0007] Specifically, on the tower body of the tail gas absorption tower corresponding to the height where the tail gas inlet is located, an alkali liquor port and a water replenishing port are provided. The direction of the alkali liquor port pipe opening is the direction of rotating 110° clockwise along the direction of the tail gas inlet pipe opening, and the direction of the water replenishing port pipe opening is the same as that of the cooling inlet pipe opening.

[0008] Specifically, on the tower body of the tail gas absorption tower corresponding to the position of the flow stabilizer, a sight glass is provided; on the front of the tower body of the tail gas absorption tower corresponding to the bottom of the reaction pool, a manhole is provided; the opening directions of the sight glass and the manhole are the direction of rotating 45° clockwise along the direction of the tail gas inlet pipe opening.

[0009] Specifically, a plurality of flow stabilizing holes are uniformly arranged on the bottom surface and side surface of the flow stabilizer. The diameter of the flow stabilizing holes is 25 mm, and the center distance between two adjacent flow stabilizing holes is 50 mm.

[0010] Specifically, a liquid level gauge is provided in the middle section of the tower body of the tail gas absorption tower. Corresponding to the top and bottom of the liquid level gauge, liquid level gauge ports are provided. The direction of the liquid level gauge port pipe opening is the direction of rotating 135° clockwise along the direction of the tail gas inlet pipe opening.

[0011] Preferably, the tower body of the tail gas absorption tower is made of 6 mm stainless steel plate.

[0012] Preferably, the flow stabilizer is made of 3 mm thick S304 stainless steel plate.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. By arranging a spraying device and a reaction tank in the tail gas absorption tower, the device of the utility model can simultaneously complete the absorption treatment of dust particles and harmful gases contained in the tail gas, and recycle the dye intermediate in the treated waste liquid, so that it can re-enter the production process, realize the reuse of resources, thereby reducing the consumption of raw materials and effectively reducing the equipment and production costs.

[0015] 2. A flow stabilizer is arranged in the tail gas absorption tower of the device of the utility model, which can make the tail gas enter the tail gas absorption tower smoothly and uniformly, so that the dust particles and harmful gases in the tail gas can be fully absorbed and treated, effectively avoiding the risk that some dust particles and harmful gases are discharged without being absorbed and treated in time due to the too fast speed of the tail gas entering the tail gas absorption tower.

[0016] 3. The device of the utility model recovers the dye intermediate in the tail gas through the absorption device and returns it to the production process, which can optimize the production process and improve the utilization rate of raw materials. It not only improves the efficiency of the production process, but also reduces the possible production interruption time because there is no need to frequently replace or supplement raw materials. In addition, through effective tail gas recovery and treatment, the enterprise production can meet the environmental protection requirements and reduce the downtime caused by environmental protection problems, thereby improving the overall production efficiency.

[0017] 4. The device of the utility model recovers the dye intermediate in the tail gas through the absorption device, which embodies the principle of green chemistry, that is, minimizing environmental pollution and excessive consumption of natural resources in the chemical production process. This is not only beneficial to the sustainable development of the enterprise, but also helps to promote the development of the entire chemical industry towards the green and environmental protection direction. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of a flash drying tail gas absorption device of the utility model.

[0019] Figure 2 It is a schematic diagram of the pipe orifice direction layout of a flash drying tail gas absorption device of the utility model.

[0020] Figure 3 It is a schematic diagram of the distribution of the flow stabilizing holes on the side of the flow stabilizer of the utility model;

[0021] Figure 4 It is a schematic diagram of the distribution of the flow stabilizing holes on the bottom surface of the flow stabilizer of the utility model.

[0022] Figure 5 It is a schematic diagram of the distance between the flow stabilizing holes of the utility model.

[0023] In the figure: 1. Tail gas absorption tower; 2. Tail gas inlet; 3. Outlet; 4. Right-angle elbow; 5. Flow stabilizer; 6. Spray pipe; 7. Spray orifice; 8. Liquid inlet; 9. Reaction tank; 10. Circulation port; 11. Drain port; 12. Cooling jacket; 13. Cooling outlet; 14. Cooling inlet; 15. Caustic soda port; 16. Water replenishment port; 17. Sight glass; 18. Manhole; 19. Flow stabilizing hole; 20. Liquid level gauge port. Detailed implementation mode

[0024] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present utility model are given in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present utility model more thorough and comprehensive.

[0025] Embodiment

[0026] As Figure 1 and Figure 2 shown, the present utility model provides a flash drying tail gas absorption device, including a tail gas absorption tower 1. One side of the top tower body of the tail gas absorption tower 1 is provided with a tail gas inlet 2, and the top of the tail gas absorption tower 1 is provided with an outlet 3. A right-angle elbow 4 is fixedly connected inside the tail gas absorption tower 1 at the tail gas inlet 2. One end of the right-angle elbow 4 is fixedly connected to the tail gas inlet 2, and a flow stabilizer 5 is installed and connected at the other end of the right-angle elbow 4. A spray pipe 6 is installed inside the tail gas absorption tower 1 above the right-angle elbow 4. One end of the spray pipe 6 is provided with a spray orifice 7, and the spray orifice 7 is located directly above the right-angle elbow 4. The other end of the spray pipe 6 is fixedly connected to a liquid inlet 8 on the tower body of the tail gas absorption tower 1, and the liquid inlet 8 is located on the opposite side of the tail gas inlet 2. A reaction tank 9 is provided inside the tail gas absorption tower 1 below the flow stabilizer 5. A circulation port 10 is provided on the side of the tower body of the tail gas absorption tower 1 corresponding to the area where the reaction tank 9 is located, and a drain port 11 is provided on the side of the tower body of the tail gas absorption tower 1 corresponding to the bottom of the reaction tank 9. The circulation port 10 is located on the opposite side of the tail gas inlet 2, and the drain port 11 is in the direction of rotating 90° clockwise along the direction of the tail gas inlet 2. Both the circulation port 10 and the drain port 11 are communicated with the inside of the reaction tank 9.

[0027] In this embodiment, a cooling jacket 12 is provided at the bottom of the tower body of the tail gas absorption tower 1 corresponding to the area where the reaction tank 9 is located. A cooling outlet 13 and a cooling inlet 14 are respectively provided at the top and bottom of the cooling jacket 12. The direction of the cooling outlet 13 is the same as that of the drain port 11, and the direction of the cooling inlet 14 is the direction of rotating 45° counterclockwise along the direction of the tail gas inlet 2.

[0028] In this embodiment, a liquid caustic soda port 15 and a water replenishing port 16 are provided at the height of the tower body of the tail gas absorption tower 1 corresponding to the height of the tail gas inlet 2. The pipe orifice direction of the liquid caustic soda port 15 is in the direction of rotating 110° clockwise along the pipe orifice direction of the tail gas inlet 2, and the pipe orifice direction of the water replenishing port 16 is the same as the pipe orifice direction of the cooling inlet 14.

[0029] In this embodiment, a sight glass 17 is provided at the position of the tower body of the tail gas absorption tower 1 corresponding to the steady flow hood 5; a manhole 18 is provided at the bottom of the reaction tank 9 corresponding to the front of the tower body of the tail gas absorption tower 1; the opening directions of the sight glass 17 and the manhole 18 are in the direction of rotating 45° clockwise along the pipe orifice direction of the tail gas inlet 2.

[0030] As Figure 3 and Figure 4 shown, a plurality of steady flow holes 19 are uniformly arranged on the bottom surface and the side surface of the steady flow hood 5. The diameter of the steady flow holes 19 is 25 mm. As Figure 5 shown, the center distance between two adjacent steady flow holes 19 is 50 mm.

[0031] In this embodiment, a liquid level gauge is provided in the middle section of the tower body of the tail gas absorption tower 1. Liquid level gauge ports 20 are provided corresponding to the top and the bottom of the liquid level gauge. The pipe orifice direction of the liquid level gauge ports 20 is in the direction of rotating 135° clockwise along the pipe orifice direction of the tail gas inlet 2.

[0032] In this embodiment, the tower body of the tail gas absorption tower 1 is made of 6 mm stainless steel plate.

[0033] In this embodiment, the steady flow hood 5 is made of 3 mm thick S304 stainless steel plate.

[0034] Working principle

[0035] See Figures 1 - 5During the flash drying process, the tail gas generated enters the tail gas inlet 2 through a pipeline, and smoothly enters the tail gas absorption tower 1 through the flow stabilizer 5 at the bottom of the right-angle elbow 4. The absorbent is sprayed from the spray nozzle 7 above the right-angle elbow 4. After adsorbing the dust particles and harmful gas components contained in the tail gas, it falls into the reaction pool 9 at the bottom of the tail gas absorption tower 1. After the reaction is complete in the reaction pool 9, the raw material intermediate in the waste liquid of the reaction pool 9 is recovered through the circulation port 10 and transported back to the production line through a pipeline to continue participating in the production. The harmless gas after treatment is discharged through the air outlet 3 at the top of the tail gas absorption tower 1; a cooling jacket 12 is provided at the bottom of the tail gas absorption tower 1, and cooling outlets 13 and cooling inlets 14 are provided at the top and bottom of the cooling jacket 12, which can timely take away the heat generated during the reaction in the reaction pool 9 through circulating cooling; the sight glass 17 and the liquid level gauge arranged on the tail gas absorption tower 1 can facilitate the staff to understand the tail gas intake and liquid level conditions in the tail gas absorption tower 1 in real time, so as to timely supplement water or liquid caustic soda into the tail gas absorption tower 1 through the water replenishment port 16 and the liquid caustic soda port 15; at the same time, the tail gas absorption tower 1 is provided with a manhole 18 and a sewage outlet 11, which can facilitate the staff to inspect and clean the tail gas absorption tower 1 during shutdown.

[0036] It should be understood that the above description of the preferred embodiment is relatively detailed, and it should not be considered as a limitation to the protection scope of the patent of the present invention. Under the inspiration of the present invention, those of ordinary skill in the art can also make substitutions or deformations without departing from the protection scope defined by the claims of the present invention, and all fall within the protection scope of the present invention. The scope of protection claimed by the present invention shall be subject to the appended claims.

Claims

1. A flash drying tail gas absorption device, characterized in that, It includes a tail gas absorption tower (1). One side of the top tower body of the tail gas absorption tower (1) is provided with a tail gas inlet (2), and the top of the tail gas absorption tower (1) is provided with an air outlet (3). Inside the tail gas absorption tower (1), a right-angle elbow (4) is fixedly connected to the tail gas inlet (2). One end of the right-angle elbow (4) is fixedly connected to the tail gas inlet (2), and a flow stabilizer cover (5) is installed and connected at the other end of the right-angle elbow (4). Inside the tail gas absorption tower (1) above the right-angle elbow (4), a spray pipe (6) is installed. One end of the spray pipe (6) is provided with a spray opening (7), and the spray opening (7) is located directly above the right-angle elbow (4). The other end of the spray pipe (6) is fixedly connected to a liquid inlet (8) on the tower body of the tail gas absorption tower (1), and the liquid inlet (8) is located on the opposite side of the tail gas inlet (2). Inside the tail gas absorption tower (1), a reaction pool (9) is provided below the flow stabilizer cover (5). A circulation port (10) is provided on the side of the tower body of the tail gas absorption tower (1) corresponding to the area where the reaction pool (9) is located, and a sewage discharge port (11) is provided on the side of the bottom tower body of the tail gas absorption tower (1) corresponding to the reaction pool (9). The circulation port (10) is located on the opposite side of the tail gas inlet (2), and the pipe orifice direction of the sewage discharge port (11) is in the direction of rotating 90° clockwise along the pipe orifice direction of the tail gas inlet (2). Both the circulation port (10) and the sewage discharge port (11) are communicated with the inside of the reaction pool (9).

2. The flash drying tail gas absorption device according to claim 1, characterized in that At the bottom of the tower body of the tail gas absorption tower (1) corresponding to the area where the reaction pool (9) is located, a cooling jacket (12) is provided. A cooling outlet (13) and a cooling inlet (14) are respectively provided at the top and bottom of the cooling jacket (12). The pipe orifice direction of the cooling outlet (13) is the same as the pipe orifice direction of the sewage discharge port (11), and the pipe orifice direction of the cooling inlet (14) is in the direction of rotating 45° counterclockwise along the pipe orifice direction of the tail gas inlet (2).

3. The flash drying tail gas absorption device according to claim 1, characterized in that, On the tower body of the tail gas absorption tower (1) at the height corresponding to the tail gas inlet (2), a liquid caustic soda port (15) and a water replenishing port (16) are provided. The pipe orifice direction of the liquid caustic soda port (15) is in the direction of rotating 110° clockwise along the pipe orifice direction of the tail gas inlet (2), and the pipe orifice direction of the water replenishing port (16) is the same as the pipe orifice direction of the cooling inlet (14).

4. The flash drying tail gas absorption device according to claim 1, wherein On the tower body of the tail gas absorption tower (1) at the position corresponding to the flow stabilizer cover (5), a sight glass (17) is provided; on the front of the tower body of the tail gas absorption tower (1) corresponding to the bottom of the reaction pool (9), a manhole (18) is provided; the opening directions of the sight glass (17) and the manhole (18) are in the direction of rotating 45° clockwise along the pipe orifice direction of the tail gas inlet (2).

5. The flash drying tail gas absorption device according to claim 1, characterized in that, A plurality of flow stabilizer holes (19) are uniformly arranged on the bottom surface and side surface of the flow stabilizer cover (5). The diameter of the flow stabilizer holes (19) is 25 mm, and the center distance between two adjacent flow stabilizer holes (19) is 50 mm.

6. The flash drying tail gas absorption device according to claim 1, characterized in that, A liquid level gauge is provided in the middle section of the tower body of the tail gas absorption tower (1), and liquid level gauge ports (20) are provided corresponding to the top and bottom of the liquid level gauge. The pipe orifice direction of the liquid level gauge ports (20) is in the direction of rotating 135° clockwise along the pipe orifice direction of the tail gas inlet (2).

7. A flash drying tail gas absorption device according to claim 1, characterized in that The tower body of the tail gas absorption tower (1) is made of 6mm stainless steel plate.

8. A flash drying tail gas absorption device according to claim 5, characterized in that, The flow stabilizing cover (5) is made of 3mm thick S304 stainless steel plate.

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