A waste gas treatment device for dye intermediate production

Abstract

The utility model belongs to chemical industry waste gas treatment equipment technical field, specifically disclose a dye intermediate production exhaust treatment device, including the casing, the casing is connected with the air inlet pipe, the air outlet pipe, the inner bottom side of casing is provided with the water storage warehouse, the left side of water storage warehouse is connected with the pump body, the pump body is fixedly connected with the left side of casing, the pump body is connected with the conveying pipe, the conveying pipe is fixedly connected with first water pipe and second water pipe respectively, the inner wall of casing is fixedly installed with the grating type support plate, and the grating type support plate bears the filler layer, the upper spray head is located above the filler layer, the lower spray head is located below the filler layer, the lower spray head below is provided with the filter plate, and the filter plate is fixedly connected with the inner wall of casing. The utility model sprays the grating type support plate from two directions and moistens the filler layer, reduces " the ditch flow " phenomenon that liquid forms in the filler because of gravity effect, thereby improves the overall wetting rate of the filler, has the positive role to the promotion purification efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of chemical waste gas treatment equipment, specifically a waste gas treatment device for dye intermediate production. Background Technology

[0002] Dye intermediates, broadly referring to various aromatic hydrocarbon derivatives used in the production of dyes and organic pigments, are produced from aromatic hydrocarbons such as benzene, toluene, naphthalene, and anthracene derived from coal chemical and petrochemical industries through a series of organic synthesis unit processes. The production of dye intermediates generates waste gas containing various organic compounds. Spray towers are commonly used to treat this type of waste gas. Their principle is to ensure sufficient contact between the waste gas and the absorbent liquid in a packing layer, thereby dissolving or removing pollutants. However, traditional spray towers mostly employ a top-down, single-spray method. When the liquid flows through the packing layer under gravity, it is prone to "channeling" due to uneven packing density or poor initial distribution, meaning the liquid preferentially chooses the path with less resistance, resulting in a large amount of packing material not being effectively wetted. These "dry zones" cannot participate in the gas-liquid mass transfer process, significantly reducing the overall purification efficiency and treatment capacity of the device. Therefore, there is an urgent need for a waste gas treatment device for dye intermediate production that can ensure uniform distribution of the absorbent liquid in the packing layer. Utility Model Content

[0003] The purpose of this invention is to provide a waste gas treatment device for the production of dye intermediates, so as to solve the technical problem that the existing top-down single spraying method cannot effectively wet the packing material, resulting in a reduction in waste gas treatment efficiency.

[0004] To solve the above technical problems, the technical solution of this utility model is as follows: a waste gas treatment device for dye intermediate production, comprising a shell, an inlet pipe fixedly connected to the right side of the shell, an outlet pipe fixedly connected to the upper side of the shell, a water storage tank disposed on the bottom side of the interior of the shell, a pump body connected to the left side of the water storage tank, the pump body being fixedly connected to the left side of the shell, a conveying pipe fixedly connected to the output end of the pump body, the conveying pipe being fixedly connected to a first water conveying pipe and a second water conveying pipe respectively, the other ends of the first water conveying pipe and the second water conveying pipe penetrating the shell and extending into its interior, the first water conveying pipe being fixedly connected to the outlet pipe and the second water conveying pipe being fixedly connected to the outlet pipe and the outlet ... A second water supply pipe has several upper spray pipes fixedly connected to its outer surface, and several upper spray heads fixedly connected to the outer surface of each upper spray pipe. A third water supply pipe has several lower spray pipes fixedly connected to its outer surface, and several lower spray heads fixedly connected to the outer surface of each lower spray pipe. A grid-type support plate is fixedly installed on the inner wall of the housing, and a packing layer is supported on the grid-type support plate. The upper spray heads are located above the packing layer, and the lower spray heads are located below the packing layer. A filter plate is provided below the lower spray heads, and the filter plate is fixedly connected to the inner wall of the housing.

[0005] Furthermore, the end of the air outlet pipe away from the housing is fixedly connected to a purifier, and the left end of the purifier is fixedly connected to the right side of the housing.

[0006] Furthermore, a sealing door is movably hinged to the outer surface of the housing, and a handle is fixedly installed on the outer surface of the sealing door.

[0007] Furthermore, two fastening blocks are fixedly installed on the outer surface of the handle, and the outer surface of each fastening block is fixedly connected to the outer surface of the sealing door.

[0008] Furthermore, a drain hole is provided on the outer surface of the housing, and a sealing plug is threadedly connected to the outlet of the drain hole.

[0009] Furthermore, two bases are fixedly installed on the bottom surface of the housing, and a sealing ring is fixedly installed on the outer surface of the air intake pipe, with the left side of the sealing ring being fixedly connected to the right side of the housing.

[0010] Furthermore, a fixing block is fixedly installed on the outer surface of the pump body, and the right side of the fixing block is fixedly connected to the left side of the housing.

[0011] Furthermore, two stabilizing rods are fixedly installed on the outer surface of the conveying pipe, and the right end of each stabilizing rod is fixedly connected to the left side of the housing.

[0012] This utility model has the following advantages compared with the prior art:

[0013] 1. This utility model forms a bidirectional spraying mode by setting an upper spray head above the packing layer and a lower spray head below the packing layer. It can spray the grid-type support plate and wet the packing layer from two directions, reducing the "channeling" phenomenon of liquid in the packing due to gravity, thereby improving the overall wetting rate of the packing. The bidirectional spraying makes the contact path between the absorbent liquid and the rising exhaust gas more complex, increasing the contact opportunities and time between the gas and liquid phases, which facilitates the mass transfer process of pollutants in the exhaust gas to the absorbent liquid, and has a positive effect on improving the purification efficiency.

[0014] 2. By integrating subsequent purification functions, the exhaust gas treated by spraying can enter the purifier for further treatment, thus ensuring the purification effect of the exhaust gas; the setting of the sealing door and drainage hole provides convenience for the replacement of packing, internal cleaning and discharge of waste liquid. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the waste gas treatment device of this utility model;

[0016] Figure 2 This is a three-dimensional structural diagram of the shell of this utility model;

[0017] Figure 3 This is a side-view perspective structural diagram of the housing of this utility model;

[0018] Figure 4 This is a three-dimensional cross-sectional structural diagram of the shell of this utility model;

[0019] Figure 5 This is a three-dimensional structural diagram of the conveying pipe of this utility model.

[0020] In the diagram: 1. Shell; 2. Sealing door; 3. Air outlet pipe; 4. Fastening block; 5. Handle; 6. Sealing plug; 7. Fixing block; 8. Pump body; 9. Stabilizing rod; 10. Delivery pipe; 11. First water delivery pipe; 12. Second water delivery pipe; 13. Purifier; 14. Drain hole; 15. Sealing ring; 16. Air inlet pipe; 17. Grille support plate; 18. Water storage tank; 19. Base; 20. Filter plate; 21. Upper spray pipe; 22. Upper spray head; 23. Lower spray head; 24. Lower spray pipe. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] like Figures 1 to 5 The waste gas treatment device for dye intermediate production shown includes a housing 1. An inlet pipe 16 is fixedly connected to the right side of the housing 1, and an outlet pipe 3 is fixedly connected to the upper side. The inlet pipe 16 is connected to a waste gas source. A water storage tank 18 is provided on the bottom side of the interior of the housing 1, and a water inlet pipe is provided on the upper side of the water storage tank 18. The water inlet pipe is sealed closed when no water is being added. A pump body 8, a corrosion-resistant liquid pump, is connected to the left side of the water storage tank 18. The pump body 8 is fixedly connected to the left side of the housing 1. A delivery pipe 10 is fixedly connected to the output end of the pump body 8. The delivery pipe 10 is fixedly connected to a first water delivery pipe 11 and a second water delivery pipe 12. Adjusting valves are installed on the delivery pipe 10, the first water delivery pipe 11, and the second water delivery pipe 12. The other ends of the first water delivery pipe 11 and the second water delivery pipe 12 penetrate the housing 1 and extend to… Inside, the outer surface of the first water supply pipe 11 is fixedly connected to several upper spray pipes 21, and the outer surface of each upper spray pipe 21 is fixedly connected to several upper spray heads 22. The outer surface of the second water supply pipe 12 is fixedly connected to several lower spray pipes 24, and the outer surface of each lower spray pipe 24 is fixedly connected to several lower spray heads 23. The upper spray heads 22 are positioned facing the grid-type support plate 17 below them, and the lower spray heads 23 are positioned facing the grid-type support plate 17 above them. The inner wall of the housing 1 is fixedly installed with the grid-type support plate 17, which carries a packing layer. The upper spray heads 22 are located above the packing layer, and the lower spray heads 23 are located below the packing layer. A filter plate 20 is positioned below the lower spray heads 23, and the filter plate 20 is fixedly connected to the inner wall of the housing 1.

[0023] The end of the exhaust pipe 3 furthest from the housing 1 is fixedly connected to the purifier 13, and the left end of the purifier 13 is fixedly connected to the right side of the housing 1. Connecting the exhaust pipe 3 to the purifier 13 enables secondary deep purification of the pre-treated exhaust gas, ensuring that the final emitted gas meets environmental protection standards and improving the overall purification effect of the device.

[0024] A sealing door 2 is hinged to the outer surface of the housing 1, and a handle 5 is fixedly installed on the outer surface of the sealing door 2. Operators can use the sealing door 2 to periodically inspect, replace, and maintain components such as packing inside the housing 1, improving the practicality and ease of maintenance of the device.

[0025] Two fastening blocks 4 are fixedly installed on the outer surface of the handle 5, and the outer surface of each fastening block 4 is fixedly connected to the outer surface of the sealing door 2. This strengthens the connection between the handle 5 and the sealing door 2 and prevents loosening or detachment during long-term use.

[0026] A drain hole 14 is provided on the outer surface of the housing 1, and a sealing plug 6 is threadedly connected to the outlet of the drain hole 14. The drain hole 14 is provided to facilitate the quick and thorough discharge of waste liquid in the water storage tank 18 when the equipment is stopped or when the absorbent needs to be replaced, thus simplifying the cleaning and maintenance process.

[0027] Two bases 19 are fixedly installed on the bottom surface of the housing 1, and a sealing ring 15 is fixedly installed on the outer surface of the air intake pipe 16. The left side of the sealing ring 15 is fixedly connected to the right side of the housing 1. The bases 19 provide a stable support foundation for the entire device, while the sealing ring 15 at the air intake pipe 16 enhances the airtightness of the pipe connection, effectively preventing exhaust gas leakage and ensuring operational safety.

[0028] A fixing block 7 is fixedly installed on the outer surface of the pump body 8, and the right side of the fixing block 7 is fixedly connected to the left side of the housing 1. The fixing block 7 stably fixes the pump body 8 to the side of the housing 1, effectively distributing the weight of the pump body 8 and extending the service life of the equipment.

[0029] Two stabilizing rods 9 are fixedly installed on the outer surface of the delivery pipe 10, and the right end of each stabilizing rod 9 is fixedly connected to the left side of the housing 1. The delivery pipe 10 is fixed at multiple points by the two stabilizing rods 9, which enhances the structural stability of the pipeline system and prevents the pipeline from shaking and causing noise due to water flow impact when the pump body 8 is working.

[0030] The specific working process of this utility model is as follows:

[0031] The waste gas containing pollutants enters the housing 1 through the inlet pipe 16 and flows upward through the packing layer on the grid-type support plate 17. The pump 8 is started to pump the absorbent liquid from the water storage tank 18, which is then transported via the delivery pipe 10 to the first water supply pipe 11 and the second water supply pipe 12. The first water supply pipe 11 distributes the absorbent liquid to the upper spray pipe 21, which sprays it downward through the upper spray head 22 located above the packing layer; the second water supply pipe 12 distributes the absorbent liquid to the lower spray pipe 24, which sprays it upward through the lower spray head 23 located below the packing layer. The absorbent liquid flowing from top to bottom and bottom to top fully contacts the waste gas flowing from bottom to top in the packing layer, dissolving or capturing the pollutants in the waste gas. After use, the absorbent liquid falls back to the bottom of the housing 1 under gravity. Some of the liquid is initially intercepted and filtered by the filter plate 20 and also flows back to the water storage tank 18, allowing for recycling or periodic replacement. After being sprayed and washed, the gas continues to rise and enters the purifier 13 through the exhaust pipe 3 for possible further deep treatment, eventually meeting emission standards. When maintenance or replacement of the packing material is required, the sealing door 2 can be opened for operation. When it is necessary to replace or drain the waste liquid in the water storage tank 18, the sealing plug 6 at the drain hole 14 can be opened.

Claims

1. A waste gas treatment device for dye intermediate production, comprising a shell (1), characterized in that: An air inlet pipe (16) is fixedly connected to the right side of the housing (1), and an air outlet pipe (3) is fixedly connected to the upper side. A water storage tank (18) is provided on the bottom side of the interior of the housing (1). A pump body (8) is connected to the left side of the water storage tank (18). The pump body (8) is fixedly connected to the left side of the housing (1). A delivery pipe (10) is fixedly connected to the output end of the pump body (8). A first water delivery pipe (11) and a second water delivery pipe (12) are fixedly connected to the delivery pipe (10). The other ends of the first water delivery pipe (11) and the second water delivery pipe (12) penetrate the housing (1) and extend into its interior. A plurality of upper spray pipes (21) are fixedly connected to the outer surface of the first water delivery pipe (11). The outer surface of the upper spray pipe (21) is fixedly connected to several upper spray heads (22), the outer surface of the second water supply pipe (12) is fixedly connected to several lower spray pipes (24), the outer surface of the lower spray pipes (24) is fixedly connected to several lower spray heads (23), the inner wall of the shell (1) is fixedly installed with a grid-type support plate (17), the grid-type support plate (17) carries a packing layer; the upper spray head (22) is located above the packing layer, the lower spray head (23) is located below the packing layer, the lower spray head (23) is provided with a filter plate (20) below the lower spray head (23), and the filter plate (20) is fixedly connected to the inner wall of the shell (1).

2. The waste gas treatment device for dye intermediate production according to claim 1, characterized in that: The air outlet pipe (3) is fixedly connected to a purifier (13) at one end away from the housing (1), and the left end of the purifier (13) is fixedly connected to the right side of the housing (1).

3. The waste gas treatment device for dye intermediate production according to claim 1, characterized in that: A sealing door (2) is movably hinged to the outer surface of the housing (1), and a handle (5) is fixedly installed on the outer surface of the sealing door (2).

4. The waste gas treatment device for dye intermediate production according to claim 3, characterized in that: Two fastening blocks (4) are fixedly installed on the outer surface of the handle (5), and the outer surface of each fastening block (4) is fixedly connected to the outer surface of the sealing door (2).

5. The waste gas treatment device for dye intermediate production according to claim 1, characterized in that: The outer surface of the housing (1) is provided with a drain hole (14), and a sealing plug (6) is threadedly connected to the outlet of the drain hole (14).

6. The waste gas treatment device for dye intermediate production according to claim 1, characterized in that: Two bases (19) are fixedly installed on the bottom surface of the housing (1), and a sealing ring (15) is fixedly installed on the outer surface of the air intake pipe (16). The left side of the sealing ring (15) is fixedly connected to the right side of the housing (1).

7. The waste gas treatment device for dye intermediate production according to claim 1, characterized in that: A fixing block (7) is fixedly installed on the outer surface of the pump body (8), and the right side of the fixing block (7) is fixedly connected to the left side of the housing (1).

8. The waste gas treatment device for dye intermediate production according to claim 1, characterized in that: Two stabilizing rods (9) are fixedly installed on the outer surface of the delivery pipe (10), and the right end of each stabilizing rod (9) is fixedly connected to the left side of the housing (1).

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