Reduction circulation desulfurization device

Abstract

The utility model relates to the technical field of desulfurization, in particular to a reduction circulation desulfurization device which comprises a desulfurization tower, a box body is arranged on the inner wall of the bottom of the desulfurization tower, two mounting holes are formed in the top of the box body, control assemblies are arranged in the two mounting holes, and the control assemblies are used for controlling alkali liquor in the desulfurization tower to enter the box body; the aeration assembly is rotationally arranged at the bottom of the box body, and the aeration assembly is used for injecting air into alkali liquor in the box body. Air can be input into the connecting cylinder through the air supply pipe, then enters each hollow pipe through the connecting cylinder, and finally is output through the through holes in the hollow pipes; the oxygen in the air promotes the sulfite radical in the alkali liquor in the box body to be oxidized into the sulfate radical so as to facilitate the formation of calcium sulfate, and in the process, the alkali liquor is reduced into the alkali liquor with higher purity so as to improve the dissolving efficiency of sulfur dioxide gas in the subsequent desulfurization work.

Description

Technical Field

[0001] The utility model relates to the technical field of desulfurization, in particular to a reduction cycle desulfurization device. Background Art

[0002] Sulfur dioxide gas in industrial waste gas is an atmospheric pollutant. Therefore, in order to protect the environment, it is necessary to treat the sulfur dioxide gas in the waste gas to prevent it from being directly discharged into the atmosphere. At present, desulfurization treatment mostly uses alkaline solution spraying gas to dissolve the sulfur dioxide gas in the waste gas in the alkaline solution, and then combine with the calcium ions in the alkaline solution to form calcium sulfate precipitation to achieve the purpose of desulfurization.

[0003] In the prior art, during the contact between waste gas and alkali solution, sulfur dioxide gas in the waste gas dissolves in the alkali solution to form sulfate ions. After the sulfate ions come into contact with calcium ions in the alkali solution, calcium sulfate precipitates are formed, thereby achieving desulfurization treatment. Sulfite ions also exist in the alkali solution. High concentrations of sulfite ions will affect the solubility of sulfur dioxide gas in the alkali solution. Therefore, in order to ensure long-term and efficient desulfurization work, the alkali solution needs to be reduced to ensure the purity of the alkali solution during the desulfurization process. Utility Model Content

[0004] The purpose of the utility model is to provide a reduction cycle desulfurization device to solve the problems raised in the above background technology.

[0005] The technical solution of the utility model is: a reduction cycle desulfurization device, comprising:

[0006] A desulfurization tower, wherein a box is provided on the inner wall at the bottom of the desulfurization tower, and two mounting holes are provided on the top of the box. A control component is provided in each of the two mounting holes, and the control component is used to control the alkali solution in the desulfurization tower to enter the box;

[0007] An aeration assembly, the aeration assembly is rotatably arranged at the bottom of the box, and the aeration assembly is used to inject air into the alkali solution in the box;

[0008] A desulfurization component, wherein the desulfurization component is arranged on the inner side wall of the desulfurization tower;

[0009] A circulation component, wherein the circulation component is arranged on the side wall of the desulfurization tower, one end of the circulation component is connected to the box body, and the other end of the circulation component is connected to the desulfurization component;

[0010] Wherein, the aeration component comprises:

[0011] A connecting cylinder, which is rotatably arranged on the inner wall of the bottom of the box body and passes through the bottom of the desulfurization tower;

[0012] A plurality of hollow tubes, wherein the plurality of hollow tubes are arranged at equal distances on the side wall of the connecting tube, and each hollow tube is connected to the connecting tube, and each hollow tube has a plurality of through holes at the bottom;

[0013] A sealing plate, wherein the sealing plate is fixed to the bottom of the desulfurization tower, and the sealing plate is rotatably connected to the bottom of the connecting cylinder;

[0014] An air supply pipe, which is arranged on the top of the sealing plate and passes through the bottom of the sealing plate;

[0015] An exhaust pipe, one end of which passes through the inner wall of the top of the box body, and the other end of which passes through the outer wall of the desulfurization tower.

[0016] Preferably, it also includes:

[0017] A sealing ring, wherein the sealing ring is fixedly sleeved on the air supply pipe, and the sealing ring is fixed to the inner side wall of the connecting tube;

[0018] A plurality of circular holes are equidistantly arranged on the side wall of the connecting tube, and each circular hole is located below the sealing ring.

[0019] Preferably, the control component comprises:

[0020] A tube body, wherein the tube body is fixed in the mounting hole, and the bottom end of the tube body is lower than the bottom end of the exhaust pipe;

[0021] A bracket, wherein the bracket is fixed on the top of the box;

[0022] A rod body, the rod body is slidably inserted on the top of the bracket, and a plug is provided at the bottom end of the rod body, and the plug is used to seal the tube body;

[0023] A spring, one end of which is fixed to the plug, and the other end of which is fixed to the bottom of the bracket.

[0024] Preferably, the desulfurization component comprises:

[0025] A placing plate, the placing plate is fixed on the inner wall of the desulfurization tower, the bottom of the placing plate is a porous structure, and the placing plate is used to place fillers;

[0026] A connecting pipe, wherein the connecting pipe is fixed in the desulfurization tower and is located above the placement plate;

[0027] A plurality of nozzles are arranged on the side wall of the connecting pipe at equal distances, and each nozzle is connected to the connecting pipe.

[0028] Preferably, the circulation component comprises:

[0029] A pump box, wherein the pump box is arranged on the side wall of the desulfurization tower, and an alkali liquid pump is arranged in the pump box;

[0030] A liquid extraction pipe, which is arranged on the input port of the alkali solution pump and passes through the upper part of the inner wall of the box body;

[0031] An infusion tube, which is arranged on the output port of the alkali solution pump and is connected to the connecting tube;

[0032] The valve is arranged on the side wall of the infusion tube.

[0033] Preferably, it also includes:

[0034] A motor, wherein the motor is arranged on the top of the desulfurization tower;

[0035] A rotating shaft, wherein the rotating shaft is fixed to the top of the connecting cylinder, and the rotating shaft and the output shaft of the motor are fixed;

[0036] A plurality of plate bodies are fixed on the side wall of the rotating shaft, each of the plate bodies is a porous structure, and each of the plate bodies is located above the box body.

[0037] Preferably, it also includes:

[0038] An inlet pipe, which is arranged through the side wall of the desulfurization tower and is located below the plate body;

[0039] An output pipe, the output pipe is arranged through the top of the desulfurization tower;

[0040] A liquid inlet pipe is arranged through the top of the side wall of the desulfurization tower.

[0041] The utility model provides a reduction cycle desulfurization device through improvement, which has the following improvements and advantages compared with the prior art:

[0042] The utility model provides a connecting tube, an air supply pipe, a hollow tube and a box body, so that air can be input into the connecting tube through the air supply pipe, then enter each hollow tube through the connecting tube, and finally output through the through holes on the hollow tubes. Oxygen in the air promotes the oxidation of sulfite in the alkali solution in the box body into sulfate, so as to facilitate the formation of calcium sulfate. In this process, the alkali solution is reduced to alkali solution with higher purity, so as to improve the dissolution efficiency of sulfur dioxide gas in subsequent desulfurization work. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The utility model is further explained below in conjunction with the accompanying drawings and embodiments:

[0044] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0045] Figure 2 It is a schematic diagram of the structure of the desulfurization tower, inlet pipe and exhaust pipe of the utility model;

[0046] Figure 3 This is a schematic diagram of the cross-sectional structure of the desulfurization tower of the utility model;

[0047] Figure 4 It is a schematic diagram of the cross-sectional structure of the box body of the utility model;

[0048] Figure 5 The utility model Figure 4 A schematic diagram of the partially enlarged structure at center A;

[0049] Figure 6 It is a schematic diagram of the cross-sectional structure of the connecting tube of the utility model.

[0050] Description of reference numerals:

[0051] 1. Desulfurization tower; 2. Output pipe; 3. Motor; 4. Pump box; 5. Liquid infusion pipe; 6. Valve; 7. Liquid inlet pipe; 8. Exhaust pipe; 9. Placement plate; 10. Connecting pipe; 11. Nozzle; 12. Rotating shaft; 13. Plate body; 14. Liquid extraction pipe; 15. Box body; 16. Input pipe; 17. Connecting tube; 18. Hollow tube; 19. Round hole; 20. Spring; 21. Plug; 22. Rod body; 23. Tube body; 24. Bracket; 25. Sealing plate; 26. Air supply pipe; 27. Sealing ring. DETAILED DESCRIPTION

[0052] The utility model is described in detail below, and the technical solutions in the embodiments of the utility model are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0053] The utility model provides a reduction cycle desulfurization device through improvement. The technical solution of the utility model is:

[0054] like Figure 1-Figure 6 As shown, a reduction cycle desulfurization device comprises:

[0055] Desulfurization tower 1, the inner wall at the bottom of desulfurization tower 1 is provided with a box body 15, the top of box body 15 is provided with two mounting holes, and control components are provided in both mounting holes, and the control components are used to control the alkali solution in desulfurization tower 1 to enter box body 15;

[0056] An aeration assembly, which is rotatably disposed at the bottom of the box 15 and is used to inject air into the alkali solution in the box 15;

[0057] A desulfurization component, which is arranged on the inner wall of the desulfurization tower 1;

[0058] A circulation component, which is arranged on the side wall of the desulfurization tower 1, one end of which is connected to the box 15, and the other end of which is connected to the desulfurization component;

[0059] Among them, the aeration components include:

[0060] A connecting tube 17, which is rotatably disposed on the inner wall of the bottom of the box body 15, and the connecting tube 17 passes through the bottom of the desulfurization tower 1;

[0061] A plurality of hollow tubes 18, which are arranged at equal distances on the side wall of the connecting tube 17, and each hollow tube 18 is connected to the connecting tube 17, and each hollow tube 18 has a plurality of through holes at the bottom;

[0062] The sealing plate 25 is fixed to the bottom of the desulfurization tower 1, and the sealing plate 25 is rotatably connected to the bottom of the connecting tube 17;

[0063] An air supply pipe 26, which is disposed on the top of the sealing plate 25 and passes through the bottom of the sealing plate 25;

[0064] The exhaust pipe 8 has one end that penetrates the top inner wall of the box body 15 , and the other end that penetrates the outer side wall of the desulfurization tower 1 .

[0065] After air is injected through the air supply pipe 26, the air enters the hollow tube 18 through the connecting tube 17, and then dispersed in the alkaline solution in the box 15 through the through holes. The oxygen in the air converts the sulfite in the alkaline solution into sulfate to form calcium sulfate precipitation, and then reduces the alkaline solution with lower purity to alkaline solution with higher purity, so that sulfur dioxide can be dissolved in the alkaline solution in the subsequent desulfurization treatment process.

[0066] Furthermore, it also includes:

[0067] The sealing ring 27 is fixedly sleeved on the air supply pipe 26, and the sealing ring 27 is fixed to the inner wall of the connecting tube 17;

[0068] A plurality of circular holes 19 are provided on the side wall of the connecting tube 17 at equal distances, and each circular hole 19 is located below the sealing ring 27 .

[0069] After the desulfurization work is completed, the sealing plate 25 can be removed. Under the action of gravity, the alkali liquid in the box body 15 enters the connecting tube 17 through the circular hole 19 on the connecting tube 17. Due to the sealing effect of the sealing ring 27, the alkali liquid in the box body 15 can be discharged through the circular hole 19 and the connecting tube 17. In this process, the calcium sulfate precipitate is discharged accordingly to realize the cleaning of the calcium sulfate in the desulfurization tower 1.

[0070] Furthermore, the control component includes:

[0071] The tube body 23 is fixed in the mounting hole, and the bottom end of the tube body 23 is lower than the bottom end of the exhaust pipe 8;

[0072] A bracket 24, the bracket 24 is fixed on the top of the box 15;

[0073] The rod body 22 is slidably inserted on the top of the bracket 24, and a plug 21 is provided at the bottom of the rod body 22, and the plug 21 is used to seal the tube body 23;

[0074] The spring 20 has one end fixed to the plug 21 , and the other end fixed to the bottom of the bracket 24 .

[0075] As the amount of alkali liquid above the box 15 increases, the pressure of the alkali liquid on the plug 21 increases until the plug 21 is pushed down. After the plug 21 is lowered, the alkali liquid enters the box 15 through the gap between the tube 23 and the plug 21. As the alkali liquid is continuously added, the liquid level of the alkali liquid in the box 15 rises until the alkali liquid in the box 15 submerges the bottom end of the liquid extraction pipe 14 and the bottom end of the tube 23. When the alkali liquid above the box 15 is low, the plug 21 seals the tube 23 under the action of the spring 20, so that a certain amount of alkali liquid is always retained in the space above the box 15 in the desulfurization tower 1

[0076] Furthermore, the desulfurization component includes:

[0077] A placing plate 9 is fixed on the inner wall of the desulfurization tower 1. The bottom of the placing plate 9 is a porous structure. The placing plate 9 is used to place fillers.

[0078] A connecting pipe 10, which is fixed in the desulfurization tower 1 and is located above the placement plate 9;

[0079] A plurality of nozzles 11 are arranged at equal distances on the side wall of the connecting pipe 10 , and each nozzle 11 is connected to the connecting pipe 10 .

[0080] Furthermore, the loop component includes:

[0081] A pump box 4, which is arranged on the side wall of the desulfurization tower 1, and a lye pump is arranged in the pump box 4;

[0082] A liquid extraction pipe 14, which is arranged on the input port of the alkali solution pump and passes through the upper part of the inner wall of the box body 15;

[0083] The infusion tube 5 is arranged on the output port of the alkali solution pump, and the infusion tube 5 is connected with the connecting tube 10;

[0084] The valve 6 is arranged on the side wall of the infusion tube 5 through the valve 6 .

[0085] Furthermore, it also includes:

[0086] Motor 3, which is arranged on the top of the desulfurization tower 1;

[0087] The rotating shaft 12 is fixed to the top of the connecting tube 17, and the rotating shaft 12 and the output shaft of the motor 3 are fixed;

[0088] A plurality of plates 13 are fixed on the side wall of the rotating shaft 12 , each of the plates 13 is a porous structure, and each of the plates 13 is located above the box 15 .

[0089] During the rotation of the plate 13 , the alkali solution on the box 15 in the desulfurization tower 1 rotates, so that the calcium sulfate precipitate in the alkali solution can be gathered in the middle above the box 15 , making it easier for the precipitate to enter the box 15 through the pipe 23 .

[0090] Furthermore, it also includes:

[0091] An inlet pipe 16 is provided through the side wall of the desulfurization tower 1 and is located below the plate body 13;

[0092] An output pipe 2 is provided through the top of the desulfurization tower 1;

[0093] The liquid inlet pipe 7 is arranged through the top of the side wall of the desulfurization tower 1.

[0094] Specifically, the working principle:

[0095] When in use, the waste gas pipeline to be treated is connected to the input pipe 16, and the output pipe 2 is connected to the subsequent gas processing equipment;

[0096] A certain amount of alkali liquid is added to the desulfurization tower 1 through the liquid inlet pipe 7. As the amount of alkali liquid increases, the pressure of the alkali liquid on the plug 21 increases until the plug 21 is pushed down. After the plug 21 is lowered, the alkali liquid enters the box body 15 through the gap between the tube body 23 and the plug 21. As the alkali liquid is continuously added, the liquid level of the alkali liquid in the box body 15 rises until the alkali liquid in the box body 15 submerges the bottom end of the liquid extraction pipe 14 and the bottom end of the tube body 23. When the alkali liquid above the box body 15 is low, the plug 21 seals the tube body 23 under the action of the spring 20, so that a certain amount of alkali liquid is always retained in the space above the box body 15 in the desulfurization tower 1;

[0097] Connect the air supply pipe 26 to the air compressor;

[0098] During desulfurization, the exhaust gas enters the space above the box 15 in the desulfurization tower 1 through the inlet pipe 16, and is preliminarily mixed with the alkali solution above the box 15. At this time, the switch of the motor 3 is turned on. When the motor 3 is working, the shaft 12 is driven to rotate, thereby driving the plate 13 to rotate. Through the porous structure on the plate 13, the exhaust gas and the alkali solution above the box 15 in the desulfurization tower 1 are fully mixed, and the exhaust gas is preliminarily desulfurized.

[0099] The alkali liquid pump is switched on. When the alkali liquid pump is working, the alkali liquid in the box 15 is extracted through the liquid extraction pipe 14, and pumped into the connecting pipe 10 through the liquid delivery pipe 5, and then sprayed out through the nozzle 11, so that the alkali liquid is evenly attached to the surface of the filling material on the placement plate 9. The contact area between the alkali liquid and the exhaust gas is increased by the filling material. As the exhaust gas therein rises, the exhaust gas contacts the alkali liquid on the surface of the filling material, and a secondary desulfurization treatment is performed;

[0100] The alkali liquid outputted through the nozzle 11 will be in the space above the box 15 in the desulfurization tower 1. Similarly, when the amount of alkali liquid on the box 15 reaches a certain level, the plug 21 will be pushed open and enter the box 15, so that during the desulfurization operation, the alkali liquid above the box 15 in the desulfurization tower 1 and the alkali liquid in the box 15 are in a dynamic equilibrium state. The switch of the air compressor is turned on, and the air compressor compresses the air and inputs it into the connecting tube 17 through the air supply pipe 26, and then enters each hollow tube 18 through the connecting tube 17, and finally outputs it through the through hole on the hollow tube 18. The oxygen in the air promotes the oxidation of sulfite in the alkali liquid in the box 15 into sulfate, so as to facilitate the formation of calcium sulfate. In the process of injecting air, since the liquid level in the box 15 always submerges the tube 23, the gas in the box 15 is output through the exhaust pipe 8 to ensure that the air pressure in the box 15 is constant.

[0101] In this process, the alkali solution is reduced to a higher purity alkali solution to improve the dissolution efficiency of sulfur dioxide gas in the subsequent desulfurization work;

[0102] After the desulfurization work has been carried out for a period of time, the switch of valve 6 is turned on, and the low-concentration alkali solution is output through the liquid infusion pipe 5 and valve 6, and then the high-concentration alkali solution is injected into the desulfurization tower 1 through the liquid inlet pipe 7 to ensure the continuous progress of the desulfurization work;

[0103] After the desulfurization work is completed, the sealing plate 25 can be removed. Under the action of gravity, the alkali liquid in the box body 15 enters the connecting tube 17 through the circular hole 19 on the connecting tube 17. Due to the sealing effect of the sealing ring 27, the alkali liquid in the box body 15 can be discharged through the circular hole 19 and the connecting tube 17. In this process, the calcium sulfate precipitate is discharged accordingly to realize the cleaning of the calcium sulfate in the desulfurization tower 1.

Claims

1. A reduction cycle desulfurization device, characterized in that: include: A desulfurization tower (1), wherein a box (15) is provided on the inner wall of the bottom of the desulfurization tower (1), and two mounting holes are provided on the top of the box (15), and control components are provided in both mounting holes, and the control components are used to control the alkali solution in the desulfurization tower (1) to enter the box (15); an aeration assembly, the aeration assembly being rotatably disposed at the bottom of the box (15), the aeration assembly being used to inject air into the alkaline solution in the box (15); A desulfurization component, wherein the desulfurization component is arranged on the inner wall of the desulfurization tower (1); A circulation component, the circulation component being arranged on the side wall of the desulfurization tower (1), one end of the circulation component being connected to the box (15), and the other end of the circulation component being connected to the desulfurization component; Wherein, the aeration component comprises: A connecting tube (17), wherein the connecting tube (17) is rotatably arranged on the inner wall of the bottom of the box body (15), and the connecting tube (17) passes through the bottom of the desulfurization tower (1); A plurality of hollow tubes (18), wherein the plurality of hollow tubes (18) are arranged at equal distances on the side wall of the connecting tube (17), and each hollow tube (18) is connected to the connecting tube (17), and each hollow tube (18) is provided with a plurality of through holes at the bottom; A sealing plate (25), wherein the sealing plate (25) is fixed to the bottom of the desulfurization tower (1), and the sealing plate (25) is rotatably connected to the bottom of the connecting cylinder (17); An air supply pipe (26), wherein the air supply pipe (26) is arranged on the top of the sealing plate (25), and the air supply pipe (26) passes through the bottom of the sealing plate (25); An exhaust pipe (8), one end of the exhaust pipe (8) penetrates the inner wall of the top of the box body (15), and the other end of the exhaust pipe (8) penetrates the outer wall of the desulfurization tower (1).

2. A reduction cycle desulfurization device according to claim 1, characterized in that: Also includes: A sealing ring (27), wherein the sealing ring (27) is fixedly sleeved on the air supply pipe (26), and the sealing ring (27) is fixed to the inner side wall of the connecting tube (17); A plurality of circular holes (19) are provided at equal distances on the side wall of the connecting tube (17), and each circular hole (19) is located below the sealing ring (27).

3. A reduction cycle desulfurization device according to claim 1, characterized in that: The control component comprises: A tube body (23), wherein the tube body (23) is fixed in the mounting hole, and the bottom end of the tube body (23) is lower than the bottom end of the exhaust pipe (8); A bracket (24), wherein the bracket (24) is fixed on the top of the box (15); A rod body (22), the rod body (22) is slidably inserted on the top of the bracket (24), and a plug (21) is provided at the bottom end of the rod body (22), and the plug (21) is used to seal the tube body (23); A spring (20), one end of the spring (20) is fixed to the plug (21), and the other end of the spring (20) is fixed to the bottom of the bracket (24).

4. A reduction cycle desulfurization device according to claim 1, characterized in that: The desulfurization component comprises: A placement plate (9), the placement plate (9) being fixed on the inner wall of the desulfurization tower (1), the bottom of the placement plate (9) being a porous structure, and the placement plate (9) being used to place filler; A connecting pipe (10), wherein the connecting pipe (10) is fixed in the desulfurization tower (1), and the connecting pipe (10) is located above the placement plate (9); A plurality of nozzles (11) are arranged at equal distances on the side wall of the connecting pipe (10), and each nozzle (11) is connected to the connecting pipe (10).

5. A reduction cycle desulfurization device according to claim 3, characterized in that: The loop components include: A pump box (4), the pump box (4) being arranged on the side wall of the desulfurization tower (1), and a lye pump being arranged in the pump box (4); A liquid extraction pipe (14), wherein the liquid extraction pipe (14) is arranged on the input port of the alkali solution pump, and the liquid extraction pipe (14) passes through the upper part of the inner side wall of the box body (15); A liquid infusion tube (5), wherein the liquid infusion tube (5) is arranged on the output port of the alkali solution pump, and the liquid infusion tube (5) is connected to the connecting tube (10); A valve (6) is provided through the side wall of the infusion tube (5).

6. A reduction cycle desulfurization device according to claim 1, characterized in that: Also includes: A motor (3), wherein the motor (3) is arranged on the top of the desulfurization tower (1); A rotating shaft (12), wherein the rotating shaft (12) is fixed to the top of the connecting cylinder (17), and the rotating shaft (12) and the output shaft of the motor (3) are fixed; A plurality of plate bodies (13) are fixed on the side wall of the rotating shaft (12), each of the plate bodies (13) is a porous structure, and each of the plate bodies (13) is located above the box body (15).

7. A reduction cycle desulfurization device according to claim 6, characterized in that: Also includes: An inlet pipe (16), the inlet pipe (16) is arranged through the side wall of the desulfurization tower (1), and the inlet pipe (16) is located below the plate body (13); An output pipe (2), wherein the output pipe (2) is arranged through the top of the desulfurization tower (1); A liquid inlet pipe (7), wherein the liquid inlet pipe (7) is arranged through the top of the side wall of the desulfurization tower (1).

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