Boiler flue gas purification device

Abstract

The utility model discloses a boiler flue gas purification device which comprises a tower body and a gas inlet pipe, a diffusion assembly is arranged at the end of the gas inlet pipe, the diffusion assembly comprises a diffusion cylinder and a driving motor, a plurality of diffusion holes are formed in the surface of the diffusion cylinder, a plurality of connecting shafts are arranged on the outer side of a rotating table, and a sealing plate is arranged at one end of each connecting shaft. The entering flue gas is guided into the desulfurization liquid at the bottom of the tower body through the diffusion assembly, impurities in the flue gas can be removed, the phenomenon that the impurities are accumulated on the surface of the sieve plate to affect the mixing effect of the flue gas is avoided, the desulfurization liquid for removing the impurities in the flue gas is the reuse of the desulfurization liquid sprayed by the spraying assembly, the utilization rate of the desulfurization liquid is increased, and meanwhile, the desulfurization effect is improved. The diffusion assembly can diffuse the flue gas in multiple directions, and the rotating sealing plate can intermittently diffuse the flue gas while ensuring the internal pressure of the diffusion barrel, so that the cleaning efficiency of the flue gas is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste gas treatment, and particularly relates to a boiler flue gas purification device. Background Technique

[0002] Boiler flue gas refers to the waste gas containing various gases and solid particles generated during the combustion process. These flue gases mainly contain the following components: carbon dioxide, carbon monoxide, nitrogen oxides, sulfur oxides, and particulate matter. When wet desulfurization treatment is carried out on the flue gas, mainly desulfurization liquids such as limestone (CaCO3), quicklime (CaO), or sodium carbonate (Na2CO3) are used as detergents to wash the flue gas in the reaction tower, thereby removing SO2 in the flue gas.

[0003] In Patent CN201310308518.7, a wet flue gas desulfurization tower is mentioned. The flue gas is evenly distributed through the provided sieve plate to make it fully contact with the desulfurization liquid, so as to improve the desulfurization effect of the flue gas. However, the flue gas contains certain impurities, which will accumulate on the surface of the sieve plate after long-term use, affecting the mixing effect of the flue gas. Summary of the Utility Model

[0004] Aiming at the problem that impurities in the flue gas will accumulate on the surface of the sieve plate and affect the mixing effect of the flue gas in the prior art, the utility model proposes the following technical solutions:

[0005] A boiler flue gas purification device includes: a tower body and an air inlet pipe. A diffusion assembly is arranged at the end of the air inlet pipe, and the diffusion assembly is located in the desulfurization liquid collected at the bottom of the tower body. The diffusion assembly includes a diffusion cylinder and a driving motor. A plurality of diffusion holes are formed on the surface of the diffusion cylinder. A rotating table connected to the output end of the driving motor is rotatably inserted into the diffusion cylinder. A plurality of connecting shafts are arranged on the outer side of the rotating table, and a closing plate is arranged at one end of each connecting shaft.

[0006] Preferably, as the above technical solution, it further includes a spraying assembly, which is composed of a spraying pipe and a plurality of spray heads. The spray heads atomize and spray the desulfurization liquid into the tower body.

[0007] Preferably, as the above technical solution, a hole plate is arranged at the bottom of the spraying assembly, and the outer side of the hole plate is fixedly connected to the inner wall of the tower body.

[0008] Preferably, as the above technical solution, an exhaust pipe is arranged at the top of the tower body, and the exhaust pipe is used to discharge the purified flue gas.

[0009] Preferably, as the above technical solution, a cyclone plate dehydrator is arranged at the top of the spraying assembly, and the cyclone plate dehydrator is hermetically arranged on the surface of the inner wall of the tower body.

[0010] Preferably, as the above technical solution, a drain pipe is provided at the bottom of the tower body. An electromagnetic valve is provided at one section of the drain pipe, and the drain pipe is connected to an external desulfurization liquid treatment system.

[0011] Preferably, as the above technical solution, the closing plate is arc-shaped and matches the diffusion cylinder.

[0012] Preferably, as the above technical solution, a rubber layer is provided on the surface of the closing plate, and the closing plate is attached to the inner wall of the diffusion cylinder through the rubber layer.

[0013] Preferably, as the above technical solution, the driving motor is located on the top of the desulfurization liquid level, and the surface of the driving motor is coated with an anti-corrosion coating.

[0014] Preferably, as the above technical solution, a plurality of the connecting shafts are circumferentially and equidistantly arranged relative to the center of the rotating table, and the connecting shafts are detachably installed on the surface of the rotating table.

[0015] The beneficial effects of the present utility model are as follows:

[0016] 1. The incoming flue gas is introduced into the desulfurization liquid at the bottom of the tower body through the diffusion assembly, which can remove impurities in the flue gas, avoid the accumulation of impurities on the surface of the sieve plate and affect the mixing effect of the flue gas. Moreover, the desulfurization liquid for removing impurities from the flue gas is the reuse of the desulfurization liquid sprayed by the spraying assembly, improving the utilization rate of the desulfurization liquid;

[0017] 2. The diffusion assembly can diffuse the flue gas in multiple directions, and the rotating closing plate can diffuse the flue gas intermittently while ensuring the pressure inside the diffusion cylinder, thereby increasing the cleaning efficiency of the flue gas. Description of the Drawings

[0018] Figure 1 Shows the overall structural schematic diagram of the embodiment;

[0019] Figure 2 Shows the main view sectional view of the diffusion cylinder in the embodiment;

[0020] Figure 3 Shows the top view sectional view of the diffusion cylinder in the embodiment.

[0021] In the figure: 10, tower body; 11, exhaust pipe; 12, drain pipe; 20, intake pipe; 30, diffusion assembly; 31, diffusion cylinder; 32, diffusion hole; 33, closing plate; 34, rotating table; 35, connecting shaft; 36, driving motor; 41, spray pipe; 42, spray head; 50, hole plate; 60, cyclone plate dehydrator. Detailed Embodiments

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings of the specification.

[0023] Embodiment

[0024] Figures 1-3 In an embodiment, a boiler flue gas purification device includes a tower body 10 and an inlet pipe 20. A diffusion assembly 30 is provided at the end of the inlet pipe 20. The diffusion assembly 30 is located in the desulfurization liquid collected at the bottom of the tower body 10. The diffusion assembly 30 includes a diffusion cylinder 31 and a drive motor 36. A plurality of diffusion holes 32 are formed on the surface of the diffusion cylinder 31. A rotating table 34 connected to the output end of the drive motor 36 is rotatably inserted into the diffusion cylinder 31. A plurality of connecting shafts 35 are provided on the outer side of the rotating table 34. One end of each connecting shaft 35 is provided with a closing plate 33.

[0025] The closing plate 33 is arc-shaped and matches the diffusion cylinder 31.

[0026] A rubber layer is provided on the surface of the closing plate 33, and the closing plate 33 is attached to the inner wall of the diffusion cylinder 31 through the rubber layer.

[0027] The drive motor 36 is located above the water level of the desulfurization liquid, and an anti-corrosion coating is applied on the surface of the drive motor 36.

[0028] The plurality of connecting shafts 35 are circumferentially equidistantly arranged relative to the center of the rotating table, and the connecting shafts 35 are detachably installed on the surface of the rotating table 34.

[0029] The incoming flue gas is introduced into the desulfurization liquid at the bottom of the tower body 10 through the diffusion assembly 30, so that impurities in the flue gas can be removed, preventing the impurities from accumulating on the surface of the sieve plate and affecting the mixing effect of the flue gas. Moreover, the desulfurization liquid used for removing impurities from the flue gas is a reuse of the desulfurization liquid sprayed by the spraying assembly, improving the utilization rate of the desulfurization liquid. At the same time, the diffusion assembly 30 can diffuse the flue gas in multiple directions, and the rotating closing plate 33 can diffuse the flue gas intermittently while ensuring the pressure inside the diffusion cylinder 31, thereby increasing the cleaning efficiency of the flue gas.

[0030] Figure 2

[0031] In the embodiment, it further includes a spraying assembly, which is composed of a spraying pipe 41 and a plurality of spray heads 42. The spray heads 42 atomize and spray the desulfurization liquid into the tower body 10. Desulfurization liquid flows from the spraying pipe 41 to the plurality of spray heads 42, and the spray heads 42 atomize and spray the desulfurization liquid to treat the flue gas.

[0032] Figure 1Among them, a perforated plate 50 is arranged at the bottom of the spray component, and the outer side of the perforated plate 50 is fixedly connected to the inner wall of the tower body 10.

[0033] The arrangement of the perforated plate 50 enables the flue gas to be evenly distributed and rise, allowing the flue gas to come into full contact with the sprayed desulfurization liquid, and achieving a better desulfurization effect.

[0034] Figure 1 Among them, a cyclone plate dehydrator 60 is arranged at the top of the spray component, and the cyclone plate dehydrator 60 is hermetically arranged on the surface of the inner wall of the tower body 10.

[0035] After the cyclone plate dehydrator 60 operates, a swirl is generated, causing the water mist in the flue gas to be thrown towards the pipe wall under the action of the swirling flow, thereby removing the water mist in the flue gas.

[0036] Figure 1 Among them, an exhaust pipe 11 is arranged at the top of the tower body 10, and a drain pipe 12 is arranged at the bottom of the tower body 10. The exhaust pipe 11 is used to discharge the purified flue gas.

[0037] The drain pipe 12 is connected to an external desulfurization liquid treatment system. A solenoid valve is arranged at one section of the drain pipe 12, and the drain pipe 12 is connected to the external desulfurization liquid treatment system..

[0038] The cleaned flue gas is discharged from the top of the exhaust pipe 11, while the desulfurization liquid collected in the tower body 10 is discharged through the drain pipe 12 to the external desulfurization liquid treatment system for treatment.

[0039] Working principle: The flue gas enters the diffusion cylinder 31 through the inlet pipe 20. The driving motor 36 operates to drive the rotating table 34 to rotate, and the connecting shaft 35 drives the closing plate 33 to rotate accordingly. During the displacement of the closing plate 33, multiple diffusion holes 32 are closed and opened, enabling the flue gas to enter the desulfurization liquid collected at the bottom of the tower body 10 from different positions of the diffusion holes 32. The impurities inside the flue gas are removed through the washing of the desulfurization liquid. Subsequently, the flue gas uniformly enters the spray area through the holes of the perforated plate 50. The external desulfurization liquid continuously flows from the spray pipe 41 to multiple nozzles 42, and the nozzles 42 atomize and spray the desulfurization liquid to treat the flue gas. The flue gas then contains a certain amount of desulfurization liquid water mist. The desulfurization liquid water mist in the flue gas is removed through dehydration by the cyclone plate dehydrator 60. The purified flue gas is discharged from the exhaust pipe 11 along the air flow, while the removed desulfurization liquid water mist is thrown by the cyclone plate dehydrator 60 towards the surface of the pipe wall and flows to the spray area, and jointly collects with the desulfurization liquid in the spray area at the bottom of the tower body 10 to remove impurities from the flue gas.

[0040] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it.

Claims

1. Boiler flue gas purification device, including: A tower body (10) and an air intake pipe (20), characterized in that a diffusion component (30) is provided at the end of the air intake pipe (20), the diffusion component (30) is located in the desulfurization liquid collected at the bottom of the tower body (10), the diffusion component (30) includes a diffusion cylinder (31) and a drive motor (36), a plurality of diffusion holes (32) are provided on the surface of the diffusion cylinder (31), a rotating table (34) connected to the output end of the drive motor (36) is rotatably plugged inside the diffusion cylinder (31), a plurality of connecting shafts (35) are provided on the outside of the rotating table (34), and a closing plate (33) is provided at one end of the connecting shaft (35).

2. The boiler flue gas purification device according to claim 1, characterized in that: It also includes a spray assembly, which is composed of a spray pipe (41) and a plurality of spray heads (42). The spray heads (42) atomize the desulfurization liquid and spray it into the interior of the tower body (10).

3. The boiler flue gas purification device according to claim 2, characterized in that: A perforated plate (50) is provided at the bottom of the spray assembly, and the outer side of the perforated plate (50) is fixedly connected to the inner wall of the tower body (10).

4. The boiler flue gas purification device according to claim 2, characterized in that: A cyclone plate dehydrator (60) is arranged on the top of the spray assembly, and the cyclone plate dehydrator (60) is sealed with the inner wall surface of the tower body (10).

5. The boiler flue gas purification device according to claim 1, characterized in that: An exhaust pipe (11) is provided at the top of the tower body (10), and the exhaust pipe (11) is used to discharge purified smoke.

6. The boiler flue gas purification device according to claim 1, characterized in that: A liquid discharge pipe (12) is provided at the bottom of the tower body (10), a section of the liquid discharge pipe (12) is provided with a solenoid valve, and the liquid discharge pipe (12) is connected to an external desulfurization liquid treatment system.

7. The boiler flue gas purification device according to claim 1, characterized in that: The closing plate (33) is arranged in an arc shape, and the closing plate (33) matches the diffusion tube (31).

8. The boiler flue gas purification device according to claim 1, characterized in that: A rubber layer is provided on the surface of the closing plate (33), and the closing plate (33) is bonded to the inner wall of the diffusion cylinder (31) via the rubber layer.

9. The boiler flue gas purification device according to claim 1, characterized in that: The driving motor (36) is located at the top of the desulfurization liquid level, and the surface of the driving motor (36) is coated with an anti-corrosion coating.

10. The boiler flue gas purification device according to claim 1, characterized in that: The plurality of connecting shafts (35) are equidistantly arranged in the circumferential direction relative to the center of the rotating platform, and the connecting shafts (35) are detachably mounted on the surface of the rotating platform (34).

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