Double-tower double-circulation desulfurization device for high-SO2-concentration flue gas

Abstract

The utility model relates to the technical field of circulating desulfurization, in particular to a double-tower double-circulation desulfurization device for high-SO2-concentration flue gas, which comprises a workbench, a first-stage circulating absorption tower and a second-stage circulating absorption tower are arranged above the workbench, and a flue gas transmission pipeline is arranged between the first-stage circulating absorption tower and the second-stage circulating absorption tower. The primary circulating absorption tower is provided with a raw smoke inlet pipe, a first oxidation spray gun, a first stirrer and a first atomization spraying layer, the secondary circulating absorption tower is provided with a gas outlet pipe, a second oxidation spray gun, a second stirrer and a second atomization spraying layer, and the primary circulating absorption tower is provided with a first moving wheel and a first holding handle; a second moving wheel and a second holding handle are arranged on the secondary circulating absorption tower; and a first reinforcing rib and a second reinforcing rib are arranged on the smoke transmission pipeline. The blockage condition caused by accumulation of a large amount of secondary flue gas in the bent flue gas conveying pipeline is avoided, and the structural connection stability between the two ends of the flue gas conveying pipeline and the primary circulating absorption tower and the secondary circulating absorption tower is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cyclic desulfurization, in particular to a double-tower double-circulation desulfurization device for flue gas with high SO2 concentration. Background Art

[0002] In industrial production processes, such as power generation, steel smelting, chemical industry and other industries, a large amount of high SO2 concentration flue gas will be generated. High SO2 concentration flue gas is a gas with a slightly yellow color and a pungent odor.

[0003] The high SO2 concentration flue gas emitted has certain hazards to the environment and human health. The high SO2 concentration flue gas is an acidic gas, which will react with water vapor in the atmosphere to generate sulfurous acid, which will be further oxidized to generate sulfuric acid, forming acid rain, which will corrode the soil, water bodies, forests, buildings, etc. Therefore, the high SO2 concentration flue gas emitted needs to be purified, so a double-tower double-circulation desulfurization device is needed.

[0004] Publication No. CN207980852U discloses a double-tower double-circulation desulfurization device for flue gas with high SO2 concentration, including a primary circulation absorption tower and a secondary circulation absorption tower. The top of the primary circulation absorption tower is provided with a smoke transmission pipeline connected to the middle of the secondary circulation absorption tower. The middle of the primary circulation absorption tower is provided with a raw smoke inlet pipe, and the top of the secondary circulation absorption tower is provided with a clean smoke outlet pipe. The first ridge-type demister, the first atomizing spray layer and the first slurry pool are arranged in the first atomizing spray layer. A plurality of first atomizing nozzles are evenly installed on the first atomizing spray pipe, and the original smoke inlet pipe is located above the first slurry pool. The interior of the secondary circulation absorption tower is provided with a second ridge-type demister, a second atomizing spray layer, a smoke uniform distribution guide plate and a second slurry pool from top to bottom. The smoke uniform distribution guide plate is located above the outlet of the smoke transmission pipe. A plurality of second atomizing spray pipes are arranged in the second atomizing spray layer. A plurality of second atomizing nozzles are evenly installed on the second atomizing spray pipe. A plurality of smoke escape prevention rings are arranged on the inner wall of the second atomizing spray layer between the second atomizing spray pipes.

[0005] At present, the existing double-tower double-circulation desulfurization devices for high SO2 concentration flue gas, the distance between the primary circulation absorption tower and the secondary circulation absorption tower is mostly unable to be adjusted, which will cause a large amount of secondary flue gas to accumulate in the bent smoke transmission duct, thereby causing the smoke transmission duct to be blocked, reducing the effect of the secondary circulation absorption tower on the secondary flue gas purification and desulfurization cycle.

[0006] In addition, the existing double-tower double-circulation desulfurization device for high SO2 concentration flue gas has a low structural connection stability between the two ends of the smoke transmission pipe and the primary circulation absorption tower and the secondary circulation absorption tower, and the two ends of the smoke transmission pipe are easy to slip off the primary circulation absorption tower and the secondary circulation absorption tower respectively.

[0007] The above problems are widespread and urgently need to be improved. Utility Model Content

[0008] The purpose of the utility model is to solve the above-mentioned shortcomings in the prior art and to propose a double-tower double-circulation desulfurization device for flue gas with high SO2 concentration.

[0009] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0010] A double-tower double-circulation desulfurization device for high SO2 concentration flue gas is designed, including a workbench, a primary circulation absorption tower and a secondary circulation absorption tower are arranged above the workbench, a smoke transmission duct is arranged between the primary circulation absorption tower and the secondary circulation absorption tower, the primary circulation absorption tower is provided with a raw smoke inlet pipe, a first oxidation spray gun, a first stirrer, and a first atomizing spray layer, the secondary circulation absorption tower is provided with an outlet pipe, a second oxidation spray gun, a second stirrer, and a second atomizing spray layer, the primary circulation absorption tower is provided with a first moving wheel and a first gripping handle, the secondary circulation absorption tower is provided with a second moving wheel and a second gripping handle, and the smoke transmission duct is provided with a first reinforcing rib and a second reinforcing rib.

[0011] Furthermore, the number of the first moving wheels is four, and the four first moving wheels are symmetrically arranged at the lower end of the primary circulation absorption tower.

[0012] Furthermore, the number of the second moving wheels is four, and the four second moving wheels are symmetrically arranged at the lower end of the secondary circulation absorption tower.

[0013] Furthermore, the smoke transmission pipe is a Z-shaped structure as a whole, the upper left end of the smoke transmission pipe is connected to the primary circulation absorption tower, the lower right end of the smoke transmission pipe is connected to the secondary circulation absorption tower, and the transverse pipe body of the smoke transmission pipe is made of metal corrugated pipe.

[0014] Furthermore, the first gripping handle and the second gripping handle are both symmetrically arranged, the first gripping handle is arranged at the front end of the primary circulation absorption tower, and the second gripping handle is arranged at the front end of the secondary circulation absorption tower, and the side sections of the first gripping handle and the second gripping handle are both U-shaped structures.

[0015] Furthermore, massage protrusions are provided on the inner wall surfaces of the first gripping handle and the second gripping handle, and the massage protrusions are in a trapezoidal structure as a whole, and arc-shaped surfaces are provided on the massage protrusions.

[0016] Furthermore, the first reinforcing rib is arranged between the smoke transmission duct and the primary circulation absorption tower, and the second reinforcing rib is arranged between the smoke transmission duct and the secondary circulation absorption tower, and the cross-sections of the first reinforcing rib and the second reinforcing rib are both triangular structures.

[0017] The utility model proposes a double-tower double-circulation desulfurization device for flue gas with high SO2 concentration, which has the following beneficial effects:

[0018] 1. The utility model provides a first moving wheel and a first holding handle structure, a second moving wheel and a second holding handle structure, and a smoke transmission pipe with a bellows structure, so that the distance between the primary circulation absorption tower and the secondary circulation absorption tower can be increased and adjusted according to a large amount of secondary flue gas in the smoke transmission pipe, thereby achieving the overall lateral extension of the smoke transmission pipe, avoiding the accumulation of a large amount of secondary flue gas in the bent smoke transmission pipe and causing blockage, thereby ensuring the effect of the later secondary circulation absorption tower on the secondary flue gas purification and desulfurization cycle.

[0019] 2. The utility model improves the structural stability of the two ends of the smoke transmission duct and the primary circulation absorption tower and the secondary circulation absorption tower by respectively arranging the first reinforcement rib and the second reinforcement rib at the two ends of the smoke transmission duct, thereby effectively preventing the two ends of the smoke transmission duct from slipping off the primary circulation absorption tower and the secondary circulation absorption tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a first-view stereoscopic diagram of the overall structure of the utility model;

[0021] Figure 2 It is a schematic side view of the overall structure of the utility model;

[0022] Figure 3 It is a stereoscopic diagram of the overall structure of the utility model from a second viewing angle;

[0023] Figure 4 For the utility model Figure 1 A partial enlarged view of the middle part;

[0024] Figure 5 For the utility model Figure 1 A partial enlarged view of point B in the middle;

[0025] Figure 6 It is a front cross-sectional schematic diagram of the overall structure of the utility model.

[0026] In the figure: 1 workbench; 2 primary circulation absorption tower; 21 raw smoke inlet pipe; 22 first oxidation spray gun; 23 first stirrer; 24 first atomizing spray layer; 3 secondary circulation absorption tower; 31 exhaust pipe; 32 second oxidation spray gun; 33 second stirrer; 34 second atomizing spray layer; 4 smoke transmission pipe; 41 first reinforcing rib; 42 second reinforcing rib; 5 first moving wheel; 6 first gripping handle; 7 second moving wheel; 8 second gripping handle; 9 massage protrusion; 91 arc surface. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0028] Reference Figure 1-6 A double-tower double-circulation desulfurization device for high SO2 concentration flue gas comprises a workbench 1, a primary circulation absorption tower 2 and a secondary circulation absorption tower 3 are arranged above the workbench 1, a smoke transmission pipeline 4 is arranged between the primary circulation absorption tower 2 and the secondary circulation absorption tower 3, the primary circulation absorption tower 2 is provided with a raw smoke inlet pipe 21, a first oxidation spray gun 22, a first stirrer 23, and a first atomizing spray layer 24, and the secondary circulation absorption tower 3 is provided with an outlet pipe 31, a second oxidation spray gun 32, a second stirrer 33, a second atomizing spray layer 24, and a second circulation absorption tower 3 is provided with ... The primary circulation absorption tower 2 is provided with a first moving wheel 5 and a first holding handle 6, the secondary circulation absorption tower 3 is provided with a second moving wheel 7 and a second holding handle 8, the smoke transmission duct 4 is provided with a first reinforcing rib 41 and a second reinforcing rib 42, the primary circulation absorption tower 2 and the secondary circulation absorption tower 3 are both double-tower double-circulation desulfurization devices, and the related structures thereon are all prior arts, and the related structures in the publication number CN207980852U can be referred to. Some existing structures are not drawn and marked, and there is no need to repeat them.

[0029] There are four first moving wheels 5 , which are symmetrically arranged at the lower end of the primary circulation absorption tower 2 .

[0030] There are four second moving wheels 7, which are symmetrically arranged at the lower end of the secondary circulation absorption tower 3. The first moving wheel 5 and the second moving wheel 7 have a braking function. At the same time, both the first moving wheel 5 and the second moving wheel 7 are transverse guide wheels and can only perform transverse translation.

[0031] The smoke transmission duct 4 is a Z-shaped structure as a whole. The upper left end of the smoke transmission duct 4 is connected to the primary circulation absorption tower 2, and the lower right end of the smoke transmission duct 4 is connected to the secondary circulation absorption tower 3. The transverse tube body of the smoke transmission duct 4 is made of metal corrugated tube material, which can realize the transverse stable expansion and contraction deformation of the transverse tube body of the smoke transmission duct 4.

[0032] The first gripping handle 6 and the second gripping handle 8 are both symmetrically arranged. The first gripping handle 6 is arranged at the front end of the primary circulation absorption tower 2, and the second gripping handle 8 is arranged at the front end of the secondary circulation absorption tower 3. The side sections of the first gripping handle 6 and the second gripping handle 8 are both U-shaped structures. Combined with the first moving wheel 5 and the second moving wheel 7, it is convenient to hold the first gripping handle 6 and the second gripping handle 8 with both hands at the same time and move the primary circulation absorption tower 2 and the secondary circulation absorption tower 3 horizontally at the same time, thereby improving the efficiency of the spacing adjustment.

[0033] The inner wall surfaces of the first gripping handle 6 and the second gripping handle 8 are provided with massage protrusions 9. The massage protrusions 9 are trapezoidal in structure as a whole. An arc-shaped surface 91 is provided on the massage protrusions 9. The trapezoidal structure has strong stability. The massage protrusions 9 are made of highly elastic polyurethane rubber material and combined with the arc-shaped surface 91, which improves the comfort of holding the first gripping handle 6 and the second gripping handle 8 as a whole.

[0034] The first reinforcing rib 41 is arranged between the smoke conveying duct 4 and the primary circulation absorption tower 2, and the second reinforcing rib 42 is arranged between the smoke conveying duct 4 and the secondary circulation absorption tower 3. The cross-sections of the first reinforcing rib 41 and the second reinforcing rib 42 are both triangular structures. The first reinforcing rib 41 and the second reinforcing rib 42 are both made of cemented carbide tungsten steel material, which has high strength and does not deform. Combined with the stability of the triangular structure, the structural connection stability between the two ends of the smoke conveying duct 4 and the primary circulation absorption tower 2 and the secondary circulation absorption tower 3 is improved.

[0035] Working method: The flue gas with high SO2 concentration is input into the primary circulation absorption tower 2 through the raw flue gas inlet pipe 21. The flue gas with high SO2 concentration flows from bottom to top and undergoes gas-liquid contact reaction with the limestone slurry in the primary circulation absorption tower 2. The slurry after the reaction falls into the bottom of the primary circulation absorption tower 2 and is oxidized by the first oxidation spray gun 22 that is started at the same time, so that the calcium sulfite in the slurry can be oxidized into non-toxic gypsum. Then, a large amount of secondary flue gas formed after the reaction passes upward through the smoke transmission pipe 4 into the secondary circulation absorption tower 3 to undergo secondary limestone slurry gas-liquid contact reaction purification. Finally, the clean gas formed by the secondary purification reaction will be discharged through the outlet pipe 31. This is a prior art, and the relevant contents in the publication number CN207980852U can be referred to.

[0036] If there is a large amount of secondary flue gas in the current smoke transmission pipe 4, the brakes of the first moving wheel 5 and the second moving wheel 7 can be released at this time, and then the first holding handle 6 and the second holding handle 8 can be held and the primary circulation absorption tower 2 and the secondary circulation absorption tower 3 can be moved horizontally to both sides. At this time, the transverse corrugated tube body of the smoke transmission pipe 4 is stretched horizontally, and when the distance between the primary circulation absorption tower 2 and the secondary circulation absorption tower 3 is increased to a suitable smoke transmission and circulation effect, the first moving wheel 5 and the second moving wheel 7 can be braked to avoid a large amount of secondary flue gas from accumulating in the bent smoke transmission pipe 4 and causing blockage, thereby ensuring the effect of the secondary circulation absorption tower 3 on the secondary flue gas purification and desulfurization cycle in the later stage.

[0037] In addition, by respectively arranging the first reinforcing rib 41 and the second reinforcing rib 42 at the two ends of the smoke transmission duct 4, the structural connection stability between the two ends of the smoke transmission duct 4 and the primary circulation absorption tower 2 and the secondary circulation absorption tower 3 is improved, and the two ends of the smoke transmission duct 4 are effectively prevented from slipping off the primary circulation absorption tower 2 and the secondary circulation absorption tower 3.

[0038] 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 within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A double-tower double-circulation desulfurization device for flue gas with high SO2 concentration, comprising a workbench (1), characterized in that: A primary circulation absorption tower (2) and a secondary circulation absorption tower (3) are arranged above the workbench (1); a smoke transmission pipe (4) is arranged between the primary circulation absorption tower (2) and the secondary circulation absorption tower (3); the primary circulation absorption tower (2) is provided with a raw smoke air inlet pipe (21), a first oxidation spray gun (22), a first stirrer (23), and a first atomizing spray layer (24); the secondary circulation absorption tower (3) is provided with an air outlet pipe (31), a second oxidation spray gun (32), a second stirrer (33), and a second atomizing spray layer (34); the primary circulation absorption tower (2) is provided with a first moving wheel (5) and a first gripping handle (6); the secondary circulation absorption tower (3) is provided with a second moving wheel (7) and a second gripping handle (8); and the smoke transmission pipe (4) is provided with a first reinforcing rib (41) and a second reinforcing rib (42).

2. A double-tower double-circulation desulfurization device for high SO2 concentration flue gas according to claim 1, characterized in that: The number of the first moving wheels (5) is four, and the four first moving wheels (5) are symmetrically arranged at the lower end of the primary circulation absorption tower (2).

3. A double-tower double-circulation desulfurization device for high SO2 concentration flue gas according to claim 1, characterized in that: The number of the second moving wheels (7) is four, and the four second moving wheels (7) are symmetrically arranged at the lower end of the secondary circulation absorption tower (3).

4. A double-tower double-circulation desulfurization device for high SO2 concentration flue gas according to claim 1, characterized in that: The smoke transmission pipe (4) is of a Z-shaped structure as a whole. The upper left end of the smoke transmission pipe (4) is connected to the primary circulation absorption tower (2), and the lower right end of the smoke transmission pipe (4) is connected to the secondary circulation absorption tower (3). The transverse pipe body of the smoke transmission pipe (4) is made of a metal corrugated pipe.

5. A double-tower double-circulation desulfurization device for high SO2 concentration flue gas according to claim 1, characterized in that: The first gripping handle (6) and the second gripping handle (8) are both symmetrically arranged. The first gripping handle (6) is arranged at the front end of the primary circulation absorption tower (2), and the second gripping handle (8) is arranged at the front end of the secondary circulation absorption tower (3). The side cross-sections of the first gripping handle (6) and the second gripping handle (8) are both U-shaped structures.

6. A double-tower double-circulation desulfurization device for high SO2 concentration flue gas according to claim 5, characterized in that: The inner wall surfaces of the first gripping handle (6) and the second gripping handle (8) are provided with massage protrusions (9), the massage protrusions (9) are of a trapezoidal structure as a whole, and the massage protrusions (9) are provided with arc-shaped surfaces (91).

7. A double-tower double-circulation desulfurization device for high SO2 concentration flue gas according to claim 1, characterized in that: The first reinforcing rib (41) is arranged between the smoke transmission duct (4) and the primary circulation absorption tower (2), and the second reinforcing rib (42) is arranged between the smoke transmission duct (4) and the secondary circulation absorption tower (3), and the cross-sections of the first reinforcing rib (41) and the second reinforcing rib (42) are both triangular structures.

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