Novel anti-scaling flushing device for inlet of absorption tower

Abstract

The novel anti-scaling flushing device comprises an absorption tower body, the left side of the lower portion of the absorption tower body is communicated with an air inlet pipeline, and two sealing shells are welded to the end, close to the absorption tower body, of the air inlet pipeline; according to the utility model, the upper air cylinder of the sealing shell is started to extend, so that the upper air cylinder pushes the flushing pipe to move downwards, the plurality of double-head nozzles on the surface of the flushing pipe extend to the inner side of the air inlet pipeline, and the sealing blocks on the surfaces of the double-head nozzles keep the sealing performance with the air inlet pipeline; when the upper air cylinder retracts to drive the double-end nozzles to be separated from the air inlet pipeline, the side air cylinder is started to push the plugging plate to be connected with a notch of the notch plate in an inserted mode, and sealing of the air inlet pipeline is maintained; and the double-end nozzle cleaning effect of the flushing pipe is achieved through the maintenance opening of the sealing shell.

Description

Technical Field

[0001] The utility model relates to the technical field of flue cleaning, in particular to a novel anti-scaling flushing device for an absorption tower inlet. Background Art

[0002] The core equipment of wet limestone flue gas desulfurization process - absorption tower, the unsaturated flue gas containing SO2 discharged after boiler combustion enters the absorption tower through the original flue, and after passing through the turbulator, spray desulfurization, demister dust removal and water removal in the absorption tower, the qualified flue gas is discharged into the atmosphere through the chimney. At the interface between the flue and the inlet of the absorption tower, the flue gas contacts the circulating spray slurry to form a dry-wet interface area. The temperature of the source flue gas at the inlet of the absorption tower is usually between 90 and 110 ° C. When the original flue gas is transferred from a dry environment to a humid environment, the circulating slurry containing limestone and gypsum is rapidly evaporated and dehydrated at the inlet flue and tower wall of the absorption tower under the action of high-temperature flue gas, and solid deposits (commonly known as scaling) are easily formed. In addition, when the SO2 and O2 content in the original flue gas is high, the calcium sulfite in the precipitate is oxidized more thoroughly to form gypsum. Gypsum and other scaling are continuously accumulated at the dry-wet interface to form extremely hard solid deposits, causing blockage. When the blockage at the dry-wet interface intensifies, the pressure difference in the absorption tower increases and the flue gas circulation is blocked, causing the main equipment of the boiler to be forced to shut down, resulting in loss of power generation.

[0003] After searching, application number CN202221393425.X discloses an absorption tower slurry circulation device, in which a spray layer is provided at the upper part of the absorption tower, and a slurry outlet is provided at the bottom of the absorption tower. The absorption tower slurry circulation device includes a first valve, a slurry circulation pump and a second valve connected in sequence, the inlet of the first valve is connected to the slurry outlet, and the outlet of the second valve is connected to the spray layer; a filter structure is provided on the slurry pipeline between the slurry circulation pump and the second valve, and a flushing pipeline is connected to the slurry pipeline between the filter structure and the second valve, and a flushing valve is provided on the flushing pipeline. The absorption tower slurry circulation device of the utility model can effectively isolate the wet flue gas from the slurry carried by the absorption tower, and can be repaired while ensuring personal safety and the safe and stable operation of the desulfurization system; it can prevent the backflow of flue gas and absorption tower slurry during online flushing and maintenance of the filter.

[0004] The existing anti-scaling flushing device for the inlet of the absorption tower, as described in the above-mentioned utility model, often adopts a built-in flushing pipe, and uses the nozzle on the flushing pipe to realize the flushing operation at the dry-wet interface of the inlet of the absorption tower. Since the flushing pipe adopts a fixed installation method, the nozzle exposed at the dry-wet interface of the inlet of the absorption tower adds an attachment structure for scaling. During the long-term use stage, the nozzle of the flushing device is prone to clogging, which is not conducive to the anti-scaling flushing operation of the inlet of the absorption tower.

[0005] To this end, a novel anti-scaling flushing device for the inlet of an absorption tower is proposed, which has the advantages of easy flushing at the dry-wet interface and nozzle cleaning, thereby solving the problems in the above-mentioned background technology. Utility Model Content

[0006] The utility model aims to solve the shortcomings in the prior art and proposes a novel anti-scaling flushing device for the inlet of an absorption tower.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a novel anti-scaling flushing device for the inlet of an absorption tower, comprising an absorption tower body, an air intake pipe is connected to the left side of the lower part of the absorption tower body, and two sealing shells are welded to one end of the air intake pipe close to the absorption tower body, each of the sealing shells is interspersed with a flushing pipe, and the surfaces of the two flushing pipes are provided with telescopic hoses, and the two flushing pipes are connected to the circulation pipe through a tee, the top surface of the flushing pipe is welded with a T-shaped mounting seat, and the bottom surface of the flushing pipe is equidistantly installed with a plurality of double-headed Nozzle, one end of each of the double-headed nozzles extends to the inner side of the air intake pipe, and a sealing block is sleeved on the upper surface of each double-headed nozzle and installed against the outer wall of the air intake pipe, an upper cylinder is fixed to the top of the sealing shell, and one end of the upper cylinder is fixedly connected to the T-shaped mounting seat of the flushing pipe by screws, a maintenance port is provided on the side wall of the sealing shell, and a sealing plate is slidably installed on the periphery of the maintenance port, a side cylinder is fixed to the outer wall of the air intake pipe, and one end of the side cylinder is provided with a sealing plate that is interlaced and connected with the sealing shell, and a notch plate is welded on the inner wall of the sealing shell corresponding to the sealing plate.

[0008] As a further description of the above technical solution: the side wall of the sealing shell is welded with a vertical rod through a connecting column, and the surface of the vertical rod is sleeved with a guide sleeve welded to a sealing plate, and a rubber sealing pad is pasted on the side of the sealing plate facing the maintenance port.

[0009] As a further description of the above technical solution: the multiple double-headed nozzles of the flushing pipe are all arranged in a Y-shaped structure, and the outer wall of the air inlet pipe is provided with multiple make-shift openings corresponding to the double-headed nozzles.

[0010] As a further description of the above technical solution: a U-shaped notch is provided at one end of the notch plate facing the blocking plate.

[0011] As a further description of the above technical solution: one end of the air inlet pipe away from the absorption tower body is fixedly connected with a flange with a circular structure.

[0012] As a further description of the above technical solution: one end of the circulation pipe away from the flushing pipe is connected to the slurry confluence cavity at the bottom of the absorption tower body, and a booster pump is installed on the surface of the circulation pipe.

[0013] The utility model has the following beneficial effects:

[0014] In the utility model, by starting the upper cylinder of the sealing shell to extend, the upper cylinder pushes the flushing pipe downward, so that the multiple double-headed nozzles on the surface of the flushing pipe are extended to the inside of the air intake pipe, and the sealing blocks on the surface of the double-headed nozzles maintain the sealing with the air intake pipe, so that the slurry sprayed from the multiple double-headed nozzles can flush the dry and wet joint surface of the absorption tower inlet. When the upper cylinder retracts to drive the double-headed nozzle out of the air intake pipe, the side cylinder is started to push the sealing plate and the notch of the notch plate to be plugged together, so as to maintain the sealing of the air intake pipe, and the maintenance port of the sealing shell can achieve the effect of cleaning the double-headed nozzle of the flushing pipe. Compared with the prior art, a flushing pipe that can be raised and lowered is adopted, which is easy to clean the double-headed nozzle on the flushing pipe, and avoids the situation where scaling of the double-headed nozzle hinders the implementation of subsequent flushing operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of a novel anti-scaling flushing device for the inlet of an absorption tower according to the utility model;

[0016] Figure 2 This is a schematic diagram of the air inlet pipeline structure of a novel anti-scaling flushing device for the absorption tower inlet of the utility model;

[0017] Figure 3 for Figure 1 A magnified view of the structure.

[0018] Legend:

[0019] 1. Absorption tower body; 2. Air inlet pipe; 3. Sealing shell; 4. Flushing pipe; 5. Upper cylinder; 6. T-type mounting seat; 7. Notch plate; 8. Double-head nozzle; 9. Side cylinder; 10. Sealing plate; 11. Circulation pipe; 12. Telescopic hose; 13. Flange; 14. Sealing block; 15. Maintenance port; 16. Sealing plate; 17. Vertical rod; 18. Guide sleeve. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0021] According to an embodiment of the utility model, a novel anti-scaling flushing device for an absorption tower inlet is provided.

[0022] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 1-3As shown, a novel anti-scaling flushing device for the inlet of an absorption tower according to an embodiment of the utility model comprises an absorption tower body 1, an air intake pipe 2 is connected to the left side of the lower part of the absorption tower body 1, and two sealing shells 3 are welded to one end of the air intake pipe 2 close to the absorption tower body 1, a flushing pipe 4 is inserted in each sealing shell 3, and a telescopic hose 12 is arranged on the surface of the two flushing pipes 4, and the two flushing pipes 4 are connected to the circulation pipe 11 through a tee, a T-shaped mounting seat 6 is welded on the top surface of the flushing pipe 4, and a plurality of double-headed nozzles 8 are equidistantly installed on the bottom surface of the flushing pipe 4, one end of each double-headed nozzle 8 extends to the inner side of the air intake pipe 2, and a sealing block 14 is installed on the upper surface of each double-headed nozzle 8 and is mounted against the outer wall of the air intake pipe 2, an upper cylinder 5 is fixed on the top of the sealing shell 3, and one end of the upper cylinder 5 is fixed to the T-shaped mounting seat 6 of the flushing pipe 4 by screws. The sealing shell 3 is connected, a maintenance port 15 is provided on the side wall of the sealing shell 3, and a sealing plate 16 is slidably installed on the periphery of the maintenance port 15, a side cylinder 9 is fixed on the outer wall of the air inlet pipe 2, and a sealing plate 10 which is interlaced and connected with the sealing shell 3 is provided at one end of the side cylinder 9, and a notch plate 7 is welded on the inner wall of the sealing shell 3 corresponding to the sealing plate 10, the control mode of the upper cylinder 5 and the side cylinder 9 of the utility model is controlled by manually starting and closing the switch, the wiring diagram of the power element and the provision of power supply belong to the common knowledge in the field, and the utility model is mainly used to protect mechanical devices, so the utility model does not explain the control mode and wiring arrangement in detail, the upper cylinder 5 and the side cylinder 9 are both provided with an air source to facilitate the extension and retraction of the upper cylinder 5 and the side cylinder 9, and the double-headed nozzle 8 with a Y-shaped structure can be used to synchronously flush the left and right sides of the dry-wet junction surface at the inlet of the absorption tower, which is conducive to increasing the flushing range and effect;

[0023] In one embodiment, a vertical rod 17 is welded to the side wall of the sealing shell 3 through a connecting column, and a guide sleeve 18 welded to the sealing plate 16 is installed on the surface of the vertical rod 17. A rubber sealing pad is pasted on the side of the sealing plate 16 facing the maintenance port 15. By pulling the sealing plate 16 connected to the outer wall of the sealing shell 3, the guide sleeve 18 of the sealing plate 16 slides with the vertical rod 17 until the maintenance port 15 is exposed, and the maintenance personnel cleans the double-headed nozzle 8 of the flushing pipe 4 through the maintenance port 15.

[0024] In one embodiment, the multiple double-ended nozzles 8 of the flushing pipe 4 are arranged in a Y-shaped structure, and the outer wall of the air intake pipe 2 is provided with multiple clearance openings corresponding to the double-ended nozzles 8. The setting of the clearance openings makes it easy for the double-ended nozzles 8 to extend into the interior of the air intake pipe 2, and the clearance openings are sealed by the sealing block 14.

[0025] In one embodiment, a U-shaped notch is provided at one end of the notch plate 7 facing the sealing plate 10. By setting the notch plate 7, the length of the sealing plate 10 can be compensated, so that the notch plate 7 and the sealing plate 10 form a sealing structure when combined, thereby preventing the sulfur-containing exhaust gas inside the intake pipe 2 from entering the sealing shell 3.

[0026] In one embodiment, a flange 13 of a circular structure is fixedly connected to one end of the air inlet pipe 2 away from the absorption tower body 1. The flange 13 is arranged so as to be connected to the sulfur-containing waste gas conveying pipe, thereby facilitating the conveying of the sulfur-containing waste gas.

[0027] In one embodiment, one end of the circulation pipe 11 away from the flushing pipe 4 is connected to the slurry confluence chamber at the bottom of the absorption tower body 1, and a booster pump is installed on the surface of the circulation pipe 11. The booster pump is set to pump the filtered slurry into the circulation pipe 11 again, and the flushing pipe 4 flushes the dry and wet interface at the absorption tower inlet to prevent scaling.

[0028] Working principle:

[0029] When in use, the sulfur-containing waste gas enters the absorption tower body 1 through the air intake pipe 2, so that the sulfur-containing waste gas contacts and is absorbed by the slurry circulating and spraying inside the absorption tower body 1. When flushing the dry-wet interface at the entrance of the absorption tower, the upper cylinder 5 of the sealing shell 3 is started to extend, so that the upper cylinder 5 pushes the flushing pipe 4 downward, so that the multiple double-headed nozzles 8 on the surface of the flushing pipe 4 are extended to the inside of the air intake pipe 2, and the sealing blocks 14 on the surface of the double-headed nozzles 8 maintain the sealing with the air intake pipe 2. Then, the circulation pipe 11, under the action of the booster pump, pumps the slurry at the bottom of the absorption tower body 1 into the two flushing pipes 4, and is sprayed out by the multiple double-headed nozzles 8, so that the multiple double-headed nozzles 8 can be effectively prevented from leaking. The slurry sprayed from the head nozzle 8 is used to flush the dry and wet interface at the entrance of the absorption tower. When it is necessary to clean the flushing pipe 4 and the double-headed nozzle 8, the upper cylinder 5 is started to retract. When the upper cylinder 5 retracts and drives the double-headed nozzle 8 to detach from the air intake pipe 2, the side cylinder 9 is started to push the sealing plate 10 to plug into the notch of the notch plate 7 to maintain the sealing of the air intake pipe 2, and then the sealing plate 16 connected to the outer wall of the sealing shell 3 is pulled to make the guide sleeve 18 of the sealing plate 16 slide with the vertical rod 17 until the maintenance port 15 is exposed. The maintenance personnel cleans the double-headed nozzle 8 of the flushing pipe 4 through the maintenance port 15. This process does not affect the absorption and treatment of sulfur-containing waste gas by the absorption tower.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel anti-scaling flushing device for an absorption tower inlet, comprising an absorption tower body (1), characterized in that: The lower left side of the absorption tower body (1) is connected to an air intake pipe (2), and two sealing shells (3) are welded to one end of the air intake pipe (2) close to the absorption tower body (1), and a flushing pipe (4) is inserted into each of the sealing shells (3), and a telescopic hose (12) is arranged on the surface of the two flushing pipes (4), and the two flushing pipes (4) are connected to the circulation pipe (11) through a tee, and a T-shaped mounting seat (6) is welded to the top surface of the flushing pipe (4), and a plurality of double-headed nozzles (8) are equidistantly installed on the bottom surface of the flushing pipe (4), and one end of each of the double-headed nozzles (8) extends to the inner side of the air intake pipe (2), and each double-headed nozzle (8) has a plurality of double-headed nozzles (8) arranged on the bottom surface of the flushing pipe (4). (8) A sealing block (14) is sleeved on the upper surface and mounted against the outer wall of the air intake pipe (2); an upper cylinder (5) is fixed on the top of the sealing shell (3), and one end of the upper cylinder (5) is fixedly connected to the T-shaped mounting seat (6) of the flushing pipe (4) by screws; a maintenance port (15) is provided on the side wall of the sealing shell (3), and a sealing plate (16) is slidably mounted on the periphery of the maintenance port (15); a side cylinder (9) is fixed on the outer wall of the air intake pipe (2), and one end of the side cylinder (9) is provided with a sealing plate (10) that is interlaced and connected with the sealing shell (3); and a notch plate (7) is welded to the inner wall of the sealing shell (3) corresponding to the sealing plate (10).

2. A novel anti-scaling flushing device for the inlet of an absorption tower according to claim 1, characterized in that: A vertical rod (17) is welded to the side wall of the sealing shell (3) via a connecting column, and a guide sleeve (18) welded to the sealing plate (16) is sleeved on the surface of the vertical rod (17), and a rubber sealing pad is pasted on the side of the sealing plate (16) facing the maintenance port (15).

3. A novel anti-scaling flushing device for the inlet of an absorption tower according to claim 1, characterized in that: The plurality of double-ended nozzles (8) of the flushing pipe (4) are all arranged in a Y-shaped structure, and the outer wall surface of the air intake pipe (2) is provided with a plurality of clearance openings corresponding to the double-ended nozzles (8).

4. A novel anti-scaling flushing device for the inlet of an absorption tower according to claim 1, characterized in that: A U-shaped notch is formed at one end of the notch plate (7) facing the blocking plate (10).

5. A novel anti-scaling flushing device for the inlet of an absorption tower according to claim 1, characterized in that: One end of the air inlet pipe (2) away from the absorption tower body (1) is fixedly connected with a flange (13) of a circular structure.

6. A novel anti-scaling flushing device for the inlet of an absorption tower according to claim 1, characterized in that: One end of the circulation pipe (11) away from the flushing pipe (4) is connected to the slurry confluence cavity at the bottom of the absorption tower body (1), and a booster pump is installed on the surface of the circulation pipe (11).

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