Device for preventing material accumulation at bottom of ammonia desulfurization tower

Abstract

The utility model discloses an ammonia desulfurization tower bottom material accumulation prevention device, and relates to the technical field of ammonia desulfurization. The desulfurization tower comprises a desulfurization tower wall, an anti-accumulation circulating pipeline is arranged on the outer side wall of the desulfurization tower wall, one end of the anti-accumulation circulating pipeline is provided with a pump outlet and an anti-accumulation pipeline main valve, and the other end of the anti-accumulation circulating pipeline is provided with a pipeline tail end exhaust valve. A first ammonium sulfate discharge pump and a second ammonium sulfate discharge pump are arranged on one side of the pump outlet anti-accumulation pipeline main valve; according to the utility model, slurry at the position where materials are easy to accumulate at the bottom of the desulfurizing tower can be forcibly circulated, the materials are prevented from accumulating at the bottom of the tower, and the bottom of the tower can be flushed and dissolved by utilizing the flushing water pipeline at the outlet of the ammonium sulfate discharge pump, so that the normal operation of circulation and oxidation air stirring in the tower is ensured, and the long-term safe and stable operation of an ammonia desulfurization system is realized; the operation oxidation air pressure and the current of an oxidation fan can be reduced, the power consumption of equipment in operation is saved, and the normal operation of the concentration circulating pump is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to ammonia desulfurization technical field, concretely is a kind of ammonia desulfurization tower bottom anti material accumulation device. BACKGROUND

[0002] During the operation of ammonia desulfurization in thermal power plant, local material accumulation problem can occur after long operation time of desulfurization tower bottom, which is mainly caused by uneven oxidation air and liquid force stirring, and poor flow and disturbance of slurry in the position far from suction inlet of concentration circulating pump and ammonium sulfate discharge pump during liquid level pulling and discharging process, which can easily cause local material accumulation.

[0003] However, this problem has not been completely solved in existing ammonia desulfurization process technology, which can cause local material accumulation in desulfurization tower bottom during long period operation of ammonia desulfurization, affect normal circulation of slurry in concentration section, and cause material accumulation area to expand for a long time, so that desulfurization system cannot operate normally, in addition, material accumulation in desulfurization tower bottom can cause oxidation pipe air hole to be blocked, oxidation fan outlet pressure to be high, oxidation stirring effect to be poor, and oxidation fan power consumption to be increased, so that the above-mentioned problems can be solved by the present application. SUMMARY

[0004] In order to solve the problem of local material accumulation in desulfurization tower bottom, affect normal circulation of slurry in concentration section, and cause desulfurization system to operate normally in existing ammonia desulfurization process technology, the purpose of the present application is to provide a kind of ammonia desulfurization tower bottom anti material accumulation device.

[0005] In order to solve the above technical problems, the utility model adopts the following technical scheme: a kind of ammonia desulfurization tower bottom anti material accumulation device, including desulfurization tower wall, the outer side wall of desulfurization tower wall is provided with anti material accumulation circulating pipeline, one end of anti material accumulation circulating pipeline is provided with pump outlet anti material accumulation pipeline total valve, the other end of anti material accumulation circulating pipeline is provided with pipeline end exhaust valve, the side of pump outlet anti material accumulation pipeline total valve is provided with first ammonium sulfate discharge pump and second ammonium sulfate discharge pump.

[0006] In one possible implementation, the side of the anti material accumulation circulating pipeline is provided with a first anti material accumulation circulating branch valve, a second anti material accumulation circulating branch valve, a third anti material accumulation circulating branch valve, a fourth anti material accumulation circulating branch valve and a fifth anti material accumulation circulating branch valve.

[0007] In a possible implementation manner, the side walls of the first anti-material-accumulation circulation branch valve, the second anti-material-accumulation circulation branch valve, the third anti-material-accumulation circulation branch valve, the fourth anti-material-accumulation circulation branch valve and the fifth anti-material-accumulation circulation branch valve are all provided with valve pipelines, one end of the valve pipeline extends into the anti-material-accumulation circulation pipeline, the other end of the valve pipeline extends into the desulfurization tower wall, and the valve pipeline is arranged along the tangent direction of the desulfurization tower wall.

[0008] In a possible implementation manner, the anti-material-accumulation circulation pipeline is in a ring shape, and the anti-material-accumulation circulation pipeline is arranged in a ring shape along the desulfurization tower wall.

[0009] In a possible implementation manner, the inner side wall of the desulfurization tower wall is fixedly connected with a support steel beam.

[0010] In a possible implementation manner, the inside of the desulfurization tower wall is provided with an oxidation air main pipe, the side wall of the oxidation air main pipe is fixedly connected with an oxidation air branch pipe, and the oxidation air main pipe and the oxidation air branch pipe are located in a staggered manner with the support steel beam.

[0011] In a possible implementation manner, one side of the first ammonium sulfate discharge pump and the second ammonium sulfate discharge pump is provided with a pump outlet de-swirler main valve.

[0012] Compared with the prior art, the utility model has the advantages of:

[0013] 1. The utility model discloses a forced circulation system for the desulfurization tower bottom, which can prevent material accumulation at the bottom of the desulfurization tower, can flush the tower bottom with the water pipeline connected to the outlet of the ammonium sulfate discharge pump, ensures the normal operation of the circulation pump and the oxidation air mixer, and realizes long-term safe and stable operation of the ammonia desulfurization system.

[0014] 2. The utility model can reduce the oxidation air pressure and the oxidation air fan current, save the equipment power consumption during operation, ensure the normal operation of the concentration circulation pump, solve the problem of material accumulation at the bottom of the desulfurization tower, make the disturbance of the slurry at the bottom of the desulfurization tower more uniform, make the suction of the slurry by the ammonium sulfate discharge pump more stable, and make the discharge of the ammonium sulfate after treatment more stable. DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0016] Fig. 1 It is a whole technological process schematic view of the utility model.

[0017] Fig. 2 This is a schematic diagram showing the fit between the five anti-accumulation circulation branch valves and pipelines of this utility model and the desulfurization tower wall.

[0018] In the diagram: 1. First ammonium sulfate discharge pump; 2. Second ammonium sulfate discharge pump; 3. Pump outlet to cyclone separator main valve; 4. Pump outlet to anti-accumulation pipeline main valve; 5. Anti-accumulation circulation pipeline; 6. First anti-accumulation circulation branch valve; 7. Second anti-accumulation circulation branch valve; 8. Third anti-accumulation circulation branch valve; 9. Fourth anti-accumulation circulation branch valve; 10. Fifth anti-accumulation circulation branch valve; 11. Pipeline end drain valve; 12. Desulfurization tower wall; 13. Oxidation air main pipe; 14. Supporting steel beam; 15. Oxidation air branch pipe. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0020] Example: Figs. 1-2 As shown, this utility model provides a device for preventing material accumulation at the bottom of an ammonia desulfurization tower, including a desulfurization tower wall 12. An anti-accumulation circulation pipe 5 is provided on the outer wall of the desulfurization tower wall 12. One end of the anti-accumulation circulation pipe 5 is provided with a pump outlet to the anti-accumulation pipeline main valve 4, and the other end of the anti-accumulation circulation pipe 5 is provided with a pipeline end drain valve 11. A first ammonium sulfate discharge pump 1 and a second ammonium sulfate discharge pump 2 are provided on one side of the pump outlet to the anti-accumulation pipeline main valve 4.

[0021] In one possible implementation, a first anti-accumulation circulation branch valve 6, a second anti-accumulation circulation branch valve 7, a third anti-accumulation circulation branch valve 8, a fourth anti-accumulation circulation branch valve 9, and a fifth anti-accumulation circulation branch valve 10 are provided on one side of the anti-accumulation circulation pipe 5. In another possible implementation, valve pipelines are inserted through the side walls of the first anti-accumulation circulation branch valve 6, the second anti-accumulation circulation branch valve 7, the third anti-accumulation circulation branch valve 8, the fourth anti-accumulation circulation branch valve 9, and the fifth anti-accumulation circulation branch valve 10. One end of the valve pipeline extends into the anti-accumulation circulation pipe 5, and the other end extends into the desulfurization tower wall 12, and the valve pipelines are arranged along the tangential direction of the desulfurization tower wall 12.

[0022] By adopting the technical scheme, the anti-material-accumulation circulating pipeline 5 is arranged at a position where material is prone to accumulate in the desulfurization tower, and the five branch valve pipelines are arranged along the tangent direction of the desulfurization tower wall, which aims to enable the tangential arrangement of the slurry circulation to make the slurry perform arc disturbance along the tangent of the desulfurization tower wall 12 in the tower, the slurry circulation can be controlled in a single loop, the slurry circulation disturbance effect is better, the five branch valve pipelines are DN50 stainless steel pipes, the five branch valve pipelines are additionally provided with ball valves, and the five branch valve pipelines enter the desulfurization tower at a position 60 mm away from the tower bottom.

[0023] In a possible implementation, the anti-material-accumulation circulating pipeline 5 is annular, and the anti-material-accumulation circulating pipeline 5 is arranged in an annular manner along the desulfurization tower wall 12, and one side of the first ammonium sulfate discharge pump 1 and the second ammonium sulfate discharge pump 2 is provided with a pump outlet de-swirler total valve 3.

[0024] By adopting the technical scheme, the anti-material-accumulation circulating pipeline 5 is arranged in an annular manner along the desulfurization tower wall 12 to cover the material-accumulation-prone area at the bottom of the ammonia desulfurization tower, and the pipeline enters the desulfurization tower through the circular arc tangent position along the tower wall to reduce the flushing and circulation blind area and better prevent local material accumulation. After each ammonium sulfate discharge is completed, the first ammonium sulfate discharge pump 1 or the second ammonium sulfate discharge pump 2 is started, the pump outlet de-swirler total valve 3 is closed, the pump outlet anti-material-accumulation pipeline total valve 4 is opened, and the first anti-material-accumulation circulating branch valve 6, the second anti-material-accumulation circulating branch valve 7, the third anti-material-accumulation circulating branch valve 8, the fourth anti-material-accumulation circulating branch valve 9, and the fifth anti-material-accumulation circulating branch valve 10 are opened, so that anti-material-accumulation slurry circulation can be performed. After each loop anti-material-accumulation slurry circulation is completed, the first ammonium sulfate discharge pump 1 and the second ammonium sulfate discharge pump 2 are stopped, and the pipeline end exhaust valve 11 is opened to exhaust the slurry. The pipeline end exhaust valve 11 is arranged at the low point of the pipeline end, which is convenient for pipeline exhaust after winter flushing and can also be connected with a water hose for high-pressure dredging flushing when the pipeline is blocked.

[0025] In a possible implementation, the inner side wall of the desulfurization tower wall 12 is fixedly connected with a support steel beam 14. In a possible implementation, the inside of the desulfurization tower wall 12 is provided with an oxidation air main pipe 13, the side wall of the oxidation air main pipe 13 is fixedly connected with an oxidation air branch pipe 15, and the oxidation air main pipe 13 and the oxidation air branch pipe 15 are staggered with the support steel beam 14.

[0026] By adopting the technical scheme, the oxidation air branch pipe 15 is 180 mm high and is arranged in a staggered manner with the support steel beam 14, which aims to prevent the slurry circulating pipeline from washing the oxidation air branch pipe 15 and the support steel beam 14 to protect the oxidation air branch pipe 15 and the support steel beam 14.

[0027] Working principle: the utility model discloses when using, after ammonium sulfate discharge is completed each time, start first sulfur ammonium discharge pump 1 or second sulfur ammonium discharge pump 2, close pump export cyclone total valve 3, and open pump export prevent material pipeline total valve 4, and open first prevent material circulation branch valve 6, second prevent material circulation branch valve 7, third prevent material circulation branch valve 8, fourth prevent material circulation branch valve 9, fifth prevent material circulation branch valve 10, can prevent material slurry circulation be carried out, after each loop prevent material slurry circulation is completed, stop first sulfur ammonium discharge pump 1 and second sulfur ammonium discharge pump 2, and open pipeline end exhaust valve 11, and slurry is discharged, and the pump export flushes water and flushes pipeline;

[0028] When ammonium sulfate does not discharge, first sulfur ammonium discharge pump 1 and second sulfur ammonium discharge pump 2 can also be started to carry out slurry circulation, prevent material in tower from accumulating, and tower bottom water flushing material operation can also be carried out by sulfur ammonium discharge pump outlet flushing water pipeline, and desulfurization tower liquid supplementing is carried out.

[0029] Obviously, those skilled in the art can make various modifications and variations to the utility model without departing from the spirit and scope of the utility model. Thus, if these modifications and variations of the utility model fall within the scope of the utility model claims and their equivalents, the utility model also intends to include these modifications and variations.

Claims

1. An ammonia desulphurization tower bottom material accumulation preventing device comprising a desulphurization tower wall (12), characterized in that: The outer wall of the desulfurization tower wall (12) is provided with an anti-material accumulation circulating pipeline (5), one end of the anti-material accumulation circulating pipeline (5) is provided with a pump outlet anti-material pipeline total valve (4), the other end of the anti-material accumulation circulating pipeline (5) is provided with a pipeline end exhaust valve (11), one side of the pump outlet anti-material pipeline total valve (4) is provided with a first ammonium sulfate discharge pump (1) and a second ammonium sulfate discharge pump (2).

2. An ammonia desulfurization tower bottom material accumulation preventing device according to claim 1, characterized in that, One side of the anti-material accumulation circulating pipeline (5) is provided with a first anti-material accumulation circulating branch valve (6), a second anti-material accumulation circulating branch valve (7), a third anti-material accumulation circulating branch valve (8), a fourth anti-material accumulation circulating branch valve (9) and a fifth anti-material accumulation circulating branch valve (10).

3. An ammonia desulfurization tower bottom material accumulation preventing device according to claim 2, characterized in that, The side walls of the first anti-material accumulation circulating branch valve (6), the second anti-material accumulation circulating branch valve (7), the third anti-material accumulation circulating branch valve (8), the fourth anti-material accumulation circulating branch valve (9) and the fifth anti-material accumulation circulating branch valve (10) are provided with valve pipelines, one end of the valve pipeline extends into the anti-material accumulation circulating pipeline (5), the other end of the valve pipeline extends into the desulfurization tower wall (12), and the valve pipeline is arranged along the tangent direction of the desulfurization tower wall (12).

4. An ammonia desulfurization tower bottom material accumulation preventing device according to claim 1, characterized in that, The anti-material accumulation circulating pipeline (5) is annular, and the anti-material accumulation circulating pipeline (5) is annularly arranged along the desulfurization tower wall (12).

5. An ammonia desulfurization tower bottom material accumulation preventing device according to claim 1, wherein The inner wall of the desulfurization tower wall (12) is fixedly connected with a support steel beam (14).

6. An ammonia desulphurization tower bottom material accumulation preventing device according to claim 5, characterized in that, The inside of the desulfurization tower wall (12) is provided with an oxidation air main pipe (13), the side wall of the oxidation air main pipe (13) is fixedly connected with an oxidation air branch pipe (15), and the oxidation air main pipe (13) and the oxidation air branch pipe (15) are staggered with the support steel beam (14).

7. An ammonia desulfurization tower bottom material accumulation preventing device according to claim 1, wherein One side of the first ammonium sulfate discharge pump (1) and the second ammonium sulfate discharge pump (2) is provided with a pump outlet cyclone total valve (3).

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