Dedusting and flushing device for raw flue gas of desulfurizing absorption tower

Abstract

The utility model relates to a dedusting and flushing device for raw flue gas of a desulfurizing absorption tower, which comprises a flue gas dedusting water pump, one end of the flue gas dedusting water pump is connected with a process water tank through a seamless steel pipe, and the other end of the flue gas dedusting water pump is connected to the upper part of an inlet flue of the desulfurizing absorption tower through a flushing water pipeline; a plurality of hole sites are vertically formed above an inlet flue of the desulfurizing absorption tower, the hole sites are used for mounting flange sleeves, and the flange sleeves are used for connecting the flushing water pipeline and the inlet flue; a plurality of groups of spraying branch pipes are arranged in the inlet flue in parallel, one end of each spraying branch pipe extends into the inlet flue for spraying, and the other end of each spraying branch pipe is connected with the flushing water pipeline vertical flange. A pipeline and a valve are installed at an outlet of a flue gas dust removal water pump, the pipeline is laid above an inlet flue, a spraying device is arranged in the pipeline, and one-time efficient particle dust removal is achieved through atomization spraying.

Description

Technical Field

[0001] The utility model relates to the technical field of raw flue gas dust removal, in particular to a raw flue gas dust removal and flushing device for a desulfurization absorption tower. Background Art

[0002] The original flue gas at the tail of the boiler of the original gas power station is usually sent to the desulfurization absorption tower through two induced draft fans for emission treatment of nitrogen oxides, sulfur dioxide, and flue gas dust particles. However, due to the high content of dust particles in the coal gas, the particles in the original flue gas at the tail of the boiler are still close to the edge of the standard emission value after the desulfurization demister flushing and wet electrostatic precipitator treatment, which is easy to cause environmental accidents.

[0003] In addition, the original flue gas temperature is relatively high, reaching a maximum of about 155 degrees Celsius. Continuous high-temperature operation is not conducive to the safe and stable operation of the desulfurization tower.

[0004] Therefore, it is urgent to explore a low-temperature operating flue gas dust removal and flushing device for the desulfurization absorption tower. Utility Model Content

[0005] The utility model aims to provide a raw flue gas dust removal and flushing device for a desulfurization absorption tower, which solves the problems of excessive particle emission and high temperature operation during the raw flue gas absorption treatment process of the desulfurization absorption tower in the prior art.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] The utility model provides a flue gas dust removal flushing device for a desulfurization absorption tower, comprising a flue gas dust removal water pump, one end of which is connected to a process water tank through a seamless steel pipe, and the other end of which is connected to the top of the inlet flue of the desulfurization absorption tower through a flushing water pipeline;

[0008] A plurality of holes are vertically opened above the inlet flue of the desulfurization absorption tower, and the holes are used to install flange sleeves, and the flange sleeves are used to connect the flushing water pipeline and the inlet flue;

[0009] A plurality of spray branch pipes are arranged in parallel in the inlet flue, one end of each spray branch pipe extends into the inlet flue for spraying, and the other end of each spray branch pipe is vertically flange-connected to the flushing water pipeline.

[0010] Furthermore, the process water tank is provided with a plurality of water outlets for connecting a plurality of the flue gas dust removal water pumps.

[0011] Furthermore, a clamp-type butterfly valve is provided at the connection between the water outlet of the process water tank and the seamless steel pipe, for controlling the switch of the water outlet of the process water tank.

[0012] Furthermore, a non-metallic compensator is provided at the connection between the flue gas dust removal water pump and the seamless steel pipe for compensating for pipeline stress, and the non-metallic compensator is connected to the inlet of the flue gas dust removal water pump through a flange.

[0013] Furthermore, a stop valve is also provided on the seamless steel pipe to stop the water outflow from the process water tank.

[0014] Furthermore, the diameter of the wash water pipeline gradually decreases along the outflow direction of the water flow in the process water tank.

[0015] Furthermore, a plurality of nozzles are arranged at intervals on the spray branch pipe to provide water jets.

[0016] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0017] The utility model discloses a flue gas dust removal and flushing device for a desulfurization absorption tower. Pipes and valves are installed at the outlet of a flue gas dust removal water pump, and the pipelines are laid above an inlet flue. Meanwhile, holes are opened above the inlet flue to install multiple sets of flange sleeves, which are respectively connected to multiple sets of spray devices, and the spray devices are extended to the inside of the flue. Multiple atomizing nozzles are installed on each spray device to achieve primary dust removal through atomizing spraying, eliminate large particles of dust, and reduce the burden on secondary wet electrostatic precipitator. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0019] Figure 1 This is a flue gas dust removal water pump inlet pipeline diagram of a flue gas dust removal flushing device of a desulfurization absorption tower provided by the utility model;

[0020] Figure 2 This is a flue gas dust removal water pump outlet pipeline diagram of a flue gas dust removal flushing device of a desulfurization absorption tower provided by the utility model;

[0021] Figure 3 This is a pipeline layout diagram of a flushing water pipeline at the inlet flue of a desulfurization absorption tower original flue gas dust removal flushing device provided by the utility model;

[0022] The reference numerals are described as follows:

[0023] 1. Flue gas dust removal water pump; 2. Process water tank; 21. Water outlet; 3. Desulfurization absorption tower; 31. Inlet flue; 32. Flange sleeve; 4. Seamless steel pipe; 5. Wafer-type butterfly valve; 6. Flange; 7. Stop valve; 8. Flushing water pipeline; 9. Spray branch pipe; 10. Nozzle. DETAILED DESCRIPTION

[0024] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are 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.

[0025] See also Figure 1 to Figure 2 As shown, in order to make the diagram clear, the pump inlet piping diagram and the pump outlet piping diagram are drawn separately.

[0026] Specifically, the original flue gas dust removal flushing device of the desulfurization absorption tower includes a flue gas dust removal water pump 1, Figure 1 In the pump inlet pipeline diagram shown, one end of the flue gas dust removal water pump 1 is connected to the process water tank 2 through a seamless steel pipe 4. The process water tank 2 is provided with multiple water outlets 21 for connecting multiple flue gas dust removal water pumps 1, thereby supplying water to the flue gas dust removal water pump 1. The number of water outlets 21 can be reasonably set on the process water tank 2 according to actual production needs, and the corresponding number of flue gas dust removal water pumps 1 can be arranged. The flue gas dust removal flushing efficiency can be improved according to the arrangement situation, and the standby combination can also be realized.

[0027] At the same time, a wafer-type butterfly valve 5 is provided at the connection between the seamless steel pipe 4 and the water outlet 21 on the process water tank 2, which is used to control the switch of the water outlet 21 of the process water tank 2. The wafer-type butterfly valve 5 can ensure that the butterfly valve has good sealing performance in the closed state, and effectively prevent water leakage. In addition, the wafer-type connection of the wafer-type butterfly valve 5 makes installation and disassembly very convenient and quick, and correspondingly improves work efficiency. A stop valve 7 is also provided on the seamless steel pipe 4, which is used to stop the water supply from the process water tank 2 to the flue gas dust removal water pump 1.

[0028] The wafer butterfly valve 5 and the stop valve 7 work together to ensure that there will be no pipeline leakage during the water supply process of the process water tank 2. At the same time, if a valve fails temporarily, the water supply can be intercepted by closing another valve to achieve two-way water supply protection.

[0029] In addition, a non-metal compensator (not shown in the figure) is provided at the connection between the seamless steel pipe 4 and the flue gas dust removal water pump 1 to compensate for the thermal expansion and contraction of the pipeline when the temperature changes, so as to protect the seamless steel pipe 4 and the flue gas dust removal water pump 1 from damage. By installing the non-metal compensator, the stress of the seamless steel pipe 4 can be effectively reduced, the service life of the equipment can be extended, and the stability and safety of the device can be improved.

[0030] The above-mentioned non-metallic compensator and the inlet of the flue gas dust removal water pump 1 are connected via a flange 6, which can effectively reduce the risk of corrosion and oxidation at the interface, correspondingly reduce the possibility of water leakage, and ensure the sealing and stability of the device.

[0031] Figure 2 In the pump outlet pipeline diagram shown, the flue gas dust removal water pump 1 extends to the top of the desulfurization absorption tower 3 through a flushing water pipeline 8. Figure 3 As shown, the flushing water pipeline 8 is actually arranged above the inlet flue 31 of the desulfurization absorption tower 3, and the water outlet in the process water tank 2 is directed to the top of the inlet flue 31, so as to supply water to the flue for cleaning and dust removal.

[0032] At the same time, in this device, a plurality of holes are vertically opened above the inlet flue 31, corresponding to the installation flange sleeve 32, so as to connect the flushing water pipe 8 and the inlet flue 31. A plurality of groups of spray branch pipes 9 are arranged in parallel inside the inlet flue 31, and the number of the spray branch pipes 9 is consistent with the number of holes opened above the inlet flue 31, and one end of the spray branch pipe 9 is connected to the flushing water pipe 8, so as to drain the water of the flushing water pipe 8 into the spray branch pipe 9.

[0033] A plurality of nozzles 10 are installed at intervals on each group of spray branch pipes 9. With the support of the nozzles 10, atomization spraying is performed in the flue. At the same time, combined with the function of the plurality of groups of spray branch pipes, maximum particle dust removal is achieved.

[0034] It should also be noted that the layout principle of the flushing water pipe 8 in the present device is to gradually reduce the diameter of the flushing water pipe 8 above the inlet flue 31 according to the water outlet direction of the process water tank 2. In this way, according to the principle that the product of the pipe cross-sectional area and the water flow velocity is equal to the water flow rate, when the water flow rate of each spray branch pipe 9 is controlled at an equal flow rate, as the cross-sectional area of ​​the pipe gradually becomes smaller, the water flow velocity in the corresponding pipe becomes faster, thereby ensuring the atomization effect of the nozzle 10 on the spray branch pipe 9 relatively far away from the process water tank 2, and ensuring the uniform spray dust removal effect in the flue.

[0035] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly. They cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A desulfurization absorption tower original flue gas dust removal flushing device, characterized in that: It comprises a flue gas dust removal water pump (1), one end of the flue gas dust removal water pump (1) is connected to a process water tank (2) via a seamless steel pipe (4), and the other end of the flue gas dust removal water pump (1) is connected to the top of the inlet flue (31) of the desulfurization absorption tower (3) via a flushing water pipeline (8); A plurality of holes are vertically opened above the inlet flue (31) of the desulfurization absorption tower (3), the holes being used to install flange sleeves (32), the flange sleeves (32) being used to connect the flushing water pipeline (8) and the inlet flue (31); A plurality of spray branch pipes (9) are arranged in parallel in the inlet flue (31), one end of each spray branch pipe (9) extends into the inlet flue (31) for spraying, and the other end of each spray branch pipe (9) is vertically flange-connected to the flushing water pipeline (8).

2. The original flue gas dust removal and flushing device of the desulfurization absorption tower according to claim 1 is characterized in that: The process water tank (2) is provided with a plurality of water outlets (21) for connecting to a plurality of flue gas dust removal water pumps (1).

3. The original flue gas dust removal and flushing device of the desulfurization absorption tower according to claim 2 is characterized in that: A wafer-type butterfly valve (5) is provided at the connection between the water outlet (21) of the process water tank (2) and the seamless steel pipe (4), and is used to control the opening and closing of the water outlet (21) of the process water tank (2).

4. The original flue gas dust removal and flushing device of the desulfurization absorption tower according to claim 1 is characterized in that: A non-metallic compensator is provided at the connection between the flue gas dust removal water pump (1) and the seamless steel pipe (4) for compensating for pipeline stress; the non-metallic compensator is connected to the inlet of the flue gas dust removal water pump (1) via a flange (6).

5. The original flue gas dust removal and flushing device of the desulfurization absorption tower according to claim 1 is characterized in that: The seamless steel pipe (4) is also provided with a stop valve (7) for stopping the water outflow from the process water tank (2).

6. The original flue gas dust removal and flushing device of the desulfurization absorption tower according to claim 1 is characterized in that: The flushing water pipeline (8) has a diameter that gradually decreases along the outflow direction of the water flow in the process water tank (2).

7. The original flue gas dust removal and flushing device of the desulfurization absorption tower according to claim 1 is characterized in that: A plurality of nozzles (10) are arranged at intervals on the spray branch pipe (9) for providing water jets.

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