Device for reducing sulfur dioxide overflow of electric dust collection scraper

Abstract

The utility model discloses a device for reducing sulfur dioxide overflow of an electric dust collection scraper, which relates to the technical field of flue gas dust removal, and comprises a gas mixing chamber, dust removal equipment, a fan, a scraper and a single bag-type dust remover, the dust removal equipment comprises an electric dust remover, a pipeline I is fixedly connected between a gas outlet of the gas mixing chamber and a gas inlet of the electric dust remover, and a pipeline II is fixedly connected between the gas outlet of the gas mixing chamber and a gas outlet of the electric dust remover. A scraper machine is installed at the bottom of the gas mixing chamber, an outlet of the scraper machine is fixedly connected with a negative pressure pipe, the end, away from the scraper machine, of the negative pressure pipe is fixedly connected to the outer end of the first pipeline, and a pressure gauge and a valve are installed on the negative pressure pipe; the negative pressure pipe is arranged between the scraper and the air inlet of the electric dust remover, the valve is arranged on the negative pressure pipe to adjust the negative pressure, and the pressure gauge is additionally arranged to detect the pressure in the negative pressure pipe, so that the positive pressure condition in the scraper can be improved, the sulfur dioxide overflow phenomenon is effectively reduced, the field environment is improved, and the production efficiency is improved. And the cloth bag replacement frequency of the single bag-type dust collector is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas dust removal, in particular to a device for reducing the spillage of sulfur dioxide from the scraper of an electrostatic precipitator. Background Art

[0002] When treating the flue gas of a smelting furnace and a converter, due to the unreasonable configuration of the flue gas pipeline at the inlet of the mixing chamber of the electrostatic precipitator, the scraper at the bottom of the mixing chamber is in a positive pressure state, and because the sealing performance of the scraper is average, sulfur dioxide often overflows. The smell of sulfur dioxide is very strong at the site and in the dust packaging room, which not only affects the health of employees but also the surrounding environment. Also, due to the connection between the scraper at the bottom of the mixing chamber and the single-bag dust collector in the dust packaging room, the high-concentration sulfur dioxide causes frequent damage to the bags of the single-bag dust collector. Frequent replacement of the bags not only increases costs but also workload.

[0003] If reconfigured, due to restrictions such as site conditions, it is very difficult and the workload is also large. If the scraper at the bottom of the mixing chamber is always maintained at a slightly negative pressure, the negative pressure at the inlet of the electrostatic precipitator is about -600 Pa, but this solution is not economical and will increase the power consumption of the fan. Content of the Utility Model

[0004] To solve the above technical problems, the utility model designs a device for reducing the spillage of sulfur dioxide from the scraper of an electrostatic precipitator.

[0005] The utility model adopts the following technical scheme:

[0006] A device for reducing the spillage of sulfur dioxide from the scraper of an electrostatic precipitator, comprising a mixing chamber, a dust removal device, a fan, a scraper and a single-bag dust collector. A flue gas pipe is installed at the air inlet of the mixing chamber, a scraper is installed at the bottom of the mixing chamber, a single-bag dust collector is installed at the outlet of the scraper, the mixing chamber is sequentially connected to the dust removal device and the fan. The dust removal device includes an electrostatic precipitator. A pipe I is fixedly connected between the air outlet of the mixing chamber and the air inlet of the electrostatic precipitator. A pipe II is fixedly connected between the dust removal device and the fan. A pipe III is fixedly connected between the scraper and the single-bag dust collector. A negative pressure pipe is fixedly connected to the outlet of the scraper. The end of the negative pressure pipe far from the scraper is fixedly connected to the outer end of the pipe I, and the negative pressure pipe is communicated with the pipe I. A valve is installed on the negative pressure pipe.

[0007] Preferably, a pressure gauge is installed on the negative pressure pipe.

[0008] Preferably, a star valve is fixedly connected between the mixing chamber and the scraper through a flange.

[0009] Preferably, the flue gas pipe includes a spherical flue gas pipe, which is fixedly installed at the air inlet of the gas mixing chamber. One side of the spherical flue gas pipe is provided with a smelting furnace flue gas pipe and a converter flue gas pipe.

[0010] Preferably, the negative pressure pipe adopts a DN200 pipe.

[0011] The beneficial effects of the present utility model are as follows: By configuring a negative pressure pipe between the scraper conveyor and the air inlet of the electrostatic precipitator and installing a valve on the negative pressure pipe to adjust the negative pressure, and at the same time adding a pressure gauge to detect the pressure in the negative pressure pipe, the positive pressure situation in the scraper conveyor can be improved, thereby effectively reducing the phenomenon of sulfur dioxide overflow, improving the on-site environment, and significantly reducing the frequency of replacing the filter bags of the single-unit bag filter. Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of the present utility model;

[0013] In the figure: 1. Gas mixing chamber, 2. Flue gas pipe, 21. Spherical flue gas pipe, 22. Smelting furnace flue gas pipe, 23. Converter flue gas pipe, 3. Dust removal equipment, 4. Electrostatic precipitator, 5. Pipe 1, 6. Fan, 7. Pipe 2, 8. Scraper conveyor, 9. Star valve, 10. Single-unit bag filter, 11. Pipe 3, 12. Negative pressure pipe, 13. Pressure gauge, 14. Valve. Detailed Embodiments

[0014] The technical solutions of the present utility model will be further specifically described below through specific embodiments in conjunction with the drawings:

[0015] Embodiment: As Figure 1 shown, a device for reducing sulfur dioxide overflow of the electric dust collection scraper conveyor includes a gas mixing chamber 1, dust removal equipment 3, a fan 6, a scraper conveyor 8, and a single-unit bag filter 10. The dust removal equipment 3 includes an electrostatic precipitator 4. A flue gas pipe 2 is installed at the air inlet of the gas mixing chamber 1. A pipe 1 5 is fixedly connected between the air outlet of the gas mixing chamber 1 and the air inlet of the electrostatic precipitator 4. A pipe 2 7 is fixedly connected between the dust removal equipment 3 and the fan 6. A scraper conveyor 8 is installed at the bottom of the gas mixing chamber 1. A single-unit bag filter 10 is installed at the outlet of the scraper conveyor 8. A pipe 3 11 is fixedly connected between the scraper conveyor 8 and the single-unit bag filter 10. A negative pressure pipe 12 is fixedly connected to the outlet of the scraper conveyor 8. The end of the negative pressure pipe 12 away from the scraper conveyor 8 is fixedly connected to the outer end of the pipe 1 5, and the negative pressure pipe 12 is communicated with the pipe 1 5. A pressure gauge 13 and a valve 14 are installed on the negative pressure pipe 12. A star valve 9 is fixedly connected between the gas mixing chamber 1 and the scraper conveyor 8 by a flange. The flue gas pipe 2 includes a spherical flue gas pipe 21, which is fixedly installed at the air inlet of the gas mixing chamber 1. One side of the spherical flue gas pipe 21 is provided with a smelting furnace flue gas pipe 22 and a converter flue gas pipe 23.

[0016] The negative pressure pipe 12 is DN200. Through the cooperation of the negative pressure pipe 12, the pressure gauge 13 and the valve 14, the positive pressure situation in the scraper conveyor 8 can be improved, thereby reducing the phenomenon of sulfur dioxide overflow in the scraper conveyor 8, further improving the environment, and also reducing the frequency of replacing the bags of the single-unit bag filter.

[0017] Working principle:

[0018] During operation, the fan 6 is always turned on. The fan 6 provides negative pressure for each device. The smelting furnace flue gas and the converter flue gas are respectively guided to the mixing chamber 1 through the smelting furnace flue gas pipe 22 and the converter flue gas pipe 23. Subsequently, the flue gas settles inside the mixing chamber 1. Opening the star valve 9 allows the dust to enter the scraper conveyor 8. The scraper conveyor 8 then guides the dust to the single-unit bag filter 10 through the third pipe 11 for filtration. The flue gas in the mixing chamber 1 is continuously guided to the electrostatic precipitator 4 in the dust removal device 3 through the first pipe 5. Since a negative pressure pipe 12 is added between the scraper conveyor 8 and the electrostatic precipitator 4, the positive pressure situation in the scraper conveyor 8 can be improved. During this period, the pressure value in the negative pressure pipe 12 can be detected by the pressure gauge 13, and the negative pressure can be adjusted through the valve 14.

[0019] The above-described embodiments are only a preferred solution of the present invention and do not impose any form of limitation on the present invention. There are other variations and modifications without exceeding the technical solutions described in the claims.

Claims

1. A device for reducing the spillage of sulfur dioxide from the scraper of an electrostatic precipitator, comprising a gas mixing chamber (1), a dust removal device (3), a fan (6), a scraper (8) and a single-bag dust collector (10). A flue gas pipe (2) is installed at the air inlet of the gas mixing chamber (1). The scraper (8) is installed at the bottom of the gas mixing chamber (1). The single-bag dust collector (10) is installed at the outlet of the scraper (8). The gas mixing chamber (1) is sequentially connected to the dust removal device (3) and the fan (6), and is characterized in that, The dust removal device (3) includes an electrostatic precipitator (4). A first pipe (5) is fixedly connected between the air outlet of the gas mixing chamber (1) and the air inlet of the electrostatic precipitator (4). A second pipe (7) is fixedly connected between the dust removal device (3) and the fan (6). A third pipe (11) is fixedly connected between the scraper conveyor (8) and the single-bag dust collector (10). A negative pressure pipe (12) is fixedly connected to the outlet of the scraper conveyor (8). One end of the negative pressure pipe (12) far from the scraper conveyor (8) is fixedly connected to the outer end of the first pipe (5), and the negative pressure pipe (12) is communicated with the first pipe (5). A valve (14) is installed on the negative pressure pipe (12).

2. The device for reducing sulfur dioxide spillage of the electric dust collector scraper according to claim 1, wherein, A pressure gauge (13) is installed on the negative pressure pipe (12).

3. The device for reducing sulfur dioxide overflow of the electric dust collector scraper according to claim 1 is characterized in that, A star valve (9) is fixedly connected between the gas mixing chamber (1) and the scraper conveyor (8) through a flange.

4. The device for reducing sulfur dioxide spillage of the electric dust collector scraper machine according to claim 1 is characterized in that, The smoke pipe (2) includes a spherical smoke pipe (21). The spherical smoke pipe (21) is fixedly installed at the air inlet of the gas mixing chamber (1). A smelting furnace smoke pipe (22) and a converter smoke pipe (23) are installed on one side of the spherical smoke pipe (21).

5. The device for reducing sulfur dioxide spillage of the electric dust collector scraper according to claim 1, characterized in that, The negative pressure pipe (12) adopts a DN200 pipe.

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