CN110833931A - Spray water treatment system of electric dust collector under negative pressure working condition - Google Patents
Spray water treatment system of electric dust collector under negative pressure working condition Download PDFInfo
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- CN110833931A CN110833931A CN201911149794.7A CN201911149794A CN110833931A CN 110833931 A CN110833931 A CN 110833931A CN 201911149794 A CN201911149794 A CN 201911149794A CN 110833931 A CN110833931 A CN 110833931A
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- water
- negative pressure
- tank
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- spray water
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/02—Plant or installations having external electricity supply
- B03C3/16—Plant or installations having external electricity supply wet type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/74—Cleaning the electrodes
- B03C3/78—Cleaning the electrodes by washing
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Particles Using Liquids (AREA)
Abstract
The invention discloses an electrostatic precipitator spray water treatment system under a negative pressure working condition, which belongs to the technical field of coal gas treatment and comprises a top spray water device and a bottom water storage tank which are arranged in a wet type electrostatic precipitator cylinder and are communicated up and down, wherein a sewage tank, a filter, a clean water tank and the spray water device are sequentially connected behind the water storage tank through pipelines, a check valve and a bypass pipe are sequentially arranged on the pipeline between the water storage tank and the sewage tank, the other end of the bypass pipe is connected back to the cylinder, the connecting point of the connecting point and the cylinder is higher than the liquid level of the sewage tank, and the height difference between the connecting point and the cylinder is larger than the liquid column height which can be. The system can reduce the water level of the water storage tank at the bottom of the wet electric dust collector and the water level of the sewage tank caused by the change of the negative pressure of the working condition to the maximum extent, prevent the dust deposition of the sewage tank and reduce the energy consumption of the fan.
Description
Technical Field
The invention belongs to the technical field of coal gas treatment, and particularly relates to a spraying water treatment system of an electric dust collector under a negative pressure working condition.
Background
The primary flue gas of the converter generated in the converter steelmaking process has complex components and large temperature fluctuation and needs a stable and reliable dust removal system. With the improvement of the environmental protection requirement of domestic iron and steel enterprises, the existing wet dust removal process can not meet the emission standard of the flue gas. In order to achieve the standard of the smoke and even achieve the ultra-low emission, some domestic steel plants embed a wet circular electric dust remover on the existing wet dust removal process, and purify the coal gas through the electric dust removal technology. The wet electric dust collector is generally arranged in front of a fan for reasons of land occupation and the like, and the pressure during working fluctuates periodically between-5 kPa and-25 kPa. In order to ensure reliable ash removal of the wet-type electric dust remover, the system generally needs to be provided with a circulating water treatment system separately, washes dust attached to the anode plate, and discharges dust-containing water to a sewage tank for treatment and recycling. However, in the dust-containing water discharge, the water level of the water storage tank at the bottom of the wet electric generator can be kept at a high level for a long time by the common U-shaped positive pressure water seal, and dust is precipitated at the water discharge port to cause water discharge accidents; the drain pipe is inserted into the water tank to form a negative pressure water seal, the pressure fluctuates from-5 to-25 kPa along with the working condition, if the height between the liquid level of the sewage tank and the bottom of the water storage tank of the wet electric dust collector is not enough, sewage can flow back to the inner periphery of the water storage tank from the sewage tank to periodically fluctuate, the fall in the water tank of the wet electric dust collector reaches 2m, the energy consumption is wasted, and the fluctuation of the water level in the sewage tank is large.
Disclosure of Invention
The invention aims to provide the spray water treatment system of the electric dust collector under the negative pressure working condition, which can prevent the sewage in the sewage tank from flowing back under the normal working condition of the wet electric dust collector, and can realize the energy-saving recycling of the spray water system through water treatment.
The invention is realized by the following technical scheme:
the invention provides an electrostatic precipitator spray water treatment system under a negative pressure working condition, which comprises a top spray water device and a bottom water storage tank which are arranged in a wet type electrostatic precipitator cylinder and are communicated up and down, wherein a sewage pool, a filter, a clean water pool and the spray water device are sequentially connected behind the water storage tank through pipelines, a one-way valve and a bypass pipe are sequentially arranged on the pipeline between the water storage tank and the sewage pool, the other end of the bypass pipe is connected back into the cylinder, the access point of the bypass pipe and the cylinder is higher than the liquid level of the sewage pool, and the height difference between the access point and the cylinder is larger than the liquid column height which can be lifted by the negative pressure under the.
Furthermore, an external compressed air pipeline is paved at the bottom of the sewage pool, and the sewage pool is provided with a plurality of aeration pipes with upward nozzles.
Further, a dosing device is arranged at the top of the sewage pool.
Furthermore, an intermediate water pump is arranged on a pipeline between the sewage pool and the filter.
Furthermore, the filter is a sand filter, filtered water enters a clean water tank through a pipeline, and suspended matters after filtering enter a sludge tank through a pipeline.
Furthermore, a water supply pump is arranged on a pipeline between the clean water tank and the spray water device.
Further, an automatic water replenishing device is arranged at the top of the clean water tank.
Further, a liquid level switch is arranged inside the clean water tank.
The invention has the advantages that:
1. when the working condition negative pressure is low, the drainage of the bottom water storage tank is discharged to the sewage tank through the one-way valve, when the working condition negative pressure is high, the bottom water storage tank stops draining, sewage flows back to the bypass pipe under the action of the negative pressure and fluctuates in the pipe, the change of the water level of the bottom water storage tank and the water level of the sewage tank caused by the change of the working condition negative pressure can be reduced to the greatest extent, and the energy consumption of the fan is reduced.
2. This system is provided with charge device and compressed air through the effluent water sump and sweeps, condenses the tiny dust in the effluent water sump and prevents it deposit to the bottom of the pool, has prolonged the effluent water sump and has decontaminated the cycle.
3. The system realizes energy-saving recycling of spray water by treating sewage through the sand filter and then feeding the sewage into the clean water tank and sending the sewage into the top spray water device through the water supply pump.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic structural view of the present invention;
element number description: 1. the device comprises a spray water device, a water storage tank, a check valve, a bypass pipe, a cylinder, a compressed air pipeline, a sewage tank, a middle water pump, a sand filter, a sludge tank, an aeration pipe, a dosing device, a clean water tank, an automatic water replenishing device, a water supply pump, a liquid level meter and a water supply pump, wherein the spray water device comprises 2, a water storage tank, 3, a check valve, 4, a bypass pipe, 5, the cylinder, 6, the compressed air pipeline, 7, the sewage tank, 8, the.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
As shown in fig. 1, in the electrostatic precipitator spray water treatment system under the negative pressure working condition in this embodiment, a spray water device 1 at the top of a wet electrostatic precipitator cylinder 5 releases a large amount of water through a nozzle thereof, dust is flushed from a dust collecting plate of the wet electrostatic precipitator and enters a water storage tank 2 at the bottom under the action of gravity, the water storage tank 2 is sequentially connected with a sewage tank 7, a filter 9 and a clean water tank 13 through a pipeline, and clean water in the treated clean water tank is recycled to the spray water device 1 at the top, so that energy-saving recycle of the spray water is realized; meanwhile, a one-way valve 3 and a bypass pipe 4 are sequentially arranged on a pipeline between the water storage tank 2 and the sewage tank 7 along the flowing direction of the pipeline, the other end of the bypass pipe 4 is connected back to the barrel 5, the connection point of the bypass pipe 4 and the barrel 5 is higher than the normal liquid level height of the sewage tank 7, and the height difference between the connection point and the barrel 5 is larger than the liquid column height which can be lifted by the high working condition negative pressure of the barrel 5, namely when the working condition negative pressure is not large, sewage in the water storage tank 2 overcomes the on-way resistance in the pipeline and is discharged to the sewage tank 7 through; when the working condition negative pressure is large, the sewage in the water storage tank 2 cannot be discharged under the action of gravity, and the sewage in the sewage tank 7 flows back through the pipeline instead and enters the bypass pipe 4; and the height difference between the upper access end of the bypass pipe 4 connected with the cylinder 5 and the liquid level of the sewage tank 7 is larger than the liquid level height under the maximum working condition negative pressure, so that sewage cannot flow back into the wet electric dust collector equipment when the maximum working condition negative pressure is ensured, and the sewage only fluctuates in the bypass pipe. Because the pipe diameter of the bypass pipe is far smaller than the water storage tank of the wet electric dust collector, the energy consumption is low, and the energy consumption of the fan can be reduced.
The upper portion of effluent water sump 7 in this embodiment is provided with charge device, through adding the flocculating agent with tiny dust particle reunion, and effluent water sump 7 bottom is provided with the aeration pipe 11 that has nozzle up to blow compressed air into the effluent water sump in through compressed air pipeline 6 by the aeration pipe, disturb the effluent water sump, prevent the deposit of dust particle.
The intermediate water pump 8 in this embodiment pumps the sewage in the sewage tank 7, and sends the sewage into the filter 9 for filtering, and the treated circulating water enters the clean water tank 13. The filter adopts a sand filter, when the resistance of the sand filter is larger, the sand filter can carry out back flushing, and the filtered suspended matters are discharged into the sludge tank 10.
The upper part of the clean water tank 13 in this embodiment is provided with an automatic water replenishing device 14, and the water is replenished according to the water level set by a liquid level switch 16 arranged in the clean water tank.
In this embodiment, the water in the clean water tank 13 is lifted to the top spray water device 1 by the water supply pump 15 through a pipeline, so as to realize the circulation and treatment of the spray water of the wet electric precipitator.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and it is apparent that those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. The utility model provides an electrostatic precipitator spray water processing system under negative pressure operating mode, including locating top spray water installation (1) and bottom aqua storage tank (2) of wet-type electrostatic precipitator barrel (5) interior and upper and lower intercommunication, a serial communication port, connect gradually effluent water sump (7) through the pipeline behind the aqua storage tank, filter (9), clean water basin (13) and spray water installation, set gradually check valve (3) and bypass pipe (4) on the pipeline between aqua storage tank to the effluent water sump, the barrel is gone back into to the other end of bypass pipe, and be higher than effluent water sump liquid level height and the liquid column height that both difference in height were greater than the high-duty condition negative pressure of barrel and promoted with the access point of barrel.
2. The spray water treatment system of the electric dust collector under the negative pressure working condition as claimed in claim 1, wherein an external compressed air pipeline (6) is paved at the bottom of the sewage pool, and the aeration pipe (11) is provided with a plurality of upward nozzles.
3. The electric dust collector spray water treatment system under the negative pressure working condition as claimed in claim 1, wherein a dosing device (12) is arranged at the top of the sewage pool.
4. The spray water treatment system of the electric dust collector under the negative pressure working condition as recited in claim 1, wherein an intermediate water pump (8) is arranged on a pipeline between the sewage pool and the filter.
5. The electric precipitator spray water treatment system under the negative pressure working condition according to claim 1, wherein the filter is a sand filter, filtered water enters a clean water tank through a pipeline, and suspended matters in the filtered water enter a sludge tank (10) through a pipeline.
6. The spray water treatment system of the electric dust collector under the negative pressure working condition as claimed in claim 1, wherein a water supply pump (15) is arranged on a pipeline between the clean water tank and the spray water device.
7. The spray water treatment system of the electric dust collector under the negative pressure working condition as claimed in claim 1, wherein an automatic water replenishing device (14) is arranged at the top of the clean water tank.
8. The spray water treatment system of the electric dust collector under the negative pressure working condition as claimed in claim 1, wherein a liquid level switch (16) is arranged inside the clean water tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911149794.7A CN110833931A (en) | 2019-11-21 | 2019-11-21 | Spray water treatment system of electric dust collector under negative pressure working condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911149794.7A CN110833931A (en) | 2019-11-21 | 2019-11-21 | Spray water treatment system of electric dust collector under negative pressure working condition |
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| Publication Number | Publication Date |
|---|---|
| CN110833931A true CN110833931A (en) | 2020-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911149794.7A Pending CN110833931A (en) | 2019-11-21 | 2019-11-21 | Spray water treatment system of electric dust collector under negative pressure working condition |
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| CN (1) | CN110833931A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114308386A (en) * | 2021-12-21 | 2022-04-12 | 深圳市天得一环境科技有限公司 | Dust electrostatic recovery device |
| CN115569470A (en) * | 2022-10-21 | 2023-01-06 | 昆明理工大学 | Flue gas treatment system for in-situ pyrolysis of degraded soil and application method thereof |
| WO2023196286A1 (en) * | 2022-04-07 | 2023-10-12 | The United States Of America, As Represented By The Secretary Of Agriculture | A system for removing ammonia, dust and pathogens from air within an animal rearing/sheltering facility |
-
2019
- 2019-11-21 CN CN201911149794.7A patent/CN110833931A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114308386A (en) * | 2021-12-21 | 2022-04-12 | 深圳市天得一环境科技有限公司 | Dust electrostatic recovery device |
| WO2023196286A1 (en) * | 2022-04-07 | 2023-10-12 | The United States Of America, As Represented By The Secretary Of Agriculture | A system for removing ammonia, dust and pathogens from air within an animal rearing/sheltering facility |
| CN115569470A (en) * | 2022-10-21 | 2023-01-06 | 昆明理工大学 | Flue gas treatment system for in-situ pyrolysis of degraded soil and application method thereof |
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