Coal conveying system wet electric dust collector integrated with ash-water separation system

Abstract

The utility model discloses a coal conveying system wet electric dust collector integrated with an ash-water separation system, and relates to the technical field of dust collector equipment. A sewage outlet at the bottom of the dust remover is connected with a water inlet of the sewage tank through a pipeline, a water outlet of the sewage tank is connected with a water inlet of the sludge pressing machine through a pipeline, a discharge port of the sludge pressing machine is connected with a water inlet of the reclaimed water tank through a pipeline, and a water outlet of the reclaimed water tank is connected with a water inlet of the dust remover through a pipeline. By means of the device, sludge pressing treatment can be conducted on sewage generated after the dust remover is flushed, sludge cakes and water are separated out, the sewage treatment and recycling speed is increased, the separated water can be stored and then used for spraying and flushing the dust remover again, sewage recycling is achieved, sewage discharge is reduced, and environment-friendly operation is achieved.

Description

Technical Field

[0001] The utility model relates to a wet electrostatic precipitator for a coal conveying system with an integrated ash-water separation system, and relates to the technical field of precipitator equipment. Background Art

[0002] The basic operating principle of the wet electrostatic precipitator in the coal conveying system is to pass the dust generated during the coal conveying process into the dust removal tower. Under the action of the electric field, the coal powder particles in the dust are gradually adsorbed on the electrodes, which plays a role in purifying the air. However, the continuous accumulation of coal powder particles on the electrodes will weaken the dust removal effect, so it is necessary to spray and flush with water regularly to keep the overall purification effect of the dust collector in the best condition. However, many application scenarios of wet electrostatic precipitators in coal conveying systems are located in arid and remote areas such as the west and northwest, where water resources are scarce and water supply is difficult. Therefore, the sewage generated by spraying and flushing the dust removal tower needs to be filtered and recycled.

[0003] Sedimentation tanks are the most energy-efficient way to purify water, as they allow the coal powder particles in the sewage to settle naturally. However, sedimentation tanks occupy a large area and have low natural sedimentation efficiency, making it difficult to fill water gaps in a timely manner. Utility Model Content

[0004] The purpose of the utility model is to provide a wet electrostatic precipitator for a coal conveying system with an integrated ash-water separation system in response to the defects or shortcomings in the prior art, which can carry out mud pressing treatment on the sewage after flushing the dust collector to separate the mud cake and water. The separated water can be stored and then reused for spraying and flushing the dust collector, thereby realizing the recycling of sewage and achieving environmentally friendly operations.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: it includes a mud press 1, a dust collector 2, a sewage tank 3, and a grey water tank 4. The sewage outlet at the bottom of the dust collector 2 is connected to the water inlet of the sewage tank 3 through a pipeline, the drain outlet of the sewage tank 3 is connected to the water inlet of the mud press 1 through a pipeline, the discharge outlet of the mud press 1 is connected to the water inlet of the grey water tank 4 through a pipeline, and the drain outlet of the grey water tank 4 is connected to the water inlet of the dust collector 2 through a pipeline.

[0006] Furthermore, the mud press 1 is also provided with a mud cake discharge port.

[0007] Furthermore, a dust collecting pipe 5 is provided on one side of the dust collector 2, and the dust collecting pipe 5 is connected to the filter bag of the dust collector 2.

[0008] Furthermore, the sewage tank 3 is provided with a pH detection device.

[0009] Furthermore, the sewage tank 3 is also provided with an acid and alkali preparation delivery device.

[0010] Furthermore, the intermediate water tank 4 is also provided with a water replenishment port.

[0011] After adopting the above technical solution, the beneficial effects of the present utility model are as follows: It can carry out sludge pressing treatment on the sewage after flushing the dust collector, separate the sludge cake and water, improve the treatment and reuse speed of the sewage, the separated water can be stored and then reused for spraying and flushing the dust collector, realizing the recycling of the sewage, reducing the sewage discharge, and achieving environmental protection operations. Brief Description of the Drawings

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0013] Figure 1 It is a schematic structural diagram of the present utility model;

[0014] Figure 2 It is a schematic working process diagram of the present utility model.

[0015] Description of the reference numerals: sludge press 1, dust collector 2, sewage tank 3, reclaimed water tank 4, dust collection pipe 5. Detailed Embodiments

[0016] See Figure 1 - Figure 2As shown in the figure, the technical solution adopted in this specific embodiment is as follows: It includes a sludge press 1, a dust collector 2, a sewage tank 3, and a reclaimed water tank 4. The sewage discharge port at the bottom of the dust collector 2 is connected to the water inlet of the sewage tank 3 through a pipeline. The water discharge port of the sewage tank 3 is connected to the water inlet of the sludge press 1 through a pipeline. The discharge port of the sludge press 1 is connected to the water inlet of the reclaimed water tank 4 through a pipeline. The water discharge port of the reclaimed water tank 4 is connected to the water inlet of the dust collector 2 through a pipeline. In the existing dust removal cycle operation, sewage is usually precipitated in a sedimentation tank. After separating the sewage from the impurities in it, the sewage is then treated or reused. However, the sedimentation time is relatively long, and the sewage reuse cycle is relatively long, resulting in low reuse efficiency. Therefore, in this embodiment, a sludge press is provided. When the sewage enters the sludge press after being treated in the sewage tank, the sludge press squeezes the sewage mixed with dust. During the squeezing process, under the action of the filter plate in the sludge press, the dust is squeezed into a mud cake, and the water in it is squeezed out and falls into the drainage area, and then enters the reclaimed water tank from the drainage port. When no more water can be squeezed out, the squeezing is stopped, the mud cake is centrally recovered, and a new round of operation is restarted. Through the sludge press, the sewage can be quickly treated, separating the dust from the water, without the need to wait for a long time for precipitation in a traditional sedimentation tank before the sewage can be reused, effectively improving the speed of sewage treatment and reuse, and also reducing the sewage discharge to a certain extent, which is conducive to realizing environmental protection production. It can be understood that in a set of systems, multiple dust collectors can be provided and used simultaneously to improve the dust removal efficiency, and the equipment can treat the sewage discharged from multiple dust collectors together;

[0017] In this embodiment, the sewage tank is not only used to store the sewage mixed with dust discharged from the dust collector, but also a sewage treatment device. Specifically, a pH detection device is provided on the sewage tank 3, and an acid-base preparation feeding device is also provided on the sewage tank 3. Since the types of dust adsorbed in the dust collector are various and their pH values are different, the pH of the mixed sewage needs to be detected by the pH detection device. If it is not suitable to directly enter the sludge press, corresponding preparations need to be fed through the acid-base preparation feeding device to neutralize the pH, so as to prevent corrosion of subsequent equipment and damage to the equipment.

[0018] More specifically, a mud cake discharge port is also provided in the sludge press 1. In the sludge press, when the mud cake is squeezed until there is almost no water, the squeezing is stopped, the filter plate is removed, and the mud cake is discharged from the mud cake discharge port. The main components of the remaining mud cake after treatment are coal powder particles and a small amount of water, which can be centrally collected, treated, and reused.

[0019] More specifically, a dust collection pipe 5 is provided on one side of the dust collector 2. The dust collection pipe 5 is communicated with the filter bag of the dust collector 2. The dust collection pipe is used to transport the gas mixed with dust to the dust collector for dust removal, and the gas from which the dust has been removed is discharged from the exhaust port.

[0020] More specifically, a water replenishing port is further provided on the reclaimed water tank 4. When the sewage stored in the reclaimed water tank is insufficient for spray dust removal, water is replenished through the water replenishing port for use.

[0021] The working principle of the present utility model: During operation, dust enters the dust collector 2 through the dust collection pipe 5 and is adsorbed and collected. After spraying, the sewage carrying dust is discharged from the bottom sewage outlet and enters the sewage tank 3. The operator regularly detects the pH value of the sewage in the sewage tank 3 through a pH detection device, and uses an acid-base preparation dosing device to add preparations to neutralize the pH value to prevent the sewage from damaging subsequent equipment. The neutralized sewage enters the sludge press 1 through the drain outlet. The sludge press 1 filters and squeezes the sewage mixed with dust, so that the dust is squeezed into a mud cake, and the water therein is separated and enters the drainage area, and is discharged from the drain outlet into the reclaimed water tank 4 for storage. When the water in the mud cake is basically separated, the squeezing is stopped, the filter plate is taken out, and the mud cake is discharged from the mud cake discharge port for centralized collection. When the dust collector 1 needs to be sprayed for decontamination, the wastewater in the reclaimed water tank 4 can be directly extracted for use, realizing the recycling of wastewater, reducing sewage discharge, and achieving environmental protection operation.

[0022] The above is only used to illustrate the technical solution of the present utility model and not to limit it. Any other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solution of the present utility model shall be covered within the scope of the claims of the present utility model as long as they do not depart from the spirit and scope of the technical solution of the present utility model.

Claims

1. A wet electrostatic precipitator for a coal conveying system with an integrated ash-water separation system, characterized in that: It comprises a mud press (1), a dust collector (2), a sewage tank (3), and a reclaimed water tank (4); the sewage outlet at the bottom of the dust collector (2) is connected to the water inlet of the sewage tank (3) through a pipeline; the drainage outlet of the sewage tank (3) is connected to the water inlet of the mud press (1) through a pipeline; the drainage outlet of the mud press (1) is connected to the water inlet of the reclaimed water tank (4) through a pipeline; and the drainage outlet of the reclaimed water tank (4) is connected to the water inlet of the dust collector (2) through a pipeline.

2. The wet electrostatic precipitator of a coal conveying system with an integrated ash-water separation system according to claim 1, characterized in that: The mud press (1) is also provided with a mud cake discharge port.

3. The wet electrostatic precipitator of a coal conveying system with an integrated ash-water separation system according to claim 1, characterized in that: A dust collection pipe (5) is provided on one side of the dust collector (2), and the dust collection pipe (5) is connected to a filter bag of the dust collector (2).

4. The wet electrostatic precipitator of a coal conveying system with an integrated ash-water separation system according to claim 1, characterized in that: The sewage tank (3) is provided with a pH detection device.

5. The wet electrostatic precipitator of a coal conveying system with an integrated ash-water separation system according to claim 1, characterized in that: The sewage tank (3) is also provided with an acid and alkali preparation delivery device.

6. The wet electrostatic precipitator of a coal conveying system with an integrated ash-water separation system according to claim 1, characterized in that: The intermediate water tank (4) is also provided with a water replenishment port.

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