Wet dust collector with water circulation and water treatment functions

Abstract

The invention discloses a wet dust collector with water circulation and water treatment, the wet dust collector comprises a dust collector body, the dust collector body comprises an air inlet chamber, a water storage precipitation hopper and an air exhaust chamber, the air inlet chamber is provided with a plurality of aeration pipes and a dust collection spray pipe, the water storage precipitation hopper is internally provided with a circulation area and a precipitation area, and the air exhaust chamber is provided with a plurality of aeration pipes and a plurality of dust collection spray pipes. The wall surface of the circulating area is provided with a channel communicated with the settling area, the first end of the aeration pipe is communicated with the air inlet chamber, the second end of the aeration pipe extends into the settling area of the water storage settling hopper, the exhaust chamber is connected to the top of the water storage settling hopper, the inlet end of a circulating water pump is connected to the circulating area, and the outlet end of the circulating water pump is connected to the circulating area. The outlet end of the circulating water pump is connected to the dust removal spraying pipe of the air inlet chamber, and a mud valve is arranged at the bottom of the water storage precipitation hopper. The circulating area and the settling area are formed in the water storage settling hopper for primary water treatment, water in the circulating area is used for circulating spraying dust removal, dust removal water is saved, and the load of a water treatment system is reduced.

Description

Technical Field

[0001] The invention relates to a wet dust collector and belongs to the technical field of dust removal equipment. Background Art

[0002] In the field of industrial dust removal, mainstream wet dust collectors include spray dust removal, water bath dust removal, and comprehensive types. However, all types of wet dust collectors have two significant defects: first, the amount of water used in the wet dust removal process is huge, which puts heavy pressure on the user's water supply network; second, the water after dust removal is mixed with dust particles, and the dust particles will gradually accumulate and increase. The stable operation of the equipment is highly dependent on the powerful processing capacity of the water treatment system. In the renovation of old factory areas, the application of wet dust collectors accounts for more than half, but the water treatment system capacity of old factory areas is usually difficult to meet the needs. Summary of the invention

[0003] In view of the above-mentioned defects of the prior art, the task of the present invention is to provide a wet dust collector with water circulation and water treatment, so as to solve the problems of large water consumption of the wet dust collector and difficulty in subsequent water treatment.

[0004] The technical solution of the present invention is as follows: A wet dust collector with water circulation and water treatment, comprising a dust collector body, wherein the dust collector body comprises an air inlet chamber, a water storage and sedimentation hopper and an exhaust chamber, the air inlet chamber is provided with a plurality of aeration pipes and dust removal spray pipes, a circulation area and a sedimentation area are provided in the water storage and sedimentation hopper, the wall of the circulation area is provided with a channel connected to the sedimentation area, the first end of the aeration pipe is connected to the air inlet chamber, the second end of the aeration pipe extends into the sedimentation area of ​​the water storage and sedimentation hopper, the exhaust chamber is connected to the top of the water storage and sedimentation hopper, the inlet end of the circulating water pump is connected to the circulation area, the outlet end of the circulating water pump is connected to the dust removal spray pipe of the air inlet chamber, and a mud discharge valve is provided at the bottom of the water storage and sedimentation hopper.

[0005] Furthermore, an inclined sedimentation tube group is provided at the upper part of the water storage sedimentation hopper below the second end of the aeration tube, and the inclined sedimentation tube group includes a plurality of inclined sedimentation tubes.

[0006] Furthermore, the height of the channel is not higher than the upper tube end of the sedimentation inclined tube.

[0007] Furthermore, the channel is provided with a filter.

[0008] Furthermore, the air inlet chamber and the exhaust chamber are arranged side by side and are located above the water storage sedimentation hopper, the aeration pipe is arranged vertically, and aeration holes are opened on the pipe wall of the second end of the aeration pipe.

[0009] Furthermore, an air inlet is provided on a side wall of the air inlet chamber, a bottom plate of the air inlet chamber is inclined upward from the air inlet toward the inside of the air inlet chamber, and a first end of the aeration pipe is connected to the bottom plate of the air inlet chamber.

[0010] Furthermore, the wet dust collector comprises a mud scraper, and the inlet of the mud scraper is connected to the mud discharge valve.

[0011] Furthermore, the lower portion of the water storage sedimentation hopper is in the shape of a cone that tapers downward, and a rotation resistance sensor for detecting the amount of mud is provided on the side of the cone.

[0012] Furthermore, the exhaust chamber is provided with a demister.

[0013] Furthermore, the exhaust chamber is provided with a cleaning spray pipe, and the cleaning spray pipe is located above and below the demister.

[0014] The advantages of the present invention compared with the prior art are: The present invention respectively sets a circulation area and a sedimentation area in the water storage sedimentation hopper. The dust removal water in the sedimentation area enters the circulation area through the channel, and then is sprayed for dust removal again through the circulating water pump, thereby forming preliminary water treatment inside the dust collector body and recycling the dust removal water, reducing the load of the external water treatment system, alleviating the demand for the expansion of the water treatment system for the wet dust removal transformation, and facilitating the promotion and application of wet dust removal.

[0015] The present invention uses a sedimentation inclined tube group to isolate the fluctuation of the upper water body caused by the impact of smoke, and significantly increases the sedimentation area, greatly enhancing the sedimentation efficiency. A filter is set in the channel between the circulation area and the sedimentation area to further isolate the water body fluctuation. In addition, the height of the channel is set not higher than the upper pipe end of the sedimentation inclined tube, which reduces the particles caused by water body fluctuations entering the circulation area, improves the water quality of the circulation area, can reduce the problem of blockage of the dust removal spray pipe, and can also ensure the effect of spray dust removal. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of a wet dust collector with water circulation and water treatment according to an embodiment. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the embodiments, but are not intended to limit the present invention.

[0018] Please combine Figure 1 As shown, this embodiment involves a wet dust collector with water circulation and water treatment, including a dust collector body and a closed box chain scraper 1. The dust collector body mainly includes a three-part chamber structure, namely an air intake chamber 2, a water storage sedimentation hopper 3 and an exhaust chamber 4.

[0019] The air inlet chamber 2 is provided with an air inlet 2a for receiving dusty flue gas. In this embodiment, the air inlet 2a is provided on a side wall of the air inlet chamber 2. A dust removal spray pipe 5 is provided inside the air inlet chamber 2. The dust removal spray pipe 5 is used to spray spray liquid to absorb dust in the flue gas. A plurality of aeration pipes 6 are also provided in the air inlet chamber 2. The first end of the aeration pipe 6 is provided in communication with the air inlet chamber 2. The second end of the aeration pipe 6 is located in the water storage sedimentation hopper 3. The wall of the second end of the aeration pipe 6 is provided with dense aeration holes. The dusty flue gas sprayed enters the water storage sedimentation hopper 3 in the form of small bubbles through the aeration pipe 6 from the aeration holes. The flue gas entering from the side and the spray liquid, the aeration small bubbles and the lower water body can have more contact to improve the dust removal efficiency. Specifically, the aeration pipe 6 is vertically arranged, the bottom plate 2b of the air inlet chamber 2 is inclined upward from the air inlet 2a to the inside of the air inlet chamber 2, and the first end of the aeration pipe 6 is connected to the bottom plate 2b of the air inlet chamber 2. In this way, in addition to the dust-containing flue gas being able to enter the water storage sedimentation hopper 3 from the aeration holes through the aeration pipe 6 in the form of small bubbles, the spray liquid that has sprayed and adsorbed the dust can also enter the water storage sedimentation hopper 3 after being washed in a water bath through the aeration pipe 6.

[0020] The exhaust chamber 4 is arranged side by side with the air inlet chamber 2. The water storage and settling hopper 3 is connected to the lower part of the air inlet chamber 2 and the exhaust chamber 4. The water storage and settling hopper 3 is connected to the air inlet chamber 2 through the aeration pipe 6. The exhaust chamber 4 has no bottom plate, so the water storage and settling hopper 3 is directly connected to the exhaust chamber 4. The air inlet chamber 2 and the exhaust chamber 4 are arranged side by side and located above the water storage and settling hopper 3, so that the appearance of the entire wet dust collector is close to the appearance and layout of most existing dust collectors, which is convenient for replacing and modifying the dust collector in the original dust removal system and reducing the layout changes of supporting equipment.

[0021] The lower part of the water storage sedimentation hopper 3 is a tapered shape that tapers downward, and a rotation resistance sensor 7 for detecting the amount of mud is provided on the side of the cone. When the wet dust collector is in operation, circulating water will be injected into the water storage sedimentation hopper 3, and the water surface will be higher than the height of the second end of the aeration pipe 6. The dust-containing flue gas that has been sprayed is further adsorbed by the circulating water through the aeration pipe 6, and then enters the exhaust chamber 4. The lower conical structure of the water storage sedimentation hopper 3 can gather the sludge in the circulating water, and finally all the sludge is concentrated and gathered at the tip of the cone bottom. When the rotation resistance sensor 7 measures that the rotation torque has risen to a certain degree, it can be determined that there is a lot of sludge in the water storage sedimentation hopper 3, and the mud discharge valve 8 set at the bottom of the water storage sedimentation hopper 3 is started to discharge the mud. In this embodiment, the mud discharge valve 8 is also connected to the closed box chain scraper 1. When the system needs to discharge mud, the mud discharge valve 8 and the scraper 1 are opened synchronously. At this time, the system can smoothly remove the sludge and directly load it to the transfer vehicle. In other embodiments, the outlet of the closed box chain scraper 8 may also be equipped with a filter press or other equipment for further dehydration treatment.

[0022] In order to save water for dust removal, a certain space is separated by a partition 9 on the upper part of the water storage sedimentation hopper 3 as the circulation area 3a, and the rest of the space is used as the sedimentation area 3b. The partition 9, which is the wall of the circulation area 3a, is provided with a channel 9a connecting the circulation area 3a and the sedimentation area 3b. The circulating water in the water storage sedimentation hopper 3 enters the circulation area 3a and the sedimentation area 3b through the channel 9a. The position where the second end of the aeration pipe 6 is immersed in the water storage sedimentation hopper 3 is the sedimentation area 3b. In addition, a circulating water pump 10 is provided. The inlet end of the circulating water pump 10 is connected to the circulation area 3a through a pipeline, and the outlet end of the circulating water pump 10 is connected to the dust removal spray pipe 5 of the air intake chamber 2. In this way, the circulating water in the circulation area 3a is extracted by the circulating water pump 10 for spraying, thereby reducing the overall amount of water for dust removal.

[0023] As a preferred embodiment, in this embodiment, a sedimentation inclined tube group 11 is provided at the upper part of the water storage sedimentation hopper 3 below the second end of the aeration tube 6. The sedimentation inclined tube group 11 includes a plurality of inclined sedimentation inclined tubes. Preferably, the sedimentation inclined tubes are densely arranged. These sedimentation inclined tubes form a dense sedimentation channel. On the one hand, they can block the water disturbance caused by aeration of the aeration tube 6, reduce the disturbance of the sediment in the lower part of the water storage sedimentation hopper 3, reduce the dust content of the water in the circulation area 3a, and reduce the blockage problem of the dust removal spray pipe 5. On the other hand, it can increase the contact surface with the dust particles in the water body, increase the sedimentation area, and enhance the sedimentation efficiency. In order to further improve the water quality of the circulation area 3a, the position height of the channel 9a on the partition 9 of the circulation area 3a is not higher than the upper tube end of the sedimentation inclined tube, and a filter screen is provided in the channel 9a, so that the water that has not been stably precipitated by the sedimentation inclined tube will not directly enter the circulation area 3a. In addition, the filter screen can filter large particles of solids and further isolate water fluctuations.

[0024] The flue gas discharged from the circulating water body after aeration (the dust content in the flue gas is very low at this time) enters the exhaust chamber 4. The exhaust chamber 4 is provided with a folding plate demister 12, and a cleaning spray pipe 13 is provided above and below the folding plate demister 12. The cleaning spray pipe 13 is used to spray clean water on the folding plate demister 12, and the cleaning spray pipe 13 is generally connected to the new water pipeline 14. The demister is flushed in an intermittent mode, and the water consumption is negligible. The flushing water also serves as the water replenishment of the system. The interval length and duration of the flushing can be flexibly adjusted to accurately adapt to the water replenishment needs of the system. The S-shaped blades of the folding plate demister 12 form a curved flue, and a water film is attached to the surface of the blades. When the flue gas flows through the demister, the dust hits the S-shaped blade wall due to inertia and is adsorbed by the water film, thereby achieving dust removal again, further improving the overall dust removal efficiency, and the final exhaust gas is discharged from the air outlet 4a at the top of the exhaust chamber 4.

Claims

1. A wet dust collector with water circulation and water treatment, comprising a dust collector body, characterized in that: The dust collector body includes an air inlet chamber, a water storage and sedimentation hopper and an exhaust chamber. The air inlet chamber is provided with a plurality of aeration pipes and dust removal spray pipes. The water storage and sedimentation hopper is provided with a circulation area and a sedimentation area. The wall of the circulation area is provided with a channel connected to the sedimentation area. The first end of the aeration pipe is connected to the air inlet chamber, and the second end of the aeration pipe extends into the sedimentation area of ​​the water storage and sedimentation hopper. The exhaust chamber is connected to the top of the water storage and sedimentation hopper, the inlet end of the circulating water pump is connected to the circulation area, and the outlet end of the circulating water pump is connected to the dust removal spray pipe of the air inlet chamber. A mud discharge valve is provided at the bottom of the water storage and sedimentation hopper.

2. The wet dust collector with water circulation and water treatment according to claim 1 is characterized in that: The upper part of the water storage sedimentation hopper is located below the second end of the aeration pipe and is provided with a sedimentation inclined tube group, and the sedimentation inclined tube group includes a plurality of inclined sedimentation inclined tubes.

3. The wet dust collector with water circulation and water treatment according to claim 1 or 2, characterized in that: The height of the channel is not higher than the upper tube end of the sedimentation inclined tube.

4. The wet dust collector with water circulation and water treatment according to claim 3 is characterized in that: The channel is provided with a filter.

5. The wet dust collector with water circulation and water treatment according to claim 1 is characterized in that: The air inlet chamber and the exhaust chamber are arranged side by side and are located above the water storage sedimentation hopper. The aeration pipe is arranged vertically, and an aeration hole is provided on the pipe wall of the second end of the aeration pipe.

6. The wet dust collector with water circulation and water treatment according to claim 5, characterized in that: The side wall of the air inlet chamber is provided with an air inlet, the bottom plate of the air inlet chamber is arranged to be inclined upward from the air inlet toward the inside of the air inlet chamber, and the first end of the aeration pipe is connected to the bottom plate of the air inlet chamber.

7. The wet dust collector with water circulation and water treatment according to claim 1, characterized in that: The wet dust collector comprises a mud scraper, and the inlet of the mud scraper is connected to the mud discharge valve.

8. The wet dust collector with water circulation and water treatment according to claim 1, characterized in that: The lower part of the water storage sedimentation hopper is in the shape of a cone which tapers downwards, and the side of the cone is provided with a rotation resistance sensor for detecting the amount of mud.

9. The wet dust collector with water circulation and water treatment according to claim 1, characterized in that: The exhaust chamber is provided with a demister.

10. The wet dust collector with water circulation and water treatment according to claim 9, characterized in that: The exhaust chamber is provided with a cleaning spray pipe, and the cleaning spray pipe is located above and below the demister.

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