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CN-121988456-A - Spray washing wet electrostatic precipitator and application method thereof

CN121988456ACN 121988456 ACN121988456 ACN 121988456ACN-121988456-A

Abstract

The invention relates to the field of electrostatic dust collection equipment, in particular to a spray washing wet electrostatic dust collector and a use method thereof, wherein the spray washing wet electrostatic dust collector comprises a machine shell and a rectangular square cylinder structure which extends vertically and is provided with an upper opening and a lower opening; the solar cell comprises a shell, a cathode plate, an anode plate, a variable air inlet mechanism and a variable air inlet mechanism, wherein the cathode plate is horizontally paved at the bottom of the shell, air distribution holes are formed in the cathode plate, the anode plate is of a multi-layer nested structure and is vertically arranged in the shell, the anode plate is of a vertically extending wave-shaped structure, and the variable air inlet mechanism is arranged on the side wall of the shell between the cathode plate and the anode plate. The anode strips are arranged into a multilayer nested vertical wavy structure, the adsorption area of the anode strips is increased, the contact probability and adsorption efficiency of dust and the anode strips are improved, the synchronous actions of gathering the cover surfaces of the variable air inlet mechanism and gathering of the adjusting frame are realized, the opening and closing area size of the spray head is consistent with the adjusting action of the area size of the air inlet below, spraying according to the requirement is realized, and the dust removal efficiency and the resource utilization rate are kept to reach an equilibrium state.

Inventors

  • CHEN HANG
  • QIU YONGHUI
  • HUANG TINGYI
  • YU BAIJUN
  • SI SHANGFENG

Assignees

  • 浙江远腾环保科技有限公司

Dates

Publication Date
20260508
Application Date
20260331

Claims (10)

  1. 1. A spray-washing wet electrostatic precipitator, comprising: The shell (1) is vertically extended and is of a rectangular square cylinder structure with an upper opening and a lower opening; A cathode plate (3) horizontally paved at the bottom of the shell (1), and air distribution holes (301) are formed in the cathode plate (3); the anode plates (4) are of a multi-layer nested structure and are vertically arranged in the shell (1), and the anode plates (4) are of a vertically extending wave-shaped structure; the variable air inlet mechanism (5) is arranged on the side wall of the shell (1) between the cathode plate (3) and the anode plate (4); A plurality of spraying pipes (6) transversely arranged along the top of the shell (1), and adjusting frames (7) which are in one-to-one correspondence with the spraying pipes (6) and are arranged above the spraying pipes (6); the main shaft (8) is vertically arranged at the center of the shell (1), and a driving part (9) which is arranged above the shell (1) and is used for driving the main shaft (8) to rotate; The variable air inlet mechanism (5) comprises four groups of rolling frames, four cover surfaces (502) which are arranged in a rolling frame in a winding mode, a rectangular air inlet is formed in the center of each four cover surfaces (502), a pull rope (802) used for pulling the cover surfaces (502) to stretch out to change the area of the air inlet and a pull belt (804) used for pulling the adjusting frame (7) are arranged on the main shaft (8).
  2. 2. The wet electrostatic precipitator for spray washing according to claim 1, wherein the winding frame comprises a side rail (501) with a C-shaped frame shape, a winding shaft (503) is rotatably arranged in the side rail (501), a winding drum (504) for winding a cover surface (502) is sleeved outside the winding shaft (503), a coil spring (503 a) for supporting the winding drum (504) is fixed on the winding shaft (503), a pressing strip (505) is fixed on the unwinding side of the cover surface (502), the pulling rope (802) is connected with the pressing strip (505), and the pulling rope (802) is wound when the main shaft (8) rotates so as to pull four cover surfaces (502) to gather towards the center.
  3. 3. The spray washing wet electrostatic precipitator according to claim 2, wherein a movable hole (601) is vertically formed in the spray pipe (6), a movable pipe (602) is arranged in the movable hole (601) in a penetrating manner, a spray head (603) is communicated with the bottom of the movable pipe (602), a side hole (602 a) is formed in the side wall of the bottom end of the movable pipe (602), the spray pipe (6) is communicated with the spray head (603) through the side hole (602 a), a wheel carrier (604) is arranged at the top of the movable pipe (602), a pressing wheel (606) is arranged on the wheel carrier (604), and a pressure spring (605) for keeping the movable pipe (602) tightly supported upwards is arranged between the wheel carrier (604) and the spray pipe (6).
  4. 4. A spray washing wet electrostatic precipitator according to claim 3, in which the said regulating frame (7) is slidably inserted through the said casing (1), a guiding section (701) extending upwards is provided at the inner end of the said regulating frame (7), a pull ring (702) connected with a pull belt (804) is provided at the inner side of the guiding section (701), the said pull belt (804) is wound when the said main shaft (8) rotates, so as to pull the said regulating frame (7) to gather towards the centre, the said pressing wheel (606) in the covered area of the said regulating frame (7) is pressed down, the said pressing spring (605) is compressed to drive the said movable pipe (602) to go down, the said side hole (602 a) is pulled out downwards from the said spray pipe (6), so as to close the said spray head (603).
  5. 5. The wet electrostatic precipitator for spray washing according to claim 4, further comprising a top cover (2) covering the top of the casing (1), the driving part (9) being fixed above the top cover (2).
  6. 6. The wet electrostatic precipitator for spray washing according to claim 5, wherein the anode strips (4) are of a vertically extending wave-shaped structure, and the spray heads (603) below the spray pipes (6) are in one-to-one correspondence with the intervals formed by the adjacent anode strips (4).
  7. 7. The spray washing wet electrostatic precipitator according to claim 6, wherein the top cover (2) is further provided with a waste gas cover (10) communicated with the casing (1), and the waste gas cover (10) is communicated with a waste discharge port (201) on the top cover (2) for discharging purified gas.
  8. 8. The wet electrostatic precipitator for spray washing according to claim 7, wherein the bottom of the casing (1) is communicated with an air inlet cover (11), the air inlet cover (11) is of a downward gathered square cone structure, an air inlet hole (11 a) and a water outlet hole (11 b) are formed in the bottom end opening of the air inlet cover (11), the air inlet hole (11 a) is located on the side wall, and a rack (12) is arranged below the casing (1).
  9. 9. The spray washing wet electrostatic precipitator according to claim 8, wherein adjustment tank (101) and slide hole (103) have been seted up to the lateral wall of casing (1), adjustment frame (7) slip runs through adjustment tank (101), the inside rack (102) that are provided with support anode strip (4) of casing (1), adjustment frame (7) outer tip is fixed with supporting lug (703), is fixed with on this supporting lug (703) and wears to locate slide bar (704) in slide hole (103), slide bar (704) outside cover is equipped with spring (705) that keep adjustment frame (7) outwards prop tightly.
  10. 10. A method of using a spray-washed wet electrostatic precipitator according to claim 9, comprising the steps of: s1, starting the driving part (9) to drive the main shaft (8) to rotate according to the air inlet demand of waste gas to be treated; S2, the main shaft (8) winds the pull rope (802), pulls four cover surfaces (502) of the variable air inlet mechanism (5) to gather towards the center, and adjusts the size of a central rectangular air inlet; S3, synchronously winding the pull belt (804) by the main shaft (8), pulling a plurality of adjusting frames (7) to gather towards the center, and pressing the pinch rollers (606) of the covering area of the adjusting frames (7) to enable the spray heads (603) of the corresponding area to be closed and synchronously keeping the spray heads (603) matched with the area of the air inlet in an opening state; s4, dust-containing waste gas enters the shell (1) from the air inlet cover (11), flows upwards through the air distribution holes (301) of the cathode plate (3), and under the action of an electric field, charged dust is adsorbed onto the anode plates (4) in the shape of multiple layers of waves; s5, starting the spray pipe (6), spraying water to the anode piece (4) through the spray nozzle (603) in the starting state, enabling the sprayed water to flow along the surface of the wavy anode piece (4), flushing adsorbed dust and forming slurry, and discharging the slurry from the water outlet hole (11 b); S6, discharging the purified gas through the waste gas cover (10); and S7, when the air inlet quantity changes, repeating the steps S1-S3, and synchronously adjusting the size of the air inlet and the opening and closing area of the spray head (603) to match the air inlet quantity and avoid spray water waste.

Description

Spray washing wet electrostatic precipitator and application method thereof Technical Field The invention relates to the field of electrostatic dust collection equipment, in particular to a spray washing wet electrostatic dust collector and a use method thereof. Background The wet electrostatic precipitator is used as an efficient terminal treatment device for atmospheric pollutants, is widely applied to industries such as electric power, metallurgy, chemical industry, building materials and the like, is mainly used for capturing fine particulate matters, aerosols, acid mist and other pollutants in dust-containing waste gas, and is one of core equipment for controlling PM2.5, heavy metals and toxic and harmful gas emission. Compared with a dry electrostatic precipitator, the dust collector can collect dust in an electric field and continuously wash the polar plate through water liquid in a spraying and washing mode, so that the phenomena of secondary dust lifting and back corona are avoided, the dust collector is particularly suitable for treating the waste gas working conditions of high-humidity, high-specific resistance or viscous dust, and the dust collector occupies an irreplaceable position in an ultra-low emission reconstruction project. In the wet electrostatic precipitator in the prior art, a dust collection unit of a core of the wet electrostatic precipitator generally adopts a structure of matching a straight anode plate with a cathode wire. In the use process of the design, when dust is charged in an electric field, the dust only moves towards the anode plate by virtue of coulomb force, the surface of the straight anode plate is smooth, the dust only can collide with the straight surface of the anode plate in ascending airflow, the effective adsorption area is small, part of fine dust is easy to escape along with the airflow, and the removal rate is poor. Meanwhile, in the pole plate flushing link, after sprayed water is sprayed out from the top, the sprayed water can quickly slide down along the surface of the straight-plate anode plate or the gap between adjacent pole plates, the contact time with the pole plates is short, absorbed dust cannot be fully dissolved and taken away, a large amount of water resources are wasted, a hard scaling layer is formed on the surface of the pole plates due to incomplete dust flushing, and the electric field strength is reduced, the equipment resistance is increased and the dust removal efficiency and the system stability are seriously affected after long-term operation. In order to solve the problems, the adsorption area is enlarged by increasing the number of anode plates, but the equipment volume and the cost are greatly increased and limited by the electric field spacing, the lifting effect is limited, the flushing coverage rate is improved by optimizing the arrangement of the spraying pipelines, but the static layout is mostly adopted, and the real-time adjustment can not be carried out according to the dynamic change of the actual working condition. In the aspect of air inlet regulation, the air inlet of the existing wet electrostatic precipitator is mostly of a fixed size design, and cannot be flexibly regulated according to fluctuation of waste gas quantity. When the low-load waste gas is treated, the air flow is unevenly distributed in the equipment due to the oversized air inlet, the flow speed of the edge area is too high, the dust retention time is insufficient, so that the trapping efficiency is reduced, and under the high-load working condition, the polar plate is not cleaned cleanly due to the insufficient flow of the fixed spraying system. In addition, the existing spraying system and the air inlet system are mutually independent, and the spraying area and the flow rate cannot be matched with the air inlet area and the flow rate. When the air inlet is contracted, if the whole area is still kept to spray, a large amount of spray water can directly fall into the gap of the polar plate, and the spray water is discharged from the equipment without being fully contacted with dust, so that not only is the water resource greatly wasted, but also the burden of subsequent wastewater treatment can be increased, and when the air inlet is oversized, the corresponding spray area is increased, so that the water is wasted, and the use is inconvenient. Disclosure of Invention The invention aims to solve the problems and provide a spray washing wet electrostatic precipitator and a use method thereof, wherein anode plates are arranged into a multi-layer nested vertical wave-shaped structure, the adsorption area of the anode plates is increased, the contact probability and adsorption efficiency of dust and the anode plates are improved, the synchronous action of the gathering of the cover surface of a variable air inlet mechanism and the gathering of an adjusting frame is realized, the size of an opening and closing area of a spray head is consistent with the size