CN112108268A - Wet-type electric precipitation demister, treatment method and application thereof - Google Patents

Wet-type electric precipitation demister, treatment method and application thereof Download PDF

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Publication number
CN112108268A
CN112108268A CN201910529026.8A CN201910529026A CN112108268A CN 112108268 A CN112108268 A CN 112108268A CN 201910529026 A CN201910529026 A CN 201910529026A CN 112108268 A CN112108268 A CN 112108268A
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China
Prior art keywords
discharge
wet
electric field
electrode
deflection
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CN201910529026.8A
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Chinese (zh)
Inventor
单广斌
李贵军
黄贤滨
屈定荣
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China Petroleum and Chemical Corp
Sinopec Qingdao Safety Engineering Institute
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China Petroleum and Chemical Corp
Sinopec Qingdao Safety Engineering Institute
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Priority to CN201910529026.8A priority Critical patent/CN112108268A/en
Publication of CN112108268A publication Critical patent/CN112108268A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION 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
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/02Plant or installations having external electricity supply
    • B03C3/16Plant or installations having external electricity supply wet type
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION 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
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34Constructional details or accessories or operation thereof
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION 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
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34Constructional details or accessories or operation thereof
    • B03C3/36Controlling flow of gases or vapour
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION 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
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34Constructional details or accessories or operation thereof
    • B03C3/38Particle charging or ionising stations, e.g. using electric discharge, radioactive radiation, flames
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION 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
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34Constructional details or accessories or operation thereof
    • B03C3/40Electrode constructions
    • B03C3/41Ionising-electrodes

Abstract

The invention discloses a wet-type electric precipitation demister, a treatment method and application thereof, and belongs to the technical field of flue gas treatment. The problems that a traditional dust removal demister is prone to generating cathode line breakage, uneven electric field, unstable voltage, low long-period operation reliability and the like are solved. The smoke-gas separation device comprises a shell, wherein a smoke-gas inlet is formed in the bottom of the shell, a smoke-gas outlet is formed in the top of the shell, and an airflow distribution assembly is arranged in the shell close to the smoke-gas inlet; a charge discharge area and a deflection electric field area are sequentially arranged above the airflow distribution assembly, the charge discharge area and the deflection electric field area are independently arranged, rotating blades are arranged in the charge discharge area, and when airflow passes through the rotating blades, the rotating blades rotate to enable the discharge to be uniform; the deflecting electric field area is composed of a deflecting electric field electrode group and a deflecting electric field power supply. The invention solves the problems of easy cathode wire breakage, uneven electric field, unstable voltage and low reliability by changing the traditional electrode form, and prolongs the service life of the equipment.

Description

Wet-type electric precipitation demister, treatment method and application thereof
Technical Field
The invention relates to the technical field of flue gas treatment, in particular to a dust and mist removing device suitable for flue gas treatment in industries such as petroleum, chemical engineering, smelting and the like.
Background
The wet electric dust collector and demister can remove harmful substances such as dust, acid mist, water drops, aerosol, odor, PM2.5 and the like in moisture-containing gas, and is ideal equipment for treating atmospheric dust pollution. Along with the improvement of the environmental protection requirement, the electric precipitation demisting device is popularized and applied. The wet electric dedusting and demisting process includes: corona discharge of electrode, charging of particles, moving under the action of electric field, and trapping and washing of dust collecting electrode.
Researchers have carried out continuous improvement to wet-type electrostatic precipitator defroster among the prior art, and main relevant research has:
application number 201410633638.9 provides a wet-type electrostatic precipitator, realizes that electrostatic precipitation combines together with wet dedusting through setting up adsorption plate and wet dedusting cavity to set up the adsorption plate into zigzag shape with the area of contact who improves gas and adsorption plate, improved dust collection efficiency.
Application number 201510893320.9 provides a wet-type electrostatic precipitator, and it has mainly add plate-type anode system in the below of original tubular anode system, and extension electric field length makes the dwell time of flue gas in the electric field longer, and then improves dust collection efficiency.
Application No. 201610439156.9 provides an automatic centrifugal wet electrostatic precipitator, which effectively combines a centrifugal precipitation method and a wet electrostatic precipitation method to improve the precipitation efficiency.
Application No. 201710335900.5 provides a wet-type electrostatic precipitator, mainly through setting up vortex shape air current passageway, increase the area of contact with the negative pole line when reducing the gas velocity.
Application number 201711480635.6 provides an electric dust collector, mainly sets up and sprays mechanism, honeycomb dust removal mechanism and secondary wiper mechanism, realizes cleaing away to a small amount of neutral dust and the fog granule of honeycomb holes internal surface adnexed.
Application number 201721258453.X provides a wet-type electric precipitator, which is mainly characterized in that a multilayer demister is arranged at an outlet to collect droplets with different particle diameters in a layering manner.
However, although the research on the dust and mist eliminator in the related research has made certain progress, the current wet electrostatic precipitator still has some disadvantages:
first, long-period operation reliability: for example: the cathode wire is broken to cause local ignition and cause unstable voltage and even local breakdown;
second, the traditional wire-shaped electrode and rod-shaped electrode have uneven discharge;
thirdly, the corona ionization and the deflection electric field supply power for the same time, and in the same space, the discharge and the deflection have mutual interference;
fourthly, the traditional electrode is generally longer, about 4m, high in installation concentricity requirement and easy to generate uneven electric field and partial discharge;
fifthly, for a strong corrosion environment, the requirement on corrosion resistance of the electrode wire material is high, and the cost is high. Meanwhile, the influence of the electric dust removal equipment on the corrosion of the tower body equipment connected with the lower part is not considered.
In summary, with the pursuit of environmental protection, the operation of environmental protection equipment has been linked to the operation of main devices, and becomes a short plate of long period of the device, so that there is an urgent need for a dust and mist remover which can operate stably for long period.
Disclosure of Invention
The invention aims to provide a wet-type electric precipitation demister, a treatment method and application thereof, which solve the problems of breakage of a cathode wire, non-uniform electric field, unstable voltage, low long-period operation reliability and the like of the traditional electric precipitation demister.
In order to achieve the purpose, the main technical problem to be overcome by the invention is how to set a charge part and a deflection electric field, solve the technical problems that the discharge is uneven and local high-voltage breakdown is easy to occur, prolong the service life of equipment and meet the requirement of long-period stable operation.
In order to solve the technical problem, one of the tasks of the invention is to provide a wet-type electric precipitation demister, which adopts the following technical scheme:
the utility model provides a wet-type electric precipitation defroster, its includes the casing, the casing have flue gas entry end and flue gas exit end, be provided with the air current distribution subassembly in the casing inside near the flue gas entry end, the air current distribution subassembly be used for with pending flue gas distribution even.
In a preferred embodiment of the present invention, a charge discharge region and a deflection electric field region are sequentially disposed above the gas flow distribution assembly.
As another preferable aspect of the present invention, the charge-discharge region and the deflection electric field region are independently arranged, and a rotation device is arranged in the charge-discharge region, and when an air flow passes through the rotation device, the rotation device rotates to make the discharge uniform.
Furthermore, the deflecting electric field area is composed of a deflecting electric field electrode group and a deflecting electric field power supply.
Furthermore, the wet-type electric precipitation demister further comprises a washing mechanism, and the washing mechanism is located above the deflection electric field area.
Further, an inner cofferdam and a condensate discharge port for collecting and discharging corrosive condensate are arranged on the shell near the flue gas inlet end.
Further preferably, the charge-discharge area comprises a discharge rotating electrode, a discharge fixed electrode and a discharge area power supply.
Further preferably, the discharge rotating electrode and the discharge fixed electrode are close to the gas flow distribution assembly, and the discharge rotating electrode is located inside the discharge fixed electrode.
Further preferably, the rotating device is a rotatable fan blade, and the rotating device drives the rotating electrode to rotate when the air flow passes through the rotating device.
Further preferably, the deflection electrodes of the deflection electric field electrode group are uniformly distributed in the vertical direction inside the housing.
Further preferably, the flushing mechanism includes a nozzle and a flushing water pipe, the flushing water pipe providing a water source into the nozzle.
Further preferably, the nozzles are distributed right above the deflection electrode group, and a plurality of nozzles are arranged.
Preferably, the cathode of the discharge rotating electrode is a rod-shaped electrode, discharge prickles are fixed on the rod-shaped electrode, and the fan blades are located below the discharge prickles.
Preferably, the voltage of the power supply in the discharge region is 1000-50000V, and the voltage of the power supply in the deflection electric field region is 1000-50000V.
More preferably, the pitch between adjacent deflection electrodes is 10 to 60 mm.
Preferably, 2-10 blades of the fan blade are selected, and the length of the discharge prickle is 15-100 mm.
The invention also provides a treatment method of the wet-type electric precipitation demister, which sequentially comprises the following steps:
a. the flue gas enters from a flue gas inlet end, and after being uniformly distributed through the airflow distribution assembly, the flue gas enters into a gap between the discharge rotating electrode and the discharge fixed electrode, the discharge rotating electrode is driven to rotate through disturbed airflow, and the passing airflow generates local turbulence;
b. providing direct current high voltage through a power supply in a discharge area, generating corona discharge between a discharge rotating electrode and a discharge fixed electrode, enabling liquid drops or particles in air flow to enter a deflection electric field electrode group along with the air flow after the liquid drops or the particles are charged, providing direct current voltage through a bias electric field power supply, forming a deflection electric field between a positive electrode and a negative electrode of a motor group, and deflecting the charged particles under the action of the electric field;
c. and the flue gas after dust removal is discharged out of the equipment through a flue gas outlet.
Preferably, the surface of the dust collecting electrode is intermittently cleaned by washing water after step c.
Preferably, the washing water is intermittently sprayed from the washing water pipeline and the nozzles at the upper parts of the deflection field electrode groups, and liquid drops on the wall of the washing water are intercepted and collected by the inner weir and then are discharged out of the equipment through the condensate discharge port.
The invention also provides application of the wet-type electric precipitation demister.
An application of wet-type electric dust-removing demister in the fume treatment of petroleum, chemical and smelting devices.
Compared with the prior art, the invention has the following beneficial technical effects:
(1) the mode of independent charge and deflection electric field is adopted, no mutual influence exists, the length of the electrode is reduced, and the reliability is improved.
(2) The discharge part adopts a rotating electrode, so that the discharge is uniform and the charge efficiency is high.
(3) The deflection electric field part does not need to discharge, and the electric field requirement can be met by adjusting the electrode distance, so that the high voltage requirement is reduced, and the voltage and the electric field are stable. The dust collecting pole does not need prickles or fins, thereby reducing the adhesion of dust and dirt, being convenient for cleaning and reducing the manufacturing cost. The reduction of the electrode distance reduces the deflection stroke of charged liquid drops/particles, improves the efficiency and reduces the energy consumption. By changing the traditional electrode form, the problems of easy spark generation and unstable voltage are solved, and the service life of the equipment is prolonged.
(4) The inner surrounding weir and the condensate discharge port are used for collecting and discharging corrosive condensate, trapped high-corrosive condensate can be discharged in time, and corrosion of lower equipment is reduced.
In conclusion, the wet-type electric precipitation demister has the characteristics of uniform discharge, high charge efficiency, high adaptability, stable voltage and reduction of equipment corrosion, and can meet the requirement of stable operation in a long period (4 years).
Drawings
The invention is further described below with reference to the accompanying drawings:
FIG. 1 is a schematic structural diagram of a wet-type electric precipitation demister according to the present invention;
FIG. 2 is a schematic structural view of a discharge rotating electrode of the present invention, mainly illustrating a rotatable blade portion;
in the figure: 1. flue gas entry, 2, air current distribution subassembly, 3, discharge rotating electrode, 4, discharge fixed electrode, 5, electric field deflection electrode group, 6, exhanst gas outlet, 7, wash water pipeline, 8, nozzle, 9, electric field deflection power supply, 10, discharge area power supply, 11, interior weir, 12, condensate discharge port, 13, casing.
Detailed Description
The invention provides a wet-type electric precipitation demister, a treatment method and application thereof, and the invention is described in detail with reference to specific embodiments in order to make the advantages and technical scheme of the invention clearer and clearer.
The "deflection electric field" in the present invention is: an electric field for deflecting and changing the velocity direction of the charged particles after the charged particles are injected.
The utility model provides a wet-type electrostatic precipitator defroster, which comprises a housin, the casing has flue gas entry end and flue gas exit end, inside being provided with the air current distribution subassembly being close to the casing of flue gas entry end, the air current distribution subassembly is used for distributing the pending flue gas evenly, the top of air current distribution subassembly be electric charge discharge area and deflection electric field district in proper order, electric charge discharge area and deflection electric field district independent setting, set up rotary device in the electric charge discharge area, when the gas flow through, rotary device makes discharge evenly through the rotation, the deflection electric field district comprises electric field electrode group and the electric field power that deflects. The wet electric precipitation demister further comprises a washing mechanism, and the washing mechanism is located above the deflection electric field area. The electric fields of discharging and deflecting are mutually independent, the electric fields of discharging and deflecting are not mutually influenced, a charging and deflecting mutually independent mode is adopted, the discharging part adopts a rotating electrode, discharging is uniform, and charging efficiency is high.
An inner cofferdam and a condensate discharge port for collecting and discharging corrosive condensate are arranged on the shell near the flue gas inlet end, and the charge-discharge area comprises a discharge rotating electrode, a discharge fixed electrode and a discharge area power supply; the discharge rotating electrode and the discharge fixed electrode are close to the airflow distribution assembly, the discharge rotating electrode is positioned inside the discharge fixed electrode, the rotating device is a rotatable fan blade, the rotating electrode is driven to rotate when airflow passes through the rotating device, and deflection electrodes in the deflection electric field electrode group are uniformly distributed in the vertical direction inside the shell; the flushing mechanism comprises a nozzle and a flushing water pipeline, and the flushing water pipeline provides a water source for the nozzle; the nozzles are distributed right above the deflection electrode group and are provided with a plurality of nozzles.
Example 1:
as shown in fig. 1, the wet-type electric precipitation demister of the present invention comprises a housing 13, a washing mechanism located in the housing 13, a deflection electric field electrode group 5 located below the washing mechanism, a discharge rotating electrode 3 located below the deflection electric field electrode group, and the like, and as a main improvement point of the present invention, the electric fields of discharge and deflection are independent from each other, and have no mutual influence therebetween, and the manner of mutually independent charge and deflection is adopted, and the rotating electrode is adopted in the discharge part, so that the discharge is uniform, and the charge efficiency is high.
The structure of the shell is preferably circular truncated cone-shaped and inverted circular truncated cone-shaped from top to bottom, the middle of the shell is cylindrical, the bottom of the shell is provided with a flue gas inlet 1, the top of the shell is provided with a flue gas outlet 6, flue gas to be treated enters from the flue gas inlet 1 and is discharged from the flue gas outlet 6 after being treated, an inner cofferdam 11 and a condensate discharge port 12 are arranged on the shell near the flue gas inlet 1, liquid drops with strong corrosivity on the shell wall are intercepted and collected by an inner cofferdam 11 and then discharged by the condensate discharge port 12, and the corrosion to other equipment on the lower part is reduced.
An airflow distribution component 2 is arranged in the shell close to the flue gas inlet and used for uniformly distributing flue gas to be treated; the charge-discharge area and the deflection electric field area are sequentially arranged above the airflow distribution assembly, the charge-discharge area and the deflection electric field area are independently arranged, the charge-discharge area comprises a discharge rotating electrode 3, a discharge fixed electrode 4 and a discharge area power supply 10, the discharge rotating electrode is close to the airflow distribution assembly, a rod-shaped electrode is adopted as a cathode of the charge-discharge area, discharge burs are fixed on the electrode, and fan blades are added at the bottom of the discharge rotating electrode, as shown in figure 2, the discharge fixed electrode 4 surrounds the outer side of the rotating electrode, when airflow passes through a gap between the two electrodes, the cathode and the burs fixed on the cathode are driven to rotate, so that discharge is uniform, the airflow flow state is changed, the contact between the airflow and corona is improved, and the charge efficiency is improved. The deflecting electric field area consists of a deflecting electric field electrode group and a deflecting electric field power supply 9; the deflection electric field is preferably a plate-type electric field, and the required electric field can be obtained by reducing the distance between the cathode and the anode because high-voltage discharge is not needed, so that the required voltage is greatly reduced, the voltage is stable and easy to control, and spark or local breakdown is not easy to occur; on the other hand, the distance from the charged particles to the dust collecting electrode is greatly reduced, and the improvement of the dust removal efficiency is facilitated. As the main improvement point of the invention, the deflection electric field area cancels the traditional linear cathode wire, thus solving the problem of fatigue fracture of the cathode wire and greatly improving the operation period.
The flushing mechanism comprises a nozzle 8 and a flushing water pipeline 7, wherein the flushing water pipeline provides water sources for the nozzle, and the nozzles are distributed right above the deflection electrode group and are provided with a plurality of nozzles.
Utilize above-mentioned wet-type electric precipitation defroster to handle the flue gas, its concrete processing step is:
flue gas enters from a flue gas inlet 1, and after the flue gas is uniformly distributed through an air flow distribution assembly 2, the flue gas enters into a gap between a discharge rotating electrode 3 and a discharge fixed electrode 4, and the air flow pushes fan blades at the bottom of the rotating electrode to drive the discharge rotating electrode 3 to rotate, so that the passing air flow generates local turbulence. The discharge region power supply 10 provides direct current high voltage, corona discharge is generated between the discharge rotating electrode 3 and the discharge fixed electrode 4, liquid drops or particles in the air flow enter the deflection electric field electrode group 5 along with the air flow after being charged, the bias electric field power supply 9 provides direct current voltage, a deflection electric field is formed between the positive electrode and the negative electrode of the motor group, the charged particles are deflected under the action of the electric field, the particles are attached to the electrodes, and the flue gas after dust removal is discharged out of the equipment through the flue gas outlet 6. The washing water is intermittently sprayed from a washing water pipe 7 and a nozzle 8 on the upper part of the deflection field electrode group to wash the surface of the dust collecting electrode and remove particles and liquid drops attached to the surface. The liquid drops on the wall of the device are intercepted and collected by the inner weir 11 and then discharged out of the device through the condensate discharge port 12, so that the corrosion to other devices at the lower part is reduced.
Selecting main parameters:
the discharge power supply voltage is 1000 volts,
deflection power supply voltage: the voltage of the power supply is 1000 volts,
the deflection electrode spacing was 10 mm.
The discharge anode is selected to be circular, and the diameter is 20-400 mm, preferably 30-60 mm.
The length of the discharge cathode prickle is 1-200 mm.
The bottom end of the discharge cathode is provided with 2 blades.
Example 2:
the difference from the embodiment 1 is that:
utilize above-mentioned wet-type electric precipitation defroster to handle the flue gas, its concrete processing step is:
flue gas enters from a flue gas inlet 1, and after the flue gas is uniformly distributed through an air flow distribution assembly 2, the flue gas enters into a gap between a discharge rotating electrode 3 and a discharge fixed electrode 4, and the air flow pushes fan blades at the bottom of the rotating electrode to drive the discharge rotating electrode 3 to rotate, so that the passing air flow generates local turbulence. The discharge region power supply 10 provides direct current high voltage, corona discharge is generated between the discharge rotating electrode 3 and the discharge fixed electrode 4, liquid drops or particles in the air flow enter the deflection electric field electrode group 5 along with the air flow after being charged, the bias electric field power supply 9 provides direct current voltage, a deflection electric field is formed between the positive electrode and the negative electrode of the motor group, the charged particles are deflected under the action of the electric field, the particles are attached to the electrodes, and the flue gas after dust removal is discharged out of the equipment through the flue gas outlet 6. The washing water is intermittently sprayed from a washing water pipe 7 and a nozzle 8 on the upper part of the deflection field electrode group to wash the surface of the dust collecting electrode and remove particles and liquid drops attached to the surface. The liquid drops on the wall of the device are intercepted and collected by the inner weir 11 and then discharged out of the device through the condensate discharge port 12, so that the corrosion to other devices at the lower part is reduced.
Selecting main parameters:
the discharge power supply voltage is 50000 volts,
deflection power supply voltage: the voltage of the power supply is 50000V,
deflection electrode spacing: 60 mm.
The discharge anode is selected to be square.
The length of the discharge cathode prickle is 15-100 mm.
The discharge cathode bottom end vane 10 pieces.
Example 3:
the difference from the embodiment 1 is that:
the wet electric precipitation demister is used for treating flue gas, and the specific treatment steps are as follows:
flue gas enters from a flue gas inlet 1, and after the flue gas is uniformly distributed through an air flow distribution assembly 2, the flue gas enters into a gap between a discharge rotating electrode 3 and a discharge fixed electrode 4, and the air flow pushes fan blades at the bottom of the rotating electrode to drive the discharge rotating electrode 3 to rotate, so that the passing air flow generates local turbulence. The discharge region power supply 10 provides direct current high voltage, corona discharge is generated between the discharge rotating electrode 3 and the discharge fixed electrode 4, liquid drops or particles in the air flow enter the deflection electric field electrode group 5 along with the air flow after being charged, the bias electric field power supply 9 provides direct current voltage, a deflection electric field is formed between the positive electrode and the negative electrode of the motor group, the charged particles are deflected under the action of the electric field, the particles are attached to the electrodes, and the flue gas after dust removal is discharged out of the equipment through the flue gas outlet 6. The washing water is intermittently sprayed from a washing water pipe 7 and a nozzle 8 on the upper part of the deflection field electrode group to wash the surface of the dust collecting electrode and remove particles and liquid drops attached to the surface. The liquid drops on the wall of the device are intercepted and collected by the inner weir 11 and then discharged out of the device through the condensate discharge port 12, so that the corrosion to other devices at the lower part is reduced.
Selecting main parameters:
the voltage of the discharge power supply is 2000 v,
deflection power supply voltage: the voltage of the power supply is 2000V,
the deflection electrode spacing was 20 mm.
The discharge anode is selected to be circular, and the diameter is 20-400 mm, preferably 30-60 mm.
The length of the discharge cathode prickle is 1-200 mm.
The bottom end of the discharge cathode is provided with 5 blades.
Example 4:
the difference from the embodiment 1 is that:
the wet electric precipitation demister is used for treating flue gas, and the specific treatment steps are as follows:
flue gas enters from a flue gas inlet 1, and after the flue gas is uniformly distributed through an air flow distribution assembly 2, the flue gas enters into a gap between a discharge rotating electrode 3 and a discharge fixed electrode 4, and the air flow pushes fan blades at the bottom of the rotating electrode to drive the discharge rotating electrode 3 to rotate, so that the passing air flow generates local turbulence. The discharge region power supply 10 provides direct current high voltage, corona discharge is generated between the discharge rotating electrode 3 and the discharge fixed electrode 4, liquid drops or particles in the air flow enter the deflection electric field electrode group 5 along with the air flow after being charged, the bias electric field power supply 9 provides direct current voltage, a deflection electric field is formed between the positive electrode and the negative electrode of the motor group, the charged particles are deflected under the action of the electric field, the particles are attached to the electrodes, and the flue gas after dust removal is discharged out of the equipment through the flue gas outlet 6. The washing water is intermittently sprayed from a washing water pipe 7 and a nozzle 8 on the upper part of the deflection field electrode group to wash the surface of the dust collecting electrode and remove particles and liquid drops attached to the surface. The liquid drops on the wall of the device are intercepted and collected by the inner weir 11 and then discharged out of the device through the condensate discharge port 12, so that the corrosion to other devices at the lower part is reduced.
Selecting main parameters:
the discharge power supply voltage was 5000 volts,
deflection power supply voltage: the voltage of the power supply is 5000 volts,
the deflection electrode spacing was 40 mm.
The discharge anode is selected to be circular, and the diameter is 20-400 mm, preferably 30-60 mm.
The length of the discharge cathode prickle is 1-200 mm.
The bottom end of the discharge cathode is provided with 8 blades.
Of course, the lengths of the barbs of the discharge cathode can be 10mm, 20mm, 25mm, 30mm, 50mm, 75mm, 100mm, 120mm, 150mm, etc., and those skilled in the art can realize various combinations and processing modes under the guidance of the above embodiments.
The invention adopts a mode of independent charge and deflection electric field, and the discharge part adopts a rotating electrode, so that the discharge is uniform and the charge efficiency is high. The deflection electric field part does not need to discharge, and the electric field requirement can be met by adjusting the electrode distance, so that the high voltage requirement is reduced, the requirement of a dust collecting electrode is reduced, and the manufacturing cost is further reduced. By changing the traditional electrode form, the problems of easy spark generation and unstable voltage are solved, and the service life of the equipment is prolonged.
The parts which are not described in the invention can be realized by taking the prior art as reference.
It is intended that any equivalents, or obvious variations, which may be made by those skilled in the art in light of the teachings herein, be within the scope of the present invention.

Claims (20)

1. The utility model provides a wet-type electric precipitation defroster, its includes the casing, the casing flue gas entry end and flue gas outlet end have, its characterized in that: an airflow distribution assembly is arranged in the shell close to the smoke inlet end and used for uniformly distributing smoke to be treated.
2. The wet-type electric precipitation demister as claimed in claim 1, wherein: and a charged discharge area and a deflection electric field area are sequentially arranged above the airflow distribution assembly.
3. The wet-type electric precipitation demister as claimed in claim 1, wherein: the charge-discharge area and the deflection electric field area are independently arranged, a rotating device is arranged in the charge-discharge area, and when air flows through the rotating device, the rotating device enables the discharge to be uniform through rotation.
4. A wet electric precipitation mist eliminator as claimed in any one of claims 1, 2 or 3, wherein: the deflecting electric field area is composed of a deflecting electric field electrode group and a deflecting electric field power supply.
5. The wet-type electric precipitation demister as claimed in claim 4, wherein: the device also comprises a flushing mechanism which is positioned above the deflecting electric field area.
6. The wet-type electric precipitation demister as claimed in claim 5, wherein: an inner cofferdam and a condensate discharge port for collecting and discharging corrosive condensate are arranged on the shell near the flue gas inlet end.
7. The wet-type electric precipitation demister as claimed in claim 5 or 6, wherein: the charge discharge area comprises a discharge rotating electrode, a discharge fixed electrode and a discharge area power supply.
8. The wet-type electric precipitation demister as claimed in claim 7, wherein: the discharge rotating electrode and the discharge fixed electrode are close to the airflow distribution assembly, and the discharge rotating electrode is positioned inside the discharge fixed electrode.
9. The wet-type electric precipitation demister as claimed in claim 8, wherein: the rotating device is a rotatable fan blade, and the rotating device drives the rotating electrode to rotate when air flow passes through the rotating device.
10. The wet-type electric precipitation demister as claimed in claim 4, wherein: deflection electrodes in the deflection electric field electrode group are uniformly distributed in the vertical direction in the shell.
11. The wet-type electric precipitation demister as claimed in claim 5, wherein: the flushing mechanism comprises a nozzle and a flushing water pipeline, and the flushing water pipeline provides a water source for the nozzle.
12. The wet-type electric precipitation demister as claimed in claim 11, wherein: the nozzles are distributed right above the deflection electrode group and are provided with a plurality of nozzles.
13. The wet-type electric precipitation demister as claimed in claim 7, wherein: the cathode of the discharge rotating electrode is a rod-shaped electrode, discharge prickles are fixed on the rod-shaped electrode, and the fan blades are positioned below the discharge prickles.
14. The wet-type electric precipitation demister as claimed in claim 7, wherein: the voltage of the discharge region power supply is 1000-50000V, and the voltage of the deflection electric field power supply of the deflection electric field region is 1000-50000V.
15. The wet-type electric precipitation demister as claimed in claim 10, wherein: the distance between adjacent deflection electrodes is 10-60 mm.
16. The wet-type electric precipitation demister as claimed in claim 9, wherein: the blades of the fan blades are 2-10, and the length of the discharge prickle is 15-100 mm.
17. The treatment method of the wet-type electric precipitation demister as claimed in any one of claims 1-6, comprising the following steps in sequence:
a. the flue gas enters from a flue gas inlet end, and after being uniformly distributed through the airflow distribution assembly, the flue gas enters into a gap between the discharge rotating electrode and the discharge fixed electrode, the discharge rotating electrode is driven to rotate through disturbed airflow, and the passing airflow generates local turbulence;
b. providing direct current high voltage through a power supply in a discharge area, generating corona discharge between a discharge rotating electrode and a discharge fixed electrode, enabling liquid drops or particles in air flow to enter a deflection electric field electrode group along with the air flow after the liquid drops or the particles are charged, providing direct current voltage through a bias electric field power supply, forming a deflection electric field between a positive electrode and a negative electrode of a motor group, and deflecting the charged particles under the action of the electric field;
c. and the flue gas after dust removal is discharged out of the equipment through a flue gas outlet.
18. The treatment method of the wet-type electric precipitation demister as claimed in claim 17, wherein: and c, cleaning the surface of the dust collecting electrode by washing water in intervals.
19. The treatment method of the wet-type electric precipitation demister as claimed in claim 17, wherein: the washing water is intermittently sprayed out from the washing water pipeline and the nozzles at the upper part of the deflection field electrode group, and the liquid drops on the wall of the washing water are intercepted and collected by the inner weir and then discharged through the condensate discharge port.
20. Use of a wet electric precipitation demister according to any one of claims 1-6 in flue gas treatment of petroleum, chemical and smelting plants.
CN201910529026.8A 2019-06-19 2019-06-19 Wet-type electric precipitation demister, treatment method and application thereof Pending CN112108268A (en)

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Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1115263A (en) * 1994-07-18 1996-01-24 张金柱 Electrostatic electronic dust catcher
CN201168647Y (en) * 2007-11-22 2008-12-24 武汉钢铁(集团)公司 Dipolar charge electrostatic coagulation dust removing apparatus
CN102430478A (en) * 2011-08-26 2012-05-02 浙江菲达脱硫工程有限公司 Device and method for removing PM 2.5 from smoke
CN102872976A (en) * 2012-09-26 2013-01-16 东北大学 Double-zone multistage electrostatic dust collector with charged cold anode and application method thereof
CN203437208U (en) * 2013-08-23 2014-02-19 西安西热锅炉环保工程有限公司 Wet-type electrostatic dust and mist remover
CN103878065A (en) * 2014-03-26 2014-06-25 南京宇行环保科技有限公司 Washing water collection device of wet-type electric demister
CN104258997A (en) * 2014-07-23 2015-01-07 江苏宝华环保科技有限公司 Bag-type dust collector with dust collecting device
CN204107662U (en) * 2014-09-16 2015-01-21 孙红梅 Be provided with the air purifier rotating corona electrode
CN204234208U (en) * 2014-11-18 2015-04-01 福建龙净环保股份有限公司 Wet electrical dust precipitator and drainage arrangement thereof
CN104689918A (en) * 2015-03-23 2015-06-10 中冶赛迪工程技术股份有限公司 Wet-type electric deduster
CN105289844A (en) * 2015-09-24 2016-02-03 上海市政工程设计研究总院(集团)有限公司 Charged water spray printing and dyeing waste gas treatment device and method
CN105457755A (en) * 2015-12-30 2016-04-06 铜陵有色金属集团股份有限公司铜冠冶化分公司 Wet type electric dust collector suitable for positive-pressure operation conditions
CN107175169A (en) * 2017-05-12 2017-09-19 浙江大学 Humidification stream pre electrified particulate matter reinforcing removing system
CN207222149U (en) * 2017-09-30 2018-04-13 厦门龙净环保技术有限公司 A kind of wet electrostatic cyclone dust
CN208661411U (en) * 2018-08-23 2019-03-29 北京华清悟净科技有限公司 A kind of Compact gas electrostatic filter
CN109806975A (en) * 2019-01-30 2019-05-28 浙江大学 A kind of reinforcing Uniform Discharge device and method

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1115263A (en) * 1994-07-18 1996-01-24 张金柱 Electrostatic electronic dust catcher
CN201168647Y (en) * 2007-11-22 2008-12-24 武汉钢铁(集团)公司 Dipolar charge electrostatic coagulation dust removing apparatus
CN102430478A (en) * 2011-08-26 2012-05-02 浙江菲达脱硫工程有限公司 Device and method for removing PM 2.5 from smoke
CN102872976A (en) * 2012-09-26 2013-01-16 东北大学 Double-zone multistage electrostatic dust collector with charged cold anode and application method thereof
CN203437208U (en) * 2013-08-23 2014-02-19 西安西热锅炉环保工程有限公司 Wet-type electrostatic dust and mist remover
CN103878065A (en) * 2014-03-26 2014-06-25 南京宇行环保科技有限公司 Washing water collection device of wet-type electric demister
CN104258997A (en) * 2014-07-23 2015-01-07 江苏宝华环保科技有限公司 Bag-type dust collector with dust collecting device
CN204107662U (en) * 2014-09-16 2015-01-21 孙红梅 Be provided with the air purifier rotating corona electrode
CN204234208U (en) * 2014-11-18 2015-04-01 福建龙净环保股份有限公司 Wet electrical dust precipitator and drainage arrangement thereof
CN104689918A (en) * 2015-03-23 2015-06-10 中冶赛迪工程技术股份有限公司 Wet-type electric deduster
CN105289844A (en) * 2015-09-24 2016-02-03 上海市政工程设计研究总院(集团)有限公司 Charged water spray printing and dyeing waste gas treatment device and method
CN105457755A (en) * 2015-12-30 2016-04-06 铜陵有色金属集团股份有限公司铜冠冶化分公司 Wet type electric dust collector suitable for positive-pressure operation conditions
CN107175169A (en) * 2017-05-12 2017-09-19 浙江大学 Humidification stream pre electrified particulate matter reinforcing removing system
CN207222149U (en) * 2017-09-30 2018-04-13 厦门龙净环保技术有限公司 A kind of wet electrostatic cyclone dust
CN208661411U (en) * 2018-08-23 2019-03-29 北京华清悟净科技有限公司 A kind of Compact gas electrostatic filter
CN109806975A (en) * 2019-01-30 2019-05-28 浙江大学 A kind of reinforcing Uniform Discharge device and method

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