CN210304122U - Plate-type wet electrostatic pre-dust collector - Google Patents

Plate-type wet electrostatic pre-dust collector Download PDF

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Publication number
CN210304122U
CN210304122U CN201920581762.3U CN201920581762U CN210304122U CN 210304122 U CN210304122 U CN 210304122U CN 201920581762 U CN201920581762 U CN 201920581762U CN 210304122 U CN210304122 U CN 210304122U
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cathode
flue gas
dust removal
plate
tower
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CN201920581762.3U
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傅仰林
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Jiangxi Dragon Environmental Protection Engineering Co Ltd
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Jiangxi Dragon Environmental Protection Engineering Co Ltd
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Abstract

The utility model relates to an environmental protection equipment field specifically is a board-like wet-type electrostatic precipitator in advance, including the gas wash tower, be provided with the clean room in the gas wash tower, set up the baffle in the clean room and constitute the square and erect the tubulose anode plate, set up four negative pole posts in every square of clean room, four negative pole posts set up respectively in the intraductal four sides of square of clean room, four negative pole posts are improved level the closure and are provided with the negative pole line, present four square frames of fixing on four negative pole posts, the top is provided with washing unit, the gas wash tower top is provided with into the mouth, the gas wash tower lower extreme is provided with out the mouth. The square plate-shaped dust removal chamber has the advantages of high anode strength, light weight, compact structure, small occupied area, capability of utilizing space to the maximum extent, effective utilization of the inside and outside of the tube wall, simple installation, difficult deformation, more uniform charge distribution of square grid-shaped cathode lines, charge concentration in four corners on the anode plate, larger dust and dirt carrying space, capability of flowing down along the corners and difficult accumulation.

Description

Plate-type wet electrostatic pre-dust collector
Technical Field
The utility model relates to an environmental protection equipment field specifically is a board-like wet-type electrostatic precipitator in advance.
Background
Flue gas desulfurization is an effective method for controlling the emission of sulfur dioxide in coal-fired flue gas of a power plant, which is widely adopted at home and abroad, wherein a wet flue gas desulfurization process is the most widely applied and effective flue gas desulfurization process in the world due to the advantages of mature technology, high desulfurization rate and the like. At present, the market share of wet desulphurization in the world is more than 85%, China is as high as 95%, and the average removal rate of sulfur dioxide in the wet desulphurization process can reach more than 95%.
The traditional wet desulphurization system generally adopts a two-stage mechanical demister to remove water vapor carried out from flue gas, heats saturated flue gas washed by an absorption tower through GGH, and discharges the saturated flue gas through a chimney, and the starting point of the mode is that the flue gas is heated through GGH, and the corrosion of the flue gas to the chimney can be reduced after the temperature of the flue gas is expected to be increased to about 80 ℃. But the problem of chimney corrosion is not solved in fact, because the removal rate of sulfur trioxide in the flue gas in the wet desulphurization process is only 40% -50%, considerable sulfur trioxide is discharged along with the flue gas in the form of aerosol, the temperature of the heated flue gas is still lower than the acid dew point temperature, and the sulfur trioxide is condensed on the chimney wall to cause corrosion. The mechanical demister has the function of reducing the content of water mist in the flue gas as much as possible, but has a better removing effect on large liquid drops of more than 40 microns, and condensate appears on the wall of the chimney by fine dirt drops, so that the chimney is corroded more severely. The fine dust and aerosol in the smoke can not be removed, and the smoke directly enters the respiratory tract of a human body in the atmosphere and is most harmful to the health of the human body. A novel pre-dedusting device capable of removing dust and sol in wet desulphurization is urgently needed to be added before smoke emission.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem, the utility model provides a plate-type wet electrostatic precipitator in advance.
In order to achieve the above object, the utility model provides a following technical scheme: a plate-type wet electrostatic pre-dust collector comprises a dust removal tower, wherein a dust removal chamber is arranged in the dust removal tower, partition plates are arranged in the dust removal chamber to form square upright tubular anode plates, cathode frames are arranged above and below the dust removal chamber, cathode columns are connected and arranged on the cathode frames and vertically extend into square tubes of the dust removal chamber, four cathode columns are arranged in each square tube of the dust removal chamber, the upper ends and the lower ends of the cathode columns are fixed on the cathode frames, the four cathode columns are respectively arranged on four sides in the square tubes of the dust removal chamber, cathode lines are horizontally arranged on the four cathode columns in a closed mode, a square frame with four corners fixed on the four cathode columns is presented, a flushing device is arranged above the cathode frames, a flushing port is arranged at the bottom of the flushing device, and a flushing fluid inlet is arranged on the flushing device, the dedusting tower is characterized in that a smoke inlet is formed in the top of the dedusting tower, and a smoke outlet and a sewage outlet are formed in the lower end of the dedusting tower. The square plate-shaped dust removal chamber has the advantages of high dust collection efficiency, large smoke treatment amount, long service life and low maintenance cost, the anode of the square plate-shaped dust removal chamber has high strength, light weight, compact structure, small occupied area, capability of utilizing space to the maximum extent, effective utilization of the inside and outside of the tube wall, simple installation, difficult deformation, more uniform charge distribution of square grid-shaped cathode lines, charge concentration in four corners on the anode plate, larger dust and dirt attaching space, capability of flowing down along corners and difficult accumulation.
Furthermore, the cathode lines are uniformly arranged at vertical intervals, so that the charge distribution is uniform, and the dust removal area is increased.
Furthermore, the edge of the cathode line is in a sawtooth shape, so that the corona starting voltage is reduced.
Furthermore, the cathode line and the dust removal chamber are close to be provided with insulating porcelain, the cathode column and the dust removal chamber anode plate are provided with insulating porcelain therebetween, and safety is improved.
Furthermore, the outer wall of the dust removal tower body is provided with an insulation can, so that heat preservation is facilitated.
Further, the outer wall of the dust removal tower is provided with an insulating box, so that the power supply safety is improved.
Furthermore, a high-voltage rectifier transformer is arranged in the insulating box, the cathode of the transformer is connected with the cathode wire, and the anode of the transformer is connected with the dust removal chamber, so that the dust removal effect is improved.
Furthermore, an insulating support is arranged between the dust removal chamber and the cathode frame, so that the safety is improved.
Furthermore, the cathode wire is made of titanium alloy or lead-antimony alloy, the honeycomb tube of the dust removing chamber is made of stainless steel, and the electric demister is corrosion-resistant, low in corona starting voltage and capable of operating under the working conditions of low voltage and high current only by 20 KV; the current density is high, the specific current can reach 1.45MA/M, the sublimed sulfur adhesion and dirt wrapping capacity can be effectively resisted, and the dust mist trapping capacity is improved.
Furthermore, the smoke inlet is communicated with a smoke outlet of an industrial flue gas desulfurization tower or an industrial flue gas denitration tower through a flue gas pipeline, the smoke outlet is communicated with a chimney or secondary dust removal equipment, the sewage outlet is communicated to a circulating water tank, a washing fluid inlet is communicated with a washing water source through a pipeline, and a booster pump is arranged on a washing fluid inlet pipeline, so that the industrial flue gas is dedusted, the ultralow emission is realized, and the problem of chimney emission is thoroughly solved.
Compared with the prior art, the beneficial effects of the utility model are that: the dust collection efficiency is high, the smoke treatment amount is large, the service life is long, and the maintenance cost is low; the square plate-shaped dust removal chamber has the advantages of high anode strength, light weight, compact structure, small occupied area, capability of utilizing space to the maximum extent, effective utilization of both the inside and the outside of the pipe wall, simple installation and difficult deformation; the charge distribution of the grid-shaped cathode lines is more uniform, the charge on the anode plate is concentrated at four corners, the dust and dirt carrying space is larger, and the dust and dirt can flow down along the corners and are not easy to accumulate; corrosion resistance, low corona starting voltage, high current density and high dust and fog collecting capacity.
Drawings
FIG. 1 is a schematic view of the internal structure of the present invention;
FIG. 2 is a cross-sectional view of the dust chamber of the present invention;
FIG. 3 is a schematic perspective view of the cathode line and the cathode pillar of the present invention;
fig. 4 is a top view of a single square dust removal unit of the dust removal chamber of the present invention.
In the figure: 1-a dust removal tower, 2-a dust removal chamber, 3-a cathode frame, 4-a flushing device, 5-a smoke inlet, 6-a smoke outlet, 7-a dirt outlet, 8-an insulating box, 9-an insulating box, 31-a cathode line, 32-a cathode column, 41-a flushing port and 42-a flushing liquid inlet
Detailed Description
In order to illustrate the technical solution of the present invention more clearly, the following will combine some embodiments of the present invention to describe the technical solution of the present invention clearly and completely.
Example 1
In the embodiment, with reference to fig. 1-4, a plate-type wet electrostatic pre-dust collector is provided with a dust chamber 2 in a dust tower 1, partition plates are arranged in the dust chamber 2 to form square upright tubular anode plates, cathode frames 3 are arranged above and below the dust chamber 2, an insulating support is arranged between the dust chamber 2 and the cathode frames 3, cathode columns 32 are connected and arranged on the cathode frames 3, the cathode columns 32 vertically extend into square tubes of the dust chamber 2, four cathode columns 32 are arranged in each square tube of the dust chamber 2, the upper end and the lower end of each cathode column 32 are fixed on the cathode frame 3, the four cathode columns 32 are respectively arranged on four sides in the square tubes of the dust chamber 2, cathode lines 31 are horizontally arranged on the four cathode columns 32 in a closed manner, the cathode lines 31 are horizontally arranged, four square frames fixed on the four cathode columns 32 are presented, and the cathode lines 31 are vertically arranged at, the negative pole line 31 edge is the cockscomb structure, negative pole line 31 is made for titanium alloy or lead-antimony alloy, negative pole line 31 is provided with the insulated porcelain with 2 department of being close of clean room, be provided with the insulated porcelain between negative pole post 32 and 2 anode plates of clean room, 3 tops of negative pole frame are provided with washing unit 4, the washing unit bottom is provided with washes mouthful 41, be provided with flush fluid entry 42 on the washing unit 4, 1 tops of clean tower are provided with into mouth 5, 1 lower extreme of clean tower is provided with outlet flue 6 and outlet dirty mouthful 7, 1 tower body outer wall of clean tower is provided with insulation can 9, 1 outer wall of clean tower is provided with insulation can 8, be provided with high-voltage rectifier transformer in the insulation can 8, the transformer negative pole with negative pole line 31 is connected, the transformer positive. The dust removal principle of the wet electrostatic dust collector is that dust-containing flue gas enters a dust removal tower 1 from a flue inlet 5, when the dust-containing flue gas passes through a high-voltage electrostatic field of a dust removal chamber 2, the dust-containing flue gas collides with positive ions, negative ions and electrons between electrodes or is charged in ion diffusion motion, dust particles with the electrons and the ions move towards an opposite electrode under the action of electric field force and are adsorbed on the opposite electrode, the treated flue gas is discharged to a chimney from a flue outlet 6, and dust and grease on the electrode fall into waste liquid at the bottom of the dust collector by a flushing device 4 in a spraying mode and the like. The square tubular dust removal chamber has the advantages of high dust collection efficiency, large smoke treatment capacity, long service life, low maintenance cost, high dust fog collection capacity, high anode strength of the square tubular dust removal chamber, light weight, compact structure, small occupied area, capability of utilizing space to the maximum extent, effective utilization of the inside and the outside of the pipe wall, simple installation, difficult deformation, good safety, corrosion resistance, low corona starting voltage, capability of only 20KV, capability of enabling the electric demister to be in lower voltage and operate under the working condition of larger current, high current density, specific current of 1.45MA/M, capability of effectively resisting adhesion of sublimed sulfur and dirt wrapping-up capability, more uniform charge distribution of square grid cathode wires, charge concentration on four corners on an anode plate, larger dust loading space, capability of flowing down along corners and difficult accumulation.
Example 2
Embodiment 1 is combined in this embodiment, and on the basis of embodiment 1, the outlet flue of advancing smoke mouth 5 and industrial flue gas desulfurization tower or industrial flue gas denitration tower passes through the flue gas pipeline intercommunication, 6 secondary dust collecting equipment in the outlet flue, outlet flue 7 communicate to the circulating water pond, and flush fluid entry 42 passes through the pipeline intercommunication and washs the water source, the booster pump is equipped with on the lotion entry 42 pipeline, is provided with glass steel polypropylene pp defroster baffling plate formula breakwater defroster on the outlet flue. The dust removal of the industrial flue gas is convenient, the ultralow emission is realized, and the emission problem of a chimney is thoroughly solved.
Example 3
This embodiment combines fig. 1-4, a board-like wet-type electrostatic precipitator in advance is provided with clean room 2 in the non-conductive glass steel gas wash tower 1, sets up the electrically conductive glass steel baffle in the clean room 2 and constitutes the square tubular anode plate of erectting, and electrically conductive glass steel is laminated structure, is in proper order from inlayer to skin: 1 layer of carbon fiber pad, 2 layers of chopped fiber strip pads, 3 layers of 0.4mm thick glass fiber cloth and l layers of glass surface pads, wherein the resin adopts vinyl resin containing graphite (98%) and fire retardant, steel cathode frames 3 are arranged above and below the dust chamber 2, an insulating support is arranged between the dust chamber 2 and the cathode frames 3, cathode columns 32 are connected and arranged on the cathode frames 3, the cathode columns 32 vertically extend into the square tubes of the dust chamber 2, four cathode columns 32 are arranged in each square tube of the dust chamber 2, the upper ends and the lower ends of the cathode columns 32 are fixed on the cathode frames 3, the four cathode columns 32 are respectively arranged on the four sides of the square tubes of the dust chamber 2, cathode lines 31 are horizontally arranged on the four cathode columns 32 in a closed manner, the cathode lines 31 are horizontally arranged, square frames with the four corners fixed on the four cathode columns 32 are presented, and the cathode lines 31 are vertically and evenly arranged at intervals, the edge of the cathode wire 31 is zigzag, the cathode wire 31 is made of titanium alloy or lead-antimony alloy, the part of the cathode wire 31 close to the dust chamber 2 is provided with insulating porcelain, the insulating porcelain is arranged between the cathode column 32 and the anode plate of the dust chamber 2, the washing device 4 is arranged above the cathode frame 3, the bottom of the washing device is provided with a washing port 41, the washing device 4 is provided with a washing fluid inlet 42, the top of the dust removing tower 1 is provided with a smoke inlet 5, the lower end of the dust removing tower 1 is provided with a smoke outlet 6 and a sewage outlet 7, the outer wall of the tower body of the dust removing tower 1 is provided with an insulation box 9, the outer wall of the dust removing tower 1 is provided with an insulation box 8, a high-voltage rectifier transformer is arranged in the insulation box 8, the transformer cathode is connected with the cathode wire 31, the transformer anode is connected with the dust chamber 2, the smoke inlet 5 is communicated with the, the dirty mouthful 7 intercommunication is to circulating water pond, and the flush fluid entry 42 is through pipeline intercommunication washing water source, the booster pump is equipped with on the 42 pipelines of lotion entry, is provided with glass steel polypropylene pp defroster baffling plate formula breakwater defroster on the outlet flue. The dust removal principle of the wet electrostatic dust collector is that dust-containing flue gas enters a dust removal tower 1 from a flue inlet 5, when the dust-containing flue gas passes through a high-voltage electrostatic field of a dust removal chamber 2, the dust-containing flue gas collides with positive ions, negative ions and electrons between electrodes or is charged in ion diffusion motion, dust particles with the electrons and the ions move towards an opposite electrode under the action of electric field force and are adsorbed on the opposite electrode, the treated flue gas is discharged to a chimney from a flue outlet 6, and dust and grease on the electrode fall into waste liquid at the bottom of the dust collector by a flushing device 4 in a spraying mode and the like. The conductive glass fiber reinforced plastic has strong corrosion resistance, can resist corrosion of various dilute acid, alkali and salt mediums, has good flame retardance, oxygen index of less than 28 percent, light weight, high strength and definite appearance size.
The wet electrostatic precipitator dust removal principle is that dusty flue gas gets into gas wash tower 1 by inlet 5, when through 2 high-voltage electrostatic fields of clean room, with the interelectrode positive, anion and electron bump or the lotus in the ion diffusion motion, take the dust particle of electron and ion to the opposite sex electrode motion and adsorb on the opposite sex electrode under the electric field force effect, flue gas after the processing is arranged to the chimney by outlet 6, washing unit 4 makes the dust grease on the electrode fall into dust remover bottom waste liquid through modes such as spraying, the process is:
the current principle is as follows:
the conductive glass fiber reinforced plastic dust collecting polar plate has the advantages that the dust collection is uniform, the dust collection efficiency is higher, the jagged star-shaped line of the cathode is easy to generate corona, and air can be ionized under lower voltage to charge dust particles; the operation is stable, the reliability is high, the deposition efficiency can be kept for a long time, and transient and steady-state short circuit can be borne. When the electric field is deposited to generate spark discharge, because the output current of the power supply is constant current, the current in the electric field cannot be increased, and the input current of the power grid is 10 percent of the rated value, the safety of constant current power supply equipment is ensured, and meanwhile, because the input current is constant current, the discharge channel disappears automatically, and the corona wire and the anode plate are protected; can adapt to the working condition change, overcome the secondary dust raising caused by rapping, and have the capability of inhibiting corona blocking and cathode hypertrophy. When the concentration of dust, coal tar or acid mist in the electric field is increased and the flow rate is accelerated, the specific resistance of the electric field is increased, the voltage in the electric field can automatically rise due to constant output current, the electric field obtains more electric energy, and the purification effect is good; the operating voltage is high, discharge can be inhibited, and the device is not sensitive to mechanical defects; the power supply has a simple structure, the multiple groups of L-C adopt parallel connection design, the maintenance is convenient, the failure rate of the power supply is low, the power factor is high and cos is more than or equal to 0.90, and the power-saving effect is obvious. The anode system consists of parts such as an anode suspension device, an anode plate and the like, the anode cylinder is a dust collecting electrode and is formed by a delta 2 stainless steel plate on a special machine, the anode cylinder consisting of 85 dust collecting electrode cylinders is arranged into a plane with better rigidity, the concentricity of the anode cylinder is ensured to be within a specified range so as to ensure the limit deviation of the distance between a cathode and an anode, and the cathode system consists of parts such as a cathode hanger, a vertical beam, an upper frame, a lower frame, a cathode line and the like. The cathode wire is a discharge electrode, is made of special equipment, is mainly made of star-shaped wire series, and is one of key parts of the wet electrostatic dust collector. The cathode hanging is to hang the whole cathode system on a girder at the top and introduce a high-voltage cathode. The planar structure composed of vertical beams, upper beams, etc. has the function of fixing the upper and lower frames and the cathode spraying shaft system. The upper and lower frames are the supports of the cathode wires, and the spraying system is composed of bottom spraying and top spraying. When entering the dust remover, the flue gas is firstly mixed with water sprayed from the bottom, enters an electric field, is mainly adsorbed on the anode plate after being charged, water sprayed from the upper part flushes the anode plate, falls to the bottom and is taken away by a water outlet, the shell is a part for supporting the whole dust remover, the main body is a stainless steel cylinder with the diameter of 2.5m, the top is a conical outlet, the conical outlet is also provided with an access hole, the cylinder is also provided with the access hole and an air inlet hole, and is provided with a ladder-moving platform, in order to facilitate the on-site operation and daily maintenance of the wet electrostatic precipitator, all main maintenance points can be reached by a ladder platform, the wet electrostatic precipitator operates under high voltage and adopts negative corona treatment, the anode and the shell are equipotential, so that the equipment must be reliably grounded to protect high-voltage equipment and personal safety, a grounding network can reach less than 2 ohms all year round, and the arrangement of the grounding network strives to make the surrounding voltage to earth uniform.
The present invention is not limited to the above-described embodiments, and various changes can be made by those skilled in the art, and any changes which are equivalent or similar to the present invention are intended to be covered by the scope of the claims of the present invention.

Claims (11)

1. The utility model provides a board-like wet-type electrostatic precipitator in advance, includes gas wash tower (1), its characterized in that: the device is characterized in that a dust removal chamber (2) is arranged in the dust removal tower (1), partition plates are arranged in the dust removal chamber (2) to form grids to erect tubular anode plates, cathode frames (3) are arranged above and below the dust removal chamber (2), cathode columns (32) are connected and arranged on the cathode frames (3), the cathode columns (32) vertically extend into the grid tubes of the dust removal chamber (2), four cathode columns (32) are arranged in each grid tube of the dust removal chamber (2), the upper ends and the lower ends of the cathode columns (32) are fixed on the cathode frames (3), the four cathode columns (32) are respectively arranged on the four inner sides of the grid tubes of the dust removal chamber (2), cathode lines (31) are horizontally arranged on the four cathode columns (32) in a closed mode, the cathode lines (31) are horizontally arranged, and square frames with the four corners fixed on the four cathode columns (32) are presented, cathode frame (3) top is provided with washing unit (4), the washing unit bottom is provided with washes mouth (41), be provided with flush fluid entry (42) on washing unit (4), gas wash tower (1) top is provided with into smoke mouth (5), gas wash tower (1) lower extreme is provided with outlet flue (6) and outlet dirt mouth (7).
2. A plate-type wet electrostatic precipitator according to claim 1, wherein: the cathode lines (31) are vertically and uniformly arranged at intervals.
3. A plate-type wet electrostatic precipitator according to claim 2, wherein: the edge of the cathode line (31) is in a sawtooth shape.
4. A plate-type wet electrostatic precipitator according to claim 2, wherein: the cathode wire (31) and the dust removal chamber (2) are close to be provided with insulating porcelain, the cathode column (32) and the anode plate of the dust removal chamber (2) are provided with insulating porcelain therebetween.
5. A plate-type wet electrostatic precipitator according to any one of claims 1 to 4, wherein: the outer wall of the tower body of the dust removal tower (1) is provided with an insulation can (9).
6. A plate-type wet electrostatic precipitator according to claim 5, wherein: the outer wall of the dust removing tower (1) is provided with an insulating box (8).
7. A plate-type wet electrostatic precipitator according to claim 6, wherein: be provided with high-voltage rectifier transformer in insulating case (8), the transformer negative pole with negative pole line (31) are connected, the transformer positive pole with clean room (2) are connected.
8. A plate-type wet electrostatic precipitator according to claim 6 or 7, wherein: an insulating support is arranged between the dust removing chamber (2) and the cathode frame (3).
9. A plate-type wet electrostatic precipitator according to claim 8, wherein: the cathode wire (31) is made of titanium alloy or lead-antimony alloy, and the honeycomb tube of the dust removing chamber (2) is made of stainless steel.
10. A plate-type wet electrostatic precipitator according to claim 8, wherein: the flue gas inlet (5) is communicated with a flue gas outlet of an industrial flue gas desulfurization tower or an industrial flue gas denitration tower through a flue gas pipeline, the flue gas outlet (6) is communicated with a chimney or secondary dust removal equipment, the sewage outlet (7) is communicated with a circulating water tank, a washing liquid inlet (42) is communicated with a washing water source through a pipeline, and a booster pump is arranged on the washing liquid inlet (42) pipeline.
11. A plate-type wet electrostatic precipitator according to claim 9, wherein: the flue gas inlet (5) is communicated with a flue gas outlet of an industrial flue gas desulfurization tower or an industrial flue gas denitration tower through a flue gas pipeline, the flue gas outlet (6) is communicated with a chimney or secondary dust removal equipment, the sewage outlet (7) is communicated with a circulating water tank, a washing liquid inlet (42) is communicated with a washing water source through a pipeline, and a booster pump is arranged on the washing liquid inlet (42) pipeline.
CN201920581762.3U 2019-04-26 2019-04-26 Plate-type wet electrostatic pre-dust collector Active CN210304122U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920581762.3U CN210304122U (en) 2019-04-26 2019-04-26 Plate-type wet electrostatic pre-dust collector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920581762.3U CN210304122U (en) 2019-04-26 2019-04-26 Plate-type wet electrostatic pre-dust collector

Publications (1)

Publication Number Publication Date
CN210304122U true CN210304122U (en) 2020-04-14

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Application Number Title Priority Date Filing Date
CN201920581762.3U Active CN210304122U (en) 2019-04-26 2019-04-26 Plate-type wet electrostatic pre-dust collector

Country Status (1)

Country Link
CN (1) CN210304122U (en)

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