CN112934463A - Electric dust collector and polar plate using ion wind to assist dust collection - Google Patents
Electric dust collector and polar plate using ion wind to assist dust collection Download PDFInfo
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- CN112934463A CN112934463A CN202110316159.4A CN202110316159A CN112934463A CN 112934463 A CN112934463 A CN 112934463A CN 202110316159 A CN202110316159 A CN 202110316159A CN 112934463 A CN112934463 A CN 112934463A
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- 239000000428 dust Substances 0.000 title claims abstract description 250
- 230000005684 electric field Effects 0.000 claims abstract description 64
- 239000012717 electrostatic precipitator Substances 0.000 claims abstract description 26
- 239000012716 precipitator Substances 0.000 claims abstract 4
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000010419 fine particle Substances 0.000 abstract description 25
- 230000000694 effects Effects 0.000 abstract description 14
- 239000002245 particle Substances 0.000 description 50
- 150000002500 ions Chemical class 0.000 description 42
- 230000009471 action Effects 0.000 description 16
- 239000003344 environmental pollutant Substances 0.000 description 13
- 231100000719 pollutant Toxicity 0.000 description 13
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 238000009991 scouring Methods 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 2
- HPNMFZURTQLUMO-UHFFFAOYSA-N diethylamine Chemical compound CCNCC HPNMFZURTQLUMO-UHFFFAOYSA-N 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- 230000000630 rising effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION 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
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/40—Electrode constructions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION 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
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/74—Cleaning the electrodes
- B03C3/78—Cleaning the electrodes by washing
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- Electrostatic Separation (AREA)
Abstract
本发明公开了一种利用离子风辅助收尘的电除尘器及极板，包括若干对结构相同的电除尘器收尘极板对称布置形成的前电场和后电场；在前电场电除尘器收尘极板之间布设有芒刺线放电极，在芒刺线放电极后部电除尘器收尘极板内侧布置有结构对称的长槽状框型板形成空腔，空腔开口方向朝向气流入口；在后电场电除尘器收尘极板之间布设有圆线放电极；前电场电除尘器收尘极板间距布置宽度小于后电场电除尘器收尘极板间距。通过上述带空腔的新型极板，可利用放电产生的离子风有效地捕集微细颗粒，还可以利用空腔的静电屏蔽效应提高电除尘器对高、低比电阻粉尘的除尘效率，扩大电除尘器对不同比电阻粉尘的适用范围；从而提高整体收尘效率。
The invention discloses an electrostatic precipitator and a pole plate using ion wind to assist in dust collection, comprising a front electric field and a rear electric field formed by symmetrical arrangement of several pairs of electrostatic precipitator dust collection pole plates with the same structure; Barbed wire discharge electrodes are arranged between the dust electrode plates, and a long slot-shaped frame plate with symmetrical structure is arranged on the inner side of the electrostatic precipitator dust collector at the rear of the barbed wire discharge electrode to form a cavity, and the opening direction of the cavity faces the airflow. Entrance; round wire discharge electrodes are arranged between the dust collecting plates of the rear electric field electrostatic precipitator; the width of the spacing between the dust collecting plates of the front electric precipitator is smaller than the spacing between the dust collecting plates of the rear electric precipitator. Through the above-mentioned new type of electrode plate with cavity, the ion wind generated by the discharge can be used to effectively capture fine particles, and the electrostatic shielding effect of the cavity can also be used to improve the dust removal efficiency of the electrostatic precipitator for high and low specific resistance dust, expand the electrostatic The scope of application of the dust collector to dust with different specific resistances; thereby improving the overall dust collection efficiency.
Description
Technical Field
The invention relates to an electric dust collector, in particular to an electric dust collector and an anode plate utilizing ion wind to assist dust collection.
Background
The fine solid particle pollutants in the atmospheric pollutants are important factors influencing the environmental quality and the human health, and the equipment for treating the particle pollutants is a dust remover designed based on different principles. Bag type dust collectors, cyclone dust collectors, electric dust collectors, wet dust collectors and composite dust collectors are the main dust collecting equipment in the market at present. With the stricter emission standards of pollutants, various dust collectors are required to be improved and perfected continuously to meet the requirements of the emission standards of the pollutants.
The electric dust collector ionizes gas through discharge of the discharge electrode, particle pollutants obtain electrons and are charged, then the charged particle pollutants move to the dust collection electrode and are deposited on the dust collection polar plate, and finally the particle pollutants on the dust collection electrode are removed into the ash bucket, so that the purpose of removing the particle pollutants in the smoke is achieved. The electric dust remover has the advantages of high dust removal efficiency, small pressure loss, low energy consumption, good applicability and the like, but the smoke and dust properties of the smoke have great influence on the performance of the electric dust remover, and the dust specific resistance range which is most suitable for the electric dust remover to work is 106-1011Omega cm. The dust collection efficiency of the electric dust collector is affected by too small particle size, too high or too low specific resistance of the dust.
The particle charging mode in the electric dust collector is divided into diffusion charging and electric field charging, and the diffusion charging is in a leading position for fine particles with smaller particle size. Because the particle size of the dust is small, the charging is difficult, the charged amount is small, and the charged particles are subjected to small electric field force and are not easy to be trapped. Research shows that particles with the dust particle size larger than 1 mu m in the electric dust collector are close to saturation charge, and the charge quantity of the particles with the particle size within the range of 0.1-1 mu m is far lower than a theoretical value, so that the trapping effect of the particles within the particle size range is poor.
Ion wind (EHD), also known as electrically induced secondary current, is a flow of air around an electrode induced by a large amount of ion jet motion generated by electrons colliding with air molecules as the electrode discharges. The principle of using an electric dust collector to remove dust is that a discharge electrode generates a large amount of ions through corona discharge to charge particles, and the charged particles are collected under the action of an electric field force. Therefore, the generation of ion wind is inevitable when the electric dust collector is operated.
With the increase of the power supply voltage of the electric dust collector, the ion wind has great influence on the primary flow in the electric dust collector. When the voltage is continuously increased, the flow field in the electric dust collector is gradually converted from laminar flow to form complex turbulent flow, and the turbulent flow is mainly expressed in a vortex mode. Under the working voltage of the electric dust collector, the formed high-speed ion wind forms an acting force parallel to the pole plates at the dust collecting pole plates, so that the collected dust is easily washed, and the fine dust returns to the flow field again, thereby increasing the burden of the electric dust collector, seriously hindering the capture of fine particles and reducing the dust collection efficiency of the electric dust collector.
When the electrostatic precipitator collects low-specific-resistance particles, the low-specific-resistance particles reach the dust collecting polar plate due to good conductivity, electric charges obtained in the electric field can be rapidly released, electric charges with the same polarity as the polar plate are obtained after the polar plate releases the electric charges, and when the electrostatic force is greater than the adsorption force, the low-specific-resistance particles can be separated from the dust collecting polar plate and return to air flow. Then the electric field is charged again, the electric field is captured again, and the secondary dust can be generated finally when the polar plate jumps due to repeated charging. The scouring action of the ion wind makes the secondary dust raising phenomenon more severe.
When the electric dust collector collects high specific resistance particles, the particles have poor conductivity, so that after reaching the dust collecting polar plate, the charges absorbed in an electric field are released very slowly, when dust is accumulated on the dust collecting polar plate continuously, the charges in the dust layer are accumulated continuously to form an additional electric field opposite to the direction of an electric field of a discharge electrode, and when the field intensity reaches the gas breakdown field intensity in a gap of the dust layer, back corona can be generated. Due to the opposite electric field, the dust layer can generate repulsion action on subsequent charged particles, and the collection of the particulate matters is influenced. In addition, when back corona occurs, the dust layer breaks through the surface of the dust collecting electrode to cause serious secondary dust raising, and the originally deposited dust returns to the electric field again, so that the dust removal efficiency is also seriously reduced.
In order to improve the short plates displayed when the electric dust collector catches the above particle pollutants, for collecting the fine particles with the particle size less than 1 micron, a particle coagulation and wet-type electric dust collector mode is adopted; for high specific resistance dust, sulfuric acid, ammonia, diethylamine and sodium chloride are used for flue gas conditioning abroad. Although a good tempering effect can be obtained, secondary pollution is caused by sulfuric acid and ammonia, and equipment blockage is easily caused due to high toxicity of diethylamine and sodium chloride. The water-based conditioning agent is mainly researched in China, and the problems caused by the scheme can not be caused, but the new problems that the dust removal effect is influenced by large water spraying amount and the emission diffusion is not facilitated due to large smoke temperature drop are caused.
In order to improve the problems that the collection efficiency of the electric dust collector is not high due to the action of ion wind when fine particles are removed, and the secondary dust raising phenomenon is generated when the electric dust collector collects over-high and over-low specific resistance dust, and improve the application range of dust collection of the electric dust collector, the proper modification of the dust collection polar plate is a feasible scheme which is simple and easy to implement, reduces economic investment and solves the problems without secondary pollution.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to improve the capture of fine particles with lower dust removal efficiency of the traditional electric dust remover by using the anode plate for assisting dust collection by using the ion wind, and improve the integral dust removal efficiency of the electric dust remover by using the double-electric-field electric dust remover for assisting dust collection by using the ion wind.
The second purpose of the invention is to utilize the electrostatic shielding effect formed by the dust collecting cavity on the anode plate to inhibit the secondary dust raising phenomenon generated by low specific resistance and the back corona phenomenon generated by high specific resistance dust, thereby widening the application range of the electric dust collector to the dust specific resistance.
The invention is realized by the following technical scheme.
An electric dust collector using ion wind to assist dust collection comprises a front electric field and a rear electric field which are formed by symmetrically arranging a plurality of pairs of dust collection polar plates of the electric dust collector with the same structure;
the burr line discharge electrodes are distributed between the dust collection polar plates of the electric dust collector in the front electric field, long groove-shaped frame-shaped plates with symmetrical structures are arranged on the inner sides of the dust collection polar plates of the electric dust collector behind the burr line discharge electrodes to form a cavity, and the opening direction of the cavity faces to an airflow inlet;
round wire discharge electrodes are distributed between dust collecting polar plates of the electric dust collector in the rear electric field;
the arrangement width of the dust collecting polar plate interval of the front electric field electric dust collector is smaller than that of the dust collecting polar plate interval of the rear electric field electric dust collector.
With respect to the above technical solutions, the present invention has a further preferable solution:
preferably, the arrangement width of the distance between the dust collecting polar plates of the front electric field electric dust collector is 250-300 mm.
Preferably, the arrangement width of the distance between the dust collecting polar plates of the electric dust collector of the rear electric field is more than or equal to 400 mm.
Preferably, the section of the elongated-groove-shaped frame-shaped plate forming the cavity is a polygon with an opening at one side, and the polygon comprises a triangle, a rectangle or a pentagon.
Preferably, the bur line discharge electrode is arranged opposite to the central line of the dust collection polar plate of the electric dust collector, and the length of the bur line discharge electrode is consistent with the height of the dust collection polar plate of the electric dust collector.
Preferably, the barbed wire discharge electrode is an angle steel barbed wire, a triangular barbed wire, a flat steel barbed wire, a sawtooth barbed wire or an RS type barbed wire.
Preferably, the material of the long groove-shaped cavity is stainless steel.
Preferably, the round wire discharge electrodes are arranged between dust collecting pole plates of the electric field electrostatic precipitator and at least 2 round wire discharge electrodes are arranged in the front and back direction along the airflow direction.
The dust collecting polar plate adopted by the electric dust collector comprises a panel and end plates, wherein the end plates are connected to two ends of the panel, the end plates are cambered plates, the sections of one ends of the cambered plates are in a trapezoidal bow shape, one ends of the cambered plates are bent and opened, and the openings face the back side of airflow flowing direction.
Preferably, the panel is a flat plate or a corrugated plate.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
the invention utilizes the anode plate with the ion wind auxiliary dust collection to improve the capture of fine particles. The particles entering the electric dust collector are wrapped by the ion wind, the moving direction is changed, and a vortex is formed in the flow field. In addition, because the charging of the fine particles is poor, the fine particles are not easy to be trapped by the dust collecting polar plate, and finally leave the charging channel of the electric dust collector along with the main flow. The ion wind is utilized to guide particles to move, a cavity device is arranged on the dust collecting polar plate in the downstream direction of the main flow, an included angle is formed between the cavity device and the discharge electrode, fine particles carried by the ion wind can be collected, and the fine particles are sealed in the cavity.
The dust with low specific resistance has better conductivity, after the polar plate releases charges, the charges with the same polarity as the polar plate are obtained, the electrostatic force is larger than the adsorption force, the dust can be separated from the dust collection polar plate, the return air flow is charged again in the electric field and is captured again, and the steps are repeated, and jump on the surface of the polar plate. The acting force parallel to the polar plate formed by the airflow existing in the electric field scours the low specific resistance dust to generate secondary dust raising, so that the particulate matters return to the flow field and finally separate from the electric dust collector. And the zero-electric-field cavity devices with openings on one sides, the heights of which are equal to the height of the polar plate, are arranged on the two sides of the polar plate, so that low-specific-resistance dust moving on the dust collecting polar plate can be trapped in the cavities to be collected, and secondary dust raising is restrained.
The high specific resistance dust has poor conductivity, and after the particles reach the dust collecting polar plate, the charges absorbed in the electric field are released very slowly, so that the charges are accumulated in the dust layer continuously when the dust is accumulated on the dust collecting polar plate continuously, an additional electric field opposite to the direction of the dust collecting electric field is formed, and when the field intensity reaches the gas breakdown field intensity in the gap of the dust layer, and the dust layer is broken down, serious secondary dust raising can be caused on the surface of the dust collecting polar plate. The cavity device intercepts high specific resistance dust in the cavity, and the inside of the cavity is a zero electric field, so that the breakdown cannot be formed again.
According to the double-electric-field electric dust collector for assisting dust collection by utilizing the ionic wind, in the former electric field, fine particles can be better charged by the electric dust collector at a narrow interval, and the cavities on the dust collection polar plates can collect dust washed on the surfaces of the polar plates due to the wrapping effect of the ionic wind; meanwhile, the electrostatic shielding effect in the cavity can inhibit the secondary dust raising phenomenon generated by high and low specific resistance; the latter electric field can be collected the great particulate matter of particle size that the former electric field escaped for the secondary, consequently can improve dust collection efficiency on traditional electrostatic precipitator's basis. The position of the cavity is determined according to the action rule of the ionic wind generated by the electric dust collector under different plate intervals.
The invention can weaken the negative effect of ion wind on the collection efficiency of granular pollutants, and can manufacture the dust collecting polar plate with the cavity or simply reform the existing dust collecting polar plate according to the action direction of the ion wind, so that fine particles influenced by the action force of the ion wind enter the cavity device of the dust collecting polar plate, and the dust removal efficiency of the electric dust remover is improved.
The invention can expand the application range of the traditional electric dust collector, on one hand, the invention can eliminate the scouring action of the ion wind on the dust collecting polar plate and inhibit the dust from rising from the polar plate; on the other hand, the dust with low specific resistance can effectively inhibit the secondary dust raising phenomenon, and the dust removal efficiency is further improved; for high specific resistance dust, secondary dust raising caused by back corona can be inhibited, and the application range of the traditional electric dust collector to the specific resistance of the dust is widened.
The invention utilizes the ion wind to assist in pole plate transformation, is convenient to manufacture and install, can be transformed under the condition of not changing other components of the electric dust collector, reduces the investment and simultaneously achieves better dust removal effect.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention:
FIG. 1 is a top view of the interior of an electric dust collector with a cavity and a dust collecting pole plate reformed by the cavity;
FIG. 2 is a schematic view of an electrostatic precipitator pole arrangement obtained by cavity modification;
FIG. 3 is a graph of ion wind guiding particle motion trajectory;
FIG. 4 is a comparison graph of the ion wind-guided particle motion trajectory of the electric dust collector simulated by CFD software and the experimentally obtained ion wind-guided particle motion trajectory of the electric dust collector;
fig. 5 is a schematic view of using ion wind to assist fine particles entering a cavity.
In the figure, 1, a dust collecting pole plate of an electric dust collector, 2, a cavity, 3, a burred wire discharge electrode, 4, particles and an air flow direction, 5, a central line of the dust collecting pole plate of the electric dust collector, 6 and a round wire discharge electrode.
Detailed Description
The present invention will now be described in detail with reference to the drawings and specific embodiments, wherein the exemplary embodiments and descriptions of the present invention are provided to explain the present invention without limiting the invention thereto.
As shown in fig. 1 and 2, an embodiment of the present invention provides an electric dust collector using ionic wind to assist dust collection, including a front electric field and a rear electric field formed by symmetrically arranging a plurality of pairs of dust collection pole plates 1 of the electric dust collector with the same structure, where the dust collection pole plates 1 of the electric dust collector are a panel and end plates, the end plates are connected to two ends of the panel, the end plates are bow-shaped plates, the cross section of one end of each bow-shaped plate is in a trapezoidal bow shape, one end of each bow-shaped plate is bent and opened, the opening faces the airflow flow direction back side, the end plates are used for increasing the rigidity of. The panel is a flat plate or a corrugated plate. The front electric field is at an air flow inlet, particles and the air flow direction 4 are shown in figure 1, and the arrangement width of the distance between the dust collecting polar plates 1 of the electric dust collector is smaller than that of the distance between the dust collecting polar plates 1 of the electric dust collector of the rear electric field. When the homopolar interval of the electric dust collector is narrow, the current density in the space is large, the electric charge of fine particle pollutants is easier, and the stronger the ion wind action is, so that the electric dust collector is beneficial to collecting fine particles by utilizing the long-groove frame-shaped plate. The wider interval is adopted by the rear electric field, the more stable the average electric field intensity in the space is, the effect of the ion wind is weakened, and the collection of the dust with larger particle size is facilitated. Circular wire discharge electrodes 6 are arranged between the dust collecting polar plates 1 of the rear electric field electric dust collector, the circular wire discharge electrodes are arranged between the dust collecting polar plates of the rear electric field electric dust collector, and at least 2 circular wire discharge electrodes are arranged and arranged front and back along the flow direction of air flow. The back electric field is an electric field generated by matching wide spacing (more than or equal to 400mm) and weak discharge electrodes; prickle wire discharge electrodes 3 are arranged between dust collection polar plates 1 of the front electric field electric dust collector, and the front electric field is matched with the strong discharge electrodes by the polar plates to construct an electric field in a narrow-spacing (250-300mm) pole matching form.
Wherein, a long-groove-shaped frame-shaped plate forming cavity 2 is arranged at the inner side of the dust collecting polar plate 1 of the electric dust collector at the rear part of the barbed wire discharge electrode 3. The long-groove-shaped frame-shaped plate is vertically downward from the top of the dust collecting polar plate and is fixed on the dust collecting polar plates at two sides of the electric dust collector, so that fine particles carried by ion wind can be conveniently collected.
In one embodiment, the cavity in the shape of a long groove is made of stainless steel, and the cross section of the cavity is triangular, rectangular or polygonal with one side open. The cavities parallelly fixed on the dust collecting polar plates on the two sides are completely the same, the length is consistent with the height of the polar plates, the depth is 30-60mm, and the width is 20-50 mm. The particles can be guided into the cavity by the action of ion wind, so that the escape phenomenon of fine particles is reduced. Meanwhile, the cavity is deep enough and the inner part of the cavity is a zero electric field area, so that secondary dust raising phenomenon caused by dust entering the cavity can be inhibited to be separated from the constraint of the cavity.
In the embodiment, the cavity 2 is open at the upper end and the lower end and is open towards the airflow side, and the other sides are closed. Therefore, the scouring action of the ion wind on the deposited particles and secondary dust raising are inhibited, and the fine particles and high and low specific resistance dust on the polar plate can be effectively sealed in the cavity (figure 4), so that the capture efficiency of the fine particles is improved, and the application range of the traditional electric dust collector to dust with different specific resistances is expanded.
In the embodiment, the cavity 2 is not overlapped with the prickle wire discharge electrode 3, the prickle wire discharge electrode 3 is arranged opposite to the position of a central line 5 of a dust collecting polar plate of the electric dust collector, the downstream of the air flow of the cavity is 50-100mm away from the central line of the polar plate, the depth is 30-60mm, the width is 20-50mm, the length is consistent with the height of the dust collecting polar plate, and the generation position of ion wind around the discharge electrode appears at different positions of the downstream of the discharge electrode when the operation conditions such as power supply voltage are changed. Dust particles under the action of the ion wind impact the dust collecting polar plate at a certain angle. According to model experiments and numerical simulation, the cavity is arranged at the downstream of the discharge electrode and is 50-100mm away from the center line of the polar plate, so that the micro-particles can be contained in the cavity with the maximum efficiency. The optimal installation position can be selected according to different ion wind action rules, and one side of the opening faces to the airflow inlet. The cross-sectional shape of the cavity may be triangular, rectangular or polygonal (pentagonal, etc.). The prickle wire discharge electrode 3 can be an angle steel prickle wire, a triangular prickle wire, a flat steel prickle wire, a sawtooth prickle wire or an RS type prickle wire.
The electric dust collector is provided with dust collecting polar plates with opposite plate surfaces, which are arranged on two sides of the dust collector. The polar plate of the front electric field is reformed by an ion wind auxiliary cavity, the narrow space is adopted, and the discharge electrode adopts a prickle line with stronger discharge to form an electric field aiming at micro-fine particles and high and low specific resistance particles; the front electric field is in a narrow-spacing (250-300mm) condition; the rear electric field adopts a traditional polar plate arranged at a wide interval, and adopts a discharging line with weak discharging, such as a round line and a star line, so as to carry out charged trapping on coarse particles which are not trapped by the front electric field again. The back electric field matches the weak discharge line with the traditional polar plate and is formed under the condition that the plate interval is wide (400-. When homopolar interval is narrower, discharge electrode discharge intensity is greater, and the gas ionization is complete, and the current density in the space is bigger, improves fine particle charge volume, and the effect of ion wind is stronger simultaneously, utilizes ion wind guide particle to get into the cavity, and the effect of cavity on the board just lies in improving the entrapment of fine particle, can not produce the secondary raise dust simultaneously again. The wider interval is adopted by the rear electric field, the more stable the average electric field intensity in the space is, the ion wind effect is weakened, and the particle pollutants with larger particle sizes are directly trapped on the polar plate. The electric dust remover with the narrow and wide polar distances matched with the electric field can effectively trap fine particles by utilizing ion wind generated by discharge on one hand, and can improve the dust removal efficiency of the electric dust remover on high-specific resistance dust and low-specific resistance dust by utilizing the electrostatic shielding effect of the cavity on the other hand, thereby expanding the application range of the electric dust remover on the dust with different specific resistances; the electric field generated by the polar matching mode is used for trapping dust with larger grain diameter which is not trapped in the electric field before, thereby improving the whole dust collection efficiency.
The working voltage of the electric dust collector is 55-75 KV, a plurality of discharge electrodes in different linear shapes are arranged in the middle, the distance between dust collection polar plates is variable, and the distance between front and rear electric field polar plates is different.
As shown in fig. 3, the particles change their moving direction under the action of the ion wind around the discharge electrode, and impact the dust collecting plate in the form of high-speed particle flow and move along the dust collecting plate. The cavity is fixed on the polar plate, and the particles are all retained in the cavity, so that the dust removal efficiency is improved.
As shown in fig. 4, the simulation result shows the movement process of the particles under the action of the ion wind, and the movement rule is consistent with the experimental result, so that a theoretical basis is provided for the arrangement of the dust collection cavity.
As shown in FIG. 5, the strip-shaped groove-shaped frame plate on the dust collecting polar plate reformed by the invention can collect the fine particles with the movement direction changed by the action of ion wind, and the particles are sealed in the cavity, thereby improving the dust collecting efficiency.
The present invention is not limited to the above-mentioned embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and modifications to some technical features without creative efforts according to the disclosed technical contents, and these substitutions and modifications are all within the protection scope of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110316159.4A CN112934463B (en) | 2021-03-24 | 2021-03-24 | Electric dust collector and pole plate using ion wind to assist dust collection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110316159.4A CN112934463B (en) | 2021-03-24 | 2021-03-24 | Electric dust collector and pole plate using ion wind to assist dust collection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112934463A true CN112934463A (en) | 2021-06-11 |
| CN112934463B CN112934463B (en) | 2024-10-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113908991A (en) * | 2021-11-08 | 2022-01-11 | 上海东震冶金工程技术有限公司 | Electrostatic precipitator utmost point outfit that gathers dust is assisted to ionic wind |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2644001Y (en) * | 2003-08-27 | 2004-09-29 | 高香林 | Corona wire with dust collecting and windbreak function |
| CN202037070U (en) * | 2010-11-29 | 2011-11-16 | 江苏紫光吉地达环境科技股份有限公司 | Electrostatic ultrafine dust collector |
| CN205146455U (en) * | 2015-11-06 | 2016-04-13 | 廖世平 | Collection dirt filter and electrostatic precipitator |
| CN105772220A (en) * | 2016-05-11 | 2016-07-20 | 福建欣隆环保有限公司 | Multi-pole distribution combination type current inversion efficient electric precipitator |
| WO2020026369A1 (en) * | 2018-08-01 | 2020-02-06 | 三菱日立パワーシステムズ環境ソリューション株式会社 | Electrostatic precipitator |
| CN111632765A (en) * | 2020-05-19 | 2020-09-08 | 浙江菲达环保科技股份有限公司 | Anode device for strengthening fine particles and aerosol trapping in dry and wet flue gas environment |
| CN111905929A (en) * | 2020-07-20 | 2020-11-10 | 河北大学 | Aspect ratio resistance and fine dust electrostatic precipitator and distribution method of dust removal electrode |
| CN214811725U (en) * | 2021-03-24 | 2021-11-23 | 西安建筑科技大学 | Electric dust collector and polar plate using ion wind to assist dust collection |
-
2021
- 2021-03-24 CN CN202110316159.4A patent/CN112934463B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2644001Y (en) * | 2003-08-27 | 2004-09-29 | 高香林 | Corona wire with dust collecting and windbreak function |
| CN202037070U (en) * | 2010-11-29 | 2011-11-16 | 江苏紫光吉地达环境科技股份有限公司 | Electrostatic ultrafine dust collector |
| CN205146455U (en) * | 2015-11-06 | 2016-04-13 | 廖世平 | Collection dirt filter and electrostatic precipitator |
| CN105772220A (en) * | 2016-05-11 | 2016-07-20 | 福建欣隆环保有限公司 | Multi-pole distribution combination type current inversion efficient electric precipitator |
| WO2020026369A1 (en) * | 2018-08-01 | 2020-02-06 | 三菱日立パワーシステムズ環境ソリューション株式会社 | Electrostatic precipitator |
| CN111632765A (en) * | 2020-05-19 | 2020-09-08 | 浙江菲达环保科技股份有限公司 | Anode device for strengthening fine particles and aerosol trapping in dry and wet flue gas environment |
| CN111905929A (en) * | 2020-07-20 | 2020-11-10 | 河北大学 | Aspect ratio resistance and fine dust electrostatic precipitator and distribution method of dust removal electrode |
| CN214811725U (en) * | 2021-03-24 | 2021-11-23 | 西安建筑科技大学 | Electric dust collector and polar plate using ion wind to assist dust collection |
Non-Patent Citations (1)
| Title |
|---|
| 赵强;岳文文;康永刚;刘志强;李庆;张子生;: "电晕线间距对电除尘器内空间电流影响的研究", 华北煤炭医学院学报, no. 04, 20 July 2009 (2009-07-20) * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113908991A (en) * | 2021-11-08 | 2022-01-11 | 上海东震冶金工程技术有限公司 | Electrostatic precipitator utmost point outfit that gathers dust is assisted to ionic wind |
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