CN211359193U - Electric dust collector suitable for high specific resistance working condition - Google Patents
Electric dust collector suitable for high specific resistance working condition Download PDFInfo
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- CN211359193U CN211359193U CN201921785487.3U CN201921785487U CN211359193U CN 211359193 U CN211359193 U CN 211359193U CN 201921785487 U CN201921785487 U CN 201921785487U CN 211359193 U CN211359193 U CN 211359193U
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- specific resistance
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- 239000000428 dust Substances 0.000 title claims abstract description 160
- 230000005684 electric field Effects 0.000 claims abstract description 39
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000003546 flue gas Substances 0.000 claims abstract description 23
- 239000012717 electrostatic precipitator Substances 0.000 claims abstract description 5
- 230000002146 bilateral effect Effects 0.000 claims 1
- 239000012716 precipitator Substances 0.000 abstract description 4
- 230000002349 favourable effect Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract 2
- 239000002245 particle Substances 0.000 description 13
- 150000002500 ions Chemical class 0.000 description 9
- 239000000779 smoke Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000000443 aerosol Substances 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 1
- 230000005686 electrostatic field Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
The utility model relates to an electrostatic precipitator suitable for high specific resistance operating mode, include flue gas dust collector includes: the cathode rows are arranged in parallel along the airflow direction, and each cathode row is provided with a plurality of cathode discharge needles; the anode rows and the cathode rows are arranged in a staggered and parallel mode; a first electric field is generated between the anode row and the cathode discharge needles; the rapping devices are arranged on the cathode row and the anode row; n auxiliary dust collecting devices are arranged at the tail end of each anode row and used for collecting secondary raised dust generated by rapping; and a third electric field is generated between the auxiliary dust collecting device and the cathode row. This application increases supplementary dust arrester installation at the end that the positive pole was arranged, forms the third electric field between supplementary dust arrester installation and the negative pole discharge needle, has strengthened the terminal electric field intensity of negative pole row, is favorable to collecting the higher dust of specific resistance and the application scope that electric precipitator has increased dust specific resistance with thinner dust.
Description
Technical Field
The utility model relates to an electric precipitation field especially relates to an electric precipitator suitable for high specific resistance operating mode.
Background
The electric dust collector is used as a high-efficiency flue gas dust collecting device, is commonly applied to various industries in China, and is also commonly applied to power plant boilers and various industrial high-temperature kilns at present, such as cement plant kiln tail electric dust collectors, kiln head electric dust collectors, steel plant sintering machine head electric dust collectors, sintering machine tail electric dust collectors, aluminum plant roasting kiln head electric dust collectors, copper smelting furnace head electric dust collectors and various nonferrous metal roasting furnaces. Due to the improvement of domestic environmental protection consciousness and emission standard, the requirement of ultralow dust emission in each region is less than 10mg/m3The current standard smoke dust emission concentration of the electric dust collector is controlled to be less than 100mg/m3The discharge requirement is far from being met, but for the working conditions of a high-temperature kiln and high-specific-resistance dust, due to the limitation of temperature, the materials of the cloth bags cannot be met, and the phenomena of fire and scorching of a plurality of cloth bag dust collectors are often caused. Therefore, the improvement of the electric dust remover and the further reduction of the emission concentration of the flue gas and the dust of the electric dust remover become problems to be solved in the field of dust removal.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve under the high specific resistance operating mode, the low technical problem of flue gas dust collection efficiency, the utility model provides an electrostatic precipitator suitable for high specific resistance operating mode.
The utility model discloses a following technical scheme realizes above-mentioned purpose: the utility model provides an electrostatic precipitator suitable for high specific resistance operating mode, includes the box, and the box both ends are equipped with air intake and air outlet, and the inside flue gas dust collector that is equipped with of box, flue gas dust collector include: the cathode rows are arranged in parallel along the airflow direction, and each cathode row is provided with a plurality of cathode discharge needles; the anode rows and the cathode rows are arranged in a staggered and parallel mode; a first electric field is generated between the anode row and the cathode discharge needles; n auxiliary dust collecting devices are arranged at the tail end of each anode row and used for collecting secondary raised dust generated by rapping; and a third electric field is generated between the auxiliary dust collecting device and the cathode row.
Further, a third auxiliary electrode is arranged between the adjacent cathode discharge needles.
Furthermore, the auxiliary dust collecting device is of a frame structure with one side open towards the anode row, and a plurality of air holes are formed in the body of the auxiliary dust collecting device.
Furthermore, the auxiliary dust collecting devices are arranged symmetrically left and right relative to the anode row.
Further, a gap is reserved between the adjacent auxiliary dust collecting devices.
Furthermore, the auxiliary dust collecting device is connected with the tail end of the anode row through a first supporting structure, and the distance between the first supporting structure and the adjacent cathode row and the distance between the first supporting structure and the adjacent anode row are consistent.
Further, the anode row comprises a second frame and a plurality of anode tubes arranged in the second frame side by side, and the plurality of anode tubes are arranged at equal intervals.
Furthermore, the flue gas dust removal device also comprises a rapping device which is arranged on the cathode row and the anode row and is used for rapping the cathode row and the anode row and cleaning dust attached to the cathode row and the anode row.
Compared with the prior art, the beneficial effects of the utility model are as follows: the effective theory and the actual of the movement route and the speed of the charged dust and the charged aerosol particles are combined, and the electric field intensity of an electric field between adjacent cathode discharge needles is weakened by arranging the third auxiliary electrode between the cathode discharge needles. The negative ion flow migrates to the dust collecting electrode, and the positive ion flow is neutralized near the discharge needle point and on the surface of the third auxiliary electrode. The auxiliary dust collecting device is additionally arranged at the tail end of the anode row, a third electric field is formed between the auxiliary dust collecting device and the cathode discharge needle, the third electric field generated by the auxiliary dust collecting device is adopted, the electric field strength at the tail end of the cathode row is enhanced, the ion flow is weak, the collection of dust with higher specific resistance and fine dust is facilitated, the generation of a back corona phenomenon is delayed, and the application range of the electric dust collector to the dust specific resistance is enlarged.
Drawings
FIG. 1 is a top view of an electrical precipitator of the present application;
FIG. 2 is a partial schematic view of FIG. 1;
FIG. 3 is a side view of the electrical precipitator of FIG. 1;
FIG. 4 is a distribution diagram of electric field intensity inside the dust removing device;
FIG. 5 is a schematic view of a dust sequential charge collection process;
FIG. 6 is a schematic view of a secondary fugitive dust collection route;
figure 7 is a dusty gas flow scheme.
The reference numerals are explained below:
in the figure: 100. the device comprises an air inlet 200, a flue gas dust removal device 300, an air outlet 210, an anode row 220, a cathode row 230, an auxiliary dust collection device 240, a first support structure 211, a cathode discharge needle 212, a third auxiliary electrode 221 and an anode tube.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
summary of the application
The principle of the electric dust collector is that negative high voltage is applied to the cathode of an internal battery, so that electric field air is ionized to generate electric charges, smoke dust collides with the electric charges when passing through the electric field to realize charge, electrostatic field force between an anode and a cathode collects the charged smoke dust to an anode row and the cathode, negative electric dust is driven towards the anode, and positive electric dust is driven towards the cathode, so that the purpose of electrostatic dust collection is achieved.
The electric dust collector generally adopts a vibration mode to clean dust, and the vibration has great influence on the dust removal efficiency of the electric dust collector. The impact of the rapping period on the dust removal efficiency is whether the falling dust cake can fall into the ash hopper directly during ash removal. The dust can be dispersed into broken powder and fall down during rapping, so that larger secondary dust is caused, namely, the dust deposited on the anode row and the cathode row of the electric dust collector is taken out by the airflow again, and especially the secondary dust of a tail-electrode electric field can greatly reduce the efficiency of the electric dust collector. In addition, under the working conditions of high specific resistance, such as high dust, cement plants, kilns and other dust removal environments, dust is difficult to charge or cannot be charged, and often cannot be effectively captured, and can be quickly converted into secondary raise dust after rapping.
In addition, the theoretical model of the current electric dust collector running condition is obtained according to the theoretical average particle size of the talcum powder and the static condition of the transformer current and the working condition of the electric instrument, so that dust is generated among all parallel channels, because the distance between dust-containing particles and a polar row is different, the stress of the particles close to the polar row is large, and the relative stress of the particles far from the polar row is small. The gas flow direction theoretically moves forwards in each respective channel in parallel with the dust collection polar row, dust particles almost move far away from the polar row and have a long distance required by coulomb's law, and the dust particles in the central layer of the channel generally rapidly impact the tail end of an electric field in a flow velocity field of about 1m/s, so that the dust particles with high specific resistance are serious, and form a component force of about 90 degrees with the polar direction of a power line and an electric wind, a large amount of corona power of the electric field is undoubtedly consumed, and the dust removal effect is naturally and relatively reduced.
In order to solve the technical problems, the electric dust collector suitable for the working condition of high specific resistance is provided, the effective theory and the actual of the movement route and the speed of charged dust and charged aerosol particles are combined, and the electric field intensity of an electric field between adjacent cathode discharge needles is weakened by arranging a third auxiliary electrode between the cathode discharge needles. As shown in fig. 4-7, the electrostatic precipitator is a dc electric field, which is discharged through the tips, and the power lines are shown as isobars, and the density of the lines represents the electric field strength. The higher the density of the electric line of force, the higher the representative electric field strength. The dust collecting electrode (corresponding to the anode plate and the grounding electrode) is composed of a 480C plate structure, the cathode discharge electrode (corresponding to the cathode discharge needle and connected with negative high voltage) is composed of a barbed wire and a spiral line, a first electric field is generated between the dust collecting electrode and the cathode discharge electrode, the first electric field is a double-area electric field which is repeatedly alternated, when the voltage of an external branch reaches a certain value, the needle point of the cathode discharge electrode starts corona discharge, a gas medium in the first electric field is ionized, and when the voltage is increased to a working value, ionized electrons and positive ions are accelerated to collide other neutral gas molecules, so that the avalanche reaction is generated. At the moment, negative ions flow to the dust collecting electrode to migrate, positive ion flow is neutralized near the discharge needle point and the surface of the third auxiliary electrode, strong ion wind is generated near the needle point, and after dust enters an electric field, ions moving in the electric field collide with the dust to charge dust particles.
And an auxiliary dust collecting device is additionally arranged at the tail end of the anode row, and a third electric field is formed between the auxiliary dust collecting device and the cathode discharge needle. In the conventional electric dust collector, the charging and dust collection of dust are carried out in the same space. However, in terms of charging, the larger the corona current is, the better the corona current is, for dust collection, the larger the corona current is not easy to adopt, and the high and uniform electric field intensity is required, particularly in a third electric field area, the dust specific resistance is dipolar, so that the contradiction of the charged dust collection in terms of the corona current is more prominent, but the third electric field generated by the auxiliary dust collection device is adopted, so that the electric field intensity at the tail end of the cathode row is enhanced, the ion flow is weak, the dust collection device is favorable for collecting the dust with higher specific resistance and the finer dust, and the back corona phenomenon is favorable for delaying, so that the application range of the electric dust collector to the dust specific resistance is enlarged. The flue gas can carry out the equidistance according to wind speed and electric field intensity and arrange for the wind speed can stride across the flue gas equidistance and reach the purpose in flue gas mixed flow disturbance swirl region. The air flow is shunted after entering the main channel between the anode row and the cathode row, flows to the auxiliary dust collecting device, makes the air around the dust collecting surface tend to be static, realizes that the dust cleaning is in an off-line mode, makes the dust particle approach in a nearly non-resistance state, and makes the secondary dust generated by vibration impossible to reversely float back to the entering main channel, and makes the turbulent flow state formed by the consistency motion of the dust particle flow in the conventional electric field not exist.
Having described the general principles of the present application, various non-limiting embodiments of the present application will now be described with particular reference to the accompanying drawings.
Exemplary devices
An electric dust collector, as shown in fig. 1-3, comprises a box body, wherein an air inlet 100 and an air outlet 300 are respectively arranged at two ends of the box body, a flue gas dust removing device 200 is arranged in the box body, flue gas flowing from the air inlet 100 is adsorbed and cleaned by the flue gas dust removing device 200, and the treated clean flue gas is discharged from the air outlet 300. The flue gas dust removal devices can be two groups which are arranged side by side along the direction of the air flow, each flue gas dust removal device comprises a cathode row 220, an anode row 210, a rapping device, an auxiliary dust collection device 230 and an ash collection bag, and the ash collection bag is arranged below the dust removal devices and used for collecting dust. The rapping device is used for rapping the cathode row and the anode row, shaking off dust attached to the cathode row and the anode row, and falling into the dust collecting bag.
The cathode rows and the anode rows are arranged in parallel along the airflow direction, the cathode rows and the anode rows are staggered and parallel, namely, each anode row is arranged between two adjacent cathode rows, or each cathode row is arranged between two adjacent anode rows. Each cathode row is provided with a plurality of cathode discharge needles, and a third auxiliary electrode is arranged between every two adjacent cathode discharge needles. The number of the third auxiliary electrodes can be set according to the difference of the channels through which the flue gas flows, more flue gas is located at the front section of the channel, more third auxiliary electrodes can be arranged, for example, three third auxiliary electrodes can be arranged between adjacent cathode discharge needles, less flue gas flows through the rear end of the channel, and fewer third auxiliary electrodes can be arranged, for example, two or one third auxiliary electrode can be arranged between adjacent cathode discharge needles.
The anode row comprises a second frame and a series of anode tubes which are arranged in the second frame at equal intervals, a first electric field is generated between the anode row and the cathode discharge needles, and the distance between every two adjacent cathode discharge needles is larger than that between every two adjacent anode tubes. And an auxiliary dust collecting device is arranged on an extension line of the second frame, namely the tail end of the anode row is extended, the anode row is connected with the auxiliary dust collecting device through a first supporting structure, and the first supporting structure can select the same frame structure as the second frame. The auxiliary dust collecting device is arranged into a frame structure with one side open towards the anode row, and a plurality of air holes are formed in the body of the auxiliary dust collecting device. Seen from the side, the smoke dust collector is similar to a vertically-arranged trapezoid groove, the left opening is large, the right opening is small, and smoke enters from the left opening and flows out of the air holes in the body when passing through the auxiliary dust collecting device. The auxiliary dust collecting device has the physical structural characteristic that the dust is difficult to enter an outlet channel from large to small, plays a role in dust pressing (secondary dust collection), and can effectively overcome secondary dust raising.
Through the miniaturization and semi-industrialization of a sample with the structure, and the combination of simulation data of the motion route and the speed of charged dust and charged aerosol particles in an electric field of computer bently simulation, the conclusion is drawn that the auxiliary dust collecting device can improve the mixed flow effect of a mixed flow area by more than 60%, improve the re-collecting and dust collecting effect of secondary dust emission of an anode row by more than 70%, and particularly have larger adaptability breadth of the secondary dust emission of the anode row under different vibration amplitude and frequency.
The auxiliary dust collecting device is connected with the tail end of the anode row through a first supporting structure, wherein the optimal length of the first supporting structure is close to the width of each main channel, if the length of the first supporting structure is set to be too short, resistance is generated on air flow, and if the length of the first supporting structure is set to be too short, the resistance on the air flow is weakened, but the dust collecting effect is weakened.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention.
Claims (8)
1. The utility model provides an electrostatic precipitator suitable for high specific resistance operating mode, includes the box, and the box both ends are equipped with air intake and air outlet, and the inside flue gas dust collector that is equipped with of box, its characterized in that, flue gas dust collector includes: the cathode rows are arranged in parallel along the airflow direction, and each cathode row is provided with a plurality of cathode discharge needles; the anode rows and the cathode rows are arranged in a staggered and parallel mode; a first electric field is generated between the anode row and the cathode discharge needles; the auxiliary dust collecting device is arranged at the tail end of each anode row and is used for collecting secondary raised dust generated by rapping; and a third electric field is generated between the auxiliary dust collecting device and the cathode row.
2. The electric dust collector suitable for the working condition of high specific resistance as claimed in claim 1, wherein a third auxiliary electrode is arranged between adjacent cathode discharge needles.
3. The electric dust collector suitable for the working condition of high specific resistance according to claim 1 or 2, wherein the auxiliary dust collecting device is of a frame structure with one side open towards the anode row, and a plurality of air holes are formed in the body of the auxiliary dust collecting device.
4. The electric dust collector suitable for the working condition of high specific resistance according to claim 3, wherein the auxiliary dust collecting devices are arranged in bilateral symmetry relative to the anode row.
5. An electric dust collector suitable for high specific resistance working conditions according to claim 3, wherein a gap is reserved between adjacent auxiliary dust collecting devices.
6. The electric dust collector suitable for the working condition of high specific resistance according to claim 2, wherein the auxiliary dust collecting device is connected with the tail end of the anode row through a first supporting structure, and the distance between the first supporting structure and the adjacent cathode row and the distance between the first supporting structure and the adjacent anode row are consistent.
7. The electric dust collector suitable for the working condition of high specific resistance of claim 1, wherein the anode row comprises a second frame and a plurality of anode tubes arranged in the second frame side by side, and the anode tubes are arranged at equal intervals.
8. The electric dust collector suitable for the working condition of high specific resistance according to claim 2, wherein the flue gas dust removing device further comprises a rapping device, which is arranged on the cathode row and the anode row and used for rapping the cathode row and the anode row, and the dust attached to the cathode row and the anode row is cleaned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921785487.3U CN211359193U (en) | 2019-10-23 | 2019-10-23 | Electric dust collector suitable for high specific resistance working condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921785487.3U CN211359193U (en) | 2019-10-23 | 2019-10-23 | Electric dust collector suitable for high specific resistance working condition |
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| Publication Number | Publication Date |
|---|---|
| CN211359193U true CN211359193U (en) | 2020-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921785487.3U Expired - Fee Related CN211359193U (en) | 2019-10-23 | 2019-10-23 | Electric dust collector suitable for high specific resistance working condition |
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| Country | Link |
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| CN (1) | CN211359193U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110653067A (en) * | 2019-10-23 | 2020-01-07 | 浙江先创能源科技股份有限公司 | Electric dust collector suitable for high specific resistance working condition |
| WO2022000871A1 (en) * | 2020-06-30 | 2022-01-06 | 上海必修福企业管理有限公司 | Electric field unit, electric field adsorption device, and electric field device |
| CN114308389A (en) * | 2021-06-29 | 2022-04-12 | 福建欣隆环保股份有限公司 | High-efficient electrically conductive filter cell electrostatic precipitator |
-
2019
- 2019-10-23 CN CN201921785487.3U patent/CN211359193U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110653067A (en) * | 2019-10-23 | 2020-01-07 | 浙江先创能源科技股份有限公司 | Electric dust collector suitable for high specific resistance working condition |
| WO2022000871A1 (en) * | 2020-06-30 | 2022-01-06 | 上海必修福企业管理有限公司 | Electric field unit, electric field adsorption device, and electric field device |
| CN114308389A (en) * | 2021-06-29 | 2022-04-12 | 福建欣隆环保股份有限公司 | High-efficient electrically conductive filter cell electrostatic precipitator |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200828 |
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| CF01 | Termination of patent right due to non-payment of annual fee |