CN202700653U - Discharge electrode of electrostatic precipitator - Google Patents
Discharge electrode of electrostatic precipitator Download PDFInfo
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- CN202700653U CN202700653U CN 201220341293 CN201220341293U CN202700653U CN 202700653 U CN202700653 U CN 202700653U CN 201220341293 CN201220341293 CN 201220341293 CN 201220341293 U CN201220341293 U CN 201220341293U CN 202700653 U CN202700653 U CN 202700653U
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- discharge electrode
- trunk
- sawtooth
- discharge
- described discharge
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Abstract
The utility model discloses a discharge electrode of an electrostatic precipitator. The discharge electrode comprises at least one discharge electrode trunk and at least one saw tooth which is distributed on a side edge of the discharge electrode trunk, wherein the discharge electrode is formed to be saw-toothed through stamping; the saw tooth can be bent, so that the saw tooth at a discharge point forms a certain angle with the plane of the discharge electrode trunk, thereby improving the current density and the distribution uniformity; and meanwhile, the mechanical strength and the economy of the discharge electrode are obviously improved, and the critical coronal voltage is effectively reduced. The discharge electrode can be used in various discharge structures such as electrostatic precipitators and electric defoggers, and can be used for controlling pollutants such as water fog, smoke dust and sulfur trioxide aerosol in smoke of various types of coal fired boilers or incinerators and the like.
Description
Technical field
The utility model belongs to environmental protection and waste gas purification technical field, relates in particular to the discharge electrode for electric cleaner.
Background technology
Contain a large amount of flue dust, aerosol (water smoke, acid mist, escape ammonia etc.) in the flue gas, the most frequently used technology is to realize demist, dedusting by electric cleaner (ESP) at present, its principle is that discharge ionization makes particle charged, thereby makes it under electric field action, is adsorbed in pole plate.
Discharge electrode is the parts that produce corona current in electric field, because the point effect of discharge electrode, field intensity is high especially near it, thereby makes electronics obtain enough kinetic energy, and ionized gas, the electronics that is inspired and the electronics that once participated in ionizing can ionize by sustainable participation, electric charge number increases sharply, and simultaneously, cation also can participate in ionization process, therefore the quality of discharge electrode performance directly has influence on dedusting, demist efficient.
For discharge electrode, under identical working condition, should possess following characteristic: solid and reliable, mechanical strength is large, does not break, and does not go offline; Electric property is good, changes size and the distribution of discharge inception voltage, electric current and electric-field intensity; VA characteristic curve is desirable; Simple in structure, easy to manufacture, cost is low.
Common discharge electrode has tubular prickle wire, astroid, jaggies, fish-bone acupuncture line, helix and angle steel prickle wire, because tubular prickle wire low cost of manufacture, discharge inception voltage is low, at present its being most widely used at home, but the electric current per unit length of this line is even not, reduce effective specific collection area, changed two spinules into four prickles at the prickle root, can partly solve its drawback; What range of application was only second to tubular prickle wire is jaggies, and its discharge inception voltage is low, C-V characteristic good, and is easy to manufacture, and cost is low, but outage is higher.
The utility model content
The purpose of this utility model is that the structure of existing discharge electrode is improved, and better realizes flue gas ash removal, demist, and the prior art products cost is high to overcome, inefficient defective.
A kind of discharge electrode of electric cleaner comprises at least one discharge electrode trunk, and is distributed at least one sawtooth on the discharge electrode trunk side.
Described discharge electrode can be single discharge electrode trunk, also can be the many discharge electrode trunks composition of mutually pegging graft.When adopting many discharge electrode trunks, have mounting groove on the trunk face of described discharge electrode trunk, described mounting groove and described discharge electrode trunk thickness adapt, and described discharge electrode is mutually pegged graft by two described discharge electrode trunks and is formed.This kind inserting mode reduces the production cost of many discharge electrodes trunk electrode, keeps former discharge electrode mechanical strength, can directly use existing discharge electrode to install and assemble.Many discharge electrode combinations are mainly used in the line core structure, and Electric Field Distribution is even between heteropole, has improved effective dedusting area, has also improved the effective rate of utilization of earthing pole simultaneously.
Further, described discharge electrode trunk two ends are provided with erecting by overhang, and its purposes has two, one for bearing loading and the mechanical load of Electrical Discharge Machine system in the electric field, and two insulate between discharge electrode system and the housing for making, and make the discharge electrode system be in the high-pressure work state.Described device is bolt, perforate or welding connecting tube, is fixed in the discharge electrode framework, and joint sleeve or pillar, finally is connected with high voltage supply system.
Further, facing of described sawtooth is shaped as triangle, is positioned at dual-side or the single side of described discharge electrode trunk, and the distance between the adjacent sawtooth is 10～100 millimeters, the length of described sawtooth is 50～500 millimeters, and the width of described discharge electrode trunk is 20～200 millimeters.
Further, the trunk planes overlapping of the sawtooth plane of described sawtooth and described discharge electrode trunk.When the sawtooth plane of described sawtooth does not overlap with the trunk plane of described discharge electrode trunk, the distribution mode of sawtooth on the discharge electrode trunk can be staggered heteropleural, be the dual-side that described sawtooth is positioned at described discharge electrode trunk, on any side, adjacent two sawtooth towards the opposite; Perhaps be bilateral heteropleural, namely on any side, institute is serrate towards identical, and the sawtooth of discharge electrode trunk dual-side is towards the opposite; Perhaps be bilateral homonymy, namely on any side, institute is serrate towards identical, and the sawtooth of described discharge electrode trunk dual-side is towards identical.
In existing discharge electrode structure, discharge inception voltage scope 15～35kV, electric current per unit length scope 0.87～2.02mA/m.Wherein, cast prickle wire discharge inception voltage 15kV, electric current per unit length 1.3mA/m, jaggies discharge inception voltage 20kV, electric current per unit length 1.88mA/m.The broached-tooth design of jaggies can reduce discharge inception voltage, and the effective corona discharge power in the unit interval is improved.
Simultaneously, because ground connection cylinder zone does not have discharge tip, do not produce corona discharge, having electric current at the ground connection pole plate is zero dead band.The staggered broached-tooth design that bends up that the utility model proposes, the discharge tip quantity of pointing to the ground connection cylinder is larger, and similar novel cast prickle wire structure has been avoided electric current dead band phenomenon, improve electric current per unit length uniformity and effective specific collection area, increased the effective rate of utilization of positive plate.This structure has namely improved dedusting demist efficient in the situation that does not change former die opening.
The discharge electrode structure of the electric cleaner that the utility model provides, the pollutants such as the sulfur trioxide in the flue gas, ammonia mist, flue dust fine particle and aerosol are purified control, have produce simple, cost is low, intensity is large, efficient is high, the large characteristics of current density on the unit length discharge electrode on high, the unit are of voltage.
Description of drawings
Fig. 1 a is the utility model discharge electrode structural representation;
Fig. 1 b is the discharge electrode structural representation that the utlity model has opening slot;
Fig. 1 c is the discharge electrode schematic diagram that two discharge electrode trunks of the utility model are pegged graft;
Fig. 2 a is the staggered heteropleural discharge electrode schematic diagram of the utility model;
Fig. 2 b is the bilateral heteropleural discharge electrode of the utility model schematic diagram;
Fig. 2 c is the bilateral homonymy discharge electrode of the utility model schematic diagram;
Fig. 2 d is the not crooked discharge electrode schematic diagram of the utility model sawtooth;
Fig. 3 is the arrangement schematic diagram of the utility model discharge electrode and heteropole;
Fig. 4 is the utility model embodiment electric cleaner structural representation.
The specific embodiment
Below in conjunction with drawings and Examples technical solutions of the utility model are described in further details, following examples do not consist of restriction of the present utility model.
As shown in Figure 1a, comprise discharge electrode trunk 2 and the sawtooth 3 that is positioned on discharge electrode trunk 2 sides for the utility model discharge electrode 1.Discharge electrode 1 is generally punch forming, the utility model discharge electrode 1 is general with the shaping of the punching of the steel plate about thickness 2～10mm, discharge electrode trunk 2 is an integral body with sawtooth 3 simultaneously punching out, sawtooth 3 length (summit is apart from trunk) can be 50～500mm, generally elect 100mm as, discharge electrode trunk 2 width can be 20～200mm, generally elect 100mm as.
Shown in Fig. 1 b, have mounting groove 4 on the trunk face of discharge electrode trunk 2, mounting groove 4 adapts with discharge electrode trunk 2 thickness, so that two discharge electrode trunks 2 are plugged in together mutually.
Need to prove that in actual applications, discharge electrode 1 can adopt single discharge electrode trunk 2, as shown in Figure 1a, also can adopt two discharge electrode trunks 2 mutually to peg graft and form a discharge electrode 1, shown in Fig. 1 c.Can also increase the quantity of discharge electrode trunk 2, such as discharge electrode 1 of three discharge electrode trunks, 2 combinations.When stamping, mounting groove 4 directly punching press out is insertion in the other direction with two discharge electrode trunks 2, can make two discharge electrode trunks 2 be at right angle setting, forms the discharge electrode 1 of 8 discharge tip.
Need to prove, the arrangement of sawtooth 3 on discharge electrode trunk 2 can be for both sides asymmetric or bilateral symmetry or only be positioned at discharge electrode trunk 2 one sides.On discharge electrode trunk 2 was one-sided, the distance between adjacent two sawtooth 3 can be 10～100mm, is generally 25～50mm, and during the asymmetric geometry of both sides, it is spaced apart to be generally both sides, to obtain more excellent Electric Field Distribution.
Particularly, sawtooth 3 is faced and is shaped as triangle, is specifically as follows isosceles triangle or right angled triangle, or other triangles.
As shown in Figure 2, for the utility model discharge electrode sawtooth towards distribution schematic diagram, shown several situations of discharge electrode trunk face with the relative distribution of serrated face.After discharge electrode is stamping, can keep serrated face to overlap with discharge electrode trunk face, also can make serrated face crooked by special machine, with discharge electrode trunk face at an angle, angle can be 0～360 °, is generally 135 ° or 225 °.For convenience's sake, in present specification, by serrated face and discharge electrode trunk face angle are determined sawtooth 3 towards, with serrated face and discharge electrode trunk face angle less than 180 ° sawtooth towards, outwards be called, with serrated face and discharge electrode trunk face angle greater than 180 ° sawtooth towards, inwardly be called, two kinds is opposite towards the pass.
Particularly, sawtooth 3 on discharge electrode trunk 2 towards distribution, be staggered heteropleural such as Fig. 2 a, staggered heteropleural refers to that sawtooth 3 is distributed in discharge electrode trunk 2 both sides, arbitrarily on one side on, adjacent two sawtooth 3 towards the opposite; Be bilateral heteropleural such as Fig. 2 b, bilateral heteropleural refers to that sawtooth 1 is distributed in discharge electrode trunk 2 both sides, arbitrarily on one side on, all sawtooth 3 towards identical, the sawtooth 3 on trunk 2 both sides is towards the opposite; Be depicted as bilateral homonymy such as Fig. 2 c, bilateral homonymy refers to that sawtooth 3 is distributed in discharge electrode trunk 2 both sides, on arbitrarily on one side, all sawtooth 3 towards identical, the sawtooth 3 on trunk 2 both sides is towards identical; Be depicted as not crookedly such as Fig. 2 d, the not crooked serrated face that refers to overlaps with discharge electrode trunk face.
Need to prove that the utility model is not limited to above-mentioned towards distribution form, can also be interval heteropleural, at random heteropleural or one-sided, or other any combination.The interval heteropleural refers to that sawtooth 3 is distributed in discharge electrode trunk 2 both sides, on arbitrarily on one side, interval m behind identical sawtooth 3, occur n with the previous dynasty to opposite sawtooth 3 (m, n are random natural number); Heteropleural phalanges saw tooth 3 is distributed in discharge electrode trunk 2 both sides at random, and on arbitrarily on one side, sawtooth 3 is towards at random; The one-sided sawtooth 3 that refers to only is distributed in discharge electrode trunk 2 on one side.In engineering was used, main staggered heteropleural, bilateral heteropleural, three kinds of sawtooth of bilateral homonymy of adopting were towards distribution mode.
Further, can burn-on bolt, tube connector or perforate in order to connect suspension and high voltage supply system at discharge electrode of the present utility model 1 two ends.
As Fig. 3 be the utility model discharge electrode 1 with the multiple deployment scenarios of heteropole 5 in electric cleaner under sectional view, solid line (---) is discharge electrode 1 among the figure, dotted line (---) is heteropole 5 (earthing pole).The arrangement of discharge electrode 1 and heteropole 5 can be for line board-like and line cartridge type, the line cartridge type can be round tube, rectangular tube and hexagonal tube etc., the discharge electrode number can be one, two, three or more.
Below to adopt heteropole 5 as square, discharge electrode 1 is that two discharge electrode trunks 2 are pegged graft, sawtooth 3 carries out the experiment effect explanation of flue gas ash removal, demist purification for the line cartridge type electric cleaner that staggered heteropleural forms is example.
Be illustrated in figure 4 as the utility model heteropole 5 (earthing pole) and be sectional view and the schematic diagram of the electric cleaner of vertical type square, insulator 6 is fixed in inside and outside electric cleaner housing 8 upper ends and the UNICOM among the figure.Insulator 6 makes insulation between discharge electrode system and the housing 8, and externally is connected with high voltage source 7, makes discharge electrode 1 be in the high-pressure work state.Insulator 6 is connected with erecting by overhang 9 inner, bears loading and other mechanical loads of discharge electrode 1 in the electric field.
A plurality of square heteropoles 5 are positioned at housing 8 inside, and discharge electrode 1 is arranged in heteropole 5 centers, and are connected with erecting by overhang 9, to obtain high pressure conditions and to hang stationary state.Discharge electrode 1 is two discharge electrode trunk forms, and sawtooth is oriented staggered heteropleural, shown in Fig. 2 a; Two discharge electrode trunks 2 are pegged graft mutually, mutually in vertical state, and shown in Fig. 1 c.
Embodiment 1:
Certain power plant uses the very square two discharge plume cartridge type electric cleaners of ground connection of the present utility model, particle, aerosol after the control desulfurization in the tail gas.Through behind the desulfurizing tower, exhaust gas volumn is 102.93 * 10 before the electric cleaner entrance
4Nm
3/ h (wet basis), flue-gas temperature≤50 ℃, SO
3Concentration 30mg/Nm
3, flying dust concentration 20mg/Nm
3(butt).
1. the high voltage that provides the three phase mains of energy to export to wet electrical dust precipitator is 100kV, electric current 2.0A;
2. the electric cleaner diameter is 13m, and electrode length 3.0m, earth electrode are rectangular tube, length of side 400mm, gap 100mm.Discharge electrode sawtooth length 100mm, spacing 25mm, discharge electrode trunk width 100mm.
3. flue gas flow rate 2.1m/s, flue gas is time of staying 1.4s in electric cleaner.Total specific collection area 3980m
2
4. above three-phase wet electrical dust precipitator has than specific collection area 14.0m
2/ (m
3/ s), ESP index 420 (kV/cm)
2m
2/ (m
3/ s).Current density 1.5mA/m on the unit are
2, voltage 6kV/cm on the unit length;
After testing, under above operating condition, can realize dirt discharging＜3mg/Nm
3, SO
3Discharging＜3mg/Nm
3, required technique rinse water＜20m
3/ h.Total efficiency of dust collection＞95%, in the classification dust-collecting efficiency, particle diameter is that the particle dust-collecting efficiency of 0.04 μ m reaches 100%, particle diameter is greater than the particle dust-collecting efficiency of 1 μ m＞98%.
Embodiment 2:
Certain power plant uses the very square two discharge plume cartridge type electric cleaners of ground connection of the present utility model, and particle, the aerosol in the tail gas after the control desulfurization.Discharge electrode, flue gas condition, three-phase wet electrical dust precipitator diameter are identical with practical embodiments 1.The earth electrode rectangular tube length of side changes to 800mm.
1. the high voltage that provides the three phase mains of energy to export to wet electrical dust precipitator changes to 120kV, electric current 1.8A;
2. above three-phase wet electrical dust precipitator has than specific collection area 7.0m
2/ (m
3/ s), ESP index 210 (kV/cm)
2m
2/ (m
3/ s);
After testing, under above operating condition, can realize dirt discharging＜5mg/Nm
3, SO
3Discharging＜5mg/Nm
3, required technique rinse water＜20m
3/ h.
Above embodiment is only in order to the technical solution of the utility model to be described but not limit it; in the situation that does not deviate from the utility model spirit and essence thereof; those of ordinary skill in the art work as can make according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the utility model.
Claims (8)
1. the discharge electrode of an electric cleaner, it is characterized in that, described discharge electrode (1) comprises at least one discharge electrode trunk (2), and be distributed at least one sawtooth (3) on discharge electrode trunk (2) side, have mounting groove (4) on the trunk face of described discharge electrode trunk (2), described mounting groove (4) adapts with described discharge electrode trunk (2) thickness.
2. discharge electrode according to claim 1 is characterized in that, described discharge electrode (1) is mutually pegged graft by two described discharge electrode trunks (2) and formed.
3. discharge electrode according to claim 1 is characterized in that, described discharge electrode trunk (2) two ends are provided with erecting by overhang (9), and described erecting by overhang (9) is bolt or perforate or welding connecting tube.
4. the described discharge electrode of arbitrary claim according to claim 1-3, it is characterized in that, facing of described sawtooth (3) is shaped as triangle, be positioned at dual-side or the single side of described discharge electrode trunk (2), distance between the adjacent sawtooth (3) is 10～100 millimeters, the length of described sawtooth (3) is 50～500 millimeters, and the width of described discharge electrode trunk (2) is 20～200 millimeters.
5. discharge electrode according to claim 4 is characterized in that, the trunk planes overlapping of the sawtooth plane of described sawtooth (3) and described discharge electrode trunk (2).
6. discharge electrode according to claim 4, it is characterized in that, the sawtooth plane of described sawtooth (3) does not overlap with the trunk plane of described discharge electrode trunk (2), described sawtooth (3) is positioned at the dual-side of described discharge electrode trunk (2), on any side, adjacent two sawtooth (3) towards the opposite.
7. discharge electrode according to claim 4, it is characterized in that, the sawtooth plane of described sawtooth (3) does not overlap with the trunk plane of described discharge electrode trunk (2), described sawtooth (3) is positioned at the dual-side of described discharge electrode trunk (2), on any side, all sawtooth (3) towards identical, the sawtooth (3) of discharge electrode trunk (2) dual-side is towards the opposite.
8. discharge electrode according to claim 4, it is characterized in that, the sawtooth plane of described sawtooth (3) does not overlap with the trunk plane of described discharge electrode trunk (2), described sawtooth (3) is positioned at the dual-side of described discharge electrode trunk (2), on any side, all sawtooth (3) towards identical, the sawtooth (3) of described discharge electrode trunk (2) dual-side is towards identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220341293 CN202700653U (en) | 2012-07-13 | 2012-07-13 | Discharge electrode of electrostatic precipitator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220341293 CN202700653U (en) | 2012-07-13 | 2012-07-13 | Discharge electrode of electrostatic precipitator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202700653U true CN202700653U (en) | 2013-01-30 |
Family
ID=47580993
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220341293 Expired - Fee Related CN202700653U (en) | 2012-07-13 | 2012-07-13 | Discharge electrode of electrostatic precipitator |
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| Country | Link |
|---|---|
| CN (1) | CN202700653U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107321502A (en) * | 2017-08-09 | 2017-11-07 | 爱优特空气技术（上海）有限公司 | A kind of sawtooth ionization device |
| RU2680550C1 (en) * | 2018-04-23 | 2019-02-22 | Общество с ограниченной ответственностью "Индастриал Восток Инжиниринг" | Electric filter corona-forming electrode |
| CN112657679A (en) * | 2020-12-14 | 2021-04-16 | 上海士诺净化科技有限公司 | Electrostatic dust collection module group |
| CN115069078A (en) * | 2022-04-27 | 2022-09-20 | 浙江大维高新技术股份有限公司 | Sewage pump station purification equipment and method |
-
2012
- 2012-07-13 CN CN 201220341293 patent/CN202700653U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107321502A (en) * | 2017-08-09 | 2017-11-07 | 爱优特空气技术（上海）有限公司 | A kind of sawtooth ionization device |
| CN107321502B (en) * | 2017-08-09 | 2024-05-28 | 爱优特空气技术（上海）有限公司 | Sawtooth ionization equipment |
| RU2680550C1 (en) * | 2018-04-23 | 2019-02-22 | Общество с ограниченной ответственностью "Индастриал Восток Инжиниринг" | Electric filter corona-forming electrode |
| CN112657679A (en) * | 2020-12-14 | 2021-04-16 | 上海士诺净化科技有限公司 | Electrostatic dust collection module group |
| CN112657679B (en) * | 2020-12-14 | 2022-09-23 | 上海士诺净化科技有限公司 | Electrostatic dust collection module group |
| CN115069078A (en) * | 2022-04-27 | 2022-09-20 | 浙江大维高新技术股份有限公司 | Sewage pump station purification equipment and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20180713 |