CN102909132B - Direct current high voltage high frequency pulse dual-pole corona grating static coagulation dust removal device - Google Patents
Direct current high voltage high frequency pulse dual-pole corona grating static coagulation dust removal device Download PDFInfo
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Abstract
The invention relates to a direct current high voltage high frequency pulse dual-pole corona grating static coagulation dust removal device. The technical scheme is that an outlet end of a static coagulation device (2) is fixedly connected with the inlet end of a static dust removal device (9), 2-20 high voltage pole grating frames are arranged in a shell of the static coagulation device (2), the number of grounding pole grating frames in the shell is one more than the number of the high voltage pole grating frames, the high voltage pole grating frames and the grounding pole grating frames are suspended at the inner wall of a top plate of the shell of the static coagulation device (2) by metal suspension rods (6) and insulators (7) and are equidistantly and alternatively installed in parallel, high voltage pole wires (4) in the high voltage pole grating frames and the grounding pole wires (14) in the grounding pole grating frames are equidistantly and alternatively arranged in a staggering mode, and a high voltage end of a direct current high voltage high frequency pulse power supply (3) is connected with the high voltage pole grating frames and a low voltage end of the direct current high voltage high frequency pulse power supply (3) is connected with the grounding pole grating frames. The direct current high voltage high frequency pulse dual-pole corona grating static coagulation dust removal device is simple in structure and good in system safety, and the static coagulation effect and dust removal efficiency on fine particles can be further improved.
Description
Technical field
The invention belongs to a kind of electrostatic coalescence device, especially relate to a kind of high direct voltage high-frequency impulse bipolar corona grid electrostatic coalescence dust arrester.
Background technology
The dedusting of electrostatic coalescence is a kind of purification method first by electrostatic force charged fine grit being aggregated into dedusting again after larger particles.One of the dedusting of electrostatic coalescence is considered to control PM2.5 at present, and even the most effective method of PM1 (Yang Linjun. Combustion Source fine particle pollution control technology, Chemical Industry Press, Beijing: 2011).Electrostatic coagulating technique mainly divides three kinds: the electrostatic coalescence in sustained field; Electrostatic coalescence in low-frequency alternating electric field; Electrostatic coalescence in high-frequency alternating field.
1, the electrostatic coalescence in sustained field
For making dust generation electrostatic coalescence, dust band heterocharge (hereinafter referred to as bipolar charge) first must be made.Bipolar charge dust in sustained field electrostatic coalescence research start from the end of the eighties in last century (Eliasson B etc. bipolar charge particulate coalescence in flue coalescer. aerosol science magazine, 1987,18 (8): 869-872), the electrostatic coalescence of bipolar charge dust in sustained field has obvious shortcoming: (1) because of per share charged particle stream be unipolar, be mutual exclusion between particle, be unfavorable for coalescence; (2) for making positively charged particle flux and electronegative particle flux mix more fully, coalescence district head.
2, the electrostatic coalescence in low-frequency alternating electric field
For increasing the probability that bipolar charge dust collides mutually, introducing alternating electric field power is a kind of effective ways.The research of low-frequency alternating E field electrostatic coalescence starts from the mid-90 in last century, the people such as Kildes (Kildes J etc. the experimental study of particulate coalescence in alternating electric field. aerosol science and technology. 1995,23 (7): 603-610) and the people such as Watanabe (Watanabe T etc. the coalescence of electrostatic coalescer sub-micron particle. electrostatics magazine, 1995,34 (4): 367-383) low-frequency ac high pressure is applied in coalescence district, charged particle produces vibration under the effect of alternating electric field power, facilitates the coalescence between bipolar charge particulate.Bipolar electrostatic coalescence to be realized in low-frequency alternating electric field, at least need 3 high voltage sourcies: make dust charge heterocharge need 1 positive high voltage dc source and 1 negative high voltage dc source, make dust coalescence need 1 ac high voltage source.The high voltage source quantity used is many, means that cost is high.
3, the electrostatic coalescence in high-frequency alternating field
Obviously, the key factor affecting bipolar charge dust electrostatic coalescence speed is the frequency of alternating electric field.Much research confirms, when frequency is higher than 50Hz, the effect of electrostatic coalescence decays very soon (Y. Koizumi M etc. the coagulation coefficient of bipolar charge particulate is estimated. electrostatics magazine, 2000,48 (1): 93-101; Towards dawn is eastern, old precious intelligence Colbeck I. two-region coalescer coalescence and collection bipolar charge aerosol. environmental science magazine, 2001,13 (3): 276-279; Liu Dong etc. the experimental study that alternating electric field frequency affects charged fine dust coalescence. scientific and technological Leader, 2009,27 (5): 61-64).Reason is, although powder dust particle is very little, always there is effect of inertia, and the alternating electric field power that too high frequency produces can make the amplitude of particle reduce, even as you were.So the frequency of the electrostatic coalescence in low-frequency alternating electric field is generally at about 10Hz.
But when frequency is increased to more than thousands of volt, coalescence effect can strengthen suddenly.The alternating current voltage frequency that the Cosa/Tron electrostatic coalescence apparatus that U.S. CRS produces uses is but more than 100,000 Hz(Cao Yang, Lang Siwei. introduce a kind of novel air self-cleaning system. and architecture science, 1998,14 (1): 58-61).The Cosa/Tron electrostatic coalescer of practical application in industry to be added in electric grid collection group forming frequency up to the compound field of 150,000 Hz by the high voltage direct current of 25kV and the high-frequency alternating current of 0.65kV.
This " hyperfrequency " static condensation mechanism be difficult to the cohesion of alternating electric field power explain (towards dawn east write. aerosol science technical foundation. Beijing: China Environmental Science Press, 2012).Think qualitatively: bipolar charge dust (positively charged dust and electronegative dust) does relative motion under the effect of DC high voltage electric field power, simultaneously, high-frequency alternating field active force enhances random motion and the generating collision effect of bipolar charge dust, accelerates interparticle coalescence.
The high-frequency electrostatic coalescence of Cosa/Tron electrostatic coalescer is a technological progress with milestone significance: Cosa/Tron electrostatic coalescer only realizes the bipolar charge of grit with 1 DC high-voltage power supply, reduce system cost; The voltage of the AC power of Cosa/Tron electrostatic coalescer only has 0.65kV, improves the security of system.
But the shortcoming of Cosa/Tron electrostatic coalescer is that electrode structure is more complicated; The ac pulse voltage that Cosa/Tron electrostatic coalescer provides is very low, limits the further raising of the vibration coalescence effect of bipolar charge dust.
In sum, the electrostatic coagulating technique Problems existing in traditional alternating electric field is:
(1) need multiple stage AC and DC power supply could realize the charged of grit and bipolar electrostatic coalescence, therefore equipment initial outlay is large, operating cost is high;
(2) the electrostatic coalescence dust pelletizing system in traditional alternating electric field is complicated, need arrange pre electrified district, or take AC and DC combination electrode, and volume is large, complex structure;
(3) no matter be low-frequency ac high voltage source or high-frequency ac high voltage source, subject matter is in the application reliability and poor stability.The insulating requirements of ac high voltage source to equipment is high, is easily out of order.Ac high voltage source is compared with DC high-voltage power supply has higher danger.
Summary of the invention
The present invention is intended to overcome prior art defect, and task is to provide that a kind of structure is simple, security of system good, can improves further to dust, especially to the electrostatic coalescence of fine dust (hereinafter referred to as micronic dust) and the high direct voltage high-frequency impulse bipolar corona grid electrostatic coalescence dust arrester of efficiency of dust collection.
For realizing above-mentioned task, the technical solution adopted in the present invention is: this device is by inlet box, electrostatic coalescer, electrostatic precipitator and go out gas tank and form, the entrance point of inlet box and electrostatic coalescer is fixedly connected, the port of export of electrostatic coalescer and the entrance point of electrostatic precipitator are fixedly connected, the port of export of electrostatic precipitator with go out gas tank and be fixedly connected.
The structure of electrostatic coalescer is: in electrostatic coalescer housing, be provided with high-pressure stage framework and earthing pole framework, and high-pressure stage framework is 2 ~ 20, many 1 of the quantity of the high-pressure stage framework be provided with in the number ratio electrostatic coalescer housing of earthing pole framework.High-pressure stage framework and earthing pole framework are parallel to each other, and high-pressure stage framework and earthing pole framework are alternately installed in equidistant.
High pressure polar curve and high-pressure stage template is provided with in each high-pressure stage framework, high pressure polar curve and high-pressure stage template are arranged alternately mutually, high pressure polar curve and high-pressure stage template add up to 7 or 9 or 11 or 13, many 1 of high pressure polar curve number ratio high-pressure stage template quantity in each high-pressure stage framework, the upper end of high pressure polar curve and high-pressure stage template connects with the upper side frame of high-pressure stage framework, the lower end of high pressure polar curve and high-pressure stage template connects with the lower frame of high-pressure stage framework, forms high-pressure stage palisade framework.
Earthing pole template and ground connection polar curve is provided with in each earthing pole framework, earthing pole template and ground connection polar curve are arranged alternately mutually, earthing pole template and ground connection polar curve add up to 7 or 9 or 11 or 13, many 1 of earthing pole template number ratio ground connection polar curve quantity in each earthing pole framework, the upper end of earthing pole template and ground connection polar curve connects with the upper side frame of earthing pole framework, the lower end of earthing pole template and ground connection polar curve connects with the lower frame of earthing pole framework, forms earthing pole palisade framework.
Every root high pressure polar curve in high-pressure stage palisade framework faces corresponding earthing pole template in earthing pole palisade framework successively, every block high-pressure stage template in high-pressure stage palisade framework faces corresponding ground connection polar curve in earthing pole palisade framework successively, and the high pressure polar curve namely in electrostatic coalescer and ground connection polar curve are in being equidistantly alternately arranged layout.The high-pressure side of high direct voltage high frequency pulse power supply is connected with high-pressure stage palisade framework, and the low-pressure end of high direct voltage high frequency pulse power supply is connected with earthing pole palisade framework.
The structure of electrostatic coalescer or: in electrostatic coalescer housing, be provided with high-pressure stage framework and earthing pole framework, high-pressure stage framework is 2 ~ 20, many 1 of the quantity of the high-pressure stage framework be provided with in the number ratio electrostatic coalescer housing of earthing pole framework.High-pressure stage framework and earthing pole framework are parallel to each other, and high-pressure stage framework and earthing pole framework are alternately installed in equidistant.
Be provided with 7-13 root high pressure polar curve in each high-pressure stage framework equably, the top and bottom of every root high pressure polar curve, respectively with the upper side frame of high-pressure stage framework with lower frame is corresponding connects, form high-pressure stage palisade framework.Ground connection polar curve is provided with equably in each earthing pole framework, many 1 of high pressure polar curve quantity in the high-pressure stage framework that ground connection polar curve number ratio in earthing pole framework is corresponding, the top and bottom of every root ground connection polar curve, respectively with the upper side frame of high-pressure stage framework with lower frame is corresponding connects, form earthing pole palisade framework.
Every root high pressure polar curve in high-pressure stage palisade framework faces the gap of corresponding ground connection polar curve in earthing pole palisade framework successively, every root ground connection polar curve in earthing pole palisade framework faces the gap of corresponding high pressure polar curve in high-pressure stage palisade framework successively, and the high pressure polar curve in the high-pressure stage palisade framework namely in electrostatic coalescer and the ground connection polar curve in earthing pole palisade framework are in being equidistantly alternately arranged layout; The high-pressure side of high direct voltage high frequency pulse power supply is connected with high-pressure stage palisade framework, and the low-pressure end of high direct voltage high frequency pulse power supply is connected with earthing pole palisade framework.
The mode that the described port of export of electrostatic coalescer and the entrance point of electrostatic precipitator are fixedly connected has two kinds: one directly adopts flange to be fixedly connected; Another kind is that the port of export of electrostatic coalescer and the entrance point of electrostatic precipitator are fixedly connected by pipeline.
Described high-pressure stage framework is identical with the shape of described earthing pole framework, be rectangular frame structure, the height of rectangular frame is identical, be 0.80 ~ 0.95 times of the inside wall height of electrostatic coalescer housing, the length of rectangular frame is 0.80 ~ 0.90 times of the inwall length of electrostatic coalescer housing, and the width of rectangular frame is 20 ~ 40mm; High-pressure stage framework and earthing pole framework hang the top board in electrostatic coalescer inner walls respectively by metal suspension rod and insulator.
Described high pressure polar curve and ground connection polar curve are the one in round wire, RS type prickle wire, astroid, jaggies and angle steel prickle wire.
Described high-pressure stage template and earthing pole template are C template or are Z-shaped plate.
Owing to adopting technique scheme, present invention employs high direct voltage high-frequency impulse power supply mode, high-pressure stage palisade framework and earthing pole palisade framework are staggeredly arranged.After dust-contained airflow enters the electric field between high pressure polar curve and ground connection polar curve, near the dust of high pressure polar curve by lotus with negative electricity, near the dust of ground connection polar curve by lotus with positive electricity, under the effect of DC high voltage electric field power, the dust of bear electricity and lotus positive electricity does relative motion, in the middle part of electric field between high-pressure stage palisade framework and earthing pole palisade framework, there is relative enrichment in Charged.Under the effect of high-frequency impulse electric field force, Charged fast vibration collision coalescence, the electrostatic precipitator after the dust group after coalescence is connected in coalescence device trapped.
Dust-contained airflow enters in electrostatic coalescer by inlet box, and dust enters the electric field between high pressure polar curve and earthing pole template under the conveying of air-flow, or enters the electric field between high-pressure stage template and ground connection polar curve.When high direct voltage high frequency pulse power supply is powered, if first dust enters the electric field between high pressure polar curve and earthing pole template, high pressure polar curve produce negative corona discharge, anion releasing, dust by lotus with negative electricity.Moved to earthing pole template with mode of vibration with the dust of negative electricity by lotus under electric field force effect, be deposited in the surface of earthing pole template, finally fall into the ash bucket of electrostatic coalescer bottom.
Collection at large bear electricity dust brought into by the electric field between high-pressure stage template and ground connection polar curve by air-flow, ground connection polar curve produce anti-electric-corona discharge, release cation, dust by lotus with positive electricity.Moved to high-pressure stage template with mode of vibration with the dust of positive electricity by lotus under electric field force effect, be deposited in the surface of high-pressure stage template, finally fall into the ash bucket of electrostatic coalescer bottom.If the lotus positive electricity dust of collection at large collides with the bear electricity dust just entering this electric field, dust group (bulky grain) can be become by coalescence.The coalescence dust group of collection at large is captured with being moved in the electrostatic precipitator after being connected in coalescence device of air-flow, and the air-flow after purification is discharged from going out gas tank.
The present invention compared with prior art, has following good effect:
(1) existing electrostatic coalescer adopts ac high voltage source, and ac high voltage source has higher risk; And the present invention adopts high direct voltage high frequency pulse power supply, security is high.
(2) existing electrostatic coalescer will realize the charged of grit and bipolar electrostatic coalescence, need 2 high voltage sourcies (as Cosa/Tron electrostatic coalescer needs 1 DC high-voltage power supply and 1 ac high voltage source), or need 3 high voltage sourcies (as Watanabe electrostatic coalescer needs 2 direct currents and 1 ac high voltage source); And the present invention only can realize the charged of dust and bipolar electrostatic coalescence with a high direct voltage high frequency pulse power supply simultaneously, considerably reduce the initial input cost of equipment.
(3) existing electrostatic coalescer complex structure, as Cosa/Tron electrostatic coalescer needs 3 electrodes, need to add alternating voltage auxiliary electrode, as Watanabe electrostatic coalescer needs high direct voltage pre electrified district and ac high-voltage coalescence district between corona grid high-pressure stage and corona grid earthing pole; And the present invention only needs high-pressure stage and earthing pole, the high-pressure stage of electrostatic coalescer is identical with the electrode form of earthing pole, realize the charged of dust and coalescence, therefore structure is simple with a high direct voltage high frequency pulse power supply in an electric field simultaneously.
(4) existing electrostatic coalescer (Cosa/Tron electrostatic coalescer) pulse voltage amplitude little (650V); And the pulse voltage amplitude that high direct voltage high frequency pulse power supply of the present invention exports can reach 1 ~ 50,000 volt, enhance the generating collision coalescence effect of bipolar charge dust significantly, thus the electrostatic coalescence effect further increased micronic dust and efficiency of dust collection.
(5) practical.The corona wire that the present invention adopts existing electrostatic precipitator conventional and template, processing and fabricating is very easy.
Therefore, not only structure is simple and security of system is good in the present invention, and the electrostatic coalescence effect that can improve further micronic dust and efficiency of dust collection.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present invention;
Fig. 2 is the plan structure schematic diagram of Fig. 1;
Fig. 3 is another kind of structural representation of the present invention;
Fig. 4 is the plan structure schematic diagram of Fig. 3.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention will be further described, not limiting the scope of the invention.
embodiment 1
A kind of high direct voltage high-frequency impulse bipolar corona grid electrostatic coalescence dust arrester.As shown in Figure 1, this device is by inlet box 1, electrostatic coalescer 2, electrostatic precipitator 9 with go out gas tank 10 and form.Inlet box 1 is fixedly connected with the entrance point of electrostatic coalescer 2, and the port of export of electrostatic coalescer 2 and the entrance point of electrostatic precipitator 9 directly adopt flange 8 to be fixedly connected, the port of export of electrostatic precipitator 9 with go out gas tank 10 and be fixedly connected.
The structure of electrostatic coalescer 2 is as shown in Figure 2: in electrostatic coalescer 2 housing, be provided with high-pressure stage framework 11 and earthing pole framework 15, high-pressure stage framework 11 is 2, and earthing pole framework 15 is 3.High-pressure stage framework 11 and earthing pole framework 15 are parallel to each other, and high-pressure stage framework 11 and earthing pole framework 15 are alternately installed in equidistant.High-pressure stage framework 11 and earthing pole framework 15 hang the top board in electrostatic coalescer 2 inner walls respectively by metal suspension rod 6 and insulator 7.
High pressure polar curve 4 and high-pressure stage template 5 is provided with in each high-pressure stage framework 11, high pressure polar curve 4 and high-pressure stage template 5 are arranged alternately mutually, high pressure polar curve 4 and high-pressure stage template 5 add up to 7, high pressure polar curve 4 in each high-pressure stage framework 11 is 4, high-pressure stage template 5 is 3 pieces, the upper end of high pressure polar curve 4 and high-pressure stage template 5 connects with the upper side frame of high-pressure stage framework 11, and the lower end of high pressure polar curve 4 and high-pressure stage template 5 connects with the lower frame of high-pressure stage framework 11, forms high-pressure stage palisade framework.
Earthing pole template 13 and ground connection polar curve 14 is provided with in each earthing pole framework 15, earthing pole template 13 and ground connection polar curve 14 are arranged alternately mutually, earthing pole template 13 and ground connection polar curve 14 add up to 7, earthing pole template 13 in each earthing pole framework 15 is 4 pieces, ground connection polar curve 14 is 3, the upper end of earthing pole template 13 and ground connection polar curve 14 connects with the upper side frame of earthing pole framework 15, the lower end of earthing pole template 13 and ground connection polar curve 14 connects with the lower frame of earthing pole framework 15, forms earthing pole palisade framework.
Every root high pressure polar curve 4 in high-pressure stage palisade framework faces corresponding earthing pole template 13 in earthing pole palisade framework successively, every block high-pressure stage template 5 in high-pressure stage palisade framework faces corresponding ground connection polar curve 14 in earthing pole palisade framework successively, and the high pressure polar curve 4 namely in electrostatic coalescer 2 and ground connection polar curve 14 are in being equidistantly alternately arranged layout.The high-pressure side of high direct voltage high frequency pulse power supply 3 is connected with high-pressure stage palisade framework, and the low-pressure end of high direct voltage high frequency pulse power supply 3 is connected with earthing pole palisade framework.
In the present embodiment:
Described high-pressure stage framework 11 is identical with the shape of described earthing pole framework 15, be rectangular frame structure, the height of rectangular frame is identical, be 0.80 ~ 0.90 times of the inside wall height of electrostatic coalescer 2 housing, the length of rectangular frame is 0.80 ~ 0.85 times of the inwall length of electrostatic coalescer 2 housing, and the width of rectangular frame is 20 ~ 30mm;
Described high pressure polar curve 4 and ground connection polar curve 14 are RS type prickle wire.
Described high-pressure stage template 5 and earthing pole template 13 are C template.
embodiment 2
A kind of high direct voltage high-frequency impulse bipolar corona grid electrostatic coalescence dust arrester.This device is except following structure and technical parameter, and all the other are with embodiment 1.
The port of export of electrostatic coalescer 2 and the entrance point of electrostatic precipitator 9 are fixedly connected by pipeline;
High-pressure stage framework 11 is 3 ~ 10, many 1 of the quantity of the high-pressure stage framework be provided with in number ratio electrostatic coalescer 2 housing of earthing pole framework;
High pressure polar curve 4 and high-pressure stage template 5 add up to 9 or 11 or 13, many 1 of high pressure polar curve 4 number ratio high-pressure stage template 5 quantity in each high-pressure stage framework 11;
Earthing pole template 13 and ground connection polar curve 14 add up to 9 or 11 or 13;
High pressure polar curve 4 and ground connection polar curve 14 are the one in astroid, jaggies and angle steel prickle wire.
embodiment 3
A kind of high direct voltage high-frequency impulse bipolar corona grid electrostatic coalescence dust arrester.As shown in Figure 3, this device is by inlet box 1, electrostatic coalescer 2, electrostatic precipitator 9 with go out gas tank 10 and form.Inlet box 1 is fixedly connected with the entrance point of electrostatic coalescer 2, and the port of export of electrostatic coalescer 2 and the entrance point of electrostatic precipitator 9 directly adopt flange 8 to be fixedly connected, the port of export of electrostatic precipitator 9 with go out gas tank 10 and be fixedly connected.
The structure of electrostatic coalescer 2 is: in electrostatic coalescer 2 housing, be provided with high-pressure stage framework and earthing pole framework, and high-pressure stage framework is 11 ~ 15, many 1 of the quantity of the high-pressure stage framework be provided with in number ratio electrostatic coalescer 2 housing of earthing pole framework.High-pressure stage framework 11 and earthing pole framework 15 are parallel to each other, and high-pressure stage framework 11 and earthing pole framework 15 are alternately installed in equidistant.High-pressure stage framework 11 and earthing pole framework 15 hang the top board in electrostatic coalescer 2 inner walls respectively by metal suspension rod 6 and insulator 7.
Be provided with 7 high pressure polar curves 4 in each high-pressure stage framework 11 equably, the top and bottom of every root high pressure polar curve 4, respectively with the upper side frame of high-pressure stage framework 11 with lower frame is corresponding connects, form high-pressure stage palisade framework.Be provided with 8 ground connection polar curves 14 in each earthing pole framework 15 equably, the top and bottom of every root ground connection polar curve 14, respectively with the upper side frame of high-pressure stage framework 11 with lower frame is corresponding connects, form earthing pole palisade framework.
Every root high pressure polar curve 4 in high-pressure stage palisade framework faces the gap of corresponding ground connection polar curve 14 in earthing pole palisade framework successively, every root ground connection polar curve 14 in earthing pole palisade framework faces the gap of corresponding high pressure polar curve 4 in high-pressure stage palisade framework successively, and the high pressure polar curve 4 in the high-pressure stage palisade framework namely in electrostatic coalescer 2 and the ground connection polar curve in earthing pole palisade framework 14 are in being equidistantly alternately arranged layout; The high-pressure side of high direct voltage high frequency pulse power supply 3 is connected with high-pressure stage palisade framework, and the low-pressure end of high direct voltage high frequency pulse power supply 3 is connected with earthing pole palisade framework.
In the present embodiment, high-pressure stage framework 11 is identical with the shape of described earthing pole framework 15, be rectangular frame structure, the height of rectangular frame is identical, be 0.90 ~ 0.95 times of the inside wall height of electrostatic coalescer 2 housing, the length of rectangular frame is 0.85 ~ 0.90 times of the inwall length of electrostatic coalescer 2 housing, and the width of rectangular frame is 30 ~ 40mm.
High pressure polar curve 4 and the ground connection polar curve 14 of the present embodiment are round wire; High-pressure stage template 5 and earthing pole template 13 are Z-shaped plate.
embodiment 4
A kind of high direct voltage high-frequency impulse bipolar corona grid electrostatic coalescence dust arrester.This device is except following structure and technical parameter, and all the other are with embodiment 3.
The port of export of electrostatic coalescer 2 and the entrance point of electrostatic precipitator 9 are fixedly connected by pipeline;
High-pressure stage framework 11 is 16 ~ 20, many 1 of the quantity of the high-pressure stage framework be provided with in number ratio electrostatic coalescer 2 housing of earthing pole framework;
8 ~ 13 high pressure polar curves 4 are provided with equably, many 1 of the quantity of the high pressure polar curve 4 in the high-pressure stage framework 11 that the number ratio of the ground connection polar curve 14 in earthing pole framework 15 is corresponding in each high-pressure stage framework 11;
High pressure polar curve 4 and ground connection polar curve 14 are the one in astroid, jaggies and angle steel prickle wire.
This detailed description of the invention have employed high direct voltage high-frequency impulse power supply mode, high-pressure stage palisade framework and earthing pole palisade framework is staggeredly arranged.After dust-contained airflow enters the electric field between high pressure polar curve 4 and ground connection polar curve 14, near the dust of high pressure polar curve 4 by lotus with negative electricity, near the dust of ground connection polar curve 14 by lotus with positive electricity, under the effect of DC high voltage electric field power, the dust of bear electricity and lotus positive electricity does relative motion, in the middle part of electric field between high-pressure stage palisade framework and earthing pole palisade framework, there is relative enrichment in Charged.Under the effect of high-frequency impulse electric field force, Charged fast vibration collision coalescence, the electrostatic precipitator 9 after the dust group after coalescence is connected in coalescence device trapped.
Dust-contained airflow enters in electrostatic coalescer 2 by inlet box 1, and dust enters the electric field between high pressure polar curve 4 and ground connection pole plate 13 under the conveying of air-flow, or enters the electric field between high-pressure polar plate 5 and ground connection polar curve 14.When high direct voltage high frequency pulse power supply 3 is powered, if first dust enters the electric field between high pressure polar curve 4 and ground connection pole plate 13, high pressure polar curve 4 produces negative corona discharge, anion releasing, dust by lotus with negative electricity.Moved to ground connection pole plate 13 with mode of vibration with the dust of negative electricity by lotus under electric field force effect, be deposited in the surface of ground connection pole plate 13, finally fall into the ash bucket 12 of electrostatic coalescer 2 bottom.
Collection at large bear electricity dust brought into by the electric field between high-pressure polar plate 5 and ground connection polar curve 14 by air-flow, ground connection polar curve 14 produces anti-electric-corona discharge, release cation, dust by lotus with positive electricity.Moved to high-pressure polar plate 5 with mode of vibration with the dust of positive electricity by lotus under electric field force effect, be deposited in the surface of high-pressure polar plate 5, finally fall into the ash bucket 12 of electrostatic coalescer 2 bottom.If the lotus positive electricity dust of collection at large collides with the bear electricity dust just entering this electric field, dust group (bulky grain) can be become by coalescence.The coalescence dust group of collection at large is captured with being moved in the electrostatic precipitator 9 after being connected in coalescence device of air-flow, and the air-flow after purification is discharged from going out gas tank 10.
This detailed description of the invention compared with prior art, has following good effect:
(1) existing electrostatic coalescer adopts ac high voltage source to power, and ac high voltage source has higher risk; And this detailed description of the invention adopts high direct voltage high frequency pulse power supply 3 to power, security is high.
(2) existing electrostatic coalescer will realize the charged of grit and bipolar electrostatic coalescence, need 2 high voltage sourcies (as Cosa/Tron electrostatic coalescer needs 1 DC high-voltage power supply and 1 ac high voltage source), or need 3 high voltage sourcies (as Watanabe electrostatic coalescer needs 2 direct currents and 1 ac high voltage source); And this detailed description of the invention only can realize the charged of dust and bipolar electrostatic coalescence with a high direct voltage high frequency pulse power supply 3 simultaneously, considerably reduce the initial input cost of equipment.
(3) existing electrostatic coalescer complex structure, as Cosa/Tron electrostatic coalescer needs 3 electrodes, need to add alternating voltage auxiliary electrode, as Watanabe electrostatic coalescer needs high direct voltage pre electrified district and ac high-voltage coalescence district between corona grid high-pressure stage and corona grid earthing pole; And this detailed description of the invention only needs high-pressure stage and earthing pole, namely only need high-pressure stage palisade framework and earthing pole palisade framework, the charged of dust and coalescence can be realized with a high direct voltage high frequency pulse power supply 3 in an electric field, therefore structure is simple simultaneously.
(4) existing electrostatic coalescer (Cosa/Tron electrostatic coalescer) pulse voltage amplitude little (650V); And the pulse voltage amplitude that the high direct voltage high frequency pulse power supply 3 that this detailed description of the invention adopts exports can reach 1 ~ 50,000 volt, enhance the generating collision coalescence effect of bipolar charge dust significantly, thus the electrostatic coalescence effect further increased micronic dust and efficiency of dust collection.
(5) practical.The corona wire that this detailed description of the invention adopts existing electrostatic precipitator conventional and template, processing and fabricating is very easy.
Therefore, not only structure is simple and security of system is good for this detailed description of the invention, and the electrostatic coalescence effect that can improve further micronic dust and efficiency of dust collection.
Claims (5)
1. a high direct voltage high-frequency impulse bipolar corona grid electrostatic coalescence dust arrester, it is characterized in that this device is by inlet box (1), electrostatic coalescer (2), electrostatic precipitator (9) with go out gas tank (10) and form, inlet box (1) is fixedly connected with the entrance point of electrostatic coalescer (2), the port of export of electrostatic coalescer (2) and the entrance point of electrostatic precipitator (9) are fixedly connected, the port of export of electrostatic precipitator (9) with go out gas tank (10) and be fixedly connected;
The structure of electrostatic coalescer (2) is: in electrostatic coalescer (2) housing, be provided with high-pressure stage framework (11) and earthing pole framework (15), high-pressure stage framework (11) is 2 ~ 20, many 1 of the quantity of the high-pressure stage framework (11) be provided with in number ratio electrostatic coalescer (2) housing of earthing pole framework (15); High-pressure stage framework (11) and earthing pole framework (15) are parallel to each other, and high-pressure stage framework (11) and earthing pole framework (15) are alternately installed in equidistant;
High pressure polar curve (4) and high-pressure stage template (5) is provided with in each high-pressure stage framework (11), high pressure polar curve (4) and high-pressure stage template (5) are arranged alternately mutually, high pressure polar curve (4) and high-pressure stage template (5) add up to 7, or 9, or 11, or 13, many 1 of the quantity of the number ratio high-pressure stage template (5) of the high pressure polar curve (4) in each high-pressure stage framework (11), the upper end of high pressure polar curve (4) and high-pressure stage template (5) connects with the upper side frame of high-pressure stage framework (11), the lower end of high pressure polar curve (4) and high-pressure stage template (5) connects with the lower frame of high-pressure stage framework (11), form high-pressure stage palisade framework,
Earthing pole template (13) and ground connection polar curve (14) is provided with in each earthing pole framework (15), earthing pole template (13) and ground connection polar curve (14) are arranged alternately mutually, earthing pole template (13) and ground connection polar curve (14) add up to 7, or 9, or 11, or 13, many 1 of the quantity of the number ratio ground connection polar curve (14) of the earthing pole template (13) in each earthing pole framework (15), the upper end of earthing pole template (13) and ground connection polar curve (14) connects with the upper side frame of earthing pole framework (15), the lower end of earthing pole template (13) and ground connection polar curve (14) connects with the lower frame of earthing pole framework (15), form earthing pole palisade framework,
Every root high pressure polar curve (4) in high-pressure stage palisade framework faces corresponding earthing pole template (13) in earthing pole palisade framework successively, every block high-pressure stage template (5) in high-pressure stage palisade framework faces corresponding ground connection polar curve (14) in earthing pole palisade framework successively, and the high pressure polar curve (4) namely in electrostatic coalescer (2) and ground connection polar curve (14) are in being equidistantly alternately arranged layout; The high-pressure side of high direct voltage high frequency pulse power supply (3) is connected with high-pressure stage palisade framework, and the low-pressure end of high direct voltage high frequency pulse power supply (3) is connected with earthing pole palisade framework;
The structure of electrostatic coalescer (2) or: in electrostatic coalescer (2) housing, be provided with high-pressure stage framework (11) and earthing pole framework (15), high-pressure stage framework (11) is 2 ~ 20, many 1 of the quantity of the high-pressure stage framework (11) be provided with in number ratio electrostatic coalescer (2) housing of earthing pole framework (15); High-pressure stage framework (11) and earthing pole framework (15) are parallel to each other, and high-pressure stage framework (11) and earthing pole framework (15) are alternately installed in equidistant;
Be provided with 7-13 root high pressure polar curve (4) equably in each high-pressure stage framework (11), the top and bottom of every root high pressure polar curve (4) are divided
Not with the upper side frame of high-pressure stage framework (11) with lower frame is corresponding connects, formation high-pressure stage palisade framework; Each earthing pole framework (15)
Inside be provided with ground connection polar curve (14) equably, many 1 of the quantity of the high pressure polar curve (4) in the high-pressure stage framework (11) that the number ratio of the ground connection polar curve (14) in earthing pole framework (15) is corresponding, the top and bottom of every root ground connection polar curve (14), respectively with the upper side frame of high-pressure stage framework (11) with lower frame is corresponding connects, form earthing pole palisade framework;
Every root high pressure polar curve (4) in high-pressure stage palisade framework faces the gap of corresponding ground connection polar curve (14) in earthing pole palisade framework successively, every root ground connection polar curve (14) in earthing pole palisade framework faces the gap of corresponding high pressure polar curve (4) in high-pressure stage palisade framework successively, and the high pressure polar curve (4) in the high-pressure stage palisade framework namely in electrostatic coalescer (2) and the ground connection polar curve (14) in earthing pole palisade framework are in being equidistantly alternately arranged layout; The high-pressure side of high direct voltage high frequency pulse power supply (3) is connected with high-pressure stage palisade framework, and the low-pressure end of high direct voltage high frequency pulse power supply (3) is connected with earthing pole palisade framework.
2. high direct voltage high-frequency impulse according to claim 1 bipolar corona grid electrostatic coalescence dust arrester, is characterized in that the mode that the port of export of described electrostatic coalescer (2) and the entrance point of electrostatic precipitator (9) are fixedly connected is two kinds: one directly adopts flange (8) to be fixedly connected; Another kind is that the port of export of electrostatic coalescer (2) and the entrance point of electrostatic precipitator (9) are fixedly connected by pipeline.
3. high direct voltage high-frequency impulse according to claim 1 bipolar corona grid electrostatic coalescence dust arrester, it is characterized in that described high-pressure stage framework (11) is identical with the shape of described earthing pole framework (15), be rectangular frame structure, the height of rectangular frame is identical, be 0.80 ~ 0.95 times of the inside wall height of electrostatic coalescer (2) housing, the length of rectangular frame is 0.80 ~ 0.90 times of the inwall length of electrostatic coalescer (2) housing, and the width of rectangular frame is 20 ~ 40mm; High-pressure stage framework (11) and earthing pole framework (15) hang the top board in electrostatic coalescer (2) inner walls respectively by metal suspension rod (6) and insulator (7).
4. high direct voltage high-frequency impulse according to claim 1 bipolar corona grid electrostatic coalescence dust arrester, is characterized in that described high pressure polar curve (4) and ground connection polar curve (14) are round wire, one in RS type prickle wire, astroid, jaggies and angle steel prickle wire.
5. high direct voltage high-frequency impulse according to claim 1 bipolar corona grid electrostatic coalescence dust arrester, is characterized in that described high-pressure stage template (5) and earthing pole template (13) are for C template or be Z-shaped plate.
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| CN104069713B (en) * | 2014-07-06 | 2016-02-03 | 盐城工学院 | A kind of electricity-bag dust collecting process strengthening coalescence |
| CN105665142A (en) * | 2016-03-23 | 2016-06-15 | 北京上派环境科技有限公司 | Flat plate type air filter with columnar dielectrophoresis electrodes |
| CN106765566B (en) * | 2016-12-12 | 2022-08-09 | 浙江大学 | Ion wind driven air purifier capable of synchronously treating various pollutants |
| CN106583042B (en) * | 2016-12-30 | 2018-08-28 | 安徽工业大学 | A method of sintering flue gas fine particle is removed based on pulsed discharge |
| CN106540806B (en) * | 2016-12-30 | 2018-07-20 | 安徽工业大学 | A kind of emission-reducing system removing sintering flue gas fine particle based on pulsed discharge |
| CN111054168B (en) * | 2019-12-13 | 2023-05-02 | 华电电力科学研究院有限公司 | Device and method for efficiently removing multichannel fine particles |
| CN111420803B (en) * | 2020-03-09 | 2021-07-02 | 华中科技大学 | Defogging water-collecting device with positive and negative ion charge and alternating current electric field combined clash |
| CN112844846B (en) * | 2021-02-23 | 2022-09-16 | 上海丸西空环保科技有限公司 | Multi-frequency pulse discharge high-temperature flue gas dust collection device and dust collection method |
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| CA1169917A (en) * | 1981-04-09 | 1984-06-26 | Takashi Ando | Electrostatic precipitator equipped with intermittent high voltage supply |
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| US4410849A (en) * | 1981-03-23 | 1983-10-18 | Mitsubishi Jukogyo Kabushiki Kaisha | Electric dust collecting apparatus having controlled intermittent high voltage supply |
| CN2423030Y (en) * | 2000-01-07 | 2001-03-14 | 武汉科技大学 | Electrostatic condensation electric dust separater |
| CN201154327Y (en) * | 2007-12-29 | 2008-11-26 | 武汉科技大学 | Three-zone dipolar loading electrostatic agglomeration dust remover |
| CN202860696U (en) * | 2012-11-02 | 2013-04-10 | 武汉科技大学 | Direct-current high-voltage pulse bipolar static coagulation dust collecting device |
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