CN104923405A - Wet type electrostatic dust and fog removing device - Google Patents
Wet type electrostatic dust and fog removing device Download PDFInfo
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- CN104923405A CN104923405A CN201510394154.8A CN201510394154A CN104923405A CN 104923405 A CN104923405 A CN 104923405A CN 201510394154 A CN201510394154 A CN 201510394154A CN 104923405 A CN104923405 A CN 104923405A
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Abstract
The invention discloses a wet type electrostatic dust and fog removing device which is of a vertically-arranged pipe type structure. A cathode wire is arranged in the center, and a pipe type anode plate is arranged on the periphery. The upper end and the lower end of the pipe type anode plate are fixed to supporting structures. Smoke can flow reversely from bottom to top and can also flow directly from top to bottom to enter an electric dust remover. When reverse flow arrangement is conducted, a flushing nozzle, a cathode upper supporting structure, an eddy fog remover, an anode upper supporting structure, an anode lower supporting structure, an eddy distributor and a cathode lower supporting structure are sequentially arranged from top to bottom from the top; when direct flow arrangement is conducted, the flushing nozzle, the cathode upper supporting structure, the eddy distributor, the anode upper supporting structure, the anode lower supporting structure, the eddy fog remover and the cathode lower supporting structure are sequentially arranged from top to bottom from the top of the device. The wet type electrostatic dust and fog removing device has the advantage that the dust and fog removing efficiency is improved.
Description
Technical field
The present invention relates to dedusting demister, more specifically, it relates to a kind of wet static dedusting demister.
Background technology
Wet electrical dust precipitator is used for large thermal power plant flue gas purification system, as the follow-up cleaner of wet desulphurization absorption tower, can remove dust, SO
3, the multiple pollutant such as heavy metal, be realize the key equipment that thermal power plant cleans discharge.Because most of repowering project installs wet desulphurization device, not only place limited space, and require very high again to the neat stress dedusting after desulfurizer and demisting efficiency, traditional wet electrical dust precipitator cannot meet system requirements simultaneously.
Summary of the invention
The object of the invention is to overcome deficiency of the prior art, provide a kind of rational in infrastructure, dedusting and the good wet static dedusting demister of fog removal performance.
This wet static dedusting demister, adopt the tubular structure of vertical, center is cathode line, is around tubular anode plate, and tubular anode plate upper and lower side is fixing on the support structure; Flue gas can from bottom to top adverse current, also can following current from top to bottom enter in electric cleaner; When counter-flow arrangement, from top, be furnished with flooding nozzle, negative electrode upper support structure, eddy current demister, anode upper support structure, anode lower support structure, eddy current distributor, negative electrode lower support structure from top to bottom successively; When down current arrangement, from top, be furnished with flooding nozzle, negative electrode upper support structure, eddy current distributor, anode upper support structure, anode lower support structure, eddy current demister, negative electrode lower support structure at device from top to bottom successively.
As preferably: described cathode line is corrosion-resistant metal alloys material, be arranged in the center of tubular anode plate, be the solid or hollow circular-tube between diameter 5 ~ 10mm, cathode line be evenly equipped with prickle or acupuncture, prickle material is identical with cathode line, and prickle is welded in cathode line.
As preferably: tubular anode plate inner core is non-metallic material, and tubular anode plate outer felt is around layer of metal coil.
As preferably: eddy current distributor is made up of one group of concentric spiral board, is bolted in cathode line; Eddy current distributor is nonmetal electrically non-conductive material; A pre-arcing region is also provided with before tubular anode plate.
As preferably: eddy current demister is made up of one group of concentric spiral board, and be fixed in cathode line by bolt-center, periphery and tubular anode plate keep certain interval.Eddy current demister is nonmetal electrically non-conductive material; Its spiral board choice direction is contrary with eddy current distributor.
As preferably: when counter-flow arrangement, tubular anode plate perimeter of section is c, and area of section is s, and its equivalent internal diameter is D (D=4s/c); The length of whole wet electrical dust precipitator is L, and eddy current distributor is at wet-esp arrival end, and its lower end is L3 apart from the pre-arcing region distance of negative electrode lower support structure, and its upper end is L1 apart from the distance of anode lower end; It is the time of staying that the selection of 2m/s ~ 4m/s, L meets gas in positive plate is 0.5s ~ 1.5s that the selection of internal diameter D meets gas flow rate range in positive plate; L1 span is 10 ~ 30mm, L3 span is 200 ~ 500mm; Eddy current distributor is made up of central tube, urceolus and blade; Urceolus cross section is circular, and diameter is dw, general dw span 1/2D ~ 4/5D; Blade plane and horizontal plane angle are s, and blade upper end and horizontal plane angle are r; The scope of general s is 30 ° ~ 50 °, and the scope of r is 10 ° ~ 40 °; Blade quantity is 6 ~ 72.
As preferably: when counter-flow arrangement, eddy current demister is at the wet-esp port of export, and its lower end is L2 apart from positive plate upper end distance; The span of L2 is 10 ~ 30mm; Eddy current demister is made up of central tube, urceolus and blade; Outer barrel diameter is dc, general dc span 2/5D ~ 1/2D; Blade 12 plane and horizontal plane angle are s, and blade lower end and horizontal plane angle are r; The scope of general s is-30 ° ~-50 °, and the scope of r is-10 ° ~-40 °; Blade quantity is 6 ~ 72.
As preferably: when down current arrangement, deduster tubular anode plate perimeter of section is c, and area of section is s, and its equivalent internal diameter is D (D=4s/c); The length of whole wet electrical dust precipitator is L, and eddy current distributor is at wet-esp arrival end, and its upper end is L3 apart from the distance of negative electrode upper support structure, and its lower end is L1 apart from the distance of anode upper end; It is the time of staying that the selection of 2m/s ~ 4m/s, L meets gas in positive plate is 0.5s ~ 1.5s that the selection of general internal diameter D meets gas flow rate range in positive plate; General L1 span is 10 ~ 30mm, L3 span is 200 ~ 500mm; Eddy current distributor is made up of central tube, urceolus and blade; Urceolus cross section is circular, and diameter is dw, general dw span 1/2D ~ 4/5D; Blade plane and horizontal plane angle are s, and blade upper end and horizontal plane angle are r; The scope of general s is 30 ° ~ 50 °, and the scope of r is 10 ° ~ 40 °; Blade quantity is 6 ~ 72.
As preferably: when down current arrangement, eddy current demister is at the wet-esp port of export, and its upper end is L2 apart from tubular anode plate lower end distance; The span of general L2 is 10 ~ 30mm; Eddy current demister is made up of central tube, urceolus and blade; Outer barrel diameter is dc, and general dc span is 2/5D ~ 1/2D; Blade plane and horizontal plane angle are s, and blade lower end and horizontal plane angle are r; The scope of general s is-30 ° ~-50 °, and the scope of r is-10 ° ~-40 °; Blade quantity is 6 ~ 72.
The invention has the beneficial effects as follows:
Eddy current distributor in this device is made up of one group of concentric spiral board, is bolted in cathode line.Eddy current distributor is nonmetal electrically non-conductive material, prevents cathode line and positive plate from producing short circuit.Containing dust and containing SO
3, heavy metal spray film the multiple pollutant flue gas such as to drip through eddy current distributor, under spiral board effect, produce a swirling motion around cathode line, so not only can improve the time of staying of gas in this device, by means of centrifugal force, part big dust particle can also be made and contains SO
3, heavy metal drop etc. caught by the liquid film on positive plate in advance, improves the efficiency of dedusting demist.In addition, due to the choked flow effect of eddy current distributor, a pre-arcing region is set before positive plate again, makes dust and contain SO
3, heavy metal spray film the multiple pollutant flue gas such as to drip at wet electrical dust precipitator entrance extended residence time, can be fully charged, thus improve the removal efficiency of pollutant in wet electrical dust precipitator.
Eddy current demister in this device is made up of one group of concentric spiral board, and be fixed in cathode line by bolt-center, periphery and positive plate keep certain interval, to ensure the mobility not hindering liquid film on positive plate.Eddy current demister distributor is nonmetal electrically non-conductive material, prevents cathode line and positive plate from producing short circuit.Its spiral board choice direction and top (following current) the eddy current distributor of bottom (adverse current) contrary, the dust that is not removed in flue gas can be made and containing SO
3, heavy metal spray film drips and collides with eddy current demister spiral board, thus effectively removed, and further increases the efficiency of dedusting demist.
Accompanying drawing explanation
Fig. 1 be flue gas from bottom to top time structural representation of the present invention;
Fig. 2 be flue gas from top to bottom time structural representation of the present invention;
Fig. 3 and Fig. 4 is eddy current dispensing arrangement schematic diagram;
Fig. 5 and Fig. 6 is eddy current demister structural representation;
Description of reference numerals: nozzle 1, eddy current demister 2, positive plate 3, cathode line 4, eddy current distributor 5, negative electrode lower support structure 6, anode lower support structure 7, anode upper support structure 8, negative electrode upper support structure 9, central tube 10, urceolus 11, blade 12.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described further.The explanation of following embodiment just understands the present invention for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
As shown in Figures 1 to 4.This wet static dedusting demister of the present invention, adopt the tubular structure of vertical, center is cathode line 4, is around tubular anode plate 3, and tubular anode plate 3 upper and lower side is fixing on the support structure; Flue gas can from bottom to top adverse current, also can following current from top to bottom enter in electric cleaner; When counter-flow arrangement, from top, be furnished with flooding nozzle 1, negative electrode upper support structure 9, eddy current demister 2, anode upper support structure 8, anode lower support structure 7, eddy current distributor 5, negative electrode lower support structure 6 from top to bottom successively; When down current arrangement, from top, be furnished with flooding nozzle 1, negative electrode upper support structure 9, eddy current distributor 5, anode upper support structure 8, anode lower support structure 7, eddy current demister 2, negative electrode lower support structure 6 at device from top to bottom successively.
The nozzle 1 from top to down ejection alkaline aqueous solution at device top, its pH is greater than 10, and the aqueous solution forms one deck liquid film on the surface at positive plate 3, and constantly flows downward.Form high voltage electric field by cathode line 4 and positive plate 3, make gas ionization therebetween produce electric charge, electric charge is moved by the negative electrode pole plate that faces south.Containing dust and containing SO
3, heavy metal spray film such as to drip at the multiple pollutant flue gas adverse current or following current enters in electric cleaner, dust and containing SO
3, heavy metal spray film to drip etc. polar substances in multiple pollutant charged after, under the effect of electric field force, pole plate motion on the sunny side, after reaching positive plate 3, is pulled away after being caught by its liquid film continuing to flow downward on the surface, thus completes and remove dust and containing SO
3, heavy metal spray film the process of multiple pollutant such as to drip.
The cathode line 4 of this device is corrosion-resistant metal alloys material, be arranged in the center of tubular anode plate 3, it is generally the solid or hollow circular-tube between diameter 5 ~ 10mm, cathode line 4 is evenly equipped with prickle or acupuncture, prickle material is identical with cathode line, and prickle is welded in cathode line.Cathode line is fixed by upper and lower supporting construction, with bolts, for convenience detach.Positive plate 3 inner core is non-metallic material, and its cross section can be circular, positive square, regular pentagon and regular hexagon.Positive plate 3 outer felt around layer of metal coil, to strengthen electric-field intensity.Positive plate 3 is fixed by upper and lower supporting construction, with bolts, for convenience detach.
Eddy current distributor 5 in this device is made up of one group of concentric spiral board, is bolted in cathode line 4.Eddy current distributor 5 is nonmetal electrically non-conductive material, prevents cathode line 4 and positive plate 3 from producing short circuit.Containing dust and containing SO
3, heavy metal spray film the multiple pollutant flue gas such as to drip through eddy current distributor, under spiral board effect, produce a swirling motion around cathode line, so not only can improve the time of staying of gas in this device, by means of centrifugal force, part big dust particle can also be made and contains SO
3, heavy metal drop etc. caught by the liquid film on positive plate in advance, improves the efficiency of dedusting demist.In addition, due to the choked flow effect of eddy current distributor 5, a pre-arcing region is set before positive plate 3 again, makes dust and contain SO
3, heavy metal spray film the multiple pollutant flue gas such as to drip at wet electrical dust precipitator entrance extended residence time, can be fully charged, thus improve the removal efficiency of pollutant in wet electrical dust precipitator.
Eddy current demister 2 in this device is made up of one group of concentric spiral board, and be fixed in cathode line 4 by bolt-center, periphery and positive plate 3 keep certain interval, to ensure the mobility not hindering liquid film on positive plate 3.Eddy current demister 2 is nonmetal electrically non-conductive material, prevents cathode line 4 and positive plate 3 from producing short circuit.Its spiral board choice direction and top (following current) the eddy current distributor 5 of bottom (adverse current) contrary, the dust that is not removed in flue gas can be made and containing SO
3, heavy metal spray film drips and collides with eddy current demister spiral board, thus effectively removed, and further increases the efficiency of dedusting demist.
When flue gas flow direction is adverse current:
As Fig. 1, tubular anode plate 3 perimeter of section is c, and area of section is s, and its equivalent internal diameter is D (D=4s/c); The length of whole wet electrical dust precipitator is L, and eddy current distributor 5 is at wet-esp arrival end, and its lower end is L3 apart from the pre-arcing region distance of negative electrode lower support structure, and its upper end is L1 apart from the distance of anode lower end; It is the time of staying that the selection of 2m/s ~ 4m/s, L meets gas in positive plate is 0.5s ~ 1.5s that the selection of internal diameter D meets gas flow rate range in positive plate; L1 span is 10 ~ 30mm, L3 span is 200 ~ 500mm; As Fig. 3, eddy current distributor 5 is made up of central tube 10, urceolus 11 and blade 12; Urceolus 11 cross section is circular, and diameter is dw, general dw span 1/2D ~ 4/5D; Blade 12 plane and horizontal plane angle are s, and blade 12 upper end and horizontal plane angle are r; The scope of general s is 30 ° ~ 50 °, and the scope of r is 10 ° ~ 40 °; Blade 12 quantity is 6 ~ 72.
As Fig. 1, eddy current demister 2 is at the wet-esp port of export, and its lower end is L2 apart from positive plate upper end distance; The span of L2 is 10 ~ 30mm; Eddy current demister 2 is made up of central tube 10, urceolus 11 and blade 12; Urceolus 11 diameter is dc, general dc span 2/5D ~ 1/2D; As Fig. 6, blade 12 plane and horizontal plane angle are s, and blade 12 lower end and horizontal plane angle are r; The scope of general s is-30 ° ~-50 °, and the scope of r is-10 ° ~-40 °; Blade 12 quantity is 6 ~ 72.
When flue gas flow direction is following current:
As Fig. 2, deduster tubular anode plate 3 perimeter of section is c, and area of section is s, and its equivalent internal diameter is D (D=4s/c); The length of whole wet electrical dust precipitator is L, and eddy current distributor 5 is at wet-esp arrival end, and its upper end is L3 apart from the distance of negative electrode upper support structure, and its lower end is L1 apart from the distance of anode upper end; It is the time of staying that the selection of 2m/s ~ 4m/s, L meets gas in positive plate is 0.5s ~ 1.5s that the selection of general internal diameter D meets gas flow rate range in positive plate; General L1 span is 10 ~ 30mm, L3 span is 200 ~ 500mm; As Fig. 5, eddy current distributor 5 is made up of central tube 10, urceolus 11 and blade 12; Urceolus 11 cross section is circular, and diameter is dw, general dw span 1/2D ~ 4/5D; As Fig. 6, blade 12 plane and horizontal plane angle are s, and blade 12 upper end and horizontal plane angle are r; The scope of general s is 30 ° ~ 50 °, and the scope of r is 10 ° ~ 40 °; Blade 12 quantity is 6 ~ 72.
As Fig. 2, eddy current demister 2 is at the wet-esp port of export, and its upper end is L2 apart from tubular anode plate 3 lower end distance; The span of general L2 is 10 ~ 30mm; Eddy current demister 2 is made up of central tube 10, urceolus 11 and blade 12; Urceolus 11 diameter is dc, and general dc span is 2/5D ~ 1/2D; Blade 12 plane and horizontal plane angle are s, and blade 12 lower end and horizontal plane angle are r; The scope of general s is-30 ° ~-50 °, and the scope of r is-10 ° ~-40 °; Blade 12 quantity is 6 ~ 72.
Claims (9)
1. a wet static dedusting demister, it is characterized in that: the tubular structure adopting vertical, center is cathode line (4), is around tubular anode plate (3), and tubular anode plate (3) upper and lower side is fixing on the support structure; Flue gas can from bottom to top adverse current, also can following current from top to bottom enter in electric cleaner; When counter-flow arrangement, from top, be furnished with flooding nozzle (1), negative electrode upper support structure (9), eddy current demister (2), anode upper support structure (8), anode lower support structure (7), eddy current distributor (5), negative electrode lower support structure (6) from top to bottom successively; When down current arrangement, from top, be furnished with flooding nozzle (1), negative electrode upper support structure (9), eddy current distributor (5), anode upper support structure (8), anode lower support structure (7), eddy current demister (2), negative electrode lower support structure (6) from top to bottom successively at device.
2. the wet static dedusting demister according to claim (1), it is characterized in that: described cathode line (4) is corrosion-resistant metal alloys material, be arranged in the center of tubular anode plate (3), for the solid or hollow circular-tube between diameter 5 ~ 10mm, (4) are evenly equipped with prickle or acupuncture to cathode line, prickle material is identical with cathode line (4), and prickle is welded in cathode line (4).
3. wet static dedusting demister according to claim 1, is characterized in that: tubular anode plate (3) inner core is non-metallic material, and tubular anode plate (3) outer felt is around layer of metal coil.
4. wet static dedusting demister according to claim 1, is characterized in that: eddy current distributor (5) is made up of one group of concentric spiral board, is bolted in cathode line (4); Eddy current distributor (5) is nonmetal electrically non-conductive material; Tubular anode plate (3) is front is also provided with a pre-arcing region.
5. wet static dedusting demister according to claim 1, it is characterized in that: eddy current demister (2) is made up of one group of concentric spiral board, be fixed in cathode line (4) by bolt-center, periphery and tubular anode plate (3) keep certain interval.Eddy current demister (2) is nonmetal electrically non-conductive material; Its spiral board choice direction is contrary with eddy current distributor (5).
6. wet static dedusting demister according to claim 1, it is characterized in that: when counter-flow arrangement, tubular anode plate (3) perimeter of section is c, area of section is s, and its equivalent internal diameter is D (D=4s/c); The length of whole wet electrical dust precipitator is L, and eddy current distributor (5) is at wet-esp arrival end, and its lower end is L3 apart from the pre-arcing region distance of negative electrode lower support structure, and its upper end is L1 apart from the distance of anode lower end; It is the time of staying that the selection of 2m/s ~ 4m/s, L meets gas in positive plate is 0.5s ~ 1.5s that the selection of internal diameter D meets gas flow rate range in positive plate; L1 span is 10 ~ 30mm, L3 span is 200 ~ 500mm; Eddy current distributor (5) is made up of central tube (10), urceolus (11) and blade (12); Urceolus (11) cross section is circular, and diameter is dw, general dw span 1/2D ~ 4/5D; Blade (12) plane and horizontal plane angle are s, and blade (12) upper end and horizontal plane angle are r; The scope of general s is 30 ° ~ 50 °, and the scope of r is 10 ° ~ 40 °; Blade (12) quantity is 6 ~ 72.
7. wet static dedusting demister according to claim 1, is characterized in that: when counter-flow arrangement, and eddy current demister (2) is at the wet-esp port of export, and its lower end is L2 apart from positive plate upper end distance; The span of L2 is 10 ~ 30mm; Eddy current demister (2) is made up of central tube (10), urceolus (11) and blade (12); Urceolus (11) diameter is dc, general dc span 2/5D ~ 1/2D; Blade (12) plane and horizontal plane angle are s, and blade (12) lower end and horizontal plane angle are r; The scope of general s is-30 ° ~-50 °, and the scope of r is-10 ° ~-40 °; Blade (12) quantity is 6 ~ 72.
8. wet static dedusting demister according to claim 1, it is characterized in that: when down current arrangement, deduster tubular anode plate (3) perimeter of section is c, area of section is s, and its equivalent internal diameter is D (D=4s/c); The length of whole wet electrical dust precipitator is L, and eddy current distributor (5) is at wet-esp arrival end, and its upper end is L3 apart from the distance of negative electrode upper support structure, and its lower end is L1 apart from the distance of anode upper end; It is the time of staying that the selection of 2m/s ~ 4m/s, L meets gas in positive plate is 0.5s ~ 1.5s that the selection of general internal diameter D meets gas flow rate range in positive plate; General L1 span is 10 ~ 30mm, L3 span is 200 ~ 500mm; Eddy current distributor (5) is made up of central tube (10), urceolus (11) and blade (12); Urceolus (11) cross section is circular, and diameter is dw, general dw span 1/2D ~ 4/5D; Blade (12) plane and horizontal plane angle are s, and blade (12) upper end and horizontal plane angle are r; The scope of general s is 30 ° ~ 50 °, and the scope of r is 10 ° ~ 40 °; Blade (12) quantity is 6 ~ 72.
9. wet static dedusting demister according to claim 1, is characterized in that: when down current arrangement, and eddy current demister (2) is at the wet-esp port of export, and its upper end is L2 apart from tubular anode plate (3) lower end distance; The span of general L2 is 10 ~ 30mm; Eddy current demister (2) is made up of central tube (10), urceolus (11) and blade (12); Urceolus (11) diameter is dc, and general dc span is 2/5D ~ 1/2D; Blade (12) plane and horizontal plane angle are s, and blade (12) lower end and horizontal plane angle are r; The scope of general s is-30 ° ~-50 °, and the scope of r is-10 ° ~-40 °; Blade (12) quantity is 6 ~ 72.
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| CN105194934A (en) * | 2015-10-27 | 2015-12-30 | 浙江天地环保工程有限公司 | Demisting and dedusting device for wet chimney of coal-fired power plant |
| CN105457753A (en) * | 2015-12-29 | 2016-04-06 | 上海克莱德贝尔格曼机械有限公司 | Tubular electrode demisting and dust removing device |
| CN105562207A (en) * | 2016-02-02 | 2016-05-11 | 北京清新环境技术股份有限公司 | Tube-bundle dust and mist removal device |
| CN105561722A (en) * | 2015-12-29 | 2016-05-11 | 上海克莱德贝尔格曼机械有限公司 | Honeycomb electrode demisting and dedusting apparatus |
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| CN105561722A (en) * | 2015-12-29 | 2016-05-11 | 上海克莱德贝尔格曼机械有限公司 | Honeycomb electrode demisting and dedusting apparatus |
| CN105562207A (en) * | 2016-02-02 | 2016-05-11 | 北京清新环境技术股份有限公司 | Tube-bundle dust and mist removal device |
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| CN104923405B (en) | 2017-06-20 |
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