CN105817325A - Wet type electric dust collector with pre-coagulation function - Google Patents
Wet type electric dust collector with pre-coagulation function Download PDFInfo
- Publication number
- CN105817325A CN105817325A CN201610295290.6A CN201610295290A CN105817325A CN 105817325 A CN105817325 A CN 105817325A CN 201610295290 A CN201610295290 A CN 201610295290A CN 105817325 A CN105817325 A CN 105817325A
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- CN
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- Prior art keywords
- coalescence
- dust precipitator
- electrical dust
- wet electrical
- heat exchanger
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/02—Plant or installations having external electricity supply
- B03C3/16—Plant or installations having external electricity supply wet type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/01—Pretreatment of the gases prior to electrostatic precipitation
- B03C3/014—Addition of water; Heat exchange, e.g. by condensation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/40—Electrode constructions
- B03C3/41—Ionising-electrodes
- B03C3/43—Ionising-electrodes radioactive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/40—Electrode constructions
- B03C3/45—Collecting-electrodes
- B03C3/49—Collecting-electrodes tubular
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/74—Cleaning the electrodes
- B03C3/78—Cleaning the electrodes by washing
Abstract
The invention provides a wet type electric dust collector with a pre-coagulation function. The wet type electric dust collector is aimed at solving the problem that the efficiency of dust removal of an existing wet type electric dust collector to superfine dust particles is low. The wet type electric dust collector is arranged on the top of a desulfurizing absorption tower and mainly comprises a wet type electric dust collector body and a coagulation heat exchanger; the wet type electric dust collector body is arranged above the coagulation heat exchanger and is mainly composed of a cathode line, a cathode frame, a cathode hanging part and an anode assembly; the coagulation heat exchanger is mounted between an outlet of the desulfurizing absorption tower and the wet type electric dust collector body; and flushing devices are arranged above the wet type electric dust collector body and the coagulation heat exchanger correspondingly. Smoke gas to be treated sequentially passes through the desulfurizing absorption tower, an absorption tower outlet flue, a phase change coagulation flow equalizing chamber, the wet type electric collector body and a dust remover outlet flue sequentially from bottom to top, and is exhausted through a chimney.
Description
Technical field
The technique that the present invention relates to a kind of wet-esp to the fine contaminant particle laggard high voltage electric field of coalescence in advance below PM10 micron in wet flue gas, belongs to flue gas advanced purification technology field.
Background technology
The fine particle specific surface area of less than 10 microns is big, strong to poisonous organic pollution, heavy metal etc. noxious substance.These particulate matters, because particle diameter is less, suspends in an atmosphere, are difficult to diffusion, and the impact on health and atmosphere quality is the biggest.
Combustion of industrial boiler emission source is the main source of below PM10 fine particle.Along with the promulgation of new " atmosphere pollutants emission standards " (GB13271-2014), coal-burning boiler smoke dust discharge concentration is by original 50mg/m3It is reduced to 30mg/m3, key area is reduced to 20mg/m3.In the face of new requirement higher dust exhausting concentration limit value, original cleaner of coal-burning boiler has been difficult to reach standard.
In current various novel dust removing technology, wet-esp is to ensure that the effective technology means of emission compliance.But, some fine particle electric field forces are difficult to overcome stoke resistance, in high voltage electric field interval enrichment to the pole plate of anode region, reduce the efficiency of dust collection of wet electrical dust precipitator.The wettest except efficiency only 60-80%, the space that tool has greatly improved.
Summary of the invention
For the deficiency that existing wet electrical dust precipitator is relatively low to the efficiency of dust collection of ultrafine dust granule, the present invention provides a kind of wet electrical dust precipitator having pre-coalescence function.
The present invention is achieved through the following technical solutions:
A kind of wet electrical dust precipitator with pre-coalescence function, this wet electrical dust precipitator is arranged in desulfuration absorbing tower top, mainly include wet electrical dust precipitator and coalescence heat exchanger, wet electrical dust precipitator is arranged at above coalescence heat exchanger, wet electrical dust precipitator is mainly made up of cathode line, cathode frame, cathode hanger and anode assemblies, coalescence heat exchanger is arranged between the outlet of absorption tower demisting device and wet electrical dust precipitator, and the top of wet electrical dust precipitator and coalescence heat exchanger is respectively equipped with flusher.
During work, pending flue gas sequentially passes through desulfuration absorbing tower, coalescence heat exchanger, wet electrical dust precipitator from bottom to top, chimney discharge.
The design further of the present invention is:
Coalescence heat exchanger uses the hosepipe binding structure of simmering and bending, and the entrance and exit of hosepipe bundle is connected to header, and header is connected by female pipe with open tank.
The material of hosepipe bundle and header is TA2, and the two is fixed by pipeline, and TA2 material contributes to strengthening surface heat exchanging, is also adapted to wet except the flue gas condition of severe corrosive simultaneously.
Coalescence heat exchanger uses the dislocation of upper and lower two-layer hosepipe bundle to arrange, flue gas flow-disturbing is disturbed when skimming over tube wall, strengthens heat transfer effect.Owing to there is temperature difference between flue gas and tube wall, the water condensation in flue gas adheres to fine dust, and fine dust reforms into the drop of band nucleus.
The specification of the tube bank of Serpentis type is φ 8～12 × 1(wall thickness) mm, in layer, tube pitch is 30～40mm, and interlamellar spacing is 40～60mm.
During work, the dust of less than 10 microns be condensed drop cladding after particle diameter rise to more than 20 microns, drop to 10 than resistance10Ω .cm, the best effort that the dust physical characteristic after coalescence is in wet electrical dust precipitator is interval.
The anode of wet electrical dust precipitator anode assemblies is regular hexagon tube bank, and hexagonal inscribed circle diameter is 300～400mm, a length of 3～5m.Basic material is vinyl fiberglass, the carbon cloth of inner surface lining conduction.
The cathode line of wet-esp uses efficient six pin hollow wires, and four insulation porcelain pull bars that cathode frame is hung by top side are fixed with supporting surface, and the insulating segment of insulation porcelain pull bar is with inner heating device, it is ensured that insulation resistance is more than 1G Ω.
The present invention has the advantage that compared to existing technology
(1) present invention increases coalescence heat exchanger at wet electrical dust precipitator entrance, flue gas is carried out heat exchange cooling, the droplet of condensation sweeps along the solidifying long greatly bulky grain droplet of fine dust granule, bulky grain droplet carrying capacity in high-voltage electrostatic field increases, point to more easily along electric lines of force and migrate, thus improve the dedusting efficiency except mist of wet electrical dust precipitator, reduce fine dust escapement ratio.
(2) flue gas concentration of liquid drops after the coalescence heat exchanger of the present invention increases, and can improve secondary voltage value 10-15% of wet-esp, contributes to wet except efficiency raising 10%.
(3) the coalescence heat exchanger of the present invention is made up of the snakelike tube bank of the TA2 being alternately arranged, and TA2 material heat conductivility is better than nonmetal anticorrosive material, and the heat exchange area of equal heat exchange amount to decline 30～50%, and the volume of whole device is relatively small.The alternately tube bank of Heterogeneous Permutation composition, flue gas flow equalizing is disperseed, and flue gas shuttles back and forth at the hosepipe bundle of coalescence heat exchanger upper and lower layer Heterogeneous Permutation and detours, and coordinates being passed through of outside cooling medium, the saturated coalescence degree of saturated flue gas be can accurately control, flue gas cool-down 1～3 DEG C made.
(4) the wet electrical dust precipitator cathode structure of the present invention is the birdcage model of 4 suspentions, compares traditional negative electrode weight reduction more than 30%, and structural form is the lightest and the handiest.Negative electrode upper frame is connected with insulated hanging pole, and rigid tubular polar curve is as perpendicular muscle, and bottom suspension locating frame is base.When flue gas flow rate 4～6 meter per second, the secondary numerical stability of electric field.
(5) spray irrigation pipeline is set above the coalescence heat exchanger of the present invention and wet electrical dust precipitator, the periodically tube bank to wet electrical dust precipitator anode and coalescence heat exchanger is rinsed, flushing water falls into lower absorbent tower and can not increase emission newly directly as moisturizing.
(6) present invention can efficient removal fine particle and aerosol, solve flue dust, gypsum rain, aerosol, SO comprehensively3Etc. various contaminant problems, especially in Industrial Boiler and the petrochemical industry of middle and small scale exhaust gas volumn.
Accompanying drawing explanation
Fig. 1 is the wet electrical dust precipitator facade structures schematic diagram with pre-coalescence.
Fig. 2 is the wet electrical dust precipitator site plan of coalescence heat exchanger.
Fig. 3 is the wet electrical dust precipitator site plan of coalescence heat exchanger.
Fig. 4 is coalescence heat exchanger tube array schematic diagram.
Fig. 5 is coalescence heat exchanger dust-cleaning principle schematic diagram.
Labelling in figure:
1, coalescence heat exchanger；2, negative electrode lower frame；3, cathode line；4, negative electrode upper frame；5, cathode hanger；6, spray irrigation pipe；7, anode assemblies；8, outer tank.
Detailed description of the invention
Embodiment one:
As it is shown in figure 1, the wet electrical dust precipitator that the present invention has pre-coalescence function is arranged in desulfuration absorbing tower top (only providing absorption tower top structure in figure), mainly include wet electrical dust precipitator, coalescence heat exchanger 1, outer tank 8 and spray equipment.Wet electrical dust precipitator is arranged at above coalescence heat exchanger 1, wet electrical dust precipitator is mainly made up of negative electrode lower frame 2, cathode line 3, negative electrode upper frame 4, cathode hanger 5 and anode assemblies 7, coalescence heat exchanger 1 is arranged between the outlet of absorption tower demisting device and wet electrical dust precipitator, and the top of wet electrical dust precipitator and coalescence heat exchanger is respectively equipped with flusher, flusher includes flooding nozzle and spray irrigation pipe 6.Outer tank 8 is connected with the header of coalescence heat exchanger.
As shown in Figure 2, Figure 3, Figure 4, coalescence heat exchanger 1 uses the hosepipe bundle of simmering and bending, and the entrance and exit of hosepipe bundle is connected to header, and header is connected by female pipe with outer tank 8.In figure, coalescence heat exchanger 1 uses upper and lower two-layer hosepipe bundle dislocation arrangement mode.Fig. 4 Wave line represents air current flow, and arrow table asks air-flow from the bottom to top.
The specification of hosepipe bundle is φ 8～12 × 1mm, and in layer, tube pitch is 30～40mm, and interlamellar spacing is 40～60mm.The anode of anode assemblies is regular hexagon tube bank, and hexagonal inscribed circle diameter is 300～400mm, a length of 3～5m.Anode substrate material is vinyl fiberglass, the carbon cloth of inner surface lining conduction.The cathode line of wet-esp uses efficient six pin hollow wires, and four insulation porcelain pull bars that cathode frame is hung by top side are fixed with supporting surface, and the insulating segment of insulation porcelain pull bar is with inner heating device.
Wet electrical dust precipitator of the present invention is arranged in desulfuration absorbing tower top, and after apparatus of the present invention, in flue gas, remaining below PM10 fine dust and droplet are removed.
At the flue gas Gypsum Fibrosum that remaining pollutant are escaped based on droplet, the fine dust of below PM10 and absorption tower after denitration, dedusting and wet desulphurization that pulverized-coal fired boiler is discharged.These pollutant levels are low, granule thin, harm is big.Flue gas is directly entered wet electrical dust precipitator, efficiency of dust collection can only have 50～70%, if using the present invention's to have pre-coalescence wet electrical dust precipitator, flue gas first passes through the coalescence heat exchanger of TA2 snakelike tube bank composition, supersaturation water condensation in flue gas, being wrapped up wherein (principle is as shown in Figure 5) by fine solid particle, the particle diameter of droplet is more than 20 microns, and carrying capacity is also far longer than single dust granules.Droplets of these parcel dust enter moment after high voltage electric field and charged are adsorbed onto on pole plate, it is achieved efficiently trap.The wet electrical dust precipitator of the present invention is at entrance concentration 50mg/Nm3Time, outlet dust concentration can be less than 5mg/Nm3。
Embodiment two:
The aluminium oxide catalyst that oil refining industry uses is to use high-temperature roasting technique manufacture, manufacture process has a small amount of alumina powder escape, alumina powder can not charged and particle diameter less than 10 microns, flue gas is directly entered wet electrical dust precipitator, owing to aluminium oxide self-characteristic limits, efficiency of dust collection is only capable of reaching 30～50%.But flue gas is after the wet electrical dust precipitator that the present invention has coalescence heat exchanger, cigarette temperature declines 1～3 DEG C, gas phase water condensation becomes droplet, the alumina powder of porosity characteristic coalescence therewith, not only particle diameter increases to more than 40 microns, and charging performance improves decades of times because of the condensed water of the parcel on surface.Alumina powder granule after coalescence is trapped rapidly after entering electric field, and the alumina powder of trapping can continue to melt down utilization, obtains environmental protection and economical effects.
Claims (8)
1. a wet electrical dust precipitator with pre-coalescence function, it is arranged in desulfuration absorbing tower top, it is characterized in that: mainly include wet electrical dust precipitator and coalescence heat exchanger, wet electrical dust precipitator is arranged at above coalescence heat exchanger, wet electrical dust precipitator is mainly made up of cathode line, cathode frame, cathode hanger and anode assemblies, coalescence heat exchanger is arranged between the outlet of absorption tower demisting device and wet electrical dust precipitator, and the top of wet electrical dust precipitator and coalescence heat exchanger is respectively equipped with flusher.
The most according to claim 1, there is the wet electrical dust precipitator of pre-coalescence function, it is characterised in that: coalescence heat exchanger uses the hosepipe binding structure of simmering and bending, and the entrance and exit of hosepipe bundle is connected to header, and header is connected by female pipe with open tank.
The most according to claim 2, there is the wet electrical dust precipitator of pre-coalescence function, it is characterised in that: coalescence heat exchanger uses upper and lower two-layer hosepipe bundle dislocation arrangement mode.
4. there is according to Claims 2 or 3 the wet electrical dust precipitator of pre-coalescence function, it is characterised in that: hosepipe bundle and header use TA2 material, and the two connects by pipeline is fixing.
The most according to claim 4, there is the wet electrical dust precipitator of pre-coalescence function, it is characterised in that: the specification of hosepipe bundle is φ 8～12 × 1mm, and in layer, tube pitch is 30～40mm, and interlamellar spacing is 40～60mm.
6. there is according to claim 1,2 or 3 wet electrical dust precipitator of pre-coalescence function, it is characterised in that: the anode of anode assemblies is regular hexagon tube bank, and hexagonal inscribed circle diameter is 300～400mm, a length of 3～5m.
The most according to claim 6, there is the wet electrical dust precipitator of pre-coalescence function, it is characterised in that: anode substrate material is vinyl fiberglass, the carbon cloth of inner surface lining conduction.
The most according to claim 6, there is the wet electrical dust precipitator of pre-coalescence function, it is characterized in that: the cathode line of wet-esp uses efficient six pin hollow wires, four insulation porcelain pull bars that cathode frame is hung by top side are fixed with supporting surface, and the insulating segment of insulation porcelain pull bar is with inner heating device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610295290.6A CN105817325A (en) | 2016-05-06 | 2016-05-06 | Wet type electric dust collector with pre-coagulation function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610295290.6A CN105817325A (en) | 2016-05-06 | 2016-05-06 | Wet type electric dust collector with pre-coagulation function |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106390664A (en) * | 2016-12-06 | 2017-02-15 | 山东国舜建设集团有限公司 | Efficient static and rotational flow combined sulfuric acid mist synergic particle removing device for coal-fired flue gas |
| CN106621680A (en) * | 2016-11-22 | 2017-05-10 | 凯天环保科技股份有限公司 | Method and system for deeply removing dust from flue gas after wet desulfurization |
| CN107138016A (en) * | 2017-05-08 | 2017-09-08 | 浙江大学 | Based on many particulate matter coalescence reunion intensifying devices promoted and method |
| CN107149986A (en) * | 2017-07-03 | 2017-09-12 | 华美节能科技集团有限公司 | A kind of industrial waste-gas purifier |
| CN107321500A (en) * | 2017-06-29 | 2017-11-07 | 苏州艾特斯环保设备有限公司 | Electrostatic spray deduster |
| CN109046780A (en) * | 2018-07-22 | 2018-12-21 | 华电电力科学研究院有限公司 | A kind of collaboration condensation wet electrical dust precipitator and its working method |
| CN109405599A (en) * | 2018-11-22 | 2019-03-01 | 双良节能系统股份有限公司 | A kind of condensing heat exchanger and strengthened heat exchange method for high water capacity exhaust-gas treatment |
| CN111229465A (en) * | 2019-11-06 | 2020-06-05 | 浙江浩普环保工程有限公司 | Condensation wet-type electrostatic precipitator in coordination |
| CN111375259A (en) * | 2020-03-18 | 2020-07-07 | 北新建材(井冈山)有限公司 | Tube bank dust remover with flue gas cooling function |
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| CN205628290U (en) * | 2016-05-06 | 2016-10-12 | 江苏釜鼎能源科技有限公司 | Wet -type electrostatic precipitator with coalescence function in advance |
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| CN106621680A (en) * | 2016-11-22 | 2017-05-10 | 凯天环保科技股份有限公司 | Method and system for deeply removing dust from flue gas after wet desulfurization |
| CN106390664A (en) * | 2016-12-06 | 2017-02-15 | 山东国舜建设集团有限公司 | Efficient static and rotational flow combined sulfuric acid mist synergic particle removing device for coal-fired flue gas |
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| CN107321500A (en) * | 2017-06-29 | 2017-11-07 | 苏州艾特斯环保设备有限公司 | Electrostatic spray deduster |
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| CN109405599A (en) * | 2018-11-22 | 2019-03-01 | 双良节能系统股份有限公司 | A kind of condensing heat exchanger and strengthened heat exchange method for high water capacity exhaust-gas treatment |
| CN111229465A (en) * | 2019-11-06 | 2020-06-05 | 浙江浩普环保工程有限公司 | Condensation wet-type electrostatic precipitator in coordination |
| CN111229465B (en) * | 2019-11-06 | 2022-08-02 | 浙江浩普环保工程有限公司 | Condensation wet-type electrostatic precipitator in coordination |
| CN111375259A (en) * | 2020-03-18 | 2020-07-07 | 北新建材(井冈山)有限公司 | Tube bank dust remover with flue gas cooling function |
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| C06 | Publication | ||
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Application publication date: 20160803 |