CN205308571U - Coupling electrostatic dust collection system futilely wets - Google Patents
Coupling electrostatic dust collection system futilely wets Download PDFInfo
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- CN205308571U CN205308571U CN201521130955.5U CN201521130955U CN205308571U CN 205308571 U CN205308571 U CN 205308571U CN 201521130955 U CN201521130955 U CN 201521130955U CN 205308571 U CN205308571 U CN 205308571U
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Abstract
The utility model discloses a coupling electrostatic dust collection system futilely wets, inside including multistage electric field, the board that gathers dust of final stage electric field be the wet -type polar plate, and the water distribution that the top of wet -type polar plate was equipped with the multirow perpendicular to or favoured the wet -type polar plate is violently managed, and the water of whenever arranging is violently managed and is equipped with a plurality of water distribution micropores, and the bottom of final stage electric field utilizes the headtotail through water -collection device and buck processing cycle, realization water source cyclic utilization is violently managed through advancing the water piping connection water distribution in centrifuge or flocculation and precipitation groove. The beneficial effects of the utility model are that: wet -type polar plate place electric field matches rather than the front end electric field the requirement of flue -gas temperature, the velocity of flow, running voltage etc. So actually reforming transform the in -process, can remain original electrostatic precipitator's shell, is aided with the sparge water system, can accomplish the transformation, and the improvement project volume is little, and the expense is low, the flexible polar plate of water distribution system's design cooperation realize water not with flue gas direct contact, the cooling influences very for a short time to the flue gas in the event, has avoided the dewfall of flue gas, has avoided the damage to follow -up equipment simultaneously.
Description
Technical field
This utility model relates to gas cleaning technical field of environment protection equipment, is specifically related to dry-wet-coupled electrostatic precipitation system.
Background technology
On December 2nd, 2015, Executive Meeting of the State Council determines that coal-burning power plant implements in full minimum discharge and reducing energy consumption, and gross coal consumption rate and disposal of pollutants are greatly reduced. And " coal electricity energy-saving and emission-reduction upgrading and transformation action plan (2014-2020) " that 2014 issue once specified, to complete the ultra-clean discharge transformation of eastern region at the bottom of the year two thousand twenty. The resolution of this time Executive Meeting of the State Council, it was shown that the country's far super expection of management to coal-fired flue-gas.
Single for the discharge of particulate matter, end adopts Limestone-gypsum Wet Flue Gas Desulfurization Process+wet cottrell dedusting can realize ultra-clean the discharge (< 5mg/m of final flue gas particles3) even " nearly zero " discharge, technology relative maturity. But, for adopting desulfuration in furnace or the outer semi-dry desulphurization of desulfuration in furnace+stove, end adopts the coal unit of electrostatic precipitator or sack cleaner dedusting, it is achieved the ultra-clean discharge of final flue gas particles is extremely difficult. In recent years, particulate matter for the coal unit of the above-mentioned type reduces discharging, attempt by increasing electric field number, change electricity bag compound, end electric field changes rotation electrode into, changes the modes such as high frequency electric source and increase removal efficiency, but from Practical Project example it can be seen that improvement expenses is huge on the one hand, on the other hand, the discharge of particulate matter still can not be ultra-clean requirement, and in deashing process, excessively reduce the temperature of flue gas, and it being unfavorable for that alternative energy utilizes, this becomes the difficult problem that industry is urgently to be resolved hurrily.
Utility model content
The purpose of this utility model is to provide a kind of dry-wet-coupled electrostatic precipitation system, and it can realize the ultra-clean discharge efficient utilization with water resource of flue gas particles.
In order to reach above-mentioned purpose, this utility model adopts the following technical scheme that
Dry-wet-coupled electrostatic precipitation system, inside includes multistage electric field, the dust collection plate of final stage electric field is wet type pole plate, wet type pole plate is flexible plate, multiple rows of water distribution transverse tube it is provided with in final stage electric field, wet type pole plate be arranged over multiple rows of water distribution transverse tube being transversely or obliquely relative to wet type pole plate, often arrangement water transverse tube is provided with multiple water distribution micropore to wet type pole plate water spray to form moisture film deashing, the bottom of final stage electric field is connected with ash water treatment cycle utilization system by captation, water distribution micropore is uniformly arranged, to form uniform water film, wet type pole plate is flexible plate, or flexible material is covered on rigid plate surface, flexible plate material is organic synthetic fibers, capillarity due to fabric, water is rapidly absorbed, and decay resistance is more excellent, intensity stabilization is reliable, avoid contacting with the direct of flue gas simultaneously,Captation is hollow back taper round platform.
Generally, the surface tension of rigid plate and machining deviations from planarity problem, make the flushing water can not be completely uniform on surface, flushing water can trend towards through dust collecting electrode surface forming " droplet ", thus " channel " and dry spot point can be formed in dust collecting electrode, the place that such current do not flush causes the accumulation of grit, hardens, and dismantles cleaning not in time, just causes that dust collecting electrode and discharge electrode lost efficacy; And adopt flexible plate, due to the capillarity of fabric so that surface study of water film distribution is uniform, because having good wettability, so this structure water-saving more; And detachable maintaining is convenient.
Further, described ash water treatment cycle utilization system is centrifuge or flocculation sediment groove, and ash water treatment cycle utilization system realizes water source by water inlet pipe connection water distribution transverse tube and recycles; Or water distribution transverse tube is supplied water by other water sources.
Further, described ash water treatment cycle utilization system will be arranged outside the mud filtered by slush pump.
Further, the water distribution branch pipe being provided with between adjacent described multiple rows of water distribution transverse tube vertically or be obliquely installed, described water distribution micropore is arranged with the non-same plane of wet type pole plate, such respective outer side edges flexible plate and then avoid directly contacting of water and flue gas, specifically, the pitch of holes of water distribution micropore is 10～40mm, aperture is 1.0～4.0mm, the water outlet median plane of water distribution micropore and the angle of pole plate are 3～40 °, simultaneously, the upper end of wet type pole plate is connected with water distribution transverse tube or against the water effective wetting flexible plate of so that water distribution micropore ejection.
Further, flue gas sequentially passes through multistage electric field, and the entrance and exit of flue gas is located at the sidewall of dust pelletizing system so that flow of flue gas direction is parallel with water distribution transverse tube.
Further, described ash water treatment cycle utilization system is connected with technique water tank.
Further, the bottom of the electric field except final stage electric field is connected to ash storehouse by pipeline.
Further, described water distribution micropore is arranged with the non-same plane of wet type pole plate.
Operation principle of the present utility model is: existing electrostatic precipitator is transformed, retain its what electric field front and shell, by the dust collection plate of final stage electric field is replaced by wet type pole plate, form dry-wet-coupled electrostatic precipitator, and cross the reasonable water distribution of water distribution micropore of water distribution transverse tube, utilize the dust stratification on the effect deashing pole plate of moisture film, enter water a small amount of loss due to smoke evaporative of dry-wet-coupled electrostatic precipitation system, but major part water carries the dust stratification outflow system on pole plate secretly, forms buck. Supernatant and lower floor's mud two-layer can be divided into after buck machine by centrifugation or flocculation sediment groove. Supernatant blowback dry-wet-coupled electrostatic precipitation, recycles; The dust stratification overwhelming majority owing to rinsing from wet dust collection pole plate is made up of (PM2.5) fine particle, and rich in glass microballoon, lower floor's mud can transport outward the insulation material producing high added value. System is transported outward, due to smoke evaporative and mud, the water loss caused and can be supplemented by plant area's fresh water (FW).
The beneficial effects of the utility model are:
(1) original electrostatic precipitator final stage Electrode form is simply made a change by dry and wet electrostatic precipitator, but solve original cleaner unit reentrainment of dust, inverse corona, to problems such as fine particle removal efficiency are low, it may be achieved ultra-clean the discharge (< 5mg/m of flue gas particles3)。
(2) although dry and wet electrostatic precipitator or process system need real-time online to spray water, but buck can efficiently utilize, the overwhelming majority returns dust pelletizing system with the form of supernatant after layering, and the lower floor's mud rich in glass microballoon can transport outward to produce the insulation material of high added value.
(3) anode superstructure micropore water distribution and the useful combination of flexible plate, only needs a small amount of water distribution pole plate to get final product quickly, be formed uniformly liquid film, and compared with the pole plate of other forms, total cloth water yield is remarkably decreased.
(4) requirement of flue-gas temperature, flow velocity, working voltage etc. is mated by wet type pole plate place electric field with its front end electric field very much, therefore in actual transformation process, the shell of original electrostatic precipitator can be retained, only the pole plate form of final stage electric field is changed, and it is aided with flushing water system, can completing transformation, improvement project amount is little, and expense is low.
(5) the design fits flexible plate of water distribution system realizes water and does not directly contact with flue gas, therefore flue gas cool-down impact is very little, it is to avoid the condensation of flue gas, avoids the damage to follow-up equipment simultaneously.
Accompanying drawing explanation
Fig. 1 is this utility model one dry-wet-coupled electrostatic precipitation process schematic representation,
Fig. 2 is wet type pole plate water-distributing device top view;
Wherein: 1-DC high-voltage power supply, 2-electrostatic precipitator one electric field, 3-electrostatic precipitator two electric field, 4-electrostatic precipitator three electric field, 5-electrostatic precipitator four electric field, 6-wet type flexible plate, 7-technique water tank, 8-circulating pump, 9-horizontal centrifuge or flocculation sediment groove, 10-slush pump, 11-1～11-4 water distribution transverse tube, 12-water distribution micropore, 13-water inlet manifold, 14-water distribution branch pipe, 15-anode superstructure, I～III exhaust gases passes.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out clear, complete description.
As illustrated in fig. 1 and 2, for 150MW circulating fluidized bed combustion coal generating set, the technique that flue gas desulfurization adopts is desulfuration in furnace, and former dust pelletizing system adopts 4 E field electrostatic precipitator, cleaner unit input gas temperature 120 DEG C, inlet particle substrate concentration 6600mg/m3, export particle concentration 20mg/m3, modern wet type flexible plate 6 that the dust collecting pole plate of the 4th electric field is replaced by, and first electric field the 2, second electric field the 3, the 3rd electric field the 4, the 4th electric field 5, DC high-voltage power supply 1 all remain unchanged with cleaner unit device housings, as illustrated in fig. 1 and 2. the supernatant that horizontal centrifuge or flocculation sediment groove 9 produce is entered in the anode superstructure 15 being arranged in the 4th electric field 5 through circulating pump 8 by water inlet manifold 13, water distribution transverse tube 11-1～11-4 and water distribution branch pipe 14 that anode superstructure 15 is evenly arranged by multiple rows of spaced setpoint distance form, and supernatant is realized in anode superstructure 15 quickly by water distribution transverse tube 11-1～11-4, water distribution branch pipe 14, is uniformly distributed, in factory, technique water tank 7 is for the supplementary water to system. final supernatant is sprayed by the water distribution micropore 12 being arranged on water distribution transverse tube 11-1～11-4 bottom surface, wet type flexible plate 6 upper end is connected with the end face of water distribution transverse tube or arranges with the non-same plane of wet type pole plate against realizing water distribution micropore 12, the supernatant of water distribution micropore 12 ejection realizes the moistening of wet type flexible plate 6, and it is formed on moisture film, and hang on the space in the 4th electric field 5, flue gas is from the exhaust gases passes I between wet type flexible plate 6, II, III flows through, particulate matter in flue gas is captured on wet type flexible plate 6 under the effect of electric field, and carried by the moisture film on pole plate, form buck. the cloth water yield that in the present embodiment, wet type flexible plate 6 is total is 47.5m3, the grey water yield of formation is 40m3/ h, dry-wet-coupled electrostatic precipitator exit gas temperature is 105 DEG C, and buck realizes layering after horizontal centrifuge or flocculation sediment groove 9 are centrifuged or stand, and supernatant recycles. Slurry content is discharged by slush pump, and slurry content is rich in glass microballoon, can be used for producing excellent thermal insulating product after being transported outward by the vehicles.
The above is only preferred implementation of the present utility model; it should be pointed out that, for those skilled in the art, under the premise without departing from this utility model principle; can also making some improvements and modifications, these improvements and modifications also should be regarded as protection domain of the present utility model.
Claims (7)
1. dry-wet-coupled electrostatic precipitation system, inside includes multistage electric field, it is characterized in that, the dust collection plate of final stage electric field is wet type pole plate, wet type pole plate is flexible plate, wet type pole plate be arranged over multiple rows of water distribution transverse tube being transversely or obliquely relative to wet type pole plate, often arrangement water transverse tube is provided with multiple water distribution micropore and sprays water to wet type pole plate, and the bottom of final stage electric field is connected with grey water treatment cycle utilization system by captation.
2. dry-wet-coupled electrostatic precipitation system as claimed in claim 1, it is characterised in that described ash water treatment cycle utilization system is centrifuge or flocculation sediment groove, and ash water treatment cycle utilization system connects water distribution transverse tube by water inlet pipe.
3. dry-wet-coupled electrostatic precipitation system as claimed in claim 1 or 2, it is characterised in that described ash water treatment cycle utilization system will be arranged outside the mud filtered by slush pump.
4. dry-wet-coupled electrostatic precipitation system as claimed in claim 1 or 2, it is characterised in that the water distribution branch pipe being provided with between adjacent described multiple rows of water distribution transverse tube vertically or being obliquely installed.
5. dry-wet-coupled electrostatic precipitation system as claimed in claim 3, it is characterised in that described ash water treatment cycle utilization system is connected with technique water tank.
6. dry-wet-coupled electrostatic precipitation system as claimed in claim 1 or 2, it is characterised in that the bottom of the electric field except final stage electric field is connected to ash storehouse by pipeline.
7. dry-wet-coupled electrostatic precipitation system as claimed in claim 1 or 2, it is characterised in that described water distribution micropore is arranged with the non-same plane of wet type pole plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521130955.5U CN205308571U (en) | 2015-12-29 | 2015-12-29 | Coupling electrostatic dust collection system futilely wets |
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| CN201521130955.5U CN205308571U (en) | 2015-12-29 | 2015-12-29 | Coupling electrostatic dust collection system futilely wets |
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| CN205308571U true CN205308571U (en) | 2016-06-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105583076A (en) * | 2015-12-29 | 2016-05-18 | 山东神华山大能源环境有限公司 | Dry and wet coupling electrostatic dust collection system and dust collection technology |
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- 2015-12-29 CN CN201521130955.5U patent/CN205308571U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105583076A (en) * | 2015-12-29 | 2016-05-18 | 山东神华山大能源环境有限公司 | Dry and wet coupling electrostatic dust collection system and dust collection technology |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170912 Address after: 100011 Beijing, Dongcheng District Anwai Binhe West Road No. 22 Shenhua building Co-patentee after: CHINA ENERGY SAVING REDUCTION CO., LTD. Patentee after: Shenhua Group LLC Co-patentee after: Shandong Shenhua Shan great energy environment Co., Ltd Co-patentee after: Shandong University Energy & Environment (Qufu) Co., Ltd. Address before: 250014 Shandong Province, Ji'nan, Lishan Mountain Road, No. 173, south of the county seat B, layer four Co-patentee before: Shandong University Energy & Environment (Qufu) Co., Ltd. Patentee before: Shandong Shenhua Shan great energy environment Co., Ltd |
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| TR01 | Transfer of patent right |