CN105413379A - Wet method dedusting device - Google Patents
Wet method dedusting device Download PDFInfo
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- CN105413379A CN105413379A CN201511008019.1A CN201511008019A CN105413379A CN 105413379 A CN105413379 A CN 105413379A CN 201511008019 A CN201511008019 A CN 201511008019A CN 105413379 A CN105413379 A CN 105413379A
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- wet
- dust
- flue gas
- collector according
- ultrasonic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
Abstract
The invention discloses a wet method dedusting device. The wet method dedusting device comprises a supersonic wave atomizer used for spraying fine water mist towards a smoke flow channel to form a supersonic wave atomization region, a sound wave generator arranged at the lower position of the supersonic wave atomizer according to the smoke flow direction and used for establishing a sound field in the smoke flow channel to form a sound wave coagulation region, and a liquid drop catcher arranged at the lower position of the sound wave generator according to the smoke flow direction used for catching coagulated dust-containing liquid drops after going through the supersonic wave atomization region and the sound wave coagulation region to form a dust collection region. The place occupation, the total cost and operation expenses of the dedusting device after wet method desulphurization can be lowered greatly, waste water discharge of wet method dedusting is reduced, and ultraclean discharge of a chimney is achieved. In addition, because there is no high voltage electrostatic apparatus, internal members can be made of non-conductive corrosion-resistant non-metallic materials, and there are discharge burning operation risks.
Description
Technical field
The present invention relates to technical field of dust removal equipment, particularly the flue gas of discharge is carried out after wet desulphurization to the Wet-way dust-collector of mechanical and hydraulic combined dust.
Background technology
In recent years along with thermoelectricity installed capacity constantly increases, and the total amount increase discharged pollutants causes very large pressure to atmospheric environment, for the Scientific Outlook on Development of practicable country, new thermal power plant's pollutant emission standard (GB13223-2011) of promulgating formally is implemented on January 1st, 2012.
Along with the appearance of new standard, people also further improve the hazard of contaminant environment such as fine solid particle, acid mist, heavy metal and healthy understanding, country also can constantly improve atmosphere pollutants emission standards, and particularly PM2.5 is this will certainly become the Con trolling index of country to atmosphere pollutants emission standards to the great fine particulates of human health damage.And existing wet desulfurization system does not almost remove the ability of PM2.5 particle, to mercury and SO
3removing of aerosol etc. is also very limited, causes the downstream of chimney wind direction often to occur the phenomenon such as " acid rain ", " gypsum rain ", or has " blue smoke " phenomenon of long cigarette tail.
To this, prior art is all after wet desulphurization, set up wet-type high-voltage electrostatic precipitation device to ensure the ultra-clean discharge of chimney, and there is the wet-type high-voltage electrostatic precipitation device of multiple school, mainly contained that horizontal metal is board-like, horizontal type non-metallic is board-like, vertical nonmetal tubular type etc.
Mainly there is following defect in technique scheme:
One, although solve ultra-clean emission problem, being no matter the wet-type high-voltage electrostatic precipitation device of which school, is all the electrostatic dust collection principles being driven into dust collecting pole plate after utilizing dust charged through electric field force, its dust collection effect is subject to the impact of specific dust collection area and flue gas wind speed, specific dust collection area is larger, and flue gas wind speed is lower, and its dust-collecting efficiency is higher, but strengthen than laying dust area and reduce flue gas wind speed, all make body construction huge, occupied ground is more, and equipment manufacturing cost is too high.
Its two, any one wet-type high-voltage electrostatic precipitation device makes so because of its principle of gathering dust, and all needs the high-voltage electrostatic power of matched price costliness and the high voltage supply control appliance of complexity, and simultaneously power consumption is large, and operating cost is high.
They are three years old, the board-like wet cottrell of horizontal metal is due to wet-method desulfurized fume complicated and carry droplet secretly, there is very strong corrosivity, its inner part comprises dust collector pole and discharge electrode all adopts stainless steel, although have good efficiency of dust collection, further increasing equipment manufacturing cost, not being corroded for preventing stainless steel metal pole plate, also needing to spray flushing water continuously makes component formation moisture film reach anticorrosion and deashing effect, and water consumption is huge.Although partial flushing water circulation use, because water consumption is large, recycle and make water system equipment more complicated, cost is also higher, and the wastewater flow rate that row reclaims use to desulfurization is still too high, is often difficult to whole recycling.
They are four years old, although horizontal type non-metallic is board-like or vertical nonmetal tubular electrostatic precipitator solves the pole plate corrosion series of problems that brings, but because pole plate is nonmetallic materials, although have employed the measure strengthening conduction, its electric conductivity still can not show a candle to metal polar plate, therefore electric field can not obtain good C-V characteristic, have impact on efficiency of dust collection, want the efficiency of dust collection obtained and metal polar plate is equal, certainly will to strengthen than laying dust area, its equipment manufacturing cost is also not less than the electrostatic precipitator of metal plate type, and occupies more place.Moreover dust collecting pole plate adopts nonmetallic materials, due in electrostatic dust collection process, is easily attended by spark discharge, easily causes ablation, even cause catching fire to nonmetal pole plate, there is higher operation risk.
Therefore, how overcoming the defect that technique scheme exists, is those skilled in the art's technical issues that need to address.
Summary of the invention
The object of this invention is to provide a kind of Wet-way dust-collector.After this device can significantly reduce wet desulphurization, the place of cleaner takies and overall cost and operating cost, reduces the wastewater discharge of wet dedusting, reaches the ultra-clean discharge of chimney equally; Meanwhile, due to without high voltage electrostatic equipment, inner part can adopt non-conductive anti-corrosion nonmetallic materials, the operation risk of discharge off burning.
For achieving the above object, the invention provides a kind of Wet-way dust-collector, comprising:
Ultrasonic ultrasonic delay line memory, for spraying fine water-spray in flue gas flow channel, forms ultrasonic atomization district;
Sonic generator, is located at described ultrasonic ultrasonic delay line memory downstream by flue gas flow direction, for setting up sound field in flue gas flow channel, forms sound wave coalescence district;
Drop catcher, is located at described sonic generator downstream by flue gas flow direction, for trapping the dust-laden drop of coalescence behind described ultrasonic atomization spray district and sound wave condensation region, forms dust collection section.
Preferably, described drop catcher has some vertical exhaust gases passes, described exhaust gases passes undulate on flue gas flow direction, and its crest and trough position form eddy flow district.
Preferably, described drop catcher is provided with some vertical corrugated platings arranged in the form of a grill, forms described exhaust gases passes between described corrugated plating.
Preferably, the crest of described corrugated plating and trough position semicircular in shape.
Preferably, the waveform radius of described exhaust gases passes is 50mm ~ 200mm.
Preferably, the mist footpath of described ultrasonic ultrasonic delay line memory is 1 μm ~ 15 μm.
Preferably, the sound wave wave band of described sonic generator is 500Hz ~ 2000Hz.
Preferably, described flue gas flow channel comprises vertical-sprue and horizontal run, and described ultrasonic ultrasonic delay line memory and sonic generator are located at described vertical-sprue or horizontal run, and described horizontal run is located at by described drop catcher.
Preferably, comprise gathering-device further, it is located at below described drop catcher, for collecting the dust-laden drop that described drop catcher is discharged.
Preferably, described gathering-device comprises water-collecting tray and is located at the swash plate in described water-collecting tray, and described water-collecting tray is provided with floss hole at the low level place of described swash plate.
The present invention makes full use of the flue gas characteristic after wet desulphurization and the flue feature behind absorption tower, change traditional electrostatic precipitation mode, mechanical and hydraulic combined dust is realized with the form that ultrasonic ultrasonic delay line memory, sonic generator and drop catcher are combined, wherein, adopt ultrasonic ultrasonic delay line memory nebulization efficiency can be improved about 1000 times, saved water consumption, saved the power consumption of water system simultaneously, in like manner, the displacement of deduster also just reduces, and is easier to be recovered use; Make use of the flue gas characteristic after wet desulphurization, adopt the sonic agglomeration technology of common wave band, without the need to making, dust is charged can make dust coalescence, saves expensive high-pressure electrostatic power supply unit and the electric control system of complexity, saves equipment investment and power consumption; Utilize the high wind speed characteristic of micro-eddy flow principle, to adopt and the wind speed such as flue designs, decrease the section of deduster, decrease equipment size and place takies, save equipment investment further; In addition, the corrugated plating of drop catcher can adopt non-conductive common non-metal anti-corrosion material, and cost is lower, the corrosion-free risk of equipment, and simultaneously because without high voltage electrostatic equipment, no-spark discharge scenario occurs, also with regard to without ablation risk, equipment safety and reliability.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of detailed description of the invention of Wet-way dust-collector provided by the present invention;
Fig. 2 is the top view of Wet-way dust-collector shown in Fig. 1;
Fig. 3 is micro-eddy flow schematic diagram of drop catcher;
Fig. 4 is micro-eddy flow design sketch of drop catcher.
In figure:
1. desulfuration absorbing tower 2. flue gas flow channel 3. ultrasonic ultrasonic delay line memory 4. sonic generator 5. drop catcher 6. gathering-device 5-1. exhaust gases passes 5-2. corrugated plating 7. chimney
Detailed description of the invention
In order to make those skilled in the art person understand the present invention program better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to Fig. 1, Fig. 2, Fig. 1 is the structural representation of a kind of detailed description of the invention of Wet-way dust-collector provided by the present invention; Fig. 2 is the top view of Wet-way dust-collector shown in Fig. 1.
In a kind of specific embodiment, Wet-way dust-collector provided by the invention is arranged on the flue gas flow channel 2 after desulfuration absorbing tower 1, primarily of part compositions such as ultrasonic ultrasonic delay line memory 3, sonic generator 4, drop catcher 5 and gathering-devices 6, flue gas flow channel 2 comprises vertical-sprue and horizontal run, ultrasonic ultrasonic delay line memory 3 and sonic generator 4 are located at vertical-sprue, and horizontal run is located at by drop catcher 5.
Wherein, ultrasonic ultrasonic delay line memory 3, for spraying fine water-spray in flue gas flow channel, forms ultrasonic wave spray atomizing district A, can select the mist footpath parameter of 1 μm ~ 15 μm; Sonic generator 4 is located at ultrasonic ultrasonic delay line memory 3 downstream by flue gas flow direction, for setting up sound field in flue gas flow channel 2, forming sonic agglomeration district B, can select the wave band parameter of 500Hz ~ 2000Hz; Drop catcher 5 is located at sonic generator 4 downstream by flue gas flow direction, for trapping the dust-laden drop of coalescence after ultrasonic wave spray atomizing district A and sound wave coalescence district B, forms dust collection section C.
Gathering-device 6 is positioned at below drop catcher 5, for collecting the dust-laden drop that drop catcher 5 is discharged, be provided with swash plate in its water-collecting tray, and be provided with floss hole at the low level place of swash plate, the band cloud that can prevent from collecting by arranging swash plate drips splashing to be caused reentrainment of dust and affects efficiency of dust collection.
Certainly, diagram is only that typical flue is arranged, at horizontal run long enough, or when without vertical-sprue, range of atomization and coalescence district can be arranged on horizontal segment equally, as long as guarantee upstream-downstream relationship, and are not necessarily arranged on vertical-sprue.
Please also refer to Fig. 3, Fig. 4, Fig. 3 is micro-eddy flow schematic diagram of drop catcher; Fig. 4 is micro-eddy flow design sketch of drop catcher.
As shown in the figure, drop catcher 5 has some vertical exhaust gases passes 5-1, exhaust gases passes 5-1 undulate on flue gas flow direction, and its crest and trough position form eddy flow district.
Particularly, drop catcher 5 is provided with some vertical corrugated plating 5-2 (namely corrugated plating is vertically put) arranged in the form of a grill, the crest of corrugated plating 5-2 and trough position semicircular in shape, waveform exhaust gases passes 5-1 is formed between adjacent corrugated plating, the waveform radius of exhaust gases passes 5-1 can be controlled between 50mm ~ 200mm, such as waveform radius is r=50mm, 100mm, 150mm, 200mm, depending on dust operating mode and emission request, r value is less, efficiency of dust collection is higher, but resistance is larger.
Corrugated plating 5-2 height and spacing press the design of flue equal section, and length is determined according to dust operating mode and emission request, and length is longer, and efficiency of dust collection is higher, but resistance is larger.
The operation principle of above-mentioned Wet-way dust-collector is as follows:
First, in range of atomization, in flue gas, the fine water-spray in 1 ~ 15 μm of mist footpath is sprayed by the nozzle of ultrasonic ultrasonic delay line memory 3, from cloud physics principle, because the rapid evaporation of fine water-spray and cooling effect can make nearly saturated flue gas originally saturated fast, even reach hypersaturated state, supersaturated vapour can the nuclei of condensation such as Automatic-searching dust and saturation state is got back in condensation coring again, as the nuclei of condensation dust granules due to steam cohesion and close and increase, facilitation is played to follow-up trapping.
Then, in coalescence district, in flue gas flow channel, sound field is set up by sonic generator 4, from acoustic wave principles, the particle (comprising grit and water smoke grain) be in sound field produces vibration because being subject to the effect of sound wave, its vibration velocity rises with the reduction of particle diameter, the particle varied in size is impelled to carry out a large amount of positive power cohesions, make larger particle close from its far small-particle and and they collide, further cohesion also closes increase, produce sonic agglomeration effect, again, facilitate follow-up trapping.
Then, in dust collection section, grid-like corrugated plating 5-2 can the numerous microclone of quantity of formation, from hydrodynamics, when fluid flows through ripple grid, due to the sudden change of runner, as long as when fluid flowing has certain speed, a bit will start boundary layer separation occurs in certain of the convex surface of corrugated plating 5-2, the pressure of groove area is lower than the pressure of bulk flow, produce adverse pressure gradient, thus the bumpy flow formed as shown in Figure 3, larger drop after the coalescence of upstream is easy to collide with corrugated siding because of centrifugal action and be collected, less drop will be driven by bumpy flow to be assembled continuous coalescence increase toward center, water-collecting tray is dropped into again because of Action of Gravity Field, through the neat stress of dedusting from chimney 7 discharged to air.
Finally, water-collecting tray by dust-laden drop collect after discharge, arrange in it swash plate can anti-drippage band dirt fluid spills formed reentrainment of dust, improve efficiency of dust collection further.
Above-described embodiment is only preferred version of the present invention, is specifically not limited thereto, and can make pointed adjustment according to actual needs on this basis, thus obtain different embodiments.Such as, spray atomizing district A, common sound wave coalescence district B, micro-eddy flow dust collection section C, no matter each district is specifically arranged on which position of flue, or three subregions combine, or any combination of three subregions all lists protection scope of the present invention in.Because mode in the cards is more, just illustrate no longer one by one here.
Above Wet-way dust-collector provided by the present invention is described in detail.Apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands core concept of 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.
Claims (10)
1. a Wet-way dust-collector, is characterized in that, comprising:
Ultrasonic ultrasonic delay line memory, for spraying fine water-spray in flue gas flow channel, forms ultrasonic atomization district;
Sonic generator, is located at described ultrasonic ultrasonic delay line memory downstream by flue gas flow direction, for setting up sound field in flue gas flow channel, forms sound wave coalescence district;
Drop catcher, is located at described sonic generator downstream by flue gas flow direction, for trapping the dust-laden drop of coalescence behind described ultrasonic atomization spray district and sound wave condensation region, forms dust collection section.
2. Wet-way dust-collector according to claim 1, is characterized in that, described drop catcher has some vertical exhaust gases passes, described exhaust gases passes undulate on flue gas flow direction, and its crest and trough position form eddy flow district.
3. Wet-way dust-collector according to claim 2, is characterized in that, described drop catcher is provided with some vertical corrugated platings arranged in the form of a grill, forms described exhaust gases passes between described corrugated plating.
4. Wet-way dust-collector according to claim 3, is characterized in that, the crest of described corrugated plating and trough position semicircular in shape.
5. Wet-way dust-collector according to claim 2, is characterized in that, the waveform radius of described exhaust gases passes is 50mm ~ 200mm.
6. Wet-way dust-collector according to claim 1, is characterized in that, the mist footpath of described ultrasonic ultrasonic delay line memory is 1 μm ~ 15 μm.
7. Wet-way dust-collector according to claim 1, is characterized in that, the sound wave wave band of described sonic generator is 500Hz ~ 2000Hz.
8. the Wet-way dust-collector according to any one of claim 1 to 7, it is characterized in that, described flue gas flow channel comprises vertical-sprue and horizontal run, and described ultrasonic ultrasonic delay line memory and sonic generator are located at described vertical-sprue or horizontal run, and described horizontal run is located at by described drop catcher.
9. the Wet-way dust-collector according to any one of claim 1 to 7, is characterized in that, comprises gathering-device further, and it is located at below described drop catcher, for collecting the dust-laden drop that described drop catcher is discharged.
10. Wet-way dust-collector according to claim 9, is characterized in that, described gathering-device comprises water-collecting tray and is located at the swash plate in described water-collecting tray, and described water-collecting tray is provided with floss hole at the low level place of described swash plate.
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CN201511008019.1A CN105413379A (en) | 2015-12-29 | 2015-12-29 | Wet method dedusting device |
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Cited By (7)
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CN105952350A (en) * | 2016-07-07 | 2016-09-21 | 李宏江 | Environment-friendly smoke exhausting window |
CN106268159A (en) * | 2016-09-06 | 2017-01-04 | 上海应用技术大学 | A kind of exhaust gas processing device and processing method |
CN107081217A (en) * | 2017-05-23 | 2017-08-22 | 东南大学 | A kind of Combustion Source PM2.5Minimum discharge method and integrated coupled system |
CN108939787A (en) * | 2018-09-05 | 2018-12-07 | 南京恒瑞环保科技有限公司 | A kind of wet scraper of flue gas sound wave is to dust removal method and system |
WO2019051816A1 (en) * | 2017-09-16 | 2019-03-21 | 王元秀 | Air humidification standing-wave purifier |
CN109759233A (en) * | 2019-01-25 | 2019-05-17 | 东南大学 | A kind of system and method for collaboration processing desulfurization wastewater and reinforcing fine particle reunion and removing |
CN110182880A (en) * | 2019-05-21 | 2019-08-30 | 浙江浙能技术研究院有限公司 | A kind of high slat-containing wastewater flue gas drying processing unit |
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CN102527075A (en) * | 2012-02-25 | 2012-07-04 | 贵州永红航空机械有限责任公司 | Water-steam separator for cooler |
CN104147891A (en) * | 2014-08-25 | 2014-11-19 | 东南大学 | Device and method for controlling fine particle emission in wet flue gas desulfurization |
CN104307282A (en) * | 2014-09-12 | 2015-01-28 | 国家海洋局第三海洋研究所 | Device and method for synergic wet method flue gas desulphurization and fine grain removal |
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CN2605918Y (en) * | 2003-03-25 | 2004-03-10 | 重庆远达环保(集团)有限公司 | Wet flue desulfurizing and defogging device |
US20110067567A1 (en) * | 2009-09-21 | 2011-03-24 | Alstom Technology Ltd. | Method and system for regenerating a solution used in a wash vessel |
CN102527075A (en) * | 2012-02-25 | 2012-07-04 | 贵州永红航空机械有限责任公司 | Water-steam separator for cooler |
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105952350A (en) * | 2016-07-07 | 2016-09-21 | 李宏江 | Environment-friendly smoke exhausting window |
CN106268159A (en) * | 2016-09-06 | 2017-01-04 | 上海应用技术大学 | A kind of exhaust gas processing device and processing method |
CN106268159B (en) * | 2016-09-06 | 2018-08-14 | 上海应用技术大学 | A kind of exhaust gas processing device and processing method |
CN107081217A (en) * | 2017-05-23 | 2017-08-22 | 东南大学 | A kind of Combustion Source PM2.5Minimum discharge method and integrated coupled system |
WO2019051816A1 (en) * | 2017-09-16 | 2019-03-21 | 王元秀 | Air humidification standing-wave purifier |
CN108939787A (en) * | 2018-09-05 | 2018-12-07 | 南京恒瑞环保科技有限公司 | A kind of wet scraper of flue gas sound wave is to dust removal method and system |
CN109759233A (en) * | 2019-01-25 | 2019-05-17 | 东南大学 | A kind of system and method for collaboration processing desulfurization wastewater and reinforcing fine particle reunion and removing |
CN110182880A (en) * | 2019-05-21 | 2019-08-30 | 浙江浙能技术研究院有限公司 | A kind of high slat-containing wastewater flue gas drying processing unit |
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Application publication date: 20160323 |