CN104028068A - A multistage deduster - Google Patents

A multistage deduster Download PDF

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Publication number
CN104028068A
CN104028068A CN201410084772.8A CN201410084772A CN104028068A CN 104028068 A CN104028068 A CN 104028068A CN 201410084772 A CN201410084772 A CN 201410084772A CN 104028068 A CN104028068 A CN 104028068A
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CN
China
Prior art keywords
venturi
turbulent flow
flow system
tower body
water bath
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Pending
Application number
CN201410084772.8A
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Chinese (zh)
Inventor
沈幼民
欧志杰
陆建敏
丁煜芝
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Jiangsu Pola Environmental Protection Technology Co Ltd
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Jiangsu Pola Environmental Protection Technology Co Ltd
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Priority to CN201410084772.8A priority Critical patent/CN104028068A/en
Publication of CN104028068A publication Critical patent/CN104028068A/en
Pending legal-status Critical Current

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Abstract

A multistage deduster is disclosed. The multistage deduster comprises a deduster tower body (1), a spraying device (2), a Venturi turbulence system (4), an impact water bath device (5), a whirlwind plate (6) and a water film device (7). The top of the deduster tower body (1) is a wind inlet (3). The Venturi turbulence system (4) is vertically disposed in the middle of the cavity of the deduster tower body (1). The spraying device (2) is disposed above the Venturi turbulence system (4). The lower part outlet of the Venturi turbulence system (4) is connected to the impact water bath device (5). The whirlwind plate (6) is disposed at the periphery of the lower end of the Venturi turbulence system (4) and the upper end of the impact water bath device (5). The water film device (7) is disposed at the periphery of the upper end of the Venturi turbulence system (4), and is connected to a wind outlet (8). Dedusting of different stages is combined organically and can assist each other. The deduster is high in dedusting efficiency, simple to install and low in maintenance cost.

Description

A kind of multistage rotary dust collector
Technical field
The present invention relates to waste gas purification field, be specifically related to a kind of multistage rotary dust collector.
Background technology
As everyone knows; industrial enterprise particularly thermal power plant, chemical plant, steel plant, pharmaceutical factory etc. often can discharge large quantity of exhaust gas in process of production; in these waste gas, contain all kinds of toxic organicses and inorganic compound and dust; this type of dust more than 70% is that imbedibility dust is very big to harm; prevent and treat unfavorable pneumoconiosis and the angiocardiopathy of easily causing; the dust flying away drops on plant also can affect their photosynthesis; reduce the oxygen content of air; cause Global Greenhouse Effect; both endanger natural ecosystems, threatened again the mankind's living environment.Dust also can increase the heel and toe wear of equipment in addition, shorten the service life of equipment, so waste gas dedusting has become an instant challenge.
Deduster is roughly divided into sack cleaner, mechanical collector and electrostatic precipitator on the market at present, sack cleaner efficiency of dust collection high-performance is stablized but is born the limited in one's ability of high-temperature gas, while processing the high waste gas of moisture content, filter bag often easily coheres, stops up filter opening, and often needs replacing; Mechanical collector structure fills that simple cost is low, maintenance management is convenient can be high temperature resistant, but not high to the molecule clearance below 4 μ m; Electrostatic precipitator treating capacity is large, the pressure loss is little, maintenance cost is low but complex structure, cost are high.
Summary of the invention
The object of the invention is to solve the problems such as existing deduster efficiency of dust collection is low, cost is high, difficult maintenance, function singleness, a kind of multistage rotary dust collector is provided.
The present invention adopts following scheme to realize: a kind of multistage rotary dust collector: comprise dedusting tower body, spray equipment, Venturi turbulent flow system, impulse type water bath device, spiral board, moisture film device; The top of dedusting tower body is air inlet; Venturi turbulent flow system is vertically set on gas wash tower body cavity body central authorities, and spray equipment is arranged on Venturi turbulent flow system top; The lower part outlet of Venturi turbulent flow system is connected with impulse type water bath device; Upper end peripheral, impulse type water bath device, lower end in Venturi turbulent flow system is provided with spiral board, is arranged with moisture film device outside the top of Venturi turbulent flow system; Moisture film device is connected with air outlet.
Further, described spray equipment comprises water pipe and a plurality of nozzle.
Further, described impulse type water bath device is provided with overflow pipe.
In order to reach collapsible tube end or the trunnion place of the Venturi turbulent flow system described in better dust removing effects, be provided with washing nozzle.
Further, the position of plane is provided with overfall on slightly lower than moisture film device.
For more convenient maintenance, in the bottom of dedusting tower body, be provided with access hole.
Deduster dust-cleaning principle brief introductions at different levels
Spray system
In deduster, water is by nozzle atomisation, and when ash-laden gas passes through vaporific space, because of the collision between grit and drop, interception and cohesion, grit settles out with drop.The ability of processing fine dust due to spraying and dedusting is lower, thus be commonly used to remove the flue gas that dust size is large, dust content is high, as the pre-dedusting of follow up device.
Venturi turbulent flow system
The flue gas that contains dust enters after Venturi throat, and because trunnion basal area is constant, in pipe, static pressure drops to minimum, and remains unchanged, and now air-flow velocity reaches peak; Air-flow enters increaser, and because basal area is by expansion, in pipe, static pressure is restored gradually, and air-flow velocity also declines gradually.At collapsible tube end or trunnion place, by nozzle, introduce cleaning solution, the air velocity at this place is just very high, by nozzle, spray cleaning solution under the impact of high velocity air, further be atomized into more tiny droplet, and the relative velocity of gas, liquid, solid (grain dirt) three-phase is all very large, makes them be able to more fully mix, thereby has increased the chance of dust and droplets mixing, make most dust and drop be able to fully contact, reach dedusting object.On the other hand, because cleaning solution atomization is abundant, make the gas degree that reaches capacity, thereby destroyed the air film on grit surface, grit is soaked by steam completely.When gas enters after anemostat, these are by between the grit of water-wet and droplet, and between the grit or droplet of different-grain diameter, under the effect of different inertia force, mutually in collision contact, are being condensed into the dust-laden drop that particle diameter is larger.These thicker dust-laden drops enter lector level with air-flow.
Impact type system
High-efficiency impingement type wet dust collector uses high-pressure fog mode, and aqueous vapor area is increased greatly.The gas, liquid, solid phase reaction time lengthens, and dust removing effects is very good.
At venturi, shower nozzle is equipped with in import department, the ash material in the moistening flue gas of water smoke meeting of shower nozzle place ejection, and in this process, ash material is strengthened and is conducive to separated by moistening its weight that makes of water smoke.After this pass through air inlet pipe, and with the quite high velocity shock water surface, wherein most of grit is stayed in water because weight strengthens or sticks back with water, this stage is assault phase, after this stage produces, the water surface forms parabola shaped water droplet, water smoke and a foam regions because of the motion of gas, dusty gas in this region again further water droplet water smoke purify.This is the trickle bath stage.During again because of access arrangement, the temperature of flue gas is generally not less than 80 degree, in cylindrical shell, under the impact of flue gas, forms water smoke, and grit, changing direction, while moving upward, is further purified by water smoke again, and this stage is nebulization dust.
When the impulse piping of flue gas access arrangement, fastest, according to different dedusting air quantity, this speed is generally 12~50m/s, it is very slow that trickle is bathed stage speed, at atomization stage speed trace, accelerates, fast again at exit velocity, according to these several different velocity variations, can reach the effect of dedusting dehydration.
Spiral board system
From impact type system flue gas out, in cylindrical shell, rise, in uphill process because spiral board is made centrifugal motion.With pigment dirt, under the effect of inertia, get rid of to barrel.Simultaneously the liquid film on spiral board has increased with dust and has connect thick chance, connects the long-pending effect of asperities and makes dust adhering on spiral board, is rinsed water and cleans.
Moisture film system
Under the effect of centrifugal force, flue gas spiral enters Water Membrane Dedusting System, and the flue dust of flue dust and moistening cohesion is separated.Enter waste gas in water film dust removal device due to tangential effect, along spiral inner wall, rise, the water overflowing in the upper overflow tank of putting and spiralling gas reverse-impact, scrub thawing, the time of contact of prolong smoke and liquid film, thus remove flue dust, and after dedusting, drop falls into dust arrester bottom, from overfall, spill into circulating sedimentation tank, after sedimentation basin Ash Water Separator, continue again reuse.
Beneficial effect of the present invention is: collector for duster spray, venturi, impact, eddy flow, the dedusting of moisture film Pyatyi are in one, and dedustings at different levels organically combine and be auxiliary mutually, and efficiency of dust collection is high, installation is simple and maintenance cost is low.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure: 1, dedusting tower body 2, spray equipment 3, air inlet 4, Venturi turbulent flow system 5, impulse type water bath device 6, spiral board 7, moisture film device 8, air outlet 9, overfall 10, overflow pipe 11, access hole.
The specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described, a kind of multistage rotary dust collector: comprise dedusting tower body 1, spray equipment 2, Venturi turbulent flow system 4, impulse type water bath device 5, spiral board 6, moisture film device 7; The top of dedusting tower body 1 is air inlet 3; Venturi turbulent flow system 4 is vertically set on dedusting tower body 1 cavity central authorities, and spray equipment 2 is arranged on Venturi turbulent flow system 4 tops; The lower part outlet of Venturi turbulent flow system 4 is connected with impulse type water bath device 5; Upper end peripheral, impulse type water bath device 5, lower end in Venturi turbulent flow system 4 is provided with spiral board 6, is arranged with moisture film device 7 outside the top of Venturi turbulent flow system 4; Moisture film device 7 is connected with air outlet 8; Described spray equipment 2 comprises water pipe and a plurality of nozzle; Described impulse type water bath device 5 is provided with overflow pipe 10; Collapsible tube end or the trunnion place of described Venturi turbulent flow system 4 are provided with washing nozzle; The position of plane is provided with overfall 9 on slightly lower than moisture film device 7.
During work, gas is entered by air inlet, by Pyatyi dedusting, finally by air outlet gas up to standard out.

Claims (6)

1. a multistage rotary dust collector, is characterized in that: comprise dedusting tower body (1), spray equipment (2), Venturi turbulent flow system (4), impulse type water bath device (5), spiral board (6), moisture film device (7); The top of dedusting tower body (1) is air inlet (3); Venturi turbulent flow system (4) is vertically set on dedusting tower body (1) cavity central authorities, and spray equipment (2) is arranged on Venturi turbulent flow system (4) top; The lower part outlet of Venturi turbulent flow system (4) is connected with impulse type water bath device (5); Upper end peripheral, impulse type water bath device (5), lower end in Venturi turbulent flow system (4) is provided with spiral board (6), is arranged with moisture film device (7) outside the top of Venturi turbulent flow system (4); Moisture film device (7) is connected with air outlet (8).
2. a kind of multistage rotary dust collector according to claim 1, is characterized in that: described spray equipment (2) comprises water pipe and a plurality of nozzle.
3. a kind of multistage rotary dust collector according to claim 1, is characterized in that: described impulse type water bath device (5) is provided with overflow pipe (10).
4. a kind of multistage rotary dust collector according to claim 1, is characterized in that: collapsible tube end or trunnion place in Venturi turbulent flow system (4) are provided with washing nozzle.
5. a kind of multistage rotary dust collector according to claim 1, is characterized in that: slightly lower than moisture film device (7), be above provided with overfall (9) in the position of plane.
6. a kind of multistage rotary dust collector according to claim 1, is characterized in that: in the bottom of dedusting tower body (1), be provided with access hole (11).
CN201410084772.8A 2014-03-10 2014-03-10 A multistage deduster Pending CN104028068A (en)

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Application Number Priority Date Filing Date Title
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105251309A (en) * 2015-11-27 2016-01-20 江苏中立环保科技有限公司 Efficient energy-saving static dust and smoke remover and treatment method thereof
WO2016053190A1 (en) * 2014-09-30 2016-04-07 Keppel Offshore & Marine Technology Centre Pte Ltd Apparatus and method for treatment of exhaust gas
CN106582217A (en) * 2016-10-31 2017-04-26 武汉船用机械有限责任公司 Flue gas washing device and system suitable for crude oil carrier
CN112318388A (en) * 2020-10-19 2021-02-05 燕山大学 Water film dust removal device for treating dust generated by sand blasting machine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2203627Y (en) * 1994-07-01 1995-07-19 湘潭大学 Desulphurizing and dust exhausting double-function purifier for flue gas
CN2309880Y (en) * 1997-10-05 1999-03-10 高良玉 Desulfurizing dust remover
CN2751868Y (en) * 2004-12-10 2006-01-18 傅爱国 Venturi automatic air impingement atomization desulfurizing dust collector
CN101468274A (en) * 2007-12-28 2009-07-01 海斯博特(北京)科技有限公司 Wet dust separator
CN203764062U (en) * 2014-03-10 2014-08-13 江苏宝丽环保科技有限公司 Multi-stage dust remover

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2203627Y (en) * 1994-07-01 1995-07-19 湘潭大学 Desulphurizing and dust exhausting double-function purifier for flue gas
CN2309880Y (en) * 1997-10-05 1999-03-10 高良玉 Desulfurizing dust remover
CN2751868Y (en) * 2004-12-10 2006-01-18 傅爱国 Venturi automatic air impingement atomization desulfurizing dust collector
CN101468274A (en) * 2007-12-28 2009-07-01 海斯博特(北京)科技有限公司 Wet dust separator
CN203764062U (en) * 2014-03-10 2014-08-13 江苏宝丽环保科技有限公司 Multi-stage dust remover

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016053190A1 (en) * 2014-09-30 2016-04-07 Keppel Offshore & Marine Technology Centre Pte Ltd Apparatus and method for treatment of exhaust gas
US10137398B2 (en) 2014-09-30 2018-11-27 Keppel Offshore & Marine Technology Centre Pte Ltd Apparatus and method for treatment of exhaust gas
CN105251309A (en) * 2015-11-27 2016-01-20 江苏中立环保科技有限公司 Efficient energy-saving static dust and smoke remover and treatment method thereof
CN106582217A (en) * 2016-10-31 2017-04-26 武汉船用机械有限责任公司 Flue gas washing device and system suitable for crude oil carrier
CN106582217B (en) * 2016-10-31 2019-10-22 武汉船用机械有限责任公司 A kind of flue washing device and system suitable for crude oil carrier
CN112318388A (en) * 2020-10-19 2021-02-05 燕山大学 Water film dust removal device for treating dust generated by sand blasting machine

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Application publication date: 20140910