Current, the countries in the world air pollution is serious day by day, and wherein burning boiler and Industrial Stoves are one of primary pollution source.The dust removal with machine device category that known these type of pollution sources of control are adopted is various, its dust-cleaning principle is by gravity, inertia force, centrifugal force, collision, adhesion and aggregation, moisture film and material filtering etc. the dust in the flue gas to be separated from gas, reaches the purpose of purifying exhaust air.The most of operation principles of these equipment are single, gas flow during dedusting, equipment and part stationary are motionless, fail above-mentioned principle is comprehensively used, thereby its complex structure, the consumption steel are many, volume is big, floor space is big, cost is high, inconvenient maintenance, efficiency of dust collection are low.Cause reentrainment of dust, contaminated environment during the dust discharge of dry dust removal method; Spray and water curtain dedusting hourly water consumption are big, and environment distributes a large amount of water droplets, water smoke towards periphery again.As the need desulfurization, use independent desulphurization system again, desulfurization in the lump, and the difficult regulation and control of dust-removal and desulfurizing efficient.
The objective of the invention is to overcome above-mentioned shortcoming, provide a kind of simple in structure, the consumption steel are few, floor space is little, cheap, easy to maintenance, water consumption is few, free from environmental pollution, dust arrester that efficiency of dust collection is high.
Another object of the present invention provides a kind of dedusting and desulfurization integrated dust arrester.
The technical solution that realizes the object of the invention is as follows:
A kind of dust arrester, comprise a housing that ash bucket is housed that links to each other with fume ducts and at least one impeller that is supported in the housing, described impeller links to each other with drive unit by power transmission shaft, is being provided with the water injector that links to each other with separating liquid near at least one side of impeller.
Dust arrester of the present invention is simple in structure, volume is little, cheap, easy to maintenance, water consumption is few, do not produce reentrainment of dust, efficiency of dust collection can reach more than 97%.As in separating liquid, adding sulfur adsorbent, also can remove the SO in the flue dust simultaneously
2, desulfuration efficiency is adjustable.
Other details of dust arrester of the present invention and advantage can understand by reading the embodiment hereinafter encyclopaedize in conjunction with the accompanying drawings, wherein:
With reference to Fig. 1.Dust arrester shown in the figure is a horizontal positioned.Make in the middle of in the housing 5 of dust arrester with the impeller outer toroidal adapt dolioform, its two ends are provided with ring flange 9, one ends and link to each other by the fume ducts 11a of bend pipe 10 with the flue dust inlet, the other end links to each other with flue gas after being purified pipeline 11b.Ash bucket 7 is equipped with in the bottom of housing 5, and valve 8 is housed under the ash bucket.In order to be easy to discharge dust, the angle of ash bucket and duct wall is greater than 60 °, so that the grit of cohesion flows into ash bucket.Impeller 3 is housed in housing 5, and bearing bracket stand 4(sees Fig. 7), the two ends of the power transmission shaft 2 of impeller 3 are supported on bearing bracket stand 4 respectively and are contained on the sealed bearing 6 on the bend pipe 10.Power transmission shaft 2 can link to each other with motor 1 and dragged by it by shaft coupling.Also can pass through belt, gear etc. link to each other with motor or other prime mover.Bearing bracket stand 4 can be made into shape shown in Figure 7, connect with several spokes between bearing block 41 and the outer shroud 42, so that the flue gas that purifies is discharged from the space between the spoke, outer shroud 42 can be used universal mode, and for example bolt or the welding with the wall that penetrates housing 5 is fixed in the housing 5.
For easy to disassembly and maintenance, housing 5 can be made the two halves of separating vertically, middle being tightly connected with flange is integral.
Impeller 3 can be made into various ways.Impeller side shown in Fig. 2-4 is a planar shaped.The oblique grid 33 of metal on the outer mask of impeller framework 32 of blade 31 is housed.The angle of blade 31 is bigger, so as when rotation the resistance that forms when the thrust gas that produces rotate greater than self, increase flow of flue gas pressure can also replace air-introduced machine.The purpose of metal grill 33 is to be easy to form moisture film when water is sprayed on the impeller 3 on the cover, tiltedly the grid grit of being convenient to make cohesion with the rotation of impeller 3 tangentially direction dish out.Self-evident, metal grill also can be made into straight grid.
With reference to Fig. 5 and Fig. 6.Shown in Fig. 5-6 is the impeller of the another kind of form of dust arrester use of the present invention, this does not have blade above impeller, the arc spoke 34 of some outer ends to the bending of impeller mid-plane is equipped with in both sides on wheel hub 35, fuse with some annulus 36 between the both sides spoke 34.This blade wheel structure is simple, is easy to make.Spoke 34 is convenient to have the liquid that condenses grit and is moved to cylindrical in the middle of impeller as camber, dished out at last, and grit is fallen in the ash bucket 7.Those of ordinary skill in the art is understood that, impeller can also be made various ways, make arc form, plane to the bending of the impeller mid-plane formula that combines with arc as straight spoke type, impeller two sides shape, blade also can be made into prismatic blade, needs this moment to use existing air-introduced machine in the front of dust arrester of the present invention.
With reference to Fig. 1 and Fig. 8.Water injector is equipped with in both sides at impeller 3.Water injector shown in the figure is one simple, and the ring pipe 13 of spray orifice 12 is arranged on it, and ring pipe 13 links to each other with straight tube 14 through valve 18.Straight tube 14 communicates with water source and sulfur adsorbent fluid box 17 from the beginning respectively through injector 15, at injector 15 with valve 18 is housed between the water source from the beginning, on the pipeline 16 between sulfur adsorbent fluid box 17 and the injector 15 valve 18 is housed also.Ring pipe 13 can be according to the size of impeller diameter, in a side or two sides the annular spray pipe of or two or more different-diameters is set respectively, so that make moisture film be covered with whole impeller surface.Also shower nozzle or nozzle can be installed on the ring pipe.Also can adopt some other mode to spray water,, on axle, hole and spray water to impeller surface near the impeller place as axle 2 is made hollow shaft.
During use, flange 9 and fume ducts 11a are passed through in the two ends of dust arrester of the present invention, 11b links to each other.Start motor 1 and open running water valve 18 simultaneously, make water spray to impeller surface from the spray orifice 12 of ring pipe 13.Motor 1 is by power transmission shaft 2 impeller 3 rotations at a high speed, and the collision of quickening the grit in the flue gas in the pipeline is gathered and produced the grit that powerful centrifugal force will gather and throws to pipeline dirt road, and grit falls into ash bucket 7 in the effect of gravity and inertia force.Simultaneously, water is under the centrifugal action that impeller rotates at a high speed, form moisture film in impeller surface, when flue-gas temperature was higher than 100 ℃, water section was vaporized, and produced the steam mist around impeller, grit is played filtration, barrier effect, and increase adhering to and weight, the collision of having quickened micronic dust particle gather and the separating of centrifugal force.Dust in ash bucket 7 gathers to a certain degree can open valve 8 discharges.
After tested, utilize dust arrester dedusting of the present invention, use one-level impeller efficiency of dust collection can reach 97%.As require efficiency of dust collection better, and can be connected in series secondary or three grades or multi-stage impeller in one-level impeller back in the same way and dispose corresponding water injector and get final product, efficiency of dust collection is decided by impeller rotation, sum of series injection flow rate size.As the need desulfurization, certain density sulfur adsorbent solution can be added, in sulfur adsorbent liquor box 17 as aqua calcis, ammonia salting liquids etc. are opened valve 18 to make sulfur adsorbent solution through pipeline 16, and injector 15 and running water are together through pipeline 14, ring pipe 13 is by spray orifice 12 ejections.Utilize impeller to rotate at a high speed, for example the water smoke that produces with the moisture film of 800~1500 rev/mins of generations and sulfur adsorbent solution makes the SO in the flue gas
2With the sulfur adsorbent haptoreaction, product is dished out with grit under action of centrifugal force.Recycle SO as need
2, can adopt multi-stage impeller, and be divided into dedusting, desulfurization two parts carry out respectively, water injection system with spray the sulfur adsorbent solution system and separate.In order to guarantee SO
2With sulfur adsorbent there is the enough haptoreaction time, improves desulfuration efficiency, can also on bend pipe 10, increase the aqueous solution that once spray contains sulfur adsorbent, so that increase SO
2With the time of contact of sulfur adsorbent.Desulfuration efficiency is by the sulfur adsorbent kind of selecting and impeller progression and the decision of haptoreaction time.
Dust arrester of the present invention has fully utilized principles such as gravity, inertia force, centrifugal force, collision, adhesion and aggregation, moisture film and filtration, the efficiency of dust collection height can be directly installed in the fume pipe, and volume is little, take up an area of less, dust-removal and desulfurizing can be incorporated into one, simple in structure, cheap.Its housing can be taken apart from the centre when parts damages or efficiency of dust collection reduce, be taken out part replacement or maintenance.Use dust arrester of the present invention not have reentrainment of dust, free from environmental pollution, save a large amount of waters, also can replace air-introduced machine, dust-removal and desulfurizing efficient is adjustable.Can be used for boiler, kiln dedusting, desulfurization and blast dedusting etc.