CN2269892Y

CN2269892Y - Small axial-flow type multi-pipe cyclone dust collector

Info

Publication number: CN2269892Y
Application number: CN 96241739
Authority: CN
Inventors: 刘幼林; 张秀萍
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-11-13
Filing date: 1996-11-13
Publication date: 1997-12-10
Anticipated expiration: 2006-11-13

Abstract

The utility model provides an axial-flow type multi-pipe cyclone dust collector of a novel structure, and is composed of a case, a cyclonic cylinder, a diversion ring and a core pipe. The cyclonic cylinder is arranged in the case, and the core pipe is inserted into the cyclonic cylinder. The upper side of the core pipe is provided with the diversion ring, and the diversion ring is provided with guide vanes. The utility model is characterized in that shape of the guide vanes is formed by that two parabola-approximate curves are taken as inside and outside edge lines for forming a limited paraboloidal shape, and the top of each vane is provided with a vertical air-stream guide panel. Owing to excellent fluid mechanics properties, the vanes of the paraboloidal shape make the axial-flow type multi-pipe cyclone realize low resistance and high efficiency. The utility model has the advantages of small size, light weight, small occupation of land, etc.

Description

Miniaturization axial-flow type multicyclone

The utility model has related to the boiler accessory machinery field, is particularly for a kind of miniaturization axial-flow type multicyclone.Be applicable to that various Industrial Boilers use, and also can be used for other kiln.

The multicyclone of using in the Industrial Boiler field mostly is tangential deduster at present, the air intake of its whirlwind is tangential (radially) air intake, this deduster serviceability is better, efficiency of dust collection is also higher, practical, but, influenced and promoted the use of because the volume of this deduster is big, consumptive material is many, floor space is big, economic indicator does not increase.Domestic in recent years for this reason beginning is to axial cyclone dust collectors research and development.At present, the domestic axial-flow type multicyclone of having developed with screw type guide vane and petal-shaped guide vane, this deduster volume is less, weight is lighter, floor space is little, yet because the institute of the sub-guide vane planform of whirlwind limit, causes the windage of deduster big, efficiency of dust collection is low, brings difficulty to axial-flow type deduster application.

It is little that the purpose of this utility model is to release a kind of windage, the efficiency of dust collection height, and in light weight, volume is little, and the multicyclone of the air inlet through hollow shaft of compact conformation is to improve the technical-economic index of deduster, the needs of the boiler dusting that better meets.

Specific tasks of the present utility model are to realize by designing a kind of new guide vane with outstanding hydrodynamic characteristic.

Concrete deduster is by casing, the whirlwind tube, and guide vane and core duct member are formed.Casing is a square metal shell, and up and down two parts are arranged, between connect by flange, the top of upper box is connected to blast pipe, the bottom of lower box is connected to a dust fall ash bucket, whole box body is to be fixed on the support.Be provided with dividing plate and location orifice plate in the case, casing is divided into purifying area (going up the district), dust-containing area (middle district) and dust fall district (inferior segment) three parts, on upper box, be provided with an air inlet, enter for ash-laden gas.The whirlwind tube is that a bottom is the cylindrical tube of cone, be contained in the dust fall district of casing by locating the orifice plate location up and down, in order to receive ash-laden gas, one core pipe is housed in the Whirlwind barrel, the top of core pipe is positioned at the dividing plate location in the upper box, insert in the whirlwind tube bottom of core pipe, on the cylindrical wall of core pipe a guide ring is housed, and guide vane is housed on the guide ring.In order to improve efficiency of dust collection, the lower end of the utility model core pipe is designed to cone-shaped, enters the core pipe with reverse eddy flow and influences efficiency of dust collection to prevent and to reduce behind the rotational flow dust-removing in the flue gas residual dust.Whirlwind tube in the utility model is according to the needs of smoke treatment amount, and can be two groups also can be many groups, can be contour arrangement in casing, also can be to be ladder to arrange.

In order to realize the efficient low-resistance of deduster, guide vane of the present utility model has designed the curve form of a kind of curved surface that is limited by inside and outside two approximate parabolical curves as guide vane, also adds a vertical air-flow guide plate in (upper end) all the time of every blade.Evidence adopts the guide vane smoke treatment of this approximate parabolic shape to flow, and has outstanding hydrodynamic characteristic.Quicken to become in the dynamic process of the swirling eddy that dust separation for the benefit of comes off at the flue gas stream that will axially enter the whirlwind tube with break-in, flue gas stream is in a kind of continuous, steady, rational rotating centrifugal state all the time, can to greatest extent dust in flue gas be separated to get rid of falling, and not increase windage.Whirlwind tube and guide ring in the utility model can be ironcasting, also can be ceramic post sintering spare.

During use, the air inlet of deduster is connected on the smoke discharging pipe of boiler, the ash-laden gas that enters enters in the whirlwind tube vertically, under the effect of guide ring guide vane, descend by last rotation, through cyclone centrifugal separation, dust in flue gas is got rid of to fall to isolating, along the distribution of successively decreasing of cylinder inboard wall ecto-entad, the dust that traps drops in the ash bucket through whirlwind tube bottom and to discharge.Flue gas after the dedusting reverse eddy flow that makes progress enters the purifying area of core pipe to top, is discharged by the blast pipe at top and enters flue gas desulfur device or air-introduced machine.

This reality and with novel because to have designed guide vane with approximate parabolic shape and adopted the bottom be the core pipe of cone structure, under the situation that does not increase windage, improved efficiency of dust collection, under the prerequisite of handling equal exhaust gas volumn, reduced the unit steel consumption, thereby the volume of having realized dust settler is little, in light weight, take up an area of less, advantage that efficient is high.

The concrete example of the utility model is provided by following accompanying drawing.Fig. 1 is a structural representation of the present utility model.Fig. 2 is the structural representation of the utility model guide ring.Fig. 3 is the vertical view of Fig. 2.Fig. 4 is the expanded view of the utility model guide vane inward flange.Fig. 5 is the outer peripheral expanded view of the utility model guide vane.

Among the figure, (1) is support, and (2) are lower box, and (3) are following location-plate, (4) be the whirlwind tube, (5) are last location-plate, and (6) are air inlet, (7) be upper box, (8) are blast pipe, and (9) are dividing plate, (10) be the core pipe, (11) are guide ring, and (12) are bullet, (13) be the voltage stabilizing plate, (14) are ash bucket, and (15) are guide vane, (16) be guide plate, (17) are blade inward flange evolute, and (18) are blade outward flange evolute.

Below in conjunction with accompanying drawing the utility model is done description.

As Fig. 1-5, deduster is to be made of casing, whirlwind tube, guide ring and core pipe.Casing is made up of upper box (7) and lower box (2) two parts, the top of casing is connected to blast pipe (8), the bottom of casing is connected to an ash bucket (14), whirlwind tube (4) is that a bottom is the cylinder of cone, be contained in location orifice plate (5) and (3) location of being arranged in the lower box (2) in the casing, the whirlwind tube can have many groups, is contour and is discharged to or the ladder arrangement in casing; Core pipe (10) is contained in the whirlwind tube, its top is inserted in the upper box (7) and is located by dividing plate (9), insert in the whirlwind tube bottom, there is one section bullet (12) lower end of core pipe, on the core pipe, be set with guide ring (11), 6 guide vanes (15) are housed on the guide ring, a vertical air-flow guide plate (16) is arranged on the top (top) of every guide vane.The paraboloidal that outer edge limits is made in being shaped as by two approximate parabolical curves of guide vane.Wherein the inward flange evolute (17) of blade in the horizontal direction the length on (guide ring radially) be

(D ₁Be the guide ring internal diameter), length (highly) on vertical direction (guide ring is axial) is the height H of guide ring, the air stream outlet angle of blade inward flange (angle of inward flange evolute end (right-hand member) and horizontal direction) α is 10 °-20 °, inlet angle (angle of the top of inward flange evolute (left end) and vertical direction) is 0 °, and inward flange evolute (17) is in correspondence Slope on each Along ent of length is that (α is the angle of outlet to α+n β in the formula, β=5 °～15 °, n=0,1,2,3 ...).Blade outward flange evolute (18) length in the horizontal direction is (D ₂Be the guide ring external diameter), the height of in the vertical direction is H, the import of blade outer edge line is wrestled 0 °, the angle of outlet of blade outer edge line and the trend of curve (slope) are made indirectly by the parameter of fixed inward flange line (17), promptly be according to the outer edge line correspondence separately the contour principle of distance on each Along ent of cross-directional length determine the outer peripheral evolute of blade.

Sit device according to removing of manufacturing of this example, volume is little, in light weight, take up an area of few, and high-efficiency low-resistance, its running resistance is less than 1000Pa, efficiency of dust collection can reach more than 95%.

Claims

1, a kind of multicyclone of forming by casing, whirlwind tube, guide ring and blade.The top of casing is connected to blast pipe (8), one ash bucket (14) is arranged at the bottom of casing, whirlwind tube (4) is the tapered cylinder in a bottom, be contained in the casing, by the location orifice plate (5) that is located at casing and (3) location, the whirlwind tube can have many groups, being contour arrangement or ladder in casing arranges, core pipe (10) is contained in the whirlwind tube, its top is positioned at a dividing plate (9) location on casing top, and insert in the whirlwind tube bottom, and guide ring (11) is housed on the core pipe, six guide vanes (15) are housed on the guide ring, it is characterized in that:

The paraboloidal that the outer edge line is limited is made in being shaped as by two approximate parabolical curves of A, guide vane (15), wherein blade inward flange evolute (17) in the horizontal direction the length on (guide ring radially) be (D ₁Internal diameter for guide ring), length (highly) on vertical direction (water conservancy diversion annulate shaft) is H (H is the height of guide ring), the air stream outlet angle of blade inward flange (angle of inward flange evolute end (right-hand member) and horizontal direction) α is 10-20 °, inlet angle (angle of inward flange evolute top (left end) and vertical direction) is 0 °, and blade inward flange evolute (17) is in correspondence Slope on each Along ent of length is that (α is the angle of outlet to α+n β, β=5 °～15 °, n=0,1,2,3 ...), blade outward flange evolute (18) length in the horizontal direction is

(D ₂External diameter for guide ring), the height of in the vertical direction is long to be H, the outer peripheral inlet angle of blade is 0 °, the trend (slope) of the outer peripheral angle of outlet of blade and curve is that the parameter by fixed inward flange evolute (17) provides indirectly, promptly be according to the outer edge line correspondence separately the contour principle of distance on each Along ent of cross-directional length determine the outer peripheral evolute of blade

B, a vertical air-flow guide plate (16) is arranged at the top (top) of each guide vane (15),

C, one section bullet (12) is arranged in the lower end of core pipe (10).

2, deduster as claimed in claim 1 is characterized in that said whirlwind tube (4) and guide vane (15) can be ironcastings, also can be ceramic post sintering spare.