CN2294786Y

CN2294786Y - Two-stage whild-wind separator

Info

Publication number: CN2294786Y
Application number: CN 96242436
Authority: CN
Inventors: 董鸿聚
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-10-25
Filing date: 1996-10-25
Publication date: 1998-10-21
Anticipated expiration: 2006-10-25

Abstract

The utility model discloses a double cyclone which is composed of a first level volute casing 1, a second level volute casing 7, a public core tube 10 and a dome 11, wherein the public core tube 10 is positioned at the center; the second level volute casing 7 is sheathed at the external side of the lower part of the public core tube; the dome is sheathed at the external side of the public core tube, and is buckled on the upper part of the second level volute casing; the first level volute casing is sheathed at the external side of the upper part of the public core tube, and simultaneously the lower part of the first level volute casing is also sheathed at the external side of the upper part of the second level volute casing. The utility model has a two-level separation function; the dedusting efficiency is obviously raised, and the resistance is small. The utility model is suitable for assembling multiclones with various specifications, and can be used for the dry dust removal of boiler flue gas or other gas with non-cohesive powder dust.

Description

Double cyclone

The utility model relates to a kind of double cyclone, belongs to the dry collector technical field, can be used for being combined into the multi-tube dust cleaner of different size.

" multi-tube dust cleaner " counted in existing most effective the working as of dry-type centrifugal (whirlwind) deduster that is used for the boiler smoke dedusting, it is made up of the cyclone separator of the cast iron of several diameters less (general 300-400mm), and the relation of utilizing its separative efficiency and deduster diameter to be inversely proportional to obtains higher efficiency of dust collection (about 90%).But for general boiler, this kind deduster is difficult to reach the dust emission standard in one or two class areas, though two duster parallels can be formed two-stage dust removal to obtain higher efficiency of dust collection, but because this kind dust remover resistance big (about 900Pa), series connection back resistance doubles, cause the increase of air-introduced machine specification and improve the power consumption of air-introduced machine greatly, make the raising by a relatively large margin of initial cost, operating cost and floor space.

The purpose of this utility model is: a kind of double cyclone that can constitute novel multi-tube dust cleaner is provided, a multi-tube dust cleaner of forming by this double cyclone, compare with the multi-tube dust cleaner of prior art, though only have quite resistance and the operating cost (air-introduced machine power consumption) of (or slightly high) Yu Yitai, be equivalent to one floor space and construction investment, a little more than one manufacturing cost, but has total efficiency of dust collection of two series connection.

The purpose of this utility model reaches by the following technical programs, this double cyclone, and by public core pipe 10, one-level spiral case 1, two spiral case 7 constitutes, and its special character is, public core pipe 10 and one-level spiral case 1, secondary spiral case 7 is concentricity.

The first half of public core pipe 10 and one-level spiral case 1 with the no bottom cone of tangential one-level smoke inlet 2 constitute the first order separate from, the footpath is placed in outside the shell of secondary spiral case 7 first half branches greater than footpath outside the secondary spiral case 7 within cylindrical shell the latter half of one-level spiral case 1, and its gap is as one-level dust export 6.

Secondary spiral case 7 by the latter half of public core pipe 10 and band cone constitutes second level centrifugation, and its secondary smoke inlet 4 absorbs the first order of hanging oneself after separating than clean flue gas.

At secondary smoke 4 places that enter the mouth, in order to reduce influence to first order centrifugation campaign, kuppe 11 is set, with make it to collect be positioned at pressing close to of pivot public core pipe 10 places than clean flue gas, simultaneously, kuppe is provided with the flow deflector consistent with direction of rotation, makes the flue gas after one-level is separated change its direction of rotation hardly and import second level separation smoothly.

Because the utility model has been taked abovementioned technology, rotation at a high speed in the one-level cyclone chamber 3 that between one-level spiral case 1 and public core pipe 10, forms after ash-laden gas is entered from one-level smoke inlet 2, dust is thrown toward one-level spiral case 1 under action of centrifugal force inwall and rotation drop to one-level ash hole 6, be collected discharge afterwards, this process is equivalent to the cyclone separator of a single-stage, and public core pipe 10 outer walls after centrifugation around be not to enter public core pipe 10 than clean flue gas, but import in the secondary spiral cases 7 by being arranged in public core pipe 10 kuppe 11 on every side, in kuppe 11, still certain centrifugation is also arranged for rotatablely moving than clean flue gas, this centrifugation can be considered the part that secondary separates, and separates very favourable to the second level that enters in the secondary spiral case 7.

Enter after the secondary spiral case 7 than clean flue gas, rotation at a high speed in secondary cyclone chamber 5, carry out further centrifugation, still non-separating dust is thrown toward the inwall of secondary spiral case 7 under action of centrifugal force in the one-level separation process, rotation is sunk, discharge from secondary ash hole 8, and the clean flue gas that separates through secondary after entering public core pipe 10, the pivot of secondary cyclone chamber 5 is drained from exhanst gas outlet 9.Because after the first order is separated in the flue gas dust contain 10% of the original content of quantity not sufficient, the concentration of dust is very low, avoided interfering with each other, help to separate and carry out more up hill and dale, therefore, ash-laden gas enters this double cyclone, is actually to have carried out the secondary separation, also just has the total efficiency of dust collection that is equivalent to two single stage cyclone separator series connection.

The one-level smoke inlet 2 of the one-level spiral case 1 of the utility model is a gradually-reducing shape, helps to alleviate the inlet resistance, and under the effect of kuppe, flue gas enters the second level by the first order, does not change than general orientation, and its flow process also only is equivalent to the flow process of single-stage separator.Therefore, only have quite or a little more than the resistance of a single-stage separator.

The utility model is equally applicable to contain the not dedusting of the gas of sticky dust.

Description of drawings:

The vertical view of an embodiment of Fig. 1-the utility model;

The A of Fig. 2-Fig. 1 is to view;

The A-A profile of Fig. 3-Fig. 1;

The vertical view of Fig. 4-one-level spiral case 1;

The B of Fig. 5-one-level spiral case 1 is to view;

The A-A profile of Fig. 6-Fig. 5;

The vertical view of Fig. 7-public core pipe 10;

The A of Fig. 8-Fig. 7 is to view;

The vertical view of Fig. 9-secondary spiral case 7;

The A of Figure 10-Fig. 9 is to view;

The vertical view of Figure 11-kuppe 11;

The A of Figure 12-Figure 11 is to view;

The B of Figure 13-Figure 11 is to view;

The vertical view of Figure 14-the utility model-individual assembling mode embodiment;

The A-A profile of Figure 15-Figure 14.

Among the figure: 1. one-level spiral case, 2. one-level smoke inlet, 3. one-level cyclone chamber, 4. secondary smoke inlet, 5. secondary cyclone chamber, 6. one-level dust export, 7. secondary spiral case, 8. secondary dust export, 9. exhanst gas outlet, 10. plate, 15. base plates, 17. one-level dust delivery lines, 18. secondary dust flue-dust retainers, 19. secondary dust general exports, 20. total exhanst gas outlets in public core pipe, 11. kuppes, 12. upper plates, the 13. total gas approach, 14.

Provide embodiment of the present utility model below in conjunction with accompanying drawing, be used to further specify the present technique solution.

The first half of one-level spiral case 1 of the present utility model is a cylindrical shell, top at cylindrical shell, be provided with tangential one-level smoke inlet 2, for horn-like, this helps to alleviate the resistance of gas flow, the outside of one-level smoke inlet 2 is drawn close to the center of cylindrical shell gradually along the gas direction of rotation, when rotating to for 3/4ths weeks (or a week), contract to directly same with cylinder, at its top one circular hole is arranged, its center of circle is on the center line of this cylindrical shell, the diameter in this hole is identical with the external diameter of public core pipe 10, is used for public core pipe and from then on passes, and there is short divergent segment middle and lower part of cylinder, the bottom barrel diameter of divergent segment is greater than the diameter of divergent segment top cylindrical shell, but center line does not become.The bottom of cylindrical shell is provided with flange, is used for fixing and seals one-level spiral case (referring to Fig. 4, Fig. 5, Fig. 6).

Be circular cylinder body on the secondary spiral case 7 of the utility model, the bottom is a cone, end is helical form on the cylindrical wall, as Figure 10, from A point one week of spiral of cylinder dropping to the B point, the upper wall of secondary spiral case 7 is that the spiral line end along barrel shrinks to central horizontal, be contracted to the exterior radius that equals public core pipe 10 apart from the distance of vertical center line, just when overlooking, it is a circular hole (as Fig. 9), this hole just in time can make public core pipe 10 pass, and on the edge of the upper wall inner vortex of secondary spiral case 7, opens 5 small sircle holes (or slotted eye) and is used for fixing with the helical form flange of public core pipe 10 middle and lower parts and sealing, in the cone bottom secondary ash hole 8 is set, outer ring at secondary ash hole 8 is provided with flange, is used for the fixing and sealing of secondary spiral case 7.

Public core pipe 10 is cylinder, in the middle on the lower side, is provided with spiral helicine flange, and inner vortex is consistent on the shape of this flange, size, aperture and hole count and the secondary spiral case 7, is used for both and closely is combined together (seeing Fig. 7, Fig. 8).

The lower end of the barrel of the outer wall bottom of kuppe 11 also is a helical form, and this end face overlaps fully with the outer wall upper surface of secondary spiral case 7.And the upper end of a kuppe cylinder ancient piece of jade, round, flat and with a hole in its centre tapers to less round mouth, absorbs needs than clean flue gas to adapt to press close to an ancient piece of jade, round, flat and with a hole in its centre outside the public core pipe 10.In less round mouth, some flow deflectors of complying with the inclination of direction of rotation are set, the upper end of this sheet and less round mouth maintain an equal level, the intersection of lower end and converging transition and cylinder maintains an equal level, the interior ancient piece of jade, round, flat and with a hole in its centre of outer end and converging transition is connected as a single entity, the distance of interior end line each point and vertical center line equals the exterior radius of public core pipe 10, so that do not need fixing separately after the assembling.

Form four parts such as one-level spiral case 1 of the present utility model, secondary spiral case 7, public core pipe 10 and kuppe 11 and be advisable, equally also can adopt steel, when adopting ceramic, should do suitable reinforcement at flange and cone place to adopt iron casting.

Above-mentioned four parts are to fit in a double cyclone like this, the at first fixing flange in the bottom of secondary spiral case 7, make secondary spiral case 7 standing upright, again public core pipe 10 is inserted from the top of secondary spiral case 7, the helical flange of public core pipe 10 cooperate with the top inner vortex of secondary spiral case 7 and fill in asbestos cord after use bolted, kuppe 11 is inserted in from the top of public core pipe, makes it closely to overlap, but need not fix with secondary spiral case 7 tops.Again the one-level spiral case also is inserted in from the top of public core pipe 10, behind the appropriate location, fixes (this place only states its relative position, is used to describe operation principle).

Its operation principle is, under the effect of (disposing in addition) air-introduced machine, ash-laden gas is imported by the flaring one-level flue gas mouth 2 of this double cyclone, under bell-mouthed convergent effect, the air-flow speedup, to enter one-level spiral case 1 and to carry out the high speed rotation status at a high speed, this tangential import, make gas enter the rotation of internal gas flow, rotatablely moving of inside do not produced destruction, help to alleviate resistance and improve separative efficiency, rotate at a high speed along public core pipe 10 limits in the one-level cyclone chamber 3 of ash-laden gas between one-level spiral case 1 inwall and public core pipe 10 outer walls, the limit moves downward, make the dust in the flue gas under action of centrifugal force, be thrown toward one-level spiral case 1 inwall, under the effect of the impulsive force of air-flow and self gravitation, sink along the inwall of one-level spiral case 1, until discharging from one-level ash hole 6 (that is the slit between one-level spiral case 1 inwall and secondary spiral case 7 outer walls).And be positioned at pivot, just press close to wall place outside the public core pipe 10, through one-level separate than clean flue gas, diversed cover imports secondary spiral case 7.

The effect of kuppe 11 is to change hardly the direction of rotation of flue gas, and be evenly absorbed in press close in the one-level spiral case 1 public core tube wall than clean flue gas, minimizing is to the influence that rotatablely moves in the one-level spiral case 1, this helps to improve the one-level separative efficiency and separates the resistance of giving vent to anger with the minimizing one-level, and for secondary spiral case 7, because the air-flow in the kuppe 11 is rotatablely moving for rule still, its is move the gradient of dust concentration of flue gas on every side (promptly under action of centrifugal force along public core pipe 10 one-level spiral case 1 in, it is more little to press close to the pivot dust concentration more, and more away from pivot, the phenomenon that dust concentration is big more) successfully imports secondary spiral case 7 and in kuppe, increased this gradient, therefore, kuppe has the effect that reduces secondary volute inlet resistance and improve the secondary separative efficiency.

Enter secondary spiral case 7 than clean flue gas and proceed high speed rotary motion, the flue gas that has had certain dust concentration gradient, in rotation, continue to increase this gradient, still non-separating dust in one-level is separated is got rid of to secondary spiral case 7 inwalls, discharge along sliding to secondary ash hole 8 under the inwall rotation, the clean flue gas that is positioned at pivot that separates through secondary is imported public core pipe 10 from exhanst gas outlet 9 discharges by the bottom from public core pipe 10.

Utilize the double cyclone of the utility model to be assembled into the example of deduster one of description below, be used to describe assembling mode of the present utility model.

In order to obtain high efficiency, size of the present utility model particularly diameter generally should do very little, should not use separately, but determine that according to the flow of processing ash-laden gas the number of this double cyclone combines, the structural principle of the utility model and the cyclone separator of prior art have the difference of essence, so its assemble method is also different, originally sentence 16 dual stage cyclone discrete group and are integrated and are example, (in actual the use, any amount assembling all can) be to show the mode of bright its assembling.

16 double cyclones of splendid attire be that top is that square, bottom is the container body of steel plate of taper, be provided with three layers of horizontal baffle in it, ground floor, be located at square and junction taper, be called base plate 15, the second layer is located at the middle part of square box, plate 14 in being called, the 3rd layer of portion on the upper side that is located at square box is called upper plate 12.Respectively establish 16 circular holes on the base plate 15 of upper plate 12, middle plate 14, hole on three layers of dividing plate is corresponding and three corresponding holes are concentric, but aperture difference, the footpath is identical outside the public core pipe 10 of the aperture of upper plate 12 and double cyclone, be used to make public core pipe 10 from then on to pass, upper plate 12 plays the buffer action of ash-laden gas and clean flue gas simultaneously; The aperture of middle plate 14 is identical with the bottom internal diameter of the one-level spiral case of double cyclone, make crack between the outer wall of circular hole edge and secondary spiral case 7 be used for the outlet of one-level dust-separating, middle plate 14 each circular also have 4 apertures, be used to wear the flange in the bottom of bolting one-level spiral case 1, therefore, plate 14 supports one-level spiral case 1 in addition and isolates ash-laden gas and the effect of the dust that one-level separates in this; The aperture of base plate 15 is identical with the aperture of the secondary ash hole 8 of secondary spiral case 7 bottoms, around its hole 4 apertures is arranged also, is used to wear the flange of bolting secondary spiral case 7 bottoms.Therefore, this base plate 15 supports secondary spiral case 7 and the effect of isolating the dust that dust that one-level separates separates with secondary in addition, simultaneously, at base plate 15, also have 4 square holes (circular hole also can), make funnel, be called one-level dust funnel 16, in the bottom of funnel, connect conduit and be called one-level dust delivery line 17, being used for that the dust that one-level is separated is passed secondary dust flue-dust retainer 18 derives.

On the top of square box, also be between case top and the upper plate 12, flue gas general export 20 is set, be used for being connected with air-introduced machine, establishing total gas approach 13 between middle plate 14 and the upper plate 12 and near on the tank wall at upper plate 12 places, be used for being connected with the exhanst gas outlet of boiler.

During use, the ash-laden gas of boiler from total gas approach 13 enter square box upper plate 12 and between the plate 14, because the sealing of upper plate 12 and middle plate 14 is arranged, ash-laden gas is assigned to 16 double cyclones equably and is separated (separation principle of separator is referring to the description of the relevant double cyclone in front), clean flue gas is taken away by air-introduced machine after total exhanst gas outlet 20 after the spatial concentration between 16 public core pipes importing square box top boards and the upper plate 12, the one-level dust-separating of each double cyclone therefrom falls in shared circular hole of each separator and the slit between the secondary spiral case 7 on the plate 14 in the space between base plate 15 and the plate 14, derive by the one-level dust funnel 16 and the one-level dust delivery line 17 that are arranged on the base plate, and the dust that secondary separates spills from the secondary ash hole 8 of secondary spiral case 7, the circular hole that passes base plate 15 falls into two dust flue-dust retainers, 18 backs of taper by 19 derivation of secondary dust general export, because secondary dust flue-dust retainer 18, all there is bigger capacity in space between base plate 15 and the middle plate 14, can intermittent ash discharge, also can on one-level dust delivery line 17 and secondary dust general export 19, tie up the canvas pocket and carry out continuity and import pocket.Because the double cyclone of the manner assembling is parallel running, its total efficiency of separation is identical with the single separative efficiency of double cyclone.

Claims

1, double cyclone, it is made up of public core pipe (10), one-level spiral case (1), secondary spiral case (7), the central lines that it is characterized in that public core pipe (10), one-level spiral case (1) and secondary spiral case (7) makes it internal diameter greater than the external diameter of secondary spiral case (7) and be placed in outside secondary spiral case (7) upper case with its cylindrical shell the latter half enlarged diameter of one-level spiral case (1) of tangential one-level smoke inlet (2).

2, by the described double cyclone of claim 1, it is characterized in that on the top of secondary spiral case (7), be surrounded on public core pipe (10) kuppe (11) is set.