CN2438519Y - Rotor wicker basket circulating air powder separator - Google Patents

Abstract

The utility model relates to an improvement of powder selecting machines in mill industry. In the improved design structure, a powder selecting machine which combines a wicker basket-shaped rotary powder selecting device and a cyclone-shaped fine powder collector is adopted, and a closed circulating air type closed system is formed by that an air path in the device is connected with a blower in series by an external air inducing pipeline and an air conveying pipeline. A high efficiency fine powder selecting device which can control the granularity of fine powder is formed by improving a current divider and a material spreading disk furthermore.

Description

Spiral shell basket rotor hot air circulation type powder concentrator

The utility model belongs to a kind of solid separating device, and the particularly suitable pulverulent solids is surmised the operation occasion of classification, for example in the coal dust sorting manufacturing process and in the cement classification treating apparatus.

Sorting is an operation common in the mill industry behind the abrasive material.Particularly be applied in the classification and the recovery of power plant's coal dust sorting, cement plant cement material.The separation of various superfine powders and sorting are very common a kind of treatment process, and the separation of fine powder and collecting effect are exactly crucial index in this type of device certainly.After the abrasive material operation, fine powder is with meal and mixes shape, and mixed material takes out qualified fine powder through the processing of powder concentrator, again meal is returned material grinder.So qualified fine powder screening rate is high more to indicate that then this type of device is just advanced more, practical.Device commonly used in traditional sorting powder operation is the multistage combination of swinging powder selector and the sub-sorter of whirlwind.Swinging sorter treating capacity is bigger, but the fine powder rate of recovery is low, the fine powder rate of recovery height of the sub-sorter of whirlwind, but treating capacity is little, and, separate the coarse fodder ability to the having relatively high expectations of compound.The blanking mechanism that is adopted in the swinging sorter is also unreasonable, causes the entire process system effectiveness not high.In addition, because feeding and collection all need air force, so often retain a considerable amount of fine powders in the tail gas, its recovery problem always is complex treatment processization and the big basic reason of energy consumption.So the improvement of powder concentrator has at present become very urgent problem.

The purpose of this utility model provides the design of a kind of spiral shell basket rotor hot air circulation type powder concentrator new construction, makes it not only can greatly improve the efficient that fine powder reclaims, and can effectively reduce the loss of fine powder, effectively protects environment, and does not increase energy consumption.Can realize design object efficient, low energy consumption.

Basic design of the present utility model is the rate of recovery that improves qualified fine powder, and fine powder few the feeding back in the grinding step of trying one's best gone.Less or substantially eliminate the air flow losses of fine powder with emptying as far as possible.For realizing this technique effect, at first consider in this device design swinging spiral shell basket separator and the careful powder gatherer of whirlwind are carried out the composite structure design, it is rationally fitted together and and fall accordingly powder storehouse, guide duct and volume control damper door reasonably constitute a compactness, complete duplex efficiently.Specially treated in its design promptly is that the last air inlet with swinging spiral shell basket sorter windward air outlet and whirlwind minor fine powder collector tangentially is cascaded, both following air inlets and last air outlet are cascaded by peripheral hardware pipeline and air blast, thereby form the circulated air structure of a working air current inner sealing formula.Make working air current reduce emptying to greatest extent, make fine powder increase the probability that is sub-elected, thereby can improve the rate of recovery and protection environment effectively fine powder.On the basis of above structure, further improve design, can more effectively strengthen the chance of fine powder sorting, make the design realize its goal of the invention sorting mechanism.

How further specify the purpose of this utility model below in conjunction with accompanying drawing realizes:

Fig. 1 is each locations of structures schematic diagram of the utility model.

Fig. 2 is the structural representation of the utility model main part.

Wherein 1 represent the careful powder gatherer of whirlwind, 1A is 1 ajutage, and 1B is 1 air-vent, 2 is total induced duct, and 3 is feed pipe, and 4 is total ajutage, 5,7 is automatic regulating valve, and 6 is air blast, and 8 is swinging spiral shell small basket sorter, 9 is observation window, 10,11,12 is the fine fodder door, and 15 are the air-supply bifurcated pipe, 14 is the fine powder chamber, and 15 is loading hopper, and 17 is current divider, 17A is vertical rib, and 18 is observation window, and 19 is tripper, 20 is air outlet, and 21 is drive shaft, and 22 is spiral shell basket rotor, 23 remove charging tray for screw, 24 is drive unit, and 25 are the meal powder storehouse that falls, and 26 are the fine powder powder storehouse that falls, 27,28 is powder outlet, L1, L2 is γ-level sensor.

Except position and connecting mode having been carried out improve, emphasis has been done significant improvement to spiral shell basket rotator type sorter 8 wherein to the utility model on agent structure.Sorter after the improvement is by three sections cylinder blankets and the stacked annular current divider 17 that is located at hypomere, and the spiral shell basket rotor tripper 19 in the stage casing is formed.Air inlet 20 is arranged on the housing of hypomere and directly links to each other with the ajutage of air blast 6, what the epimere shell was formed is the fine powder chamber 14 of sorter, the air outlet that design tangentially has quantity and the sub-powder collector 1 of whirlwind to be complementary on its shell, this air outlet communicates with whirlwind receipts group device 1 by ajutage 1A in the future.Be provided with charging aperture 3 and loading hopper 15 supporting with it in the capping of the upper end of fine powder chamber 14, also be provided with the fork air outlet 15 of circulation air path, this air outlet 15 is connected on the header pipe road by automatic regulating valve 7.The lower end of whole casing is that the blanking port of sorter and the meal powder storehouse 27 that falls connects.

On separation performance, will be better than existing sorting unit greatly by the designed spiral basket type sorter of above structure.Surrounding into round table-like endless belt at the set stacked ring-type current divider 17 of hypomere by 3-4 forms, the radially physical dimension of the endless belt that intussusception forms is by diminishing gradually successively from the top down, bottom annulus is reverse frustoconic, each other by the fixing relative position of the gusset 17A of vertical direction.Above structural design when air-flow after air outlet 20 enters in the housing, angular speed that can the accelerated band material pneumatic and strengthen centrifugal component, when the air-flow per pass ring by current divider successively, can both further quicken the sinking speed of the lift and the meal of fine powder, its intensified sorting effect is especially obvious, mix the air quantity of fork ajutage 15 and regulate control and the raising receipts powder efficient that control can realize the fine powder technical indicator effectively, the improvement of this structure is one of key measure of the utility model design.

In the complete structure design of sorter 8, also comprise the spiral basket type tripper 19 in the piece housing in being located at, this tripper 19 is by spiral shell basket rotor 22, propeller type material separating disc 23, the outer drive unit of sorter 19 upper end seal covers that is arranged on that rotating spindle 21 links to each other with transmission main shaft is formed, and expects that through the removing of spiral shell basket rotator type of improving design tripper also is the design's a important component part.Rotary propeller type is removed charging tray 23 and is made up of disc and fan blade, the blade that has helix angle is in the high speed rotary course, not only material evenly can be shed, make it and match along the shell wall swirling eddy, but the compound action that helps centrifugal force, gravity and fluid lift force makes material be in more violent fluidized state, make qualified fine powder and meal form upper and lower relative displacement logistics, and in this process, can be effectively further impact comminution because the moisture wet fine powder unity piece that forms that closes, the chance that the increase fine powder is selected.Spiral shell basket rotor 22 also can play the similar action that disperses vanelets simultaneously, has increased the chance of being selected of qualified fine powder equally.Qualified fine powder is along with the air-flow of separating step by step along with rising enters the fine powder chamber of epimere, and is secant-shaped injects the careful powder gatherer 1 of whirlwind under the guiding of air-flow, finishes the efficient sorting operation of selecting most critical in the powder operation.The rotating speed of transmission main shaft 21 can directly have influence on granularity position in storehouse and the quantity that sub-elects fine powder, can finish the control of powder particle size effectively by the rotating speed of adjusting this, mix the automatic receipts powder control procedure that the control of microcomputer system can realize in the certain limit quantitatively, decide matter.

The careful powder gatherer 1 of whirlwind also is the vitals in this device, it can be provided with 2-4 be evenly distributed on cylindric sorter 8 around.Concrete structure is elongated cylindrical (top) bottom and is coniform, and upper end is provided with air-vent 1A and communicates with air inducing house steward 2.The air port communicates with air outlet on the sorter epimere fine powder chambers 8 when tangentially being provided with on the round barrel shape outer wall of top.The fine powder discharging opening is provided with the terminal of conically shaped body and directly communicates with fine powder receipts powder storehouse 28, is located in the upper end capping of this feed bin.In order further to improve fine powder rewinding efficient, can also set up a helical wind-guiding device at the hypomere of the sub-powder collector of whirlwind, with separating smoothly of further promotion powder and gas, improve and receive powder efficient.

In order to adapt to the thinking of above global design, the blanking storehouse that this device cooperated is the structure of a bicone shell combined type, wherein the meal powder storehouse 27 that falls is positioned at the center and directly is connected with the end of sorter 8, the fines all positions of ring, 28 in powder storehouse that fall are made up of the space of the folder of two cone shells, and the fine powder collector 1 terminal discharging opening by upper end capping and each whirlwind minor connects.The thickness powder respectively is provided with independently meal outlet.

More than total induced duct 2 of forming by the peripheral hardware air pipeline of designed each several part and ajutage 4 fork ajutages 3 be connected in series with air blast and form the closed cycle wind system, on the air path pipeline of this system, be provided with automatic volume damper 5,7 and residue-removing door 10,11,12, with supporting corresponding electronics sampling and regulation device, realize dividing the control of branch road air-supply and total air inducing amount, to regulate the quality and the output of fine powder, realize the best scheme of selecting, residue-removing door 10,11,12 design in time obtains to clear up the reasonable control that guarantees air quantity in order to make the powder in the deposition pipeline.Total induced duct 2 is connected on the air inlet of air blast, and total ajutage 4 is connected on the defeated air port of air blast.It will show the closed cycle operation that forms bigger advantage and replace outmoded powder selection device and technology.

The model machine of making by above design, flour extraction through its fine powder of experimental run improves greatly, the granularity that supporting upward control corresponding device can also be regulated fine powder effectively, and show significantly easy to operate and energy consumption decline, and having significant environmental benefit, is a significant improvement to mill industry.

Claims (7)

1, spiral shell basket rotor circulated air powder concentrator, comprise spiral shell basket swinging sorter (8) in its structure, the careful powder gatherer of whirlwind (1), the supporting powder storehouse that falls (25,26), guide duct, volume control damper door (7,5), it is characterized in that the spiral case case air outlet air outlet of swinging sorter (8) and the air inlet of the careful powder gatherer of whirlwind (1) tangentially are connected in series, both air inlets (20) and air outlet (1B) then form a closed circuit wind loop structure by peripheral hardware airduct (4,2) and air blast (6) series connection respectively.

2, according to the said powder concentrator of claim 1, it is characterized in that swinging spiral shell basket sorter (8) is by three sections cylinder blankets be arranged on the stacked annular current divider of hypomere (17) in the shell and the spiral shell basket rotor tripper (19) that is located in the stage casing is formed, air inlet (20) is arranged on the shell hypomere and links to each other with the ajutage (4) of air blast, the cavity that shell epimere cylinder forms is fine powder chamber (14), be provided with above along the air outlet of tangent line design and communicate with the top air inlet of the sub-gatherer of whirlwind (1) outside the shell, the upper end seal cover of fine powder chamber (14) is provided with the fork blast pipe (15) of feed pipe (3) and circulation air path, this bifurcated pipe (16) links up with air blast air outlet house steward (4) mutually by control valve (7), and the hypomere bottom is that the coarse fodder meal outlet directly links to each other with coarse fodder storehouse (25).

3, according to the said powder concentrator of claim 2, it is characterized in that stacked annular current divider (17) is made up of the endless belt that 3-4 surrounds into truncated cone-shaped, but radially several sizes are from evenly diminishing downwards down, and one of below is round table-like ringwise, links into an integrated entity by vertical rib (17A) successively.

4, according to the said powder concentrator of claim 2, it is characterized in that spiral basket type tripper (19) by spiral shell basket rotor (22), screw is removed charging tray (23), and the drive unit (24) that transmission main shaft (21) and power transmission shaft (21) link to each other is formed.

5, according to the said powder concentrator of claim 1, it is individual to it is characterized in that the careful powder gatherer of whirlwind (1) can be established 2-4, be arranged on swinging spiral shell basket sorter (8) around, it is cylindric that epimere is, air-vent (1B) is located at the top and communicates with the air inducing house steward (2) of air blast, air inlet is the tangential direction setting and links to each other with the tangential discharge pipe of shell of sorter (8) fine powder chamber, upper end (14) in cylindrical shell side, top, hypomere is taper, and the bottom is that the fine powder discharging opening directly is connected in fine powder and falls on the upper cover of powder storehouse (26).

6, according to the said powder concentrator of claim 1, it is characterized in that falling that powder storehouse (25,26) is made up of two suit conical shells, wherein the meal powder storehouse (25) that falls communicates with sorter (8) discharging opening in the center, fine powder falls powder storehouse (26) in all positions of the ring of coarse fodder storehouse (25), discharging opening by the careful powder gatherer of upper end capping and each whirlwind (1) communicates, and the thickness powder respectively is provided with outlet (27,28).

7, according to the said powder concentrator of claim 1, it is characterized in that the peripheral hardware air pipe line has total induced duct (2), ajutage (4) and air-supply bifurcated pipe (15), on pipeline, be provided with residue-removing door (10,11,12) and automatic regulating valve (7,5), induced duct (2) is connected to air blast (6) air inlet, and total ajutage (4) changes the air outlet of air blast (6).

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