CN1032929C - Method and system for pneumatic conveying of slurry - Google Patents

Abstract

The present invention relates to a pneumatic soil conveying method and a system thereof, particularly to a soil conveying method in earthwork engineering and a device thereof. The method of the present invention comprises the steps that soil is fed by a feeding device; soil in a pipeline is forwards pushed for being conveyed by using compressed air as power for pushing the soil. A method of adding lubricating water in the pipeline and carrying out pulse gas cutting to the soil is used for the present invention for reducing conveying resistance. The device of the present invention is formed by the concatenation of the soil feeding device, a soil conveying pipe and a water ring air-cushioning device arranged on the soil conveying pipe. The present invention provides a fire-new soil conveying method which has the characteristics of high efficiency, convenience and practicality. The device used for the present invention has the advantages of simple structure, little energy consumption, far conveying distance, large conveying volume and convenient movement.

Description

A kind of pneumatic conveying of slurry method and system

The present invention relates to muck haulage method and system thereof in a kind of excavation of earthwork, specifically, is a kind of cubic metre of earth strength carrying carrying method and system.

Drag in the mud carrying engineering existing, for the bigger water saturation soil of viscosity (as the mud beach on seashore) is to be difficult to construct with excavator and the supporting operation of truck, because truck is difficult to travel, like this, just can't be done moving of longer distance by the mud that excavator has dug on smooth mud bank.Also have,, can only accomplish the short distance handover, can't finish the earth earthwork carrying work of longer distance as simple employing screw conveyer.Adopt the indigenous method of removing of slush pump discharging, because need a large amount of water sources in suction place, in the floss hole discharge is not piece mud, but the very high slime water of water content, therefore can bring disaster to large stretch of ground, if when building sea wall, floss hole is placed near carrying Ba Chu, can brings disaster on the contrary and carry dam (causing breaking-up).Above-mentioned three kinds of muck haulage schemes commonly used are to all not competent such as the moistening earth of water saturation that carrying viscosity is big in the fill of seawall.

The purpose of this invention is to provide and grow distance cubic metre of earth carrying on a kind of beach by the sea, to finish the job practices of fill task.This method is to replace truck with pipeline, and the slip that will dig from the seabeach is done to transfer at a distance, and the clod that drops out from pipe outlet can directly be used to pile the fill dam, or dykes and dams are keeped in repair or large tracts of land is enclosed and filled out.This method also can be used for the carrying of other occasions realizations to the earthwork.

The solution of the present invention be adopt various forms can accept the earthwork, and the earthwork be pressed into feed the mud device in the mud conveying pipeline.Should feed the mud input channel that mud device will dig from excavation of earthwork, and then pass forward to delivery outlet with the mud that compressed air will enter pipeline and to draw off.

Preferably be passed in the mud conveying pipeline when compressed air that is adopted among the present invention program acts on mud conveying pipeline and go in the mode of air pulse.Thereby air pulse can be cut into the mud in the pipeline isolated mud section reduces the resistance that pushes away mud, the special needs so when the long distance of work is carried.For more short-range defeated mud, also can not adopt air pulse and use continuous air-flow instead to promote earth.

Compressed air acts on realizes in the mud conveying pipeline that the passing to earth is a requirement of the present invention, but also can feed compressed air in feeding unit, realizes the passing of earth to the mud conveying pipeline direction.In feeding unit, also can not feed compressed air, self have pair earth to produce when enough pushing the function of pressure, just need not import compressed air as long as feed the mud device.

In order to make the earth that enters in the pipeline in the handover process, reduce the coefficient of friction resistance, be necessary the earth injection pressure water in pipeline.It is best sliding agent that water and mud mix the formed smooth mud in back mutually, and it makes and can be compressed air like a cork in the mud Duan Zaiguan of a section space and pass.The another one effect of water is to make a section mud post (can regard it as slide block) in the process of inner cavity of pipe (can regard it as cylinder barrel) slippage, keeps the dynamic seal (packing) state, and compressed-air actuated work doing efficiency is improved.The position that adds water for mud conveying pipeline generally is to be arranged in and adjoining position, compressed-air actuated aerating position, certainly also be fine from a distance between the two, preferably both are adjacent at a place, by the flow direction of defeated mud, preferably spray water preceding, jet after.Also can be that gas-vapor mix sprays into.

The used special equipment of the present invention is the integrated system that a cover is made up of dispenser apparatus, mud conveying pipeline and the water ring air-cushion device fixed thereon of feeding unit, compressed air and press water.

Can adopt the conventional equipment such as the gas-tight container that has able to turn on or off bell jar, impeller pump, lobe pump, rotary slider pump and helicoidal pump that use in the general strength conveying about feeding unit.Feeding unit is disposed in the hopper end opening, and it can be divided into two kinds of compressed air type and airlesses.The compressed air type feeding unit is applicable to the impeller pump and the lobe pump of gasing tank and rotor (blade) root band compressed air through hole.The airless feeding unit can adopt screw delivery pump and rotary slider pump, certainly, adopts impeller pump, the lobe pump of no gas to mix flexible pipe and is aided with the mechanism of shaking and also is fine.

For connecting pipe, can adopt flexible pipe and rigid pipe, plastic pipe and steel pipe are used always.Owing to have compressed air to exist in the pipeline, when feeding unit can be kept the basic isolation in the dredging tube inner chamber and the external world all the time in operation process, can not add the keying gate in the coupling part of feeding unit and dredging tube.But when feeding unit can cause the mud conveying pipeline inner chamber to be linked up mutually with ambient atmosphere in running, then the connecting portion between feeding unit and mud conveying pipeline added the keying gate.Its effect is, in case when needing to open feeding unit, in advance with this closing gate, the passage that allows the mud conveying pipeline inner chamber be communicated with feeding unit is blocked, so just can prevent the interior mud of the dredging tube into feeding unit that flows backwards.Certainly if take once just the earth in the airtight feeding unit to be transported to the destination, the mode of opening airtight feeding unit charging then and beginning to carry next time then can not established opening/shutting valve between feeding unit and mud conveying pipeline.

Be fed forward the water ring air-cushion device on the mud conveying pipeline of being mounted in that plays a major role to promoting earth.The primary structure of this device is exactly to open oblique through hole on the tube wall of dredging tube, makes the compressed air stream that enters in the pipe both play the mud effect of cutting like this, plays the effect that pushes away mud forward again.The sealed packet of ring bag one circle hollow on the residing tube wall outside circumference of an oblique through hole of circle.Described oblique through hole cloth on mud conveying pipeline circularizes, wrap in described ring packing and to be provided with one or more compressed air air inlets and to chew, like this, compressed air from source of the gas in pipe arrangement, valve enter described annular bag, enter in the dredging tube by described oblique through hole again, the earth in it is cut mud and pushed away mud.If with above-mentioned annular bag remove need not, chew and an air inlet directly is installed on each oblique through hole, it is effective and feasible that such scheme remains.

Substantially the same for the scheme of press water being introduced in the mud conveying pipeline in the above-mentioned scheme of compressed air being introduced dredging tube, it also is the scheme that adopts the annular bag on the dredging tube periphery wall that the oblique through hole cladding on the dredging tube tube wall is sealed, press water passes through pipe arrangement, valve enters annular bag inner chamber, is injected in the dredging tube by oblique through hole again.

The compressed-air actuated annular bag of above-mentioned conveying can link into an integrated entity with the annular bag of output pressure water, and the centre is divided into two toroidal cavities with dividing plate.Also gas transmission annular bag can be drawn back a segment distance with water delivery annular bag arranges.If the direction that earth is carried is considered as direction forward, before water delivery annular bag preferably is arranged in so, and after allowing gas transmission annular bag be arranged in.Mud is through extruding, and interstitial water wherein is extruded and is attached on the tube wall, and the preceding defeated formation mud with the mud post can obtain best effect like this.Because water preceding, gas after layout can allow water be diffused in the earth along the injection direction of gas, and water also is compressed air easily and presses near the internal perisporium of mud conveying pipeline, lubricant effect might as well.Be transferred the difference of distance according to earth, a plurality of water ring air-cushion devices can be set on mud conveying pipeline.Certainly take one group of annular gas transmission sealed packet, annular water delivery sealed packet again the form of one group of annular gas transmission sealed packet also be feasible.

The present invention has following advantage: 1. can carry soft sticking moist material, solve and had constantly held the difficult problem that soft sticking material can't strength be carried.2. energy consumption is little, and conveying capacity is big.Owing to taked air cushion water ring method, so material resistance of motion in pipeline is very little.3. fed distance is far away, and conveying capacity and fed distance can be adjusted as required.4. move flexible, arrangement convenience.5. simple in structure, reliable and practical.

Fig. 1 is an overall plan arrangement diagram of the present invention.

Fig. 2 is an impeller pump formula feeding unit schematic diagram.

Fig. 3 is a gas-tight container formula feeding unit schematic diagram.

Fig. 4 is a water ring air-cushion device schematic diagram.

Fig. 5 is the section diagrammatic sketch of Fig. 4.

Fig. 8 is the schematic diagram of the embodiment of the invention.

Fig. 7 is the schematic diagram of another embodiment of the present invention.

Fig. 8 is a rotary slider formula feeding unit schematic diagram.

Fig. 9 is a lobe pump formula feeding unit schematic diagram.

Figure 10 is a screw delivery pump formula feeding unit schematic diagram.

Figure 11 is a dredge pump formula feeding unit schematic diagram.

The present invention is further illustrated below in conjunction with drawings and Examples.

As shown in Figure 1, pneumatic conveying of slurry method of the present invention comprises in feeding unit (1) feeding earth, is that thrust is pushed ahead conveying with ducted earth with compressed air.At first earth is admitted in the feeding unit (1), through tube connector (3) earth is sent into earth carrier pipe (4) by feeding unit again.Because the carrying capacity of feeding unit is big inadequately, therefore earth at the front end dress strength assist device (2) of dredging tube, just be incorporated into gases at high pressure in the mud conveying pipeline through the trend of existing stagnation behind the tube connector.Make earth in mud conveying pipeline, continue to be fed forward by gases at high pressure to the pressure that earth produced.Suffered resistance when moving in mud conveying pipeline in order to reduce earth, press water is introduced at close position with introducing pressure-air on dredging tube.Water is at the mud conveying pipeline wall and be transferred formation mud lubrication layer between the earth, has reduced the mud conveying pipeline wall greatly to being failed the resistance of earth.Simultaneously, the existence of lubricating layer is also to sealing between mud conveying pipeline tube wall and the earth, thereby more helps the maintenance of pressure in the mud conveying pipeline, improves transfer efficiency.According to the distance of required fed distance, can there be many places at the position of introducing compressed air and water in mud conveying pipeline, maintains a certain distance between each position.In order further to reduce transporting resistance, improve transfer efficiency, introduce compressed air in the mud conveying pipeline and be form with adjustable pulse and act on and be transferred earth.The pulse compression air enters by the aperture on the mud conveying pipeline wall, and earth is had very strong dissection.Therefore earth is cut into sectional cylinder in mud conveying pipeline, is the compression gas column between every section cylindrical earth.Promote the mud post by the compression gas column like this and in mud conveying pipeline, move, realize the remote conveying of earth.If being introduced mud conveying pipeline, water then can play effect lubricated and sealing.Then can adjust the length of mud post and gas column by the control of paired pulses pulse of compressed air frequency and amplitude, to be implemented under the different condition conveying to earth.Because pulse gives gas and gas material than adjustable, so can control the length of mud post and gas column.Fed distance is far away, and gas column is longer; The gas column weak point that fed distance is near.Fed distance is nearer, can not adopt the form of pulse during gas transmission.

Feeding unit of the present invention has rotary slider pump, helicoidal pump, impeller pump, lobe pump, has the gas-tight container of able to turn on or off loam cake etc.Wherein rotary slider pump and helicoidal pump are by slide block and helical blade earth to be clamp-oned or is pressed in the tube connector.And outer isolated mutually in the pump with pump, the pressure in the dredging tube can not lose by rotary slider pump or helicoidal pump.Introduced compressed air in impeller pump, the lobe pump, the pressure of air is pressed into tube connector with earth from pump, and this pressure also has booster action to the earth in the mud conveying pipeline.The then complete pneumatically pressure of gas-tight container that has able to turn on or off loam cake is pressed into tube connector with earth therebetween.Detailed process is achieved in that at first loam cake is opened that earth enters gas-tight container, then loam cake is closed, and compressed air is introduced into gas-tight container, by compressed air earth is pressed into tube connector.Before opening loam cake, close the valve on the tube connector earlier, so that mud conveying pipeline and gas-tight container are separated.Open the pressure that the relief port that is arranged on the gas-tight container sheds gas-tight container again, open the feeding once more that loam cake is prepared earth at last.

And for example shown in Figure 1, pneumatic conveying of slurry of the present invention system is made up of feeding unit (1), tube connector (3), dredging tube (4), water ring air-cushion device (2) and compressed air source, water source, appendix, water-supply-pipe, valve etc.Wherein feeding unit (1) is in series through tube connector (3) and dredging tube (4).Water ring air-cushion device (2) is positioned on the dredging tube (4), and water source, source of the gas pass through valve, appendix, water-supply-pipe to water ring air-cushion device (2) air feed, water supply.Also can pass through appendix, valve to the feeding unit air feed according to described different feeding units, source of the gas.

As shown in Figure 2, impeller pump is made of the cylindrical shell (8) and the impeller of band hopper (6) and discharging opening.Hopper and discharging opening are symmetrically located on the bolt face of cylindrical shell.Impeller is placed on the fixation hollow axle (10), and the number of blade (12) can be generally three to eight and not wait according to carrying the needs setting.Adjacent every pair of blade constitutes earth and fills the storehouse.Root at blade has compressed air channel (9), and just the root at impeller has compressed air channel (9).The fixation hollow axle (10) of impeller pump is gone up the position that faces toward discharging opening and is had air channel (11) simultaneously.For the compressed air that earth filling storehouse is taken out of is discharged from, exhaust opening (7) is arranged at the position of the close hopper (6) of cylinder blanket (8) before arriving hopper.Certainly in order to get rid of the earth that sticks on the blade (12), can locate to load onto flow distribution plate (13) in compressed air channel mouth (9), so that compressed air blows to blade.After the earth (5) in the hopper (6) was inserted the filling storehouse, impeller began rotation, made the earth of filling in the storehouse shift to discharging opening thus.When impeller rotated to certain position, when promptly impeller root compressed air channel (9) was relative with air channel (11) on the fixation hollow axle (10), compressed air charged into earth and fills the storehouse, thereby pressed the earth row who makes therebetween to discharging opening.Simultaneously, impeller continues rotation, and hopper is also shifted in the filling storehouse of the earth of therefore draining gradually.Owing near the position of hopper exhaust opening is arranged, so, arrive the hopper below again at discharging opening drain earlier therebetween the compressed air of the filling storehouse of earth of draining at the garden cylindrical shell.

The gas-tight container that has able to turn on or off bell jar and one-way cock also is one of used feeding unit of the present invention.As shown in Figure 3, this device comprises feed hopper (6), bell jar (14), vibration desludging device (15), charging basket (16) and air inlet port (19), one way valve (18) and pneumatic arm (17).Feed hopper (6) lower end is connected with charging basket (18), and this junction forms the larynx neck between feed hopper and charging basket, also is the charging basket import.In the larynx neck, seal washer is housed.The main body of bell jar (14) is positioned at charging basket (16), is connected with cable wire on it, is connected on the pneumatic arm (17) behind pulley in this cable wire process hopper and the pulley on the bucket wall.Air inlet port (19) is arranged on the wall of charging basket, and this air inlet port also is used as the compressed air outlet opening.One way valve (18) is positioned at the exit of charging basket, in case in the charging basket during no pressure the earth in the earth conveyance conduit pushed back charging basket.When this device used, bell jar at first leaves larynx neck potential drop went in the charging basket, thereby makes the earth in the feed hopper fall into charging basket.For the earth that still sticks on the bell jar, can start vibration desludging device (15) on the bell jar with in its charging basket that shakes.By pneumatic arm (17) pulling cable wire bell jar (14) is risen to larynx neck position then and closely contact, make charging basket (16) become a gas-tight container with seal washer.Compress air with raising wherein pressure by adding this moment in closed container, thereby earth is pressed to the outlet of charging basket bottom.When pressure acquires a certain degree, can close one way valve (18), open the pressure in air inlet port (19) the releasing closed container.Open bell jar at last, carry out next round feeding (earth).Without bell jar, it also is feasible using push-plate type or gland-type instead at the charging aperture place.

Water ring air-cushion device structure of the present invention such as Fig. 4, shown in Figure 5.On the mud conveying pipeline outside circumference sealed packet is housed, sealed packet is divided into compressed air cell (23), current chamber (20).On compressed air cell and current chamber, have compressed air to import respectively to chew (22), press water imports and chews (21).Be processed with respectively on the mud conveying pipeline wall in compressed air cell (23) and current chamber (20) around aperture (24).Certainly, compressed air cell and current chamber being separated a segment distance also is fine.Especially earth is carried in short distance, can be without the current chamber.If it also is feasible that the aperture in the sealed packet changes into around the louver of mud conveying pipeline and water filling seam.In order further to improve gas-assisted effect, air vent, water injection hole axially are symmetrically distributed along mud conveying pipeline, and air vent (or seam), water injection hole (or seam) be tiltedly to lead to form.If do not adopt the form of sealed packet, employing is chewed gas with water filling and is chewed and corresponding air vent and the direct-connected scheme of water injection hole, also can reach effect same.

Fig. 6 is a most preferred embodiment schematic diagram of pneumatic conveying of slurry of the present invention system.Earth in the hopper is sent to mud conveying pipeline after entering the gas-tight container formula feeding unit that has able to turn on or off bell jar and one-way cock.Be positioned on the mud conveying pipeline the water ring air-cushion device to earth cut, boosting, lubricated, make earth can be sent to farther place.Compressed air is supplied with feeding unit and water ring air-cushion device simultaneously.

Fig. 7 is another most preferred embodiment schematic diagram of pneumatic conveying of slurry of the present invention system.The feeding unit here is an impeller pump, and the air feed circuit of impeller pump is given in omission.

In pneumatic conveying of slurry of the present invention system, can also adopt rotary slider pump formula feeding unit.As shown in Figure 8, the rotary slider pump is made of the fixed center axis (30) of cylindrical housings (26), feed hopper (6), the rotatable cylinder (27) that is positioned at housing band cavity, the slide block (28) that is positioned at cavity and band sector gear (25).Wherein, discharging opening is positioned at the bottom of housing (26), and rotatable cylinder (27) closely contacts with housing, and the cavity in the rotatable cylinder is laterally through cylinder, thereby provides the space for the reciprocating motion of slide block.Slide block is a ducted body, and one pair of tooth bar (29) is housed in the body cavity of slide block in opposite directions.The curvature of two end faces of slide block is identical with the cylindrical curvature of cylinder (27).One pair of tooth bar (29) in the slide block cavity alternately meshes with sector gear (25), moves back and forth thereby order about slide block.Charging is when (earth), and two cylinders of slide block are respectively facing to feed hopper (25) and discharging opening, and slide block is in extreme lower position, fills the storehouse thereby form below feed hopper.After earth fell into the filling storehouse, cylinder (27) was driven and begins rotation, and the earth of filling the storehouse is along with cylindrical rotation is sent to discharging opening from the feed hopper below.Because fixed center axis (30) all maintains static with sector gear, after cylinder turned over certain angle, a tooth bar began to mesh with sector gear.Also communicate and fill the part in storehouse this moment with discharging opening.Along with the continuation of this rotation, slide block is shifted onto the other end from an end, thereby the earth that will fill in the storehouse is clamp-oned discharging opening.And the other end of slide block begins to move down the new filler storehouse of formation.Two toothed rack alternately mesh with sector gear, form the process of periodic filler, discharge, finally realize the feeding and the conveying of earth.

Lobe pump also be pneumatic conveying of slurry of the present invention system can adopt feed one of device.As shown in Figure 9, lobe pump is made of hopper, housing (32), two rotors (34), two hollow shafts (35).All have on two hollow shafts on air channel (31), two rotors compressed air channel (33) is arranged.Cooperation in opposite directions by two rotors is rotated, and makes the earth in the hopper constantly be sent to discharging opening.And when epitrochanterian compressed air channel was relative with air channel on the hollow shaft, the compressed air in the hollow shaft entered in the lobe pump, and earth is produced propelling pressure.

Screw delivery pump as shown in figure 10 also is one of feeding unit of the present invention.This helicoidal pump is made of the axle (38) of housing (38) and band helical blade (37).Charging aperture and discharging opening are arranged on the housing, and wherein charging aperture is tubaeform, thereby more helps entering of earth.In order to give earth one extruding force that enters screw delivery pump, the pitch of helical blade is not wait.Advance pitch more greatly in that charging aperture is attached, pitch is littler near discharging opening, and it is gradual change that certain this pitch changes.After the earth that is entered into helicoidal pump by charging aperture is sent to discharging opening by helical blade, promptly can directly enters mud conveying pipeline and after strength assist device boosting, be sent to the destination; Also can deliver to transmission jar (39) earlier and enter mud conveying pipeline from sending jar again.Here the transmission jar of being said has charging aperture and discharging opening, and there is one way valve (40) at the charging aperture place, and discharging opening links to each other with mud conveying pipeline.There is air inlet to chew (41) at the top that sends jar, so that impose certain pressure for jar interior earth.Can adopt a plurality of helicoidal pumps to send a jar scheme of feeding mud to one simultaneously in order to increase the earth traffic volume that sends jar.

As shown in figure 11, dredge pump formula feeding unit is by reciprocating type tube (42), working cylinder (43), three way cock (44), feed pipe (45), discharge nozzle (46) formation of taking out.Three openings of three way cock connect working cylinder, feed pipe, discharge nozzle respectively.At first three way cock is closed discharge nozzle, and earth is sucked working cylinder from feed pipe, and three way cock is closed discharge nozzle then, and the earth in the working cylinder is pressed towards discharge nozzle.So circulation constantly just can realize the earth feeding.Certainly, earth advances feeding pipe for convenience, can install the loose mud device of a rotation before feed pipe additional.The discharge nozzle native carrier pipe that can directly graft clay also can be connected on earlier to send and jar goes up and then connect mud conveying pipeline.

The feeding unit of above-mentioned screw delivery pump and dredge pump is because in when work otherwise offset is moving, thus should be mounted aboard ship, with the ship mobile operating.But strength sends and jar must directly link to each other with mud conveying pipeline again, so, be mounted aboard ship screw delivery pump and dredge pump and described strength transmission pipe between the employing flexible pipe be connected, like this, this two major part can be kept relative motion to a certain extent.

Claims (23)

1. a pneumatic conveying of slurry method comprises the steps: a) earth to be sent into feeding unit; B) earth in the feeding unit is sent into mud conveying pipeline: it is characterized in that c) with pulse compressed air the earth in the mud conveying pipeline is carried out cutting section: d) and by pulse compressed air the earth in the mud conveying pipeline is pushed ahead conveying.

2. pneumatic conveying of slurry method according to claim 1, it is moistening to it is characterized in that earth top layer in the mud conveying pipeline is added water, thereby forms mud layer between mud post top layer and mud conveying pipeline wall.

3. pneumatic conveying of slurry method as claimed in claim 1 or 2 is characterized in that introducing compressed air in feeding unit, so that earth is pressed into mud conveying pipeline.

4. pneumatic conveying of slurry method as claimed in claim 1 or 2 is characterized in that pulse compressed air can be introduced at the different parts of mud conveying pipeline, and each position keeps certain distance mutually.

5. pneumatic conveying of slurry system, include the earth feeding unit, the mud conveying pipeline that links to each other with described feeding unit, it is characterized in that also comprising the pulse compressed air source, be installed in the pulse compressed air introducing device on the mud conveying pipeline, connect the appendix of pulse compressed air source and pulse compressed air introducing device, and be contained on the mud conveying pipeline and the valve between earth feeding unit and pulse compressed air introducing device.

6. as pneumatic conveying of slurry system as described in the claim 5, it is characterized in that on mud conveying pipeline, being equipped with lubricated water introducing device.

7. as pneumatic conveying of slurry system as described in the claim 5, it is characterized in that the compressed air introducing device for some around the through hole that is distributed on the mud conveying pipeline wall.

8. as pneumatic conveying of slurry system as described in the claim 5, it is characterized in that the compressed air introducing device is cracked by continuous circular shape, be positioned on the mud conveying pipeline periphery wall and the described continuous circular shape importing mouth that the annular bag sealed fully and annular wrap that cracks is formed.

9. as pneumatic conveying of slurry system as described in the claim 6, it is characterized in that lubricated water introducing device is for around the through hole that is distributed on the mud conveying pipeline.

10. as pneumatic conveying of slurry system as described in the claim 9, it is characterized in that described through hole is oblique through hole.

11. a kind of pneumatic conveying of slurry as claimed in claim 5 system is characterized in that described feeding unit is an impeller pump.

12. a kind of pneumatic conveying of slurry as claimed in claim 11 system is characterized in that the impeller root of described impeller pump has compressed air channel, on the fixation hollow axle of described impeller pump air channel is arranged, there is steam vent at the position near hopper on shell.

13. a kind of pneumatic conveying of slurry as claimed in claim 11 system is characterized in that at impeller root compressed air channel mouth place flow distribution plate being housed.

14. a kind of pneumatic conveying of slurry as claimed in claim 5 system is characterized in that described feeding unit is a screw delivery pump.

15. a kind of pneumatic conveying of slurry as claimed in claim 14 system is characterized in that the pitch of the helical blade of described screw delivery pump reduces gradually.

16. a kind of pneumatic conveying of slurry as claimed in claim 5 system is characterized in that described feeding unit is the gas-tight container that has able to turn on or off loam cake, described able to turn on or off loam cake is positioned at the import department of described gas-tight container.

17. a kind of pneumatic conveying of slurry as claimed in claim 16 system is characterized in that able to turn on or off loam cake is to have the bell jar that vibrates desludging device.

18. a kind of pneumatic conveying of slurry as claimed in claim 16 system, it is characterized in that when described able to turn on or off loam cake is closed and the import of gas-tight container week along between accompany seal washer.

19. a kind of pneumatic conveying of slurry as claimed in claim 5 system is characterized in that described feeding unit is the rotary slider pump.

20. a kind of pneumatic conveying of slurry as claimed in claim 19 system, it is characterized in that described rotary slider pump is made of the housing of hopper, band discharging opening, the slide block that is positioned at the cylinder of described housing band cavity and is positioned at described cavity, described slide block is a ducted body, on described ducted body opposed inner walls a toothed rack is arranged respectively, the sector gear of making clearance meshing with tooth bar is fixed on the central axis still.

21. a kind of pneumatic conveying of slurry as claimed in claim 5 system is characterized in that the strength transmission jar that described feeding unit includes dredge pump, the loose mud device of rotation, is connected with described dredge pump.

22. a kind of pneumatic conveying of slurry as claimed in claim 21 system is characterized in that described dredge pump includes reciprocating type tube, three way cock, feed pipe, the discharge nozzle taken out that is unloaded driving by work, feed pipe, discharge nozzle, the reciprocating type tube of taking out all link to each other with three way cock.

23., it is characterized in that being connected with between described screw delivery pump and the mud conveying pipeline strength and send jar as claim 14 or 15 described a kind of pneumatic conveying of slurry systems.

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