CN209287729U - A kind of grain separator with level Four dust-extraction unit - Google Patents

Abstract

The utility model discloses a kind of grain separator with level Four dust-extraction unit, which is characterized in that including primary dust removing device, two-stage dust removal device, 3-stage dust-removal device, level Four dust-extraction unit；Primary dust removing device includes air classifier, at least one first dust absorption fan, grey gas separation assembly；First dust absorption fan is connected with air classifier；Grey gas separation assembly includes connecting cylinder, communicating pipe, and connecting cylinder is connected with the first dust absorption fan；Communicating pipe is connected with connecting cylinder；Two-stage dust removal device includes intermediate tube, the first connecting tube, and first connecting tube one end is connected with communicating pipe, the other end is connected with intermediate tube；3-stage dust-removal device is connected with intermediate tube；Level Four dust-extraction unit is connected with intermediate tube.The utility model can remove most of dust in grain.

Description

A kind of grain separator with level Four dust-extraction unit

Technical field

The utility model relates to grain cleaning equipment fields, and in particular to a kind of grain cleaning with level Four dust-extraction unit Machine.

Background technique

Grain is sent into silo after drying, dedusting and is stored after harvesting, the method for the existing dedusting to grain For grain is passed through vibrating screen, by the processing of vibrating screen, removes the dust in grain, this processing existing defects, grain exists It can flock together in vibrating screen, so that the dust of grain surface attachment not can be removed, the grain sent out from vibrating screen discharge end There are many dust, dedusting is not thorough for surface attachment.

Utility model content

The purpose of the utility model is to overcome above-mentioned technical deficiencies, provide a kind of grain cleaning with level Four dust-extraction unit Machine, the dust for solving to remove by vibrating screen in the prior art in grain remove halfway technical problem.

To reach above-mentioned technical purpose, it is clear that the technical solution of the utility model provides a kind of grain with level Four dust-extraction unit Reason machine, which is characterized in that including vibrating screen, primary dust removing device, two-stage dust removal device, 3-stage dust-removal device, level Four dedusting dress It sets；The primary dust removing device includes air classifier, at least one first dust absorption fan, grey gas separation assembly, the selection by winnowing utensil There are feed inlet, discharge port, dust outlet, the feed inlet of the air classifier is connected with the discharge port of the vibrating screen；Described The air intake of one dust absorption fan is connected with the dust outlet of the air classifier；The ash gas separation assembly includes connecting cylinder, ash Gas separation member, multiple communicating pipes, the connecting cylinder boring, the connecting cylinder outer peripheral surface, which is recessed inwardly, is formed with air inlet, The air inlet of the connecting cylinder is connected with the outlet air end of first dust absorption fan, the inlet end of the ash gas separation member and institute Connecting cylinder is stated to be connected；The communicating pipe is connected with the connecting cylinder；The two-stage dust removal device includes intermediate tube, Duo Ge One connecting tube, return pipe, one end of first connecting tube are connected to the connection pipe outer wall, and first connecting tube and institute It states and is connected communicating pipe, the other end of first connecting tube is connected with the intermediate tube；One end of the return pipe and institute State that intermediate tube is connected, the other end is connected with the air intake of first dust absorption fan；The 3-stage dust-removal device includes extremely Few first cyclone separator, at least one second dust absorption fan, first cyclone separator have air inlet, outlet Mouth, slag notch, the air intake of second dust absorption fan are connected with the intermediate tube, the outlet air end of second dust absorption fan It is connected with the air inlet of first cyclone separator；The level Four dust-extraction unit includes at least one second cyclonic separation Device, at least one first admission line, at least one Boiler pressure control part, at least one third dust absorption fan, first air inlet One end of pipeline is connected with the intermediate tube, and the Boiler pressure control part is arranged in a one-to-one correspondence with first admission line, institute It states Boiler pressure control part and is set to first admission line, for controlling the throughput size by first admission line； The inlet end of the third dust absorption fan is connected with the other end of first admission line, and the third dust absorption fan goes out Gas end is connected with the air inlet of second cyclone separator.

Compared with prior art, the beneficial effects of the utility model include: that grain enters level-one from vibrating screen discharge port and removes In the air classifier of dirt device, air classifier has differences according to the critical speed of grain and dust and opens grain and dust separation, Grain is discharged from the discharge port of air classifier, and the impurity such as dust then enter the first dust absorption fan from the dust outlet of air classifier, Under the action of first dust absorption fan enter connecting cylinder in, and blow and beat connection pipe outer wall on, after dust enters connecting cylinder, dust into In ash charge gas separation member, most of dust in grain can be removed；By the way that intermediate tube, the first connecting tube, return pipe is arranged, can incite somebody to action The air that communicating pipe is discharged is passed through primary dust removing device again, can remove the dust in the exhaust of primary dust removing device；Pass through setting First cyclone separator, the second dust absorption fan can largely handle the gas for being passed through intermediate tube.Level Four dust-extraction unit, dust are set Enter in the second cyclone separator from intermediate tube through the first air inlet pipe, third dust absorption fan with the mixture of air, passes through second Cyclone separator is dusted processing to air, when the processing of 3-stage dust-removal device does not come, controls Boiler pressure control part, makes to flow through The throughput of first air inlet pipe increases, and handles gas in a part of intermediate tube by the second cyclone separator, can reduce and flow to the The gas of one cyclone separator reduces the treating capacity of the first cyclone separator, in the gas that the first cyclone separator is discharged not Containing dust.

Detailed description of the invention

Fig. 1 is the schematic three dimensional views of the utility model；

Fig. 2 is office's enlarged diagram in Fig. 1 at M；

Fig. 3 is the schematic three dimensional views at another visual angle of the utility model；

Fig. 4 is office's enlarged diagram in Fig. 3 at P；

Fig. 5 is the structural schematic diagram of the utility model；

Fig. 6 is office's enlarged diagram in Fig. 5 at Q；

Fig. 7 is office's enlarged diagram in Fig. 1 at N；

Fig. 8 is the schematic three dimensional views at the another visual angle of the utility model；

Fig. 9 is the top view of the utility model；

Figure 10 is office's enlarged diagram in Fig. 9 at R；

Figure 11 is the structural schematic diagram at another visual angle of the utility model；

Figure 12 is the schematic three dimensional views of dust collecting and grey gas separation assembly in the utility model；

Figure 13 is the schematic three dimensional views of deslagging device in the utility model；

Figure 14 is office's enlarged diagram in Figure 13 at S；

Figure 15 is office's enlarged diagram in Figure 13 at T；

Figure 16 is that the three-dimensional of the second residue outlet, third residue outlet, circle body discharge unit, antiskid unit and fixed cell is shown It is intended to；

Figure 17 is office's enlarged diagram in Figure 16 at U；

Figure 18 is office's enlarged diagram in Figure 16 at V；

Figure 19 is the schematic three dimensional views of volume damper in the utility model；

Figure 20 is the schematic three dimensional views of air quantity control piece in the utility model；

Figure 21 is the schematic three dimensional views of air quantity regulating part in the utility model；

Figure 22 is the schematic three dimensional views that air quantity adjusts component in the utility model.

Specific embodiment

In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain The utility model is not used to limit the utility model.

Embodiment one:

The utility model provides a kind of grain separator, as shown in Fig. 1 to 22, including car body a, feed hopper b, charging remove Dirt device c, vibrating screen d, at least one deslagging device e, dust collecting f, primary dust removing device g, two-stage dust removal device h, 3-stage dust-removal device i, level Four dust-extraction unit j, conveying device k, discharging dust-extraction unit l.

Feed hopper b is horizontally placed on car body a, and is arranged close to the one end car body a.

Feeding dust-extraction unit c includes dust hood c1, multiple first sweep-up pipe c2, at least one first blower c3, at least one A cyclonic separation part c4；Dust hood c1 is set on feed hopper b, one end of the first sweep-up pipe c2 across dust hood c1 inner wall, The other end is connected with the air intake of the first blower c3；Cyclonic separation part c4 includes that first be vertically arranged removes dirt barrel c41, second Except dirt barrel c42, third are except dirt barrel c43, the 4th are except dirt barrel c44, the 5th are except dirt barrel c45, the first fixing pipe c46, first except dirt barrel C41, second are sequentially communicated except dirt barrel c45 except dirt barrel c44, the 5th except dirt barrel c43, the 4th except dirt barrel c42, third, the first dedusting Cylinder c41 is set on car body a, and first offers an air inlet except dirt barrel c41 outer peripheral surface, and first removes except dirt barrel c41 far from second One end of dirt barrel c42 offers a venthole, and the first air inlet for removing dirt barrel c41 is connected with the outlet air end of the first blower c3 It is logical；The coaxially connected venthole inner wall that dirt barrel c41 is removed in first of first fixing pipe c46, and one end of the first fixing pipe c46 is to the Two extend except dirt barrel c42.

Preferably, it first is square except dirt barrel c41, second is cylindrical except dirt barrel c42；Third is except dirt barrel c43 is along separate Second constantly becomes smaller except the orient diameter of dirt barrel c42；4th except dirt barrel c44 it is cylindrical, and the 4th except dirt barrel c44 diameter it is big In third except the diameter of the miner diameter end of dirt barrel c43；5th is continuous along the orient diameter for removing dirt barrel c44 far from the 4th except dirt barrel c45 Become smaller, and the 5th removes dirt barrel c45 far from the 4th except one end of dirt barrel c44 offers a relief hole.

Dust most in the mixture of air and dust can be removed by cyclonic separation part c4；Cyclonic separation part C4 include first except dirt barrel c41, second except dirt barrel c42, third except dirt barrel c43, the 4th except dirt barrel c44, the 5th except dirt barrel c45, First fixing pipe c46, structure is simple, and manufacturing cost is low；By the way that the first fixing pipe c46 is arranged, one end of the first fixing pipe c46 End face close to second except dirt barrel c42 is arranged, when the air containing dust enters first except in dirt barrel c41, dust and air with Certain speed impacts can make dust and air separation on communicating pipe g33 outer wall, and dust is transported downwards under gravity Dynamic, upward motion of air avoids air and dust directly from first except the top dirt barrel c41 enters atmosphere；When heavier dust and When partial air enters third except dirt barrel c43, dirt barrel c43 is removed due to third and removes the orient diameter of dirt barrel c42 not along far from second Disconnected to become smaller, mutual extrusion between air and dust makes to ramp up from center of the air from third except dirt barrel c43, avoids excessive sky Gas enters the 4th except dirt barrel c44, the 5th remove in dirt barrel c45, prevents air from excessively entering in collecting bag；It is removed when dust enters the 4th After dirt barrel c44, when worker is when changing another collecting bag, close the 5th discharge end for removing dirt barrel c45, but dedusting always into Row, dust endlessly enter always the 4th and remove dirt barrel c44, and the 4th is greater than third except dirt barrel c43's except the diameter of dirt barrel c44 The diameter of miner diameter end can temporarily accommodate more dust, will not dedusting progress, can facilitate worker replace collecting bag.

Vibrating screen d includes shell d1, rubber pad d2, at least one fixing piece d3, and shell d1 is obliquely installed on car body a, Shell d1 has feed inlet, discharge port, slag notch, and shell d1 offers a cleaning window.

The feed inlet of shell d1 is connected with the discharge end of feed hopper b；The relatively described cleaning window setting of rubber pad d2, rubber Pad d2 offers multiple mounting holes, and the mounting hole is arranged close to the side of rubber pad d2, and the size of rubber pad d2 is greater than institute State the size of cleaning window；Fixing piece d3 is arranged in a one-to-one correspondence with the mounting hole, and fixing piece d3 consolidates including a fixed link d31, one Determine block d32, a plain cushion d33, fixed link d31 is mounting hole and is connected to shell d1, and the periphery fixed link d31 across corresponding Face is provided with external screw thread；Plain cushion d33 is sheathed on fixed link d31, and plain cushion d33 is connected to one of rubber pad d2 far from shell d1 End, fixed block d32 offer a threaded hole along the axial direction of fixed link d31, and fixed block d32 is threadedly connected to solid through the threaded hole Fixed pole d31, and it is one end that fixed block d32, which is connected to plain cushion d33 far from shell d1,.Preferably, the quantity of fixing piece d3 is two.

Rubber is directly raised when needing to clearing up inside vibrating screen d by setting rubber pad d2, fixing piece d3 Pad d2 can be convenient and efficient to clearing up inside vibrating screen d；Vibrating screen d at work, can issue always vibration, due to rubber Rubber mat d2 has good damping effect, will not issue harsh noise between rubber pad d2 and the shell d1 of vibrating screen d；Due to rubber Rubber mat d2 is soft and has elasticity, can be bonded the surface at the cleaning window of shell d1, prevent dust in vibrating screen d and gas from Cleaning window escapes outward.

Deslagging device e is arranged in a one-to-one correspondence with cyclonic separation part c4, and each deslagging device e includes slag tap component e1, support Component e2, component e3 is tightened；

The component e1 that slags tap includes feed pipe e11, discharge nozzle e12, hollow tube e13, retaining ring e14, and feed pipe e11 is set to vehicle On body a, and the feed end of feed pipe e11 is set to the lower section of the slag notch of the shell d1 of vibrating screen d；Discharge nozzle e12 is set to Below feed pipe e11, and one end of discharge nozzle e12 is connected to one end of feed pipe e11；One end of hollow tube e13 is connected to out The other end of expects pipe e12, retaining ring e14 coaxial sleeve are set to the other end of hollow tube e13.Preferably, hollow tube e13 is along far from discharging The orient diameter of pipe e12 constantly increases.

Support component e2 includes that the first supporting element e21, the second supporting element e22, the first supporting element e21 include one first connection Bar e211, the first anti-slippery fellow e212, one end of first connecting rod e211 radially horizontal connection in the outer wall of discharge nozzle e12, and First connecting rod e211 is arranged close to hollow tube e13；First anti-slippery fellow e212 is set to the other end of first connecting rod e211.It is excellent Choosing, the first supporting element e21 is stay bolt, convenient for buying, and it is at low cost.

Second supporting element e22 includes one second connecting rod e221, the second anti-slippery fellow e222, and the second connecting rod e221 is radially It is set to the outer wall of discharge nozzle e12, and the outer wall for being set to discharge nozzle e12 connects far from the side of first connecting rod e211, second Extension bar e221 is arranged close to hollow tube e13, and the second anti-slippery fellow e222 is set to the second connecting rod e221 far from the outer of discharge nozzle e12 One end of wall.Preferably, the length of the second connecting rod e221 bar is greater than the length of first connecting rod e211, the second supporting element e22 It can be stay bolt, convenient for buying, and it is at low cost.

Tightening component e3 includes connector e31, a support rod e32, elastic binding tape e33, hooking part e34, connector e31 It is formed for a rod bending, including a third connecting rod e311, circular rod e312, one end of third connecting rod e311 are set to out The outer wall of expects pipe e12, and third connecting rod e311 is arranged close to hollow tube e13, circular rod e312 is set to third connecting rod The other end of e311.

One end of support rod e32 is connected to third connecting rod e311, and the other end of support rod e32 is far from discharge nozzle e12's Outer wall setting.

Elastic binding tape e33 is connected to connector e31, it is preferred that one end of elastic binding tape e33 passes through circular rod E312, and elasticity binding tape e33 is fixed on circular rod e312；Hooking part e34 is connected to the other end of elastic binding tape e33, and Hooking part e34 is removably connected to first connecting rod e211.Preferably, hooking part e34 is a metal crotch.

By the way that first connecting rod e211, the first anti-slippery fellow e212 is arranged, the sack of snakeskin bag can be hung over the first anti-slippery fellow On e212, then snakeskin bag is fixed by elastic binding tape e33, hooking part e34, holds snakeskin always without artificial Bag；By the way that the second connecting rod e221, the second anti-slippery fellow e222 is arranged, and the second connecting rod e221 is set to the outer of discharge nozzle e12 Side of the wall far from first connecting rod e211 can further hook snakeskin bag, prevent snakeskin bag from sliding；It is supported by setting Bar e32 can strut snakeskin bag when snakeskin bag is fixed on discharge nozzle e12 by elastic binding tape e33, and limit snakeskin bag to Lower slider；By the way that retaining ring e14 is arranged, and retaining ring e14 constantly becomes larger along the orient diameter close to discharge nozzle e12, can strut snakeskin The sack of bag, facilitates dust to enter in snakeskin bag；By the way that hollow tube e13 is arranged, and hollow tube e13 is along separate discharge nozzle e12's Orient diameter constantly increases, and dust can be facilitated by hollow tube e13, will not get lodged in hollow tube e13 discharge end.

Dust collecting f includes screw conveyor f1, goes out dirt component f2, decompression sweep-up pipe f3, air quantity adjusting component f4, Screw conveyor f1 is set on car body a；Dirt component f2 includes discharge unit f21, antiskid unit f22, fixed cell f23 out, Discharge unit f21 includes the first residue outlet f211, the second residue outlet f212, third residue outlet f213, circle body f214, and first slags tap Pipe f211, the second residue outlet f212, third residue outlet f213 are sequentially communicated, and the first residue outlet f211 feed end and helical feed The discharge end of machine f1 is connected, and circle body f214 coaxial sleeve is set to the one end of third residue outlet f213 far from the second residue outlet f212, And circle body f214 constantly becomes larger along the orient diameter close to the second residue outlet f212；Preferably, third residue outlet f213 is along separate The orient diameter of second residue outlet f212 constantly increases.

Antiskid unit f22 includes that the first antiskid unit f221, the second antiskid unit f222, the first antiskid unit f221 include One first antiskid bar f2211, the first connector f2212, one end horizontal connection of the first antiskid bar f2211 is in third residue outlet The outer wall of f213, and the first antiskid bar f2211 is arranged close to the second residue outlet f212；First connector f2212 is set to first The other end of antiskid bar f2211；Preferably, the first antiskid unit f221 is stay bolt, convenient for buying, and it is at low cost.

Second antiskid unit f222 includes one second antiskid bar f2221, the second connector f2222, the second antiskid bar f2221 It is arranged radially in the outer wall of third residue outlet f213, and is set to the outer wall of third residue outlet f213 far from the first antiskid bar The side of f2211, the second antiskid bar f2221 are arranged close to third residue outlet f213, and it is anti-that the second connector f2222 is set to second One end of outer wall of the slide bar f2221 far from third residue outlet f213.Preferably, the length of the second antiskid bar f2221 is greater than first The length of antiskid bar f2211, the second antiskid unit f222 is stay bolt, convenient for buying, and it is at low cost.

Fixed cell f23 includes fixed part f231, a support column f232, fixing belt f233, hook portion f234, fixed part F231 is that a rod bending is formed, and fixed part f231 includes a third antiskid bar f2311, circular column f2312, third antiskid bar One end of f2311 is set to the outer wall of third residue outlet f213, and third antiskid bar f2311 is set close to third residue outlet f213 It sets, circular column f2312 is set to the other end of third antiskid bar f2311；

One end of support column f232 is connected to third antiskid bar f2311, and the other end of support column f232 is slagged tap far from third The outer wall of pipe f213 is arranged.

One end of fixing belt f233 is connected to fixed part f231, it is preferred that one end of fixing belt f233 passes through circular column F2312, and fixing belt f233 is fixed on circular column f2312；

Hook portion f234 is connected to the other end of fixing belt f233, and hook portion f234 is removably connected to the first antiskid bar f2211.Preferably, hook portion f234 is a metal crotch.

One end of decompression sweep-up pipe f3 is connected with the discharge end of screw conveyor f1, and the first residue outlet of connectivity part face F211 and screw conveyor f1 connectivity part；

It includes a rotor plate f41, a central axis f42, a threaded rod f43, one or two of attaching nut that air quantity, which adjusts component f4, F44, disk f45, central axis f42 radially can be rotated to be set on central axis f42 through decompression sweep-up pipe f3, rotor plate f41, And be set to outside decompression sweep-up pipe f3, rotor plate f41 circumferentially offers an arcuate socket along central axis f42, and the arcuate socket is in Mandrel f42 axially penetrates through rotor plate f41, and the one end threaded rod f43 passes through the arcuate socket of rotor plate f41 and is connected to decompression sweep-up pipe The outer wall of f3；Two attaching nut f44 are threadedly connected to the end of thread of threaded rod f43, and two attaching nut f44 difference respectively It is arranged close to the both ends of rotor plate f41；Disk f45 is built in decompression sweep-up pipe f3, and disk 45 is arranged radially in central axis On f42.

Screw conveyor f1 is not in setting decompression sweep-up pipe the case where blocking screw conveyor f1 in conveying dust F3 can reduce the air pressure at screw conveyor f1 discharge end, be convenient for dust impurities and air separation, convenient for dust through going out dirt component F2 enters snakeskin bag；By the way that the first antiskid bar f2211, the first connector f2212 is arranged, the sack of snakeskin bag can be hung over first On connector f2212, then snakeskin bag is fixed by fixing belt f233, hook portion f234, without manually holding always Snakeskin bag；By the way that the second antiskid bar f2221, the second connector f2222 is arranged, and the second antiskid bar f2221 is set to third and goes out Side of the outer wall of slag pipe f213 far from the first antiskid bar f2211, can further hook snakeskin bag, prevent snakeskin bag from sliding It falls；By the way that support column f232 is arranged, when snakeskin bag, which is fixed band f233, to be fixed on the second residue outlet f212, snakeskin can be strutted Bag, and limit snakeskin bag slide downward；By the way that circle body f214 is arranged, and circle body f214 is along the direction close to the second residue outlet f212 Diameter constantly becomes larger, and can strut the sack of snakeskin bag, and dust is facilitated to enter in snakeskin bag；By the way that third residue outlet f213 is arranged, And third residue outlet f213 constantly increases along the orient diameter far from the second residue outlet f212, dust can be facilitated to slag tap by third Pipe f213 will not get lodged in the discharge end of third residue outlet f213.

Primary dust removing device g includes air classifier g1, at least one first dust absorption fan g2, grey gas separation assembly g3, selection by winnowing Device g1 has feed inlet, discharge port, dust outlet；The air intake of first dust absorption fan g2 is connected with the dust outlet of air classifier g1 It is logical；

Grey gas separation assembly g3 includes connecting cylinder g31, grey gas separation member g32, multiple communicating pipe g33, inside connecting cylinder g31 Hollow, connecting cylinder g31 outer peripheral surface, which is recessed inwardly, is formed with air inlet, the air inlet of connecting cylinder g31 and the first dust absorption fan g2's Outlet air end is connected.

Grey gas separation member g32 includes the multiple first grey gas cylinder g321, multiple second grey gas cylinder g322, Duo Ge Three grey gas cylinder g323；Multiple first grey gas cylinder g321, the second grey gas cylinder g322, third ash gas cylinder g323 Respectively along the axial direction setting of screw conveyor f1, one end of the first grey gas cylinder g321 is connected with connecting cylinder g31, the other end It is connected with the feed end of screw conveyor f1；One end of second grey gas cylinder g322 is connected with connecting cylinder g31, the other end It is connected with the feed end of screw conveyor f1；One end of third ash gas cylinder g323 is connected with connecting cylinder g31, the other end It is connected with the second ash gas cylinder g322, and connectivity part is arranged close to screw conveyor f1；First grey gas cylinder g321, the The connectivity part of two grey gas cylinder g322, third ash gas cylinder g323 and connecting cylinder g31 are along the air intake far from connecting cylinder g31 The direction of mouth is set gradually.

Gas cylinder g321 grey with respect to first, the second grey gas cylinder g322, third ash gas divide multiple communicating pipe g33 respectively It is arranged from cylinder g323, is arranged in a one-to-one correspondence with corresponding first ash gas cylinder g321 communicating pipe g33, communicating pipe g33 and phase Corresponding second ash gas cylinder g322 is arranged in a one-to-one correspondence, communicating pipe g33 and corresponding third ash gas cylinder g323 mono- One is correspondingly arranged, the communicating pipe g33 corresponding first grey gas cylinder g321 of face, the second grey gas cylinder g322, third ash Gas cylinder g323 setting, and one end of communicating pipe g33 passes through connecting cylinder g31 inner wall, the other end of communicating pipe g33 is close to opposite The grey gas cylinder g321 of first answered, the second grey gas cylinder g322, third ash gas cylinder g323 setting, communicating pipe g33 Diameter gas cylinder g321 grey less than first, the second grey gas cylinder g322, third ash gas cylinder g323 are close to connecting cylinder g31 One end diameter.

Preferably, it the first grey gas cylinder g321, the second grey gas cylinder g322, third ash gas cylinder g323 and connect The connectivity part of cylinder g31 is set gradually along the direction of the air inlet port far from connecting cylinder g31；First grey gas cylinder g321, second Grey gas cylinder g322, third ash gas cylinder g323 constantly reduce along the orient diameter far from connecting cylinder g31, and the first grey gas Cylinder g321, the second grey gas cylinder g322, third ash gas cylinder g323 are close to the one end screw conveyor f1 gradually to spiral shell Revolve conveyer f1 inclination.

By primary dust removing device g it can be dusted again processing, further subtracted to by the grain after vibrating screen d Dust in few grain；Dust and air enter the first dust absorption fan g2 from the dust outlet of air classifier g1, and from the first dust suction Blower g2 enters in connecting cylinder g31, dust and air with certain speed impacts on communicating pipe g33 outer wall, can make dust and Air separation, dust move downward under gravity, upward motion of air, by grey gas separation member g32, make dust and sky The mixture of gas is separated through grey gas separation member g32, and enters screw conveyor f1 from grey gas separation member g32.

Two-stage dust removal device h includes intermediate tube h1, multiple first connecting tube h2, at least one return pipe h3, air quantity adjusting Valve h4,

First connecting tube h2 is arranged in a one-to-one correspondence with communicating pipe g33, and one end of the first connecting tube h2 is across connecting cylinder g31's Inner wall, and one end of the first connecting tube h2 inner wall for penetrating connecting cylinder g31 is connected to corresponding communicating pipe g33, the first connection The other end of the junction of pipe h2 and communicating pipe g33 close to communicating pipe g33 is arranged, the other end and middle tube of the first connecting tube h2 It is connected；

Return pipe h3 is arranged in a one-to-one correspondence with the first dust absorption fan g2, one end of return pipe h3 is connected with intermediate tube h1, The other end is connected with the air intake of corresponding the first dust absorption fan of wind g2；

Volume damper h4 is arranged in a one-to-one correspondence with return pipe h3, and volume damper h4 includes a rotating block h41, a connection Axis h42, a thread spindle h43, one or two of retainer nut h44, disk body h45, connecting shaft h42 radially rotatably run through return pipe H3, rotating block h41 are set on connecting shaft h42, and are set to outside return pipe h3, and rotating block h41 is circumferentially opened up along connecting shaft h42 There is an arcuate socket, the arcuate socket axially penetrates through rotating block h41 along connecting shaft h42, and the one end thread spindle h43 passes through rotating block h41 Arcuate socket and be connected to the outer wall of return pipe h3；Two retainer nut h44 are threadedly connected to the screw thread of thread spindle h43 respectively End, and two retainer nut h44 are arranged respectively close to the both ends of rotating block h41.Preferably, volume damper h4, return pipe h3 Quantity be two；Disk body h45 is built in return pipe h3, and disk body h45 is arranged radially on connecting shaft h42.

3-stage dust-removal device i includes at least one first cyclone separator i1, at least one second dust absorption fan i2, and first Cyclone separator i1 is arranged in a one-to-one correspondence with deslagging device e, and the first cyclone separator i1 includes the first dust removing tube being vertically arranged I11, the second dust removing tube i12, third dust removing tube i13, the 4th dust removing tube i14, the 5th dust removing tube i15, the first straight tube i16, first Dust removing tube i11, the second dust removing tube i12, third dust removing tube i13, the 4th dust removing tube i14, the 5th dust removing tube i15 are sequentially communicated, the One dust removing tube i11 is set on connecting cylinder g31 outer wall, and the first dust removing tube i11 outer peripheral surface offers an air inlet, the first dust removing tube I11 offers a venthole, the air inlet and the second dust absorption fan of the first dust removing tube i11 far from one end of the second dust removing tube i12 The outlet side of i2 is connected；The coaxially connected venthole inner wall in the first dust removing tube i11 of first straight tube i16, and the first straight tube i16 One end extend to the second dust removing tube i12；The air intake of second dust absorption fan i2 is connected with intermediate tube h1, the second dust absorption fan The outlet air end of i2 is connected with the air inlet of the first dust removing tube i11.

Preferably, the first dust removing tube i11 is square, and the second dust removing tube i12 is cylindrical；Third dust removing tube i13 is along separate The orient diameter of second dust removing tube i12 constantly becomes smaller；4th dust removing tube i14 is cylindrical, and the diameter of the 4th dust removing tube i14 is big In the diameter of the miner diameter end of third dust removing tube i13；5th dust removing tube i15 is continuous along the orient diameter far from the 4th dust removing tube i14 Become smaller, and the 5th dust removing tube i15 offers a relief hole far from one end of the 4th dust removing tube i14.

By the first cyclone separator i1, the second dust absorption fan i2, the dust in intermediate tube h1 is extracted out, passes through the first rotation Wind separator i1 handles the gas containing dust, can a large amount of processing enter the gas containing dust of intermediate tube h1；Wind Adjustable valve h4's is made of a little fairly simple parts, low manufacture cost, can adjust corresponding pipe by rotating block h41 The size of the wind flow in road is easy to use.

Level Four dust-extraction unit j includes at least one second cyclone separator j1, at least one first admission line j2, at least One third dust absorption fan j3, Boiler pressure control part j4, one end of the first admission line j2 is connected with intermediate tube h1.

Third dust absorption fan j3 is arranged in a one-to-one correspondence with the first admission line j2, third dust absorption fan j3 and the second whirlwind point It is arranged in a one-to-one correspondence from device j1, the inlet end of third dust absorption fan j3 is connected with the other end of corresponding first admission line j2 It is logical；

Second cyclone separator j1 includes the 6th dust removing tube j11, the 7th dust removing tube j12, the 8th dust removing tube j13, second straight Pipe j14, discharge component j15, the 6th dust removing tube j11 is set to first and removes on dirt barrel c41 outer wall, and the 6th dust removing tube j11 outer wall It is connected with third dust absorption fan j3 outer wall, the 6th dust removing tube j11, the 7th dust removing tube j12, the 8th dust removing tube j13 are vertically arranged And be sequentially communicated, the 6th dust removing tube j11 outer peripheral surface offers an air inlet, and the 6th dust removing tube j11 is far from the 7th dust removing tube j12's One end offers a venthole, and the air inlet of the 6th dust removing tube j11 is connected with the outlet side of third dust absorption fan j3；Discharging group Part j15 includes two scum pipe j151, and two scum pipe j151 are located at the two sides of the 8th dust removing tube j13 and symmetrically set Set, one end of two scum pipe j151 is connected with the slag output end of the 8th dust removing tube j13, the other end of a scum pipe j151 with 4th is connected except dirt barrel c44, and connectivity part is set to the 4th one end except dirt barrel c44 close to third except dirt barrel c43, Ling Yipai The other end of slag pipe j151 is connected with the second residue outlet f212, and scum pipe j151 and the connectivity part of the second residue outlet f212 are leaned on Nearly retaining ring e14 setting, scum pipe j151 constantly become smaller along the orient diameter far from the 8th dust removing tube j13.

Preferably, the 6th dust removing tube j11 is square, and the 7th dust removing tube j12 is cylindrical；8th dust removing tube j13 is along separate The orient diameter of 7th dust removing tube j12 constantly becomes smaller, and the 8th dust removing tube j13 is offered far from one end of the 7th dust removing tube j12 One relief hole.

Boiler pressure control part j4 includes a support shaft j41, a rotatable lamella j42, a stud j43, two nut j44, circles Plate j45, support shaft j41 rotatably run through the first admission line j2, and rotatable lamella j42 is set on support shaft j41, and are set to Outside one admission line j2, rotatable lamella j42 circumferentially offers an arcuate socket, axial direction of the arcuate socket along support shaft j41 along support shaft j41 Through rotatable lamella j42, the one end stud j43 passes through arcuate socket and is connected to the first air inlet pipe j2 outer wall；Two nut j44 points It is not threadedly connected to stud j43, and two nut j44 are arranged respectively close to the both ends of rotatable lamella j42；Built in plectane j45 In the first admission line j2, and plectane j45 is arranged radially on support shaft j41.

The dust that second cyclone separator j1 is isolated is relatively fewer, by the way that discharge component j15 is arranged, by the 8th dust removing tube The dust of j13 discharge is sent to the 4th except dirt barrel c44, the second residue outlet f212 by two scum pipe j151 respectively, reduces grain The quantity of the slag notch of descaling machine reduces the quantity for needing the snakeskin bag being arranged.

Conveying device k is obliquely installed on car body a, and the feed end of conveying device k is set to the discharge port of air classifier g1 Underface.Preferably, conveying device k is belt conveyor.

Discharging dust-extraction unit l includes dust excluding hood l1, at least one cyclone dust collectors l2, the first dedusting fan l3, second removes Dirt blower l4, threeway admission line l5, two air quantity regulating part l6, dust excluding hood l1 include cover l11, middle hopper l12, discharging Struggle against l13, and cover l11 is set on car body a, and covers at the top of conveying device k, the one end of cover l11 far from conveying device k Offer an air suction opening, air suction opening runs through cover l11, the air suction opening of cover l11 be located at the discharge end of conveying device k just on Side；Middle hopper l12 is set on cover l11, and the discharge end of middle hopper l12 is being set to the feed end of conveying device k just Top；Discharge bucket l13 is set on cover l11, and discharge bucket l13 is set to the lower section of the discharge end of conveying device k, and discharge bucket The discharge end of the feed end face conveying device k of l13 is arranged；First dedusting fan l3 has one first air inlet, the second air inlet Mouth, air outlet, the first air inlet of the first dedusting fan l3 are connected with the air suction opening of cover l11.Preferably, discharge bucket l13 Constantly reduce along the direction size far from conveying device k.

Cyclone dust collectors l2 include the first settlement barrel l21 being vertically arranged, the second settlement barrel l22, third settlement barrel l23, 4th settlement barrel l24, the 5th settlement barrel l25, exhaust pipe l26, the first settlement barrel l21, the second settlement barrel l22, third sedimentation Cylinder l23, the 4th settlement barrel l24, the 5th settlement barrel l25 set gradually and are sequentially communicated vertically downwards, the first sedimentation The outer peripheral surface of cylinder l21 offers an air inlet, and the first settlement barrel l21 offers an outlet far from one end of the second settlement barrel l22 Hole, the inlet end of the first settlement barrel l21 are connected with the air outlet of the first dedusting fan l3；Second settlement barrel l22 is set to vehicle On body a；The coaxially connected venthole inner wall in the first settlement barrel l21 of exhaust pipe l26, and one end of exhaust pipe l26 is to Two settlement barrel l22 extend；The air outlet of first dedusting fan l3 is connected with the air inlet of the first settlement barrel l21.

Preferably, the first settlement barrel l21 is square, and the second settlement barrel l22 is cylindrical；Third settlement barrel l23 is along separate The orient diameter of second settlement barrel l22 constantly becomes smaller；4th settlement barrel l24 is cylindrical, and the diameter of the 4th settlement barrel l24 is big In the diameter of the miner diameter end of third settlement barrel l23；5th settlement barrel l25 is continuous along the orient diameter far from the 4th settlement barrel l24 Become smaller, and the 5th settlement barrel l25 offers a relief hole far from one end of the 4th settlement barrel l24.

Preferably, discharging dust-extraction unit l includes dust excluding hood l1, two cyclone dust collectors l2, the first dedusting fan l3, second Dedusting fan l4, threeway admission line l5, two air quantity regulating part l6, it is connected to air hose l7, two cyclone dust collectors l2 are set respectively It is placed in the two sides of car body a；It is connected to the both ends air inlet with the first settlement barrel l21 of two cyclone dust collectors l2 respectively of air hose l7 It is connected；First dedusting fan l3 be set to connection air hose l7 on, and the air outlet of the first dedusting fan l3 be connected to air hose l7 It is connected.

First dedusting fan l3 has the first air inlet, the second air inlet, gas outlet, the air outlet of the second dedusting fan l4 It is connected with connection air hose l7；

Threeway admission line l5 includes first pipe l51, second pipe l52, one end of first pipe l51 and the first dedusting The second air inlet of blower l3 is connected, the other end is connected with dust collecting f, and first pipe l51 and dust collection fill Set discharge end of the connectivity part close to dust collecting f of f；One end of second pipe l52 is connected, separately with first pipe l51 One end is connected with the first air inlet of the second dedusting fan l4；

One air quantity regulating part l6 is set on first pipe l51, and is arranged close to the first dedusting fan l3, another air quantity tune Section part l6 be set on second pipe l52, each air quantity regulating part l6 include a turntable l61, a shaft l62, a stud l63, One or two of fixture nut l64, round block l65, shaft l62 radially rotatably run through corresponding pipeline, and turntable l61, which is set to, to be turned It on axis l62, and is set to outside corresponding pipeline, turntable l61 circumferentially offers an arcuate socket, the arcuate socket along shaft l62 Turntable l61 is axially penetrated through along shaft l62, the one end stud l63 passes through the arcuate socket of turntable l61 and is connected to corresponding pipeline Outer wall；Two fixture nut l64 are threadedly connected to stud l63 respectively, and two fixture nut l64 are respectively close to turntable l61's Both ends setting；Round block l65 is built in corresponding pipeline, and round block l65 is arranged radially on shaft l62.Preferably, first Pipeline l51 is in Y type after being connected with second pipe l52.

By first pipe l51, second pipe l52 by the first dedusting fan l3, the second dedusting fan l4 simultaneously with decompression Sweep-up pipe f3 is connected, under the action of the first dedusting fan l3, the second dedusting fan l4, the gas that is mixed in screw conveyor f1 Body enters cyclone dust collectors l2 through decompression sweep-up pipe f3, the first dedusting fan l3, the second dedusting fan l4, after being dusted processing Discharge；Due to the gas contained in dust in screw conveyor f1 amount not necessarily, pass through air quantity regulating part l6, air quantity adjusting group Part f4 controls the size of the wind flow by corresponding pipeline, so that the suitable air of decompression sweep-up pipe f3 absorption is entered whirlwind and removes Dirt device l2；First pipe l51 is in Y type after being connected with second pipe l52, to the first dedusting fan l3, the second dedusting fan l4 Suction influence it is small.

The specific workflow of the utility model: grain is sent into feed hopper b, and grain is when falling into feed hopper b, a part Dust is under the action of dust hood c1, sweep-up pipe, the first blower c3, into cyclonic separation part c4, the mixing of dust and air Object removes dirt barrel c41 except the air inlet of dirt barrel c41 enters first from first, and blows and beats the dust edge on the first fixing pipe c46 outer wall Second falls downwards except dirt barrel c42, and through third except dirt barrel c43, the 4th are except dirt barrel c44, the 5th are except dirt barrel c45 feeding collecting bag It is interior.

Grain carries out grain and dust out of feed hopper b enters vibrating screen d shell d1 under the action of vibrating screen d The separation of impurity, dust impurities are entering deslagging device e from the slag notch of shell d1, when there is stalk to be stuck in shell d1, directly It connects and raises rubber pad d2, to clearing up in shell d1, prevent stalk from influencing the dedusting of subsequent grain.

Grain out of, the discharge port of shell d1 enters primary dust removing device g air classifier g1, air classifier g1 according to grain and The critical speed of dust has differences and opens grain and dust separation, and grain is discharged from the discharge port of air classifier g1, dust etc. Impurity then enters the first dust absorption fan g2 from the dust outlet of air classifier g1, enters under the action of the first dust absorption fan g2 and connects It in connect cylinder g31, and blows and beats on communicating pipe g33 outer wall, after dust enters connecting cylinder g31, most of dust is along the first grey gas point Tube wall from cylinder g321 is fallen downwards, and a part of dust is fallen downwards along the tube wall of the second grey gas cylinder g322, small there are also one Part dust falls into the slag output end of the second grey gas cylinder g322 along the tube wall of third ash gas cylinder g323, and dust is grey from first Gas cylinder g321, the second grey gas cylinder g322, third ash gas cylinder g323 fall into dust collecting f.

Dust enters spiral shell from the first grey gas cylinder g321, the second grey gas cylinder g322, third ash gas cylinder g323 It revolves in conveyer f1, send going out to screw conveyor f1 from the feed end of screw conveyor f1 under the action of screw conveyor f1 Expect end, and be discharged from dirt component f2 out, snakeskin bag is covered on third residue outlet f213, the sack of snakeskin bag hangs over the first connection Head f2212, on the second connector f2222, fixing belt f233 is circumferentially rotated around snakeskin bag, and hook portion f234 is hooked on the On one antiskid bar f2211, snakeskin bag is fixed to be completed, and dust is through the first residue outlet f211, the second residue outlet f212, third residue outlet F213 enters snakeskin bag and takes off hook portion f234 when snakeskin is packed to expire dust, unclamps fixing belt f233, removes snakeskin bag. Decompression sweep-up pipe f3 keeps the screw conveyor f1 outlet pressure drop of calming the anger that is connected with the first residue outlet f211 low, prevents from having settled Dust raises again；The adjustable size by depressurizing the air-flow of sweep-up pipe f3 of component f4 is adjusted by air quantity, conveniently at any time Regulation, and air quantity adjusts component f4 and is made of simple part once, manufacturing cost is low.

In connecting cylinder g31, gas is discharged from communicating pipe g33, but is mixed with dust from the gas that communicating pipe g33 blows out, and leads to The first connecting tube h2 is crossed, the gas for passing through communicating pipe g33 is extracted, gas is not pumped into intermediate tube under the action of the first connecting tube h2 In h1, the gas containing dust enters return pipe h3 from intermediate tube h1, and from return pipe h3 into the first dust absorption fan g2 into Gas end, it is for re-filtering into primary dust removing device g；By adjusting volume damper h4, control passes through the gas of return pipe h3 The size of flow.

Gas by return pipe h3 is excessive, will affect amount of the first dust absorption fan g2 from the air classifier g1 dust extracted out, 3-stage dust-removal device i is set, and the second dust absorption fan i2 extracts the admixture of gas in intermediate tube h1 and enters the first cyclone separator In i1.

The mixture of dust and air is blown and beaten straight first from the second dust absorption fan i2 into the first dust removing tube i11 On pipe i16 outer wall, dust is fallen downwards along the second dust removing tube i12, and through third dust removing tube i13, the 4th dust removing tube i14, the 5th Dust removing tube i15 is sent into collecting bag, and gas escapes outward from the first straight tube i16.

The mixture of setting level Four dust-extraction unit j, dust and air is from intermediate tube h1 through the first air inlet pipe j2, third dust suction Blower j3 enters in the second cyclone separator j1, and the mixture of dust and air enters the from the air inlet of the 6th dust removing tube j11 It in six dust removing tube j11, and blows and beats on the second straight tube j14 outer wall, dust is downward along the 7th dust removing tube j12, the 8th dust removing tube j13 It falls, and through respectively enteing the 4th except dirt barrel c44, deslagging device e, gas by the first residue outlet f211, the second residue outlet f212 Body escapes outward from the second straight tube j14；When the gas outlet of the first cyclone separator i1 has dust, Boiler pressure control part is controlled J4, increases the throughput for flowing through the first air inlet pipe j2, handles gas in a part of intermediate tube h1 by the second cyclone separator j1 Body can reduce the gas for flowing to the first cyclone separator i1, reduce the treating capacity of the first cyclone separator i1, make the first whirlwind point Dust is free of in gas from device i1 discharge.

Grain enters conveying device k through middle hopper l12 from the discharge port of air classifier g1, and conveying device k is belt conveying The feed end of machine is sent from the input terminal of belt conveyor to output end under the action of belt conveyor, and from belt conveyor Output end fall into discharge bucket l13, grain from centre bucket fall on belt conveyor when, not due to the weight of air and grain Consistent grain is fallen on belt conveyor, dust and grain separation, when grain falls into discharge bucket l13 from belt conveyor, powder Dirt and grain separation, due to the presence of cover l11, dust is under the action of air suction opening on cover l11, from the dust suction of cover l11 Hole enters the first dedusting fan l3, and enters connection air hose l7 from the first blower c3, enters two whirlwind from connection air hose l7 and removes In dirt device l2, the mixture of dust and air enters the first settlement barrel l21 from the air inlet of the first settlement barrel l21, and blows and beats On exhaust pipe l26 outer wall, dust is fallen downwards along the second settlement barrel l22, and through third settlement barrel l23, the 4th settlement barrel L24, the 5th settlement barrel l25 are sent into collecting bag；

First dedusting fan l3, the second dedusting fan l4 are connected with decompression sweep-up pipe f3 simultaneously, in the first dedusting fan Under the action of l3, the second dedusting fan l4, the gas being mixed in screw conveyor f1 is through depressurizing sweep-up pipe f3, the first dedusting fan L3, the second dedusting fan l4 enter cyclone dust collectors l2, are connected to decompression sweep-up pipe f3, the first dedusting by threeway admission line l5 Blower l3, the second dedusting fan l4 adjust the wind that component f4 control passes through corresponding pipeline by air quantity regulating part l6, air quantity The size of flow, and first pipe l51 be connected with second pipe 152 after in Y type, to the first dedusting fan l3, the second dedusting The influence of blower l4 is small.

Vibrating screen d's is discharged into feed pipe e11, dust and impurity from feed pipe from the slag output end of shell d1 for dust and impurity E11, discharge nozzle e12, hollow tube e13 enter in snakeskin bag, and dust is passed through pipeline from the 5th dust removing tube by 3-stage dust-removal device i I15 is discharged into discharge nozzle e12, is entered in snakeskin bag from discharge nozzle e12, hollow tube e13, and level Four dust-extraction unit j is by a part of powder Dirt is discharged into discharge nozzle e12 by scum pipe j151, is entered in snakeskin bag from discharge nozzle e12, hollow tube e13；Snakeskin bag is covered On discharge nozzle e12, the sack of snakeskin bag is hung on the first anti-slippery fellow e212, the second anti-slippery fellow e222, by elastic binding tape e33 Circumferentially rotated around snakeskin bag, and hooking part e34 be hooked on first connecting rod e211, snakeskin bag is fixed to be completed, dust pass through into Expects pipe e11, discharge nozzle e12, hollow tube e13 enter snakeskin bag and take off hook portion f234 when snakeskin is packed to expire dust, unclamp bullet Property binding tape e33, removes snakeskin bag.

Embodiment two:

Something in common is not illustrating that embodiment two and embodiment one are the difference is that charging dust-extraction unit c, charging remove Dirt device c includes a dust hood c1, three the first sweep-up pipe c2, two one the first blower c3, two cyclonic separation part c4, connects Air duct c5.

Two the first cyclone separator i1 are respectively arranged on car body a, and are distributed in the two sides of feed hopper b, the first whirlwind Separator i1 includes that first be vertically arranged removes dirt barrel c41, second except dirt barrel c42, third are except dirt barrel c43, the 4th are except dirt barrel C44, the 5th remove dirt barrel c45, the first fixing pipe c46, and first except dirt barrel c41, second are except dirt barrel c42, third are except dirt barrel c43, the Four are sequentially communicated except dirt barrel c44, the 5th remove dirt barrel c45, and first is set on car body a except dirt barrel c41, and first in addition to dirt barrel c41 Circumferential surface offers an air inlet, and first offers a venthole except the one end for removing dirt barrel c42 far from second dirt barrel c41；First is solid Determine the coaxially connected venthole inner wall that dirt barrel c41 is removed in first of pipe c46, and dirt barrel is removed to second in one end of the first fixing pipe c46 C42 extends.

Preferably, close to second except dirt barrel c42 is arranged, second is straight except dirt barrel c42 for the end face of one end of the first fixing pipe c46 Diameter is greater than the first fixing pipe c46 diameter.

Dust hood c1 is set on feed hopper b；One end of three the first sweep-up pipe c2 is each passed through the inner wall of dust hood c1, It is respectively the two sides and top of the first sweep-up pipe c2 across place；The other end of two the first sweep-up pipe c2 and one first blower c3's Air intake is connected, and the other end of another first sweep-up pipe c2 is connected with the air intake of another first blower c3；First blower C3 is arranged in a one-to-one correspondence with the first cyclone separator i1, and the first blower c3 is set to the of corresponding first cyclone separator i1 One except on dirt barrel c41, connection air hose c5 is connected with the outlet air end of two the first blower c3, and connects air hose c5 and two first The first of cyclone separator i1 is connected except the air inlet of dirt barrel c41.

Specific embodiment of the present utility model described above does not constitute the restriction to scope of protection of the utility model. Any other various changes and modifications that any technical concept according to the present utility model is made should be included in practical In novel scope of protection of the claims.

Claims (5)

1. a kind of grain separator with level Four dust-extraction unit, which is characterized in that including vibrating screen, primary dust removing device, second level Dust-extraction unit, 3-stage dust-removal device, level Four dust-extraction unit；The primary dust removing device includes air classifier, at least one first suction Dirt blower, grey gas separation assembly, the air classifier have a feed inlet, discharge port, dust outlet, the feed inlet of the air classifier with The discharge port of the vibrating screen is connected；The air intake of first dust absorption fan is connected with the dust outlet of the air classifier It is logical；The ash gas separation assembly includes connecting cylinder, grey gas separation member, multiple communicating pipes, the connecting cylinder boring, the company Connect cylinder outer peripheral surface, which is recessed inwardly, is formed with air inlet, the outlet air end phase of the air inlet of the connecting cylinder and first dust absorption fan The inlet end of connection, the ash gas separation member is connected with the connecting cylinder；The communicating pipe is connected with the connecting cylinder；Institute Stating two-stage dust removal device includes intermediate tube, multiple first connecting tubes, return pipe, and one end of first connecting tube is connected to described Be connected to pipe outer wall, and first connecting tube is connected with the communicating pipe, the other end of first connecting tube with it is described in Between pipe be connected；One end of the return pipe is connected with the intermediate tube, the air inlet of the other end and first dust absorption fan End is connected；The 3-stage dust-removal device includes at least one first cyclone separator, at least one second dust absorption fan, described First cyclone separator has air inlet, gas outlet, slag notch, the air intake of second dust absorption fan and the intermediate tube phase Connection, the outlet air end of second dust absorption fan are connected with the air inlet of first cyclone separator；The level Four dedusting Device includes at least one second cyclone separator, at least one first admission line, at least one Boiler pressure control part, at least one One end of a third dust absorption fan, first admission line is connected with the intermediate tube, the Boiler pressure control part with it is described First admission line is arranged in a one-to-one correspondence, and the Boiler pressure control part is set to first admission line, passes through institute for controlling State the throughput size of the first admission line；The other end of the inlet end of the third dust absorption fan and first admission line It is connected, the outlet side of the third dust absorption fan is connected with the air inlet of second cyclone separator.

2. the grain separator according to claim 1 with level Four dust-extraction unit, which is characterized in that the Boiler pressure control part Including a support shaft, a rotatable lamella, a stud, two nuts, plectanes, the support shaft rotatably run through described first into Feed channel, the rotatable lamella are set in the support shaft, and are set to outside first admission line, and the rotatable lamella is along institute State support shaft and circumferentially offer an arcuate socket, the arcuate socket along the support shaft the rotatable lamella that axially penetrates through, it is described double Hook bolt one end passes through the arcuate socket and is connected to the outer wall of first admission line；Two nut difference screw threads connect It is connected to the stud, and two nuts are arranged respectively close to the both ends of the rotatable lamella；The plectane is built in institute The first admission line is stated, and the plectane is arranged radially in the support shaft.

3. the grain separator according to claim 1 with level Four dust-extraction unit, which is characterized in that first whirlwind point It include the first dust removing tube being vertically arranged, the second dust removing tube, third dust removing tube, the 4th dust removing tube, the 5th dust removing tube, first from device Straight tube, first dust removing tube, the second dust removing tube, third dust removing tube, the 4th dust removing tube, the 5th dust removing tube are sequentially communicated, described First dust removing tube is set on the connection drum outer wall, and the first dust removing tube outer peripheral surface offers an air inlet, and described first Dust removing tube offers a venthole far from one end of the second dust removing tube；First straight tube is coaxially connected in first dust removing tube Venthole inner wall, and one end of first straight tube extends to second dust removing tube.

4. the grain separator according to claim 1 with level Four dust-extraction unit, which is characterized in that second whirlwind point It include the 6th dust removing tube, the 7th dust removing tube, the 8th dust removing tube, the second straight tube from device, the 6th dust removing tube is set to described the On one dedusting drum outer wall, and the 6th dedusting pipe outer wall is connected with the third dust absorption fan outer wall, the 6th dedusting Pipe, the 7th dust removing tube, the 8th dust removing tube are vertically arranged and are sequentially communicated, and the 6th dust removing tube outer peripheral surface offers an air inlet Mouthful, the 6th dust removing tube offers a venthole far from one end of the 7th dust removing tube, the air inlet of the 6th dust removing tube with The outlet side of the third dust absorption fan is connected.

5. the grain separator according to claim 4 with level Four dust-extraction unit, which is characterized in that the 6th dust removing tube It is square, the 7th dust removing tube is cylindrical；Orient diameter of the 8th dust removing tube edge far from the 7th dust removing tube is not It is disconnected to become smaller, and the 8th dust removing tube offers a relief hole far from one end of the 7th dust removing tube.