CN108910427A - Screw conveyor and biomass gasification system - Google Patents
Screw conveyor and biomass gasification system Download PDFInfo
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- CN108910427A CN108910427A CN201810792029.6A CN201810792029A CN108910427A CN 108910427 A CN108910427 A CN 108910427A CN 201810792029 A CN201810792029 A CN 201810792029A CN 108910427 A CN108910427 A CN 108910427A
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- 238000002309 gasification Methods 0.000 title claims abstract description 50
- 239000002028 Biomass Substances 0.000 title claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 5
- 230000003247 decreasing effect Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 description 66
- 238000007596 consolidation process Methods 0.000 description 15
- 230000009471 action Effects 0.000 description 14
- 239000007789 gas Substances 0.000 description 13
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 12
- 230000000694 effects Effects 0.000 description 8
- 238000003780 insertion Methods 0.000 description 7
- 230000037431 insertion Effects 0.000 description 7
- 241000196324 Embryophyta Species 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 244000005700 microbiome Species 0.000 description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000000567 combustion gas Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 235000013305 food Nutrition 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002154 agricultural waste Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 235000012550 Pimpinella anisum Nutrition 0.000 description 1
- 240000004760 Pimpinella anisum Species 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G33/00—Screw or rotary spiral conveyors
- B65G33/24—Details
- B65G33/26—Screws
- B65G33/265—Screws with a continuous helical surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G33/00—Screw or rotary spiral conveyors
- B65G33/08—Screw or rotary spiral conveyors for fluent solid materials
- B65G33/14—Screw or rotary spiral conveyors for fluent solid materials comprising a screw or screws enclosed in a tubular housing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Screw Conveyors (AREA)
Abstract
The present invention relates to a kind of screw conveyor and biomass gasification systems.The screw conveyor includes：Body offers inlet port and outlet port；Screw assembly includes shaft, the first helical blade and the second helical blade, shaft extends to discharge port from feed inlet, first helical blade and the second helical blade are affixed with shaft and extend spirally around the shaft, one end of first helical blade is close to feed inlet, one end of the other end and the second helical blade is affixed, the other end of second helical blade extends close to discharge port, the outer diameter of second helical blade less than the first helical blade outer diameter, the second helical blade close to one end of the first helical blade screw pitch be greater than its one end far from the first helical blade screw pitch；Discharge nozzle is connected to discharge port and extends towards the direction far from body, and the interior of discharge nozzle is gradually reduced close to one end of discharge port to one end far from discharge port without leave.Above-mentioned screw conveyor can be effectively prevented from gas leakage or the gas blowby of gasification furnace.
Description
Technical field
The present invention relates to conveying device technical field, in particular to a kind of screw conveyor and biomass gasification system.
Background technique
The biomass resource in China is abundant, including various plants, microorganism, using plant or microorganism as the animal of food and
Its waste etc. produced.Such as crops, agricultural waste material, timber and timber waste etc..Currently, main by that will give birth to
Substance is conveyed into the combustion gas for burning and generating aniseed in gasification furnace, to realize that the high efficient energy sourcesization of biomass utilize.
Screw conveyor mainly elapses material by thread-whirling, to realize that material conveys purpose.Work as helical feed
When machine is to gasification furnace feeding, need to make the discharge port of screw conveyor to protrude into gasification furnace.Due to conventional screw conveyor
Discharge port does not have seal approach, when it gives gasification furnace feeding, is influenced by furnace high-temperature and positive pressure, leads to the gas of gasification furnace
Body is able to enter in the material gap of screw conveyor, is caused gasification furnace to leak air or the phenomenon that gas blowby, is influenced gasification furnace
It operates normally.
Summary of the invention
Based on this, it is necessary to provide a kind of screw conveyor and biomass gasification system.The screw conveyor has from close
Effect is sealed, gas leakage or the gas blowby of gasification furnace can be effectively prevented from.
A kind of screw conveyor, including：
Body offers inlet port and outlet port；
Screw assembly, is rotatably contained in the body, and the screw assembly includes shaft, the first helical-blade
Piece and the second helical blade, the shaft can rotate, and the shaft extends to the discharge port from the feed inlet, and described
One helical blade and second helical blade are affixed with the shaft, first helical blade and second helical-blade
Piece is extended spirally around the shaft, and one end of first helical blade is close to the feed inlet, the other end and described second
One end of helical blade is affixed, and the other end of second helical blade extends close to the discharge port, second spiral
The outer diameter of blade be less than first helical blade outer diameter, second helical blade be variable-pitch propeller blade, described second
Screw pitch of the helical blade close to one end of first helical blade is greater than second helical blade far from first spiral
The screw pitch of one end of blade；And
Discharge nozzle, one end and the body are affixed, and are connected to the discharge port, and the other end is towards far from the tube body
The direction of component extends, the discharge nozzle it is interior without leave close to one end of the discharge port to one end of the separate discharge port by
It is decrescence small.
First helical blade of above-mentioned screw conveyor is arranged close to feed inlet, so that material enters tube body group through feed inlet
It, can be directly under the action of the first helical blade along axial conveying after part；The outer diameter of second helical blade is less than the first spiral
The outer diameter of blade when so that material being delivered to the second helical blade, is tentatively squeezed under the action of outer diameter difference and becomes tight
It is real；Since the second helical blade is variable-pitch propeller blade, screw pitch of second helical blade close to one end of the first helical blade is big
Screw pitch in the one end of the second helical blade far from the first helical blade, so that material is defeated defeated under the action of the second helical blade
During sending, further squeezed under the action of pitch difference and more consolidation；Since discharge nozzle is connected to discharge port,
The interior of discharge nozzle is gradually reduced close to one end of discharge port to one end far from discharge port without leave, so that material is through the second helical-blade
Piece is delivered in discharge nozzle, by the extruding again and unusual consolidation under the internal diameter effect of discharge nozzle gradual change；By multiple
Squeeze so that the material in discharge nozzle be extruded unusual consolidation, avoid between material that there are gaps, when discharge nozzle protrudes into
When gasification furnace, the gas in gasification furnace cannot penetrate the material of compression, and then avoid because the discharge port of screw conveyor does not have
Seal approach and gas leakage or the gas blowby for leading to gasification furnace, guarantee the normal operation of gasification furnace.
First helical blade is isometric helix blade in one of the embodiments, second helical blade
The one end of screw pitch Zi close to one end of first helical blade to close to discharge port is gradually reduced.
Second helical blade is isometrical helical blade in one of the embodiments, second helical blade
The one end of screw pitch Zi close to one end of first helical blade to close to discharge port is successively decreased with preset value equal difference, the preset value
It is 1 with the ratio between the outer diameter of second helical blade:60~1:30.
First helical blade is isometric helix blade, the second helical blade packet in one of the embodiments,
Include the sequentially connected first helical-blade segment of extending direction, the second helical-blade segment and the third helical blade along the shaft
Section, the one end of the first helical-blade segment far from the second helical-blade segment and first helical blade are affixed, described
First helical-blade segment, the second helical-blade segment and the third helical-blade segment are isometric helix blade sections, described
The screw pitch of first helical-blade segment is equal with the screw pitch of first helical blade, and the first helical-blade segment, described
The screw pitch of two helical-blade segments and the third helical-blade segment is sequentially reduced.
The body includes tube body and connecting tube in one of the embodiments, and the tube body includes being sequentially communicated
The first pipeline section, the second pipeline section and third pipeline section, the feed inlet is opened in first pipeline section, and first pipeline section is isometrical
Pipe, the interior of second pipeline section gradually subtract close to one end of first pipeline section to one end far from first pipeline section without leave
Small, the third pipeline section is equal pipe, and the internal diameter of the third pipeline section is less than the internal diameter of first pipeline section, the connecting tube with
The third pipeline section is connected to far from one end of second pipeline section, and the connecting tube is equal pipe, and the internal diameter of the connecting tube
Equal with the internal diameter of the third pipeline section, the discharge port is opened in the one end of the connecting tube far from the third pipeline section, institute
It states spindle portion and is contained in the tube body, and be partially housed in the connecting tube, first helical blade is contained in described
In one pipeline section, second spiraling vane portions are contained in second pipeline section, and are partially housed in the third pipeline section,
And be partially housed in the connecting tube, the one end of one end of the discharge nozzle and the connecting tube far from the third pipeline section is solid
It connects.
The ratio between internal diameter of the third pipeline section and first pipeline section is 28 in one of the embodiments,：35~31：
35。
First helical blade is isometrical helical blade in one of the embodiments, and second helical blade is
The ratio between outer diameter of isometrical helical blade, second helical blade and first helical blade is 28：35~31：35.
The ratio between internal diameter maxima and minima of the discharge nozzle is 2 in one of the embodiments,：1~6：5.
It in one of the embodiments, further include driving device, the driving device is connect with the rotating shaft transmission, so that
The driving device can drive the shaft to rotate.
The driving device is fluid pressure drive device in one of the embodiments,.
A kind of biomass gasification system, including the described in any item screw conveyors of above-described embodiment and gasification furnace, it is described
Gasification furnace is connected to the discharge nozzle far from one end of the body.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the screw conveyor of first embodiment；
Fig. 2 is that screw conveyor shown in FIG. 1 omits the structural schematic diagram after bearing block and first bearing；
Fig. 3 is that the screw conveyor of second embodiment omits the structural schematic diagram after bearing block and first bearing.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give preferred embodiment of the invention.But the invention can be realized in many different forms, however it is not limited to herein
Described embodiment.On the contrary, purpose of providing these embodiments is keeps the understanding to the disclosure more saturating
It is thorough comprehensive.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.
As shown in Figure 1, the biomass gasification system of first embodiment, including screw conveyor 10 and gasification furnace.Spiral
Conveyer 10 is for conveying material into gasification furnace, so that material can be conveyed into gasification furnace through screw conveyor 10 and be converted
For combustion gas.In a wherein embodiment, material is made a living material class material, such as can be various plants, microorganism, to plant
Object or microorganism are the animal of food or using plant or microorganism as the waste of the animal productiong of food.Specifically, material is
Crops, agricultural waste material, timber or timber waste etc.
Screw conveyor 10 includes fixation kit 100, body (figure is not marked), screw assembly (figure is not marked), discharge nozzle
400, insertion pipe 500 and driving device (not shown).
Fixation kit 100 includes pedestal 110, support 120 and bearing block 130.Support 120 is fixed on the surface of pedestal 110
On.Bearing block 130 is fixed on pedestal 110 on the surface of support 120, and the setting of the interval of support 120.
In the shown embodiment, the substantially bar shaped plate of pedestal 110.Support 120 is two, and two supports 120 are the bottom of along
The extending direction of seat 110 is alternatively arranged.And one in two supports 120 is arranged close to one end of pedestal 110.Bearing block 130
It is two, two bearing blocks 130 are alternatively arranged along the extending direction of pedestal 110.A close pedestal in two bearing blocks 130
110 the other end setting, another in two supports 120 another setting.
Body and support 120 are affixed, so that support 120 supports body.Body includes tube body 210, connects
Adapter tube 230 and connecting shaft 250.
Tube body 210 and support 120 are affixed, so that support 120 supports tube body 210.In illustrated embodiment, tube body 210
The extending direction of extending direction and pedestal 110 is substantially parallel, and tube body 210 and two supports 120 are affixed.
Further, tube body 210 includes sequentially connected first pipeline section 211, the second pipeline section 213 and third pipeline section 215.?
Illustrated embodiment, the first pipeline section 211 are equal pipe.First pipeline section 211 and the support 120 close to bearing block 130 are affixed, and position
In the side of the support 120 far from pedestal 110.Second pipeline section 213 it is interior without leave close to one end of the first pipeline section 211 to far from the
One end of one pipeline section 211 is gradually reduced.Third pipeline section 215 is equal pipe.The branch of third pipeline section 215 and close 110 one end of pedestal
Seat 120 is affixed, and is located at the side of the support 120 far from pedestal 110.The internal diameter of third pipeline section 215 is less than the first pipeline section 211
Internal diameter.
In a wherein embodiment, the ratio between internal diameter of third pipeline section 215 and the first pipeline section 211 is 28：35~31：
35。
Body offers feed inlet 220.Further, feed inlet 220 is opened in the first pipeline section 211.It is real in diagram
It applies in mode, the substantially straight-tube shape of feed inlet 220.One end of feed inlet 220 is connected to the outer peripheral surface of the first pipeline section 211, and position
In the first side of the pipeline section 211 far from support 120.
In a wherein embodiment, the length ratio of the internal diameter of feed inlet 220 and the first pipeline section 211 is 7:10~1:
1.By be arranged the wider feed inlet 220 of internal diameter, make it possible to once put into more material, and enable material as early as possible into
Enter in the second pipeline section 213, to avoid feed blocking feed inlet 220.
Connecting tube 230 is connected to third pipeline section 215 far from one end of the second pipeline section 211.Connecting tube 230 is equal pipe, even
The internal diameter of adapter tube 230 is equal with the internal diameter of third pipeline section 215.In the shown embodiment, connecting tube 230 is flanged fitting.Even
The extending direction of adapter tube 230 and the extending direction of tube body 210 are substantially parallel.Connecting tube 230 and third pipeline section 215 are far from the second pipe
One end of section 213 is connected to and flanged joint.
Body offers discharge port (not shown).In the shown embodiment, discharge port opens up remote with connecting tube 230
One end from third pipeline section 215.
Connecting shaft 250 can be partially housed in tube body 210, and connecting shaft 250 can rotate.Further, connecting shaft
250 are rotationally arranged in bearing block 130 and the first pipeline section 211.In the shown embodiment, the extending direction of connecting shaft 250 with
The extending direction of tube body 210 is substantially parallel.Connecting shaft 250 successively wears two bearing blocks 130, the first pipeline section 211 far from second
One end of pipeline section 213, and be rotatablely connected with the first pipeline section 211.
Further, screw conveyor 10 further includes first bearing (not shown), second bearing (not shown) and bearing end
Lid 600.First bearing is fixedly contained in bearing block 130.Tube body 210 further includes the 4th pipeline section 217.4th pipeline section 217
It is connected in the one end of the first pipeline section 211 far from the second pipeline section 213, and with the first pipeline section 211.Second bearing is fixedly contained in
In four pipeline sections 217.Bearing (ball) cover 600 is covered on the one end of second bearing close to first bearing.Connecting shaft 250 successively wears first
Bearing, bearing (ball) cover 600 and second bearing and be partially housed in the first pipeline section 211.
In the shown embodiment, first bearing is two, and two first bearings are respectively fixedly contained in two first
In bearing block 130.Connecting shaft 250 successively wears two first bearings, bearing (ball) cover 600 and second bearing and is partially housed in
One pipeline section 211.
Referring to Figure 2 together, screw assembly is rotatably contained in body.Screw assembly includes shaft 310,
One helical blade 320 and the second helical blade 330.
Shaft 310 can rotate, and shaft 310 extends to discharge port from feed inlet 310.In the shown embodiment, shaft
The extending direction of 310 extending direction and tube body 210 is substantially parallel.Shaft 310 is partially housed in tube body 210, and part is received
It is dissolved in connecting tube 230.Shaft 310 is affixed close to one end of the first pipeline section 211 with connecting shaft 250, so that connecting shaft 250 can
Shaft 310 is driven to rotate.
Shaft 310 is equipped with barrier sheet 311.The outer peripheral surface of 311 twisted rotary shaft 310 of barrier sheet is arranged one week, and is located at shaft
310 close to one end of connecting shaft 250.By the way that barrier sheet 311 is arranged, enter after body to avoid material to close to connecting shaft
250 direction is mobile and influences the rotation of connecting shaft 250.
First helical blade 320 and shaft 310 are affixed, and 310 extend spirally around the shaft.The one of first helical blade 320
It holds and is arranged close to feed inlet 220.By the way that the first helical blade 320 is arranged close to feed inlet 220, so that material is through feed inlet
It, can be directly under the action of the first helical blade 320 along axial conveying after 220 enter body.Further, the first spiral shell
Vane piece 320 is isometric helix blade.In the shown embodiment, the first helical blade 320 is isometrical isometric helix blade.The
One helical blade 320 is contained in the first pipeline section 211.
Second helical blade 330 and shaft 310 are affixed, and 310 extend spirally around the shaft.The one of second helical blade 330
End is affixed with first one end of helical blade 320 far from feed inlet 220, and the other end extends close to discharge port.Second helical-blade
Outer diameter of the outer diameter of piece 330 less than the first helical blade 320.When material is delivered to the second helical-blade from the first helical blade 320
When piece 330, material is tentatively squeezed under the action of outer diameter difference and becomes consolidation.Further, the second helical blade be etc.
Diameter helical blade.
In a wherein embodiment, the ratio between outer diameter of the second helical blade 330 and the first helical blade 320 is 28：
35~31：35.
Second helical blade 330 is variable-pitch propeller blade.Second helical blade 330 close to the first helical blade 320 one
The screw pitch at end is greater than the screw pitch of the one end of the second helical blade 330 far from the first helical blade 320.When material is in the second helical-blade
During conveying under the action of piece 330, material is further squeezed under the action of pitch difference and becomes more consolidation.
In a wherein embodiment, the screw pitch of the second helical blade 330 is certainly close to one end of the first helical blade 320
It is gradually reduced to one end close to discharge port.Since the screw pitch of the second helical blade 330 is gradually reduced, so that material is in the second spiral shell
It is squeezed in the transmission process of vane piece 330 by continuous several times, and the more consolidation for enabling material to be extruded.Further,
The one end of the screw pitch of second helical blade 330 Zi close to one end of the first helical blade 320 to close to discharge port is with preset value etc.
Difference is successively decreased.Since the screw pitch equal difference of the second helical blade 330 is successively decreased, so that transmission process of the material in the second helical blade 330
It is middle to be squeezed step by step by continuous several times, further material is compressed.Further, the second helical blade 330 is isometrical spiral
The ratio between outer diameter of blade, preset value and the second helical blade 330 is 1:60~1:30.Under this ratio, be conducive to material pressure
Tightly.
Second helical blade 330 is contained in tube body 210.In the shown embodiment, 330 part of the second helical blade is received
It is dissolved in the second pipeline section 213, and is partially housed in third pipeline section 215, and is partially housed in connecting tube 230.
One end of discharge nozzle 400 and body are affixed, and are connected to discharge port, the other end towards far from body side
To extension.The interior of discharge nozzle 400 is gradually reduced close to one end of discharge port to one end far from discharge port without leave.When material is through
Two helical blades 330 are delivered in discharge nozzle 400,400 gradual change of discharge nozzle internal diameter effect under by extruding again and
Become very consolidation.
Further, the extending direction of discharge nozzle 400 and the extending direction of connecting tube 230 are substantially parallel.Discharge nozzle 400
The one end of one end with connecting tube 230 far from third pipeline section 215 is affixed.In the shown embodiment, discharge nozzle 400 and connecting tube
The 230 end flange connections far from third pipeline section 215.By setting flanged fitting for connecting tube 230, connect connecting tube 230
Expects pipe 400 and third pipeline section 215 are picked out, and is dissolved in 330 part of the second helical blade in connecting tube 230, convenient for passing through disassembly
Connecting tube 230, and shaft 310 and each helical blade are repaired and safeguarded.
In a wherein embodiment, the ratio between internal diameter maxima and minima of discharge nozzle 400 is 2：1~6：5.
Insertion pipe 500 is connected to and is tightly connected far from one end of body with discharge nozzle 400.Insertion pipe 500 can be with
Gasification furnace connection and sealed connection, so that material can be delivered in gasification furnace through screw conveyor 10.In illustrated embodiment
In, insertion pipe 500 is an integral molding structure with discharge nozzle 400.
Driving device and shaft 310 are sequentially connected, so that driving device being capable of the rotation of drive shaft 310.Implement in diagram
In mode, driving device is fluid pressure drive device.By making driving device be set as fluid pressure drive device, make it possible to permanent torsion
Square is continuously and smoothly fed, additionally it is possible to realize that the real-time positive and negative rotation of screw conveyor 10 switches, will not because helical blade is stuck and
Driving device is caused to be damaged.
Further, body further includes shaft coupling 260.Shaft coupling 260 and connecting shaft 250 far from shaft 310 one
It holds affixed.Driving device and shaft coupling 260 are sequentially connected, so that driving device can drive shaft coupling 260 to rotate and the company of drive
Spindle 250 rotates, to drive shaft 310 to rotate.
Gasification furnace is connected to discharge nozzle 400 far from one end of body.In the shown embodiment, 500 energy of insertion pipe
It is enough to be hermetically inserted in gasification furnace, so that material can be delivered in gasification furnace through screw conveyor 10.
The biomass gasification system of first embodiment use process is as follows：
Insertion pipe 500 is hermetically inserted in gasification furnace.Driving device is opened, shaft 310 is rotated；From feed inlet
220 be added materials, material enter the first pipeline section 211 after under the action of the first helical blade 320, be delivered to the second pipeline section 213；
Then material continues axial conveying under the effect of the second helical blade 330, and in the work of outer diameter difference and the inner wall of the second pipeline section 213
It is tentatively squeezed with lower, material is successively delivered in third pipeline section 215 and connecting tube 230；Material in connecting tube 230 by
The extruding of second helical blade 330 and further compress, and be transported in discharge nozzle 400, material in discharge nozzle 400 again
It squeezes and avoids between material that there are gaps；Then material flows through insertion pipe 500 and enters in gasification furnace, and in gasification furnace
It burns and forms combustion gas.
The biomass gasification system of first embodiment at least has the following advantages that：
(1) in the screw conveyor 10 of the biomass gasification system of first embodiment, the first helical blade 320 close into
Material mouth 220 be arranged so that material through feed inlet 220 enter body after, can be directly in the effect of the first helical blade 320
Lower edge axially conveys；The outer diameter of second helical blade 330 less than the first helical blade 320 outer diameter so that material is delivered to
When two helical blades 330, is tentatively squeezed under the action of outer diameter difference and become consolidation；Since the second helical blade 330 is
Variable-pitch propeller blade, screw pitch of second helical blade 330 close to one end of the first helical blade 320 are greater than the second helical blade
The screw pitch of 330 one end far from the first helical blade 320 conveys under the action of the second helical blade 330 so that material is defeated
In the process, further squeezed under the action of pitch difference and more consolidation；Since discharge nozzle 400 is connected to discharge port,
The interior of discharge nozzle 400 is gradually reduced close to one end of discharge port to one end far from discharge port without leave, so that material is through the second spiral shell
Vane piece 330 is delivered in discharge nozzle 400, by extruding again under the internal diameter effect of 400 gradual change of discharge nozzle；Through excessive
It is secondary to squeeze so that the very consolidation that the material in discharge nozzle 400 is extruded, avoiding storeroom, there are gaps, work as discharge nozzle
400 when protruding into gasification furnace, and the gas in gasification furnace not can enter in the material of compression, and then avoids the gas leakage of gasification furnace or alter
Gas guarantees the normal operation of gasification furnace.
(2) internal diameter and first of the feed inlet 220 of the screw conveyor 10 of the biomass gasification system of first embodiment
The length ratio of pipeline section 211 is 7:10~1:1.By the way that the wider feed inlet 220 of internal diameter is arranged, make it possible to once put into more
Material, and enable material as early as possible enter the second pipeline section 213 in, to avoid feed blocking feed inlet 220.
(3) in the screw conveyor 10 of the biomass gasification system of first embodiment, the internal diameter of the second pipeline section 213 is gradually
Reduce, and the internal diameter of third pipeline section 215 is less than the internal diameter of the first pipeline section 211, so that material enters the second pipeline section through feed inlet 220
In 213, not only by the effect of diameter difference, is also squeezed by the inner wall of the second pipeline section 213, material is extruded more
Tightly.
(4) in the screw conveyor 10 of the biomass gasification system of first embodiment, the screw pitch of the second helical blade 330
It is gradually reduced from one end close to the first helical blade 320 to one end close to discharge port.Due to the spiral shell of the second helical blade 330
Away from being gradually reduced, so that material squeezes in the transmission process of the second helical blade 330 by continuous several times, and enable material
The more consolidation being extruded.
It is appreciated that support 120 is not limited to two, or multiple.When support 120 is multiple, multiple supports
120 are alternatively arranged, and affixed with tube body 210, more smoothly to support tube body 210.
It is appreciated that bearing block 130 is not limited to two, or multiple.It is multiple when bearing block 130 is multiple
Bearing block 130 is alternatively arranged along the extending direction of pedestal.Correspondingly, first bearing is also not necessarily limited to be two, or and it is multiple,
Multiple first bearings are respectively accommodated in multiple bearing blocks 130, so that each bearing block 130 is provided with first bearing.
It is appreciated that connecting tube 230 and tube body 210 are not limited to flanged joint, or integrated formed structure.It can manage
Solution, discharge nozzle 400 and connecting tube 230 are not limited to flanged joint, or integrated formed structure.
It is appreciated that driving device is not limited to fluid pressure drive device, it can also be electric driver.
It is appreciated that feed inlet 220 is not limited to straight-tube shape, or reverse frustoconic.When feed inlet 220 is inverted round stage
When shape, the minimum value of the internal diameter of feed inlet 220 is 7 with the length ratio with the first pipeline section 211:10~1:1.
It is appreciated that the shape of the second helical blade 330 ' is not limited to above structure.Implement also referring to Fig. 3, second
The structure of the screw conveyor 10 ' of mode is roughly the same with the structure of screw conveyor 10 of first embodiment, difference
It is：Second helical blade 330 ' include along shaft 310 ' the sequentially connected first helical-blade segment 331 ' of extending direction,
Two helical-blade segments 333 ' and third helical-blade segment 335 '.
First helical-blade segment 331 ' is isometric helix blade sections.First helical-blade segment 331 ' is far from the second helical blade
One end of section 333 ' and the first helical blade 320 ' are affixed.Further, the first helical-blade segment 331 ' is partially housed in second
Pipeline section 213 ', and be partially housed in third pipeline section 215 '.In the shown embodiment, the outer diameter of the first helical-blade segment 331 '
Less than the outer diameter of the first helical blade 320 '.
When material is delivered to the first helical-blade segment 331 ', material is tentatively squeezed under the action of outer diameter difference and is become
Consolidation is obtained, the gap between material is reduced.Simultaneously as the second pipeline section 213 ' is interior without leave close to one end of the first pipeline section 211 '
It is gradually reduced to far from one end of the first pipeline section 211 ', and the internal diameter of third pipeline section 215 ' is less than the internal diameter of the first pipeline section 211 ',
So that material enters in the second pipeline section 213 ' through feed inlet 220 ', the not only effect by outer diameter difference, also by the second pipeline section
213 ' inner wall squeezes, and enables to material that can be extruded tighter.
Second helical-blade segment 333 ' is contained in connecting tube 230 ' with third helical-blade segment 335 '.First helical-blade
Segment 331 ', the second helical-blade segment 333 ' and third helical-blade segment 335 ' are isometric helix blade sections.First helical-blade
The screw pitch of segment 331 ' is equal with the screw pitch of the first helical blade 320 ', and the first helical-blade segment 331 ', the second helical blade
The screw pitch of section 333 ' and third helical-blade segment 335 ' is sequentially reduced.When material is delivered to the second helical-blade segment 333 ', third
When helical-blade segment 335 ', material is further squeezed under the action of pitch difference and more consolidation.
In a wherein embodiment, the first helical-blade segment 331 ', the second helical-blade segment 333 ' and third spiral
The ratio between screw pitch of blade sections 335 ' is 8：7：5~7：6：5.
The screw conveyor 10 ' of second embodiment divides the second helical blade 330 for sequentially connected first helical-blade
Segment 331 ', the second helical-blade segment 333 ' and third helical-blade segment 335 ', and be isometric helix blade sections, by making the
One helical-blade segment 331 ', the screw pitch of the second helical-blade segment 333 ' and third helical-blade segment 335 ' are sequentially reduced, so that object
Material can be by the first helical-blade segment 331 ', the second helical-blade segment 333 ' and third spiral shell when passing through the second helical blade 330 '
The extruding of pitch difference between vane segment 335 ', the more consolidation that material can be also squeezed.Second helical blade 330 '
The outer diameter of displacement, the first helical blade 320 ' and the second helical blade 330 ' is poor, discharge nozzle 400 ' variable diameter synergistic effect, so that
Material becomes very consolidation by repeatedly squeezing, and avoiding storeroom, there are gaps, when discharge nozzle 400 ' protrudes into gasification furnace,
Gas in gasification furnace not can enter in the material of compression, and then avoid gas leakage or the gas blowby of gasification furnace, guarantee gasification furnace
It operates normally.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (11)
1. a kind of screw conveyor, which is characterized in that including：
Body offers inlet port and outlet port；
Screw assembly, is rotatably contained in the body, the screw assembly include shaft, the first helical blade and
Second helical blade, the shaft can rotate, and the shaft extends to the discharge port, first spiral shell from the feed inlet
Vane piece and second helical blade are affixed with the shaft, and first helical blade and second helical blade are equal
It is extended spirally around the shaft, one end of first helical blade is close to the feed inlet, the other end and second spiral
One end of blade is affixed, and the other end of second helical blade extends close to the discharge port, second helical blade
Outer diameter be less than first helical blade outer diameter, second helical blade be variable-pitch propeller blade, second spiral
Screw pitch of the blade close to one end of first helical blade is greater than second helical blade far from first helical blade
One end screw pitch；And
Discharge nozzle, one end and the body are affixed, and are connected to the discharge port, and the other end is towards far from the body
Direction extend, interior one end without leave close to one end of the discharge port to the separate discharge port of the discharge nozzle gradually subtracts
It is small.
2. screw conveyor according to claim 1, which is characterized in that first helical blade is isometric helix leaf
Piece, the one end of the screw pitch of second helical blade Zi close to one end of first helical blade to close to discharge port gradually subtract
It is small.
3. screw conveyor according to claim 2, which is characterized in that second helical blade is isometrical helical-blade
Piece, the one end of the screw pitch of second helical blade Zi close to one end of first helical blade to close to discharge port is with default
Value equal difference is successively decreased, and the ratio between outer diameter of the preset value and second helical blade is 1:60~1:30.
4. screw conveyor according to claim 1, which is characterized in that first helical blade is isometric helix leaf
Piece, second helical blade include the sequentially connected first helical-blade segment of extending direction, the second spiral along the shaft
Blade sections and third helical-blade segment, the one end of the first helical-blade segment far from the second helical-blade segment and described the
One helical blade is affixed, and the first helical-blade segment, the second helical-blade segment and the third helical-blade segment are
Isometric helix blade sections, the screw pitch of the first helical-blade segment is equal with the screw pitch of first helical blade, and described
The screw pitch of one helical-blade segment, the second helical-blade segment and the third helical-blade segment is sequentially reduced.
5. screw conveyor according to claim 1, which is characterized in that the body includes tube body and connecting tube,
The tube body includes the first pipeline section, the second pipeline section and third pipeline section being sequentially communicated, and the feed inlet is opened in first pipe
Section, first pipeline section be equal pipe, second pipeline section it is interior without leave close to one end of first pipeline section arrive far from described in
One end of first pipeline section is gradually reduced, and the third pipeline section is equal pipe, and the internal diameter of the third pipeline section is less than first pipe
The internal diameter of section, the connecting tube are connected to the third pipeline section far from one end of second pipeline section, and the connecting tube is isometrical
Pipe, and the internal diameter of the connecting tube is equal with the internal diameter of the third pipeline section, it is separate that the discharge port is opened in the connecting tube
One end of the third pipeline section, the spindle portion are contained in the tube body, and are partially housed in the connecting tube, and described first
Helical blade is contained in first pipeline section, and second spiraling vane portions are contained in second pipeline section, and portion
Divide and be contained in the third pipeline section, and be partially housed in the connecting tube, one end of the discharge nozzle is remote with the connecting tube
One end from the third pipeline section is affixed.
6. screw conveyor according to claim 5, which is characterized in that the third pipeline section is interior with first pipeline section
The ratio between diameter is 28：35~31：35.
7. screw conveyor according to claim 1, which is characterized in that first helical blade is isometrical helical-blade
Piece, second helical blade are isometrical helical blade, the outer diameter of second helical blade and first helical blade it
Than being 28：35~31：35.
8. screw conveyor according to claim 1, which is characterized in that the internal diameter maxima and minima of the discharge nozzle
The ratio between be 2：1~6：5.
9. screw conveyor according to claim 1, which is characterized in that further include driving device, the driving device with
The rotating shaft transmission connection, so that the driving device can drive the shaft to rotate.
10. screw conveyor according to claim 1, which is characterized in that the driving device is fluid pressure drive device.
11. a kind of biomass gasification system, which is characterized in that including the described in any item screw conveyors of claim 1~10
And gasification furnace, the gasification furnace are connected to the discharge nozzle far from one end of the body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810792029.6A CN108910427A (en) | 2018-07-18 | 2018-07-18 | Screw conveyor and biomass gasification system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810792029.6A CN108910427A (en) | 2018-07-18 | 2018-07-18 | Screw conveyor and biomass gasification system |
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| CN108910427A true CN108910427A (en) | 2018-11-30 |
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| CN201810792029.6A Pending CN108910427A (en) | 2018-07-18 | 2018-07-18 | Screw conveyor and biomass gasification system |
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| CN109665269A (en) * | 2019-01-15 | 2019-04-23 | 湖北华电襄阳发电有限公司 | A kind of multi-stag tiny structure screw feeding device |
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