CN105841478B - Self-sealed low-order coal negative pressure drying device - Google Patents
Self-sealed low-order coal negative pressure drying device Download PDFInfo
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- CN105841478B CN105841478B CN201610233011.3A CN201610233011A CN105841478B CN 105841478 B CN105841478 B CN 105841478B CN 201610233011 A CN201610233011 A CN 201610233011A CN 105841478 B CN105841478 B CN 105841478B
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- drying
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- coal
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- heating pipe
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/001—Handling, e.g. loading or unloading arrangements
- F26B25/002—Handling, e.g. loading or unloading arrangements for bulk goods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/10—Heating arrangements using tubes or passages containing heated fluids, e.g. acting as radiative elements; Closed-loop systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/04—Agitating, stirring, or scraping devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
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- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
- Drying Of Solid Materials (AREA)
Abstract
This divisional application discloses self-sealed low-order coal negative pressure drying device, including the screw feeder being connected successively, drying and discharge with endless screw device, screw feeder sets feeding mouth, discharge with endless screw device sets discharging opening, helical blade inside screw feeder and discharge with endless screw device is fixedly connected with center heating pipe, play the coal charge scraper plate of stirring loosely to be equidistantly evenly arranged around drying inwall, set heat-exchange tube to provide coal charge inside drying and dry required heat, discharge with endless screw device sets and arranges mouth outside vapor, mouth is arranged outside vapor to be connected with dust arrester by vavuum pump.Smart structural design of the present invention, the continuous-feeding and continuous pulp discharge of coal are realized using the structure of screw extruder formula, and reach the self sealss state of drying device；Using indirect heating manner, there is the advantages of preventing high temperature spontaneous combustion and avoiding blast；And the efficient moisture in coal charge, depth and fast eliminating can be made.
Description
Present patent application is a divisional application, and the applying date of original bill application is on 2 12nd, 2015, Application No.
It is 201510074576.7 entitled：A kind of self-sealed low-order coal and coal slime negative pressure drying device.
Technical field
The present invention relates to self-sealed low-order coal negative pressure drying device, belong to coal drying equipment technical field.
Background technology
Low-order coal is mainly lignite, jet coal, dross coal, weakly caking coal etc., and because its degree of coalification is low, hole is flourishing, contains
Water is higher（Usually 30%-50%）, calorific value is low, but its fugitive constituent is high, and burning-point is low.Coal slime is coal during cracking and sorting
It is caused, it usually needs by flotation and press filtration, but the coal slime water content after press filtration is still very high（Usually it is not less than
20%）.The high-moisture of low-order coal and coal slime directly affects it and uses, transports and store.Because the moisture increase of coal, useful component
It is relative to reduce, and moisture becomes steam in burning and absorbed heat, thus reduce the caloric value of coal；The moisture increase of coal, also increases
Ineffective traffic is added, and difficulty is brought to unloading.So in order to fully develop low-order coal and coal slime, it is necessary to which it is entered
Row drying process.At present, domestic low-order coal and coal slime are dried usually using cylinder drying machine, straight using high warm flue gas and coal grain
Contact dehydration, dewatering efficiency is low, Dust Capacity is big, and the potential safety hazards such as easy spontaneous combustion, blast be present.
The moisture of coal refers to the content of the coal reclaimed water of unit mass.The moisture of coal has two kinds of inherent moisture and free moisture.
Free moisture is attached to coal particle surface, it is easy to is evaporated in dry air at normal temperatures, but is evaporated to coal particle surface
Water vapor pressure and air wetting balance when just not re-evaporation, and free moisture can also take off by mechanical presses mode
Remove.Inherent water in coal internal capillary hole mainly removes in a manner of liquid seepage flow or first evaporate spreads again, and both are de-
Water form is all relevant with interface steam partial pressure, and under subnormal ambient, interface steam partial pressure is relatively low, capillary water remove speed compared with
Greatly, in addition, according to Kelvin equation, at a temperature of same dried, environmental stress is lower, and steam partial pressure is lower, can be dehydrated
Coal mesopore size is smaller, and inherent moisture removes more thorough.So negative pressure drying environment be beneficial to moisture in coal efficiently, depth
And fast eliminating, and the heat energy needed is few.Chinese utility model patent " a kind of brown coal drying and upgrading system "（The patent No.：
201020285076.0 the day for announcing：On 2 16th, 2011）In mention closed subnormal ambient be formed by sealing feed
What end and sealing discharging end were realized, but be fed and how to accomplish that sealing does not get across with discharge.Chinese invention patent application is " brown
Coal pipe drier "（Application number：201310584790.8 publication date：On 2 19th, 2014）In the negative pressure closed loop that is previously mentioned
Border is to be equipped with two-stage sealing baffle by material feeding end and exhaust end to obtain, and this sealing device structure is more complicated and needs higher
Automaticity.
The content of the invention
For defect present in above-mentioned prior art, the invention provides self-sealed low-order coal negative pressure drying device,
Using the architectural feature of screw extruder, self sealss are realized by the disengaging process of coal charge to obtain negative pressure closed environment, solved
Closed subnormal ambient is difficult to the technical problem obtained in low-order coal and coal slime negative pressure drying.
In order to realize the purpose of the present invention, the invention provides two kinds of technical schemes.
The first technical scheme provided by the invention is：The present invention includes screw feeder, the drying being connected successively
Cylinder and discharge with endless screw device, screw feeder and discharge with endless screw device all include column part and frusto-conical portion, and wherein spiral is given
The column part of glassware is connected with drying, and the frusto-conical portion of discharge with endless screw device is connected with drying；
The frusto-conical portion of screw feeder sets feeding mouth, and the end of the column part of discharge with endless screw device sets discharging
Mouthful；
Helical blade is set inside screw feeder and discharge with endless screw device, the pitch between the adjacent helical blade along
Gradually successively decrease in the direction that column part is assigned to from frusto-conical portion；
Center heating pipe runs through screw feeder, drying and discharge with endless screw device, screw feeder along central axial direction
It is fixedly connected with the helical blade inside discharge with endless screw device with center heating pipe；
Inside drying, at least 3 lump coal material scraper plates are with centerline axis parallel and equidistantly uniform around drying inwall
Arrangement, every piece of coal charge scraper plate are fixedly connected by least 2 pieces of supporting plates with center heating pipe；
Inside drying, U-shaped heat-exchange tube around center heating pipe with radial arrangement, the U-shaped heat-exchange tube
Two-port is fixedly connected and penetrated with center heating pipe；
Helical blade, coal charge scraper plate, supporting plate, U-shaped heat-exchange tube and center heating pipe are connected as an entirety, in power
With identical rotating speed rotary motion under the driving of system；
The frusto-conical portion of discharge with endless screw device sets and mouth is arranged outside vapor, arranged outside the vapor mouth by vavuum pump with
Dust arrester connects.
Further optimize, the set-up mode of U-shaped heat-exchange tube is in the first technical scheme：Inside drying, in
Cross circular section loop wire sets sealing plate in central hot pipe at the one of heart heating pipe, and U-shaped heat-exchange tube described at least three encloses
Equidistantly it is evenly arranged with radial around the sealing plate, and the two-port of all U-shaped heat-exchange tubes is distributed in the sealing plate
Both sides；Set in the manner previously described at least three diverse location cross circular section loop wire of the center heating pipe inside drying
Put sealing plate and U-shaped heat-exchange tube.
Second of technical scheme provided by the invention be：The present invention includes screw feeder, the drying being connected successively
Cylinder and discharge with endless screw device, screw feeder and discharge with endless screw device all include column part and frusto-conical portion, and wherein spiral is given
The column part of glassware is connected with drying, and the frusto-conical portion of discharge with endless screw device is connected with drying；
The frusto-conical portion of screw feeder sets feeding mouth, and the end of the column part of discharge with endless screw device sets discharging
Mouthful；
Helical blade is set inside screw feeder and discharge with endless screw device, the pitch between the adjacent helical blade along
Gradually successively decrease in the direction that column part is assigned to from frusto-conical portion；
Center heating pipe runs through screw feeder and discharge with endless screw device, screw feeder and spiral row along central axial direction
Helical blade inside glassware is fixedly connected with center heating pipe；
Inside drying, drying both ends respectively set one and are less than drying diameter with central axis upright and diameter
Hollow disc, the relative side of two hollow discs are fixedly connected and penetrated by straight type heat-exchange tube, the two hollow circles
The opposite side of disk is fixedly connected and penetrated with center heating pipe respectively in its circle centre position；
Inside drying, at least 3 lump coal material scraper plates are with centerline axis parallel and equidistantly uniform around drying inwall
Arrangement, the edge of the both ends of every piece of coal charge scraper plate respectively with two hollow discs are fixedly connected；
Helical blade, coal charge scraper plate, hollow disc, straight type heat-exchange tube and center heating pipe are connected as an entirety,
With identical rotating speed rotary motion under the driving of dynamical system；
The frusto-conical portion of discharge with endless screw device sets and mouth is arranged outside vapor, arranged outside the vapor mouth by vavuum pump with
Dust arrester connects.
Further optimize, the set-up mode of straight type heat-exchange tube is in second of technical scheme：Straight type heat described at least three
Pipe is exchanged parallel to the center of circle connecting line of two hollow discs and is evenly arranged along a concentric circles on hollow disc；According to preceding
State the straight type heat-exchange tube of arranged in concentric circles of the mode along at least three different-diameter on hollow disc.
In addition, further optimization, can be applicable following technical characteristic in first and second kinds of technical schemes：
（1）The outer wrap heat-insulation layer of drying, annular heat is wound along dry drum outer wall between drying and heat-insulation layer
Tracheae；
（2）The coal charge scraper plate is with drying inwall at a distance of 1-10mm；
（3）The inwall of screw feeder and the discharge with endless screw device is with helical blade outer rim at a distance of 5-20mm；
（4）The dust arrester is cyclone dust collectors or wet scrubber；
（5）Make by screw feeder in the way of upper and discharge with endless screw device is under, during installation center heating pipe with it is horizontal
Face is into 5-20 ° of inclination angle；
（6）The dynamical system includes motor, decelerator, clutch, gear train and bearing, and dynamical system drives center
Heating pipe rotates.
Smart structural design of the present invention, the continuous-feeding and continuous pulp discharge of coal are realized using the structure of screw extruder formula,
And reach the self sealss state of drying device.Coal charge from the frusto-conical portion of screw feeder and discharge with endless screw device enter again from
Column part is discharged, and is moved ahead vertically under the promotion of the helical blade of rotation.Due to, screw feeder and discharge with endless screw device from
Frusto-conical portion assigns to the reduction of column part diameter, and the pitch between adjoining spiral blade assigns to circle along from frusto-conical portion
The direction of post part is gradually successively decreased, so the extruding force that coal charge is constantly increased during moving ahead, finally in column part
The cylindric coal charge being compacted full of whole space is formed, so as to realize the self sealss state of drying device.
Because the coal charge entered after screw feeder extrudes inside drying is most of into bulk, it is unfavorable for filling for coal charge
Divide drying, so the present invention sets coal charge scraper plate to disperse block coal charge inside drying.Will by the rotation of coal charge scraper plate
The coal charge of drying bottom leaves after being lifted to certain altitude.Coal charge is handed in dropping process with U-shaped heat-exchange tube or straight type heat
Pipe collision rupture is changed, and in the fragmentation of drying bottom.By the rotation of multiple coal charge scraper plates, coal charge is constantly elevated and leaves,
Said process is repeated, so as to by fully loose.In addition, coal charge scraper plate makes coal charge scraper plate and drying around drying inwall arrangement
Cylinder inwall is at a distance of 1-10mm, it is ensured that the coal charge of drying bottom is swept and lifted completely by coal charge scraper plate.
The present invention uses indirect heating manner, has the advantages of preventing high temperature spontaneous combustion and avoiding blast.Can be with the present invention
, can also be special beneficial to saving the energy and reducing cost using caused waste heat in boiler or production technology pipeline as thermal source
From setting thermal source.Center heating pipe and annular heating pipe are connected with thermal source and are passed through hot gas.The hot gas of center heating pipe flows into U-shaped heat and handed over
Heat is distributed after changing pipe or straight type heat-exchange tube, raises temperature in drying.In addition, the heat-insulation layer of drying outer wrap can
To prevent scattering and disappearing for heat, the annular heating pipe of winding can also distribute heat, further improve the temperature in drying.Pass through
This indirect heating manner makes to keep higher temperature inside drying, there is provided the heat that moisture evaporation needs in coal charge.
Coal charge can produce substantial amounts of vapor in the drying process, so frusto-conical portion of the present invention in discharge with endless screw device
Set up separately to put and arrange mouth outside vapor.Vapor arranges the coal dust portion carried during mouth outside from drying internal flow to vapor
Divide and settle down, and further flow through outer row after the coal dust removing completely that dust arrester is carried, avoid the dirt to environment
Dye.After row's mouth is connected with vavuum pump outside vapor, the vapor inside drying can quickly be extracted out using vavuum pump.Due to
The both ends of drying device realize self sealss state by screw feeder and discharge with endless screw device, so quickly being drawn water through vavuum pump
After steam, the pressure inside drying device is set to be less than the atmospheric pressure of outside, so as to form a negative pressure closed environment.
Coal charge after extruding, can be extruded the particulate interspaces water section of originally loose coal charge in screw feeder
To surface, it is easier to be removed by thermal evaporation at higher temperature inside the drying.Negative pressure closed environment inside drying
In, inherent water in coal charge particle internal capillary hole is with liquid seepage flow or first evaporates again diffusion mode removing, these processes with
Interface steam partial pressure is relevant.Environment vacuum degree is higher, and interface steam partial pressure is smaller, and the removing speed of inherent water is bigger, separately
Outside, according to Kelvin equation, at a temperature of same dried, environmental stress is lower, and steam partial pressure is lower, the coal mesopore that can be dehydrated
Gap size is smaller, and inherent moisture removes more thorough.By the peptizaiton of coal charge scraper plate, block coal charge is set to be lifted and left
During become loose, add the heating surface area of coal charge, accelerate abundant, the rapid evaporation of moisture in coal charge.By true
Empty pump quickly extracts vapor out, reduces the steam partial pressure on coal charge surface, can also promote the evaporation process of moisture.It is comprehensive with
Upper various effects, the free moisture that the drying device in the present invention can be removed in coal can remove inherent moisture again, realization
The efficient of moisture, depth and fast eliminating in coal charge.
Drying device is installed according to angled manner of the screw feeder in upper discharge with endless screw device under, can rely on coal charge
Flowing is realized in deadweight, saves power, is easy to implement the continuous work of drying device, improves operating efficiency.
Motor in dynamical system provides power, is then made by the linkage of decelerator, clutch, gear train and bearing
With rotating the certain rotating speed of center heating pipe, so as to drive with center heating pipe be linked to be an entirety helical blade,
Coal slime scraper plate, U-shaped heat-exchange tube or straight type heat-exchange tube and hollow disc are rotated with identical rotating speed.
Brief description of the drawings
Fig. 1 is the structural representation of the first technical scheme in the present invention.
Fig. 2 is the schematic diagram of Section A-A in Fig. 1.
Fig. 3 is the structural representation of second of technical scheme in the present invention.
Fig. 4 is the schematic diagram of section B-B in Fig. 3.
Embodiment
For a better understanding of the present invention, the present invention is described further below in conjunction with the accompanying drawings.
Fig. 1 and Fig. 2 show a kind of embodiment of the first technical scheme in the present invention, including coordinates company successively
The screw feeder 1 that connects, drying 2 and discharge with endless screw device 3, screw feeder 1 and discharge with endless screw device 3 all include column part and
Frusto-conical portion, the wherein column part of screw feeder 1 are connected with drying 2, the frusto-conical portion of discharge with endless screw device 3
It is connected with drying 2；
The frusto-conical portion of screw feeder 1 sets feeding mouth 12, and the end of the column part of discharge with endless screw device 3 is set
Discharging opening 13；
Screw feeder 1 and the inside of discharge with endless screw device 3 set helical blade 5, the pitch between the adjacent helical blade 5
Gradually successively decrease along the direction that column part is assigned to from frusto-conical portion；
Center heating pipe 4 runs through screw feeder 1, drying 2 and discharge with endless screw device 3 along central axial direction, and spiral is given
Helical blade 5 inside glassware 1 and discharge with endless screw device 3 is fixedly connected with center heating pipe 4；
Inside drying 2, at least 3 lump coal material scraper plates 6 are with centerline axis parallel and equidistantly equal around the inwall of drying 2
Even arrangement, and be fixedly connected per lump coal material scraper plate 6 by least 2 pieces of supporting plates 14 with center heating pipe 4；
Inside drying 2, U-shaped heat-exchange tube 15 is around center heating pipe 4 with radial arrangement, the U-shaped heat exchange
The two-port of pipe 15 is fixedly connected and penetrated with center heating pipe 4；
Helical blade 5, coal charge scraper plate 6, supporting plate 14, U-shaped heat-exchange tube 15 and center heating pipe 4 be connected as one it is whole
Body, with identical rotating speed rotary motion under the driving of dynamical system；
The frusto-conical portion of discharge with endless screw device 3 sets and mouth 7 is arranged outside vapor, and arranging mouth 7 outside the vapor passes through vacuum
Pump 8 is connected with dust arrester 9.
In addition, the outer wrap heat-insulation layer 10 of drying 2, is twined between drying 2 and heat-insulation layer 10 along the outer wall of drying 2
Around annular heating pipe 11.
The set-up mode of U-shaped heat-exchange tube 15 is described in the first technical scheme：Inside drying 2, along central hot
Cross circular section loop wire sets sealing plate 16, U-shaped heat-exchange tube 15 described at least three inside center heating pipe 4 at the one of tracheae 4
Equidistantly it is evenly arranged with radial around the sealing plate 16, and the two-port of all U-shaped heat-exchange tubes 15 is distributed in this
The both sides of sealing plate 16；At least three diverse location cross section of center heating pipe 4 inside drying 2 in the manner previously described
Sealing plate 16 and U-shaped heat-exchange tube 15 are set at loop line.
Fig. 3 and Fig. 4 show a kind of embodiment of second of technical scheme in the present invention, including coordinates company successively
Screw feeder 1, drying 2 and the discharge with endless screw device 3 connect, screw feeder 1 and discharge with endless screw device 3 include column part and cut
Head tapered segment, the wherein column part of screw feeder 1 is connected with drying 2, the frusto-conical portion of discharge with endless screw device 3 and
Drying 2 connects；
The frusto-conical portion of screw feeder 1 sets feeding mouth 12, and the end of the column part of discharge with endless screw device 3 is set
Discharging opening 13；
Screw feeder 1 and the inside of discharge with endless screw device 3 set helical blade 5, the pitch between the adjacent helical blade 5
Gradually successively decrease along the direction that column part is assigned to from frusto-conical portion；
Center heating pipe 4 runs through screw feeder 1 and discharge with endless screw device 3, screw feeder 1 and spiral shell along central axial direction
Helical blade 5 inside rotation removal device 3 is fixedly connected with center heating pipe 4；
Inside drying 2, the both ends of drying 2 respectively set one it is straight less than drying 2 with central axis upright and diameter
The hollow disc 17 in footpath, the relative side of two hollow discs 17 are fixedly connected and penetrated, two by straight type heat-exchange tube 18
The opposite side of the hollow disc 17 is fixedly connected and penetrated with center heating pipe 4 respectively in its circle centre position；
Inside drying 2, at least 3 lump coal material scraper plates 6 are with centerline axis parallel and equidistantly equal around the inwall of drying 2
Even arrangement, and edge of the both ends per lump coal material scraper plate 6 respectively with two hollow discs 17 is fixedly connected；
Helical blade 5, coal charge scraper plate 6, hollow disc 17, straight type heat-exchange tube 18 and center heating pipe 4 are connected as one
It is overall, with identical rotating speed rotary motion under the driving of dynamical system；
The frusto-conical portion of discharge with endless screw device 3 sets and mouth 7 is arranged outside vapor, and arranging mouth 7 outside the vapor passes through vacuum
Pump 8 is connected with dust arrester 9.
In addition, the outer wrap heat-insulation layer 10 of drying 2, is twined between drying 2 and heat-insulation layer 10 along the outer wall of drying 2
Around annular heating pipe 11.
The set-up mode of straight type heat-exchange tube 18 is described in second of technical scheme：Straight type heat exchange described at least three
Pipe 18 parallel to two hollow discs 17 center of circle connecting line and be evenly arranged along a concentric circles on hollow disc 17；According to
The straight type heat-exchange tube 18 of arranged in concentric circles of the aforementioned manner along at least three different-diameter on hollow disc 17.
Arrow show the process of circulation of hot gas in the first technical scheme in Fig. 1.Hot gas is first from screw feeder 1 one
The center heating pipe 4 at end is passed through, and running into sealing plate 16 during moving ahead stops, forces hot gas from the one of U-shaped heat-exchange tube 15
Individual port enters and discharged from another port, returns in center heating pipe 4 and in forward process again by next piece of sealing plate
16 stop, force hot gas to enter again from a port of U-shaped heat-exchange tube 15 and are discharged from another port；Hot gas is moving ahead
During constantly repeat said process, eventually pass back to the center heating pipe 4 of the one end of discharge with endless screw device 3 and outer arrange.In addition, in annular
Hot gas is passed through from the one end of screw feeder 1 in heating pipe 11, is flowed along annular heating pipe 11, finally from discharge with endless screw device 3 one
End discharge.
Arrow show the process of circulation of hot gas in second of technical scheme in Fig. 3：Hot gas is first from screw feeder 1 one
The center heating pipe 4 at end is passed through, subsequently into the hollow disc 17 of the one end of screw feeder 1, the hot gas in hollow disc 17
Spread out, respectively enterd in different straight type heat-exchange tubes 18 by stop.Hot gas converges after the outflow of straight type heat-exchange tube 18
In the hollow disc 17 for collecting the one end of discharge with endless screw device 3, finally enter in the center heating pipe 4 of the one end of discharge with endless screw device 3 and outer
Row.In addition, hot gas is passed through from the one end of screw feeder 1 in annular heating pipe 11, flowed along belt heating pipe 11, finally from
Discharge the one end of discharge with endless screw device 3.
The course of work of drying device is as follows in the first and second of technical scheme：
（1）Start dynamical system first, make center heating pipe 4, helical blade 5, U-shaped heat-exchange tube 15 or straight type heat exchange
Pipe 18 and hollow disc 17 rotate.Hot gas is passed through in center heating pipe 4 and annular heating pipe 11, according to the stream of above-mentioned hot gas
By Cheng Liujing drying devices, the inside of drying 2 is set to keep higher temperature, there is provided to dry the heat needed for coal charge.
（2）The feeding mouth 12 of below granularity 13mm and the coal charge of water content more than 20% through screw feeder 1 is entered into drying
Device.In the rotary course of the helical blade 5 of screw feeder 1, assign to column part coal charge from frusto-conical portion and promoted
Move ahead and be squeezed, finally form the cylindric coal being compacted full of whole space in the column part of screw feeder 1
Material, so as to serve self sealing action.Because coal charge is continuously fed, it is possible to persistently keep self sealss state.Coal charge is in spiral shell
Revolve dispenser 1 in after extruding, coal charge particulate interspaces water section can be made to be extruded out, into drying 2 inside it is higher
It can be easier to be removed by thermal evaporation under temperature environment.
（3）Coal charge enters inside drying 2 after the extruding of screw feeder 1, and now coal charge is largely the block being compacted
Shape.In the rotary course of coal charge scraper plate 6, after the coal charge of the bottom of drying 2 is thus lifted to certain altitude along the inwall of drying 2
Leave.Coal charge is collided and ruptured with U-shaped heat-exchange tube 15 or straight type heat-exchange tube 18 in dropping process, and in the bottom of drying 2
Fragmentation.By the rotation of multiple coal charge scraper plates 6, coal charge is constantly elevated and leaves, and repeats said process, so as to by abundant pine
Dissipate.In the relaxing process of coal charge, add the heating surface area of coal charge, make moisture in coal charge fully, rapid evaporation.
The coal that caused vapor is carried by arranging mouth 7 and removing dust device 9 outside vapor in coal charge drying process
It is outer after powder removing completely to arrange., can be by inside drying 2 using vavuum pump 8 after row's mouth 7 is connected with vavuum pump 8 outside vapor
Vapor is quickly extracted out.Because the both ends of drying device realize self sealss shape by screw feeder 1 and discharge with endless screw device 3
State, so after vavuum pump 8 quickly draws water steam, the pressure inside drying device is set to be less than the atmospheric pressure of outside, so as to shape
Into a negative pressure closed environment.In negative pressure closed environment inside drying 2, the inherence in coal charge particle internal capillary hole
Water is with liquid seepage flow or first evaporates again diffusion mode removing, and these processes are relevant with interface steam partial pressure.Environment vacuum degree
Higher, interface steam partial pressure is smaller, and the removing speed of inherent water is bigger, in addition, according to Kelvin equation, same dried temperature
Under, environmental stress is lower, and steam partial pressure is lower, and the coal mesopore size that can be dehydrated is smaller, and inherent moisture removes more thorough
Bottom.So the negative pressure drying environment in drying 2 makes the efficient moisture in coal charge, depth and fast eliminating, and the heat needed
Can be few.
（4）Coal charge enters discharge with endless screw device 3 inside drying 2 after loose and dry.In the spiral shell of discharge with endless screw device 3
In the rotary course of vane piece 5, assign to column part coal charge from frusto-conical portion and moved ahead and be squeezed by promoting again, in spiral shell
The column part for revolving removal device 3 forms the cylindric coal charge being compacted full of whole space, so as to serve self sealing action.
Because coal charge is continuously discharged, it is possible to persistently keep self sealss state.Finally, discharging opening 13 of the coal charge from discharge with endless screw device 3
Discharge, makes its water content be reduced to less than 10%.
Finally it should be noted that above word and accompanying drawing describe the key structural feature and operation principle of the present invention,
But those skilled in the art it should be appreciated that the present invention do not limited by above-mentioned embodiment, do not departing from this hair
On the premise of bright Basic Design design, the various deformation mode done to the present invention also should be in the protection domain of the present invention
It is interior.
Claims (8)
1. self-sealed low-order coal negative pressure drying device, including the screw feeder being connected successively（1）, drying（2）With
Discharge with endless screw device（3）, it is characterised in that：Screw feeder（1）With discharge with endless screw device（3）All include column part and frustum of a cone
Part, wherein screw feeder（1）Column part and drying（2）Connection, discharge with endless screw device（3）Frusto-conical portion with
Drying（2）Connection；
Screw feeder（1）Frusto-conical portion set feeding mouth（12）, discharge with endless screw device（3）The end of column part set
Put discharging opening（13）；
Screw feeder（1）With discharge with endless screw device（3）Inside sets helical blade（5）, the adjacent helical blade（5）Between
Pitch is gradually successively decreased along the direction that column part is assigned to from frusto-conical portion；
Center heating pipe（4）Run through screw feeder along central axial direction（1）With discharge with endless screw device（3）, screw feeder（1）
With discharge with endless screw device（3）Internal helical blade（5）All with center heating pipe（4）It is fixedly connected；
In drying（2）Inside, drying（2）Both ends respectively set one and are less than drying with central axis upright and diameter（2）
The hollow disc of diameter（17）, two hollow discs（17）Relative side passes through straight type heat-exchange tube（18）It is fixedly connected simultaneously
Insertion, two hollow discs（17）Opposite side its circle centre position respectively with center heating pipe（4）It is fixedly connected and penetrates；
In drying（2）Inside, at least 3 lump coal material scraper plates（6）With centerline axis parallel and around drying（2）Inwall is equidistant
It is evenly arranged, every piece of coal charge scraper plate（6）Both ends respectively with two hollow discs（17）Edge be fixedly connected；
Helical blade（5）, coal charge scraper plate（6）, hollow disc（17）, straight type heat-exchange tube（18）With center heating pipe（4）Connection
For an entirety, with identical rotating speed rotary motion under the driving of dynamical system；
Discharge with endless screw device（3）Frusto-conical portion set vapor outside arrange mouth（7）, mouth is arranged outside the vapor（7）By true
Empty pump（8）With dust arrester（9）Connection.
2. self-sealed low-order coal negative pressure drying device according to claim 1, it is characterised in that：It is straight described at least three
Type heat-exchange tube（18）Parallel to two hollow discs（17）Center of circle connecting line and along hollow disc（17）On one with one heart
Circle is evenly arranged；In the manner previously described along hollow disc（17）On at least three different-diameter arranged in concentric circles straight type heat
Exchange pipe（18）.
3. self-sealed low-order coal negative pressure drying device according to claim 1 or 2, it is characterised in that：Drying（2）Outside
Wrap up heat-insulation layer in portion（10）, in drying（2）And heat-insulation layer（10）Between along drying（2）Outer wall winds annular heating pipe
（11）.
4. self-sealed low-order coal negative pressure drying device according to claim 1 or 2, it is characterised in that：The coal charge is scraped
Plate（6）With drying（2）Inwall is at a distance of 1-10mm.
5. self-sealed low-order coal negative pressure drying device according to claim 1 or 2, it is characterised in that：The spiral is given
Glassware（1）With discharge with endless screw device（3）Inwall and helical blade（5）Outer rim is at a distance of 5-20mm.
6. self-sealed low-order coal negative pressure drying device according to claim 1 or 2, it is characterised in that：The dedusting dress
Put（9）For cyclone dust collectors or wet scrubber.
7. self-sealed low-order coal negative pressure drying device according to claim 1 or 2, it is characterised in that：Given according to spiral
Glassware（1）In upper and discharge with endless screw device（3）Mode under, make center heating pipe during installation（4）Incline with the horizontal 5-20 °
Angle.
8. self-sealed low-order coal negative pressure drying device according to claim 1 or 2, it is characterised in that：The dynamical system
System includes motor, decelerator, clutch, gear train and bearing, and dynamical system drives center heating pipe（4）Rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610233011.3A CN105841478B (en) | 2015-02-12 | 2015-02-12 | Self-sealed low-order coal negative pressure drying device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610233011.3A CN105841478B (en) | 2015-02-12 | 2015-02-12 | Self-sealed low-order coal negative pressure drying device |
| CN201510074576.7A CN104596233B (en) | 2015-02-12 | 2015-02-12 | A kind of self-sealed low-order coal and coal slime negative pressure drying device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510074576.7A Division CN104596233B (en) | 2015-02-12 | 2015-02-12 | A kind of self-sealed low-order coal and coal slime negative pressure drying device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105841478A CN105841478A (en) | 2016-08-10 |
| CN105841478B true CN105841478B (en) | 2018-01-23 |
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| CN201510074576.7A Expired - Fee Related CN104596233B (en) | 2015-02-12 | 2015-02-12 | A kind of self-sealed low-order coal and coal slime negative pressure drying device |
| CN201610233011.3A Expired - Fee Related CN105841478B (en) | 2015-02-12 | 2015-02-12 | Self-sealed low-order coal negative pressure drying device |
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| CN201510074576.7A Expired - Fee Related CN104596233B (en) | 2015-02-12 | 2015-02-12 | A kind of self-sealed low-order coal and coal slime negative pressure drying device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107144106B (en) * | 2017-04-21 | 2019-12-27 | 北京路优材料技术有限公司 | Method for drying rock asphalt powder at ultrahigh temperature and negative pressure |
| CN107621123A (en) * | 2017-10-25 | 2018-01-23 | 湖南辉讯企业管理有限公司 | A kind of pressure-bearing type processing of crude drugs drying unit |
| CN109401774A (en) * | 2018-12-04 | 2019-03-01 | 青岛伊克斯达智能装备有限公司 | The continuous thermal splitting system of waste plastics and its thermal-cracking method |
| CN109609155B (en) * | 2019-01-11 | 2021-03-05 | 扬州工业职业技术学院 | Biomass carbonization feeding device |
| CN110330051B (en) * | 2019-08-15 | 2024-04-30 | 马汝普 | Waste residue recycling device in titanium tetrachloride production process |
| CN112892088A (en) * | 2021-01-17 | 2021-06-04 | 李玉芬 | A storehouse takes place in vacuum that is used for non-woven fabrics processing usefulness to have a function of inhaling grain |
| CN114061268A (en) * | 2021-11-18 | 2022-02-18 | 中国纺织科学研究院有限公司 | Paddle type dryer |
| CN114646196A (en) * | 2022-05-23 | 2022-06-21 | 徐州杰富润机电设备有限公司 | High-efficiency low-energy-consumption coal slime feeding, drying and dewatering equipment |
| CN115585639A (en) * | 2022-10-19 | 2023-01-10 | 国能民权热电有限公司 | Coal slime drying device |
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| CN101560047A (en) * | 2008-04-16 | 2009-10-21 | 平国明 | Device and method for drying sludge with high environment protection and low cost |
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- 2015-02-12 CN CN201510074576.7A patent/CN104596233B/en not_active Expired - Fee Related
- 2015-02-12 CN CN201610233011.3A patent/CN105841478B/en not_active Expired - Fee Related
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| CN2450609Y (en) * | 2000-11-24 | 2001-09-26 | 锡山市杨市金属材料设备有限公司 | Calandria stirring dryer |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN104596233B (en) | 2016-06-15 |
| CN104596233A (en) | 2015-05-06 |
| CN105841478A (en) | 2016-08-10 |
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