CN110887357A - Raw material drying system - Google Patents
Raw material drying system Download PDFInfo
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- CN110887357A CN110887357A CN201911143269.4A CN201911143269A CN110887357A CN 110887357 A CN110887357 A CN 110887357A CN 201911143269 A CN201911143269 A CN 201911143269A CN 110887357 A CN110887357 A CN 110887357A
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- Prior art keywords
- flue gas
- drying bin
- material stirring
- heating
- drying
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- 238000001035 drying Methods 0.000 title claims abstract description 158
- 239000002994 raw material Substances 0.000 title claims abstract description 95
- 238000003756 stirring Methods 0.000 claims abstract description 119
- 238000010438 heat treatment Methods 0.000 claims abstract description 112
- 239000000463 material Substances 0.000 claims abstract description 107
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 99
- 239000003546 flue gas Substances 0.000 claims abstract description 99
- 230000005540 biological transmission Effects 0.000 claims abstract description 31
- 238000001914 filtration Methods 0.000 claims abstract description 25
- 230000007246 mechanism Effects 0.000 claims abstract description 24
- 238000009826 distribution Methods 0.000 claims abstract description 12
- 239000000428 dust Substances 0.000 claims description 31
- 239000007787 solid Substances 0.000 claims description 30
- 239000007789 gas Substances 0.000 claims description 23
- 239000002245 particle Substances 0.000 claims description 16
- 238000005303 weighing Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- 239000000779 smoke Substances 0.000 claims description 6
- 206010010904 Convulsion Diseases 0.000 claims description 3
- 230000036461 convulsion Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 239000002028 Biomass Substances 0.000 description 14
- 229910000831 Steel Inorganic materials 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 241000283216 Phocidae Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000004482 other powder Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004227 thermal cracking Methods 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
- F26B11/12—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in stationary drums or other mainly-closed receptacles with moving stirring devices
- F26B11/16—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in stationary drums or other mainly-closed receptacles with moving stirring devices the stirring device moving in a vertical or steeply-inclined plane
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
- F26B11/12—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in stationary drums or other mainly-closed receptacles with moving stirring devices
- F26B11/14—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in stationary drums or other mainly-closed receptacles with moving stirring devices the stirring device moving in a horizontal or slightly-inclined plane
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/14—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects using gases or vapours other than air or steam, e.g. inert gases
-
- 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
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/005—Treatment of dryer exhaust gases
- F26B25/007—Dust filtering; Exhaust dust filters
-
- 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
- F26B25/02—Applications of driving mechanisms, not covered by another subclass
-
- 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
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/22—Controlling the drying process in dependence on liquid content of solid materials or objects
- F26B25/225—Controlling the drying process in dependence on liquid content of solid materials or objects by repeated or continuous weighing of the material or a sample thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
- F26B2200/02—Biomass, e.g. waste vegetative matter, straw
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention provides a raw material drying system, comprising: the device comprises a drying bin, a first screw feeder, a second screw feeder, at least one heating and stirring device, an induced draft fan and a flue gas filtering device; the heating and material stirring equipment comprises: the heating material stirring pipe is provided with at least one nozzle and at least one material stirring rod; the heating material stirring pipe is arranged in the drying bin, the first end of the heating material stirring pipe is connected with a flue gas distribution pipeline through a high-temperature rotary joint, and the second end of the heating material stirring pipe is connected with a transmission mechanism; the first screw feeder is connected with a raw material inlet of the drying bin; the second screw feeder is connected with a raw material outlet of the drying bin; the draught fan is connected with the flue gas filtering equipment, and the flue gas filtering equipment is connected with the flue gas outlet of the drying bin. The invention provides a raw material drying system which can reduce energy consumption required by raw material drying.
Description
Technical Field
The invention relates to the technical field of machinery, in particular to a raw material drying system.
Background
The high moisture content of the biomass raw material affects the utilization and storage of energy, and the utilization efficiency is also lowered, and in order to efficiently utilize the biomass raw material, the biomass raw material needs to be dried.
In the prior art, biomass feedstock is dried primarily by means of a fluidized dryer. The raw material of living beings gets into the fluidized dryer from the feed inlet in, under the vibration power effect, the raw materials of living beings are thrown along horizontal plane fluidized bed, move forward in succession, and hot-blast upwards passes the fluidized bed and with wet raw materials heat transfer of living beings back, and the humid air is discharged by the air exit after cyclone removes dust, and the raw materials of dry living beings are discharged by the bin outlet. In the process of drying the biomass raw material by the fluidized dryer, a large amount of hot air needs to be provided, and the biomass raw material needs to be fluidized, so that the energy consumption is high.
Disclosure of Invention
The embodiment of the invention provides a raw material drying system which can reduce energy consumption required by raw material drying.
The embodiment of the invention provides a raw material drying system, which comprises:
the device comprises a drying bin, a first screw feeder, a second screw feeder, at least one heating and stirring device, an induced draft fan and a flue gas filtering device;
wherein, heating kickoff equipment includes: the device comprises a heating material stirring pipe, a high-temperature rotary joint and a transmission mechanism, wherein the heating material stirring pipe is provided with at least one nozzle and at least one material stirring rod;
the heating material stirring pipe is arranged inside the drying bin, the first end of the heating material stirring pipe is connected with a flue gas distribution pipeline through the high-temperature rotary joint, and the second end of the heating material stirring pipe is connected with the transmission mechanism;
the first screw feeder is connected with a raw material inlet of the drying bin;
the second screw feeder is connected with a raw material outlet of the drying bin;
the induced draft fan is connected with the flue gas filtering equipment, and the flue gas filtering equipment is connected with a flue gas outlet of the drying bin;
the first screw feeder conveys the raw material from the raw material inlet of the drying bin into the drying bin;
in each heating material stirring device, the heating material stirring pipe receives flue gas conveyed by a pipeline for distributing the flue gas, the flue gas is sprayed into the drying bin through the at least one nozzle on the heating material stirring pipe, the raw materials in the drying bin are dried by the flue gas, the transmission mechanism drives the heating material stirring pipe to rotate, and the at least one material stirring rod on the heating material stirring pipe stirs the raw materials in the drying bin;
the induced draft fan performs air draft, so that the flue gas in the drying bin enters the flue gas filtering device from the flue gas outlet, the flue gas filtering device filters the flue gas, the filtered flue gas enters the induced draft fan, and the induced draft fan discharges the flue gas;
the dried raw material in the drying bin enters the second screw feeder from a raw material outlet of the drying bin, and the dried raw material is output by the second screw feeder.
Alternatively,
the heating and material stirring equipment further comprises: a shaft sleeve;
the wall of the drying bin is provided with at least one hole, and each heating material stirring pipe corresponds to one hole;
the shaft sleeve is sleeved on a corresponding hole of the heating material stirring pipe;
the transmission mechanism is arranged outside the drying bin;
and the second end of the heating material stirring pipe penetrates through the shaft sleeve and then is connected with the transmission mechanism.
Alternatively,
the transmission mechanism comprises: the driving gear is connected with the driven gear;
the driven gear is fixed at the second end of the heating material stirring pipe and is connected with the second end of the heating material stirring pipe;
the driving gear is connected with the motor;
the driving gear is connected with the driven gear through the transmission chain;
the motor rotates to drive the driving gear to rotate, the driving gear drives the driven gear to rotate through the transmission chain, and the driven gear drives the heating stirring pipe to rotate.
Alternatively,
the flue gas filtering device comprises: a bag-type dust collector;
the bag-type dust collector is provided with a gas inlet, a gas outlet and a solid outlet;
a gas inlet of the bag-type dust collector is connected with a smoke outlet of the drying bin;
the gas outlet of the bag-type dust collector is connected with the induced draft fan;
the solid outlet of the bag-type dust collector is connected with the second screw feeder;
the draught fan carries out convulsions, makes in the dry storehouse the flue gas process exhanst gas outlet's the gas inlet of sack cleaner gets into the sack cleaner, the sack cleaner is right the flue gas filters, and after the filtration the flue gas process the gas outlet of sack cleaner gets into in the draught fan, the draught fan discharges the flue gas, the sack cleaner filters the solid particle that produces behind the flue gas by the solid outlet of sack cleaner enters into second screw feeder, second screw feeder will the solid particle output.
Alternatively,
the bag-type dust collector comprises: a rotary valve;
the rotary valve is positioned at the solid outlet of the bag-type dust collector;
the rotary valve is used for discharging the solid particles from the solid outlet of the bag-type dust collector to the second spiral feeder.
Alternatively,
the raw material drying system further comprises: a weighing and metering device;
the weighing and metering device is arranged in the drying bin;
the weighing and metering device is used for determining the weight of the raw materials in the drying bin.
Alternatively,
the raw material inlet of the drying bin is arranged at the top of the drying bin;
and the raw material outlet of the drying bin is arranged at the bottom of the drying bin.
Alternatively,
the shape of the drying bin comprises: the square opening is inverted trapezoid, the shape of a cuboid and the shape of a cylinder.
Alternatively,
the motor is used for periodically rotating forwards and reversely.
Alternatively,
there is at least one said heated kick-off pipe horizontally disposed in said drying bin.
Alternatively,
there is at least one said heated kick-off pipe disposed vertically in said drying bin.
In the embodiment of the invention, the raw materials are conveyed into the drying bin by the first screw feeder, the heating material stirring pipe is driven by the transmission mechanism to stir the raw materials in the drying bin, the flue gas is conveyed into the drying bin through the nozzle of the heating material stirring pipe to dry the raw materials in the drying bin, and then the raw materials are output by the second screw feeder.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a feedstock drying system provided in accordance with an embodiment of the present invention;
fig. 2 is a schematic view of a heating and material-stirring device and a drying chamber according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of another feedstock drying system provided in accordance with an embodiment of the present invention;
fig. 4 is a schematic layout view of a heating material stirring tube according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer and more complete, the technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention, and based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a raw material drying system, including:
the device comprises a drying bin 1, a first screw feeder 2, a second screw feeder 3, at least one heating and stirring device 4, an induced draft fan 5 and a flue gas filtering device 6;
wherein, the heating and material stirring equipment 4 comprises: the device comprises a heating material stirring pipe 41, a high-temperature rotary joint 42 and a transmission mechanism 43, wherein at least one nozzle and at least one material stirring rod are arranged on the heating material stirring pipe 41;
the heating material stirring pipe 41 is arranged inside the drying bin 1, a first end of the heating material stirring pipe 41 is connected with a flue gas distribution pipeline through the high-temperature rotary joint 42, and a second end of the heating material stirring pipe 41 is connected with the transmission mechanism 43;
the first screw feeder 2 is connected with a raw material inlet of the drying bin 1;
the second screw feeder 3 is connected with a raw material outlet of the drying bin 1;
the draught fan 5 is connected with the flue gas filtering equipment 6, and the flue gas filtering equipment 6 is connected with a flue gas outlet of the drying bin 1;
the first screw feeder 2 conveys the raw material from the raw material inlet of the drying bin 1 into the drying bin 1;
in each heating and material stirring device 4, the heating material stirring pipe 41 receives flue gas conveyed by a pipeline for distributing the flue gas, the flue gas is sprayed into the drying bin 1 through the at least one nozzle on the heating material stirring pipe 41, the raw material in the drying bin 1 is dried by the flue gas, the transmission mechanism 43 drives the heating material stirring pipe 41 to rotate, and the at least one material stirring rod on the heating material stirring pipe 41 stirs the raw material in the drying bin;
the induced draft fan 5 performs air draft, so that the flue gas in the drying bin 1 enters the flue gas filtering device 6 from the flue gas outlet, the flue gas filtering device 6 filters the flue gas, the filtered flue gas enters the induced draft fan 5, and the induced draft fan 5 discharges the flue gas;
the dried raw material in the drying bin 1 enters the second screw feeder 3 from the raw material outlet of the drying bin 1, and the second screw feeder 3 outputs the dried raw material.
In the embodiment of the invention, the raw materials are conveyed into the drying bin by the first screw feeder, the heating material stirring pipe is driven by the transmission mechanism to stir the raw materials in the drying bin, the flue gas is conveyed into the drying bin through the nozzle of the heating material stirring pipe to dry the raw materials in the drying bin, and then the raw materials are output by the second screw feeder.
In the embodiment of the invention, the motor in the first screw feeder can be a variable frequency motor, and the motor in the second screw feeder can be a variable frequency motor. First screw feeder and second screw feeder have the material level self sealss function, have better sealed effect in the region that links to each other with dry storehouse, can avoid the flue gas to leak outward.
In an embodiment of the present invention, the heating and stirring device further includes: a shaft sleeve;
the wall of the drying bin is provided with at least one hole, and each heating material stirring pipe corresponds to one hole;
the shaft sleeve is sleeved on a corresponding hole of the heating material stirring pipe;
the transmission mechanism is arranged outside the drying bin;
and the second end of the heating material stirring pipe penetrates through the shaft sleeve and then is connected with the transmission mechanism.
In the embodiment of the invention, at least one hole on the wall of the drying bin can correspond to the heating material stirring pipes one by one. The shaft sleeve plays a role in supporting the heating material stirring pipe. When the transmission mechanism drives the heating material stirring pipe to rotate, the heating material stirring pipe can rub with the shaft sleeve instead of directly rubbing with the bin wall of the drying bin, so that the bin wall of the drying bin is protected. In addition, compared with the bin wall of the drying bin, the shaft sleeve can also reduce the abrasion of the heating material stirring pipe to the bin wall.
As shown in fig. 2, a schematic diagram of a heating and material-stirring device and a drying bin according to an embodiment of the present invention is provided. The figure shows a drying bin 1, a heating material stirring pipe 41, a high-temperature rotary joint 42, a transmission mechanism 43, a nozzle 411, a material stirring rod 412 and a shaft sleeve 44. Fig. 2 is a sectional view.
In an embodiment of the present invention, the transmission mechanism includes: the driving gear is connected with the driven gear;
the driven gear is fixed at the second end of the heating material stirring pipe and is connected with the second end of the heating material stirring pipe;
the driving gear is connected with the motor;
the driving gear is connected with the driven gear through the transmission chain;
the motor rotates to drive the driving gear to rotate, the driving gear drives the driven gear to rotate through the transmission chain, and the driven gear drives the heating stirring pipe to rotate.
In the embodiment of the invention, the gear teeth of the driven gear are meshed with the transmission chain, and the gear teeth of the driving gear are meshed with the transmission chain. The driving gear is fixed on a motor shaft of the motor.
In an embodiment of the invention, the motor is used for periodically rotating forwards and reversely.
In the embodiment of the invention, the motor rotates forwards and backwards periodically, so that the raw materials can be prevented from being wound on the heating material stirring pipe. The motor may be a variable frequency motor.
As shown in fig. 3, in an embodiment of the present invention, the flue gas filtering apparatus 6 includes: a bag-type dust collector 61;
the bag-type dust collector 61 is provided with a gas inlet, a gas outlet and a solid outlet;
the gas inlet of the bag-type dust collector 61 is connected with the flue gas outlet of the drying bin 1;
the gas outlet of the bag-type dust collector 61 is connected with the induced draft fan 5;
the solid outlet of the bag-type dust collector 61 is connected with the second screw feeder 3;
the draught fan carries out convulsions, makes in the dry storehouse the flue gas process exhanst gas outlet's the gas inlet of sack cleaner gets into the sack cleaner, the sack cleaner is right the flue gas filters, and after the filtration the flue gas process the gas outlet of sack cleaner gets into in the draught fan, the draught fan discharges the flue gas, the sack cleaner filters the solid particle that produces behind the flue gas by the solid outlet of sack cleaner enters into second screw feeder, second screw feeder will the solid particle output.
In the embodiment of the invention, after the raw materials are dried by the flue gas in the drying bin, the temperature of the flue gas is reduced and a large amount of moisture is carried, micro negative pressure is formed in the drying bin under the action of the induced draft fan, and the flue gas enters the bag-type dust collector from the flue gas outlet. The solid particles generated after the bag-type dust collector filters the flue gas are mainly particles of the raw materials, the solid particles are conveyed to the second screw feeder, and the solid particles and the dried raw materials are output together by the second screw feeder.
In an embodiment of the present invention, the bag-type dust collector includes: a rotary valve;
the rotary valve is positioned at the solid outlet of the bag-type dust collector;
the rotary valve is used for discharging the solid particles from the solid outlet of the bag-type dust collector to the second spiral feeder.
In an embodiment of the invention the rotary valve is connected to the second screw feeder by a drop tube into which the rotary valve can discharge solid particles which fall under the influence of gravity into the second screw feeder.
In the embodiment of the invention, the bag-type dust collector can comprise a dust hopper, the solid outlet is positioned at the bottom of the dust hopper, and solid particles obtained after the flue gas is filtered fall into the dust hopper.
In one embodiment of the invention, the flue gas filtering equipment can be used for spraying and cooling the flue gas, reducing the concentration of nitrogen oxides and sulfides in the flue gas by matching with an absorbent, absorbing the waste heat in the flue gas by a second absorption heat pump and eliminating smoke plume in the flue gas.
In an embodiment of the present invention, the raw material drying system further includes: a weighing and metering device;
the weighing and metering device is arranged in the drying bin;
the weighing and metering device is used for determining the weight of the raw materials in the drying bin.
In an embodiment of the present invention, a weighing and metering device, which may be a weight sensor, may be located on an inner wall of the drying bin.
In one embodiment of the invention, the raw material inlet of the drying bin is arranged at the top of the drying bin;
and the raw material outlet of the drying bin is arranged at the bottom of the drying bin.
In the embodiment of the invention, the raw material is conveyed into the drying bin from the raw material inlet of the drying bin by the first screw feeder, the raw material falls from the top of the drying bin to the bottom of the drying bin under the action of gravity, and is stirred and heated by the heating stirring device in the falling process, and the dried raw material falls to the bottom of the drying bin and falls into the second screw feeder from the raw material outlet of the drying bin.
In an embodiment of the present invention, the shape of the drying chamber includes: the square opening is inverted trapezoid, the shape of a cuboid and the shape of a cylinder.
In the embodiment of the invention, the square-opening inverted-trapezoidal drying bin can ensure the continuity and stability of raw materials entering the drying bin.
In an embodiment of the invention, there is at least one heating and setting pipe horizontally arranged in the drying bin.
In an embodiment of the invention, there is at least one heating and kickoff pipe vertically arranged in the drying bin.
In an embodiment of the present invention, the first ends of the heating material stirring pipes in the adjacent heating material stirring devices are arranged in opposite directions.
The temperature of the flue gas close to the first end of the heating material stirring pipe is higher, and along with the heat exchange with the raw materials in the drying bin, the farther away from the first end, the lower the temperature of the flue gas is. Through the reverse arrangement in the embodiment of the invention, the temperature of one side of the drying bin can be prevented from being far higher than that of the other side, so that the temperature of the drying bin is relatively balanced, and further, raw materials at various positions in the drying bin can be dried.
For example, the heating and material stirring device a and the heating and material stirring device B are adjacent, and if the first end of the heating and material stirring pipe in the heating and material stirring device a is on the left side, the first end of the heating and material stirring pipe in the heating and material stirring device B is on the right side.
As shown in fig. 4, four heating material stirring pipes, namely a heating material stirring pipe 41a, a heating material stirring pipe 41b, a heating material stirring pipe 41c and a heating material stirring pipe 41d, and the drying bin 1 are shown. The first ends of the adjacent heating material stirring pipes are arranged in the opposite direction. Also shown in fig. 3 is a flue gas distribution pipe 401, to which pipe 401 is connected a first end of a heated plectrum pipe. Fig. 4 also shows the high-temperature rotary joints corresponding to each heating stirring pipe, namely a high-temperature rotary joint 42a, a high-temperature rotary joint 42b, a high-temperature rotary joint 42c and a high-temperature rotary joint 42 d.
In addition, in dry storehouse, the heating is dialled the material pipe and is arranged at the length direction plum blossom shape in dry storehouse, can make the raw materials in the dry storehouse can be by more even drying like this, and drying effect is better.
In an embodiment of the present invention, the heating setting pipe may include: the device comprises a hollow steel pipe, at least one nozzle and at least one material stirring rod. The hollow steel pipe is provided with a plurality of holes, each hole corresponds to one nozzle, and the nozzles are connected with the holes of the steel pipe. Each kick-out lever can be welded on the outer wall of the steel pipe. The first end that the pipeline that heating group material pipe and distribution flue gas link to each other has the entry of flue gas, and the second end that heating group material pipe and drive mechanism link to each other can be sealed. This prevents the smoke from being ejected from the second end.
In the rotating process of the heating material stirring pipe, high-temperature smoke is transmitted in the hollow steel pipe, and when reaching one nozzle, part of smoke can be sprayed out of the nozzle.
The nozzles on the heating material stirring pipe can be uniformly distributed, and the material stirring rods on the heating material stirring pipe can also be uniformly distributed. The back of the heating material stirring pipe can be provided with a reinforcing stiffening plate to increase the durability of the heating material stirring pipe.
In the embodiment of the invention, the flue gas distribution pipeline is connected with the air supply and distribution system, and the air supply and distribution system inputs flue gas to the flue gas distribution pipeline. The air supply and distribution system can distribute the amount of flue gas, control the flow rate and control the temperature of the flue gas in an area according to the arrangement of the heating material stirring pipes on the side surface of the drying bin and the different requirements of each layer of the heating material stirring pipes, so that a certain drying temperature field is formed.
In an embodiment of the present invention, the raw material drying system may further include a control system, the control system may control the amount of raw materials entering the drying bin, may control distribution and flow rate of flue gas, may control internal temperature of the drying bin, may control a heating and material stirring device, may control pressure flow rate of an induced draft fan, may control feeding amount and metering of raw materials entering the drying bin, and may realize adjustment of drying parameters according to different raw material characteristic curves, reaching set drying and raw material conveying indexes, and ensuring index stability and conveying reliability of raw material supply through relevant measuring point parameters and logic control systems.
The Control System comprises equipment measuring points for temperature, pressure, weight, current and the like, and comprises a PLC (programmable logic Controller) Control System or a DCS (Distributed Control System), wherein the Control System can realize accurate Control of drying and feeding, record of the quantity and quality of raw materials entering a furnace, provide production parameters and check production indexes, and is applied to a production management System.
The raw material drying system provided by the embodiment of the invention can be applied to a biological boiler, a biomass forming and drying feeder, a biomass gasification and drying feeding device and a biomass thermal cracking and drying feeding device of a cogeneration project, and can also be applied to application scenes similar to biomass materials.
The embodiment of the invention provides a raw material drying system, heating and drying are realized through flue gas heating, an original storage bin can be used as a drying bin, the equipment investment is reduced, an integrated control system achieves the stability of the supply quantity and quality of raw materials, the frequent working condition adjustment of biomass comprehensive utilization equipment is avoided, the requirement on the adaptability of the equipment is lowered, and the production reliability is facilitated.
In the embodiment of the invention, the heating material stirring pipes are suitable for being arranged in a warehouse and in a grading way, the number, the angle, the diameter and the length of the material stirring rods can be designed and arranged according to different characteristics of raw materials, the material stirring pipes are also suitable for being used in a dryer with independent functions, and are also suitable for drying other powder and particle substances except biomass, and can also be used in a steam dryer except for flue gas.
The raw material drying system provided by the embodiment of the invention realizes the integration of raw material storage, drying and feeding, saves investment and space, ensures the continuity and reliability of production, fully utilizes the waste heat of the system to realize the drying of the raw materials, and meets the raw material requirements of different biomass comprehensive utilization devices.
The feedstock mentioned in the examples of the present invention may be a biomass feedstock.
It should be noted that not all steps and modules in the above flows and system structure diagrams are necessary, and some steps or modules may be omitted according to actual needs. The execution order of the steps is not fixed and can be adjusted as required. The system structure described in the above embodiments may be a physical structure or a logical structure, that is, some modules may be implemented by the same physical entity, or some modules may be implemented by a plurality of physical entities, or some components in a plurality of independent devices may be implemented together.
In the above embodiments, the hardware unit may be implemented mechanically or electrically. For example, a hardware element may comprise permanently dedicated circuitry or logic (such as a dedicated processor, FPGA or ASIC) to perform the corresponding operations. The hardware elements may also comprise programmable logic or circuitry, such as a general purpose processor or other programmable processor, that may be temporarily configured by software to perform the corresponding operations. The specific implementation (mechanical, or dedicated permanent, or temporarily set) may be determined based on cost and time considerations.
While the invention has been shown and described in detail in the drawings and in the preferred embodiments, it is not intended to limit the invention to the embodiments disclosed, and it will be apparent to those skilled in the art that various combinations of the code auditing means in the various embodiments described above may be used to obtain further embodiments of the invention, which are also within the scope of the invention.
Claims (10)
1. A feedstock drying system, comprising:
the device comprises a drying bin, a first screw feeder, a second screw feeder, at least one heating and stirring device, an induced draft fan and a flue gas filtering device;
wherein, heating kickoff equipment includes: the device comprises a heating material stirring pipe, a high-temperature rotary joint and a transmission mechanism, wherein the heating material stirring pipe is provided with at least one nozzle and at least one material stirring rod;
the heating material stirring pipe is arranged inside the drying bin, the first end of the heating material stirring pipe is connected with a flue gas distribution pipeline through the high-temperature rotary joint, and the second end of the heating material stirring pipe is connected with the transmission mechanism;
the first screw feeder is connected with a raw material inlet of the drying bin;
the second screw feeder is connected with a raw material outlet of the drying bin;
the induced draft fan is connected with the flue gas filtering equipment, and the flue gas filtering equipment is connected with a flue gas outlet of the drying bin;
the first screw feeder conveys the raw material from the raw material inlet of the drying bin into the drying bin;
in each heating material stirring device, the heating material stirring pipe receives flue gas conveyed by a pipeline for distributing the flue gas, the flue gas is sprayed into the drying bin through the at least one nozzle on the heating material stirring pipe, the raw materials in the drying bin are dried by the flue gas, the transmission mechanism drives the heating material stirring pipe to rotate, and the at least one material stirring rod on the heating material stirring pipe stirs the raw materials in the drying bin;
the induced draft fan performs air draft, so that the flue gas in the drying bin enters the flue gas filtering device from the flue gas outlet, the flue gas filtering device filters the flue gas, the filtered flue gas enters the induced draft fan, and the induced draft fan discharges the flue gas;
the dried raw material in the drying bin enters the second screw feeder from a raw material outlet of the drying bin, and the dried raw material is output by the second screw feeder.
2. The feedstock drying system of claim 1,
the heating and material stirring equipment further comprises: a shaft sleeve;
the wall of the drying bin is provided with at least one hole, and each heating material stirring pipe corresponds to one hole;
the shaft sleeve is sleeved on a corresponding hole of the heating material stirring pipe;
the transmission mechanism is arranged outside the drying bin;
and the second end of the heating material stirring pipe penetrates through the shaft sleeve and then is connected with the transmission mechanism.
3. The feedstock drying system of claim 1,
the transmission mechanism comprises: the driving gear is connected with the driven gear;
the driven gear is fixed at the second end of the heating material stirring pipe and is connected with the second end of the heating material stirring pipe;
the driving gear is connected with the motor;
the driving gear is connected with the driven gear through the transmission chain;
the motor rotates to drive the driving gear to rotate, the driving gear drives the driven gear to rotate through the transmission chain, and the driven gear drives the heating stirring pipe to rotate.
4. The feedstock drying system of claim 1,
the flue gas filtering device comprises: a bag-type dust collector;
the bag-type dust collector is provided with a gas inlet, a gas outlet and a solid outlet;
a gas inlet of the bag-type dust collector is connected with a smoke outlet of the drying bin;
the gas outlet of the bag-type dust collector is connected with the induced draft fan;
the solid outlet of the bag-type dust collector is connected with the second screw feeder;
the draught fan carries out convulsions, makes in the dry storehouse the flue gas process exhanst gas outlet's the gas inlet of sack cleaner gets into the sack cleaner, the sack cleaner is right the flue gas filters, and after the filtration the flue gas process the gas outlet of sack cleaner gets into in the draught fan, the draught fan discharges the flue gas, the sack cleaner filters the solid particle that produces behind the flue gas by the solid outlet of sack cleaner enters into second screw feeder, second screw feeder will the solid particle output.
5. The feedstock drying system of claim 4,
the bag-type dust collector comprises: a rotary valve;
the rotary valve is positioned at the solid outlet of the bag-type dust collector;
the rotary valve is used for discharging the solid particles from the solid outlet of the bag-type dust collector to the second spiral feeder.
6. The feedstock drying system of claim 1,
further comprising: a weighing and metering device;
the weighing and metering device is arranged in the drying bin;
the weighing and metering device is used for determining the weight of the raw materials in the drying bin.
7. The feedstock drying system of claim 1,
the raw material inlet of the drying bin is arranged at the top of the drying bin;
and the raw material outlet of the drying bin is arranged at the bottom of the drying bin.
8. The feedstock drying system of claim 1,
the shape of the drying bin comprises: the square opening is inverted trapezoid, the shape of a cuboid and the shape of a cylinder.
9. The feedstock drying system of claim 3,
the motor is used for periodically rotating forwards and reversely.
10. The feedstock drying system according to any one of claims 1 to 9,
at least one heating material stirring pipe is horizontally arranged in the drying bin;
and/or the presence of a gas in the gas,
there is at least one said heated kick-off pipe disposed vertically in said drying bin.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911143269.4A CN110887357A (en) | 2019-11-20 | 2019-11-20 | Raw material drying system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911143269.4A CN110887357A (en) | 2019-11-20 | 2019-11-20 | Raw material drying system |
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| CN110887357A true CN110887357A (en) | 2020-03-17 |
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