CN106766821B - Rice hull drying device - Google Patents
Rice hull drying device Download PDFInfo
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- CN106766821B CN106766821B CN201710045990.4A CN201710045990A CN106766821B CN 106766821 B CN106766821 B CN 106766821B CN 201710045990 A CN201710045990 A CN 201710045990A CN 106766821 B CN106766821 B CN 106766821B
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- box body
- steel wire
- temperature
- wire rope
- pipe
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/12—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft
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- 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
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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
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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
- F26B25/04—Agitating, stirring, or scraping devices
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a rice hull drying device, which comprises an upper spiral conveyor, a fan, a drying box and a lower spiral conveyor, wherein the drying box comprises an upper box body, a disturbing device and a lower box body, the upper end of the upper box body is provided with a feed pipe and an air outlet pipe respectively, a cloth spiral blade is arranged between the feed pipe and the air outlet pipe, the disturbing device comprises a suspension bracket, a steel wire rope, disturbing pieces and a limiting bracket, the steel wire rope is suspended on the suspension bracket, the disturbing pieces are arranged on the steel wire rope, the disturbing pieces on each steel wire rope and the disturbing pieces between the steel wire ropes are mutually staggered, and the bottom of the steel wire rope is connected with the limiting bracket; an air inlet pipe is arranged on the side face of the lower end of the lower box body, a discharge pipe is arranged at the bottom of the cylinder and connected with the lower screw conveyor, and a first temperature sensor and a second temperature sensor are respectively arranged in the upper box body and the discharge pipe. The invention makes full use of the waste heat of the pyrolysis furnace and can quickly and continuously remove the moisture in the rice hulls.
Description
Technical Field
The invention relates to a drying device, in particular to a rice hull drying device for pretreatment before rice hull pyrolysis.
Background
The problems of energy shortage, environmental pollution and the like always restrict the development of the economic society of China. The biomass can be used as a very friendly energy source, and can obviously improve the current embarrassment. The rice hulls are the most typical biomass, the rice hulls are high in yield in China, and the utilization rate of the rice hulls is low at present. The thermal pyrolysis of rice hulls is widely accepted, but when the rice hulls are pyrolyzed, the time for starting the pyrolysis reaction is delayed by the moisture contained in the raw materials, and a large part of the heat absorbed in the pyrolysis reaction is used for removing the moisture in the rice hulls, so that the thermal efficiency is reduced. Research shows that the drying pretreatment has a very positive effect on the thermal decomposition of the rice hulls.
The key point of solving the problem lies in providing a drying device which is rapid and continuous and can be particularly suitable for rice husks.
Disclosure of Invention
The invention aims to provide a rice husk drying device which can rapidly and continuously remove moisture in rice husks by using waste heat of a pyrolysis furnace.
In order to achieve the purpose, the technical scheme provided by the invention is as follows: the rice hull drying device comprises an upper spiral conveyor, a fan, a drying box and a lower spiral conveyor, wherein the upper spiral conveyor is driven by an upper variable frequency motor, and a discharge port of the upper spiral conveyor is connected with a feeding pipe of the drying box; the fan is connected with the air outlet pipe of the drying box; the lower screw conveyer is driven by a down-conversion motor, and a feed inlet of the lower screw conveyer is connected with a discharge pipe of the drying box.
The drying box comprises an upper box body, a disturbing device and a lower box body, wherein the upper box body is cylindrical, the upper end of the upper box body is respectively provided with a feed pipe and an air outlet pipe, a cloth helical blade is arranged between the feed pipe and the air outlet pipe, the cloth helical blade is driven by a medium frequency conversion motor, the cloth helical blade comprises a blade shaft and a blade, and a plurality of vent holes are formed in the blade; the disturbance device comprises a suspension frame, steel wire ropes, disturbance sheets and a limiting frame, wherein the steel wire ropes are suspended on the suspension frame, a plurality of disturbance sheets are arranged on the steel wire ropes, the disturbance sheets are disc-shaped round sheets, holes are formed in the middle of the round sheets and are sequentially arranged on the steel wire ropes through spherical hinges, the disturbance sheets on each steel wire rope and the disturbance sheets among the steel wire ropes are staggered, the bottom of each steel wire rope is connected with the limiting frame, and the limiting frame comprises an outer ring, a middle ring and a cross; the lower box body is a cylinder, an air inlet pipe is arranged on the side face of the lower end of the cylinder and extends into the box body, a downward hole is formed in the position, located in the middle of the box body, of the air inlet pipe, and a discharge pipe is arranged at the bottom of the cylinder.
Preferably, a first temperature sensor is arranged in the upper box body of the drying box, and a second temperature sensor is arranged in the discharge pipe of the lower box body.
According to the scheme, the rice hulls are conveyed into the drying box through the upper screw conveyor and accumulated in the upper box body, hot air from the pyrolysis furnace enters the drying box through the air inlet pipe in the lower box body, so that the temperature of the rice hulls is increased, moisture is evaporated primarily, the rice hulls after temperature rise are conveyed downwards through the distribution helical blades and are uniformly dispersed into the lower box body, then the rice hulls are further dispersed through the disturbance device and sideslip to another layer from one layer, the rice hulls fall layer by layer, the falling track is tortuous, the path is long, the speed is low, and the drying time is prolonged. On the other hand, during the falling of the rice hulls, each piece of rice hull is in hot air in the direction opposite to the falling direction of the rice hull, the drying surface area is large, the drying effect is enhanced, and finally, the rice hulls falling to the bottom are collected by the discharge pipe and are sent out through the lower screw conveyer; the hot air for drying enters from the air inlet pipe in the lower box body and flows upwards uniformly to dry the rice hulls, and the rice hulls are led out from the air outlet pipe of the upper box body through the fan to take away the water vapor.
The first temperature sensor in the upper box body measures the temperature of the rice hulls in the upper box body and returns the temperature to the computer, the temperature is compared with a given threshold value, when the temperature is higher than the threshold value, the computer controls the speed increasing of the up-conversion motor and the speed increasing of the middle-conversion motor to increase the rice hull updating speed in the upper box body; when the temperature is lower than the threshold value, the computer controls the speed of the up-conversion motor and the middle-conversion motor to be reduced, so that the rice husk updating speed of the upper box body is reduced, and the rice husks are fully heated.
The second temperature sensor in the lower box body measures the temperature of the rice hulls in the material pipe and returns the measured temperature to the computer, the measured temperature is compared with a given threshold value, when the temperature is higher than the threshold value, the computer controls the speed of the down-conversion motor to be increased, the rice hulls in the drying box are output in time, and the discharging speed is increased; when the temperature is lower than the threshold value, the computer controls the speed of the down-conversion motor to be reduced, the rice husk output speed is reduced, the rice husks accumulated on the discharge pipe are in the hot air atmosphere of the drying box at the moment, drying is continued, and the whole control system further ensures the drying effect of the rice husks.
Drawings
FIG. 1 is a structural schematic diagram of a rice hull drying device of the invention;
FIG. 2 is a schematic view of the structure of the cloth spiral blade of the present invention;
FIG. 3 is a schematic view of a perturbation apparatus according to the present invention;
FIG. 4 is a schematic view of the structure of the interference plate of the present invention;
FIG. 5 is a schematic view of the structure of the restricting frame of the present invention.
In the figure, 1 is a feeding pipe, 2 is a middle frequency conversion motor, 3 is an air outlet pipe, 4 is an upper box body, 5 is a cloth spiral blade, 6 is a lower box body, 7 is a disturbance device, 8 is an air inlet pipe, 9 is an air outlet pipe, 10 is a lower frequency conversion motor, 11 is a lower spiral conveyer, 12 is an upper frequency conversion motor, 13 is an upper spiral conveyer, 14 is a fan, 15 is a first temperature sensor, 16 is a second temperature sensor, 17 is a suspension bracket, 18 is a steel wire rope, 19 is a disturbance sheet, 20 is a limiting bracket, 21 is a drying box, 22 is a spherical hinge, 51 is a blade shaft, 52 is a blade, 53 is a vent hole, 201 is an outer ring, 202 is a middle ring, 203 is a cross.
Detailed Description
The embodiments of the present invention will be further explained with reference to the drawings.
Referring to fig. 1-5, the rice hull drying device of the invention comprises an upper screw conveyor 13, a fan 14, a drying box 21 and a lower screw conveyor 11, wherein the upper screw conveyor 13 is driven by an upper variable frequency motor 12, and a discharge port of the upper screw conveyor is connected with a feeding pipe 1 of the drying box; the fan 14 is connected with the air outlet pipe 3 of the drying box; the lower screw conveyor 11 is driven by a down-conversion motor 10, and a feed inlet of the lower screw conveyor is connected with a discharge pipe 9 of the drying box.
The drying box 21 comprises an upper box body 4, a disturbing device 7 and a lower box body 6, wherein the upper box body 4 is cylindrical, the upper ends of the upper box body 4 are respectively provided with a feeding pipe 1 and an air outlet pipe 3, a cloth helical blade 5 is arranged between the feeding pipe 1 and the air outlet pipe 3, the cloth helical blade 5 is driven by a variable frequency motor 2, the cloth helical blade 5 comprises a blade shaft 51 and a blade 52, and a plurality of vent holes 53 are formed in the blade 52; a first temperature sensor 15 is arranged in the upper box body 4; the disturbance device 7 comprises a suspension frame 17, a steel wire rope 18, disturbance pieces 19 and a limiting frame 20, the steel wire rope 18 is suspended on the suspension frame 17, the steel wire rope 18 is provided with a plurality of disturbance pieces 19, the disturbance pieces 19 are disc-shaped round pieces, holes are formed in the middle of the round pieces and are sequentially fixed on the steel wire rope 18 through a spherical hinge 22, the disturbance pieces on each steel wire rope and the disturbance pieces among the steel wire ropes are staggered, and the bottom of the steel wire rope 18 is connected with the limiting frame 20; the limiting frame 20 comprises an outer ring 201, a middle ring 202 and a cross 203; the lower box body 6 is a cylinder, an air inlet pipe 8 is arranged on the side face of the lower end of the cylinder, the air inlet pipe 8 extends into the lower box body 6, a downward hole is formed in the middle of the lower box body 6, a discharge pipe 9 is arranged at the bottom of the cylinder, and a second temperature sensor 16 is arranged in the discharge pipe 9.
When the rice hull drying device works, rice hulls are conveyed into a drying box 21 by an upper screw conveyor 13 and accumulated in an upper box body 4, hot gas from a pyrolysis furnace enters the drying box 21 through an air inlet pipe 8 in a lower box body 6, so that the temperature of the rice hulls is increased, moisture is evaporated primarily, the heated rice hulls are conveyed downwards by a cloth spiral blade 5 and are uniformly dispersed into the lower box body 6, then the rice hulls are further dispersed by a disturbance piece 19 and slide to another layer from one layer, and fall layer by layer, the falling track is tortuous, the path is long, the speed is low, the drying time is prolonged, on the other hand, each rice hull is in hot air opposite to the falling direction of the rice hulls in the falling process, the drying surface area is large, the drying effect is enhanced, in addition, the ball hinges 22 can enable the disturbance piece 19 to swing freely, the disturbance piece 19 is ensured not to accumulate the rice hulls, and the uniform distribution of the rice hulls is facilitated; finally, the rice husks falling into the bottom are collected by a discharge pipe 9 and are sent out by a lower spiral conveyor 11; hot air for drying enters from an air inlet pipe 8 in the lower box body 6 and flows upwards uniformly to dry the rice husks, the air outlet pipe 3 on the upper box body 4 is led out through a fan 14 to take away water vapor, and on the other hand, the fan 14 causes local negative pressure in the upper box body 4, so that continuous feeding of the rice husks is facilitated. A first temperature sensor 15 positioned in the upper box body 4 measures the temperature of the rice husks in the upper box body 4 and returns the temperature to the computer, the temperature is compared with a given threshold value, and when the temperature is higher than the threshold value, the computer controls the speed of the up-conversion motor 12 and the speed of the middle-conversion motor 2 to be increased, and the rice husk updating speed in the upper box body 4 is increased; when the temperature is lower than the threshold value, the computer controls the speed of the up-conversion motor 12 and the middle-conversion motor 2 to be reduced, so that the updating speed of the rice hulls in the upper box body 4 is reduced, and the temperature of the rice hulls is fully raised. A second temperature sensor positioned in the lower box body 6 measures the temperature of the rice hulls in the material pipe 9 and returns the temperature to the computer, the temperature is compared with a given threshold value, when the temperature is higher than the threshold value, the computer controls the speed of the down-conversion motor 10 to be increased, the rice hulls in the drying box are output in time, and the discharging speed is increased; when the temperature is lower than the threshold value, the computer controls the down-conversion motor 10 to reduce the speed and the rice husk output speed, the rice husks accumulated on the discharge pipe are in the hot air atmosphere of the drying box at the moment and continue to be dried, and the whole control system further ensures the drying effect of the rice husks.
The rice hull drying device has the characteristics of small volume, continuous drying process, high drying efficiency, high utilization rate of waste heat of the pyrolysis furnace and the like, and has a very positive effect on further pyrolysis of the rice hulls.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
Claims (1)
1. The rice hull drying device consists of an upper spiral conveyor (13), a fan (14), a drying box (21) and a lower spiral conveyor (11), and is characterized in that the upper spiral conveyor (13) is driven by an upper variable frequency motor (12), and a discharge port of the upper spiral conveyor is connected with a feeding pipe (1) of the drying box (21); the fan (14) is connected with the air outlet pipe (3) on the drying box (21); the lower screw conveyor (11) is driven by a down-conversion motor (10), and a feed inlet of the lower screw conveyor is connected with a discharge pipe (9) of the drying box (21);
the drying box (21) comprises an upper box body (4), a disturbing device (7) and a lower box body (6), the upper box body (4) is cylindrical, the upper ends of the upper box body are respectively provided with a feeding pipe (1) and an air outlet pipe (3), a cloth spiral blade (5) is arranged between the feeding pipe (1) and the air outlet pipe (3), the cloth spiral blade (5) is driven by a variable frequency motor (2), the cloth spiral blade (5) comprises a blade shaft (51) and a blade (52), the blade (52) is provided with a plurality of vent holes (53), and a first temperature sensor (15) is arranged in the upper box body (4);
the disturbance device (7) comprises a suspension bracket (17), a steel wire rope (18), disturbance pieces (19) and a limiting frame (20), the steel wire rope (18) is suspended on the suspension bracket (17), the steel wire rope (18) is provided with a plurality of disturbance pieces (19), the disturbance pieces (19) are disc-shaped wafers, holes are punched in the wafers, the wafers are sequentially fixed on the steel wire rope (18) through spherical hinges (22), the disturbance pieces on each steel wire rope and the disturbance pieces between the steel wire ropes are staggered, the bottom of the steel wire rope (18) is connected with the limiting frame (20), and the limiting frame (20) comprises an outer ring (201), a middle ring (202) and a cross (203);
the lower box body (6) is a cylinder, an air inlet pipe (8) is arranged on the side face of the lower end of the cylinder, the air inlet pipe (8) extends into the lower box body (6), a downward hole is formed in the middle of the lower box body (6), a discharge pipe (9) is arranged at the bottom of the cylinder, and a second temperature sensor (16) is arranged at the discharge pipe (9);
the first temperature sensor (15) measures the temperature of the rice hulls in the upper box body (4) and returns the temperature to the computer, the temperature is compared with a given threshold value, and when the temperature is higher than the threshold value, the computer controls the speed of the up-conversion motor (12) and the speed of the middle-conversion motor (2) to be increased, so that the rice hull updating speed in the upper box body (4) is increased; when the temperature is lower than a threshold value, the computer controls the speed of the up-conversion motor (12) and the speed of the middle-conversion motor (2) to be reduced, so that the rice hull updating speed in the upper box body (4) is reduced, and the temperature of the rice hulls is fully raised;
the second temperature sensor (16) measures the temperature of the rice hulls in the tapping pipe (9) and returns it to the computer, which, in comparison with a given threshold value, controls the down-conversion motor (10) to increase its speed when the temperature is above the threshold value; when the temperature is below a threshold, the computer controls the down-conversion motor (10) to reduce the speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710045990.4A CN106766821B (en) | 2017-01-20 | 2017-01-20 | Rice hull drying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710045990.4A CN106766821B (en) | 2017-01-20 | 2017-01-20 | Rice hull drying device |
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| Publication Number | Publication Date |
|---|---|
| CN106766821A CN106766821A (en) | 2017-05-31 |
| CN106766821B true CN106766821B (en) | 2022-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710045990.4A Active CN106766821B (en) | 2017-01-20 | 2017-01-20 | Rice hull drying device |
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| CN (1) | CN106766821B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108194928B (en) * | 2018-02-07 | 2024-02-13 | 李观德 | Garbage pyrolysis method and multi-layer hanging arm type garbage pyrolysis furnace |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105509425A (en) * | 2016-01-07 | 2016-04-20 | 福建省农业科学院水稻研究所 | Seed drying room and seed drying method |
| CN106123521A (en) * | 2016-07-21 | 2016-11-16 | 柳州合科技有限公司 | A kind of efficiently air-draft-type grain drying device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1663351A1 (en) * | 1989-02-22 | 1991-07-15 | Львовский Лесотехнический Институт | Dryer for fine wood waste |
| CN2105650U (en) * | 1991-07-16 | 1992-05-27 | 马东生 | Adjustable oblique board vibration type multi-purpose dryer |
| JP6079444B2 (en) * | 2013-05-31 | 2017-02-15 | 井関農機株式会社 | Grain dryer control equipment |
| CN105727801A (en) * | 2014-12-10 | 2016-07-06 | 天津天成昇科技有限公司 | Dampness-removing feed stirrer |
| RU159291U1 (en) * | 2015-06-24 | 2016-02-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Волгоградский государственный технический университет" (ВолгГТУ) | PULSING LAYER DRYER |
| CN105066653B (en) * | 2015-08-14 | 2017-11-07 | 江苏雪梅制冷设备有限公司 | A kind of heat-pump-type tail recuperation of heat penetrates adverse current fluidized dryer |
| CN206440106U (en) * | 2017-01-20 | 2017-08-25 | 安徽理工大学 | Rice husk drying device |
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2017
- 2017-01-20 CN CN201710045990.4A patent/CN106766821B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105509425A (en) * | 2016-01-07 | 2016-04-20 | 福建省农业科学院水稻研究所 | Seed drying room and seed drying method |
| CN106123521A (en) * | 2016-07-21 | 2016-11-16 | 柳州合科技有限公司 | A kind of efficiently air-draft-type grain drying device |
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| CN106766821A (en) | 2017-05-31 |
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