CN112129089A - Hierarchical formula living beings cylinder drying-machine - Google Patents
Hierarchical formula living beings cylinder drying-machine Download PDFInfo
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- CN112129089A CN112129089A CN202011136440.1A CN202011136440A CN112129089A CN 112129089 A CN112129089 A CN 112129089A CN 202011136440 A CN202011136440 A CN 202011136440A CN 112129089 A CN112129089 A CN 112129089A
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- cylinder
- drying
- inner cylinder
- side wall
- heat exchange
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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
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/18—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs
- F26B17/20—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs the axis of rotation being horizontal or slightly inclined
- F26B17/205—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs the axis of rotation being horizontal or slightly inclined with multiple chambers, e.g. troughs, in superimposed arrangement
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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
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
- F26B21/002—Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger
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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
- F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
- F26B21/04—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure
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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
- F26B25/005—Treatment of dryer exhaust 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
- F26B25/04—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
Abstract
The invention relates to a hierarchical biomass drum dryer, which comprises a base, a drying drum arranged on the base, a power device arranged on the base and a heat source, wherein the drying drum comprises an inner drum and an outer drum sleeved on the inner drum; the power device drives the inner cylinder to rotate; a first spiral plate is arranged on the outer side wall of the inner barrel, a second spiral plate is arranged on the inner side wall, and the spiral directions of the first spiral plate and the second spiral plate are opposite; a feeding hole is formed in the wall of the inner cylinder, which is far away from the discharge hole, and a scraping hopper is arranged at the feeding hole; a feed inlet is arranged on the side wall of the outer barrel close to the discharge outlet, and a feed hopper is arranged at the feed inlet; the air outlet of the heat source extends into the inner cylinder through the discharge hole; the invention can remove water vapor and dust impurities generated by drying the biomass raw material, and can recycle energy in high-temperature water vapor for many times, thereby reducing the drying cost.
Description
Technical Field
The invention belongs to the field of dryers, and particularly relates to the field of hierarchical biomass drum dryers.
Background
The drying of biomass raw materials is a key part of the industrial application of biomass, and the drying state of the raw materials directly influences the efficiency and the income of the subsequent process; the biomass has certain limitation in the use process due to high moisture, and needs to be dried and pretreated; at present, large drying boxes and tunnel drying exist, for example, hot air is used for heating the interior of a roller and simultaneously moist air is blown away to achieve the purpose of drying; however, problems exist in the drying process, and in the drying process of the current circulating biomass dryer, the biomass is dried at one time, so that the moisture released by drying cannot be immediately dried, the moisture content in the dryer is increased, and the drying rate is reduced; meanwhile, the existing drying cylinder is very long in length, the temperature requirement on a heat source is very high, otherwise, the drying purpose cannot be achieved, but the excessive temperature easily causes overheating of the part of the drying machine, raw materials are carbonized, and ignition is caused when the raw materials are serious; in addition, the space inside the roller is large, the required hot air quantity is large, hot air is easy to cause no-load, and hot air generated by drying can be discharged frequently, so that energy is wasted, and the energy consumption is high.
Disclosure of Invention
In order to solve the problems, the invention achieves the purposes through the following technical scheme:
a hierarchical biomass roller dryer comprises a base, a drying cylinder arranged on the base, a power device arranged on the base and a heat source, wherein the drying cylinder consists of an inner cylinder and an outer cylinder; the power device drives the inner cylinder to rotate; a first spiral plate is arranged on the outer side wall of the inner barrel, a second spiral plate is arranged on the inner side wall, and the spiral directions of the first spiral plate and the second spiral plate are opposite; a feeding hole is formed in the wall of the inner cylinder, which is far away from the discharge hole, and a scraping hopper is arranged at the feeding hole; a feed inlet is formed in the side wall, close to the discharge outlet, of the outer barrel, and a feed hopper is arranged at the feed inlet; and the air outlet of the heat source extends into the inner cylinder through the discharge hole.
As a further optimization scheme of the invention, the power device comprises a motor and a riding wheel, wherein a wheel belt is arranged on the outer side wall of the inner cylinder extending out of the outer cylinder, and the riding wheel is tightly contacted with the wheel belt.
As a further optimized scheme of the invention, the outer cylinder is covered with a heat insulation layer.
As a further optimization scheme of the invention, a heat exchange chamber is arranged at one end of the outer cylinder, which is far away from the discharge port, a through hole is arranged on the side wall of the inner cylinder, which is far away from the discharge port, the inner cylinder is communicated with the heat exchange chamber through the through hole, and a condensing plate is obliquely arranged on the side wall, which is opposite to the through hole, in the heat exchange chamber; a liquid outlet is formed in the bottom of the heat exchange chamber, and a vent pipe is communicated between the top of the heat exchange chamber and the heat source.
As a further optimization scheme of the invention, a heat exchanger is fixedly arranged in the through hole, and the whole heat exchanger is of a 'Laval tube' structure with a cross section from large to small and then from small to large after reaching a narrow throat.
As a further optimization scheme of the invention, a plurality of heat exchange pipelines are distributed in the heat exchange chamber and are communicated with the heat exchanger.
The invention has the beneficial effects that:
1) the invention can remove the water vapor and dust impurities generated by drying the biomass raw material, and can recycle the energy in the high-temperature water vapor for many times, and the recycled energy can greatly reduce the energy consumed during drying, thereby reducing the drying cost and further reducing the production cost of the biomass particles.
2) By means of the design of the structure, the processes of feeding, stirring by the drying cylinder, drying and discharging can be continuously carried out in a non-stop state, and the working efficiency is high;
3) the feeding hopper is designed to be short and close to the ground, so that feeding is facilitated continuously, and the situation that feeding is difficult due to the fact that a feeding port is arranged at the middle upper part of equipment in the prior art is avoided;
4) the design of the double drums can reduce the length of the drying drum and save the floor area of the drying equipment.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic sectional view of a drying drum and a heat exchange chamber according to the present invention;
FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2 according to the present invention;
FIG. 4 is a schematic cross-sectional view of a heat exchanger according to the present invention;
FIG. 5 is a schematic perspective view of a portion of a heat exchanger according to the present invention;
in the figure: 1. a base; 2. a drying drum; 21. an inner barrel; 211. a discharge port; 212. a first spiral plate; 213. a second spiral plate; 214. a feeding port; 215. scraping the hopper; 216. a belt wheel; 217. a through hole; 22. an outer cylinder; 221. a feed inlet; 222. a feed hopper; 223. a thermal insulation layer; 3. a power plant; 31. a motor; 32. a riding wheel; 4. a heat source; 5. a heat exchange chamber; 51. a condensing plate; 52. a liquid outlet; 6. a breather pipe; 7. a heat exchanger; 8. a heat exchange conduit.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
Example 1
As shown in fig. 1 to 5, a hierarchical biomass roller dryer comprises a base 1, a drying drum 2 arranged on the base 1, a power device 3 arranged on the base 1, and a heat source 4, wherein the drying drum 2 is composed of an inner drum 21 and an outer drum 22, the outer drum 22 is sleeved on the inner drum 21, one end of the inner drum 21 is embedded in the side wall of the outer drum 22 in a rolling manner, the other end extends out of the outer drum 22, and a discharge port 211 is arranged on the end portion of one side of the inner drum 21 extending out of the outer drum 22;
a first spiral plate 212 is arranged on the outer side wall of the inner cylinder 21, a second spiral plate 213 is arranged on the inner side wall, and the spiral directions of the first spiral plate 222 and the second spiral plate 223 are opposite; in addition, a feeding port 214 is arranged on the wall of the inner cylinder 21 on the side far away from the discharge port 211, and a scraping hopper 215 is arranged at the feeding port 214;
a feed inlet 221 is arranged on the side wall of the outer cylinder 22 close to the discharge outlet 211, and a feed hopper 222 is arranged at the feed inlet 221; preferably, in order to reduce the heat loss in the drying drum, a heat insulation layer 223 is covered on the outer drum 22;
the power device 3 comprises a motor 31 and a riding wheel 32, a belt 216 is arranged on the outer side wall of the inner cylinder 21 extending out of the outer cylinder 22, the riding wheel 32 is in close contact with the belt 216, when the power device 3 works, the motor drives the riding wheel to rotate, and the riding wheel 32 drives the belt 216 to rotate, so that the inner cylinder 21 rotates;
the heat source 4 is used as a source of hot air of the drying cylinder, during assembly, an air outlet of the heat source 4 extends into the inner cylinder through the material outlet 211, preferably, in order to improve the efficiency of the heat source in exhausting air to the inner cylinder, an air blower can be additionally arranged at the air outlet of the heat source, and then the hot air forms faster air flow in the inner cylinder through the blast action of the air blower; furthermore, in order to prevent the overflow of hot air, the air outlet of the heat source extends into the middle end of the inner cylinder, and at the moment, the air outlet of the heat source is closer to the air inlet of the heat exchanger 7, so that the venturi effect is more favorably formed;
a heat exchange chamber 5 is arranged at one end of the outer cylinder 22 far away from the discharge hole 211, a through hole 217 is arranged on the side wall of the inner cylinder 21 far away from the discharge hole 211, the inner cylinder 21 is communicated with the heat exchange chamber 5 through the through hole 217, a liquid outlet 52 is arranged at the bottom of the heat exchange chamber 5, and a vent pipe 6 is communicated between the top of the heat exchange chamber 5 and the heat source 4;
when the drying cylinder works, the dried moisture and various dust particles brought by the raw materials are mixed to form a high-temperature water-vapor mixture, and in order to remove impurities of the water-vapor mixture, a condensing plate 51 is obliquely arranged on the inner side wall of the heat exchange chamber opposite to the through hole; after the high-temperature water-vapor mixture contacts the condensing plate 51, the high-temperature water-vapor mixture is immediately formed into condensed water, and the condensed water simultaneously contains dust impurities in the water vapor, and then falls into the bottom of the heat exchange chamber and flows out of the heat exchange chamber through the liquid outlet 52; the structure has the effects of dewatering and dedusting;
furthermore, the high-temperature water-vapor mixture contains a large amount of heat, if the high-temperature water-vapor mixture is directly contacted with a condensing plate to form condensed water, huge waste of energy can be caused, and meanwhile, the ventilation efficiency between the drying cylinder and the heat exchange chamber is not high due to the structure of a ventilation hole, so that the heat exchanger 7 is fixedly arranged in the through hole 217 for saving energy used for drying, and the whole heat exchanger 7 is of a 'Laval pipe' structure with a cross section from large to small and a cross section from small to large after reaching a narrow throat; the structure is adopted to utilize the principle of gas flow, namely, the gas movement follows the principle that when fluid moves in a pipe, the flow velocity at the small part of the section is high, and the flow velocity at the large part of the section is low; therefore, when the high-temperature flue gas passes through a place with a small cross section of the heat exchange tube, the flow velocity of the flue gas is increased, particles in high-temperature water vapor can enter a heat exchange chamber behind the heat exchange tube, then the high-temperature water vapor enters a position with a large cross section, the flow velocity is reduced, part of pure hot air can directly rise and enter the top of the heat exchange chamber, part of water vapor containing dust is heavier, and the pure hot air can directly contact with a condensing plate to form condensed water containing impurities and fall down;
further, in order to recover the energy of the hot air at the top of the heat exchange chamber, a plurality of heat exchange pipelines 8 are distributed on the inner side wall of the heat exchange chamber 5, and the heat exchange pipelines 8 are communicated with a heat exchanger 7; moreover, the heat exchange pipeline adopts hemispherical heat pipes, so that heat radiation in the furnace can be reflected, the contact area of the flue gas and the heat exchange pipes is increased, and the heat loss can be reduced.
Instructions for use of the device:
when the device is used, firstly, the heat source is kept working, so that the inner cylinder is raised to a certain temperature, then the motor 31 is started, the motor 31 can drive the inner cylinder to rotate through the riding wheel 32, the outer cylinder 22 is kept still, then the biomass raw material to be dried is poured into the feed hopper on one side of the outer cylinder, the bottom of the feed hopper 222 is communicated with the feed inlet 221, then the biomass raw material can enter the space between the outer cylinder and the inner cylinder of the drying cylinder through the feed inlet, the outer side wall of the inner cylinder 21 is provided with the first spiral plate 212, the first spiral plate 212 can drive the biomass raw material to advance towards one side far away from the feed inlet, meanwhile, the temperature radiated in the inner cylinder can continuously pre-dry the biomass raw material until the biomass raw material advances to the feed inlet, then the biomass raw material can enter the inner cylinder from the feed inlet 214 under the action of the scraping hopper 215, then under the action of the second spiral plate 213 on, the biomass raw material is continuously moved leftwards, in the moving process, because the gas outlet of the heat source extends into the middle section of the inner cylinder, the section of the biomass raw material close to the through hole can be roasted by the high temperature of the heat source, the roasted water vapor directly moves towards the direction of the heat exchange chamber under the action of wind power, when the biomass raw material moves to the front half section close to the discharge hole, the biomass raw material is continuously dried by depending on the residual temperature, and at the moment, the biomass raw material is prevented from being roasted by the high temperature for a long time until the biomass raw material falls out of the discharge hole, so that the whole drying process of the biomass raw material is completed; meanwhile, in the process of the heat exchange chamber part, the generated high-temperature water vapor mixture with various dust particles moves to the heat exchange chamber under the action of wind power, and most of the high-temperature water vapor containing dust impurities is condensed and falls down under the action of a condensing plate after passing through the heat exchanger in a 'Laval pipe' structure, so that the effects of dedusting and draining are realized; meanwhile, when high-temperature water vapor passes through the heat exchanger, part of heat can be recovered by the heat exchanger, and the heat is recovered for the first time; when part of high-temperature air in the heat exchange chamber can directly rise, heat is further recovered by the heat exchange pipeline in the heat exchange chamber, and the heat is recovered for the second time; the hot air rising to the top of the heat exchange chamber moves into the heat source along the vent hole and enters the drying cylinder again under the heating action of the heat source, and the part of the hot air has high temperature, so that compared with the direct heating of cold air, the residual heat is recovered indirectly, and the third heat recovery is realized;
the equipment of the invention adopts a special drying cylinder structure and the position of a heat source air inlet, and three obvious processes are formed in the drying process of biomass raw materials, namely, the first process is a pre-drying process between an inner cylinder and an outer cylinder, the second process is a high-temperature drying process of the inner cylinder close to a heat exchange chamber, and the second process is a residual-temperature drying process of the inner cylinder close to a discharge hole; through the segmented drying process, the problem that the traditional drying equipment is wet in the outer coke generated by high-temperature baking from feeding can be effectively avoided.
According to the biomass drying device, the energy in high-temperature water vapor can be recycled for many times while water vapor and dust impurities generated during biomass drying are removed, the energy consumed during drying can be greatly reduced through the recycled energy, the drying cost is further reduced, and the production cost of biomass particles can be further reduced;
in addition, regarding the heat recovery structure part, a cyclone separator is often used in the prior art to separate high-temperature water vapor, high-temperature air, dust impurities and water vapor are separated, and then the separated high-temperature air is introduced into a heat source of a dryer, so that energy is saved; in fact, the specific heat capacity of water is far greater than that of air, a large amount of heat is absorbed by water vapor, and the heat carried by the separated air is quite limited; the power of the cyclone separator is very large, the energy consumption is very serious, and the recovered energy source can not make up the loss of the cyclone separator during working; the structure of the related heat exchanger and the heat exchange chamber is arranged, so that the energy of high-temperature water vapor can be recovered for many times under the condition of not using a cyclone separator, the recovered heat is far greater than the energy recovered by the traditional method, the power of the condensing plate is far lower than that of the cyclone separator, and the energy consumption is very low;
therefore, the invention can realize better drying effect, avoid the problem of external coke and internal humidity generated by high-temperature baking from feeding of the traditional drying equipment, and simultaneously can greatly reduce energy consumed during drying, thereby further reducing the production cost of the biomass particles.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (6)
1. The utility model provides a hierarchical formula living beings cylinder drying-machine which characterized in that: the drying device comprises a base (1), a drying cylinder (2) arranged on the base (1), a power device (3) arranged on the base (1) and a heat source (4), wherein the drying cylinder (2) consists of an inner cylinder (21) and an outer cylinder (22), the outer cylinder (22) is sleeved on the inner cylinder (21), one end of the inner cylinder (21) is embedded in the side wall of the outer cylinder (22) in a rolling manner, the other end of the inner cylinder extends out of the outer cylinder (22), and a discharge hole (211) is formed in the end part of one side of the inner cylinder (21) extending out of the outer cylinder (22); the power device (3) drives the inner cylinder (21) to rotate; a first spiral plate (212) is arranged on the outer side wall of the inner barrel (21), a second spiral plate (213) is arranged on the inner side wall, and the spiral directions of the first spiral plate (222) and the second spiral plate (223) are opposite; a feeding opening (214) is formed in the wall of the inner cylinder (21) on the side far away from the discharging opening (211), and a scraping hopper (215) is arranged at the feeding opening (214); a feed inlet (221) is formed in the side wall, close to the discharge outlet (211), of the outer cylinder (22), and a feed hopper (222) is arranged at the feed inlet (221); and the air outlet of the heat source (4) extends into the inner cylinder through the discharge hole (211).
2. The staged biomass tumble dryer of claim 1, wherein: the power device (3) comprises a motor (31) and a riding wheel (32), a wheel belt (216) is arranged on the outer side wall of the inner barrel (21) extending out of the outer barrel (22), and the riding wheel (32) is tightly contacted with the wheel belt (216).
3. The staged biomass tumble dryer of claim 2, characterized in that: the outer barrel (22) is covered with a heat insulation layer (223).
4. The staged biomass tumble dryer of claim 3, wherein: a heat exchange chamber (5) is arranged at one end, far away from the discharge hole (211), of the outer cylinder (22), a through hole (217) is formed in the side wall of one side, far away from the discharge hole (211), of the inner cylinder (21), the inner cylinder (21) is communicated with the heat exchange chamber (5) through the through hole (217), and a condensing plate (51) is obliquely arranged on the side wall, opposite to the through hole (217), in the heat exchange chamber (5); a liquid outlet (52) is arranged at the bottom of the heat exchange chamber (5), and a vent pipe (6) is communicated between the top of the heat exchange chamber and the heat source (4).
5. The staged biomass tumble dryer of claim 4, wherein: the heat exchanger (7) is fixedly arranged in the through hole (217), and the heat exchanger (7) is of a 'Laval tube' structure with a cross section from large to small to a narrow throat and then from small to large.
6. The staged biomass tumble dryer of claim 5, wherein: a plurality of heat exchange pipelines (8) are distributed on the inner side wall of the heat exchange chamber (5), and the heat exchange pipelines (8) are communicated with the heat exchanger (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011136440.1A CN112129089A (en) | 2020-10-22 | 2020-10-22 | Hierarchical formula living beings cylinder drying-machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011136440.1A CN112129089A (en) | 2020-10-22 | 2020-10-22 | Hierarchical formula living beings cylinder drying-machine |
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| Publication Number | Publication Date |
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| CN112129089A true CN112129089A (en) | 2020-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011136440.1A Pending CN112129089A (en) | 2020-10-22 | 2020-10-22 | Hierarchical formula living beings cylinder drying-machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113503696A (en) * | 2021-07-02 | 2021-10-15 | 郑州笨农农业科技有限公司 | Vertical circulating suspension air dryer and material air drying method thereof |
-
2020
- 2020-10-22 CN CN202011136440.1A patent/CN112129089A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113503696A (en) * | 2021-07-02 | 2021-10-15 | 郑州笨农农业科技有限公司 | Vertical circulating suspension air dryer and material air drying method thereof |
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