CN112503869A - Negative pressure drying device - Google Patents
Negative pressure drying device Download PDFInfo
- Publication number
- CN112503869A CN112503869A CN202011220422.1A CN202011220422A CN112503869A CN 112503869 A CN112503869 A CN 112503869A CN 202011220422 A CN202011220422 A CN 202011220422A CN 112503869 A CN112503869 A CN 112503869A
- Authority
- CN
- China
- Prior art keywords
- cavity
- drying
- heating plates
- negative pressure
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
- F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B9/00—Preservation of edible seeds, e.g. cereals
- A23B9/08—Drying; Subsequent reconstitution
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/04—Heating arrangements using electric heating
- F26B23/06—Heating arrangements using electric heating resistance heating
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
-
- 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
- F26B2200/06—Grains, e.g. cereals, wheat, rice, corn
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Molecular Biology (AREA)
- Health & Medical Sciences (AREA)
- Zoology (AREA)
- Chemical & Material Sciences (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Sustainable Development (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention provides a negative pressure drying device.A partition plate is arranged in a shell to divide the interior of the shell into a drying cavity and a condensing cavity; a feed port is arranged at the top of the drying cavity, a first valve is arranged at the feed port, a discharge port is arranged at the bottom of the drying cavity, and a second valve is arranged at the discharge port; the shell is provided with an air extraction opening which is communicated with the drying cavity; the heating plates are arranged in the drying cavity, any adjacent heating plates are spaced at a preset distance, and the feeding hole and the discharging hole are communicated through a gap between any adjacent heating plates; the partition board is provided with a plurality of steam exhaust holes, and the condensation cavity is communicated with the gap through the plurality of steam exhaust holes; the fan is arranged on the partition plate and is positioned in the condensation cavity; the refrigerating pipe is arranged on the inner wall of the condensing cavity; a water outlet is arranged at the bottom of the condensation cavity and provided with a third valve; negative pressure is formed in the drying cavity, so that the boiling point of moisture in the grain is reduced, the moisture in the grain can be quickly evaporated out at a higher drying temperature, and the grain cannot explode due to the fact that the drying temperature is not high.
Description
Technical Field
The invention belongs to the technical field of dryers, and particularly relates to a negative pressure drying device.
Background
The existing grain drying equipment mostly adopts the heated high-temperature air to heat the flowing grains, and the water in the grains is forced to evaporate. The drying method has the defects that the temperature of high-temperature air needs to be increased for higher drying efficiency, and the higher temperature easily causes grain to explode, so that the crushing rate of the dried grain is higher. Therefore, improvement of the drying method is urgently needed.
Disclosure of Invention
In order to solve the problems, the invention provides a negative pressure drying device which comprises a shell, a partition plate, a plurality of heating plates, a fan and a refrigerating pipe, wherein the shell is provided with a plurality of heating plates;
the baffle is arranged in the shell to separate the interior of the shell into a drying cavity and a condensing cavity;
a feed port is arranged at the top of the drying cavity, a first valve is arranged at the feed port, a discharge port is arranged at the bottom of the drying cavity, and a second valve is arranged at the discharge port;
the shell is provided with an air extraction opening which is communicated with the drying cavity;
the heating plates are arranged in the drying cavity, any adjacent heating plates are spaced at a preset distance, and the feeding hole and the discharging hole are communicated through a gap between any adjacent heating plates;
the partition board is provided with a plurality of steam exhaust holes, and the condensation cavity is communicated with the gap through the plurality of steam exhaust holes;
the fan is arranged on the partition plate and is positioned in the condensation cavity;
the refrigerating pipe is arranged on the inner wall of the condensing cavity;
the bottom of the condensation cavity is provided with a water outlet which is provided with a third valve.
Preferably, the refrigerant pipe is mounted on an inner wall opposite to the fan.
Preferably, the thermal conductivity of the separator is λ, λ < 0.05W/(m.K).
Preferably, be equipped with first sheet rubber and second sheet rubber in a plurality of steam vents respectively, first sheet rubber and second sheet rubber support to lean on the hole shutoff of exhausting.
Preferably, the negative pressure drying device further comprises a hygrometer, and a detection probe of the hygrometer is positioned in the steam exhaust hole.
Preferably, the heating plate is internally hollow to form a cavity, and is provided with a plurality of air holes communicated with the cavity.
Preferably, the chamber is communicated with the condensation chamber through a steam exhaust hole.
Preferably, a plurality of hot plates divide into a plurality of first hot plates and a plurality of second hot plate, and a plurality of first hot plates are close to feed inlet one side, and a plurality of second hot plates are close to discharge gate one side, are equipped with the fourth valve between a plurality of first hot plates and a plurality of second hot plates.
According to the negative pressure drying device, after the grains enter the drying cavity, air in the drying cavity is sucked out, negative pressure is formed in the drying cavity, so that the boiling point of moisture in the grains is reduced, the moisture in the grains can be quickly evaporated out without higher drying temperature, and the phenomenon of waist burst of the grains cannot occur due to the fact that the drying temperature is not high.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
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 described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 shows a schematic structural view of a negative pressure drying device according to an embodiment of the invention;
FIG. 2 shows a cross-sectional view of a negative pressure drying device according to an embodiment of the invention;
FIG. 3 shows a cross-sectional view of a negative pressure drying device according to an embodiment of the invention;
FIG. 4 shows a cross-sectional view of a heating plate according to an embodiment of the present invention;
FIG. 5 shows a schematic view of the structure of a first rubber sheet and a second rubber sheet in an embodiment of the invention;
fig. 6 shows a schematic structural diagram of a negative pressure drying device in another embodiment.
In the figure, 1-shell, 11-drying cavity, 12-condensing cavity, 13-feeding hole, 14-discharging hole, 15-pumping hole, 16-pumping hole, 17-discharging hole, 2-clapboard, 21-exhausting hole, 3-heating plate, 31-first heating plate, 32-second heating plate, 33-air hole, 34-cavity, 4-fan, 5-cover body, 61-first rubber sheet and 62-second rubber sheet.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely 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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a negative pressure drying device which can be used for drying various grains and also can be used for drying other materials, such as plastics, mineral powder and the like. The negative pressure drying device mainly comprises a shell 1, a partition plate 2, a plurality of heating plates 3, a fan 4 and a refrigerating pipe.
Referring to fig. 1 to 3, a casing 1 in this embodiment is substantially a cubic structure, the casing 1 is made of a metal material, a partition plate 2 is vertically fixed in the casing 1, the inside of the casing 1 is partitioned into a drying cavity 11 and a condensing cavity 12, both the drying cavity 11 and the condensing cavity 12 are of a cubic structure, the volume of the drying cavity 11 is larger than that of the condensing cavity 12, the drying cavity 11 is used for drying grains, and the condensing cavity 12 is used for collecting moisture evaporated from the grains in the drying cavity 11.
The drying chamber 11 is provided with a feeding hole 13 at the top, and the feeding hole 13 is provided with a first valve, which is only exemplified by a cover plate in this embodiment. The first valve is opened, and the grains can enter the drying cavity 11 through the feed inlet 13. After the first valve is closed, the sealing performance is very good, and gas cannot pass through the feed port 13. The bottom of the drying cavity 11 is provided with a discharge hole 14, and the discharge hole 14 is provided with a second valve, which is only exemplified by a cover plate in this embodiment. The second valve is opened, and the grains in the drying cavity 11 are discharged through the discharge hole 14. When the second valve is closed, the sealing is very good and gas cannot pass through the outlet 14.
A plurality of hot plates 3 are vertically fixed in stoving chamber 11 and are parallel to each other, and a plurality of hot plates 3 perpendicular to baffle 2, arbitrary adjacent hot plate 3 interval preset distance, and feed inlet 13 and discharge gate 14 are through the clearance intercommunication between the adjacent hot plate 3. Heating wires are arranged on the heating plate 3, and the heating plate 3 is used for heating grains.
The shell 1 is provided with an air extraction opening 15, and the air extraction opening 15 is communicated with the drying cavity 11. Specifically, one side of the shell 1, which is far away from the condensation cavity 12, is provided with a plurality of air suction holes 16, gaps between any adjacent heating plates 3 are communicated with the air suction holes 16, and the sectional area of each air suction hole 16 is smaller than the minimum sectional area of the dried grains, so that the grains are prevented from entering the air suction holes 16 to cause the blockage of the air suction holes 16. For example, if the grain to be dried is soybeans, the sectional area of the air suction hole 16 should be smaller than the minimum sectional area of the soybeans, and if the grain to be dried is rice and chestnuts, the minimum sectional area of the rice is certainly smaller than the minimum sectional area of the chestnuts, the sectional area of the air suction hole 16 should be smaller than the minimum sectional area of the rice. The negative pressure drying mechanism further comprises a cover 5, the cover 5 is fixed outside the casing 1 and covers all the air suction holes 16, and the cover 5 in the embodiment is integrally formed with the casing 1. The cover body 5 is provided with an air extraction opening 15, and the air extraction opening 15 is provided with a fifth valve. The air extraction opening 15 is used for communicating with an external air extraction device.
A plurality of steam discharge holes 21 are distributed on the partition plate 2 in an array manner, and the gaps between any two adjacent heating plates 3 are communicated with the steam discharge holes 21, so that the gaps between the heating plates 3 are communicated with the condensation cavity 12 through the steam discharge holes 21. The sectional area of the steam discharge hole 21 is smaller than the minimum sectional area of the dried grains, so that the grains are prevented from entering the steam discharge hole 21 to cause the blockage of the steam discharge hole 21. For example, if the grain to be dried is soybeans, the sectional area of the steam discharge hole 21 should be smaller than the minimum sectional area of soybeans, and if the grain to be dried is rice and chestnuts, the minimum sectional area of rice is certainly smaller than the minimum sectional area of chestnuts, the sectional area of the steam discharge hole 21 should be smaller than the minimum sectional area of rice.
A plurality of fans 4 are mounted on the partition 2 and located in the condensation chamber 12, and the plurality of fans 4 are distributed in an array on the partition 2. The fan 4 drives the air in the drying chamber 11 to move toward the condensing chamber 12.
The refrigeration duct, which is not shown, is mounted on the inner wall of the condensation chamber 12, in particular on the inner wall opposite the fan 4.
The bottom of the condensing cavity 12 in this embodiment is lower than the bottom of the drying cavity 11, a groove for containing condensed water is formed at the bottom of the condensing cavity 12, a water outlet 17 is arranged at the bottom of the condensing cavity 12, and a third valve is arranged on the water outlet 17. The third valve is opened, and the condensed water at the bottom of the condensing chamber 12 is discharged through the water outlet 17.
In the working process, the second valve and the third valve are closed, the first valve and the fifth valve are opened, grains to be dried are sent into the drying cavity 11 through the feed inlet 13, the grains to be dried are filled between the adjacent heating plates 3, and the first valve is closed after the grains are filled between the adjacent heating plates 3. An external air extracting device is connected with the air extracting opening 15, the air extracting device is started, the air extracting device extracts air in the shell 1, a negative pressure state is formed in the shell 1, and the fifth valve is closed after the preset negative pressure state is achieved. The heating wires on the heating plate 3 are electrified and the fan 4 is started, after the heating wires are electrified, the temperature of the heating plate 3 rises, the heat of the heating plate 3 is transmitted to the grain to be dried, and the temperature of the grain to be dried rises. Because the interior of the shell 1 is in a negative pressure state, the boiling point of the moisture in the grains is lower than 100 ℃, so that the moisture in the grains can be evaporated when the temperature is lower than 100 ℃, for example, when the air pressure value in the shell 1 is 0.3 atmospheric pressure, the boiling point of the water is 70 ℃, so that the moisture in the grains can be evaporated when the temperature is 70 ℃. And the heating plate 3 can dry the grains without too high temperature. Simultaneously fan 4 rotates and makes the gas in the stoving chamber 11 constantly pass through the exhaust hole 21 to the removal of condensation chamber 12 to the vapor that evaporates out in the grain is driven along with the air current through exhaust hole 21 and is sent to condensation chamber 12, and the inner wall temperature of installing the refrigeration pipe is lower, and the lower inner wall of temperature takes place the liquefaction for vapor in condensation chamber 12 meets, and the water droplet after the liquefaction finally gathers in condensation chamber 12 bottom along the inner wall landing. After drying for a period of time, the second valve is opened, the dried grains are discharged through the discharge port 14, the water discharge port 17 at the bottom of the condensation cavity 12 is opened, and the condensed water in the condensation cavity 12 is discharged through the water discharge port 17. And repeating the previous step, and drying the next batch of grains.
Further, baffle 2 in this embodiment adopts thermal insulation material to make, and baffle 2 can be fine isolated stoving chamber 11 and the heat in condensation chamber 12, prevent that the heat in stoving chamber 11 is too much to be conducted to the inner wall at refrigeration pipe place on, and then prevent that the vapor in the condensation chamber 12 can not liquefy. In this embodiment, the thermal conductivity of the partition board 2 is λ, λ < 0.05W/(m · K), for example, a vacuum insulation board may be selected, the thermal conductivity of the vacuum insulation board is 0.008W/m · K, a plate made of an aerogel thermal insulation material may be selected, the thermal conductivity of the aerogel thermal insulation material is 0.02W/m · K, a plate made of foamed polyurethane may be selected, and the thermal conductivity of the foamed polyurethane is 0.024W/m · K.
In order to further reduce the degree of heat exchange between the drying chamber 11 and the condensing chamber 12, referring to fig. 5, first and second rubber sheets 61 and 62 are respectively provided in the steam discharge holes 21. When the fan 4 is turned off, the first rubber piece 61 and the second rubber piece 62 abut against each other to close the steam discharge hole 21. When the next batch of grains is sent into the drying cavity 11, the fan 4 is turned off, and the first rubber sheet 61 and the second rubber sheet 62 block the steam exhaust hole 21, so that the heat in the drying cavity 11 is prevented from entering the condensation cavity 12. The fan 4 is started, the first rubber sheet 61 and the second rubber sheet 62 are bent under the action of the suction force of the fan, and a certain distance is formed between the first rubber sheet 61 and the second rubber sheet 62 and can be used for water vapor to pass through.
In order to increase the moisture dispersion speed, referring to fig. 4, the heating plate 3 is hollow inside to form a cavity 34, the heating plate 3 is provided with a plurality of ventilation holes 33, the ventilation holes 33 are communicated with the cavity 34, and the steam discharge holes 21 are also communicated with the cavity 34. The sectional area of the ventilation hole 33 is smaller than the minimum sectional area of the dried grain, preventing the grain from entering the cavity 34 through the ventilation hole 33. The cavity 34 is arranged in the heating plate 3, so that the gap between grains can be increased, and in the drying process, water vapor evaporated from the grains can enter the cavity 34 and then is discharged into the condensation cavity 12 through the steam discharge hole 21.
In order to detect the drying degree of the grains, the negative pressure drying device further comprises a hygrometer, a detection probe of the hygrometer is positioned in the steam exhaust hole 21, and the hygrometer is not shown in the figure. The hygrometers can be arranged in plurality, and probes of the plurality of hygrometers are respectively installed in different steam exhaust holes 21. In the course of the work, vapor passes through steam vent 21 to the hygrometer can detect humidity, along with going on of drying, the amount of the vapor of unit interval through steam vent 21 reduces gradually, thereby the humidity value that the hygrometer detected also reduces gradually, and the staff can observe the value that the hygrometer shows and judge the grain stoving condition, and then decides whether need stop drying.
In the drying process of the negative pressure drying device, the grains are not turned over between the adjacent heating plates 3, so that the speed of heat transfer of the heating plates 3 to the grains is slow, and in addition, moisture evaporated from the grains is not easy to be emitted. In order to solve this problem, referring to fig. 6, the plurality of heating plates 3 are divided into a plurality of first heating plates 31 and a plurality of second heating plates 32, the plurality of first heating plates 31 are located at an upper position in the drying chamber 11 near the side of the inlet 13, that is, the plurality of first heating plates 31 are located at an upper position in the drying chamber 11, and the plurality of second heating plates 32 are located at a lower position in the drying chamber 11 near the side of the outlet 14, that is, the plurality of second heating plates 32 are located at a lower position in the drying. A plurality of first hot plates 31 and a plurality of second hot plates 32 are parallel to each other, and a plurality of first hot plates 31 and a plurality of second hot plates 32 do not have the part of overlapping, and arbitrary first hot plate 31 is located between adjacent second hot plates 32 to the projection of discharge gate 14, is equipped with the fourth valve between a plurality of first hot plates 31 and a plurality of second hot plates 32, and the fourth valve is not shown in the drawing.
In the working process, the second valve, the third valve and the fourth valve are closed, the first valve and the fifth valve are opened, grains to be dried are sent into the drying cavity 11 through the feed inlet 13, the grains to be dried are filled between the adjacent first heating plates 31, and the first valve is closed after the grains are filled between the adjacent heating plates 3. An external air extracting device is connected with the air extracting opening 15, the air extracting device is started, the air extracting device extracts air in the shell 1, a negative pressure state is formed in the shell 1, and the fifth valve is closed after the preset negative pressure state is achieved. The heating wires on the first heating plate 31 are electrified, the fan 4 is started, after the heating wires are electrified, the temperature of the heating plate 3 rises, the heat of the heating plate 3 is transmitted to the grain to be dried, the temperature of the grain to be dried rises, and the moisture in the grain begins to evaporate and enters the condensation cavity 12. After drying for a period of time, the hygrometer detects that the humidity value has not reached the predetermined value yet, open the fourth valve, grain that has not dried gets into between the adjacent second hot plate 32, the projection of arbitrary first hot plate 31 to discharge gate 14 is located between the adjacent second hot plate 32, grain falls to between the second hot plate 32 from between the first hot plate 31, the position of grain is rearranged, for example, in the grain between the adjacent first hot plate 31, after the grain that is located inside and does not contact with first hot plate 31 falls to between the adjacent second hot plate 32, can contact with second hot plate 32, after the grain that is located outside and contact with first hot plate 31 falls to between the adjacent second hot plate 32, do not contact with second hot plate 32, thereby realize the interchange of grain position, the drying efficiency of grain has been improved. After drying for a period of time, the second valve is opened, the dried grains are discharged through the discharge port 14, the water discharge port 17 at the bottom of the condensation cavity 12 is opened, and the condensed water in the condensation cavity 12 is discharged through the water discharge port 17. And repeating the previous step, and drying the next batch of grains.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. A negative pressure drying device is characterized by comprising a shell (1), a partition plate (2), a plurality of heating plates (3), a fan (4) and a refrigerating pipe;
the partition plate (2) is arranged in the shell (1) to divide the interior of the shell (1) into a drying cavity (11) and a condensing cavity (12);
a feeding hole (13) is formed in the top of the drying cavity (11), a first valve is arranged on the feeding hole (13), a discharging hole (14) is formed in the bottom of the drying cavity (11), and a second valve is arranged on the discharging hole (14);
the shell (1) is provided with an air extraction opening (15), and the air extraction opening (15) is communicated with the drying cavity (11);
the heating plates (3) are arranged in the drying cavity (11), any adjacent heating plates (3) are separated by a preset distance, and the feeding hole (13) and the discharging hole (14) are communicated through gaps among the adjacent heating plates (3);
the partition plate (2) is provided with a plurality of steam discharge holes (21), and the condensation cavity (12) is communicated with the gap through the plurality of steam discharge holes (21);
the fan (4) is arranged on the partition plate (2) and is positioned in the condensation cavity (12);
the refrigerating pipe is arranged on the inner wall of the condensing cavity (12);
the bottom of the condensation cavity (12) is provided with a water outlet (17), and the water outlet (17) is provided with a third valve.
2. Negative pressure drying arrangement according to claim 1, characterized in that the refrigerant pipe is mounted on the inner wall opposite to the fan (4).
3. The negative-pressure drying apparatus as claimed in claim 1, wherein the thermal conductivity of the partition (2) is λ, λ < 0.05W/(m-K).
4. The negative pressure drying device according to claim 1, wherein a first rubber sheet (61) and a second rubber sheet (62) are respectively arranged in the plurality of steam exhaust holes (21), and the first rubber sheet (61) and the second rubber sheet (62) abut against and block the steam exhaust holes (21).
5. The negative pressure drying device according to claim 1, characterized in that the negative pressure drying device further comprises a hygrometer, the detection probe of which is located in the steam exhaust hole (21).
6. The negative pressure drying apparatus according to claim 1, wherein the heating plate (3) is hollow inside to form a chamber (34), and the heating plate (3) is provided with a plurality of ventilation holes (33), and the ventilation holes (33) are communicated with the chamber (34).
7. Negative pressure drying arrangement according to claim 6, characterized in that the chamber (34) communicates with the condensation chamber (12) through a steam exhaust (21).
8. Negative pressure drying device according to any of claims 1-7, characterized in that the number of heating plates (3) is divided into a number of first heating plates (31) and a number of second heating plates (32), the number of first heating plates (31) being located near the side of the inlet opening (13), the number of second heating plates (32) being located near the side of the outlet opening (14), and a fourth valve being arranged between the number of first heating plates (31) and the number of second heating plates (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011220422.1A CN112503869A (en) | 2020-11-05 | 2020-11-05 | Negative pressure drying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011220422.1A CN112503869A (en) | 2020-11-05 | 2020-11-05 | Negative pressure drying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112503869A true CN112503869A (en) | 2021-03-16 |
Family
ID=74955866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011220422.1A Pending CN112503869A (en) | 2020-11-05 | 2020-11-05 | Negative pressure drying device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112503869A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114152071A (en) * | 2021-11-30 | 2022-03-08 | 长春医学高等专科学校 | Drying equipment for food dehydration process |
| CN115107129A (en) * | 2022-08-30 | 2022-09-27 | 南通柏科家居有限公司 | Furniture board processingequipment |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6027336A (en) * | 1983-07-22 | 1985-02-12 | ガストン・フアニユア−ル | Slow dehydrating and storing method and equipment of grains |
| CN2563537Y (en) * | 2002-08-13 | 2003-07-30 | 齐志权 | Crop dewatering device |
| CN104585850A (en) * | 2015-02-12 | 2015-05-06 | 蒙城县云超日用品有限公司 | Full-automatic numerical control dehydration processing system |
| CN204987671U (en) * | 2015-07-08 | 2016-01-20 | 河南金明自动化设备有限公司 | Heat pump type low -temperature vacuum drying device |
| CN105875827A (en) * | 2016-04-28 | 2016-08-24 | 安徽谷丰机械科技有限公司 | Drying box for grain drying machine |
| CN106123548A (en) * | 2016-07-05 | 2016-11-16 | 江西省农业科学院农产品加工研究所 | A kind of corn negative pressure continuous drier of built-in heater |
| CN205878847U (en) * | 2016-07-05 | 2017-01-11 | 江西省农业科学院农产品加工研究所 | Cereal negative pressure continuous dryer's built -in heating device |
| CN109042869A (en) * | 2018-07-03 | 2018-12-21 | 安徽辰宇机械科技有限公司 | A kind of cereal hot wind cyclic drying system |
| CN110118483A (en) * | 2019-04-02 | 2019-08-13 | 天津大学 | The drying means and device of material |
| CN211120284U (en) * | 2019-11-05 | 2020-07-28 | 江西海盛仁粮油有限公司 | Organic rice low temperature vacuum drying machine |
-
2020
- 2020-11-05 CN CN202011220422.1A patent/CN112503869A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6027336A (en) * | 1983-07-22 | 1985-02-12 | ガストン・フアニユア−ル | Slow dehydrating and storing method and equipment of grains |
| CN2563537Y (en) * | 2002-08-13 | 2003-07-30 | 齐志权 | Crop dewatering device |
| CN104585850A (en) * | 2015-02-12 | 2015-05-06 | 蒙城县云超日用品有限公司 | Full-automatic numerical control dehydration processing system |
| CN204987671U (en) * | 2015-07-08 | 2016-01-20 | 河南金明自动化设备有限公司 | Heat pump type low -temperature vacuum drying device |
| CN105875827A (en) * | 2016-04-28 | 2016-08-24 | 安徽谷丰机械科技有限公司 | Drying box for grain drying machine |
| CN106123548A (en) * | 2016-07-05 | 2016-11-16 | 江西省农业科学院农产品加工研究所 | A kind of corn negative pressure continuous drier of built-in heater |
| CN205878847U (en) * | 2016-07-05 | 2017-01-11 | 江西省农业科学院农产品加工研究所 | Cereal negative pressure continuous dryer's built -in heating device |
| CN109042869A (en) * | 2018-07-03 | 2018-12-21 | 安徽辰宇机械科技有限公司 | A kind of cereal hot wind cyclic drying system |
| CN110118483A (en) * | 2019-04-02 | 2019-08-13 | 天津大学 | The drying means and device of material |
| CN211120284U (en) * | 2019-11-05 | 2020-07-28 | 江西海盛仁粮油有限公司 | Organic rice low temperature vacuum drying machine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114152071A (en) * | 2021-11-30 | 2022-03-08 | 长春医学高等专科学校 | Drying equipment for food dehydration process |
| CN115107129A (en) * | 2022-08-30 | 2022-09-27 | 南通柏科家居有限公司 | Furniture board processingequipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112503869A (en) | Negative pressure drying device | |
| CN206595551U (en) | A kind of semiconductor dehumidifying device | |
| CN201555424U (en) | Heat pump circulatory dehumidification barn | |
| CN102288016A (en) | Energy-saving and environment-friendly drying box | |
| CN111029949A (en) | Transformer case with dehumidification cooling function | |
| CN207610489U (en) | A kind of tea drier | |
| CN107462048B (en) | Heat pump belt type drying equipment based on zone control and drying method thereof | |
| WO2019141187A1 (en) | Drying device for dishwasher and dishwasher | |
| CN105783472A (en) | Heat pump-type vermicelli drying equipment | |
| CN101625143A (en) | Multi-functional ventilation fan | |
| CN204841367U (en) | Pneumatics refrigeration dryer | |
| CN107478039B (en) | Heat pump belt type drying system based on zone control and drying method thereof | |
| CN208553459U (en) | A kind of pocket type pulsed dust collector that can be cooling | |
| CN205002472U (en) | Air -cooled freezer | |
| CN105318509B (en) | The control system and control method of cabinet air conditioner | |
| CN211233676U (en) | Household drying dehumidifier air duct system | |
| CN209655466U (en) | A kind of sealed dehumidifier | |
| CN208127720U (en) | A kind of cool-down dehumidification device for switchgear | |
| CN212875140U (en) | Novel dehumidification switch cabinet | |
| CN217504180U (en) | Heat pump drying equipment and heat pump curing barn | |
| CN206947801U (en) | A kind of dehumidifing ＆ Cooling apparatus of switch cubicle | |
| CN220489796U (en) | Starch evacuation tail gas waste heat utilization device | |
| CN217504179U (en) | Heat pump drying equipment and heat pump curing barn | |
| CN218999481U (en) | Dried fruit machine | |
| JP2939255B1 (en) | Grain refrigeration equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210316 |
|
| RJ01 | Rejection of invention patent application after publication |