CN109618686B - Solar heat pump solution dehumidifying, composite drying and low-temperature ventilation grain storage system - Google Patents
Solar heat pump solution dehumidifying, composite drying and low-temperature ventilation grain storage system Download PDFInfo
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- CN109618686B CN109618686B CN201910096634.4A CN201910096634A CN109618686B CN 109618686 B CN109618686 B CN 109618686B CN 201910096634 A CN201910096634 A CN 201910096634A CN 109618686 B CN109618686 B CN 109618686B
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01F—PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
- A01F25/00—Storing agricultural or horticultural produce; Hanging-up harvested fruit
- A01F25/16—Arrangements in forage silos
- A01F25/22—Ventilating arrangements
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- 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
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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
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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
- F26B21/003—Supply-air or gas filters
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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
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/08—Humidity
- F26B21/086—Humidity by condensing the moisture in the drying medium, which may be recycled, e.g. using a heat pump cycle
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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
- F26B2200/06—Grains, e.g. cereals, wheat, rice, corn
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/51—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture specially adapted for storing agricultural or horticultural products
- Y02A40/58—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture specially adapted for storing agricultural or horticultural products using renewable energies
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/90—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in food processing or handling, e.g. food conservation
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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
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/80—Food processing, e.g. use of renewable energies or variable speed drives in handling, conveying or stacking
- Y02P60/85—Food storage or conservation, e.g. cooling or drying
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Chemical & Material Sciences (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Environmental Sciences (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention relates to the field of grain storage equipment, in particular to a solar heat pump solution dehumidifying, composite drying and low-temperature ventilation grain storage system. The device comprises a granary ventilation device, a solar hot water circulation device, a heat pump circulation device and a solution dehumidification circulation device, wherein the solar hot water circulation device comprises a solar heat collector, a water pump, an air-water heat exchanger and a plate heat exchanger; the heat pump circulating device comprises a compressor, an air-cooled condenser, an expansion valve and an evaporator; the solution dehumidifying and circulating device comprises a regeneration solution tank, a plate heat exchanger, a dehumidifier, a dehumidifying solution tank, a solution flow regulating valve I, a solution pump I, a regenerator and a regeneration solution tank. The system adopts a solar heat pump solution combined drying technology, not only can realize the drying of grains in a barn, but also can realize the low-temperature grain storage requirement of the barn.
Description
Technical Field
The invention relates to the field of grain storage equipment, in particular to a solar heat pump solution dehumidifying, composite drying and low-temperature ventilation grain storage system.
Background
At present, grain storage generally requires drying treatment before warehousing, and has the disadvantages of large workload, high loss and complicated procedures. Due to the influence of factors such as climate conditions, grain sources and the like, the phenomenon that high-moisture grains are directly put into a bin often occurs, proper drying treatment is needed to ensure safe storage of the grains, and the existing drying method, such as drying by a dryer, consumes a large amount of fossil energy, has high cost, and additionally, a special drying bin is needed to be arranged, and the grains are poured into a storage bin from the drying bin after drying. According to the solar energy equipment drying method, as solar energy is a clean and cheap renewable energy source, the solar energy is fully utilized to dry grains, and a large amount of conventional energy sources can be saved. However, solar energy belongs to intermittent energy sources, is greatly influenced by climate conditions, and if solar energy is used as a single heat source for drying, the drying speed and the drying yield can be influenced, and the solar energy is matched with other measures in practical application. The drying technology of solar energy and heat pump combination is a current research hot spot. The solution dehumidification is a method for dehumidifying by utilizing the liquid moisture absorption solution, the solution regeneration temperature is low, low-grade energy sources such as heat pump condensation waste heat, solar energy and the like can be utilized, the energy saving effect of the system is obvious, and the application of the solution dehumidification in grain bin drying is reported recently. The drying method that condensation dehumidification is primary dehumidification and solution dehumidification is secondary dehumidification is adopted, so that the method is stable in operation, low-temperature low-humidity environment requirements are met, condensation waste heat and solar energy of a heat pump system can be used as driving energy sources for solution dehumidification, the overall energy-saving effect of the system is remarkable, the operation cost is low, and the method has great practical significance for solving the difficult problem that high-moisture grains are dried and stored in a bin.
After the grains are dried, the grains enter a grain storage mode, and the low-temperature grain storage mode is a common ecological grain storage mode at present. The low-temperature grain storage greatly weakens the respiratory activity of the grains, can delay the aging of the grains and reduces the natural decrement loss of the grain storage. In addition, the low-temperature storage mode can effectively inhibit the occurrence and development of mould, so that pesticide residues caused by pesticide sterilization treatment with chemical agents are reduced or avoided. Compared with the traditional grain storage mode, the low-temperature grain storage mode greatly improves the quality of grain storage and ensures the food safety. The mechanical refrigeration low-temperature grain storage method is one of low-temperature grain storage technologies, and compared with the low-temperature storage technology utilizing natural cold energy, the mechanical refrigeration low-temperature grain storage method is not limited by natural temperature, so that the application range is wider.
At present, the two stages of grain drying and low-temperature storage are realized by special independent equipment,
the method requires switching of equipment in different processing stages of grains, is complex in operation and is unfavorable for realizing automatic operation in the whole grain storage process. The new grain storing technology with low cost, high efficiency, bin drying and low temperature grain storing functions is one urgent requirement for the current grain storing technology.
Disclosure of Invention
The invention provides a solar heat pump solution dehumidifying, composite drying and low-temperature ventilation grain storage system, which solves the problems of high-moisture grain warehouse drying, low-temperature grain storage and the like.
The technical scheme of the invention is realized as follows:
the solar heat pump solution dehumidifying, composite drying and low-temperature ventilation grain storage system comprises a grain bin ventilation device, a solar hot water circulation device, a heat pump circulation device and a solution dehumidifying and circulating device, wherein the solar hot water circulation device comprises a solar heat collector, a water pump, an air-water heat exchanger and a plate heat exchanger; the heat pump circulating device comprises a compressor, an air-cooled condenser, an expansion valve and an evaporator; the solution dehumidifying and circulating device comprises a regeneration solution tank, a plate heat exchanger, a dehumidifier, a dehumidifying solution tank, a solution flow regulating valve I, a solution pump I, a regenerator and a regeneration solution tank.
The water outlet of the solar heat collector is connected with the water inlet of the water pump, the water outlet of the water pump is divided into two paths, one path is connected with the air-water heat exchanger, the other path is connected with the plate heat exchanger, the air-water heat exchanger is connected with the inlet of the water flow regulating valve II, the outlet of the plate heat exchanger is connected with the inlet of the water flow regulating valve I, and the outlet of the water flow regulating valve I is connected with the outlet of the water flow regulating valve II.
The compressor is connected with the air-cooled condenser, the air-cooled condenser is connected with the inlet of the expansion valve, the outlet of the expansion valve is connected with the inlet of the evaporator, and the outlet of the evaporator is connected with the compressor.
The outlet of the regenerated solution tank is respectively connected with the plate heat exchanger and the solution flow regulating valve I, the inlet of the solution pump I is connected with the plate heat exchanger and the solution flow regulating valve I through pipelines, the solution flow regulating valve II is arranged between the regenerated solution tank and the plate heat exchanger, the outlet of the solution pump I is connected with the regenerator, and the regenerator is connected with the regenerated solution tank.
The granary ventilation device comprises an air filter, a fan II, an evaporator, a dehumidifier and an air volume regulating valve component, wherein an outlet of the air filter is connected with an inlet of the fan II, an outlet of the fan II is connected with an air inlet of the evaporator, an air outlet of the evaporator is connected with an air inlet of the dehumidifier, an air outlet of the dehumidifier is connected with an air inlet of an air-water heat exchanger, an air outlet of the air-water heat exchanger is connected with an air inlet of the granary, the air volume regulating valve component comprises an air volume regulating valve II, an air volume regulating valve III and an air volume regulating valve IV, an air outlet of the granary is respectively connected with the air volume regulating valve IV and the air volume regulating valve III, and the air volume regulating valve III and the air volume regulating valve II are connected with the air filter; all the devices are connected through pipelines.
The air conditioner is characterized in that the fan I, the air-cooled condenser and the regenerator are arranged adjacently in sequence, and an air quantity regulating valve I is arranged at an air inlet of the fan I.
In the drying stage of the barn, an open system is adopted in a granary ventilation system, an air quantity regulating valve II and an air quantity regulating valve IV are opened, and an air quantity regulating valve III is closed; in the low-temperature grain storage stage, a granary ventilation system adopts a closed air circulation system, at the moment, an air quantity regulating valve II and an air quantity regulating valve IV are closed, and an air quantity regulating valve III is opened; when the outdoor air parameters meet the low-temperature refrigeration requirement of grains in winter, an open system is adopted, an air quantity regulating valve II and an air quantity regulating valve IV are opened, an air quantity regulating valve III is closed, a fan II operates, and other equipment does not operate.
When the grain is dried in a high-temperature drying mode, the heat pump circulating device and the solution dehumidifying circulating device do not operate, and the grain bin ventilating device and the solar hot water circulating device operate; in the working process, the water flow regulating valve I is closed, and the water flow regulating valve II is opened; the air quantity regulating valve II and the air quantity regulating valve IV are opened, the air quantity regulating valve III is closed, and the fan II operates.
The invention has the beneficial effects that:
1. the system adopts a solar heat pump solution combined drying technology, outdoor air is dehumidified by an evaporator and a solution dehumidifier at two stages, then the outdoor air is heated by a solar water heating system, the obtained high-temperature low-moisture air is sent into a granary, and the granary is dried by the high-moisture grains in the granary, and because the system adopts two energy sources of condensation heat and solar energy as driving energy sources for solution regeneration, the energy saving effect of the system is remarkable.
2. Compared with a single solar energy device drying method, the system has higher drying efficiency, is not influenced by weather, and can dry grains in a bin at low temperature by the drying air obtained by two-stage dehumidification of the evaporator and the solution dehumidifier when weather is bad and solar energy is insufficient or cannot be utilized.
3. The system can realize in-situ drying without arranging a special drying bin, so that links such as warehouse pouring and the like are omitted, and in addition, the system can realize a high-temperature drying mode and a low-temperature drying mode, can meet the heating or cooling requirements of different types of grain seeds in the initial stage of drying, and ensures the drying quality.
4. The system combines the bin drying function and the low-temperature ventilation grain storage function, thereby greatly improving the utilization rate of equipment, reducing the grain storage cost and being convenient for realizing automatic control in the whole grain storage process.
5. The system adopts a solar heat pump solution combined drying technology, not only can realize the drying of grains in a barn, but also can realize the low-temperature grain storage requirement of the barn.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a solar heat pump solution combined bin drying and low-temperature grain storage composite system.
Wherein: 1 is a regenerator, 2 is a dehumidifier, 3 is a regeneration solution tank, 4 is a dehumidification solution tank, 5 and 6 are solution pumps, 7 is a plate heat exchanger, 8 is a solution flow regulating valve I, 9 is a solution flow regulating valve II, 10 is a solution flow regulating valve III, 11 is a plate heat exchanger, 12 is a water pump, 13 is a solar heat collector, 14 is a water flow regulating valve I, 16 is a water flow regulating valve II, 15 is an air-water heat exchanger, 17 is a compressor, 18 is an evaporator, 19 is an air-cooled condenser, 20 is an expansion valve, 21 is a fan I, 23 is a fan II, 22 is an air regulating valve I, 24 is an air regulating valve II, 26 is an air regulating valve III, 28 is an air regulating valve IV, 25 is an air filter, and 27 is a grain bin.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, the embodiment of the invention provides a solar heat pump solution dehumidifying, composite drying and low-temperature ventilation grain storage system, which comprises a grain bin ventilation device, a solar hot water circulation device, a heat pump circulation device and a solution dehumidifying and circulating device, wherein the solar hot water circulation device comprises a solar heat collector 13, a water pump 12, an air-water heat exchanger 15 and a plate heat exchanger 11; the heat pump cycle comprises a compressor 17, an air-cooled condenser 19, an expansion valve 20 and an evaporator 18; the solution dehumidifying and circulating device comprises a regeneration solution tank 3, a plate heat exchanger 7, a dehumidifier 2, a dehumidifying solution tank 4, a solution flow regulating valve I8, a solution pump I5, a regenerator 1 and a regeneration solution tank 3.
The water outlet of the solar heat collector 13 is connected with the water inlet of the water pump 12, the water outlet of the water pump 12 is divided into two paths, one path is connected with the air-water heat exchanger 15, the other path is connected with the plate heat exchanger 11, the air-water heat exchanger 15 is connected with the inlet of the water flow regulating valve II 16, the outlet of the plate heat exchanger 11 is connected with the inlet of the water flow regulating valve I14, and the outlet of the water flow regulating valve I14 is connected with the outlet of the water flow regulating valve II 16.
The compressor 17 is connected to an air-cooled condenser 19, the air-cooled condenser 19 is connected to an inlet of an expansion valve 20, an outlet of the expansion valve 20 is connected to an inlet of an evaporator 18, and an outlet of the evaporator 18 is connected to the compressor 17.
The outlet of the regenerated solution tank 3 is respectively connected with the plate heat exchanger 7 and the solution flow regulating valve I8, the inlet of the solution pump I5 is connected with the plate heat exchanger 7 and the solution flow regulating valve I8 in a pipeline manner, the solution flow regulating valve II 9 is arranged between the regenerated solution tank 3 and the plate heat exchanger 7, the outlet of the solution pump I5 is connected with the regenerator 1, and the regenerator 1 is connected with the regenerated solution tank 3.
The granary ventilation device comprises an air filter 25, a fan II 23, an evaporator 18, a dehumidifier 2 and an air volume regulating valve assembly, wherein an outlet of the air filter 25 is connected with an inlet of the fan II 23, an outlet of the fan II 23 is connected with an air inlet of the evaporator 18, an air outlet of the evaporator 18 is connected with an air inlet of the dehumidifier 2, an air outlet of the dehumidifier 2 is connected with an air inlet of an air-water heat exchanger 15, an air outlet of the air-water heat exchanger 15 is connected with an air inlet of a granary 27, the air volume regulating valve assembly comprises an air volume regulating valve II 24, an air volume regulating valve III 26 and an air volume regulating valve IV 28, an air outlet of the granary 27 is respectively connected with the air volume regulating valve IV 28 and the air volume regulating valve III 26, and the air volume regulating valve III 26 and the air volume regulating valve II 24 are both connected with the air filter 25; all the devices are connected through pipelines.
The air-cooled condenser 19, the fan I21 and the regenerator 1 are arranged adjacently in sequence, and an air quantity regulating valve I22 is arranged at the air inlet of the fan I21.
In the drying stage of the barn, an open system is adopted in a granary ventilation system, an air quantity regulating valve II 24 and an air quantity regulating valve IV 28 are opened, and an air quantity regulating valve III 26 is closed; in the low-temperature grain storage stage, a granary ventilation system adopts a closed air circulation system, at the moment, an air quantity regulating valve II 24 and an air quantity regulating valve IV 28 are closed, and an air quantity regulating valve III 26 is opened; when the outdoor air parameters meet the low-temperature refrigeration requirement of grains in winter, an open system is adopted, an air quantity regulating valve II 24 and an air quantity regulating valve IV 28 are opened, an air quantity regulating valve III 26 is closed, a fan II 23 is operated, and other equipment is not operated.
When the grain is dried in a high-temperature drying mode, the heat pump circulating device and the solution dehumidifying circulating device do not operate, and the grain bin ventilating device and the solar hot water circulating device operate; in the working process, the water flow regulating valve I14 is closed, and the water flow regulating valve II 16 is opened; the air quantity regulating valve II 24 and the air quantity regulating valve IV 28 are opened, the air quantity regulating valve III 26 is closed, and the fan II 23 operates.
The working principle of the invention is as follows:
in the drying process of the barn, the granary ventilation system is operated in the first mode: after the outdoor air is regulated by an air quantity regulating valve II 24, an air filter 25 is used for filtering, then the air enters an evaporator 18 to be cooled and dehumidified by heat exchange with a refrigerating medium under the action of a fan II 23, then enters a dehumidifier 2 to be subjected to heat and mass exchange with a dehumidifying solution in the evaporator, moisture in the air enters the dehumidifying solution, and the air is further dehumidified. The dehumidified low-moisture air exchanges heat with one path of high-temperature water heated by the solar heat collector 13 through the air-water heat exchanger 15, the air is heated and warmed, then is sent into the granary 27 to dry grains in the granary, the air absorbs moisture of the grains and is discharged to the outdoor atmosphere through the valve 28, and the air quantity regulating valve III 26 is in a closed state.
And an operation mode II: when the fruit weather is good and the solar energy resources are sufficient, the solar hot water circulation system can be only started to heat the air, the obtained high-temperature air is sent into the granary to carry out high-temperature drying on grains, namely, the outdoor air is filtered by the air filter 25 after being regulated by the air quantity regulating valve II 24, enters the air-water heat exchanger 15 to exchange heat with the high-temperature water heated by the solar heat collector 13 under the action of the fan II 23 after passing through the evaporator 18 and the dehumidifier 2, and is sent into the granary 27 to carry out high-temperature drying on grains after being heated and heated, and the air quantity regulating valve III 26 is in a closed state at the moment.
And an operation mode III: when the weather is bad and the solar energy is insufficient or cannot be utilized, the system performs low-temperature drying on grains in the bin through the drying air obtained by two-stage dehumidification of the evaporator and the solution dehumidifier, namely, the outdoor air is filtered by the air filter 25 after being regulated by the air quantity regulating valve II 24. Then, under the action of a fan II 23, the low-temperature drying air enters the evaporator 18 to be cooled and dehumidified, then enters the dehumidifier 2 to be further dehumidified, and the obtained low-temperature drying air enters a granary 27 to carry out granary low-temperature drying on grains after passing through the air-water heat exchanger 15, and at the moment, the air quantity regulating valve III 26 is in a closed state.
After the grain is dried in the bin, the system is switched into a low-temperature grain storage mode, namely an air quantity regulating valve II 24 and an air quantity regulating valve IV 28 are closed, return air in the bin is regulated by an air quantity regulating valve III 26, filtered by an air filter 25, enters an evaporator 18 under the action of a fan II 23, is cooled, and then enters a dehumidifier 2 for necessary dehumidification. The dehumidified low-temperature air enters the granary to absorb the residual heat and the residual humidity of grains in the granary after passing through the air-water heat exchanger 15, and then is discharged into the atmosphere outside the granary. After entering winter, when the meteorological parameters meet the requirements, the outdoor fresh air can be directly sent into a granary to realize low-temperature grain storage, namely, the air quantity regulating valve III 26 is closed, the air quantity regulating valve II 24 and the air quantity regulating valve IV 28 are opened, the outdoor air is filtered through the air quantity regulating valve II 24 and the air filter 25, and under the action of the fan II 23, the outdoor air sequentially passes through the evaporator 18, the dehumidifier 2 and the air-water heat exchanger 15 and then enters the granary 27, and the low-temperature air absorbs the residual heat and the residual moisture of the grains and is discharged outdoors through the air quantity regulating valve IV 28.
Heat pump cycle: corresponding to the granary ventilation system, the working process of the granary ventilation system in the first operation mode, the third operation mode or the low-temperature grain storage mode is as follows: after the low-pressure refrigerant gas is compressed and boosted by the compressor 17, the high-pressure refrigerant gas enters the air-cooled condenser 19 to be cooled by regenerated air and is condensed into high-pressure liquid. The high-pressure liquid is throttled by the expansion valve 20 to become low-temperature low-pressure wet vapor, and enters the evaporator 18 to exchange heat with air passing through the fan II 23, wherein the low-pressure liquid absorbs heat and gasifies, and gasified low-pressure refrigerant gas is sucked again by the compressor 17, so that a heat pump cycle is completed. And the heat pump cycle does not operate corresponding to the granary ventilation system in the second operation mode.
Solar hot water circulation: corresponding to the granary ventilation system, the working process is as follows in the first operation mode or the low-temperature grain storage mode: the hot water heated by the solar heat collector 13 is divided into two paths under the action of the water pump 12, one path exchanges heat with the solution passing through the solution pump 5 by the plate heat exchanger 11, and is cooled and then is regulated by water flow 14. The other path of hot water flows into the air-water heat exchanger 15 to exchange heat with the air flowing through the dehumidifier 2, is cooled and then is mixed with the other path of water passing through the water flow regulating valve I14 by the water flow regulating valve II 16, and then enters the solar heat collector 13 to complete a cycle. The corresponding granary ventilation system operation mode II is as follows: the water flow regulating valve I14 is closed, hot water heated by the solar heat collector 13 exchanges heat with air flowing through the dehumidifier 2 through the air-water heat exchanger 15 under the action of the water pump 12, and the cooled hot water enters the solar heat collector 13 through the water flow regulating valve II 16 to complete a cycle. And the solar hot water circulation system does not operate corresponding to the granary ventilation system in the third operation mode.
Solution dehumidification cycle: corresponding to the granary ventilation system, the working process is as follows under the first operation mode, the third operation mode or the low-temperature grain storage mode: the dilute solution discharged from the dehumidifying solution tank 4 passes through a solution flow regulating valve 10, enters a plate heat exchanger 7 to exchange heat with one path of concentrated solution passing through a solution regulating valve 9, is heated and then mixed with the other path of concentrated solution passing through a solution flow regulating valve 8, and then enters a regenerator 1 to exchange heat and exchange heat with passing regenerated air after passing through the plate heat exchanger 11 and one path of hot water passing through a water flow regulating valve I14 to heat and heat under the action of a solution pump 5, wherein part of moisture in the solution enters the air, and the solution is regenerated. The regenerated concentrated solution flows into the regenerated solution tank 3 and then is divided into two paths, one path passes through the flow regulating valve 8. The other path of the solution passes through the solution flow regulating valve 9, enters the plate heat exchanger 7, exchanges heat with the dilute solution flowing through the solution flow regulating valve 10, and then enters the dehumidifier 2 under the action of the solution pump 6, the solution absorbs the moisture in the air, the concentration of the solution is reduced to form the dilute solution, the dilute solution flows into the dehumidifying solution tank 4, and then passes through the solution flow regulating valve 10, so that one cycle is completed. The working process of regenerating air in the solution dehumidifying cycle is as follows: the outdoor air passes through an air quantity regulating valve I22, enters an air-cooled condenser 19 under the action of a fan I21, absorbs condensation heat, rises in air temperature, then enters a regenerator 1 to perform heat and mass exchange with a solution to be regenerated, absorbs water in the solution, and is discharged into the atmosphere. And the solution dehumidifying and circulating system does not operate in the second operation mode corresponding to the granary ventilating system.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (6)
1. The utility model provides a solar heat pump solution dehumidification complex is dry and low temperature ventilation stores up grain system, includes granary ventilation unit, its characterized in that: the solar water heating device comprises a solar heat collector (13), a water pump (12), an air-water heat exchanger (15) and a plate heat exchanger (11); the heat pump circulation device comprises a compressor (17), an air-cooled condenser (19), an expansion valve (20) and an evaporator (18); the solution dehumidifying and circulating device comprises a regenerated solution tank (3), a plate heat exchanger (7), a dehumidifier (2), a dehumidified solution tank (4), a solution flow regulating valve I (8), a solution pump I (5) and a regenerator (1);
the solar heat collector (13) is connected with a water inlet of the water pump (12), a water outlet of the water pump (12) is divided into two paths, one path is connected with the air-water heat exchanger (15), the other path is connected with the plate-type heat exchanger (11), the air-water heat exchanger (15) is connected with an inlet of the water flow regulating valve II (16), an outlet of the plate-type heat exchanger (11) is connected with an inlet of the water flow regulating valve I (14), and an outlet of the water flow regulating valve I (14) is connected with an outlet of the water flow regulating valve II (16);
the compressor (17) is connected with the air-cooled condenser (19), the air-cooled condenser (19) is connected with the inlet of the expansion valve (20), the outlet of the expansion valve (20) is connected with the inlet of the evaporator (18), and the outlet of the evaporator (18) is connected with the compressor (17).
2. The solar heat pump solution dehumidifying, composite drying and low-temperature ventilation grain storage system according to claim 1, wherein: the outlet of the regenerated solution tank (3) is connected with the plate heat exchanger (7) and the solution flow regulating valve I (8) respectively, the inlet of the solution pump I (5) is connected with the plate heat exchanger (7) and the solution flow regulating valve I (8) through pipelines, the solution flow regulating valve II (9) is arranged between the regenerated solution tank (3) and the plate heat exchanger (7), the outlet of the solution pump I (5) is connected with the regenerator (1), and the regenerator (1) is connected with the regenerated solution tank (3).
3. The solar heat pump solution dehumidifying, composite drying and low-temperature ventilation grain storage system according to any one of claims 1-2, wherein: the granary ventilation device comprises an air filter (25), a fan II (23), an evaporator (18), a dehumidifier (2) and an air volume regulating valve component, wherein an outlet of the air filter (25) is connected with an inlet of the fan II (23), an outlet of the fan II (23) is connected with an air inlet of the evaporator (18), an air outlet of the evaporator (18) is connected with an air inlet of the dehumidifier (2), an air outlet of the dehumidifier (2) is connected with an air inlet of an air-water heat exchanger (15), an air outlet of the air-water heat exchanger (15) is connected with an air inlet of a granary (27), the air volume regulating valve component comprises an air volume regulating valve II (24), an air volume regulating valve III (26) and an air volume regulating valve IV (28), an air outlet of the granary (27) is connected with the air volume regulating valve IV (28) and the air volume regulating valve III (26), and the air volume regulating valve III (26) are connected with the air filter (25) respectively; all the devices are connected through pipelines.
4. The solar heat pump solution dehumidifying, composite drying and low-temperature ventilation grain storage system according to claim 3, wherein: the fan I (21) and the air-cooled condenser (19) are arranged adjacent to the regenerator (1) in sequence, and an air quantity regulating valve I (22) is arranged at the air inlet of the fan I (21).
5. The solar heat pump solution dehumidifying, composite drying and low-temperature ventilation grain storage system as claimed in claim 4, wherein: in the drying stage of the barn, an open system is adopted in a granary ventilation system, an air quantity regulating valve II (24) and an air quantity regulating valve IV (28) are opened, and an air quantity regulating valve III (26) is closed; in the low-temperature grain storage stage, a granary ventilation system adopts a closed air circulation system, at the moment, an air quantity regulating valve II (24) and an air quantity regulating valve IV (28) are closed, and an air quantity regulating valve III (26) is opened; when the outdoor air parameters meet the low-temperature refrigeration requirement of grains in winter, an open system is adopted, an air quantity regulating valve II (24) and an air quantity regulating valve IV (28) are opened, an air quantity regulating valve III (26) is closed, a fan II (23) operates, and other equipment does not operate.
6. The solar heat pump solution dehumidifying, composite drying and low-temperature ventilation grain storage system as claimed in claim 5, wherein: when the grain is dried in a high-temperature drying mode, the heat pump circulating device and the solution dehumidifying circulating device do not operate, and the grain bin ventilating device and the solar hot water circulating device operate; in the working process, the water flow regulating valve I (14) is closed, and the water flow regulating valve II (16) is opened; the air quantity regulating valve II (24) and the air quantity regulating valve IV (28) are opened, the air quantity regulating valve III (26) is closed, and the fan II (23) operates.
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| CN110004050B (en) * | 2019-04-28 | 2023-05-23 | 中原工学院 | Solar heat pump composite black garlic preparation system |
| CN110388815A (en) * | 2019-08-13 | 2019-10-29 | 河南中瑞制冷科技有限公司 | The multi-air condition system and its working method dry for grain depot |
| CN115371410A (en) * | 2022-02-28 | 2022-11-22 | 沈阳澳蓝节能科技有限公司 | Drying unit based on solution dehumidification heat pump |
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