CN115493370A - Low-carbon energy-saving drying system for agricultural products - Google Patents
Low-carbon energy-saving drying system for agricultural products Download PDFInfo
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- CN115493370A CN115493370A CN202211233532.0A CN202211233532A CN115493370A CN 115493370 A CN115493370 A CN 115493370A CN 202211233532 A CN202211233532 A CN 202211233532A CN 115493370 A CN115493370 A CN 115493370A
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- 238000001035 drying Methods 0.000 title claims abstract description 142
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 37
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 238000003303 reheating Methods 0.000 claims abstract description 17
- 238000009833 condensation Methods 0.000 claims abstract description 11
- 230000005494 condensation Effects 0.000 claims abstract description 11
- 238000001704 evaporation Methods 0.000 claims abstract description 10
- 230000008020 evaporation Effects 0.000 claims abstract description 10
- 238000007791 dehumidification Methods 0.000 claims description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 238000009423 ventilation Methods 0.000 claims description 14
- 238000011084 recovery Methods 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 9
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
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- 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
- F26B9/066—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers the products to be dried being disposed on one or more containers, which may have at least partly gas-previous walls, e.g. trays or shelves in a stack
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
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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
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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
- F26B21/10—Temperature; Pressure
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a low-carbon energy-saving drying system for agricultural products, which comprises a closed drying chamber and an air interchanger, wherein the drying chamber is connected with an air interchanger of the air interchanger through an air inlet main pipe and an air return main pipe, a plurality of double-acting high-energy-efficiency dehumidifying and heating devices are arranged in the drying chamber, low-temperature high-humidity gas below materials to be dried in the drying chamber enters from a low-temperature high-humidity gas inlet, sequentially passes through a heat pipe set evaporation section, a dew point evaporator, a heat pipe set condensation section, a reheating condenser and a fan to form high-temperature low-humidity gas, and is discharged to a material area to be dried in the drying chamber from a high-temperature low-humidity gas outlet, the air interchanger enables the modulated qualified gas to enter the material area to be dried in the drying chamber through the air inlet main pipe, and the gas below the materials to be dried in the drying chamber enters the air interchanger through an air return branch pipe and the air return main pipe to be processed and then is discharged. The invention promotes the circulation of the wet air in the drying chamber, keeps the internal circulation of heat energy to the maximum extent, and meets the comprehensive requirements of ensuring the drying quality and saving energy of a drying ring.
Description
Technical Field
The invention relates to the technical field of agricultural product processing, in particular to a low-carbon and energy-saving drying system for agricultural products.
Background
The drying is a key process for realizing the value increment of the agricultural products, and the main purposes of reducing the moisture content of the agricultural products, enhancing the convenience of circulation and prolonging the shelf life are that the agricultural products are dried. The hot air drying is a key process for ensuring the drying quality of agricultural products (hereinafter referred to as materials) in an industrial process, and is a process for continuously (or stage by stage) completing dehydration in a specific temperature and humidity environment of a drying chamber by taking unsaturated air as a wet heat carrier and performing wet heat exchange between the materials and the air.
The heat and moisture exchange between the hot air and the material is accompanied with the drying process. Fresh air enters the drying chamber after being treated by filtering, heating and the like, hot air is contacted with the surface of a material flow in the circulation process in the drying chamber to transfer heat to materials, meanwhile, moisture in the materials is continuously transferred to the air, after the temperature and the humidity of the air reach the set value of the drying chamber, hot and humid air containing a high enthalpy value is discharged out of the drying chamber, and the circulation is continuously carried out until the aim of dehydrating the materials is fulfilled. Analysis shows that heating fresh air and discharging high enthalpy humid and hot air to the outside of the drying chamber are two major links of energy consumption in the drying process, and the larger the process external air quantity is, the lower the external temperature is, and the larger the energy consumption ratio of the part is. Reducing drying energy consumption and improving product quality are still two major development requirements facing the field of agricultural product drying.
With the promotion and implementation of environmental protection policies, energy sources such as natural gas, biological particles and electric power gradually replace coal to exist as common drying energy sources, heat flow working media such as hot water, steam and heat transfer oil are obtained through combustion, and then hot air required by drying is obtained through secondary heat exchange. The comprehensive cost is high, the heat utilization efficiency is low, and the main problems in the drying link are solved, so that the energy conservation and consumption reduction are urgent requirements of the industry.
Disclosure of Invention
In order to solve the problems of low heat efficiency utilization rate, great energy loss caused by heat emission and the like in the conventional material drying, the invention provides the low-carbon and energy-saving drying system for the agricultural products, which can remove moisture of the materials by using minimum electric energy, promote the circulation of wet air in a drying chamber, furthest maintain the internal circulation of heat energy and meet the comprehensive requirements of ensuring the drying quality and saving energy of a drying ring.
The adopted technical scheme is as follows:
a low-carbon energy-saving drying system for agricultural products comprises a closed drying chamber and an air exchange device, wherein the drying chamber is connected with the air exchange chamber of the air exchange device through an air inlet main pipe and an air return main pipe, a plurality of double-acting high-energy-efficiency dehumidifying and heating devices are further arranged in the drying chamber, each double-acting high-energy-efficiency dehumidifying and heating device comprises a shell, and a compressor, a heat pipe set, a dew point evaporator, a reheating condenser and a fan which are arranged in the shell, a low-temperature high-humidity gas inlet and a high-temperature low-humidity gas outlet are further formed in the shell, the heat pipe set is arranged close to the low-temperature high-humidity gas inlet, the dew point evaporator is arranged between an evaporation section and a condensation section of the heat pipe set, a water receiving disc is arranged below the dew point evaporator, and the compressor is respectively connected with the dew point evaporator and the reheating condenser through circulating pipelines; the fan is arranged close to the high-temperature low-humidity gas outlet, and the reheating condenser is arranged between the dew-point evaporator and the fan; a water receiving tray in each double-acting high-energy-efficiency dehumidification and heating device leads condensed water out of the drying chamber through a drain pipe; the air inlet main pipe enters the drying chamber to form a plurality of air outlets communicated with the drying chamber, and each air outlet is provided with a louver; one end of the return air main pipe extends into the drying chamber and is communicated with a plurality of return air branch pipes arranged in the drying chamber, each return air branch pipe is provided with a return air filter, and the air inlet main pipe and the return air main pipe are respectively provided with an air supply valve and a return air valve;
the low-temperature high-humidity gas below the material to be dried in the drying chamber enters from the low-temperature high-humidity gas inlet, sequentially passes through the heat pipe set evaporation section, the dew point evaporator, the heat pipe set condensation section, the reheating condenser and the fan to form high-temperature low-humidity gas, and is discharged to the region of the material to be dried in the drying chamber from the high-temperature low-humidity gas outlet, the air exchange chamber enables the prepared qualified gas to enter the region of the material to be dried in the drying chamber through the air inlet main pipe, and the gas below the material to be dried in the drying chamber enters the air exchange chamber through the air return branch pipe and the air return main pipe for treatment and then is discharged.
Furthermore, the drying system is also provided with a system controller, a temperature and humidity sensor II and a plurality of fans, wherein the temperature and humidity sensor II and the fans are arranged in the drying chamber, and the system controller is in control connection with the temperature and humidity sensor II, the fans and the air interchanger respectively.
Furthermore, the ventilation device comprises a fresh air filtering device, an air heating device, a steam humidifying device and an external exhaust heat recovery device which are respectively in control connection with the system controller; fresh air enters the air exchange chamber, sequentially passes through the fresh air filtering device, the air heating device and the steam humidifying device to form high-temperature low-humidity gas with set temperature and humidity, and enters a material area to be dried in the drying chamber through the air inlet main pipe; and the gas below the material to be dried in the drying chamber enters the air exchange chamber through the return air main pipe, and is discharged out of the air exchange chamber after the heat is recovered by the outer exhaust heat recovery device.
Preferably, the heat pipe set is an unpowered phase-change U-shaped dehumidification pipe set formed by a plurality of heat pipes in parallel, one side of the unpowered phase-change U-shaped dehumidification pipe set faces the low-temperature high-humidity gas inlet, and the dew-point evaporator is arranged in the middle area of the unpowered phase-change U-shaped dehumidification pipe set.
Further preferably, the low-temperature and high-humidity gas inlet is arranged in the lower area of one side of the casing, the high-temperature and low-humidity gas outlet is arranged at the top of the casing, the compressor is arranged below the water pan, the fan is arranged above the reheating condenser, and the reheating condenser is arranged above the dew-point evaporator.
Further, an air filter is arranged between the inner side of the low-temperature high-humidity gas inlet and the heat pipe set.
Furthermore, the high-temperature low-humidity gas outlet is also connected with an air supply pipe, and the opening of the air supply pipe is provided with a shutter.
Furthermore, a control unit and a temperature and humidity sensor I are further arranged in the double-acting high-energy-efficiency dehumidification and heat increase device, the temperature and humidity sensor I is arranged inside the shell and connected with the control unit and used for collecting the temperature and humidity of the gas entering the low-temperature high-humidity gas inlet and transmitting collected temperature and humidity signals to the control unit, and the control unit controls the starting and stopping of the compressor and the fan according to a set temperature and humidity threshold value.
The technical scheme of the invention has the following advantages:
A. aiming at the important problems and development requirements of the industry, the low-carbon and energy-saving drying system for agricultural products is formed by combining a double-acting high-energy-efficiency dehumidification and heat-increasing device and a drying environment temperature and humidity control technology, and the special double-acting high-energy-efficiency dehumidification and heat-increasing device is used for realizing dehumidification of humid air, two-stage heat transfer recovery and circulation of drying heat energy in a drying chamber, so that the heat efficiency is greatly improved, and the energy-saving requirement is met; the invention processes the humid air by a plurality of double-acting high-energy-efficiency dehumidification and heat-increasing devices arranged in the drying chamber, reduces the emission of external air, promotes the circulation of heat energy in the drying chamber, simultaneously supplements fresh air by the ventilation device, and accurately controls the temperature and humidity environment of the drying chamber.
B. According to the agricultural product drying system, the heat emission of the system is reduced, the heating of fresh air is reduced, the humidity of the drying room is accurately controlled through the ventilation device, meanwhile, the heat recovery is carried out on the gas emitted from the drying room, and the gas and the double-acting high-energy-efficiency dehumidification and heat increasing device are cooperatively carried out, so that the heat utilization rate of the agricultural product drying system is improved, the drying energy consumption is reduced, the internal circulation of heat energy is kept to the maximum extent, and the comprehensive requirements of ensuring the drying quality and saving energy of a drying ring are met.
C. The double-acting high-energy-efficiency dehumidification and heat increase device provided by the invention combines the compressor, the dew-point evaporator, the reheating condenser, the fan and the heat pipe set to form a double-power high-efficiency dehumidification device suitable for a low-temperature high-humidity (the temperature is 30-35 ℃ and the relative humidity is 65-90%) drying environment, the dehumidification efficiency and the heat recovery capability of a drying system are improved by utilizing the heat pipe characteristic and the heat pump cooperation mode, two-stage energy transfer is realized, the material moisture is removed by utilizing the minimum electric energy, the circulation of wet air in a drying chamber is promoted, the internal circulation of heat energy is kept to the maximum extent, and the comprehensive requirements of ensuring the drying quality and saving energy of a drying ring are met.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings which are needed to be used in the embodiments will be briefly described below, and it is apparent that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained from the drawings without inventive labor to those skilled in the art.
FIG. 1 is a schematic representation of a produce drying system provided by the present invention;
FIG. 2 is a side view of a dual-powered high energy efficiency dehumidification heat enhancement device provided by the present invention;
fig. 3 is a schematic side view of the structure shown in fig. 1.
The identification symbols provided in the figures are illustrated as follows:
1-drying Chamber
2-air interchanger
21-air exchange chamber, 22-fresh air filtering device, 23-air heating device and 24-steam humidifying device
25-outer exhaust gas heat recovery device
3-air inlet main pipe; 4-Return air main pipe
5-double-acting high-energy-efficiency dehumidification and heat-increasing device
51-a housing; 52-a compressor; 53-heat pipe set; 54-dew point evaporator; 55-reheat condenser
56-blower
57-water pan, 571-drain pipe; 58-circulation line; 59-an air filter; 510-blast pipe
511-control unit, 5111-interactive interface; 512-temperature and humidity sensor I
51 a-low temperature and high humidity gas inlet, 51 b-high temperature and low humidity gas outlet
6-air supply valve; 7-a return air valve; 8-a system controller; 9-temperature and humidity sensor II; 10-Fan
100-material to be dried.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the invention provides a low-carbon energy-saving drying system for agricultural products, which comprises a closed drying chamber 1 and an air interchanger 2, wherein the drying chamber 1 is connected with an air interchanger 21 of the air interchanger 2 through an air inlet main pipe 3 and an air return main pipe 4, a plurality of double-acting high-energy-efficiency dehumidification heat-increasing devices 5 are also arranged in the drying chamber 1, at least 2 double-acting high-energy-efficiency dehumidification heat-increasing devices are arranged and can be uniformly distributed in the drying chamber, a water receiving disc 57 in each double-acting high-energy-efficiency dehumidification heat-increasing device 5 leads condensed water out of the drying chamber 1 through a water drain pipe 571, and the condensed water can be led out respectively through a connecting pipeline; the ventilation device 2 is used for adjusting the temperature and the humidity of fresh air to meet the requirements of the fresh air entering the drying chamber for the materials to be dried 100, then the fresh air is input into the drying chamber 1 through the air inlet main pipe 3, the air inlet main pipe 3 enters the drying chamber 1 and then leads out a plurality of branch pipes, and the air outlet of each branch pipe is respectively provided with a louver; the one end of the return air main pipe 4 extends to the drying chamber 1 to communicate with a plurality of return air branch pipes (not shown in the figure) arranged in the drying chamber 1, an outlet of each return air branch pipe is provided with a return air filter (not shown in the figure), and the inlet air main pipe 3 and the return air main pipe 4 are respectively provided with an air supply valve 6 and a return air valve 7 for adjusting the air quantity, so that the heat emission in the drying chamber 1 can be controlled and reduced, and the heating of fresh air is reduced. The structure of the double-acting high-energy-efficiency dehumidification and heat increase device 5 adopted by the invention is shown in fig. 2 and fig. 3, and comprises a shell 51, and a compressor 52, a heat pipe group 53, a dew-point evaporator 54, a reheat condenser 55 and a fan 56 which are arranged in the shell 51, wherein the shell 51 is also provided with a low-temperature high-humidity gas inlet 51a and a high-temperature low-humidity gas outlet 51b, the heat pipe group 53 is arranged close to the low-temperature high-humidity gas inlet 51a, the dew-point evaporator 54 is arranged between an evaporation section and a condensation section of the heat pipe group 53, a water receiving disc 57 is arranged below the dew-point evaporator 54, and the compressor 52 is respectively connected with the dew-point evaporator 54 and the reheat condenser 55 through a circulating pipeline 58; a fan 56 is disposed near the high-temperature low-humidity gas outlet 51b, and a reheat condenser 55 is disposed between the dew-point evaporator 54 and the fan 56; the water pan 57 in each double-acting high-energy-efficiency dehumidification and heat increase device 5 leads the condensed water out of the drying chamber 1 through a drain pipe 571. The low-temperature high-humidity gas below the material 100 to be dried in the drying chamber 1 enters from a low-temperature high-humidity gas inlet 51a, sequentially passes through a heat pipe group 53 evaporation section, a dew point evaporator 54, a heat pipe group 53 condensation section, a reheating condenser 55 and a fan 56 to form high-temperature low-humidity gas, the high-temperature low-humidity gas is discharged to the material area to be dried in the drying chamber 1 from a high-temperature low-humidity gas outlet 51b, the prepared qualified gas enters the material area to be dried in the drying chamber 1 through a main air inlet pipe 3 in the air exchanging chamber 21, and the gas below the material to be dried in the drying chamber 1 enters the air exchanging chamber 21 through a branch air return pipe and a main air return pipe 4 for treatment and then is discharged.
The drying system is also provided with a system controller 8, a temperature and humidity sensor II9 and a plurality of fans 10, wherein the temperature and humidity sensor II9 and the fans 10 are arranged in the drying chamber 1, the system controller 8 is in control connection with the temperature and humidity sensor II9, the fans 10 and the air interchanger 2 respectively, and the fans 10 play a role in keeping the temperature and the humidity in the drying chamber 1 consistent. The temperature and humidity of the environment in the drying chamber 1 are collected in real time through the temperature and humidity sensor II9, and the system controller 9 can conveniently finely adjust the temperature and humidity of the environment.
Of course, the ventilation device 2 used in the present invention includes a fresh air filtering device 22, an air heating device 23, a steam humidifying device 24, and an external exhaust heat recovery device 25, which are respectively in control connection with the system controller 8. Fresh air is introduced into the ventilation chamber 21, and after sequentially passing through a fresh air filtering device 22, an air heating device 23 and a steam humidifying device 24 in the ventilation chamber, high-temperature low-humidity gas with set temperature and humidity is formed and enters a material 100 area to be dried in the drying chamber 1 through the air inlet main pipe 3; the air below the material 100 to be dried in the drying chamber 1 enters the ventilation chamber 21 through the return air main pipe 4, and is discharged out of the ventilation chamber 21 after the heat is recovered by the outer exhaust heat recovery device 25, and the obtained heat energy can heat the fresh air entering the ventilation chamber 21.
The ventilation device 2 is used for regularly replacing or proportionally replacing the gas in the drying chamber 1 through a unit to ensure the environmental sanitation in the drying chamber 1, has the functions of fresh air filtering, preheating, heating, humidifying and external exhaust heat recovery, is used for maintaining the humidity balance of a drying chamber system in the material drying process, and has the requirements of ensuring the stable temperature and humidity environment, the internal circulation of wet air, ventilation, material drying and energy conservation in the drying chamber 1, and the invention is not further described.
In the low-carbon and energy-saving agricultural product drying system shown in fig. 1, a double-acting high-energy-efficiency dehumidifying and heating device 5 is arranged in a drying chamber 1, specifically, an airflow flow diagram is shown in detail in fig. 1, and low-temperature and high-humidity air in the drying chamber 1 enters a shell 51 from a low-temperature and high-humidity air inlet 51a under the action of a fan 56. Firstly, saturated or nearly saturated wet air is formed by the high-humidity air through the evaporation section of the unpowered phase-change U-shaped dehumidification pipe group, sensible heat and latent heat are released, and heat is transferred to the condensation section of the unpowered phase-change U-shaped dehumidification pipe group through phase change of media in the unpowered phase-change U-shaped dehumidification pipe group; secondly, the precooled saturated wet air is cooled and dehydrated by a dew-point evaporator 54, the moisture content and enthalpy of the air are greatly reduced, and low-temperature (relative to the air in the drying chamber) low-humidity air is formed; thirdly, the low-temperature and low-humidity air sequentially absorbs the heat transferred from the unpowered phase-change U-shaped dehumidification tube group and the reheating condenser 55 through the unpowered phase-change U-shaped dehumidification tube group condensation section and the reheating condenser 55, so that the preheating and the secondary heating of the air are completed, and high-temperature and low-humidity dry gas is formed; finally, the high-temperature low-humidity drying gas is sent into the drying chamber 1 through the fan 56 and the high-temperature low-humidity gas outlet 51b for the drying process, so that the internal circulation of air dehydration and heat energy in the drying chamber 1 is realized. The U-shaped phase-change dehumidification pipe set precools the wet air to form saturated or nearly saturated wet air, which is the primary power of dehumidification, and the primary power is provided by the temperature difference gradient between the front and the back of the U-shaped heat pipe, so that the later dehumidification efficiency is improved; and then the dew point evaporator 54 provides cold energy for the saturated wet air to form secondary power for dehumidification, and the part maintains the precooling and condensation of the saturated wet air.
The double-acting high-energy-efficiency dehumidification and heat increase device 5 mainly comprises a heat pipe set 53, a compressor 52, a reheat condenser 55, a dew-point evaporator 54 and other units, is connected through an internal circulation pipeline 58 to form a closed space, and a refrigerant completes evaporation, compression and condensation circulation processes in turn inside the closed space, so that heat released by low-temperature high-humidity air on the outer surface of the dew-point evaporator 54 is transferred to the reheat condenser 55 side through the phase change characteristic of the refrigerant.
In the present invention, a low-temperature and high-humidity gas inlet 51a is provided in a lower region of one side of a casing 51, a high-temperature and low-humidity gas outlet 51b is provided in a top portion of the casing 51, a compressor 52 is positioned below a water receiving pan 57, a fan 56 is provided above a reheat condenser 55, and the reheat condenser 55 is provided above a dew-point evaporator 54. In order to purify the low-temperature and high-humidity gas, an air filter 59 is further provided between the inner side of the low-temperature and high-humidity gas inlet 51a and the heat pipe group 53, and the low-temperature and high-humidity gas is first filtered by the air filter 59 and then subjected to the subsequent processes.
In order to better maintain the sealing performance of the housing 51, a blower pipe 510 is further connected to the high-temperature low-humidity air outlet 51b, a louver is mounted at the nozzle of the blower pipe 510, and after the blower fan 56 is started, the dehumidified high-temperature low-humidity air enters the blower pipe 510 and pushes the louver to discharge the air into the drying chamber 1.
In addition, the double-power high-energy-efficiency dehumidification and heat increase device 5 is further provided with a control unit 511 and a temperature and humidity sensor I512, the temperature and humidity sensor I512 is arranged inside the shell 51 and connected with the control unit 511 and used for collecting the temperature and humidity of the gas entering the low-temperature high-humidity gas inlet 51a and transmitting collected temperature and humidity signals to the control unit 511, and the control unit 511 controls the start and stop of the compressor 52 and the fan 56 according to the set temperature and humidity threshold.
According to the invention, an interactive interface 5111 is further arranged on the shell 51, a temperature and humidity threshold value to be set by the double-acting high-energy-efficiency dehumidification and heat increase device 5 is input through the interactive interface 5111, and the control unit 511 controls the dehumidification equipment to start or stop by judging whether a signal acquired by the temperature and humidity sensor I512 is matched with a temperature and humidity value input by the interactive interface 5111. The start and stop of the double-power high-energy-efficiency dehumidification and heat increase device 5 can also be controlled by temperature and humidity signals set by the drying system.
The double-acting high-energy-efficiency dehumidification and heat increase device 5 has three working medium circulation processes:
the first is that: working medium in the U-shaped heat pipe circulates, and the temperature difference between the front stage and the rear stage of the heat pipe provides circulating power to realize primary energy transfer;
secondly, the following steps: the compressor drives the working medium to circulate internally, so that the processes of compression, heat release and heat absorption are completed in sequence, and secondary energy transfer is realized;
thirdly, the method comprises the following steps: the low-temperature high-humidity air in the centrifugal fan driving drying chamber passes through the wet air circulation, and the wet air sequentially completes the processes of precooling, cooling dehydration, preheating and secondary heating to obtain high-temperature low-humidity air and sends the high-temperature low-humidity air to the drying chamber for circulation so as to maintain the continuous operation of a drying system and keep drying heat energy in the drying chamber, thereby achieving the purposes of energy conservation and consumption reduction.
The three processes are performed in a synergistic manner, the low-temperature high-humidity gas completes the precooling and cooling dehydration processes, latent heat of evaporation is released, then the heat transferred by the air absorption system twice is changed into high-temperature low-humidity gas suitable for drying materials, the wet air circulates in the drying chamber, the internal circulation and transfer of heat energy are kept to the maximum extent, and the comprehensive requirements of ensuring the drying quality and saving energy are met.
Nothing disclosed in this application is applicable to the prior art.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious variations or modifications derived therefrom are intended to be within the scope of the present invention.
Claims (8)
1. The low-carbon and energy-saving drying system for the agricultural products comprises a closed drying chamber (1) and an air exchange device (2), wherein the drying chamber (1) is connected with an air exchange chamber (21) of the air exchange device (2) through an air inlet main pipe (3) and an air return main pipe (4), and is characterized in that a plurality of double-acting high-energy-efficiency dehumidifying and heating devices (5) are further arranged in the drying chamber (1), each double-acting high-energy-efficiency dehumidifying and heating device (5) comprises a shell (51), a compressor (52), a heat pipe group (53), a dew-point evaporator (54), a reheating condenser (55) and a fan (56) which are arranged in the shell (51), a low-temperature and high-humidity gas inlet (51 a) and a high-temperature and low-humidity gas outlet (51 b) are further formed in the shell (51), the heat pipe group (53) is arranged close to the low-temperature and high-humidity gas inlet (51 a), the dew-point evaporator (54) is arranged between an evaporation section and a condensation section of the heat pipe group (53), a dew-temperature and a dew-point evaporator (57) is arranged below the heat pipe (54), and the dew-point evaporator (52) is respectively connected with the compressor (55) and the reheating condenser (58); the fan (56) is arranged close to the high-temperature low-humidity gas outlet (51 b), and the reheating condenser (55) is arranged between the dew-point evaporator (54) and the fan (56); a water receiving tray (57) in each double-acting high-energy-efficiency dehumidification and heat increase device (5) leads condensed water out of the drying chamber (1) through a water discharge pipe (571); the air inlet main pipe (3) enters the drying chamber (1) to form a plurality of air outlets communicated with the drying chamber, and each air outlet is provided with a louver; one end of the return air main pipe (4) extends into the drying chamber (1) and is communicated with a plurality of return air branch pipes arranged in the drying chamber (1), each return air branch pipe is provided with a return air filter, and the air inlet main pipe (3) and the return air main pipe (4) are respectively provided with an air supply valve (6) and a return air valve (7);
the low-temperature high-humidity gas below the material to be dried in the drying chamber enters from the low-temperature high-humidity gas inlet (51 a), sequentially passes through the evaporation section of the heat pipe set (53), the dew point evaporator (54), the condensation section of the heat pipe set (53), the reheating condenser (55) and the fan (56) to form high-temperature low-humidity gas, the high-temperature low-humidity gas is discharged to the material area to be dried in the drying chamber (1) from the high-temperature low-humidity gas outlet (51 b), the prepared qualified gas enters the material area to be dried in the drying chamber (1) through the air inlet main pipe (3) in the air exchange chamber (21), and the gas below the material to be dried in the drying chamber (1) enters the air exchange chamber (21) through the air return branch pipe and the air return main pipe (4) for treatment and then is discharged.
2. The low-carbon and energy-saving agricultural product drying system of claim 1, further comprising a system controller (8), a temperature and humidity sensor II (9) and a plurality of fans (10) arranged in the drying chamber (1), wherein the system controller (8) is in control connection with the temperature and humidity sensor II (9), the fans (10) and the ventilation device (2) respectively.
3. The low-carbon and energy-saving agricultural product drying system of claim 2, wherein the ventilation device (2) comprises a fresh air filtering device (22), an air heating device (23), a steam humidifying device (24) and an external exhaust heat recovery device (25), which are respectively in control connection with the system controller (8); fresh air enters the air exchange chamber (21), sequentially passes through the fresh air filtering device (22), the air heating device (23) and the steam humidifying device (24) to form high-temperature low-humidity gas with set temperature and humidity, and enters a material area to be dried in the drying chamber (1) through the air inlet main pipe (3); and the gas below the material to be dried in the drying chamber (1) enters the air exchange chamber (21) through the return air main pipe (4), and is discharged out of the air exchange chamber (21) after the heat is recovered by the outer exhaust heat recovery device (25).
4. The low-carbon and energy-saving agricultural product drying system for the agricultural products as claimed in any one of claims 1 to 3, wherein the heat pipe set (53) is a powerless phase-change U-shaped dehumidification pipe set formed by a plurality of heat pipes side by side, one side of the powerless phase-change U-shaped dehumidification pipe set is arranged to face the low-temperature and high-humidity gas inlet (51 a), and the dew-point evaporator (54) is arranged in the middle area of the powerless phase-change U-shaped dehumidification pipe set.
5. The low-carbon and energy-saving agricultural product drying system of claim 4, wherein the low-temperature and high-humidity gas inlet (51 a) is arranged at one side lower region of the shell (51), the high-temperature and low-humidity gas outlet (51 b) is arranged at the top of the shell (51), the compressor (52) is positioned below the water pan (57), the fan (56) is arranged above the reheating condenser (55), and the reheating condenser (55) is arranged above the dew-point evaporator (54).
6. A low-carbon and energy-saving agricultural product drying system according to claim 5, wherein an air filter (59) is further arranged between the inner side of the low-temperature and high-humidity gas inlet (51 a) and the heat pipe set (53).
7. The low-carbon and energy-saving drying system for agricultural products, according to claim 6, characterized in that a blast pipe (510) is further connected to the high-temperature and low-humidity gas outlet (51 b), and a louver is installed at the pipe orifice of the blast pipe (510).
8. The low-carbon energy-saving agricultural product drying system of claim 7, wherein a control unit (511) and a temperature and humidity sensor I (512) are further arranged in the double-power high-energy-efficiency dehumidification and heat increase device (5), the temperature and humidity sensor I (512) is arranged inside the shell (51) and connected with the control unit (511) and used for collecting the temperature and humidity of gas entering the low-temperature high-humidity gas inlet (51 a) and transmitting collected temperature and humidity signals to the control unit (511), and the control unit (511) controls the start and stop of the compressor (52) and the fan (56) according to a set temperature and humidity threshold value.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211212604 | 2022-09-29 | ||
| CN2022112126043 | 2022-09-29 |
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| CN115493370A true CN115493370A (en) | 2022-12-20 |
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| CN202211233532.0A Pending CN115493370A (en) | 2022-09-29 | 2022-10-10 | Low-carbon energy-saving drying system for agricultural products |
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| CN216204004U (en) * | 2021-07-21 | 2022-04-05 | 北京信和洁能新能源技术服务有限公司 | Fresh air treatment equipment integrating ion waterfall air purification |
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| CN202066136U (en) * | 2010-12-31 | 2011-12-07 | 张永旺 | JNK type heat pipe heat recovery air-conditioning unit |
| CN202719696U (en) * | 2012-06-08 | 2013-02-06 | 吕智 | Dehumidification and regeneration type air treating machine set with rotating wheel driven by heat pump |
| CN103123215A (en) * | 2013-03-11 | 2013-05-29 | 孙应真 | Intelligent hot-air drying control device |
| CN205002539U (en) * | 2015-10-08 | 2016-01-27 | 上海新浩佳新节能科技有限公司 | Take waste heat recovery formula drying unit of tuber pipe |
| US20210348843A1 (en) * | 2019-04-11 | 2021-11-11 | Shenzhen Uvled Optical Technology Co., Ltd. | Intelligent drying method and ultraviolet sterilization container |
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