CN103431041B - Grain drying technology - Google Patents

Grain drying technology Download PDF

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Publication number
CN103431041B
CN103431041B CN201310321616.4A CN201310321616A CN103431041B CN 103431041 B CN103431041 B CN 103431041B CN 201310321616 A CN201310321616 A CN 201310321616A CN 103431041 B CN103431041 B CN 103431041B
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China
Prior art keywords
cereal
air
accommodation
drying
condenser
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CN201310321616.4A
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CN103431041A (en
Inventor
祝富华
郁志扬
邹为奇
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SKYSEA REFRIGERATION & ELECTRICAL EQUIPMENT Co Ltd
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SKYSEA REFRIGERATION & ELECTRICAL EQUIPMENT Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/90Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in food processing or handling, e.g. food conservation
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P60/00Technologies relating to agriculture, livestock or agroalimentary industries
    • Y02P60/80Food processing, e.g. use of renewable energies or variable speed drives in handling, conveying or stacking
    • Y02P60/85Food storage or conservation, e.g. cooling or drying

Abstract

The invention discloses a grain drying technology. According to the grain drying technology, grain is dehumidified by a heat pump, and then dried, so that the grain drying technology has no pollution or combustion discharge, cannot injury a human body and has good social benefits.

Description

A kind of grain-drying technique
Technical field
The present invention relates to a kind of grain-drying technique.
Background technology
At present, the dryer that China and even the whole world mainly adopt mainly contains the method for " fuel oil-air-supply " " burn wood-air-supply " or other directly the burn energy or crops.
The unit of " fuel oil-air-supply " and " burn wood-air-supply " is all fuel type, can increase flue dust, CO, CO 2deng the discharge of pollutant, this is worthless in increasingly important situation of environmental requirement under the condition of current China atmospheric environment severe exacerbation." fuel oil-air-supply " technique is mainly done fuel with diesel oil, can strive fuel oil with other industry, not only can increase the weight of the pollution of environment yet more can increase the weight of national energy supply pressure." burn wood-air-supply " technique is mainly done fuel with stalk, bavin, rice chaff etc., and these fuel are more serious to the pollution of environment." fuel oil-air-supply " and " burn wood-air-supply " unit is all mineral and biological as fuel, and the costliness of use cost certainly will increase the burden of the vast farmers of China.Moreover the imperfect combustion of fuel must cause again the loss of air-polluting aggravation and the energy.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of grain-drying technique, solve the environmental pollution existing in prior art serious, the drawback that use cost is high, can be efficiently to cereal heating, drying.
The present invention is achieved through the following technical solutions: a kind of grain-drying technique, is characterized in that: comprise the steps: 1) after being packed into go-cart, cereal sends into drying tower, 2) start the heat pump drying unit being connected with described drying tower, the refrigerant gas of HTHP is entered condenser by the compressor of heat pump drying unit, pass through again heating power expansion valve throttling, the liquid that cold-producing medium becomes low-temp low-pressure enters dehumidification heat exchange, refrigerant gas flashes to the gas of normal temperature low pressure, return compressor, surrounding air is introduced air circulation duct by blower fan, first pass through dehumidification heat exchange, water content in extracting air, dry cold air is being heated into the air of normal temperature through fin condenser, to reach the object of the relative humidity that reduces air, the air of dry normal temperature becoming to pass in described drying tower after another condenser heating, 3) hot-air is dried the cereal in described go-cart, has the device that detects described cereal humidity in described drying tower, and in the time detecting that the humidity of cereal reaches settings, described compressor cuts out, thereby takes out described cereal.
In technique scheme, pass into the air themperature of described drying tower between 50 DEG C-60 DEG C.
In technique scheme, in described go-cart, be rotationally connected cereal container by rotating shaft, described cereal container comprises two flaring accommodation sections, between described accommodation section, be fixedly connected with by baffle plate, the through hole passing through for cereal is set in baffle plate, be provided with openable cover plate on the top of at least one accommodation section, when cereal loads, first open the opening of accommodation section, then after pouring cereal into, close cover plate, rotating shaft drives by a drive unit, on drive unit, be provided with controller, controller makes the every mistake of rotating shaft to 3 minutes, rotate 180 degree in 1 minute, now the cereal in an accommodation section just falls into another accommodation section from the through hole of middle baffle plate therein, cereal is heated more even.
In technique scheme, when envionmental humidity is lower than 60% time, close dehumidification heat exchange, open evaporimeter; Surrounding air in step 2 is directly heated by condenser.
1, the present invention has following beneficial effect: environmental protection is good: in the present invention, without any pollution, arrange thing outward without any burning, can not cause damage to human body, have good social benefit.
2, energy consumption is low: energy-saving effect is outstanding, the investment repayment phase is short, and this product Energy Efficiency Ratio inputs the electricity of 1kw between grain harvest general 3-5 in season, can produce the heat of 3-5kw, compared with the direct burning energy or crops, in use cost, will save a lot.
3, security performance is good, without any hidden danger: different from other kind grain drying machines, the present invention adopts air-condition principle to heat cereal, does not catch fire, the potential safety hazard such as leakage of oil.
Brief description of the drawings
Fig. 1 is schematic flow sheet of the present invention.
Fig. 2 is structural representation of the present invention.
Fig. 3 is the principle schematic of refrigerant circulation loop of the present invention.
Fig. 4 is the structural representation of source pump of the present invention.
Fig. 5 is the structural representation of go-cart in the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing and detailed description of the invention, the present invention is described in further detail: referring to Fig. 1, a kind of grain-drying technique, is characterized in that: comprise the steps: 1) after being packed into go-cart, cereal sends into drying tower, 2) start the heat pump drying unit being connected with described drying tower, the refrigerant gas of HTHP is entered condenser by the compressor of heat pump drying unit, pass through again heating power expansion valve throttling, the liquid that cold-producing medium becomes low-temp low-pressure enters dehumidification heat exchange, refrigerant gas flashes to the gas of normal temperature low pressure, return compressor, surrounding air is introduced air circulation duct by blower fan, first pass through dehumidification heat exchange, water content in extracting air, dry cold air is being heated into the air of normal temperature through fin condenser, to reach the object of the relative humidity that reduces air, the air of dry normal temperature becoming to pass in described drying tower after another condenser heating, 3) hot-air is dried the cereal in described go-cart, has the device that detects described cereal humidity in described drying tower, and in the time detecting that the humidity of cereal reaches settings, described compressor cuts out, thereby takes out described cereal.
Pass into the air themperature of described drying tower between 50 DEG C-60 DEG C, this temperature can obtain good grain-drying effect in obtaining larger Energy Efficiency Ratio.
In described go-cart 3, be rotationally connected cereal container by rotating shaft (accompanying drawing does not show), described cereal container comprises two flaring accommodation sections 40, 40 of described accommodation sections are fixedly connected with by baffle plate 42, the through hole 43 passing through for cereal is set in baffle plate 42, be provided with openable cover plate 41 on the top of at least one accommodation section 40, when cereal loads, first open the cover plate 41 of accommodation section 40, then after pouring cereal into, close cover plate 41, rotating shaft drives by a drive unit, on drive unit, be provided with controller, controller makes the every mistake of rotating shaft to 3 minutes, rotate 180 degree in 1 minute, now the cereal in an accommodation section 40 just falls into another accommodation section 40 from the through hole 43 of middle baffle plate 42 therein, cereal is heated more even.The outer wall of described container is netted, is convenient to effectively contact with the hot-air in environment, is convenient to the conduction of heat.
When envionmental humidity (generally now not needing to dehumidify) lower than 60% time, therefore close dehumidification heat exchange, open evaporimeter; Surrounding air in step 2 is not dehumidified by dehumidification heat exchange, and now surrounding air is passed in drying tower after being directly heated by condenser.
Referring to Fig. 2 to Fig. 5, described heat pump drying unit comprises air inlet 10, described heat pump drying unit 1 comprises air dewetting loop, described air dewetting loop comprises connected successively compressor 11, cross valve 12, condenser 13, device for drying and filtering 14, the first heating power expansion valve 15, dehumidification heat exchange 16, and described dehumidification heat exchange 16 connects described cross valve 12, described heat pump drying unit 1 also comprises air circulation duct and at least one refrigerant circulation loop, described refrigerant circulation loop comprises compressor 11, cross valve 12, condenser 13, device for drying and filtering 14, the second heating power expansion valve 150, evaporimeter 160, described compressor 11, cross valve 12, condenser 13, device for drying and filtering 14, the second heating power expansion valve 150, evaporimeter 160 is connected to form closed circuit successively, described air circulation duct comprises the pipeline being communicated with described air inlet 10, and described pipeline is successively by being communicated with described drying tower 2 after described dehumidification heat exchange 16 and condenser 13.
Be provided with roller 17 in described heat pump drying unit 1 bottom, unit can be moved freely.
Be positioned at described air inlet 10 places at described heat pump drying unit 1 and be provided with the first blower fan (accompanying drawing does not show), utilize described the first blower fan better surrounding air to be imported to heat exchange in dryer.
Be provided with air-ducting ring 18 and the second blower fan (accompanying drawing does not show) at described heat pump drying unit 1 top, in refrigerant circulation loop, cold, by the second blower fan, is discharged to air and goes from air-ducting ring.
In described drying tower 2, be provided with humidity detector, in the time that described cereal humidity is reduced to setting value, described humidity detector transmits described compressor is quit work.
Described condenser 13 is finned cooler, and described evaporimeter 160 is finned evaporator.
Described refrigerant circulation loop has two.
Cold-producing medium working medium, under the piston action of compressor, becomes low-temp low-pressure gas compression the gas of HTHP; Thereby the gas of HTHP enters and is cooled into liquid after condenser and emits amount of heat; Thereby the cold air in air circulation duct absorbs its heat constantly to rise and becomes high-temperature hot air; Cold-producing medium working medium is by after condenser, then enters the liquid that device for drying and filtering, heating power expansion valve, cold-producing medium become low-temp low-pressure and enter dehumidification heat exchange, and refrigerant gas flashes to the gas of normal temperature low pressure, returns compressor.Cold-producing medium working medium absorbs the heat of air in evaporimeter, and under the mechanism of compressor, the evolution of heat from condenser, changes the heat of hot blast into.Whole source pump is used contrary Carnot cycle principle, do work and make working medium produce physical phase transition (liquid state-gaseous state-liquid state) by heat pump, utilize in reciprocation cycle phase transition process uninterrupted heat absorption and put thermal property, by condenser, air circulation duct is constantly heated, make cold air be warmed up to gradually high-temperature hot air; Owing to effectively utilizing airborne heat, the meeting that the relative traditional combustion of Energy Efficiency Ratio when oven dry is dried is more than 3-5 times.
Surrounding air enters from Drying unit air inlet by the first blower fan, first pass through dehumidification heat exchange, water content in extracting air, now surrounding air becomes dry cold air from normal temperature and pressure state, dry cold air is be heated into the air of normal temperature through fin condenser, to reach the object of the relative humidity that reduces air.The air of dry normal temperature is at the condenser through refrigerant circulation loop, and the heated drying air that is heated into 55 DEG C is dried the cereal in drying tower.

Claims (3)

1. a grain-drying technique, it is characterized in that: comprise the steps: 1) after being packed into go-cart, cereal sends into drying tower, in described go-cart, be rotationally connected cereal container by rotating shaft, described cereal container has netted outer wall construction, described cereal container comprises two flaring accommodation sections, between described accommodation section, be fixedly connected with by baffle plate, the through hole passing through for cereal is set in baffle plate, be provided with openable cover plate on the top of at least one accommodation section, when cereal loads, first open the opening of accommodation section, then after pouring cereal into, close cover plate, rotating shaft drives by a drive unit, on drive unit, be provided with controller, controller makes the every mistake of rotating shaft to 3 minutes, rotate 180 degree in 1 minute, now the cereal in an accommodation section just falls into another accommodation section from the through hole of middle baffle plate therein, cereal is heated more even, 2) start the heat pump drying unit being connected with described drying tower, the refrigerant gas of HTHP is entered condenser by the compressor of heat pump drying unit, pass through again heating power expansion valve throttling, the liquid that cold-producing medium becomes low-temp low-pressure enters dehumidification heat exchange, refrigerant gas flashes to the gas of normal temperature low pressure, return compressor, surrounding air is introduced air circulation duct by blower fan, first pass through dehumidification heat exchange, water content in extracting air, dry cold air is being heated into the air of normal temperature through fin condenser, to reach the object of the relative humidity that reduces air, the air of dry normal temperature becoming to pass in described drying tower after another condenser heating, 3) hot-air is dried the cereal in described go-cart, has the device that detects described cereal humidity in described drying tower, and in the time detecting that the humidity of cereal reaches settings, described compressor cuts out, thereby takes out described cereal.
2. a kind of grain-drying technique as claimed in claim 1, is characterized in that: pass into the air themperature of described drying tower between 50 DEG C-60 DEG C.
3. a kind of grain-drying technique as above-mentioned in claim 1, is characterized in that: when envionmental humidity is lower than 60% time, close dehumidification heat exchange, open evaporimeter; Surrounding air in step 2 is directly heated by condenser.
CN201310321616.4A 2013-07-29 2013-07-29 Grain drying technology Active CN103431041B (en)

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104197649A (en) * 2014-09-12 2014-12-10 魏春旺 Heat pump and solar energy combined heat supply drying room working under two modes
CN105104522A (en) * 2015-09-09 2015-12-02 宁波天海制冷设备有限公司 Cereal drying machine
CN109776720A (en) * 2017-11-13 2019-05-21 济南华迪工贸有限公司 A kind of preparation method of the polyacrylic acid large-particle size bead-like water-absorbent resin of crosslinking

Citations (2)

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Publication number Priority date Publication date Assignee Title
CN202104170U (en) * 2011-04-26 2012-01-11 江西省科学院食品工程创新中心 Miniature efficient rice heat pump drying machine
CN202582115U (en) * 2012-05-26 2012-12-05 上虞市雄盛电器有限公司 Cold air drying device

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
CN202104170U (en) * 2011-04-26 2012-01-11 江西省科学院食品工程创新中心 Miniature efficient rice heat pump drying machine
CN202582115U (en) * 2012-05-26 2012-12-05 上虞市雄盛电器有限公司 Cold air drying device

Non-Patent Citations (2)

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Title
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黄胜春等.热泵技术的应用现状及其发展.《冶金丛刊》.2003,(第3期),第11-13页.

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