CN103392796B - Cereal drying process - Google Patents

Cereal drying process Download PDF

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Publication number
CN103392796B
CN103392796B CN201310321225.2A CN201310321225A CN103392796B CN 103392796 B CN103392796 B CN 103392796B CN 201310321225 A CN201310321225 A CN 201310321225A CN 103392796 B CN103392796 B CN 103392796B
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China
Prior art keywords
cereal
drying
accommodation
air
gas
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CN201310321225.2A
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CN103392796A (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 cereal drying process. According to the invention, a heat pump is used for drying cereal, no pollution is generated, no combustion emission is discharged, no harm is caused to the human body, good social benefits are generated, the energy-saving effect is outstanding, the period of investment return is short, the energy efficiency ratio of cereal drying process during cereal harvesting season is within 3-5, namely, after 1kw of electricity is input, and 3-5kw of heat can be generated, compared with the process of directly combusting energy or crops, the using cost is greatly saved.

Description

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, the environmental pollution of drying the existence of cereal technique in solution prior art is serious, and the drawback that use cost is high, can be efficiently to cereal heating, drying.
The present invention is achieved through the following technical solutions: grain-drying technique, comprises 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 compressor of heat pump drying unit is compressed into the cold-producing medium Working medium gas of low-temp low-pressure the gas of HTHP; Thereby the gas of HTHP enters and is cooled into liquid after condenser and emits amount of heat; Condensed liquid passes through heating power expansion valve throttling again, and the liquid that cold-producing medium becomes low-temp low-pressure enters evaporimeter, and refrigerant gas flashes to the gas of normal temperature low pressure, returns compressor; Surrounding air is heated and is then passed into drying tower by pipeline in condenser; 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.
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 process flow diagram of the present invention.
Fig. 2 is the structural representation of heat pump drying unit and drying tower in 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, grain-drying technique, comprises 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 compressor of heat pump drying unit is compressed into the cold-producing medium Working medium gas of low-temp low-pressure the gas of HTHP; Thereby the gas of HTHP enters and is cooled into liquid after condenser and emits amount of heat; Condensed liquid passes through heating power expansion valve throttling again, and the liquid that cold-producing medium becomes low-temp low-pressure enters evaporimeter, and refrigerant gas flashes to the gas of normal temperature low pressure, returns compressor; Surrounding air is heated and is then passed into drying tower by pipeline in condenser;
In described drying tower, have the device that detects described cereal humidity, 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.
Referring to Fig. 2 to Fig. 4, described heat pump drying unit comprises air inlet 10, described heat pump drying unit 1 comprises at least one refrigerant circulation loop, described refrigerant circulation loop comprises compressor 11, cross valve 12, condenser 13, device for drying and filtering 14, heating power expansion valve 15, evaporimeter 16, described compressor 11, cross valve 12, condenser 13, device for drying and filtering 14, heating power expansion valve 15, evaporimeter 16 is connected to form closed circuit successively, described heat pump drying unit 1 also comprises air circulation duct, described air circulation duct comprises the pipeline being communicated with described air inlet 10, described device for cleaning pipeline is crossed the condenser 13 of each refrigerant circulation loop and is communicated with described drying tower 2.
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.
Described condenser 13 and evaporimeter 16 are respectively finned cooler and 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, enter again device for drying and filtering 14, heating power expansion valve, finally evaporation in evaporimeter 16, heat in absorbing environmental, finally enter compressor by cross valve, so iterative cycles, cold-producing medium working medium absorbs the heat of air in evaporimeter, 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 dryer by the first blower fan from dryer air inlet, first be heated into the hot-air of uniform temperature by the condenser in one of them refrigerant circulation loop, hot-air now makes atmosphere temperature rising become the heated drying air of 55 DEG C of left and right through the condenser in another refrigerant circulation loop again.Enter drying tower from drying tower air inlet cereal is dried, finally, by drying tower exhaust outlet, the moisture content in cereal is taken away.

Claims (2)

1. 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 (40) just falls into another accommodation section (40) from the through hole (43) of middle baffle plate (42) therein, cereal is heated more even, 2) start the heat pump drying unit being connected with described drying tower, the compressor of heat pump drying unit is compressed into the cold-producing medium Working medium gas of low-temp low-pressure the gas of HTHP, thereby the gas of HTHP enters and is cooled into liquid after condenser and emits amount of heat, condensed liquid passes through heating power expansion valve throttling again, and the liquid that cold-producing medium becomes low-temp low-pressure enters evaporimeter, and refrigerant gas flashes to the gas of normal temperature low pressure, returns compressor, surrounding air is heated and is then passed into drying tower by pipeline in condenser, 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. 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.
CN201310321225.2A 2013-07-29 2013-07-29 Cereal drying process Active CN103392796B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Publication number Priority date Publication date Assignee Title
CN105546966B (en) * 2015-12-31 2018-03-23 中国科学院理化技术研究所 A kind of dry fruit continous way heat pump drying system
CN108489221A (en) * 2018-03-20 2018-09-04 湖南农业大学 A kind of cereal dries drying system and its furnace drying method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101769675A (en) * 2009-01-07 2010-07-07 广东省农业机械研究所 Paddy dryer with heat return type heat pump
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

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