CN103392796A - Cereal drying process - Google Patents

Cereal drying process Download PDF

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Publication number
CN103392796A
CN103392796A CN2013103212252A CN201310321225A CN103392796A CN 103392796 A CN103392796 A CN 103392796A CN 2013103212252 A CN2013103212252 A CN 2013103212252A CN 201310321225 A CN201310321225 A CN 201310321225A CN 103392796 A CN103392796 A CN 103392796A
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CN
China
Prior art keywords
cereal
drying
accommodation
gas
air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN2013103212252A
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Chinese (zh)
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CN103392796B (en
Inventor
祝富华
郁志扬
邹为奇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SKYSEA REFRIGERATION & ELECTRICAL EQUIPMENT Co Ltd
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SKYSEA REFRIGERATION & ELECTRICAL EQUIPMENT Co Ltd
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Priority to CN201310321225.2A priority Critical patent/CN103392796B/en
Publication of CN103392796A publication Critical patent/CN103392796A/en
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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 mainly adopts of China and even the whole world mainly contains directly method of the burning energy or crops of " fuel oil-air-supply " " burn wood-air-supply " or other.
The unit that " fuel oil-air-supply " reaches " burn wood-air-supply " is all fuel type, can increase flue dust, CO, CO 2Deng the discharging 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 yet more can increase the weight of the pollution of environment the energy supply pressure of country." 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 " reaches " burn wood-air-supply " unit is all that mineral and biology act as a 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 that in prior art, oven dry cereal technique exists serious, the drawback that use cost is high, can be efficiently to the cereal heating, drying.
The present invention is achieved through the following technical solutions: grain-drying technique comprises the steps: 1) cereal is packed into after go-cart and sent into drying tower; 2) start the heat pump drying unit that is 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 after condenser and is cooled into liquid and emits amount of heat; Condensed liquid passes through the 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 heats and then passes 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 when the humidity that cereal detected reached settings, described compressor cut out, thereby took out described cereal.
In technique scheme, pass into the air themperature of described drying tower between 50 ℃-60 ℃.
in technique scheme, be rotationally connected the cereal container by rotating shaft in described go-cart, described cereal container comprises two flaring accommodation sections, be fixedly connected with by baffle plate between described accommodation section, the through hole that passes 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, at first open the opening of accommodation section, then close cover plate after pouring cereal into, rotating shaft drives by a drive unit, be provided with controller on drive unit, controller makes the every mistake of rotating shaft rotate 180 degree in 1 minute to 3 minutes, this moment, the cereal in accommodation section just fell into another accommodation section from the through hole of middle baffle plate therein, make cereal be heated more even.
1, the present invention has following beneficial effect: environmental protection is good:, without any pollution, without any burning, efflux thing in the present invention, 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 is namely inputted the electricity of 1kw between grain harvest general 3-5 in season, can produce the heat of 3-5kw, compare with the direct burning energy or crops, will save a lot on use cost.
3, security performance is good, and 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.
Description of 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.
The specific embodiment
Below in conjunction with accompanying drawing and the specific embodiment, the present invention is described in further detail: referring to Fig. 1, grain-drying technique, comprise the steps: 1) cereal is packed into after go-cart and sent into drying tower; 2) start the heat pump drying unit that is 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 after condenser and is cooled into liquid and emits amount of heat; Condensed liquid passes through the 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 heats and then passes into drying tower by pipeline in condenser;
Have the device that detects described cereal humidity in described drying tower, when the humidity that cereal detected reached settings, described compressor cut out, thereby took out described cereal.
Pass into the air themperature of described drying tower between 50 ℃-60 ℃, this temperature can obtain grain-drying effect preferably when obtaining larger Energy Efficiency Ratio.
be rotationally connected the cereal container by rotating shaft (accompanying drawing does not show) in described go-cart 3, 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 that passes 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, at first open the cover plate 41 of accommodation section 40, then close cover plate 41 after pouring cereal into, rotating shaft drives by a drive unit, be provided with controller on drive unit, controller makes the every mistake of rotating shaft rotate 180 degree in 1 minute to 3 minutes, this moment, the cereal in accommodation section 40 just fell into another accommodation section 40 from the through hole 43 of middle baffle plate 42 therein, make cereal be heated more even.The outer wall of described container is netted, be convenient to environment in hot-air effectively contact, be 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 that is communicated with described air inlet 10, described device for cleaning pipeline is crossed condenser 13 and and described drying tower 2 connections of each refrigerant circulation loop.
Be provided with roller 17 in described heat pump drying unit 1 bottom, make unit to move 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 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 the low-temp low-pressure gas compression gas of HTHP; Thereby the gas of HTHP enters after condenser and is cooled into liquid 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, evaporation in evaporimeter 16 finally, heat in absorbing environmental, enter compressor by cross valve finally, iterative cycles like this, cold-producing medium working medium absorbs the heat of air in evaporimeter, under the mechanism of compressor, the evolution of heat from condenser, change 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 the reciprocation cycle phase transition process characteristic of uninterruptedly absorbing heat with heat release, 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 of the relative traditional combustion oven dry of the Energy Efficiency Ratio during oven dry is more than 3-5 times.
Surrounding air enters dryer by the first blower fan from the dryer air inlet, at first be heated into the hot-air of uniform temperature by the condenser in one of them refrigerant circulation loop, hot-air makes atmosphere temperature rising become the heated drying air of 55 ℃ of left and right through the condenser in another refrigerant circulation loop this moment again.Enter drying tower from the drying tower air inlet cereal is dried, by the drying tower exhaust outlet, the moisture content in cereal is taken away finally.

Claims (3)

1. grain-drying technique, is characterized in that: comprise the steps: 1) cereal is packed into after go-cart and sent into drying tower; 2) start the heat pump drying unit that is 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 after condenser and is cooled into liquid and emits amount of heat; Condensed liquid passes through the 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 heats and then passes 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 when the humidity that cereal detected reached settings, described compressor cut out, thereby took 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 ℃-60 ℃.
3. grain-drying technique as claimed in claim 1, it is characterized in that: be rotationally connected the cereal container by rotating shaft in described go-cart, described cereal container comprises two flaring accommodation sections, be fixedly connected with by baffle plate between described accommodation section, the through hole that passes 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, at first open the opening of accommodation section, then close cover plate after pouring cereal into, rotating shaft drives by a drive unit, be provided with controller on drive unit, controller makes the every mistake of rotating shaft rotate 180 degree in 1 minute to 3 minutes, this moment, the cereal in accommodation section 40 just fell into another accommodation section 40 from the through hole 43 of middle baffle plate 42 therein, make cereal be heated more even.
CN201310321225.2A 2013-07-29 2013-07-29 Cereal drying process Active CN103392796B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105546966A (en) * 2015-12-31 2016-05-04 中国科学院理化技术研究所 Continuous heat pump drying system for dry fruits
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

Citations (3)

* 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

Patent Citations (3)

* 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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
黄胜春等: "热泵技术的应用现状及其发展", 《冶金丛刊》 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105546966A (en) * 2015-12-31 2016-05-04 中国科学院理化技术研究所 Continuous heat pump drying system for dry fruits
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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