Stored grain temperature adjusting method

A technology of temperature regulation and grain stacking, which is applied in the direction of freezing/cooling to preserve seeds, food processing, etc., which can solve the problems of long working hours, inability to reduce the temperature of the grain on the upper layer of the grain stack, and high energy consumption, so as to reduce operating costs and reduce The effect of grain temperature and energy saving in the whole warehouse

Inactive Publication Date: 2010-12-22
陈国利 +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the operation method of the axial flow fan on the gable wall of the warehouse is often used to dissipate heat from the granary, that is, at night on a sunny day with low temperature and humidity, the doors and windows are opened, and then the axial flow fan is turned on to allow the air outsid

Method used

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  • Stored grain temperature adjusting method

Examples

Experimental program
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Effect test

Embodiment 1

[0016] Control warehouse No. 2, the experiment time was 7:30 pm on July 5, 2009, the ambient temperature outside the warehouse was 31°C, the accumulated temperature in the granary space was 38°C, and the temperature on the upper layer of the grain pile was 32°C. Traditional ventilation and heat dissipation were adopted. method, open the two symmetrical windows farthest from the axial flow fan on the top of the warehouse, and turn on the axial flow fan on the top of the warehouse for a total of 12 hours.

Embodiment 2

[0018] Experimental warehouse No. 1, the experiment time was 5:30 pm on July 5, 2009, the ambient temperature outside the warehouse was 33°C, the accumulated temperature in the granary space was 38°C, and the grain temperature on the upper layer of the grain pile was 32°C. Close all doors, windows and vents, and turn on the axial flow fan on the top of the silo for 2 hours without the entry of outside air. Stop the machine to detect that the accumulated temperature in the granary space has dropped from 38°C to 28°C, and the grain temperature on the upper layer of the grain pile has dropped from 32°C to 28°C. ℃. After that, from July 6th to July 29th, it will be turned on for 2 hours at around 6:00 pm every day. Using this method for temperature adjustment, the grain temperature in the upper layer of the grain pile does not exceed 28°C, the grain temperature in the middle and lower layers rises by 1°C in 14 days in total, and the average daily rise is less than 0.1°C, which has...

Embodiment 3

[0020] Control warehouse No. 2, the experiment time was 7:30 pm on August 2, 2009, the ambient temperature was 33°C, the temperature of the granary space was 38.5°C, and the temperature of the upper layer of the grain pile was 33.5°C. Open all the windows of the warehouse to allow the heat in the grain pile to dissipate naturally from the windows. Connect three 45kw grain coolers to the vents of the above-ground cages, and start up and run continuously to supplement cooling. Because the grain cooler is only used alone, the cold air enters through the vent, and the cold air can only rely on its own pressure to make the cold air go up slowly and penetrate the grain layer. After 240 hours of cold, that is, at 7:30 pm on August 12, the temperature on the upper layer of the grain pile dropped from 32°C to 20°C.

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Abstract

The invention discloses a stored grain temperature adjusting method, which comprises the following steps of: A, closing all windows and ventilation openings of a warehouse to make the warehouse in a sealed state; and B, starting an axial flow fan on the top of the warehouse to make the whole warehouse and grain piles form negative pressure, discharging the accumulated temperature of the warehouse space part, and making the cold air of the cold cores of the grain piles move to the upper layers the grain piles so as to reduce the grain temperature of the upper layers of the grain piles and the temperature in the warehouse and meet the temperature requirement of temperature-controlled stored grain. The method also comprises a step of compensating cold quantity by using a refrigerator, wherein the axial flow fan on the top of the warehouse is started in the step B, when the accumulated temperature of the warehouse space and the grain temperature of the upper layers of the grain piles is reduced by not more than 28 DEG C, the ventilation openings of a ground cage ventilation pipe network of the warehouse are opened and linked with the refrigerator, and the refrigerator is started for refrigeration, so the stored grain temperature can be reduced and the requirement of standard low-temperature grain storage is met. Because a sealed system is adopted and the negative pressure is formed in the warehouse and the grain piles, the radiating speed of the granary is improved, the cold sources of the cold cores of the grain piles are effectively utilized, the energy is saved and the operating cost is reduced.

Description

technical field [0001] The invention relates to a method for regulating the temperature of stored grain, belonging to the technical field of grain storage. Background technique [0002] Temperature-controlled or low-temperature storage of grain (including quasi-low temperature storage) can effectively inhibit the growth of grain respiration and storage pests and microorganisms, reduce or avoid the use of chemical drugs to kill insects and sterilize, slow down the rate of aging and deterioration of grain and water loss, Therefore, it has been widely used. Especially in the process of grain storage in winter. Mechanically ventilate the stored grain by using the dry and cold outside air, and force the hot and humid air in the grain pile to exchange with the dry and cold air outside, which can effectively change the air state in the grain pile and significantly reduce the temperature of the grain, and the difference between the temperature of the warehouse and the temperature o...

Claims

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Application Information

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IPC IPC(8): A23B9/10
CPCY02P60/85
Inventor 陈国利罗绍华谢令德贺艳萍徐向东
Owner 陈国利
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