Quantitative determination method of carbon dioxide concentration in grain stored in grain bin

A carbon dioxide, quantitative detection technology, applied in the direction of electrochemical variables of materials, sampling devices, etc., can solve problems such as difficulty, unlimited length of gas pipelines, large errors, etc., to achieve the effect of ensuring strength and elasticity

Inactive Publication Date: 2014-12-10
HENAN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

Existing methods do not limit the length, inner diameter, and materials and parameters related to the amount of air pumping required for detection. Although the carbon dioxide gas concentration in a certain part or various parts of the grain pile can also be detected, the detection cannot be tolerated. There are many determined influences, resulting in large errors. It is very difficult to analyze the activity status of insects and molds in stored grains from the differences in the detected concentration changes.

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  • Quantitative determination method of carbon dioxide concentration in grain stored in grain bin

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with embodiment (accompanying drawing):

[0028] Such as figure 1 As shown, the present invention will be described in further detail below in conjunction with a 24 m * 30 m bungalow warehouse, and the monitoring of the carbon dioxide concentration of stored grains at a height of 6 m:

[0029] In the grain pile 2 of the granary 1 with a length of 30 m and a width of 24 m, select 5 points in the length direction and 4 rows in the width direction, a total of 20 points to be evenly distributed, and place 20 silicone gas pipelines 3 with a diameter of 2 mm × 3 mm. Cut to a length of 30 m, one end of the gas pipeline 3 is buried in the grain pile at a depth of 3 meters according to the set point, and the other end is concentrated in the middle of the granary; when detecting the concentration of carbon dioxide gas, one of the gas pipelines 3 is connected to the micro-float The flow meter inlet 4 of the flow...

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Abstract

The invention discloses a quantitative determination method of carbon dioxide concentration in grain stored in a grain bin. According to the method, by a control method of pipe resistance balance, two-time flow regulation, flow display and gas shunt during gas sampling in the grain bin, gas samples at each monitoring positions of grain bulk in the grain bin are sent into a gas sensor at the same and determined gas acquisition amount, stable flow velocity and mini flow, so as to realize accurate detection of carbon dioxide concentration of the grain bulk.

Description

technical field [0001] The invention relates to the technical field of grain storage safety monitoring, in particular to a method for accurately measuring the concentration of carbon dioxide at each monitoring point of a grain pile in a granary. Using the detection data of the change of the carbon dioxide concentration in the grain pile, it is possible to understand the presence of living medium in the grain pile. Metabolic status provides a basis for monitoring and judging grain storage safety. Background technique [0002] The scale of my country's grain reserves is huge, and the most important work is the prevention and control of insects and molds during storage. Because the growth and metabolic activities of insect molds not only consume the quantity of food, cause deterioration of food quality, but also may cause serious food safety problems. Aflatoxin, which is highly toxic and carcinogenic, is produced by the growth and metabolism of molds such as Aspergillus flavu...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/24G01N27/26
Inventor 蔡静平蒋澎张燕燕黄淑霞
Owner HENAN UNIVERSITY OF TECHNOLOGY
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