Grain drying method and system

A grain drying and grain drying technology, which is applied in the direction of drying solid materials, drying gas arrangement, control/regulation system, etc., can solve the problems of over-drying and long drying time, and achieve the effects of ensuring quality, efficient drying, and preventing over-drying

Inactive Publication Date: 2021-01-05
HENAN UNIV OF SCI & TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a grain drying method and system, which are used to solve the problems of excessive drying or long drying time caused by grain drying machines in the prior art using constant power for drying

Method used

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  • Grain drying method and system

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Embodiment Construction

[0028] During the drying process of grain, its moisture activation energy is divided into its own free water E1, the activation energy Ew of physically bound water, and the activation energy Ea of chemically bound water. In the early stage of drying, it is the process of drying physically bound water and free water, and the drying process can be accelerated by using high temperature; in the later stage of drying, there is a process of converting chemically bound water into free water, and it is necessary to reduce the drying temperature to realize heat input and drying kinetics process matches.

[0029] Using this phenomenon, the whole process of drying grain is divided into three stages. In each stage, the grain dryer uses different input power of hot air. In the first stage, the output temperature of the grain dryer is controlled to be higher, and in the second stage, the temperature of the grain is controlled. The dryer stops the drying operation, and controls the grain dry...

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Abstract

The invention belongs to the technical field of grain drying, and particularly relates to a grain drying method and system. The method comprises the following steps of monitoring the water content ofgrains in real time, drying the grains to be dried at a set initial high temperature, and controlling to reduce the water content of the grains; when the water content of the grain is reduced to the set tempering starting water content, stopping the drying operation until the grain temperature is reduced to the set tempering finishing temperature; and when the grain temperature is reduced to the set tempering finishing temperature, drying the grain at the set tempering finishing temperature until the water content of the grain is reduced to the set drying finishing water content, thereby finishing grain drying. According to the grain drying method, rapid drying is conducted at a high temperature, tempering is conducted, drying continues to be conducted at a low temperature, the phenomenonof excessive drying is prevented, the grain quality is guaranteed, energy is saved, consumption is reduced, and grain drying is completed efficiently.

Description

technical field [0001] The invention belongs to the technical field of grain drying, and in particular relates to a grain drying method and system. Background technique [0002] The grain (such as wheat) drying process is the heat and mass exchange process between grain and dry heat medium. The traditional natural drying method is time-consuming and labor-intensive, and has a low degree of automation. [0003] In order to improve this phenomenon, grain dryers have appeared. At present, the mainstream grain dryers on the market have constant hot air input power throughout the drying process. Drying with constant power does not dry well. If the power setting is too high, it can meet the drying requirements at the beginning of drying, but as the degree of grain drying decreases, it will lead to excessive drying, grain particle crushing, and excessive energy consumption. If the power is set too low, the entire drying process will take too long. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B25/22F26B21/10F26B21/08G05D27/02
CPCF26B21/08F26B21/10F26B25/22G05D27/02
Inventor 朱文学谭新圆白喜婷罗磊徐梦凡卫志娇余政毫司梦佳宁阳阳
Owner HENAN UNIV OF SCI & TECH
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