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Process method for rapidly drying grains through countercurrent gas flow

A technology of rapid drying and process method, which is applied in the direction of saving seeds through drying, adapting to climate change, etc., and can solve problems such as difficult to improve the efficiency and capacity of drying equipment

Active Publication Date: 2013-08-07
天津格物兴业热能科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because the structure and working principle of the two are similar, the two kinds of drying equipment also show the same problem in terms of drying performance, that is, the hot air used is also sent into the drying room after being heated outside the dryer. After entering the drying room, it is impossible to obtain heat supplement and maintain its proper drying temperature and capacity during the drying process, so it is difficult to improve the efficiency and capacity of the drying equipment

Method used

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  • Process method for rapidly drying grains through countercurrent gas flow

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specific Embodiment approach

[0062] The technological process of countercurrent type airflow fast drying grain that the present invention relates to, its technological process and specific embodiment are:

[0063] According to the characteristics of the grain to be dried, the moisture content and the drying capacity, according to the process method and main equipment performance described in the present invention, design and form an operating system that conforms to its technological process. This operating system needs to have flexible process adaptability and Efficient drying capacity, and meet the requirements of energy saving and consumption reduction, safety and environmental protection.

[0064] According to the different grain properties or drying process, the operating system designed according to the process method can be used as two operating systems with different operation modes, one is an operating system for implementing two-stage drying treatment on grain, and the other is It is an operatin...

Embodiment 1

[0085] The grain to be dried is rice with a moisture content of 30%, and the moisture content of the dried rice is required to be less than 13%, and the drying capacity of the process operating system is 20 tons / hour.

[0086] The characteristics of the dried grains are: the drying of non-breeding rice is mainly to remove its external moisture and part of its internal moisture, the main part of which is easy to remove external moisture, although its internal moisture is small and the rice grains are relatively small, but because of the rice Shell coating makes it difficult for the internal moisture to escape quickly. At the same time, if the working temperature of the drying medium is too high, the rice in the later stage of drying will be cracked or broken. The drying medium temperature and heating conditions need to be limited during the process. In addition, due to the limited conditions of the grain drying treatment site, the paddy cannot be preheated before the drying tre...

Embodiment 2

[0114] The grain to be dried is corn with a moisture content of 25%, and the moisture content of the dried corn is required to be less than 12%, and the drying capacity of the process operating system is 20 tons / hour.

[0115] The characteristics of the dried grains are: the drying of non-breeding corn is mainly to remove its external moisture and part of its internal moisture, but the corn grains are large and dense, and its internal moisture is difficult to quickly escape, and the working temperature of the drying medium is too high. After the corn skin becomes hard and cracks, the temperature of the corn exceeds 60°C, and its external and internal quality will decrease. Therefore, the drying medium temperature and heating conditions need to be limited during the drying process. In addition, corn cannot be properly preheated before drying due to the conditions of the grain drying treatment site. For this reason, it is necessary to adopt a two-stage drying process, that is, u...

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Abstract

The invention belongs to the technical field of grain drying, and relates to a process method for rapidly drying grains through a countercurrent gas flow. The process principle is that: based on characteristic conditions and drying process requirements of different types of grains, a grain drying process is divided into preheating, drying, tempering, cooling and other process steps; based on grains requiring drying and having different heat sensitivities and moisture contents, a difference treatment process is adopted at the drying stage to carry out effective drying in stages, and a waste heat recovery and utilization technology is adopted at the preheating stage and the cooling stage to reduce power consumption of the process and improve drying capacity of the system; according to drying process conditions of different grains, different drying mediums are selected to carry out countercurrent gas flow drying; and a working temperature and a flow rate of the drying medium are controlled, such that the grain can be subjected to rapid dewetting under an acceptable temperature condition so as to achieve a grain drying purpose, and the dried grain can meet quality requirements.

Description

technical field [0001] The invention belongs to the technical field of grain drying, and relates to a process method for rapid drying of grain by countercurrent airflow. The process principle is to divide the grain drying process into preheating, drying, slowing down and cooling process stages according to the characteristic conditions and drying process requirements of different types of grains. For the grains to be dried with different heat sensitivity and moisture content, In the drying stage, the process of differential treatment is used for more effective staged drying, and the waste heat recovery and utilization technology is used in the preheating and cooling stages to reduce the energy consumption of the process and improve the drying capacity of the system; according to the drying process conditions of different grains , choose different drying media for countercurrent air drying; by controlling the working temperature and flow rate of the drying media, the grain can ...

Claims

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Application Information

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IPC IPC(8): A23B9/08
CPCY02A40/90
Inventor 陈南岭
Owner 天津格物兴业热能科技有限责任公司
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