How to choose the right grain dryer?

First, choose the right dryer according to the type of grain. Dryers are divided into cross-flow, down-flow and mixed-flow. Choose the right machine according to the drying time or the type of grain.

Second, choose the capacity of the dryer according to the quantity of grains and select the machine according to the productivity and sedimentation range of the dryer and the specific quantity of grains.

Third, combine the choice of regional resources, the use of dryers should be combined with local resources to ensure the normal use of dryers and reduce the cost of use.

Fourth, consider the use environment of grain dryer, and select the dryer according to the ambient temperature to avoid affecting the service life of the dryer.

How to purchase grain dryer?

1、Comprehensive analysis and reasonable configuration of dryer model and size

The configuration of grain dryer model and size is determined through comprehensive analysis based on the actual local situation and the requirements of two important indicators, namely the productivity and sedimentation range of the dryer. If the grain concentration production area has a large grain processing capacity during the drying season, a large high temperature fast dryer can be selected according to the actual situation.

2、Determine the production capacity of the dryer according to the service radius

Grain dryer should be large rather than small, because in most cases it is necessary to play the role of dryer when the harvest season meets the rainy season. Large drying capacity and low productivity does not solve this problem. Build large and medium-sized dryers in national and local grain reserves and grain producing areas. The working radius of fixed dryers should be small rather than large to reduce transport distances, reduce costs and increase efficiency. Mobile dryers can be used in rural areas where grain production is not concentrated and in small grain production areas in the south. The productivity is generally 2~5t/h, which is too small to be welcomed by users. Try to use more than one dryer. It is not only suitable for grain and grain varieties, but also for some cash crops. The service radius should be larger to play the role of mobile dryer.

3、Choose the drying heat source according to the local energy situation

When choosing a dryer, local energy must be considered to achieve reasonable use and reduce costs. For example, in grain producing areas with coal mines, coal, anthracite or coke is the best heat source and its price is economical, but the one-time investment of coal-fired hot air furnace is great. In grain producing areas with oil and natural gas, light diesel, heavy oil or natural gas and propane can be used as hot air furnace fuel. This fuel is costly, but the one-time investment in a hot air furnace is small. Dedicated seed dryer should use oil or natural gas hot air furnace because its wind temperature is stable and easy to control, which can ensure the germination rate of dried seeds.

4、Environmental conditions should be considered when choosing the dryer

Due to the different harvesting seasons of various crops and the temperature difference between the north and south drying process, it is necessary to consider the drying effect and operation cost. For example, in coastal areas, grain should be avoided as much as possible to dry in low temperature and wet weather, otherwise the dehydration effect is poor, the productivity is low and the drying cost is high. Nearly half of the time in northern China is dried below 0°C. The lower the external temperature is, the higher the unit heat consumption is and the higher the cost is. Therefore, the outer wall of the dryer and the hot air pipe running below 0℃ in the north should be insulated to reduce heat loss.