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Why are drying towers used in grain silo systems?

Feb.10, 2023Keywords:Grain Drying Tower, Dryer Tower, Grain Silo

Reasons for using a drying tower in grain silo

Nowadays, many food processing plants or owners of grain (corn, soybean, wheat, etc.) have a soft spot for drying towers when buying grain silos. Because when they have a drying tower, they no longer have to worry about drying the grain. If the grain is not dried to a certain extent and stored in the grain silo, it will cause mold and deterioration of the grain and reduce its economic value. At the same time, it can realize modern grain collection and storage operations, realize the mechanization of the whole process of "planting-plant protection-harvest-drying-storage" of grain, and improve economic benefits for owners engaged in storage and processing. The use of the grain drying tower promotes the speed of agricultural production and processing, brings great convenience to people's production and life, and has a very good drying effect.

Introduction of drying tower

The drying tower is composed of a grain storage section, a drying section, a slowing section, a cooling section, a grain discharge section, an elevator, an environmental-protection hot-air stove, a cooling and unloading system, an automatic grain moisture detector, and an automatic electronic control device. It is often used for large-scale grain storage and suitable for drying high-quality grains such as rice, sorghum, soybean, corn, and wheat. Grain drying towers are mainly divided into two types: continuous type dryer tower and batch type grain dryer tower. Continuous grain drying towers are widely used for drying large-capacity and high-moisture crops, capacity from 100ton per day to 1000ton per day in 24 hours working time. Batch type grain dryer is widely used for small capacity paddy, seeds and oil crops drying, and can maintain the biological activity of grain to the greatest extent.

Working principle of drying tower

In the top drying stage of the drying tower, the high-heat air heats up the grain rapidly and takes away part of the grain surface moisture; After passing through the drying section, the material enters the slow drying section, where the inner and outer layers of the grain granules undergo moisture and heat exchange, which balances the moisture in the inner and outer layers of the material granules, which can effectively protect the grain quality; in the medium-heat stage, moderately heated air takes away a large amount of moisture; After the high-heat and medium-heat stages, the grain temperature increases, so the bottom drying stage uses low-heat air. The low heat air can easily take away much more water, but keep the grains from getting too hot. Finally, the dried grain enters the cooling stage, after sufficient cooling, the grain with safe moisture and temperature can directly enter the silo for storage. For high-moisture raw material crops, a multi-stage drying and multi-stage slow drying process is usually used.

Features of drying tower

1.Excellent food quality
The grain loses water evenly when heated, the heat damage is small, the breakage rate is low, the grains are full and complete, the drying moisture is even, and it is convenient for storage.
2.Easy operation
The control system has a high degree of automation and is easy to operate. It can automatically measure the moisture content and stop automatically after reaching the set value.
3.High drying efficiency
The intelligent drying technology is adopted to automatically adjust the drying temperature and time to meet the requirements of different humidity grains, so that the grains are heated evenly, with a low burst rate and a high germination rate. After drying, the grain particles are complete to ensure the quality of the grain.
4.Eco-friendly cleaning
Equipped with an environmentally friendly hot air stove to ensure that the grain is not polluted, at the same time, it has less noise and vibration than similar products, saves fuel, has low cost and has a long life.

Precautions when using the drying tower

1.Pay attention to the maintenance of grain drying tower
The burner of the grain drying tower should be cleaned regularly, check the tightness or deviation of the V-belt of the lifting conveyor belt, and adjust it appropriately according to the situation. If it is not used for a long time, loosen the conveyor belt and drive belt.
2.Key points for safe operation
Do not touch the burner with your hands during operation, and do not put your hands into the hopper when entering the grain. When troubleshooting, wait until the machine stops running. Smoking is strictly prohibited on the job site, and fire extinguishing equipment is provided.
3.Grasp the degree of drying
Different grain storage has different drying requirements. Generally, rice can be dehydrated to 13.5% in indica rice and 14.5% in late japonica rice. For grain drying towers with automatic moisture content determination devices, check whether the readings are correct during initial use, and correct them if necessary. When testing moisture, the knob should be adjusted to the corresponding grain position for different grains, so that the readings will not be wrong. The machine can only be shut down when the grain meets the drying requirements.
4.Avoid grain scorching
If the drying tower is shut down for a long time, but the heat supply is not stopped, the materials in the machine will carry a lot of heat and cannot flow, and the heat will not be dissipated, which will cause local overheating. The drying system of the drying tower is a closed space. If the material circulation is not smooth during the working process, it will easily lead to the accumulation of materials in the machine.

About Sron Silo Engineering

HENAN SRON SILO ENGINEERING Co., Ltd. is China leading reputable EPC Contractor for grain storage silo project, closed storage yard, and grain port handling project for grain silo storage solution etc. SRON has the qualifications of Main Contractor for civil construction projects, Main Contractor for mechanical and electrical projects, and Specialized Contractor for steel structure project. We have the complete qualifications in the field of bulk material storage and transportation in China. 

SRON focuses on scientific and technological research, achieving new researching technologies each year. Currently we have 
62 patented technology, among which 7 are invention patents.

SRON have built projects in more than 30 countries and regions, including Russia, South Africa, Indonesia, Malaysia, Kenya, Mongolia, Philippines, Peru and so on, with more than 900 sets of steel silos and up to 3 million tons of materials storage capacities, SRON quality and reputation are highly recognized by global users. For more information about Sron Silo Engineering and the Storage silo solution, please 
contact us or leave your requirements.

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