Continuous Grain Dryer, Low-Temperature Tempering for Uniform Drying

      This series of continuous-flow grain drying towers incorporates the strengths of leading international designs and is custom-engineered for the climate conditions of different latitudes and humidity zones, building on Wangu’s years of design and manufacturing experience. What we offer is not "one machine for everyone" but "one process fitted to you": according to your crops, harvest moisture and local climate, the drying process — mixed-flow, co-current or co-counter-flow — is selected specifically for your project as a complete end-to-end solution.

      Capacity covers 100 to 2,000 tonnes per day. Clean hot air is the drying medium, supplied by furnaces fired with coal, oil, natural gas, straw or rice husk, or by steam heat exchange. The plant runs continuously with a high level of automation, installs in the open air, and suits grain depots, grain and oil processing plants and grain industrial parks — running non-stop from intake to storage.

Working Principle

1,Automatic level balancing: wet grain enters the dryer through the grain-distributing mechanism. When the grain level in the storage section reaches the low-level switch, the hot-air fan starts drying; at the mid-level switch, the level sensor sends an electric signal to start the discharge motor; at the high-level switch the system alarms and stops intake while discharge continues and the level falls; when it drops back to mid-level, intake resumes. The cycle repeats, and feed rate is tuned so the system always works in dynamic balance — full but never overflowing, draining but never running dry.

2,Drying path: grain flows from the storage section into the air-distribution section, where it spreads evenly into the ventilation tubes while hot air flows around the tubes and heats the grain. Grain and air then move downward together into the drying section, where the kernel is heated and its moisture vaporizes; the vapor leaves the machine as exhaust through the waste-air angle boxes, and the grain is dried. The dried grain then cools to a suitable temperature in the cooling section and leaves through the discharge section and hopper, ready to go straight into storage.

 Main Features

1,Large moisture reduction: up to 25% per single pass, so freshly harvested high-moisture grain reaches safe storage moisture in one pass through the tower — no second handling.

2,Strong adaptability: performs across regions and crops — maize, paddy, soybean, wheat, sorghum, rapeseed and other cereals and oil crops are all processable.

3,Thorough and even: drying is complete and uniform, tempering is ample and cooling is thorough; grain leaves the tower at proper moisture and temperature, ready to go straight into storage.

4,Clean medium, quality grain: clean air is the drying medium, free of contamination, so dried grain keeps good quality and normal colour.

5,Continuous and reliable: mechanized continuous operation with stable performance through the whole season; all-weather outdoor design needs no dryer building.

6,Centralized automatic control: intake, hot air and discharge are centrally and precisely automated, saving labour — one operator can run the whole drying line.

What It Really Delivers

1,No backlog in peak season: continuous intake and discharge keep the plant running through the harvest season on two shifts — grain is dried as it arrives instead of piling up in the yard.

2,Quality is price: ample tempering and thorough cooling mean fewer cracks, less breakage and better colour — for paddy that is head-rice yield, for maize the grade, for seed grain the germination rate.

3,Low running cost: the heat source is chosen from six options — coal, oil, gas, straw, rice husk or steam — matched to your local fuel prices, and energy-saving technologies keep specific heat consumption down, so drying cost stays predictable.

4,Less worry, less labour: level switches balance intake and discharge automatically and the PLC controls the line centrally, so one operator suffices; outdoor installation saves the cost of a dryer building.

5,Dry means store-ready: grain leaves at near-ambient temperature with uniform, on-target moisture and goes straight into the bin — no cooling or turning needed, no second losses.