Low-temperature circulating drying, flexible batches, good grain quality and low breakage rate

    Independently developed by Zhengzhou Wangu Machinery Co., Ltd., the recirculating grain dryer is an energy-saving intelligent drying equipment tailored for small-batch, multi-batch and multi-crop alternating drying scenarios. Different from large-scale continuous concurrent and counter-current drying towers, this machine features closed-loop recirculating drying, low-temperature repeated tempering, flexible start-stop operation and multi-functional application. It is specially designed for township cooperatives, family farms, small grain stations and grain traders to solve the problems of concentrated harvesting, limited site and mixed drying batches.

    This dryer is suitable for corn, rice, wheat, soybean, rapeseed, sesame, sorghum and other grain and oil crops. It supports batch circulating dehydration for newly harvested high-moisture wet grain. Through automatic grain recycling, repeated drying, intermittent tempering and uniform cooling in closed circulation mode, the equipment stably reduces grain moisture with uniform drying effect. It effectively avoids grain cracking, scorching and half-dried defects, prevents mildew and deterioration during storage, and significantly improves grain head rice rate, bulk density and commercial grade.

    Adopting an exclusive closed low-temperature internal circulation drying process, the equipment realizes multiple mild heat exchange and layered dehydration. It balances internal and external moisture of grain particles gradually, completely solving grain cracking and surface burning caused by traditional one-time high-temperature drying. Equipped with intelligent touch control system, automatic circulating temperature control and adjustable discharging speed module, the machine matches exclusive drying curves for different crops and initial moisture levels, supporting flexible start-stop, material supplement and discharging without continuous full-load operation restriction.

    With an integrated and compact structure, the equipment integrates automatic feeding, circulating drying, layered tempering, silent cooling, automatic discharging and dust removal. It covers a small area, requires no large civil foundation, and can be installed indoors or outdoors. The silent flexible grain lifting structure avoids rigid friction and stirring, ensuring ultra-low breakage rate and complete grain appearance.

Working Principle & Core Advantages

    The dryer adopts a closed multi-cycle drying system, forming a professional process of low-temperature circulating dehydration — layered static tempering — internal moisture balance — silent air cooling. Wet grain is lifted into the drying chamber for the first low-temperature heat exchange, then falls back to the storage cavity for static tempering to promote internal moisture penetration. Afterwards, the grain is lifted again for secondary circulating drying. By repeated small-amplitude dehydration and gradual heat-moisture balance, it replaces the traditional high-temperature one-time drying mode.

    The unique circulating process brings prominent advantages: mild dehydration load on grain particles fundamentally reduces rice burst cracking, corn fissuring and color darkening. The uniform circulating hot air duct ensures no temperature dead zone inside the chamber with consistent drying effect for every batch. The fully closed circulating operation together with independent dust removal system guarantees clean grain surface and dust-free environment.

Core Product Features

1. Low-temperature Recirculating Drying with Superior Grain Quality

Multi-frequency low-temperature gradient circulating drying realizes synchronous moisture balance inside and outside grain particles, retaining original grain color, taste and activity. It greatly improves head rice rate and whole-grain rate.

2. Ultra-flexible Batch Operation for Small-scale Demand

No 24-hour full-load continuous operation required. It supports small-batch multi-frequency drying with free start-stop and mid-batch feeding, perfectly adapting to scattered drying needs of individual farms and grassroots grain stations.

3. Closed Hot Air Circulation for Energy Saving

Internal hot air closed-loop recycling improves waste heat utilization rate, effectively reducing heat and wind consumption. It achieves high cost performance especially for small-batch drying.

4. Low-breakage Silent Flexible Conveying

Adopts bucket-type soft lifting structure without rigid stirring and friction, minimizing grain collision damage and maximizing commercial grain value with low operating noise.

5. Intelligent One-touch Control, Easy Operation

Equipped with high-definition touch PLC system, pre-installed exclusive drying programs for various crops. One-click crop switching, automatic temperature control, circulating timing and automatic shutdown, supporting manual fine adjustment.

6. Multi-crop Universal Compatibility

No accessory replacement required. It adapts to grains, beans and oil crops, realizing high equipment utilization and multi-scene application.

7. Compact Integrated Structure with Easy Installation & Maintenance

Small footprint, portable and easy to install. No special factory building or complex foundation needed. Low daily maintenance cost and universal spare parts.

8. Environmentally Friendly Dust-free Operation

Equipped with integrated closed dust removal and purification device to meet township environmental protection standards, realizing compliant outdoor and courtyard operation.

Technical Parameters

Application Scenarios

    Wangu recirculating grain dryer focuses on small-batch, high-flexibility and high-quality drying. It is widely used in township planting cooperatives, family farms, individual grain traders, small miscellaneous grain processing factories and grassroots grain stations.

    It supports batch circulating drying for corn, rice, wheat, soybean, rapeseed, sorghum and millet throughout the year. It can operate multiple batches continuously in harvest peak season and work intermittently in off-seasons with high equipment utilization. The low-temperature circulating process preserves grain color, taste and germination rate, suitable for both commercial grain drying and seed grain preservation.

    The dust-free and low-noise closed design adapts to residential areas, courtyards and open outdoor sites with compliant and stable operation. The dried grain features stable and uniform moisture, effectively preventing heating, mildew and caking during long-term storage and greatly extending storage period.

Packaging & After-sales Guarantee

    The main body is packaged with industrial anti-rust protection with full scratch and moisture resistance. Precision components such as electric control cabinet, touch screen, sensors and motors are independently sealed and shockproof packaged to adapt to road and long-distance logistics transportation. Standard fasteners and vulnerable parts are separately packaged with complete installation accessories and operation manuals.

    All equipment is manufactured strictly in accordance with national standards and ISO quality management system. Every machine completes power-on test, circulating drying debugging and parameter calibration before delivery to ensure 100% qualified factory rate. We provide 12-month full machine warranty and             lifelong maintenance for core structures. One-stop services including on-site installation guidance, commissioning, professional operation training, remote technical support and long-term spare parts supply are available. Custom configurations such as upgraded temperature control and mobile base are supported. MOQ is 1 unit with flexible payment terms and stable delivery cycle.