COFCO Engineering Equipment (Zhangjiakou) Co., Ltd. is one of the most reliable manufacturers and suppliers of batch grain tempering unit in China. With abundant experience, we warmly welcome you to buy durable batch grain tempering unit in stock here from our factory. We also accept customized orders.
The batch grain tempering unit conditions cleaned wheat and other milling grains by uniformly introducing and absorbing moisture over a controlled retention period prior to the grinding process, optimizing kernel hardness differences and preventing bran shattering during subsequent roller milling.
Key Technical Specifications
|
Parameter |
Specification |
|
Capacity Range |
5t/h to 30t/h per batch cycle |
|
Tempering Duration |
2 hours to 24 hours (PLC controlled) |
|
Moisture Accuracy |
Within ±0.1% deviation target |
|
Wetted Materials |
304 stainless steel with food-grade welds |
|
Discharge Design |
Pneumatic slide gate with mass-flow hopper |
|
Power Supply |
380V, 50/60Hz, 3-phase |
|
Control Protocol |
Industrial HMI with MODBUS / PROFINET |
Key Features & Structural Benefits
Precise Moisture Distribution: High-atomization spray nozzles combined with continuous agitation ensure instantaneous water film coverage on individual kernels before gravitational settling.
Kernel Integrity Protection: Engineered mass-flow internal baffle design prevents mass compression and core friction, keeping the breakage rate below 0.05%.
Sanitary Interior Design: Smooth wall transitions and zero-dead-zone hopper angles eliminate residual grain accumulation, preventing mold formation and insect infestation.
Automated Mass Tracking: Integrated load cells monitor real-time mass changes, automatically adjusting water feed valves according to incoming grain dry weight.
Target Applications
Wheat Flour Milling: Conditioning hard and soft wheat varieties to toughen bran layers and soften endosperm for maximum extraction rates.
Durum Semolina Processing: Precise hydration control for durum wheat to achieve optimal particle size distribution and high semolina purity.
Corn Dry Milling: Moisture conditioning of maize kernels to facilitate efficient germ and hull separation in snack production lines.
Multi-Grain Processing: Uniform moisture integration for sorghum, barley, and rye prior to roller reduction or pearling operations.
Working Principle
Mass Measurement:
Incoming grain passes through an automated inlet valve into the weighing hopper, where load cells record the exact dry mass.
Atomized Spray Hydration:
Grain cascades past precision atomizing nozzles where calculated water volumes inject directly into the grain stream.
Controlled Retention:
Hydrated grain settles into the vertical tempering bin, operating on a first-in, first-out mass flow principle over the programmed holding duration.
Discharge & Transfer:
Upon retention completion, the pneumatic slide gate opens, feeding conditioned grain smoothly to downstream first-break roll stands.
Installation & Maintenance Guidelines
Modular Rigging: Delivered in modular pre-assembled sections, allowing direct bolting onto existing concrete or structural steel mezzanine floors without field welding.
Calibration Protocols: Built-in diagnostic software guides operators through load cell tare calibration and flow meter verification during initial commissioning.
Inspection Access: Large inspection hatches equipped with safety interlocks provide direct access to interior hopper walls and sensor calibration points.
Preventive Upkeep: Sealed heavy-duty bearing assemblies require grease replenishment every 1,000 operating hours; pneumatic cylinders feature quick-disconnect fittings.
Packaging & Logistics
Units are wrapped in heavy-duty moisture-barrier polyethylene film, secured inside fumigation-free wooden crates, and braced with internal steel frames.
Machined carbon steel surfaces receive industrial rust-inhibitor coatings; electrical enclosures are sealed with silica gel desiccant packs.
Standardized lifting lugs and forklift channels integrated into the base frame ensure safe overhead crane hoisting and container loading.
Shipments include English electrical schematics, PLC source code backup, material mill test certificates, and dimensional assembly drawings.
Frequently Asked Questions
Q: How does the unit prevent moisture evaporation during long retention cycles?
A: The tempering bin features an airtight, double-wall insulated enclosure combined with gasket-sealed top inspection lids, restricting internal airflow and preventing ambient moisture loss.
Q: Can the system interface with existing plant automation networks?
A: Yes, the control panel supports standard industrial fieldbus communication protocols, allowing direct integration into centralized supervisory control and data acquisition systems.
Q: What maintenance is required for the atomizing nozzles?
A: Nozzles are fitted with quick-release threaded connections and inline self-cleaning strainers, permitting visual inspection and flushing in under ten minutes without dismantling the piping network.
Q: How is grain bridging prevented in high-capacity vertical bins?
A: The mass-flow hopper incorporates an engineered conical discharge angle of 65 degrees coupled with variable-speed mass flow control gates, ensuring consistent core and boundary movement.
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