Industrial Grain Chiller for Bulk Grain Storage

Industrial grain chiller is a dedicated aeration cooling unit for silos, flat grain depots and bulk grain warehouses. It generates stable low-temperature, low-humidity dry air and forces it through grain piles via silo bottom ventilation ducts. It suppresses grain respiration, kills grain pests, avoids mold & mycotoxin growth, and extends safe storage lifespan without heavy chemical fumigation.

Core Storage Design Parameters

- Target grain temperature after cooling: ≤15°C for long-term preservation; ≤23°C for temporary summer storage

- Supply air relative humidity: stably controlled at 60%–65% (prevents grain moisture loss or surface condensation)

- Airflow standard: 2–4 L/s per ton of stored grain

- Unit outlet static pressure: 300–600 Pa (overcome airflow resistance of thick grain bulk)

- Ambient working range: -10°C ~ 55°C (custom high-temp version for desert regions)

Key Specialized Construction Features

Multi-stage Dust Filtration System (anti-chaff, grain husk & dust)

1. Washable metal mesh primary filter: intercept large straw, bran and coarse debris

2. G4 medium filter: block fine grain dust; quick-release frame for daily disassembly & cleaning

Refrigeration Circuit with Hot Gas Reheat (mandatory for grain storage)

- Oversized evaporator coil for deep dehumidification to remove excess moisture

- Built-in hot gas bypass reheat system: adjusts air temperature independently after dehumidification, avoids super-cooling that dries grain unevenly

- Scroll / semi-hermetic compressors for 24h non-stop continuous operation

- High & low pressure, overload, anti-freeze multi-protection

High-static heavy-duty supply fan

Centrifugal fan with reinforced impeller, VFD speed regulation; delivers enough pressure to penetrate thick grain layers evenly without dead hot zones in silos.

Full anti-corrosion & food-safe structure

- Cabinet: hot-dip galvanized steel + epoxy anti-rust coating; optional 304 stainless steel for coastal salt-air areas

- Drainage system: sloped stainless steel drain pan + deep anti-siphon P-trap, prevents condensate backflow and algae sludge blockage

- All internal brackets, fasteners are anti-corrosion treated

Intelligent PLC Grain-specific Control System

- Real-time monitoring: grain pile temperature, supply air T&RH, outdoor ambient data

- Automatic cycle cooling logic based on preset grain safety temperature

- Overheat, filter clog, refrigerant pressure fault alarm with signal output

- Compatible with grain depot central BMS remote monitoring