Dedicated steam boilers for feed mills need to provide saturated steam with stable pressure and dryness. They operate fully automatically, with automatic water feeding, ignition, pressure regulation, and multiple safety protections (e.g., overpressure, low water, flame failure). They have high thermal efficiency; modern gas/oil boilers can achieve over 92% thermal efficiency, being energy-saving and environmentally friendly. They are compact, shipped as packaged units for easy installation. The quality of the steam provided directly affects conditioning effect and pellet quality, making it the "heart" of feed production.
Specifications are indicated by evaporation capacity (tons/hour, t/h) and rated working pressure (MPa). Common specifications for feed mills range from 0.5 t/h to 4 t/h. Fuel types are diverse, including natural gas, diesel, biomass pellets, etc. Steam temperature corresponds to pressure; for example, saturated steam temperature at 0.8MPa is about 175°C. The boiler requires supporting water treatment equipment (softener) to prevent scaling.
The generated steam is mainly used for: 1) Conditioning powder before pelleting, to gelatinize starch and denature protein, improving pellet formation rate and durability, and enhancing digestibility; 2) The production process of extruders, providing necessary moisture and heat for material cooking; 3) Workshop heating if needed. It is an indispensable auxiliary equipment for pellet feed and extruded feed production lines.
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