In order to reduce the steam consumption of DTDC in the soybean pressing plant,the structure and operation of DTDC were adjusted,and the process technology of recovering the waste heat of DT layer hot air,DC hot air vent gas and the waste heat in the interlayer of DTDC were introduced.The DT gas phase temperature was adjusted from 72-75 ℃ to 68-70 ℃,the stirring fins were changed to bending type,and the rotary valves in each layer were equipped with inverter motors to make the materials in suspension;the DC hot air layer was equipped with one blower fitted with inverter motors in each layer,and the energy-saving layer was increased.Practice had proved that the finished soybean meal produced by the adjusted DTDC had golden yellow appearance with a strong aroma,and the residual solvent was 190-300 mg/kg,KOH protein solubility of the soybean meal was greater than 80％,and steam consumption of the DTDC was effectively reduced.
gas phase temperaturewaste heat recoveryresidual solvent in soybean mealKOH protein solubility
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