ENERGY SAVING IN THE SOYBEAN EXTRACTION INDUSTRY BY REDUCING THE STEAM CONSUMPTION FOR DESOLVENTIZING - TOASTING AND DRYING EXTRACTED BEANS
An investigation has been made into the possibility to reduce the steam consumption in the soybean extraction process, by the following modifications: a. Combining the toasting operation with the heat conditioning step and utilizing waste combustion gases for preheating; b. desolventizing the defatted flakes by means of indirect heating and a minimum amount of live steam, resulting in soybean meal of low water content which will hardly need additional heat for drying. In this context the optimal specific energy consumption of the operations concerned has been assessed. Besides, toasting experiments have been carried out with a semi- technical toaster. It appeared possible to toast soybeans in a relatively dry condition without deteriorating the protein and oil quality. However, it was found that toasting had an adverse effect on the extractability of the beans. A prudent conclusion is that by applying the new process about 40 kg of steam per ton of beans can be saved, as compared with the present state of the art. For an extraction plant with a capacity of 1000 TPD, the necessary investments to implement the new process are estimated at Hfl 800,000. The Payback Period PBP is 3.4 years, and the Rate of Return ROR is 28 %.
Bibliographic Reference: EUR 9338 EN (1984) MF, 40 P., BFR 120, BLOW-UP COPY BFR 200, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
Record Number: 1989122091000 / Last updated on: 1987-01-01
Available languages: en