Question

Immediate help needed balancing equations!

A feed of 10, 000 kg/day of soybeans is processed in a sequence of three stages or units. The beans contains 35 wt percentage protein, 27.1 wt Percentage carbohydrate, 9.4 wt Percentage fiber and ash, 10.5 wt Percentage water, and 18 wt Percentage oil. In the first unit, the beans are crushed and pressed to remove oil, resulting in a stream of pure oil and a stream of pressed beans (beans still contain 6 wt Percentage oil). In the second unit, the beans are extracted (or mixed) with a stream of hexane (2,000 kg/day). This process results in an extracted-meal stream (meal contains 0.5 wt Percentage oil) and a hexane-oil stream. Assume no hexane in the extracted-meal stream. Finally, in the last unit, the extracted meal is dried to give a dried meal with only 8 wt Percentage water. The rest of the water leaves in a vapor stream. Assume only vapor in this stream. Draw and completely label a flowchart for this system. Solve for unknown stream amounts and compositions.

Answer 1

10,000 kg /day of soybean 10.5 . Wt water 18 art % oil - 12 % oil downarrow crushing & pressing soybean 6 wt % oil 10.5 5 water - 5.5 % oil downarrow mixing with hexane (2000 kg/play) meal 0. 5% oil, 10.5 % water - 2.5 % water downarrow drying meal 0.5 % oil 8 % water - 8 % water downarrow vapour stream 0.5 %, 0 % water