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25 April, 07:21

Evaporation of Cane Sugar Solutions. An evaporator is used to concentrate cane sugar solutions. A feed of 10 000 kg/d of a solution containing 38 wt % sugar is evaporated, producing a 74 wt % solution. Calculate the weight of solution produced and amount of water removed.

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  1. 25 April, 07:45
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    Weight of solution produced = 5135 kg

    Amount of water removed = 4865 kg

    Explanation:

    For the balance of mass, the incoming mass of sugar must be equal to the outgoing mass. So, the incoming mass (mi) is 38% of 10000 kg

    mi = 0.38x10000 = 3800 kg

    The outgoing mass (mo) must be 3800 kg, and it is 74% of the total mass (mt)

    mo = 0.74xmt

    0.74xmt = 3800

    mt = 3800/0.74

    mt = 5135 kg

    This is the mass of solution produced.

    The amount of water removed (wr) is the amount of water incoming (wi) less the amount of water outgoing (wo). Both will be the total mass less the mass of sugar:

    wi = 10000 - 3800 = 6200 kg

    wo = 5135 - 3800 = 1335 kg

    wr = wi - wo

    wr = 6200 - 1335

    wr = 4865 kg
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