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Method for preheating the air circulating in an installation comprising an evaporator coupled to a drying unit

  • US 4,313,787 A
  • Filed: 07/23/1980
  • Issued: 02/02/1982
  • Est. Priority Date: 08/03/1979
  • Status: Expired due to Term
First Claim
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1. In a method for concentrating a liquid product into a powdered product wherein said liquid product is treated in a multi-stage evaporator system to form a condensed concentrate product and a condensate and said condensed concentrate product is subsequently dried with hot air to produce a powdered product, the improvement which comprises heating the condensates of said multi-stage evaporator by means of a fluid issuing from said evaporator system to form a hot condensate and bringing said hot condensate issuing from said evaporator system into indirect heat exchange with air to form said hot air, said hot air being used to dry said condensed concentrate product.

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