| 摘要 |
PURPOSE:To keep the concentration of a liquid product constant, to raise its viscosity, and to prevent liquid separation during storage, by heating tomato material with steam directly in the presence of an acid, jetting it to low-pressure atmosphere. CONSTITUTION:A tomato material is fed, stored in the storage tank 2, the liquid is sent through a transporting pipe by a pump, an acid solution is added from the tank 3 to the pipe, the solution is adjusted to a proper pH, and, if necessary, other additive is fed from the tank 4 to it. They are blended by the mixer 5, preheated by the heat exchanger 6, and heated by superheated steam fed by the steam feeder 7. The heated material is jetted to the tank 9 in a low-pressure atmosphere, water in an amount corresponding to the steam amount is evaporated, and simultaneously the temperature of the product is lowered approximately to the preheating temperature. When the temperature of the product in the evaporating tank 9 is different from temperature to pack it into a container or it is further processed, it is sent from the evaporating tank 9 by a pump, and the temperature of the product is regulated by the heat exchanger 10. The product is transported from 11. |
