METHOD FOR OPERATING MULTIPLE-EFFECT FRESH WATER GENERATOR

• Main Authors: NAKATANI IKUO, YANAKA YUKICHI
• Format: Patent
• Language: English
• Published: 14.10.1988
• Subjects: CHEMISTRY; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

PURPOSE:To operate the title generator under stable temp. conditions by separately setting the temp. of steam to be supplied to a seawater heater provided in a seawater line extending from a preheater to an evaporator and the temp. of steam to be supplied to the first stage. CONSTITUTION:The multiple-effect evaporator device is formed with a multiple- effect evaporator obtained by vertically placing unit stage consisting of an evaporator 1 and a preheater 2 on one another in >=5 stages and a condenser 3 for condensing the steam from the terminal stage. When the device is operated, the temp. of steam to be supplied to the seawater heater 4 provided to the seawater line extending from the preheater 2 to the evaporator 1 and the temp. of steam to be supplied to the first stage are separately set, and the overall heat balance is kept constant. As a result, the device can always be operated under stable temp. conditions, and the device can be operated at 100% capacity at all times.