| 摘要 |
PURPOSE:To reduce installation cost, by using a mechanical steam compression type distillation apparatus as a primary pure water system while using a reverse osmosis membrane apparatus as a secondary pure water system. CONSTITUTION:Raw water having received pretreatment is supplied to the upper liquid chamber 26 of an evaporator 30 after preheated by a heat exchanger 41 and a part of the preheated raw water is heated while flowed down through flow-down pipelines 28 and evaporated. Steam passes through a gas-water separator 31 to be raised in pressure by a compressor 33 and sent to a condensation chamber 29 where imparts heat to raw water flowed down through the flow-down pipelines 28 to be condensed to obtain primary pure water. This distilled water is sent to the heat exchanger 41 to impart heat to raw water and sent to a secondary pure water system 24 and further raised in purity to obtain secondary pure water. The residual water separated by a reverse osmosis membrane module 43 is also returned to a supply pipe 34 as raw water. |
