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1. (WO2018218573) SYSTEM FOR RECOVERING DRAIN OF POWER PLANT TO DE-AERATOR

Pub. No.:    WO/2018/218573    International Application No.:    PCT/CN2017/086775
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Fri Jun 02 01:59:59 CEST 2017
IPC: F22D 1/50
Applicants: SHENZHEN ENERGY ENVIRONMENTAL ENGINEERING CO., LTD
深圳市能源环保有限公司
Inventors: DENG, Jun
邓军
Title: SYSTEM FOR RECOVERING DRAIN OF POWER PLANT TO DE-AERATOR
Abstract:
Provided is a system for recovering the drain of a power plant to a de-aerator, the system comprising a de-aerator (11) and a desalinated water pipeline inlet system, a condensed water pipeline inlet system and a drain pipeline inlet system which are connected into the de-aerator (11), and further comprising an outlet system from the de-aerator (11) to a water feed pump, characterized in that the drain pipeline inlet system is arranged before a pneumatic regulating valve (6); an outlet of the drain pipeline inlet system is connected behind a desalinated water inlet check valve (3) and before a front check valve (5) of the pneumatic regulating valve; and the flow, when a drain pump and a desalinated water pump supplement water to the de-aerator (11), is required to be automatically controlled by the pneumatic regulating valve (6) and the water level of the de-aerator (11) is required to be maintained in a set range, and both of the drain pump and the desalinated water pump operate in a chained manner, that is, the desalinated water pump is stopped automatically when the drain pump is started, and the desalinated water pump is started automatically when the drain pump is stopped. As water is continuously supplemented to the de-aerator (11), the stability of both the pressure and temperature of the de-aerator (11) can be effectively guaranteed, and normal operation of the system can be guaranteed.