Method for improving power plant raw water utilization rate

• Main Authors: JIAO HAIPING, GAO ZEYONG, YANG XUEMEI, MA YONGHUI, LIANG XIAOLONG, XIAO SHUFANG, XI FANG, CHENG JUN
• Format: Patent
• Language: English
• Published: 16.09.2015
• Subjects: CHEMISTRY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention relates to a method for improving power plant raw water utilization rate. The method includes the following steps in order: 1. conducting rough filtration on raw water by a two-media filter; 2. performing fine filtration on the clear water filtered by step 1 by an ultrafiltration device; 3. adjusting the PH value and temperature of the finely filtered clear water in step 2, and adding a reverse osmosis scale inhibitor; 4. carrying out pre-desalination treatment on the clear water generated in step 3 by a reverse osmosis device; and 5. letting the fresh water generated by step 4 enter ion exchange equipment to conduct desalination so as to obtain desalted water. Under the premise of guaranteeing boiler water quality, the method provided by the invention substantially reduces the raw water consumption, greatly decreases wastewater discharge, and also significantly lowers the water making cost.