Power plant water treatment can be differentiated based on the installed capacity of the unit and water quality requirements. Most can be divided into four important processes. The first step is to carry out primary treatment of water taken from rivers by natural or mechanical sedimentation, physical adsorption and other processes. The main equipment includes mechanical stirring filters, mechanical suspension filters, activated carbon filters, etc. The second stage is reverse osmosis, ultrafiltration, seawater desalination, forward osmosis and other processes to reduce ion content, conductivity, etc. The third stage is ion exchange treatment to further reduce the content of various ions in the water, and the water quality reaches the pure water index, mainly anion and cation exchangers, mixed ion exchangers,etc.
The fourth step is to add a mixed ion exchanger into the furnace mainly to purify the water quality in the furnace. Generally, small units may not have it.