The engineering project jointly built by our company and Wuhai Zhemenghai Thermal Power Co., Ltd. was implemented in Ningxia. Combining the project site planning and investment budget, a boiler water make-up water system with a scale of 2×220t/h was built. The industrial tap water introduced into the park first flows through the self-cleaning filter and ultrafiltration device to complete the pretreatment. Subsequently, it is desalinated with the help of the primary RO device and the secondary RO device. The desalinated water body enters the mixed bed for further fine treatment, and the treated water quality fully meets the boiler water standard. Through scientific design, this system effectively extends the regeneration cycle of the mixed bed, significantly reduces the use of acid and alkali, and reduces sewage discharge. At the same time, the system innovatively adopts the in-situ recovery and reduction process, which greatly improves the recycling rate of water resources and achieves a win-win situation of economic and environmental benefits.