（1） 600×104 m3/d evaporation crystallization plant for CNPC
The plant adopts multi-effective evaporation and condensation method to treat saline water. The produced water treated by evaporation crystallization unit is reused as make-up water for circulating cooling water, or as other production water in the plant. Pollutants are separated out from the sewage in the form of crystalline salt. The feed of evaporation crystallization plant is saline water from upstream electrodialysis plant, and the treatment capacity of the plant is 300 m3/d. The annual production time is 8,000 hours.
The multi-effective evaporation is adopted to realize the stepwise utilization of energy and the energy saving effect is obvious.
The waste heat of the whole system is fully utilized. The evaporation crystallization unit only needs a small amount of high-grade heat energy to realize zero discharge of sewage from natural gas purification plant.
The treatment effect is good, and the treated water can meet the standard of circulating water, so it can be used as make-up water for circulating water.
The heat exchange tube is made of titanium material with good heat transfer efficiency. Other main equipment adopts 316L composite plate, which has stable operation, high degree of automation, simple operation and wide application range.
(2) Natural gas purification plant supporting evaporative crystallization device
Client: Chuanzhong Gas Mine, CPECC Location of use: Moxi Purification Plant, Gaomo Purification Plant Rated flow rate: 300×104Nm3/d Construction start date: April 5th, 2014 Project site completion date: July 25th, 2014.
