The Iapplication And Research Of The Whole Membrane Method In The Boiler Make-Up Water Treatment System Of Thermal Power Plant

This topic for Jiangsu Huadian Qishuyan 2 * 220 MW combustion engine cogeneration project of boiler make-up water treatment of membrane technology used in the system. China Huadian Engineering(Group) Limited company to undertake the project, according to the water quality characteristics of the design and manufacture of the whole system using ultrafiltration(UF) and reverse osmosis, EDI membrane process for preparing high purity water. Jiangsu Huadian Qishuyan Thermal Power Co., Ltd.(original in Qishuyan power plant) is located in the east of Changzhou City,Jiangsu Province, about 8km, plant water since the Beijing Hangzhou Grand Canal Qi Shu plant canal water. The raw water by mixing anti sedimentation tank and air scrubbing filter after the effluent turbidity is less than 3NTU, the chlorine is about0.2mg/L. Because of the lower organic pollutants in the runoff, the salt content is not high, suspended solids content of unstable and higher peak, design the clarifier and mechanical filtration and ultrafiltration as raw water pre treatment, two stage reverse osmosis pre desalination. Finally, using EDI were refined desalination of membrane technology to produce to meet the requirements of the boiler feed water of high purity water.Design of boiler feed water output 200m3 / h, producing water according to the high pressure boiler water supply specification, conductivity less than or equal to 0.2? s / cm, Si O2 concentration is less than or equal to 20 ? g / L.The boiler make-up water treatment system is stable and the water quality is good,which can meet the requirements of the boiler water.Through the application of the research results, it can solve the problem of the demand for high quality boiler supply water, and ensure the boiler supply water treatment system to run stably and ensure the water quality of the boiler is excellent,and fully meet the requirements of the boiler water. At the same time, it provides an example for the similar power plant boiler supply water to consider using the whole film method.