Heavy oil wastewater is the associated pollutants in the process of heavy oil exploitation and has the characteristics of high temperature and great quantity. For heavy oil wastewater reused to boilers is the best way. The technology of heavy oil wastewater reused to thermal recovery boiler mainly includes four aspects:the removal of oil and suspended solids, the removal of hardness, TDS and silica. In Xinjiang oilfield the produced water of heavy oil is silica-rich waters. In the process of recycling boile...