燃煤电厂末端废水处理是实现燃煤电厂各类废水近零排放的关键,而末端废水因水质复杂、浊度高、硬度高、盐分高、强腐蚀等特点,使得其处理难度大,高效处理与低成本投入难以两全。文章围绕实际案例对直接旁路烟气蒸发工艺、软化 + 纳滤分...燃煤电厂末端废水处理是实现燃煤电厂各类废水近零排放的关键,而末端废水因水质复杂、浊度高、硬度高、盐分高、强腐蚀等特点,使得其处理难度大,高效处理与低成本投入难以两全。文章围绕实际案例对直接旁路烟气蒸发工艺、软化 + 纳滤分盐 + 蒸发结晶工艺、热法浓缩 + 旁路烟气蒸发工艺三个方案进行了对比分析。最终综合技术与经济性因素,建议采用热法浓缩 + 旁路烟气蒸发工艺。Terminal wastewater treatment of coal-fired power plants is the key to achieving near-zero discharge of all kinds of wastewater from coal-fired power plants. The characteristics of terminal wastewater such as complex water quality, high turbidity, high hardness, high salinity and strong corrosion make it difficult to treat, and it is difficult to achieve both efficient treatment and low-cost input. In this paper, the direct bypass gas evaporation process, softening + nanofiltration salt + evaporation crystallization process, and thermal concentration + bypass gas evaporation process are compared and analyzed. Finally, considering the technical and economic factors, it is recommended to adopt the thermal concentration + bypass gas evaporation process.展开更多
文摘燃煤电厂末端废水处理是实现燃煤电厂各类废水近零排放的关键,而末端废水因水质复杂、浊度高、硬度高、盐分高、强腐蚀等特点,使得其处理难度大,高效处理与低成本投入难以两全。文章围绕实际案例对直接旁路烟气蒸发工艺、软化 + 纳滤分盐 + 蒸发结晶工艺、热法浓缩 + 旁路烟气蒸发工艺三个方案进行了对比分析。最终综合技术与经济性因素,建议采用热法浓缩 + 旁路烟气蒸发工艺。Terminal wastewater treatment of coal-fired power plants is the key to achieving near-zero discharge of all kinds of wastewater from coal-fired power plants. The characteristics of terminal wastewater such as complex water quality, high turbidity, high hardness, high salinity and strong corrosion make it difficult to treat, and it is difficult to achieve both efficient treatment and low-cost input. In this paper, the direct bypass gas evaporation process, softening + nanofiltration salt + evaporation crystallization process, and thermal concentration + bypass gas evaporation process are compared and analyzed. Finally, considering the technical and economic factors, it is recommended to adopt the thermal concentration + bypass gas evaporation process.
