关键词: 煤化工废水, 零排放, 高密度沉淀池, 除硬

Abstract: With the development of society and economy, people’s awareness of environmental protection is becoming increasingly strong, and the standards for wastewater treatment in China’s coal chemical industry are increasingly stringent. In the coal chemical industry, hardness removal plays an important role in wastewater treatment. Taking the high-density sedimentation tank of certain coal chemical project as example, this paper discusses and analyzes hardness removal from coal chemical wastewater.

Key words: coal chemical wastewater, zero emission, high-density sedimentation tank, hardness removal