煤制天然气废水处理技术研究现状及展望

摘要

In order to realize the zero discharge of wastewater from coal to methane project,the primary wastewater treatment processes,such as phenol ammonia recovery,organic wastewater treatment,salt containing wastewater treatment,concentrated brine treatment,high concentration brine treatment,crystal salt treatment,and their characteristics were systematically summarized and analyzed.Finally,the development trend of zero discharge treatment technology was overviewed.In the future,the producing system and water supply system should be combined to optimize the process and to develop new approach for wastewater treatment and utilization.Such process can reduce wastewater and improve the recovery efficiency and stability of phenol ammonia recovery process,and even cut down operating costs.The anti-virus biochemical technology,high-performance anti-pollution film materials,high recovery rate and high purity salt crystallization process should be developed.The standard for coal chemical wastewater crystallization salt product should be formulated.%为实现煤制天然气项目的“废水零排放”,论述了煤制天然气“废水零排放”主要工艺,如酚氨回收、有机废水处理、含盐废水处理、浓盐水处理、高浓盐水处理、结晶盐处理等,并分析了各工序处理技术的特点及存在问题,并对煤制天然气及煤化工废水零排放处理发展趋势进行展望.未来应通过生产系统与水系统的优化,研究废水处理与利用的新途径,实现废水减量化;提高酚氨回收过程的回收效率及装置稳定性,降低运行成本;开发抗毒生化技术;研发高性能、抗污染膜材料,形成新工艺;开发经济、可靠的浓盐水脱除COD技术;开发高回收率、高纯度的分盐结晶工艺;形成煤化工废水结晶盐产品标准,促进废水结晶盐资源化利用.