生活垃圾协同处置含水污泥掺烧方式的探讨

Discussion on Blended Incineration of Domestic Refuse and Watery Sludge in Synergistic Disposal

生活垃圾焚烧协同处置含水污泥是实现污泥“减量化、稳定化、资源化、无害化”的有效手段。本文介绍了不同含水率污泥的理化性质,以及目前含水率80%和40%两种污泥的主要掺烧方式,分析各种掺烧方式的利弊,并结合实际案例针对掺烧方式存在的问题给出了解决方案。含水率80%污泥的掺烧方式主要包括污泥送焚烧炉给料斗掺烧和污泥送焚烧炉内直喷掺烧。前者实践中存在的问题是污泥送入给料斗内为圆柱状,无法烧透,需要改进优化污泥喷嘴;后者存在影响焚烧炉稳定运行等问题和风险,但工艺简单、投资少,是未来的研究方向。含水率40%污泥的掺烧方式有多种,如污泥送垃圾坑内和垃圾搅拌掺烧、污泥送垃圾进料斗掺烧、污泥送推料平台掺烧、污泥送炉膛侧墙掺烧等,各有利弊,实际应用中通常将多种掺烧方式协同采用,充分发挥多种常见掺烧方式的可靠性和灵活性,运行可靠。

The synergistic disposal of burning sludge along with domestic refuse is an effective method to achieve the “reduction, stabilization, reutilization and harmlessness” of sludge. This paper introduced the physical and chemical properties of sludge with different water contents and the main blended incineration method of sludge with 80% and 40% water contents, analyzed the advantages and disadvantages of various blended incineration methods, and provided some solutions to the problems of blended incineration in light of actual cases.The mixing and burning methods of sludge with a moisture content of 80% mainly include sending the sludge to the incinerator for mixing and burning in the hopper and sending the sludge to the incinerator for direct injection mixing and burning. The problem of the former in practice is that the sludge sent into the feed hopper is cylindrical and cannot be burned through, so it is necessary to improve and optimize the sludge nozzle;The latter has problems and risks that affect the stable operation of incinerator, but the process is simple and the investment is small, which is the future research direction. There are many ways to mix and burn the sludge with a moisture content of 40%, such as sending the sludge to the garbage pit and mixing and burning the garbage, sending the sludge to the garbage feed hopper for mixing and burning, sending the sludge to the pusher platform for mixing and burning, and sending the sludge to the furnace side wall for mixing and burning, each of which has its advantages and disadvantages. In practical application, a variety of mixing and burning methods are usually used cooperatively, which can give full play to the reliability and flexibility of these common mixing and burning methods and ensure reliable operation.