Method for performing two-segment treatment on solid waste incineration fly ash with cement kiln

Abstract

The invention discloses a method for performing two-segment treatment on solid waste incineration fly ash with a cement kiln. Adopted devices include the cement kiln and a fly ash treatment device connected to the rear end of the cement kiln. The fly ash treatment device comprises a first segment of rotary steel cylinder and a second segment of rotary steel cylinder. The method includes the following steps that the fly ash and a second auxiliary material to be treated are added correspondingly from a fly ash inlet and a second auxiliary material inlet of the second segment of rotary steel cylinder; tail gas in a smoke chamber at the tail of the cement kiln or in a kiln door cover is sent into a tail gas inlet in the front end of the fly ash treatment device; a first auxiliary material is added from a first auxiliary material inlet of the first segment of rotary steel cylinder; and flue gas generated after the fly ash is treated in the fly ash treatment device is discharged out of an induced draft fan. A cement kiln thermodynamic system is adopted for the method, a cement kiln heat source is combined with solid waste incineration fly ash treatment, the heat energy of the cement kiln can be fully utilized, the fly ash can also be treated rapidly and safely with a low cost in a batched manner, and the fly ash treatment cost is greatly lowered.

Description

technical field [0001] The invention relates to the field of solid waste reuse, in particular to the treatment technology for cement kiln co-processing of solid waste incineration fly ash, specifically a two-stage treatment of solid waste incineration fly ash by using cement kiln and its tail gas method. Background technique [0002] With the development of social economy and the intensification of urbanization process, many large and medium-sized cities in my country have encountered multiple problems such as "garbage siege" and "sludge disposal". There are generally three methods of solid waste treatment: landfill, incineration and composting. At present, my country's solid waste treatment still adopts landfill as the main method, composting and incineration as supplementary measures, which will occupy a large amount of land resources. With the rise of land prices and the continuous improvement of urban environmental requirements, landfill has become uneconomical and safe...

AI Technical Summary

Problems solved by technology

However, due to the high chlorine content in fly ash, cement kiln co-processing generally uses water washing to remove chlorine in fly ash and then enters cement kiln for incineration. This technology is environmentally safe, but the disposal process is cumbersome, the disposal volume is small and the cost is high. higher

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