System and method for preparing cement co-production sulfur by utilizing urban wastes and industrial solid wastes

Abstract

The invention discloses a system and a method for preparing cement co-production sulfur by utilizing urban wastes and industrial solid wastes. The system comprises a homogenizing tank, a filter press, a drier, a raw material mill unit, a rotary kiln, a cement mill, a hot water storage tank, a dust remover and a reduction fixed bed; red mud, wet sludge and industrial water enter the homogenizing tank to be homogenized and dealkalized, and then enter the filter press to be filter-pressed; a filter-pressed solid material enters the drier to be dried, the dried solid material together with desulfurization gypsum enters the raw material mill unit for raw powder ratio milling; a milled material enters the rotary kiln for high-temperature calcination to obtain a sulphoaluminate clinker; the sulphoaluminate clinker together with desulfurization gypsum enters the cement mill for mixed milling to obtain sulphoaluminate cement; hot water in the hot water storage tank provides heat for the homogenizing tank; sulfur dioxide-containing flue gas generated in the rotary kiln is subjected to dust removal through the dust remover and is conveyed to the reduction fixed bed for reduction to obtain the sulfur.

Description

technical field [0001] The invention relates to the fields of chemical industry, building material technology, comprehensive resource utilization of bulk industrial solid waste and urban sludge, and environmental protection treatment, and specifically relates to a system and method for preparing sulphoaluminate cement and co-producing sulfur by utilizing urban waste and industrial solid waste. Background technique [0002] Since the reform and opening up, with the rapid development of my country's industry and the acceleration of urbanization, a large number of various toxic and harmful industrial solid wastes have been produced, and the number is still rising. Bulk industrial solid waste, referred to as bulk solid waste, refers to the industrial solid waste that produces more than 10 million tons annually in the field of industrial production in my country and has a great impact on the environment and safety, mainly including red mud, desulfurized gypsum, smelting slag, and ...

AI Technical Summary

Problems solved by technology

In actual production, limestone decomposes at 850-900°C to produce CaO and CO 2 , CO 2 Escaping from waste, because sulphoaluminate cement clinker needs to use a large amount of limestone in the preparation process, it will release a large amount of CO 2 , greatly exacerbating the greenhouse effect of the environment

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