Technology and system for removing dust and sulfur by using coal ash

Abstract

The invention discloses a technology for removing dust and sulfur by using coal ash. The technology mainly comprises the following steps: (1) leading flue gas with the coal ash, which is generated after burning, into a cyclone dust collector, wherein the coal ash mainly comprises glass bead bodies, spongy porous particles and calcium oxide powder; (2) separating the glass bead bodies and the spongy porous particles adsorbing SO2, which are contained in the flue gas, from the flue gas by using the cyclone dust collector; and (3) feeding the flue gas sent out from the cyclone dust collector into a desulfurizing tower, so that the flue gas and a water circulating liquid containing a surface active agent are subjected to physical and chemical reactions so as to realize the removal of sulfur in the flue gas. The system for removing dust and sulfur by using coal ash comprises the cyclone dust collector, the desulfurizing tower and a circulating pool. The removal of sulfur in the flue gas is realized by using activating oxides contained in the flue gas through the related physical and chemical reactions, so that the up-to-standard release of the treated clean flue gas is realized. The whole technological process is concise, extremely reasonable and optimal; and the desulfurized coal ash can be reused, so that the comprehensive cyclic utilization of the coal ash is realized, and the utility value of the coal ash is fully exerted.

Description

technical field [0001] The invention relates to the technical field of flue gas desulfurization of pulverized coal combustion, and specifically refers to a dust removal and desulfurization process using fly ash and a system thereof, which are suitable for desulfurization of sulfur dioxide in flue gas of small and medium-sized industrial pulverized coal boilers. Background technique [0002] Pulverized coal industrial boiler is a new type of furnace developed in my country in recent years, and fly ash is the main solid waste discharged from pulverized coal industrial boiler. With the continuous development of industry, the technology of pulverized coal industrial boilers has been continuously matured, and has the advantages of fast start-up, wide load adjustment range, high degree of automation and low energy consumption, and has been put into use in industrial and civil fields more and more. How to deal with the fly ash produced after combustion and how to achieve effective ...

AI Technical Summary

Problems solved by technology

How to deal with the fly ash produced after combustion and how to achieve effective comprehensive recycling is extremely critical in industrial production. At present, fly ash is mainly used as an admixture for concrete and in the field of red brick production. In the field of processing and comprehensive recycling There has been no good solution

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