Method for sulfur fixation temperature control burning of coal gangue and efficient coupling and utilizing of lime ash

Abstract

The invention discloses a method for sulfur fixation temperature control burning of coal gangue and efficient coupling and utilizing of lime ash, belongs to the technical field of resource utilization of solid wastes and provides the method for the sulfur fixation temperature control burning of the coal gangue and efficient coupling and utilizing of the lime ash. By using the technology, a circulating fluidized bedboiler can operate safely, stably and reliably, and efficient, automatic and accurate coal blending is realized under the condition of storing coal on a large scale; meanwhile, fly ash is utilized on a large scale. The method comprises the following steps of a, screening and crushing low-grade fuel; b, screening crushed fuel for mixing; c, intelligently controlling the mixed fuel to burn; d, after burning, performing temperature control cooling on the burnt lime ash; e, performing superfine grinding on cooled fly ash. The method disclosed by the invention is mainly applied to temperature control burning of the circulating fluidized bedboiler and efficient utilization of the lime ash.

Description

technical field [0001] The invention discloses a method for efficient coupled utilization of coal gangue sulfur-fixed combustion under temperature control and ash, and belongs to the technical field of solid waste resource utilization. Background technique [0002] In the prior art, the structure of the coal-fired supply system for circulating fluidized bed boilers is the same as that of pulverized coal furnaces: it mainly relies on automobile transportation to purchase nearby low-quality coal, and then mixes some coal gangue into the boiler unit after simple treatment and buffering. Due to the miscellaneous coal source, the coal quality fluctuates greatly, the calorific value stability is poor, and there are often super-grain phenomena, which reduces the boiler efficiency and is not conducive to the normal and stable production of the power plant. [0003] Some enterprises send coal from outside to the coal yard, and then use multiple loaders to stack and blend coal, and th...

AI Technical Summary

Problems solved by technology

However, this equipment is for high-quality coal, and it is a multi-barrel equipment. The cost of the system is high, and the fixed investment is large, so it is not suitable for low-quality coal systems.

[0006] As the inferior coal raw materials become worse and worse, and there are more large pieces of mixed gangue and hard rock, the existing raw material processing system only has a first-level coarse crushing, resulting in too much pressure on the equipment, frequent failures, low work efficiency, and high energy consumption. The loader operates frequently, and there are hidden dangers in safety, and when dealing with failures, the system cannot load materials, which causes material tension in the coal storage yard and affects the operation safety of the unit

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