Semi-coke mixed burning system and semi-coke mixed burning method for industrial coal-burning layer burning furnace

Abstract

The invention discloses a semi-coke mixed burning system and a semi-coke mixed burning method for an industrial coal-burning layer burning furnace. The system includes a furnace, a tilt reciprocatingfurnace grate, a chain furnace grate, a coal feeder, a circulating fan, an air blower, a dust remover, an air induced fan, a chimney and a tail flue way and the like. According to the semi-coke mixedburning system, the coal is burned by using the tilt reciprocating furnace grate so as to form the bottom fire in view of the problems of low semi-coke volatile fraction, difficult firing and stable burning, low combustion efficiency in the burning process of the burning furnace, and high NOx generation amount, the semi-coke is paved on the chain furnace grate to form a mixed burning method of lower coal and upper coke so that the two sides of the semi-coke is heated, the proper combustion environment is provided for the semi-coke which has difficult in burning, a re-combustion zone with the reduced atmosphere is formed by carrying the fine powder semi-coke through low-temperature circulating fume in the furnace, meanwhile, the burning exhaust vent spout is formed in the upper portion of the re-combustion zone, and the energy utilization efficiency is improved and the NOx emission is reduced while the semi-coke burning optimization is achieved.

Description

technical field [0001] The invention relates to a system and method for blending and burning semi-coke in an industrial coal-fired seam furnace. Background technique [0002] Semi-coke, also known as semi-coke, is a solid carbon product with low volatile content obtained by dry distillation and pyrolysis of non-caking or weakly cohesive high-volatile bituminous coal under medium and low temperature conditions. Low-rank coal pyrolysis will produce more than 50% semi-coke products, so the large-scale utilization of semi-coke products can promote the development of low-rank coal pyrolysis technology, thereby achieving better economic effects. Semi-coke has high fixed carbon, high calorific value, high chemical activity, low sulfur content, low volatile matter, and low ash content. It can be used to make activated carbon, blast furnace injection fuel, gasification combustion, and reducing agent carrier. However, due to the physical and chemical properties of semi-coke, it has p...

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Problems solved by technology

However, due to the physical and chemical properties of semi-coke, it has problems such as high ignition temperature and difficulty in burning out when burning semi-coke, so there are certain difficulties in burning and utilizing semi-coke.

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