Constant volume type clean coal combustion device

Abstract

The invention relates to a constant volume type clean coal combustion device. The constant volume type clean coal combustion device mainly comprises a furnace inner wall, a furnace grate and a spring, wherein a cavity of the furnace inner wall is divided into an upper part and a lower part by the furnace grate, a pressure equalizing chamber is formed in the cavity below the furnace grate, a coal fired layer and a combustion chamber are arranged and formed in the cavity above the furnace grate from bottom to top, the bottom surface of the combustion chamber coincides with the top surface of the coal fired layer, the elastic coefficient of the spring is the product of the spontaneous stacking density of coal and the top surface area of the coal fired layer, the vertical central axis of the furnace grate is collinear with the central axis of the spring, the horizontal clearance between the side wall of the furnace grate and the side wall of the furnace inner wall is less than one half of the thickness of the furnace grate, in a coal combustion process, the furnace grate is lifted by the spring and moves upwards together with the coal fired layer, and the position of the top surface of the coal fired layer is relatively fixed. The constant volume type clean coal combustion device can be used by an industrial furnace, an industrial boiler or a rural coal fired stove which burns low ash coal, clean coal or biomass fuel. The constant volume type clean coal combustion device has the advantages of simple structure and low investment, the combustion efficiency is greater than 95%, the energy saving rate reaches 5% to 15%, and the emission of flue gas pollutants is lower than the comprehensive emission level of air pollutants.

Description

technical field [0001] The invention relates to a constant-volume cleaning method based on the principles of relatively fixed position of the combustion surface and constant heat intensity of the volume of the combustion chamber by burning loose or briquette-like low-ash clean coal, low-ash coal or low-ash biomass fuel. Coal combustion device, especially suitable for the field of coal and clean coal combustion, industrial furnaces, industrial boilers and rural domestic coal-fired stoves. Background technique [0002] Industrial combustion heating and rural domestic heating produce a large amount of dust, carbon black and carbon monoxide gas, which is one of the important reasons for the current smog. According to statistics, in 2013, the total consumption of raw coal in my country reached 4.2 billion tons, of which about 20% of the raw coal was consumed in combustion and heating sites, emitting CO 2 About 2.1 billion tons, about 50 million tons of dust. Assuming that 50% o...

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Problems solved by technology

[0005] In order to overcome the problems that the position of the coal combustion surface of the fixed grate type coal stove decreases, resulting in an increase in the volume of the combustion chamber, a decrease in the thermal intensity of the volume of the combustion chamber, heat loss from incomplete combustion of coal, and an increase in the emission of flue gas pollutants, the present invention designs a Structural features of "spring jacking up furnace bars to fix the position of the top surface of the coal-fired seam", technical features of "constant thermal intensity of combustion chamber volume", "good controllability of coal combustion process, high coal combustion efficiency and energy efficiency, and smoke carbon black Constant-capacity clean coal combustion device with technical advantages such as meeting the emission standards of carbon monoxide and carbon monoxide

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