Coal-water slurry clean combustion organic working medium boiler

Abstract

The invention discloses an organic working medium boiler for coal-water slurry clean combustion. The organic working medium boiler for coal-water slurry clean combustion comprises an air distribution device, a combustion chamber dense-phase zone, a combustion chamber lean-phase zone, a coal-water slurry granulator, a vortex separation and burnout device and a tail convection heating surface component, wherein the dense-phase zone is of an inverted-trapezoid-shaped structure, and buried tubes are arranged in the reflux zone of the inverted-trapezoid-shaped structure; the combustion chamber lean-phase zone is provided with a square spiral coil tube water-cooling wall, and the upper outlet of a combustion chamber is provided with the vortex separation and burnout device. According to the organic working medium boiler for coal-water slurry clean combustion, the wear problem of the heating surface of the dense-phase zone and the easy coking problem of the interior of the organic working medium boiler for coal-water slurry atomizing combustion in a short and small space are solved; the combustion efficiency of the fuel is increased; the combustion mode belongs to low-temperature combustion, so that discharge for pollutants of NOx and the like can be effectively reduced; coal-water slurry is good in variety adaptability and a boiler load is good in regulation property; clean combustion for a coal-based fuel is realized; a new route is provided for energy conversion and emission reduction for industrial boilers.

Description

Technical field [0001] The invention relates to an industrial boiler, in particular to an organic working fluid boiler for clean combustion of coal water slurry. Background technique [0002] Coal water slurry is a low-polluting, high-efficiency, pipeline-transportable coal-based fluid fuel obtained through physical processing of approximately 70% coal, 29% water and 1% additives. It has changed the traditional way of burning coal, showing great environmental protection and energy saving advantages. With the guarantee of my country's abundant coal resources, coal water slurry has also become the most basic and most economical clean energy source to replace oil and natural gas. [0003] The organic working fluid boiler can obtain a higher working temperature at a lower operating pressure, and has the technical characteristics of low pressure and high temperature. Compared with steam heating, the organic working fluid has uniform heating, simple operation, safety and environmental p...

AI Technical Summary

Problems solved by technology

[0005] (1) The center temperature of the high-temperature combustion flame is above 1450°C, and it is easy to coke in a small-space combustion chamber;

[0006] (2) Poor ignition conditions and unstable combustion;

[0007] (3) The coal type of the boiler has poor adaptability, clean coal needs to be washed to make pulp, and the operating cost is high;

[0008] (4) The load adjustment range is small, and the combustion rate is likely to be low and greatly reduced at low load;

[0009] (5) It belongs to high-temperature combustion and high pollutant emission;

[0010] (6) The boiler slurry supply system is complex and the operating pressure is high, which is easy to cause wear of the slurry supply pump and slurry gun

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