CWS (Coal Water Slurry) hot water boiler system

Abstract

The invention relates to a CWS (Coal Water Slurry) hot water boiler system. The CWS hot water boiler system is characterized in that four corners of a combustion chamber are all provided with low nitrogen type combustors specially using CWS; refractory belts are additionally arranged at the peripheries of elevation sections of CWS spraying nozzles of the combustors; the lower ends of water walls stretch downwards to form an ash cooling hopper; the upper end of one water wall at the rear side of the combustion chamber stretches into and protrudes out of a furnace to form a furnace arch; the furnace arch stretches upwards to form two branches, one of the branches vertically and upwards enters a collection box, and a film type water wall is formed by the other branch so as to form an oblique furnace bottom of the bottom part of a horizontal flue; one water wall at the front side of the combustion chamber stretches backwards to form a rear roof tube. The CWS hot water boiler system disclosed by the invention has the following advantages that (1) CWS fuel is creatively used on a large-capacity hot water boiler; (2) ignition and stable combustion of the boiler during low load are ensured; (3) water circulation of the boiler is forced circulation, simplicity and reliability are obtained, the four water walls at the front side, the rear side, the left side and the right side of the combustion chamber are risen at one step, the temperature is uniform and reasonable, the temperature deviation is reduced, and the combustion stability is ensured.

Description

technical field [0001] The invention relates to a coal water slurry hot water boiler system. Background technique [0002] Conventional large-capacity hot water boilers in the prior art usually use coal or gas. Coal is the main heating energy source, and the environmental problems caused by it are becoming more and more serious. Although natural gas is a clean, high-quality, and efficient boiler fuel, it can effectively To solve the problem of environmental pollution caused by coal-fired boilers, but due to the limited natural gas resources in my country, the amount of natural gas used for heating is still greatly restricted, and the operating costs of natural gas-fired boilers are high. [0003] Coal water slurry is a new type of coal-based clean liquid fuel, which has similar storage, transportation and combustion characteristics to oil. Coal water slurry is a clean fuel and is listed as a national key clean energy project. It can meet the environmental protection requirem...

AI Technical Summary

Problems solved by technology

However, the current coal-water slurry-fired hot water boilers generally have a small capacity. Large-scale heating networks need to be equipped with multiple small-capacity boilers, and the load of the heating network is adjusted by starting and stopping multiple boilers. The load adjustment ability is poor; Unstable combustion, incomplete combustion, easy coking, low thermal efficiency and other phenomena are common.

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