Structural component of heating surface on tail part of fired coal-water-slurry boiler

Abstract

The invention discloses a structural component of a heating surface on a tail part of a fired coal-water-slurry boiler. The structural component comprises a convection tube bundle component arranged on the tail part of a boiler body and an ash falling device arranged on the bottom part of the boiler body, wherein the convection tube bundle component comprises a plurality of convection tube bundle areas; a smoke isolating wall is arranged between each two adjacent convection tube bundle areas; two adjacent smoke isolating walls are arranged in an intersection manner; thus, smoke enters each convection tube bundle area in sequence so as to exchange heat; a plurality of tube panels are arranged in each convection tube bundle area in parallel; a distance between each two adjacent tube panels is less than 90mm; the convection tube bundle component is divided into a plurality of areas by smoke isolating walls; thus, the direction of the smoke is changed, the disturbance of the smoke in the boiler body is enhanced, heat exchange between the smoke and organic heat carriers in tubes is enhanced; and meanwhile, sedimentation of fly ash is accelerated, the distance between two adjacent tube panels in each convection tube bundle area is less than 90mm, thus, a circulating cross section of the smoke can be reduced, and the smoke flowing speed is increased, so that the fly ash of the smoke is difficult to adhere to the tubes.

Description

technical field [0001] The invention relates to an industrial boiler, in particular to a structural component of the heating surface at the tail of a coal-water slurry organic heat carrier boiler. Background technique [0002] A coal water slurry boiler refers to a boiler that uses coal water slurry as fuel. Coal water slurry is a liquid prepared by mixing about 70% coal powder, about 30% water and a small amount of chemicals. It can be pumped, atomized, stored and transported like oil, and can be directly used in various boilers , The combustion of the kiln. It has changed the traditional way of burning coal, showing great advantages in environmental protection and energy saving. Especially in recent years, after adopting the technical route of recycling waste, the environmentally friendly coal-water slurry has been successfully developed, which can greatly improve the environmental protection benefits of coal-water slurry without increasing costs. Under the protection o...

AI Technical Summary

Problems solved by technology

Boiler ash and slagging is a common problem, which has a great impact on the economy and safety of boiler operation

The hazards of ash accumulation on the heating surface of the boiler: 1. The heat transfer efficiency of the heating surface is low, and the overall use efficiency of the furnace decreases. times, so the ash accumulation in the boiler will seriously affect the heat conduction in the heating surface. The consequence of the decrease in the heat exchange efficiency of the boiler is that the temperature of the flue gas will rise, which will lead to more serious high temperature ash accumulation and large-scale coking, forcing the boiler load capacity 2. Due to improper ash removal measures or the limitations of the ash removal technology itself, the ash accumulation on the heating surface of the boiler will inevitably increase with the prolongation of the start-up period of the boiler. The aggravation will inevitably affect the stable operation of the heating furnace in the later stage. When the ash accumulation and slagging are serious, the coking block formed by it will be larger in size and heavier in weight. and other vicious events

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