Assembled circulating fluidized bed heat carrier boiler

Abstract

An assembled circulating fluidized bed heat carrier boiler comprises three sets of devices including a circulating fluidized bed combustion hearth without a heating surface, a separator and a heat exchanger provided with heating surfaces, wherein high-temperature smoke output of the circulating fluidized bed combustion hearth without the heating surface is connected and communicated with the separator, and separated clean high-temperature smoke output by the separator is connected and communicated with the heat exchanger with the heating surface. For the assembled circulating fluidized bed heat carrier boiler, the combustion efficiency is high, the applicability of coal types is wide, the loss of latent heat is avoided, the temperature of a heat carrier is high, the control is precise, and the abrasion of a booster caused by the heating surface can be avoided, thereby being safe and reliable.

Description

technical field [0001] The invention relates to the technical field of boilers, in particular to an assembled circulating fluidized bed heat carrier boiler. Background technique [0002] The circulating fluidized bed boiler has high combustion efficiency, which can reach more than 98%, which is more than 20% higher than the existing layer combustion boiler thermal efficiency, and the coal type has wide adaptability. Whether it is bituminous coal, anthracite or coal gangue, it can use. The existing layer-firing boilers can only use high-quality bituminous coal. But the biggest problem of circulating fluidized bed is the wear of heating surface. In the combustion chamber and hearth of the furnace, the heating surface of ordinary steam boilers is as short as one year, and as long as three to five years. It is a way to stop the furnace for repair, but it will not cause a safety accident. If the heat carrier boiler also adopts a common circulating fluidized bed structure, the...

AI Technical Summary

Problems solved by technology

So at present, coal-fired heat carrier boilers generally adopt layer combustion forms such as hand-fired furnaces and reciprocating furnaces, and do not use circulating fluidized combustion structures that use fluidized combustion.

Images