High-temperature and ultrahigh-pressure reheat steam boiler of biomass direct combination energy-conservation circulating fluidized bed

Abstract

The invention discloses a high-temperature and ultrahigh-pressure reheat steam boiler of a biomass direct combination energy-conservation circulating fluidized bed, relates to the high-temperature andultrahigh-pressure reheat steam boiler, in particular to the high-temperature and ultrahigh-pressure reheat steam boiler of the biomass direct combination energy-conservation circulating fluidized bed, and solves the problems of difficult direct combustion of yellow straw biomasses, shorter continuous operation time, low boiler unit efficiency, more pollution discharge, blocked feeding, weak reliability, higher boiler failure rate and difficult biomass formation. A biomass direct combustion system is mounted at the lower part of a hearth; the upper part of the hearth is connected with the upper part of a separation and return system; the lower part of the hearth is connected with the lower part of the separation and return system; a smoke inlet of a first tail flue is connected with the upper part of the separation and return system; and the lower part of the first tail flue is connected with the lower part of a second tail flue through a connecting flue. The high-temperature and ultrahigh-pressure reheat steam boiler of the biomass direct combination energy-conservation circulating fluidized bed belongs to the field of power generation and combined heat and power generation.

Description

technical field [0001] The invention relates to a high-temperature, ultra-high-pressure reheating steam boiler, in particular to a biomass direct combustion energy-saving circulating fluidized bed high-temperature, ultra-high-pressure reheating steam boiler, which belongs to the field of power generation and combined heat and power generation. Background technique [0002] The existing biomass circulating fluidized bed boiler is difficult to directly burn the yellow straw biomass, the continuous operation time is short, the efficiency of the boiler unit is low, the pollution is high, the feeding is not smooth, and the reliability is poor, resulting in a high failure rate of the boiler. Contents of the invention [0003] The present invention solves the difficulty of directly burning yellow straw biomass in the existing biomass circulating fluidized bed boiler, the continuous operation time is short, the efficiency of the boiler unit is low, the pollution discharge is high, ...

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Problems solved by technology

[0003] The present invention solves the difficulty of directly burning yellow straw biomass in the existing biomass circulating fluidized bed boiler, the continuous operation time is short, the efficiency of the boiler unit is low, the pollution discharge is high, the feeding is not smooth, and the reliability is poor, resulting in a high failure rate of the boiler , the difficult problem of biomass molding, and then propose a biomass direct combustion energy-saving circulating fluidized bed high temperature and ultra high pressure reheating steam boiler

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