Micro oxygen rich combustion W flame boiler and CO2 emission reduction system

Abstract

The invention discloses a micro oxygen rich combustion W flame boiler and a CO2 emission reduction system, which is characterized in that anthracite or low-volatile coal is introduced in the W flame boiler furnace for fully combusting, the formed flue gas is divided into two strands through a heat exchange zone and a gas-gas heat exchanger after cooling, one strand is taken as a recycling flue gas; air and oxygen are simultaneously heated in the gas-gas heat exchanger, the heated air is divided into three strands, oxygen is divided into two strands, a first strand of oxygen and a first strand of air are mixed and introduced in a furnace arch primary air pipeline, a second strand of oxygen and a second strand of air are mixed and introduced in a furnace arch secondary air pipeline, and a third air is introduced in a back and forth wall secondary air pipeline. The invention combines the micro oxygen rich combustion technology and the W flame boiler, the desulphurization, denitration and capture with lower cost can be realized, and zero discharge can be realized. The pure oxygen amount required by fuel combustion with unit mass under a micro oxygen rich combustion mode is obviously reduced by comparing with oxygen rich combustion, and energy consumption and cost of air separation oxygen preparation can be greatly reduced.

Description

technical field [0001] The invention relates to a micro-oxygen-enriched combustion W flame boiler and a CO 2 Emission reduction systems, especially involving micro-oxygen-enriched combustion and W-flame boilers with anthracite or low-volatile coal as the main fuel and CO 2 An emission reduction system belongs to the technical field of boiler design. Background technique [0002] CO in coal-based electricity production 2 Emissions of CO from all human activities 2 About 25% of total emissions are CO 2 Largest single point source of emissions. CO in the exhaust gas of air-supported combustion of conventional pulverized coal boiler 2 The concentration is only 13% to 15%, which gives CO 2 The separation and capture of these materials bring great technical and economical problems. Oxygen-enriched combustion technology, also known as O 2 / CO 2 Combustion technology for organizing pulverized coal in O 2 and CO 2 Combustion in the mixed gas can greatly improve the CO in e...

AI Technical Summary

Problems solved by technology

[0005] At present, although a lot of scientific research and experiments have been carried out on oxygen-enriched combustion technology, most of the relevant researches are on conventional coal such as bituminous coal, while the research on the combustion of anthracite or low-volatile coal by oxygen-enriched technology is limited. very inadequate

As the main unit for burning anthracite or low volatile coal, the W flame boiler still fails to consider CO 2 collection and emission reduction

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