High temperature normal pressure biomass gasification island process

Abstract

The invention provides a high temperature normal pressure biomass gasification island process. The process comprises the procedures of pretreatment and storage of biomass, gasification by using a biomass gasification furnace, cooling of gasified crude gasification gas, rinsing, dedusting and storage of fresh gasification gas, wherein in gasification by using the biomass gasification furnace, an external heat source is used to supply heat, reaction temperature in the gasification furnace is controlled to be 1300 to 1750 DEG C, liquid state slag removal is adopted by the gasification furnace, cooling of gasified crude gasification gas is realized through recovery of sensible heat by a quenching tower and a two-stage heat boiler, cooled crude gasification gas is subjected to rinsing and electric precipitation, fresh gasification gas is stored in a gas storage cabinet, and whole gasification island equipment operates under a negative pressure or a positive pressure of 0 to 50 KPa. According to the process, the external heat source is utilized for gasification, which enables the quality of crude gasification gas to be improved; a normal pressure fixed bed is employed for gasification, which enables the equipment of gasification furnace body to have the advantages of simpleness, small investment and easy operation; feeding, deslagging and purifying systems are simple; a wide variety of raw materials are applicable, gasification of various biomass, MSW, raw coal, sludge and the like can be realized, and blended gasification of a plurality of fuels can be realized; systems and equipment are mature, and a high localization degree is obtained.

Description

technical field [0001] The present invention relates to an integrated gasification island process for biomass gasification at high temperature and normal pressure, specifically a biomass pretreatment and storage unit, a biomass gasification furnace gasification unit, and crude gasification gas cooling and washing for gasification. , a complete set of high temperature and atmospheric pressure biomass gasification island process of dust removal unit and fresh gasification gas storage unit. Background technique [0002] Improving energy efficiency and saving energy is a long-term strategic policy for the development of my country's national economy, and it is also one of the main countermeasures for energy conservation and emission reduction in my country. [0003] Compared with the relatively backward low-level utilization form of fuel combustion, the value of gasification gas formed after fuel gasification is greatly improved, and its use is also very wide. For example, gasi...

AI Technical Summary

Problems solved by technology

But the overall level is still very backward, technically immature, and there are many technical problems

Many demonstration projects built in China have many technical problems, mainly in the low effective components of gasification gas, high tar content, small scale capacity, unstable operation, high operating cost, and difficulty in commercial operation

[0007] In recent years, Europe and America have carried out a lot of research on biomass gasification technology, such as: plasma gasification process, pyrolysis process, staged gasification process, etc., and pilot plants of various scales have been built using these technologies. And achieved considerable technical achievements, but currently no commercial operation

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