A fluidized bed slag cooling system and method with biomass gasification and co-combustion function

A fluidized bed and biomass technology, applied in the energy field, can solve the problems of large heat loss in slag discharge and lack of matching high-efficiency slag cooling methods, etc., to achieve the effects of ensuring slag discharge, prolonging the gas-solid contact time, and reducing heat loss
CN110553255BActive Publication Date: 2020-09-08HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Publication Date
2020-09-08

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Abstract

The invention discloses a fluidized bed slag cooling system with a biomass gasification co-combustion function and a method, and belongs to the technical field of energy. The system comprises a feeding unit, a gasification and a cooling unit, wherein a biomass feeding pipe of the feeding unit is connected with the slag inlet pipe, and the slag inlet pipe is connected with the gasification unit; the lower part of a gasification chamber of the gasification unit is provided with an inverted cone-shaped air distribution device which is provided with a plurality of layers of stepped air distribution plates, and the center of the bottom of the gasification unit is provided with a slag outlet which is connected with a slag outlet pipe; and the slag outlet pipe is connected with the cooling unit.According to the system, oxygen, carbon dioxide and steam in the flue gas at the tail part of the fluidized bed boiler are treated as gasifying agents, physical sensible heat of high-temperature ash residues of the fire coal is treated as a heat source, and thus the condition of biomass gasification is met; the generated fuel gas is directly introduced into the fluidized bed boiler to be mixed with the coal for combustion; and the system has the advantages of compact structure, high gasification efficiency, capability of reducing carbon dioxide emission and the like.
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Description

technical field

[0001] The invention belongs to the field of energy technology, and more specifically relates to a fluidized bed slag cooling system and method with the function of biomass gasification and co-combustion. Background technique

[0002] With the rapid economic growth and the continuous improvement of people's living standards, the demand for energy supply based on fossil fuels is increasing, and the extensive use of fossil fuels has brought great harm to the environment, such as acid rain, smog and climate change etc. For this reason, people turn their attention to clean, CO 2 The development and utilization of renewable energy with advantages such as zero emission. Among various forms of new energy, biomass has received special attention because of its huge availability, wide distribution, and compatibility with traditional fossil energy.

[0003] Due to the high alkali metal content in biomass, when it is directly burned and used, it is easy to cause probl...

Claims

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