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Biomass double fluidized bed indirect gasification system and its control method

A dual-fluidized bed gasification system technology, which is applied in the gasification of granular/powdered fuels, the manufacture of combustible gases, and the petroleum industry, can solve the problem of limited catalytic cracking tar capacity, reduced gasification efficiency of gasifiers, and bed materials. single problem, to achieve the effect of increasing gasification temperature and gasification efficiency, reducing tar content, and increasing calorific value

Active Publication Date: 2017-06-06
代建军
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Problems solved by technology

The disadvantage of this method is that the bed material is single, mainly relying on calcium oxide, and its ability to catalytically crack tar is limited. In addition, the temperature of the calcined fluidized bed is relatively high, reaching 950oC, which requires more coke, thereby reducing the gasification efficiency of the gasifier. Higher heat consumption

Method used

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  • Biomass double fluidized bed indirect gasification system and its control method

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Embodiment 1）

[0038] This embodiment includes that the fluidized bed burner 1 is a fast fluidized bed burner, the fluidized bed gasifier 2 is a bubbling fluidized bed gasifier, and the air adding unit 3 of the burner is three air inlets. Burner bed material feed unit 4 at the bottom of bed burner 1, gasifier biomass feed unit 5 at the middle and lower part of fluidized bed gasifier 2, steam pipeline 6 of gasifier, steam at the bottom of gasifier Chamber 7, steam or CO on the side of the gasifier bed 2 Injection port 8, more than two-thirds of the fluidized bed burner 1 is placed in the fluidized bed gasifier 2, and its top is connected with the relative burner primary cyclone separator 9 and the burner primary cyclone Separator two 10; the feed pipe one 11 of the primary cyclone separator one 9 of the burner extends downwards and penetrates into the bed layer at the lower part of the fluidized bed gasifier 2, and the primary cyclone separator one 9 of the burner and the combustion The outp...

Embodiment 2）

[0041] This embodiment includes that the fluidized bed burner 1 is a fast fluidized bed burner, the fluidized bed gasifier 2 is a bubbling fluidized bed gasifier, and the air adding unit 3 of the burner is three air inlets. Burner bed material feed unit 4 at the bottom of bed burner 1, gasifier biomass feed unit 5 at the middle and lower part of fluidized bed gasifier 2, steam pipeline 6 of gasifier, steam at the bottom of gasifier Chamber 7, steam or CO on the side of the gasifier bed 2Injection port 8, more than two-thirds of the fluidized bed burner 1 is placed in the fluidized bed gasifier 2, and its top is connected with the relative burner primary cyclone separator 9 and the burner primary cyclone Separator two 10; the feed pipe one 11 of the primary cyclone separator one 9 of the burner extends downwards and penetrates into the bed layer at the lower part of the fluidized bed gasifier 2, and the primary cyclone separator one 9 of the burner and the combustion The outpu...

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Abstract

The invention relates to a biomass double fluidized bed indirect gasification system and its control method. Double fluidized beds interact to realize combustion and indirect gasification so as to prepare a high-quality biomass syngas. The system provided by the invention comprises a fluidized-bed combustor and its secondary cyclone separator, a fluidized-bed gasifier and a second cyclone separator, a combustor air injection system, a combustor bed material feeding system, a gasifier vapor injection system, a gasifier biomass feeding system, a gasifier and combustor bed material circulatory system, a bed material recovery system, a combustor and a gasifier pressure control system. By the internal and external circulating double fluidized bed indirect gasifier, nitrogen in the air is naturally separated from the syngas. Through improvement of structure design of a reactor, mixed use of different bed materials, a bed material circular flow system and improvement of the gas-solid mixing level, gasification efficiency is raised, calorific value of the syngas is increased, tar content is reduced, and high-quality syngas is prepared.

Description

technical field [0001] The invention relates to a novel biomass double fluidized bed indirect gasification system combined with internal and external circulation and a control method thereof. Background technique [0002] Energy is the basis for the survival and development of modern society. China's current energy supply situation is severe and environmental problems are serious. The development of clean and renewable energy has become an urgent issue. Biomass energy is a low-carbon and clean energy. China has abundant biomass renewable energy resources. Its research, development, promotion and popularization will help reduce pollutant emissions and improve the ecological environment. Biomass gasification technology is a cleaner and more efficient conversion method than direct combustion. Synthesis gas can be used for heat generation, synthetic fuel and chemicals, and hydrogen production. [0003] At present, no fixed bed, moving bed or fluidized bed gasifier can meet the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/56C10J3/84
Inventor 代建军
Owner 代建军
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