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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

Active Publication Date: 2020-09-08
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention proposes a fluidized bed slag cooling system and method with biomass gasification co-combustion function on the basis of the fluidized bed boiler slag cooler, thereby solving the problem of In the existing fluidized bed combustion technology, the heat loss of slag discharge is relatively large, and there is no matching technical problem of high-efficiency slag cooling method. At the same time, the deep coupling of biomass gasification and fluidized bed coal-fired boiler is realized.

Method used

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

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specific Embodiment 1

[0050] The structural representation of specific embodiment one and figure 1 Consistent, the operation mode of the fluidized bed cooling slag system with biomass gasification co-combustion function is the same as the above.

[0051] In particular, the structural parameters of the fluidized bed gasification unit are as follows: the height-to-diameter ratio of the gasification chamber is 12, the inverted conical air distribution plate 8 has a width-to-height ratio of 3, and the air distribution plate is annular and stepped, with 9 layers in total. Such as figure 2 As shown, the width of each air distribution plate is 60mm, and each layer of air distribution plate is provided with 4 rows of vertical air distribution holes 16, the diameter of the vertical air distribution holes is 4mm, and the air distribution holes are arranged in a staggered arrangement with an opening rate of 1.5%. Each layer of air distribution plate is provided with 2 rows of horizontal air distribution hol...

specific Embodiment 2

[0054] The structural representation of specific embodiment one and figure 1 Consistent, the operation mode of the fluidized bed cooling slag system with biomass gasification co-combustion function is the same as the above.

[0055] In particular, the structural parameters of the fluidized bed gasification unit are as follows: the height-to-diameter ratio of the gasification chamber is 9, the inverted conical air distribution plate 8 has a width-to-height ratio of 2, and the air distribution plate is annular and stepped, with 8 layers in total. Such as image 3 As shown, the width of each air distribution plate is 40mm, and each layer of air distribution plate is provided with 2 rows of vertical air distribution holes, the diameter of the vertical air distribution holes is 2mm, the air distribution holes are arranged in staggered arrangement, and the opening rate is 0.8%. Each layer of air distribution plate is provided with a row of horizontal air distribution holes, the dia...

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23C10/26F23C10/24F23B80/00F23J15/02F23J15/06F23K3/14C10J3/00
CPCC10J3/00F23B80/00F23C10/24F23C10/26F23J15/022F23J15/06F23K3/14Y02P20/10
Inventor 杨海平刘恒谢迎谱王贤华邵敬爱杨晴陈应泉张雄曾阔张世红陈汉平
Owner HUAZHONG UNIV OF SCI & TECH
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