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Dry slag discharge fluidized bed gasification reaction device

A fluidized bed gasification and reaction device technology, which is applied in the mechanical details of gasification devices, granular/powdered fuel gasification, and combustible gas production. , high repair and maintenance costs, etc., to achieve stable dry slag discharge effect, easy to scale up, and stable fluidization

Active Publication Date: 2017-02-15
SHANGHAI BOILER WORKS
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Problems solved by technology

Under such operating conditions, the slag discharge pipe is exposed to harsh working conditions such as high temperature and high pressure and molten ash adhesion for a long time, which seriously affects the service life of the slag discharge pipe. Therefore, it must be replaced or repaired frequently. Due to the expensive materials used, High repair and maintenance costs, and frequent shutdowns lead to a substantial increase in production costs
[0006] According to the existing industrial application and operation of fluidized bed gasification, it is found that the carbon conversion rate of fluidized bed gasification technology has been relatively low because its reaction temperature is lower than the melting point of fuel ash, and its residence time is lower than that of fixed bed. Low level, hard to reach 99% carbon conversion level for entrained and fixed bed gasification reactors

Method used

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  • Dry slag discharge fluidized bed gasification reaction device
  • Dry slag discharge fluidized bed gasification reaction device
  • Dry slag discharge fluidized bed gasification reaction device

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Embodiment 1

[0050] Take a fluidized bed gasification reactor with a daily processing capacity of 720 tons of lignite as an example. The coal quality data of fuel coal are shown in Table 1. The design parameters of the gasification reaction device are as follows:

[0051] Operating pressure: 0.5MPaG;

[0052] Operating temperature: 1000°C;

[0053] Gasification agent: pure oxygen and water vapor;

[0054] Fuel particle size: 0~10mm, average particle size 6mm;

[0055] Reactor structure: the diameter of the gasification chamber in the lower section is 1.1m, and the height is 8m; the diameter of the gasification chamber in the upper section is 2.1m, and the height is 15m;

[0056] Cycle ratio: 30;

[0057] Gasification agent distribution: 65% of the central slag discharge pipe, 25% of the air distribution plate, and 10% of the second-stage burner chamber;

[0058] Slagging temperature: 900°C;

[0059] Superficial velocity of cross-section inside the reactor: 3.2m / s.

[0060] Table 1 ...

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Abstract

The invention discloses a dry-process deslagging fluidized bed gasification reaction device which comprises a reactor body, a multi-stage cyclone separating device, an air distribution device, a feed system and a return system. The dry-process deslagging fluidized bed gasification reaction device disclosed by the invention adopts a circulating fluidized bed reactor as a gasification reaction body, realizes the dry-process deslagging by adopting medium-high temperature gasification, achieves the purpose of improving carbon transformation rate and cooled coal gas efficiency by adopting two-stage type graded gasification, enhances the operation and running stability by combining a simplified deslagging device and an air distribution plate design, is suitable for the gasification transformation of various carbon-containing solid fuels and has large-scale popularization and application prospect.

Description

technical field [0001] The invention relates to a dry slag discharge fluidized bed gasification reaction device, which belongs to the technical field of coal gasification polygeneration. Background technique [0002] Based on coal-based polygeneration technology and coal gasification. The existing gasification technologies are mainly divided into three types: entrained bed, fluidized bed and fixed bed gasification. The entrained bed is mainly based on high-temperature liquid slagging gasification technology, the fixed bed is mainly based on medium-high temperature solid slagging technology, and the fluidized bed gasification technology has both dry slagging technology and liquid slagging technology, but the current industrial operation The current gasification technology is mainly based on the molten semi-dry slag discharge method. Fluidized bed gasification reactor is favored by users for its wide range of fuel adaptability, but its operation instability and technical mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/56C10J3/84C10J3/72
CPCC10J3/56C10J3/721C10J3/84C10J2200/09
Inventor 倪建军杨震张建文池国镇
Owner SHANGHAI BOILER WORKS
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