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A self-tar removing biomass fixed bed gasifier system

A fixed-bed gasifier, biomass technology, applied in the petroleum industry, the manufacture of combustible gas, etc., can solve the problems of circulating water pollution of the working environment, cost increase, deterioration, etc., to improve energy utilization, save investment costs, save The effect of cooling loss

Active Publication Date: 2014-11-26
GUANGZHOU XINGUANGHE ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the above technical solution, external tar removal is adopted, and the tar precipitated by external water washing is discharged into the environment together with water, causing pollution to the circulating water and deterioration of the working environment, and causing serious pollution to the external environment
[0008] However, increasing the gas temperature by increasing the secondary and tertiary air is actually at the cost of sacrificing the calorific value of the gas, and increasing the gas temperature greatly increases the requirements for gas pipelines and subsequent equipment, and the cost will also increase accordingly. If the road is extended, the gas will inevitably cool down. Once the temperature cools down, tar will be produced.
[0009] These two technologies solve the tar problem under the premise of sacrificing the environment, investment cost (equipment service life) or output efficiency, and both have very obvious defects

Method used

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  • A self-tar removing biomass fixed bed gasifier system
  • A self-tar removing biomass fixed bed gasifier system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as figure 1 As shown, the self-tar removal type biomass fixed-bed gasifier system of this embodiment includes a self-removal tar type biomass fixed-bed gasification furnace 1, and a refrigerant cooling device (cooling tower, not shown in the figure), feed Device 2, tail ash conveying device 3, gasification medium supply device 4, furnace start and release device 5, water seal valve 6, second-stage tar removal device 7, gas pipelines 801, 802, 803.

[0043] Among them, such as figure 2 The self-tar removal type biomass fixed-bed gasification furnace 1 shown includes a furnace body arranged vertically, a steam generator 121 , and a recirculation gas heating section 122 . From bottom to top, the furnace body consists of a cone-shaped tail ash section 11, a cylindrical reaction section 12, and a tar removal section 13. A water-cooled fire grate 15 is provided between the tail ash section 11 and the reaction section 12 . The top of the tar removal section 13 is prov...

Embodiment 2

[0054] The differences between this embodiment and Embodiment 1 are: (1) The number of tar removal device in the furnace is one; (2) The steam generator has two outlets, and there are also two gasification medium inlets, one It is connected to the water inlet of the water basin, the other outlet of the steam generator is connected to a gasification medium inlet, and the other gasification medium inlet is fed with air.

Embodiment 3

[0056] The difference between this embodiment and Embodiment 1 is that the number of tar removal devices in the furnace is three.

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Abstract

The present invention provides a self-tar removing biomass fixed bed gasifier system. The system comprises a self-tar removing biomass fixed bed gasifier which comprises a gasifier body arranged in a longitudinal direction, and the gasifier body comprises a cone hopper-shaped tail ash portion, a cylindrical reaction portion, and a tar removing portion from bottom to top. The top of the tar removing portion is provided with a fuel gas outlet; the bottom of the tail ash portion is provided with a taphole; the side portion of the tail ash portion is provided with at least one gasifying medium inlet; the side of the top of the reaction portion is provided with a feeding inlet; a separating plate is arranged between the reaction portion and the tar-removing portion, and a fuel gas inlet communicating with the reaction portion is provided on the separating plate; a tar removing device is arranged inside the tar removing portion, the tar removing device comprises a condensing tube which comprises a cylindrical housing with two ends open, and the lower end opening of the cylindrical housing is connected to the fuel gas inlet on the separating plate; the gasifier wall of the tar removing portion, the separating plate, and the housing of the tar removing device form a space where the fuel gas can not enter; and multiple pipe bundles made from cooling pipes are arranged inside the cylindrical housing.

Description

technical field [0001] The invention relates to a self-tar removal type biomass fixed-bed gasifier system. Background technique [0002] Biomass is a very important renewable energy, which has the characteristics of renewability, low pollution and wide distribution. The use of biomass as an alternative energy source is of great significance to low-carbon emission reduction, reduction of "greenhouse effect" and improvement of atmospheric acid rain environment. Biomass gasification system is to use biomass to burn in a closed anoxic furnace in a gasifier, and produce combustible gas after dry distillation, pyrolysis and thermochemical oxidation. [0003] Fixed bed gasifier is an important type of biomass gasification system. In a fixed-bed gasifier, the fuel exists in a piled state in the furnace, and the gasification process is completed by layer combustion. Because the fuel pyrolysis time of the fixed-bed gasifier is longer and the pressure is more, the tar content in the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/20C10J3/84
Inventor 赵广健马培碧杨昌良梁鸿超
Owner GUANGZHOU XINGUANGHE ENVIRONMENTAL PROTECTION TECH
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