High-temperature cracking system for tar in biomass fuel gas

Abstract

The invention relates to a high-temperature cracking system for tar in biomass fuel gas. The system comprises a tar collection tower, wherein the outlet of the tar collection tower is connected with a liquid tar conveyer which is connected with a gasification furnace. The invention can realize centralized recycling of the waste tar, improves the tar utilization rate, facilitates production, ensures low manufacturing cost and is suitable for large-scale application.

Description

[0001] technical field [0002] The invention relates to a tar pyrolysis system, in particular to a biomass tar pyrolysis system. Background technique [0003] The goal of biomass gasification is to obtain as much combustible gas as possible, but coke and tar are unavoidable by-products in the gasification process. Tar is gaseous at high temperature and completely mixed with combustible gas. It will condense into liquid only when the temperature is lower than 200 ° C. Therefore, it is very difficult to separate and handle it in a gasified state. When the gas needs to be cooled and used (such as gas used In domestic or internal combustion engine power generation), the problem is even more prominent. [0004] The existence of tar has many adverse effects on gasification. First, it reduces the gasification efficiency. The energy of tar products in gasification generally accounts for 5%-15% of the total energy. This part of energy is difficult to combine with combustible gas at...

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Problems solved by technology

[0004] The existence of tar has many adverse effects on gasification. First, it reduces the gasification efficiency. The energy of tar products in gasification generally accounts for 5%-15% of the total energy. This part of energy is difficult to combine with combustible gas at low temperature. Secondly, tar condenses into a liquid state at low temperature and mixes with water and coke to block the gas supply pipeline and affect the normal operation of the gasification equipment

Thirdly, the tar condensed into fine droplets hinders the complete combustion of gas, and the generated carbon black and other particles seriously damage gas utilization equipment (such as internal combustion engines, gas turbines, etc.), which greatly reduces the utilization value of gasification gas

In addition, the viscous tar after cooling is not easy to recover. In most gasification stations, the tar produced in the gasification process of the gasification furnace is discharged, and the tar flows everywhere without management, which not only pollutes the environment, but also wastes the tar. contained energy

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