Solid biomass gasification system and process thereof

Abstract

The invention discloses a solid biomass gasification cracking process which comprises the following steps: a) dry distillation treatment: carrying out the dry distillation treatment on solid biomass for forming biological coke and dry distillation gas; b) high-temperature cracking treatment: inputting the biological coke and the dry distillation gas into a thermal cracking gasification furnace for carrying out the high-temperature cracking treatment; and c) catalytic cracking treatment: using a fixed bed layer constituted by a metallurgical coke block catalyst to carry out the catalytic cracking treatment on the dry distillation gas which flows by the fixed bed layer and residual coke tar in pyrolysis gas. The solid biomass gasification cracking process can solve the technical difficult problem that the complete cracking of the coke tar can not be realized by dry distillation gasification or pyrolysis gasification through the combination of the dry distillation gasification, the high-temperature thermal cracking gasification and the catalytic cracking technology, and further prevent and treat coke tar sewage, environmental pollution caused by heavy metal salts and the like. The invention further discloses a solid biomass gasification cracking system, which comprises a dry distillation furnace, a thermal cracking gasification furnace connected with a gas outlet and a slag outlet of the dry distillation furnace and a gas purification device connected with the gas outlet of the thermal cracking gasification furnace.

Description

technical field [0001] The invention relates to the technical field of solid biomass gasification, more specifically, to a solid biomass gasification system and a process thereof. Background technique [0002] Surplus crop stalks and other agricultural and forestry solid waste around the city are discarded and incinerated at random, and environmental pollution caused by urban solid domestic waste and sewage treatment plant waste landfill has posed a serious threat to the living environment of human beings. On the other hand, these organic wastes are renewable energy resources, and random incineration, landfilling, and discarding are also a waste of resources. In recent decades, people have done a lot of work to prevent and control the environmental pollution caused by organic waste and recover energy, and achieved certain results, but there are still many problems. [0003] For example, the straw power plant, its technological process is as follows figure 1 shown. The str...

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Problems solved by technology

[0004] The tar and sewage produced by the small straw gasification station and power station are difficult to deal with due to poor process equipment, so the promotion of this project is actually at a standstill

Its process is as figure 2 As shown, the gasification efficiency of this technology is low and the pollution is serious

And the tar and sewage produced will cause secondary pollution to the environment

[0005] The process of waste incineration or power generation is similar to that of straw power generation projects, but it is more harmful. Not only are carcinogens such as dioxins easily produced, but the sewage and ash will cause serious secondary pollution.

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