A biomass gas tar component removal device

Abstract

The invention relates to a device for removing a tar component of biomass gas and belongs to the technical field of biomass energy utilization. The device comprises an annular burner and a heat accumulator, wherein the annular burner is located under the heat accumulator; a diffusion combustion area is formed between the annular burner and the heat accumulator; the annular burner comprises a shell; an air inlet and an air outlet are formed in the shell; and the air inlet is connected with a gradual contracting cavity. The device has the advantages that a stable high temperature field can be formed, the tar component is cracked and removed, the secondary pollution caused by the cleaning of the fuel gas out of the furnace can be avoided, and the energy of the tar component can be fully utilized.

Description

technical field [0001] The invention relates to a biomass gas tar component removal device, which belongs to the technical field of biomass energy utilization, and is especially suitable for a device for removing tar by thermal cracking. Background technique [0002] Biomass energy is the only renewable energy that contains carbon sources and can be stored and transported among renewable energy such as solar energy, wind energy, and water energy. Biomass energy has the advantages of wide distribution, large reserves, and renewable energy. The efficient development and utilization of biomass energy plays an important role and practical significance in ensuring national energy security and reducing greenhouse gas emissions. [0003] During the biomass gasification process, the cellulose, hemicellulose and lignin in the biomass will be thermally decomposed to produce biomass tar. Biomass tar is a complex compound composed of aromatic hydrocarbons and their derivatives and poly...

AI Technical Summary

Problems solved by technology

The main problems of tar include: 1. Tar accounts for 5% to 10% of the energy of combustible gas, and it is difficult to be burned and utilized together with gas at low temperature, resulting in serious waste; 2. Tar condenses into liquid at low temperature, which is easy to mix with water and carbon 3. Tar is difficult to burn completely and produces particles such as carbon black, which seriously damages gas equipment; 4. Tar and its combustion products are harmful to the human body. is harmful

The disadvantages of this method are: 1. It is easy to entrain liquid mist in the gas, and it is not easy to trap the tar; 2. It can only be used at a relatively low temperature, and the equipment, liquid recovery and circulation device are huge, and the power consumption is relatively large; 3. Subsequent treatment of tar-containing waste liquid mist is difficult, costly, and likely to cause secondary pollution

Catalytic cracking of tar is a complex reaction process. In existing industrial applications, catalytic cracking generally requires the addition of an independent cracking reaction system, which greatly increases equipment investment.

The thermal cracking method refers to the decomposition of tar into small molecular gases at high temperatures. The thermal cracking method needs to be above 800°C to obtain a high conversion efficiency. However, in existing industrial applications, it is difficult to form a stable high temperature during thermal cracking. Field, tar removal effect is not ideal

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