Device for preparing synthesis gas from biomass

Abstract

The invention provides a device for preparing synthesis gas from biomass, and belongs to the field of biomass utilization. The device comprises a pyrolysis chamber as well as a heat exchange chamber and a graded gasification chamber which are arranged outside the pyrolysis chamber in a sleeving manner, a biomass feed port and a volatile component outlet are formed in the top end of the pyrolysis chamber, and a solid product outlet is formed in the bottom end of the pyrolysis chamber; a synthesis gas outlet is formed in the upper part of the heat exchange chamber, and the lower part of the heat exchange chamber is connected with the grading gasification chamber through a gas-solid separator; the two sides of the grading gasification chamber are connected with a gas mixer, meanwhile, a tangential air distributor is arranged below the grading gasification chamber, and the position where the gas mixer is connected with the grading gasification chamber is located above a solid product outlet, so that the grading gasification chamber is divided into a reforming area and a preliminary gasification area. According to the invention, baking pyrolysis, graded gasification and waste heat utilization are realized through three relatively independent spaces, the continuity of an object and the stability of a reaction are ensured, reaction conditions such as atmosphere and temperature are conveniently and accurately controlled, and a preparation process of clean synthesis gas is simplified.

Description

technical field [0001] The invention belongs to the field of biomass utilization, and more specifically relates to a device for preparing synthesis gas from biomass. Background technique [0002] Biomass, as the only carbon-containing renewable resource, has received extensive attention under the background of fossil fuel depletion and increasingly severe environmental problems. Realizing the effective use of biomass resources is an important way to achieve sustainable development. Biomass can be converted into high value-added gas products through gasification, which has the potential to replace traditional fossil fuel combustible gas. However, tar, as a by-product of biomass gasification, poses a serious threat to downstream synthesis gas utilization equipment, so the development of new technologies to reduce the content of tar in synthesis gas has attracted the attention of the industry. [0003] Biochar-catalyzed tar reforming refers to the introduction of pyrolytic bi...

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Problems solved by technology

[0004] Aiming at the defects of the prior art, the purpose of the present invention is to provide a device for producing synthesis gas from biomass, which aims to solve the existing biomass gasification system Problems of low overall efficiency, complex system and high maintenance cost

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