Biomass pyrolysis reactor and working method thereof

Abstract

The invention discloses a biomass pyrolysis reactor and a working method thereof. The biomass pyrolysis reactor comprises a pyrolysis product conveying section, a reactant and product separation section, a circulation pyrolysis reaction section and a hot carrier gas inlet section, which are sequentially arranged from top to bottom. The pyrolysis product conveying section is used for quickly leading a pyrolysis oil gas product out of the biomass pyrolysis reactor; the reactant and product separation section is used for reducing the apparent gas velocity and efficiently and quickly separating apyrolysis product from incompletely reacted biomass; the circulation pyrolysis reaction section is provided with a guide cylinder, a guide area, an annular space area, a biomass feeding port and a return section and used for overall ordered circulation of biomass and hot carrier gas, that is, the hot carrier gas and large-particle biomass directionally flow in the circulation pyrolysis reaction section, and multiple times of circulation are formed. The flowing environment of biomass and hot carrier gas is effectively improved, the mixing and heat exchange behaviors of biomass and hot carrier gas are ensured, the sufficient pyrolysis of biomass is realized, the secondary pyrolysis reaction of pyrolysis oil gas is weakened, and the yield of pyrolysis oil gas is increased.

Description

technical field [0001] The invention relates to the field of energy, in particular to a biomass pyrolysis reactor and a working method thereof. Background technique [0002] In my country, with the vigorous development of agriculture and forestry, there is a large amount of agricultural waste (such as straw, rice husk, etc.) and a large amount of forestry waste (wood chips) every year. Based on the increasing demand for high-efficiency, clean and convenient gaseous fuels such as petroleum liquefied gas, it is an urgent need for national production to rationally utilize biomass such as straw and efficiently convert it into usable clean fuels. [0003] Biomass pyrolysis refers to the process of converting biomass into low-molecular substances such as charcoal, liquid and gas through thermochemical conversion under the condition of isolating air or supplying a small amount of air. Pyrolysis can obtain fuel oil, wood tar, wood gas, charcoal and other products. Different pyroly...

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, and provide a biomass pyrolysis reactor with reasonable structural design to solve the problem of uneven heat transfer between hot carrier gas and particles at different temperatures, and the Short residence time in the reactor, insufficient pyrolysis, low yield of pyrolysis products, and serious secondary cracking of pyrolysis oil and gas

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