Integrated reaction device for preparing aromatic hydrocarbon through biomass pyrolysis-catalytic cracking and application method

Abstract

The invention discloses an integrated reaction device for preparing aromatic hydrocarbon through biomass pyrolysis-catalytic cracking and a method thereof. The integrated reaction device is formed by a biomass pyrolysis furnace, a catalytic cracking reactor, a two-stage spiral feeder, a heat carrier feeder, a catalytic filler feeder, a charcoal collector and the like. A biomass raw material and a heat carrier respectively enter the biomass pyrolysis furnace through the two-stage spiral feeder and the heat carrier feeder; biomass steam enters the catalytic cracking reactor through an outlet in the top end of the pyrolysis furnace so as to be subjected to catalytic cracking reaction to obtain an aromatic hydrocarbon product; biomass ash and the heat carrier enter the charcoal collector through an outlet in the bottom end of the pyrolysis furnace, and is separated through a screen so as to be stored; a catalytic filler is collected through a fan blade type feeder in an outlet in the lower end of the catalytic cracking reactor, and is regenerated and recycled; the heat carrier is recycled through a fluidized bed. According to the integrated reaction device provided by the invention, biomass pyrolysis and product catalytic cracking reaction are coupled, so that the biomass pyrolysis efficiency and the aromatic hydrocarbon product yield are remarkably improved.

Description

technical field [0001] The invention belongs to the field of producing liquid fuel by pyrolysis of biomass, and relates to an integrated reaction device for producing aromatics by pyrolysis and catalytic cracking of biomass. Background technique [0002] Energy is the basis for the survival and development of modern society. The supply capacity of clean fuel is related to the sustainable development of the national economy and is one of the foundations of national strategic security. Due to the decreasing fossil energy and the increasing pollution of the environment, it is becoming more and more important to seek clean and renewable energy. Biomass is the only carbon-containing resource that can be converted into liquid fuels in renewable energy. It can make up for the shortcomings of solar and wind energy in the production of liquid fuels on a large scale, and become an important raw material to replace fossil energy. Biomass can produce aromatic hydrocarbons and other liq...

AI Technical Summary

Problems solved by technology

However, the existing biomass pyrolysis technology has problems such as uneven mixing and contact between biomass raw materials and heat carriers, resulting in low pyrolysis transfer rate, poor pyrolysis efficiency, and difficult separation of biomass pyrolysis product steam from coke and ash.

In addition, the bio-oil produced during the pyrolysis process of biomass is of low quality on the one hand and needs subsequent refining or catalytic transformation before it can be used. On the other hand, it is easy to condense in the pyrolysis reactor, block pipes and valves, and damage the pyrolysis reaction system.

Images