A kind of heavy tar selective catalytic upgrading device and method thereof

Abstract

A heavy tar selective catalytic upgrading device and a method thereof, relate to a catalytic upgrading device and a method thereof, the device is divided into a heating zone and a reactor, the inner member of the reactor is arranged with pores or channels, and the solid The fuel is fed into the solid fuel channel from the top, and is pyrolyzed by the outer high temperature area. The pyrolysis products radially pass through the solid fuel bed at low temperature in the center, and the light tar and gas enter the light component channel directly from the upper region of the reactor. It is directly discharged from the reactor; as the bed moves down, the temperature of the central bed gradually increases, and the adsorbed heavy tar is desorbed again, enters the heavy tar channel, and then undergoes catalytic cracking and upgrading through the catalyst layer. Semi-coke produced by pyrolysis is discharged from the lower section of the reactor. The invention realizes the selective catalytic cracking of the heavy tar with poor quality, improves the tar quality, avoids the obvious decrease of the tar yield caused by the catalytic cracking of the light tar, and realizes the tar yield on the basis of minimizing the decrease of the tar yield. Quality improvement.

Description

technical field [0001] The invention relates to a tar catalytic cracking device and a method thereof, in particular to a heavy tar selective catalytic upgrading device and a method thereof. Background technique [0002] Hydrocarbon solid fuels include coal, biomass, oil shale, urban solid waste, etc. Currently, the main utilization methods are direct combustion and gasification, neither of which efficiently utilizes the high value-added volatiles in solid fuels. Through pyrolysis technology, hydrogen-rich volatiles can be precipitated in the form of high-quality liquid products and gas-phase products under mild conditions, and carbon-rich semi-coke can be obtained at the same time. Pyrolysis tar can extract high-value aromatic chemicals or hydrogenate to produce fuel oil, which can make up for the shortage of oil supply in my country to a certain extent. The pyrolysis gas has a high calorific value. Combustion to generate electricity for heating or to synthesize chemicals su...

AI Technical Summary

Problems solved by technology

However, in this method, heavy tar and light tar are all catalyzed, and light tar is inevitably converted into heavy part and pyrolysis gas, resulting in a decrease in tar yield.

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