Downer rapid catalytic pyrolysis reactor

Abstract

The invention provides a downer rapid catalytic pyrolysis reactor. The reactor is provided with a material inlet, oil gas outlets and a semi-tar outlet; the semi-tar outlet is formed in the bottom of the reactor, the material inlet is formed in the center of the top of the reactor, and the oil gas outlets are formed in the side wall of the reactor. The reactor further comprises a catalyst conveying pipe, radiant tubes, oil gas output pipes, gas collection pipes and a stirring device, wherein the catalyst conveying pipe extends into the reactor through the side wall of the reactor; the radiant tubes are arranged into multiple layers in the height direction of the reactor; the oil gas output pipes are arranged into multiple layers in the height direction of the reactor, and multiple oil gas output pipes which are parallel to one another in the horizontal direction are arranged on each layer; the oil gas output pipes are communicated with the gas collection pipes, and the gas collection pipes are communicated with the oil gas outlets; the stirring device comprises a stirring shaft and multiple stirring rods connected to the stirring shaft. By means of the downer rapid catalytic pyrolysis reactor, pyrolysis efficiency can be improved, and the tar yield can be raised.

Description

Technical field [0001] The invention belongs to the field of coal chemical industry. Specifically, the invention relates to a descending bed rapid catalytic pyrolysis reactor. Background technique [0002] my country is a country rich in coal, short of oil, and low in gas. The characteristics of my country's energy structure determine that its energy is mainly coal resources. According to related reports, medium and low-rank coals account for more than 55% of my country’s proven coal resources. At the same time, low- and medium-rank coals are rich in oil and gas resources. Direct combustion not only causes energy waste, but also causes environmental pollution, so how to effectively The use of low- and medium-rank coal can not only improve my country's energy structure and alleviate the problem of energy shortage, but also has great economic value. [0003] At present, the existing technologies for processing low- and medium-rank coals on the market mainly include direct combustion,...

AI Technical Summary

Problems solved by technology

The current fast pyrolysis technology is mainly based on gas heat carrier and solid heat carrier. Among them, the gas heat carrier consumes a lot of gas, the pyrolysis gas is diluted and lost, the subsequent purification process is under high pressure, and a large amount of waste water is generated; the solid heat carrier method is extremely complicated. , it is difficult to achieve continuous operation

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