Self-dust-removal type pyrolyzing and cracking system for oil shale

Abstract

The invention belongs to the technical field of oil shale pyrolysis and mainly relates to a self-dust-removal type pyrolyzing and cracking system for oil shale particles based on regenerative radiant tube heating. The system comprises a pyrolysis hopper, a first feeding device, a pyrolyzing and cracking reactor, regenerative radiant tubes, a heat insulation brick wall, a communicating member, a particle bed dust removing device, a spraying tower and a gas tank, wherein the pyrolyzing and cracking reactor comprises a feed opening, a pyrolysis chamber, a cracking chamber and a cracking gas outlet. The reaction system disclosed by the invention has the advantages of simple structure, convenience in operation, uniform temperature distribution and good heating effect; the particle bed dust removing device is arranged at an oil gas outlet of the pyrolysis chamber; after oil gas generated by the pyrolysis chamber is subjected to dust removal through a particle bed, clean oil gas enters the cracking chamber for deep cracking; tar macromolecules are cracked into small molecule gaseous hydrocarbons, and a large amount of clean cracking gas products are generated, so that the dust removing pressure at the rear end is reduced, the problem that pyrolysis oil contains dust is solved, and clean and efficient utilization of fossil fuel is really realized.

Description

technical field [0001] The invention belongs to the technical field of oil shale pyrolysis, and mainly relates to a self-dusting granular oil shale pyrolysis and cracking system based on heat storage radiant tube heating, which is used for producing clean combustible gas. Background technique [0002] The world is rich in oil shale resources. The total proven oil shale reserves of 37 countries are converted into more than 400 billion tons of shale oil, which is far larger than the world's proven crude oil reserves and also larger than the world's crude oil resources. my country's proven oil shale reserves are converted into about 40 billion tons of shale oil. At present, for some countries such as China, the crude oil produced cannot meet their own needs, and must rely on a large amount of imported crude oil. Oil shale retort furnaces can be divided into massive shale retort furnaces (oil shale particle size is generally above 8mm or 10mm), granular and powder oil shale ret...

AI Technical Summary

Problems solved by technology

The main purpose of the existing pyrolysis furnaces is to produce oil products, but most of the pyrolysis furnaces, especially the furnaces that process powdery oil shale as raw materials, contain a lot of dust in the pyrolysis oil, causing pyrolysis It is difficult to effectively use oil, and the value of pyrolysis oil is not high

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