Method for recycling oil shale residues and calcining device thereof

Abstract

The invention discloses a calcining device used in a method for recycling oil shale residues, which is used in the field of building material engineering, and comprises a heating device, three cyclone separators and an exhaust fan, a connecting pipe is assembled between every two adjacent cyclone separators, and the heating device is used for heating the cyclone separators; wherein the discharge ports of the two cyclone separators are respectively communicated with the two connecting pipes, and the air inlet of the exhaust fan is communicated with the air outlet of one cyclone separator; and the calcining rotary kiln is obliquely arranged on the horizontal ground, a spiral assembly enabling the micro-particle materials to spirally roll forward is arranged in the calcining rotary kiln, and a combustor for combusting the micro-particle materials is arranged at the kiln head of the calcining rotary kiln. According to the invention, the oil shale residue micro-particle material is effectively calcined through the three steps of heating, calcining and cooling in the calcining device, so that the oil shale residue micro-particle material is converted into the building material with hydraulicity, and the defects that the oil shale residue is harmful and cannot be developed and utilized on a large scale are overcome.

Description

technical field [0001] The invention is used in the field of building material engineering, and in particular relates to a method for recycling oil shale slag and a calcining device thereof. Background technique [0002] my country is rich in oil shale resources. The proven oil shale reserves exceed 700 billion tons, and the extractable shale oil exceeds 47.6 billion tons. The techniques for extracting shale oil from oil shale include underground in-situ extraction and above-ground extraction. Underground in-situ mining is also underground carbonization technology, which is mainly carried out by American companies in the United States. It directly heats underground oil shale through electric heating, fluid heating, radiation heating and other technologies, and the kerogen in oil shale decomposes into shale oil, Shale gas is precipitated in the form of gas and collected on the ground. This technology is firstly because some organic matter cannot be completely precipitated an...

AI Technical Summary

Problems solved by technology

However, inorganic matter is the main substance, accounting for more than 90%. At present, there are many treatment methods for semi-coke, but it is impossible to achieve all harmless and economical digestion and utilization.

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