Huadian type process and device for dry distillation of oil shale

Abstract

The invention provides a process and device for carrying out stage dry distillation on oil shale under the state of full recycle, with the gas as the heat carrier. The oil shale is divided into three different sizes (such as 0-6mm, 6-20mm and 20-50mm) through crushing and screening, and the oil shale is firstly dried and heated to the temperature between 50 DEG C and 150 DEG C by the waste smoke exhausted from gas heating furnaces and then enters into the different sizes of furnaces for dry distillation to undergo dry distillation. After being treated by water spraying and an indirect cooling tower, a rotary trapper and an electric trapper for oil collection, the dry distillation oil and gas undergo oil-gas-water separation, and after separation, the oil enters into a storage tank, the water enters into a circulating water tank and the first part of gases serves as the heat carrier and is recycled, the second part of gases is used as the fuels for the heating furnaces and the third part of gases is used as the fuel gases for power generation.

Description

technical field [0001] The invention relates to a technique and a device for performing graded dry distillation of oil shale with gas as a heat carrier under the state of full gas circulation. Background technique [0002] Oil shale is a new energy that can replace petroleum. my country is rich in oil shale resources, hundreds of times the oil reserves, but the level of development and utilization is very low. In 2009, the national shale oil output was only over 300,000 tons, and the development potential is extremely considerable. The main reason for the low level of development and utilization is the backward process and equipment. At present, the domestic oil shale dry distillation refining method is called "Fushun process" in the industry. The main equipment is Fushun type circular furnace, which is a semi-internal combustion and semi-circulation process. The main equipment of this process is a combustion device at the lower part of the retort furnace. Moisture-satura...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of small daily processing capacity, large floor area, low oil recovery rate, environmental pollution, semi-coke not being effectively utilized, and expensive imported equipment in current domestic oil shale retorting refineries, and to provide a Large daily processing capacity, high oil recovery and environmentally friendly dry distillation process

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