Oil shale fluidized bed dry distillation system

Abstract

The invention relates to a carbonization system of an oil shale fluidized bed. Oil shale with high oil content and low pyrolysis temperature is used as a carbonization material; high-temperature steam-gas and circulating hot ash are utilized to fluidize and heat the oil shale in a carbonization chamber of the fluidized bed; after ash removal, mixed airflow of generated shale oil and noncondensable gas and vapour in the carbonization chamber of the fluidized bed enters a cooler; the condensed oil-water mixture is divided into shale oil and water through the oil-water separator; the shale oil is transported to a shale oil storage tank; the water is purified and is conducted to the cooler; and noncondensable gas which is not condensed through the cooler is transported to a fuel gas storage tank. Oil shale carbocoal produced through the carbonization chamber of the fluidized bed is directly transported to a boiler of an oil shale carbocoal circulating fluidized bed, is burned and discharges heat; one part of the produced steam-gas is used as fluidized wind of the carbonization chamber of the fluidized bed; the residual steam-gas is conducted to a steam turbine-dynamo system, applies work and generates electricity; and part of circulating ash in the boiler is used as a heat source of the carbonization chamber of the fluidized bed. The carbonization system can realize high-efficient, clean and economic comprehensive utilization of the oil shale.

Description

technical field [0001] The invention relates to a fluidized bed retort system, in particular to a fluidized bed retort system using oil shale with high oil content and low pyrolysis temperature as a retort raw material, which is suitable for integrated utilization of oil shale retort / incineration The technology can realize efficient, clean and economic utilization of oil shale resources, and belongs to the field of dry distillation technology. Background technique [0002] Oil shale is an important potential energy source with huge reserves. Among fossil fuels, its reserves are converted into calorific value and rank second only to coal. If it is converted into shale oil, the world's shale oil reserves are about 400 billion tons, which is equivalent to three times the current world oil reserves. And this number will increase with the further development and utilization of oil shale resources. According to the results of national oil shale resource evaluation from 2004 to 2...

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Problems solved by technology

However, the existing oil shale dry distillation technology has problems such as bulky equipment, high operating costs, single product form, and low shale oil yield, and cannot meet the needs of an oil shale comprehensive utilization system.

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