Oil shale refining recovery process

Abstract

The invention discloses an oil shale refining recovery process, which is as follows: dry distillation gas is imported into a concentrated pipe after passing through an ascending tube and an axle tube; condensate out from the concentrated pipe and gas after being primarily cooled enter a gas-liquid separator for separation; the separated gas after entering a primary cooling tower for cooling, enters a spray catcher, the top of an oil collecting tower, and an electrical tar precipitator to remove the residual shale oil mist in the gas, is pressurized by a gas exhauster, and then is respectivelyfed to a gas desulfurization system and a heating furnace and used as circulated gas; the condensate formed by the device respectively enters a light and heavy shale tank, and then is fed into a mechanical clarifier; after stewing, the shale oil separated into the upper layer flows into the shale tank, and then is fed into an oil depot for reserve; the ammonia water in the middle layer is fed to an ammonia water tank as circulated ammonia water; and the shale oil residue in the bottom layer is regularly scraped out. The oil shale refining recovery process has the advantages of good gas purifying effect, less cooling water consumption, centralized oil and gas recovery, obvious recovery effect, high productivity of oil, etc.

Description

1. Technical field [0001] The invention belongs to the technical field of dry distillation of kerogen shale, and in particular relates to a process for oil refining and recovery of kerogen shale. 2. Background technology [0002] At present, domestic and foreign kerogen shale oil refining industrial production countries include China, Brazil, Estonia, etc. my country's kerogen shale oil refining process prevailed in the 1930s and has a history of more than 70 years. The oil shale refining process includes a heating system, a dry distillation system and a recovery system. The heating and dry distillation system uses a dry distillation furnace to heat the oil shale to generate dry distillation gas. The recovery system recovers dry distillation gas, including the recovery of gas and shale oil. The process adopted by the existing recovery system is: the dry distillation gas from the top of the dry distillation furnace is sprayed with ammonia water and cooled to about 80°C when ...

AI Technical Summary

Problems solved by technology

[0003] 1. The cooling tower used for cooling ammonia water causes serious environmental pollution;

[0004] 2. Water washing is used to directly cool the gas, and the cooling effect is poor;

[0005] 3. It is only recovered through the manifold and scrubber, so the oil recovery rate is low and the recovery effect of shale oil is poor;

[0006] 4. The cooling water consumption of this process is large, and the waste of water resources is serious;

[0007] 5. The recovery and cooling equipment is open, and there are many discharge points

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