Method for preparing light oil from low-hydrogen-content oil with self-contained asphalten

Abstract

The invention provides a method for preparing light oil from low-hydrogen-content oil with self-contained asphalten. The method is suitable for processing of medium-low temperature coal tar. According to the invention, a deep evaporation method is adopted to isolate the medium-low temperature coal tar into distillate oil vapor V1 and liquid L1 under the condition of no occurrence of obvious coking, wherein the liquid L1 is mainly composed of macromolecular colloidal bituminous components; after cooling and molding, the liquid L1 used as soft coal or green coal can be used as fire coal to achieve green storage and usage of the liquid L1; and the distillate oil vapor V1 is condensed to obtain an oil product which can be used for preparing a clean oil product via a hydrogenation process. The method for preparing light oil from low-hydrogen-content oil with self-contained asphalten provided by the invention enables the product direction of the macromolecular colloidal bituminous components in medium-low temperature coal tar to jump out of the traditional range of coke, coal tar pitch, fuel oil, suspended-bed or bubbling-bed hydrogenation raw material to produce coal-like products; and the traditional concept of ultimate obtainment of light oil and residual oil through vapor-liqiud separation is converted into the concept of ultimate obtainment of light oil and solid through vapor-liqiud separation.

Description

technical field [0001] The present invention relates to a kind of method for producing light oil from asphaltene-containing low-hydrogen content oil; particularly the present invention relates to a kind of method for producing light oil from asphaltene-containing coal tar; more particularly The present invention relates to a method for producing light oil from medium and low temperature coal tar containing asphaltenes. The medium and low temperature coal tar is separated into distillate steam V1 by adopting a deep vaporization method without obvious coking reaction. And liquid L1 mainly composed of macromolecular colloidal asphalt-like components, liquid L1 can be used as "soft media" or coal green after cooling and forming, which can be used as coal to realize its environmental protection storage and use; distillate steam V1 The condensed oil can be hydrogenated to produce clean oil. The present invention jumps out the product direction of the macromolecular colloidal pitch-...

AI Technical Summary

Problems solved by technology

[0004] ① To produce delayed coke, it is necessary to build a coking unit, increase investment, increase energy consumption, and at the same time convert a large amount (about 50%) of components with a conventional boiling point of 500-540°C into coke. Industrial production shows that medium-temperature coal tar in northern Shaanxi As a raw material, the yield of coke is about 14.5%, and the yield of coking gas is about 5.0%, and the quality of coke is poor, and the scope of use is limited; it belongs to the uneconomical "oil zoom, gas" process;

[0005] ②In the production of fuel oil, in order to meet the requirements of the viscosity and freezing point of fuel oil, the content of light oil in it is relatively high, resulting in low-value utilization of this part of the components. Industrial production shows that using medium-temperature coal tar in northern Shaanxi as raw material, fuel The oil yield is about 10-15%. At the same time, because of its poor combustion performance, serious pollution, and low price, the scope of use is limited, and it is not economical to use;

[0006] ③The production of coal tar pitch is difficult to sell due to its high ash content and low coking value;

[0017] Method of the present invention has no report

Images