Technology and device for producing national standard oil through fischer-tropsch synthesis oil and coal tar through hydrogenation

Abstract

The invention discloses a technology and device for producing national standard oil through fischer-tropsch synthesis oil and coal tar through hydrogenation. The device comprises a mixed raw oil supply device, a start heating furnace, a reactor and a high-pressure heat exchanger. An outlet of the mixed raw oil supply device is connected with a raw material inlet of the start heating furnace, an outlet of the start heating furnace is connected with an inlet of the reactor, a gas phase outlet of the reactor is connected with an inlet of the high-pressure heat exchanger, hydrogen is introduced into another inlet of the high-pressure heat exchanger, one outlet of the high-pressure heat exchanger is connected with a cooling separation device through a pipeline with a desalted water inlet, another outlet of the high-pressure heat exchanger is connected with the raw material inlet of the start heating furnace, and a liquid phase outlet of the reactor discharges separated product oil. The technology and device for producing the national standard oil through the fischer-tropsch synthesis oil and the coal tar through hydrogenation have the advantages that the conversion rate per pass is high, the technological process is short, the number of high-pressure devices is small, investment cost is reduced, operation cost is low, product quality is good, and safety and reliability are achieved.

Description

technical field [0001] The invention belongs to the field of coal chemical industry, and in particular relates to a process and a device for co-hydrogenating Fischer-Tropsch synthetic oil and coal tar to produce national standard oil. Background technique [0002] With the rapid development of my country's national economy, the demand for refined oil is increasing, and the income of Chinese residents is growing steadily, and the living standard is constantly improving, making the consumption of refined oil still in a stage of rapid growth. However, my country's oil resources are in short supply. It has become an important restrictive factor for my country's economic development. In order to ensure national energy security and sustainable economic development, my country's coal-to-oil products have developed rapidly in the past decade. In addition, my country's urban air pollution is developing from coal-burning emissions to motor vehicle emissions and compound pollution. In...

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Problems solved by technology

It also cannot enter the official sales channel of finished products in my country, and can only be used as a blending component of refined oil, which has the disadvantages of low market price and small profit margin

[0004] However, the current Fischer-Tropsch synthetic oil hydroprocessing unit and tar hydrogenation lightening unit adopt the traditional petroleum refining hydrogenation process, which is not specific to the composition characteristics of Fischer-Tropsch synthetic oil and coal tar, resulting in production failures. Diesel oil cannot fully meet the standard (GB1947-2013 IV), the single-pass conversion rate is low, the yield of diesel oil is low, and the heavy distillate oil in the reaction oil is repeatedly circulated, which eventually causes the system resistance to rise rapidly, and the continuous operation cycle is often only about 7000 hours

Moreover, during the hydrogenation reaction of coal tar, the heavy asphaltenes that have not completely reacted are precipitated in the form of colloids during the cooling process, adhering to the inner surface of the pipeline and heat exchange equipment, causing a large drop in pipeline resistance, poor heat exchange equipment, and even causing Failure of key instruments in the hydrogenation process unit directly threatens the safe and stable operation of the hydrogenation process unit

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