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Method of producing low-sulfur low freezing point diesel by full-range shale oil

A shale oil and full-distillate technology, which is applied in the production of low-sulfur and low-concentration diesel oil, can solve the problems of complex process flow, high investment and operating costs, and solve the problems of insufficient processing depth, high product yield, and flexible product solutions. Effect

Active Publication Date: 2015-05-20
ENERGY & ENVIRONMENT RES INST OF HEILONGJIANG PROVINCE
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The purpose of the present invention is to provide a method for producing low-sulfur and low-point-point diesel oil by using full-fraction shale oil to solve the technical problems of complex process flow and high investment and operating costs in the existing method for producing diesel oil from shale oil

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  • Method of producing low-sulfur low freezing point diesel by full-range shale oil
  • Method of producing low-sulfur low freezing point diesel by full-range shale oil
  • Method of producing low-sulfur low freezing point diesel by full-range shale oil

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specific Embodiment approach 1

[0046] Specific implementation mode 1: In this implementation mode, the method for producing low-sulfur and low-point-point diesel oil using full-fraction shale oil is as follows:

[0047] 1. Raw material pre-fractionation unit:

[0048] The full-fraction shale oil enters the atmospheric fractionation tower for pre-fractionation under the conditions of tower top temperature 165-175°C, tower bottom temperature 295-310°C, tower top pressure 0.30-0.35MPaG, and the product is light shale Rock oil, heavy shale oil and non-condensable gas;

[0049] 2. Reaction unit:

[0050] The non-condensable gas is compressed to 0.5MPa in the first stage and enters the liquid separation tank for liquid separation, and then compressed to 3.5MPa in the second stage and enters the absorption tower. It is absorbed by light shale oil to obtain absorbed oil and fuel gas, and the absorbed oil is sent to the flash tank Flash evaporation to obtain desorption gas and desorption oil. The desorption oil re...

specific Embodiment approach 2

[0064] Specific embodiment two: What this embodiment differs from specific embodiment one is that the diameter of the atmospheric fractionation tower described in step one is 3.5m, high 25.0m, adopts 20 layers of single-flow composite float valve trays, and the fractionation tower adopts normal pressure The operation does not draw the side line, the light shale oil is discharged from the top of the tower, and the heavy shale oil is pumped out from the bottom of the tower. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0065] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the dehydrogen sulfide stripping tower described in step 3 has a diameter of 3 m and a height of 20 m, and adopts 15 layers of single-flow composite valve trays. Others are different from the first or second specific embodiment.

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Abstract

The invention relates to a method of producing low-sulfur low freezing point diesel by full-range shale oil, relates to a production method of low-sulfur low freezing point diesel and solves the technical problems that the existing method of producing diesel by shale oil is complex in process and high in investment and operational cost. A material pre-fractionation unit, a reaction unit and a fraction unit are adopted in the method. The method has the advantages that finished diesel yield is high during processing of the full-range shale oil; the quality of the low-sulfur low freezing point diesel meets the national standard IV; a product scheme is flexible, the production of refined diesel and the production of the low-sulfur low freezing point diesel are both considered, and product distribution is adjusted; during the processing of the full-range shale oil, the material pre-fractionation unit is additionally provided with an absorbing column and a flash tank, lightweight shale oil is used as absorbent, LPG components in noncondensable gas can be recycled, applying a product stabilization column to the product fractionation unit to separate LPG and naphtha is avoided, and cost reduction and efficiency increasing are achieved. The invention belongs to the field of diesel production.

Description

technical field [0001] The invention relates to a production method of low-sulfur and low-condensation diesel oil. Background technique [0002] Entering the 21st century, my country's economy is developing rapidly, and energy demand is growing rapidly. According to statistics, domestic crude oil production in 2012 was 207 million tons, apparent consumption of crude oil reached 476 million tons, crude oil imports increased from 74 million tons in 2001 to about 269 million tons in 2010, and its dependence on foreign countries exceeded 56%. With the high price of international crude oil and the increasing depletion of conventional crude oil, it brings opportunities for the development and utilization of shale oil, and becomes a direct driving force for the development of shale oil upgrading and conversion technology. During the "Twelfth Five-Year Plan" period, the development of the logistics and transportation industry and the rapid increase in transportation vehicles have b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/00
Inventor 陈松徐晓秋周扬张帆周国江
Owner ENERGY & ENVIRONMENT RES INST OF HEILONGJIANG PROVINCE
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