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Method and device for cutting Fischer-Tropsch synthesis light oil with dividing wall columns

A tower cutting fee and Fischer-Tropsch synthesis technology, which is applied in the petroleum industry, processing hydrocarbon oil, hydrocarbon distillation, etc., can solve the problems of complex process, high energy consumption and equipment cost, and difficult to use products carefully.

Active Publication Date: 2019-03-01
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned literature generally has problems such as unclear fractions of the obtained product and difficult to finely utilize the product. In addition, there are defects such as complicated process, high energy consumption and equipment cost.

Method used

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  • Method and device for cutting Fischer-Tropsch synthesis light oil with dividing wall columns
  • Method and device for cutting Fischer-Tropsch synthesis light oil with dividing wall columns
  • Method and device for cutting Fischer-Tropsch synthesis light oil with dividing wall columns

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Embodiment 1

[0044] Applying the invention to a narrow fraction cut process for Fischer-Tropsch synthetic light oils, such as Picture 1-1 As shown, including the first single dividing wall column (T11), the second single dividing wall column (T12), the third single dividing wall column (T13), condenser, reboiler, pump and related feed lines and connection of the above equipment pipeline. The raw material is 1000g Fischer-Tropsch synthetic oil light oil, which contains hydrocarbons in the range of C6-C10 and trace amounts of oxygen-containing compounds. The hydrocarbons mainly include normal alkanes and α-olefins, and also include some isoparaffins, internal olefins, branched olefins, and a small amount of cycloalkanes, aromatics, and cycloolefins. Oxygenated compounds include one or more of alcohols, aldehydes, ketones, acids, and esters. The first single partition tower (T11) pre-separation tower ( Pic 4-1 The number of theoretical plates in the area a) is 10, and the main tower ( P...

Embodiment 2

[0046] Applying the invention to a narrow fraction cut process for Fischer-Tropsch synthetic light oils, such as diagram 2-1 As shown, it includes the first double dividing wall column (T21), the second double dividing wall column (T22), condenser, reboiler, pump and related feed lines and pipelines connecting the above equipment. The raw material is 1000g Fischer-Tropsch synthetic oil light oil, which contains hydrocarbons in the range of C6-C10 and trace amounts of oxygen-containing compounds. The hydrocarbons mainly include normal alkanes and α-olefins, and also include some isoparaffins, internal olefins, branched olefins, and a small amount of cycloalkanes, aromatics, and cycloolefins. Oxygenated compounds include one or more of alcohols, aldehydes, ketones, acids, and esters. The pre-separation tower ( Figure 4-2 The number of theoretical plates in the e region) is 10, and the first main column ( Figure 4-2 The f area in) theoretical plate number is 200, the first ...

Embodiment 3

[0048] Applying the invention to a narrow fraction cut process for Fischer-Tropsch synthetic light oils, such as image 3 As shown, including five dividing wall columns (T3), condenser, reboiler, pump and related feed lines and pipelines connecting the above equipment. The raw material is 1000g Fischer-Tropsch synthetic oil light oil, which contains hydrocarbons in the range of C6-C10 and trace amounts of oxygen-containing compounds. The hydrocarbons mainly include normal alkanes and α-olefins, and also include some isoparaffins, internal olefins, branched olefins, and a small amount of cycloalkanes, aromatics, and cycloolefins. Oxygenated compounds include one or more of alcohols, aldehydes, ketones, acids, and esters. The pre-separation tower ( Figure 4-3 1 area in) the number of theoretical plates is 200, the first main column ( Figure 4-3 2 areas in) the number of theoretical plates is 10, the first public rectification section ( Figure 4-3 3 areas in) the number of...

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Abstract

The invention relates to a method and a device for cutting Fischer-Tropsch synthesis light oil with dividing wall columns to obtain products of all carbon number fractions. The technology can adopt aprocess of two double-dividing wall columns or one five-dividing wall column as well as a process of three single-dividing wall columns, and the process of three single-dividing wall columns and the process of two double-dividing wall columns can adopt different separation sequences. After separation and purification with the technology, the mass content of C6-C10 fraction products can reach 99% or above, and the recovery rate can reach 95% or above. The method and the device have the characteristics that products with different boiling points are separated by the aid of the dividing wall column technology, energy consumption and equipment cost can be greatly reduced, and higher economic benefits can be created.

Description

technical field [0001] The invention relates to a method and device for cutting Fischer-Tropsch synthetic light oil by using a dividing wall tower to obtain fractional products of various carbon numbers, and is particularly suitable for cutting Fischer-Tropsch synthetic light oil mainly containing C6-C10 fractions. Background technique [0002] Fischer-Tropsch synthesis is the indirect coal liquefaction process, in which the synthesis gas (CO, H 2 ) into gasoline, diesel and other hydrocarbon products. The reaction crude products are mainly light oil, heavy oil and heavy wax. Fischer-Tropsch synthesis products are usually used to further produce gasoline, diesel, naphtha and other products, and the olefins in them need to be hydrotreated, resulting in the waste of α-olefin components with higher added value. The main substances in Fischer-Tropsch synthetic light oil are C6-C10 normal paraffins and normal olefins, and the olefin components are mostly α-olefins, which have t...

Claims

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Application Information

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IPC IPC(8): C10G7/00
CPCC10G7/00C10G2300/1022
Inventor 高鑫赵悦蔡力宏袁炜刘素丽李洪李鑫钢
Owner TIANJIN UNIV
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