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Divided plate column for separating four-component mixture with controllable vapor phase distribution ratio

A technology of partition column and distribution ratio, applied in distillation separation, separation method, distillation purification/separation, etc., can solve the problems of high energy consumption, difficult control and high equipment cost for separating four-component mixture, and achieve remarkable separation effect. , Improve product quality and save energy

Active Publication Date: 2017-11-17
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of high energy consumption, high equipment cost, and large floor area for the separation of four-component mixtures in the traditional three-tower process, as well as the difficulty in controlling the vapor phase distribution ratio of the Kaibel partition tower and the high main tower section, the technical problem to be solved by the present invention is , providing a divider column for separating four-component mixtures with a controllable vapor phase distribution ratio
The partition column not only solves the problems of high energy consumption, high equipment cost, and large floor space when separating the four-component mixture in the traditional three-tower process, but also significantly reduces the overall height of the Kaibel tower structure, and overcomes the problem of reflux liquid at the top of the tower and the separation of the four-component mixture. Disadvantages that the rising gas at the bottom of the tower cannot be independently controlled

Method used

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  • Divided plate column for separating four-component mixture with controllable vapor phase distribution ratio
  • Divided plate column for separating four-component mixture with controllable vapor phase distribution ratio
  • Divided plate column for separating four-component mixture with controllable vapor phase distribution ratio

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Effect test

Embodiment 1

[0028]The divider column for separating the four-component mixture with controllable vapor phase distribution ratio in this embodiment includes a public rectification section II and a public stripping section V, wherein the public rectification section II is located at the top of the tower, and the top of the tower is connected to the first condenser C -101, the public stripping section V is located at the bottom of the tower, and the bottom of the tower is connected to the first reboiler R-101; it is characterized in that there are three partitions along the direction of the tower diameter between the public rectifying section II and the public stripping section V Divided into three areas, including pre-fractionation section I, main column section I III and main column section II IV, the pre-fractionation section I is surrounded by the first partition 1, the third partition 3 and the outer wall of the partition column , with a feed inlet; the main tower section Ⅲ is surrounded...

Embodiment 2

[0042] The structure of the partition tower in this embodiment is the same as in Embodiment 1, and the four-component mixture to be separated is still a mixture of pentane, hexane, heptane and octane. The difference is that the angle α between the first partition 1 and the third partition 3 of the partition tower in this embodiment is 180°, the angle β between the first partition 1 and the second partition 2 is 50°, The angle γ between the second partition 2 and the third partition 3 is 130°.

[0043] The feed rate of the four-component mixture of pentane, hexane, heptane and octane to be separated is 50 kmol / h, and the molar ratio of pentane, hexane, heptane and octane is 1:2:1:1. The output of hexane is 20 kmol / h, and the output of heptane and octane is 10 kmol / h; the top reflux ratio is 7.2, the liquid phase distribution ratio is 0.381, and the vapor phase distribution ratio is 0.8; The condensed water (28 degree of condensed water of 7bar) consumption of condenser is 3250...

Embodiment 3

[0051] The structure of the partition tower in this embodiment is the same as in Embodiment 1, and the four-component mixture to be separated is still a mixture of pentane, hexane, heptane and octane. The difference is that the angle α between the first partition 1 and the third partition 3 of the partition tower in this embodiment is 190°, the angle β between the first partition 1 and the second partition 2 is 50°, The included angle γ between the second partition 2 and the third partition 3 is 120°.

[0052] The feed rate of the four-component mixture of pentane, hexane, heptane and octane to be separated is 60 kmol / h, and the molar ratio of pentane, hexane, heptane and octane is 1:2:2:1. The output of hexane and heptane is 20 kmol / h, and the output of octane is 10 kmol / h; the top reflux ratio is 7.2, the liquid phase distribution ratio is 0.43, and the vapor phase distribution ratio is 0.78; The condensed water (28 degree condensed water of 7bar) consumption of condenser i...

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Abstract

The invention relates to a separation plate tower capable of controlling a gas-phase distribution ratio and used for separating a four-component mixture. The separation plate tower comprises a public rectification section and a public stripping section, wherein the public rectification section is located at a tower top and the tower top is connected with a first condenser; the public stripping section is located at a tower bottom and the tower bottom is connected with a first reboiler; the separation plate tower is characterized in that the public rectification section and the public stripping section are divided into three regions along the tower diameter direction through a first separation plate, a second separation plate and a third separation plate, and the three regions comprise a pre-fractionation column section, a main tower section I and a main tower section II; the pre-fractionation column section is formed by surrounding of the first separation plate, the third separation plate and the outer wall of the separation plate tower and is provided with a feeding hole; the main tower section I is formed by surrounding of the second separation plate, the third separation plate and the outer wall of the separation plate tower; the main tower section I is sealed by the tower bottom and is connected with a second reboiler; the main tower section II is formed by surrounding of the first separation plate, the second separation plate and the outer wall of the separation plate tower; the main tower section II is sealed by the tower top and is connected with a second condenser.

Description

technical field [0001] The invention relates to the field of chemical petroleum rectification and separation, in particular to a partition tower for separating four-component mixtures with a controllable vapor phase distribution ratio. Background technique [0002] In the separation process of oil refining, coal chemical industry, petrochemical industry, fine chemical industry and other industries, the energy consumption of rectification accounts for 50-70% of the energy consumption of the whole process, and there are key problems such as low thermodynamic efficiency, high energy consumption and high investment cost, so the use of Advanced process intensification technology to reduce energy consumption and reduce carbon emissions is extremely important. The next-door distillation column is an upgrade of the traditional multi-tower process, which can greatly (30%-55%) reduce energy consumption and equipment investment, and realize green manufacturing and carbon emission reduc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D3/14B01D3/32B01D3/42C07C7/04C07C9/15
CPCB01D3/141B01D3/143B01D3/32B01D3/42C07C7/04C07C9/15
Inventor 王洪海董立会薛璐璐李晓春王宝正方静李春利
Owner HEBEI UNIV OF TECH
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