Divided-wall column

Patent metadata

Field	Value
Publication number	US-10005002-B2
Application number	US-201415031377-A
Country	US
Kind code	B2
Filing date	Oct 21, 2014
Priority date	Oct 23, 2013
Publication date	Jun 26, 2018
Grant date	Jun 26, 2018

Abstract

A dividing wall column ( 10 ), comprising: a partition plate ( 11 ) arranged along an axial direction of the dividing wall column ( 10 ); a first shaft ( 22 ) arranged along a radial direction of the dividing wall column ( 10 ), and a first splitter plate ( 23 ) with an end connected to the first shaft ( 22 ), which are both placed beneath the partition plate ( 11 ), wherein the first splitter plate ( 23 ) is configured to be pivotable around the first shaft ( 22 ), so as to control distribution of a stream from below the first splitter plate ( 23 ) into spaces formed at two sides of the partition plate ( 11 ); and a second shaft ( 13 ) arranged along the radial direction of the dividing wall column ( 10 ), and a second splitter plate ( 20 ) with an end connected to the second shaft ( 13 ), which are both placed above the partition plate ( 11 ), wherein the second splitter plate ( 20 ) is configured to be pivotable around the second shaft ( 13 ), so as to control the stream from above the second liquid splitter plate ( 20 ) into the spaces formed at two sides of the partition plate ( 11 ).

First claim

The invention claimed is:

1. A dividing wall-column, comprising:
a partition plate arranged along an axial direction of the dividing wall column; and
a first shaft arranged along a radial direction of the dividing wall column, and a first splitter plate having an end connected to the first shaft, wherein the first shaft and the first splitter are disposed in a same axial plane in the dividing wall column, and the first shaft and the first splitter are disposed beneath the partition plate, wherein the first splitter plate is configured to be pivotable around the first shaft, so as to control distribution of a stream from below the first splitter plate into spaces formed at two sides of the partition plate,
wherein the dividing wall column has a circular cross section, and the first splitter plate is in a shape of a circular segment,
wherein a first space on a first side of the partition plate and a second space on a second side of the partition plate have a same cross-sectional area, and
wherein a length of a chord of the circular segment equals an inner diameter of the dividing wall column and a vertical distance from a top of the circular segment of the first splitter plate to the chord is shorter than a distance from a center of the dividing wall column to an inner wall of the dividing wall column.

2. The dividing wall column according to claim 1 , wherein the first shaft is configured to drive the first splitter plate to rotate.

3. The dividing wall column according to claim 1 , wherein the first splitter plate is configured to rotate between a first position, at which the first splitter plate impedes the stream from below the first splitter plate from entering the space formed at the first side of the partition plate, and a second position at which the first splitter plate impedes the stream from below the first splitter plate from entering the space formed at the second side of the partition plate.

4. The dividing wall column according to claim 1 ,
wherein the first shaft has one end supported on an inner wall of a column, and another end connected to a rotation controller disposed outside the dividing wall column.

5. The dividing wall column according to claim 4 ,
wherein the first shaft is placed beneath the partition plate and forms a seamless rolling contact with the partition plate.

6. The dividing wall column according to claim 5 , wherein the dividing wall column further comprises one or more baffle plates arranged on the inner wall of the dividing wall column in the first space and the second space adjacent to a bottom of the partition plate.

7. The dividing wall column according to claim 6 , wherein each of the one or more baffle plates is in a shape of a circular segment and has a tilt angle in the range from 5° to 20° with respect to a circumferential plane of the dividing wall column.

8. The dividing wall column according to claim 6 , wherein each of the one or more baffle plates is symmetrically arranged with respect to the partition plate.

9. The dividing wall column according to claim 6 , wherein a vertical distance from a vertex of an arcuate edge of each of the one or more baffle plates to the bottom of the partition plate is in the range from 50 mm to 400 mm.

10. The dividing wall column according to claim 6 , wherein the dividing wall column further comprises one or more velocity probes, respectively arranged on the inner wall of the dividing wall column in the first space and the second space below the one or more baffle plates and above the first shaft.

11. The dividing wall column according to claim 1 , further comprising a second shaft arranged along the radial direction of the dividing wall column, and a second splitter plate having an end connected to the second shaft, which are both placed above the partition plate, wherein the second splitter plate is configured to be pivotable around the second shaft, so as to control distribution of a stream from above the second splitter plate into the spaces formed at two sides of the partition plate.

12. The dividing wall column according to claim 11 , wherein the second shaft is configured to drive the second splitter plate to rotate.

13. The dividing wall column according to claim 11 , wherein the second splitter plate is configured to rotate between a third position and a fourth position, wherein at the third position the second splitter plate impedes the stream from above the second splitter plate from entering the first space, and at the fourth position the second splitter plate impedes the stream from above the second splitter plate from entering the second space.

14. The dividing wall column according to claim 11 , wherein the partition plate and the second shaft are located in a same axial plane of the dividing wall column.

15. The dividing wall column according to claim 14 , wherein the second splitter plate is in a shape of a circular segment.

16. The dividing wall column according to claim 15 ,
wherein the circular segment of the second splitter plate has a chord having a length equaling the inner diameter of the dividing wall column; and
wherein a vertical distance from a top of the circular segment of the second splitter plate to the chord of the circular segment of the second splitter plate is shorter than the distance from the center of the dividing wall column to the inner wall of the dividing wall column.

17. The dividing wall column according to claim 14 ,
wherein the second shaft has one end supported on an inner wall of the column, and another end connected to a rotation controller disposed outside the dividing wall column.

Assignees

• China Petroleum & Chem Corp
• Fushun Res Institute Of Petroleum And Petrochemicals Sinopec Corp

Inventors

• Gao Jingshan
• Yang Xiuna
• Bo Dechen
• Zhang Shengzhong
• Liao Changjian

Classifications

• B01D3/008

  Liquid distribution · CPC title

• B01D3/141 Primary

  where at least one distillation column contains at least one dividing wall · CPC title

• B01D3/32

  Other features of fractionating columns {; Constructional details of fractionating columns not provided for in groups B01D3/16 - B01D3/30} · CPC title