Column for thermal treatment of fluid mixtures

Patent metadata

Field	Value
Publication number	US-10413841-B2
Application number	US-201514816485-A
Country	US
Kind code	B2
Filing date	Aug 3, 2015
Priority date	Aug 5, 2014
Publication date	Sep 17, 2019
Grant date	Sep 17, 2019

Abstract

The present invention relates to a column (1) for thermal treatment of fluid mixtures, having a cylindrical, vertical column body (2) which forms a column cavity (3), a plurality of trays (8) mounted with vertical spacing in the column cavity (3), and a support construction (9) which supports at least one of the trays (8) in vertical direction. It is a characteristic feature of the inventive column (1) that the support construction (9) has a plurality of orifices (12) which allow horizontal mass transfer through the support construction (9). The invention further relates to a tray device for such a column and to a thermal separation process between at least one gas ascending within such a column (1) and at least one liquid descending within the column (1).

First claim

The invention claimed is:

1. A column for thermal treatment of fluid mixtures, comprising
a cylindrical, vertical column body which forms a column cavity,
a plurality of trays mounted with vertical spacing in the column cavity, wherein each tray concludes flush with a wall of the column, and
a support construction which supports at least one of the trays in a vertical direction,
wherein:
the support construction has a plurality of orifices, wherein the orifices allow horizontal mass transfer through the support construction;
the orifices are arranged in at least two horizontal rows with vertical spacing, wherein at least two orifices are arranged one on top of another with vertical spacing; and
the support construction rests on a tray and supports a tray arranged above from beneath.

2. The column according to claim 1 , wherein in a vertical section through the support construction the orifices take up a proportion of the sectional area of the support construction within a range from 30% to 90%.

3. The column according to claim 1 , wherein in a vertical section through the support construction the orifices take up a proportion of the sectional area of the support construction within a range from 40% to 80%.

4. The column according to claim 1 , wherein the support construction has at least one support, and the orifices are formed in a vertical wall face of the at least one support.

5. The column according to claim 4 , wherein the height of the at least one support corresponds to the vertical spacing of adjacent trays, such that the at least one support is arranged between adjacent trays.

6. The column according to claim 1 , wherein the support construction has a plurality of supports and the orifices are formed in vertical wall faces of the plural supports.

7. The column according to claim 6 , wherein the height of the plural supports corresponds to the vertical spacing of adjacent trays, such that the plural supports are arranged between adjacent trays.

8. The column according to claim 1 , wherein, in at least a portion of the orifices, the lower boundary edge of the orifice is formed by the tray on which the support construction rests, or an element is formed, such that this portion of the orifices allows essentially unhindered horizontal mass transfer along the plane of this tray through the orifices.

9. The column according to claim 1 , wherein the support construction has at least one support comprising an upper horizontal limb, a vertical limb and a lower horizontal limb, the upper horizontal limb supporting an upper tray, the vertical limb passing through a lower tray, and the lower tray being supported from beneath by the lower horizontal limb.

10. The column according to claim 1 , wherein the orifices of the two horizontal rows are arranged with a horizontal offset from one another.

11. The column according to claim 1 , wherein the orifices have a honeycomb structure.

12. The column according to claim 1 , wherein at least some of the orifices are hexagonal.

13. The column according to claim 1 , wherein the horizontal maximum extent of the column body is greater than 5 m.

14. A tray device for a column for thermal treatment of fluid mixtures, comprising a tray for arrangement in a column cavity of a column and a support construction for the tray having a plurality of orifices which allow mass transfer through the support construction parallel to the tray,
wherein:
the orifices are arranged in at least two horizontal rows with vertical spacing, wherein at least two orifices are arranged one on top of another with vertical spacing; and
the support construction rests on a tray and supports a tray arranged above from beneath.

Assignees

• Basf Se

Inventors

• Hammon Ulrich
• Walter Thomas

Classifications

• B01D3/324 Primary

  Tray constructions · CPC title

• B01D3/326 Primary

  Tray supports · CPC title

• B01D3/26

  Fractionating columns in which vapour and liquid flow past each other, or in which the fluid is sprayed into the vapour, or in which a two-phase mixture is passed in one direction · CPC title

• C07C51/44

  by distillation · CPC title