Process and device for treating a waste lye

Patent metadata

Field	Value
Publication number	US-11834356-B2
Application number	US-201917051124-A
Country	US
Kind code	B2
Filing date	Apr 26, 2019
Priority date	Apr 27, 2018
Publication date	Dec 5, 2023
Grant date	Dec 5, 2023

Abstract

The invention relates to a process for treating a waste lye of a lye scrub using an oxidation reactor ( 100 ), the waste lye and oxygen or an oxygen-containing gas mixture being introduced into the oxidation reactor ( 100 ) and steam being introduced into the oxidation reactor ( 100 ). It is provided that the steam is at least partially introduced by means of a steam feeding device ( 10 ), which has a cylindrical section ( 11 ) with a centre axis ( 12 ) and a wall ( 13 ), the centre axis ( 12 ) being aligned perpendicularly, a number of groups of openings ( 14 ) being formed in the wall, each of the groups comprising a number of the openings ( 14 ), and the number of openings ( 14 ) of each of the groups being arranged in one or more planes ( 15 ) that is or are in each case aligned perpendicularly to the centre axis ( 12 ). A corresponding installation and also a corresponding oxidation reactor ( 100 ) are likewise the subject of the present invention.

First claim

The invention claimed is:

1. A process for treating a waste lye obtained in a lye scrub by using an oxidation reactor ( 100 ), wherein the waste lye together with oxygen or an oxygen-containing gas mixture is introduced into the oxidation reactor ( 100 ) and steam is also introduced into the oxidation reactor ( 100 ),
wherein the steam is at least partially introduced by means of a steam feeding device ( 10 ), having a cylindrical section ( 11 ), the cylindrical section having a centre axis ( 12 ) and a wall ( 13 ), the wall having a first end and a second end, wherein the first end points downwards and the cylindrical section ( 11 ) is closed at the first end by an end surface ( 16 ) so that condensate can collect in the cylindrical section ( 11 ) by condensation of the steam, the centre axis ( 12 ) aligned vertically, and
wherein a number of groups of openings ( 14 ) are formed in the wall, each of the groups respectively comprising a number of the openings ( 14 ), and the number of openings ( 14 ) of each of the groups being arranged in one or more planes ( 15 ), wherein each plane is perpendicular to the centre axis ( 12 ).

2. The process according to claim 1 , in which the openings ( 14 ) in each of the planes ( 15 ) are arranged such that they are distributed equidistantly around a circumference defined by a sectional line of the respective plane ( 15 ) with the wall ( 13 ).

3. The process according to claim 1 , in which the openings ( 14 ) in each of the groups are arranged in numbers of planes ( 15 ) and a maximum distance between the planes ( 15 ) in which the openings ( 14 ) of one of the groups lie is smaller than a minimum distance between the planes ( 15 ) in which the openings ( 14 ) of two different groups lie.

4. The process according to claim 1 , in which two, three, four or more of the openings ( 14 ) are arranged in each of the planes ( 15 ).

5. The process according to claim 1 , in which at least one further opening ( 17 ) is formed in the terminating area ( 16 ).

6. The process according to claim 1 , in which the cylindrical section is connected by the second end to a steam supply line ( 18 ) and/or mounting, which extends from the second end of the cylindrical section ( 11 ) to a wall ( 110 ) of the oxidation reactor ( 100 ).

7. The process according to claim 6 , in which the openings ( 14 ) are arranged in such a way that steam respectively flows out from them in an outflow direction that is different from a direction in which the steam supply line ( 18 ) and/or the mounting extends when viewed from the direction of the centre axis ( 12 ).

8. The process according to claim 1 , in which a distance between the second end and a first group of openings ( 14 ) arranged nearest thereto is L, where L is greater than or equal to 15 mm.

9. The process according to claim 8 , in which a distance between at least some of the groups of openings is the same and is L.

10. The process according to claim 9 , in which a distance between the first group of openings and a second group of openings following this first group in the direction of the first end is 1.5 times L.

11. The process according to claim 1 , in which a distance between the first end and a group of openings ( 14 ) arranged nearest thereto is greater than M, where M corresponds to 1.5 times a diameter of the openings ( 14 ).

12. The process according to claim 1 , in which the openings ( 14 ) are surrounded by steam conducting structures, which define an outflow direction which corresponds to a radial direction starting from the centre axis in the respective plane or is inclined by up to 30° with respect to it.

Assignees

• Linde Gmbh

Inventors

• Wellenhofer Anton
• Zander Jörg
• Ananieva Ekaterina
• Hairer Florian
• Baus Michael
• Schubert Martin

Classifications

• C02F1/727 Primary

  using pure oxygen or oxygen rich gas · CPC title

• C02F1/74

  with air (aeration of stretches of water C02F7/00) · CPC title

• C02F11/08

  Wet air oxidation · CPC title

• C02F2101/101

  Sulfur compounds · CPC title

• C02F2103/18

  from the purification of gaseous effluents · CPC title