US 12,234,159 B2
Method and apparatus for recycling waste water from a grouting process
Flemming Frost Hansen, Glenview, IL (US)
Assigned to Illinois Tool Works Inc., Glenview, IL (US)
Filed by Illinois Tool Works Inc., Glenview, IL (US)
Filed on Mar. 24, 2022, as Appl. No. 17/703,001.
Claims priority of application No. 21166475 (EP), filed on Mar. 31, 2021.
Prior Publication US 2022/0315446 A1, Oct. 6, 2022
Int. Cl. C02F 1/00 (2023.01); B01D 21/00 (2006.01); B01D 29/27 (2006.01); C02F 9/00 (2023.01); C02F 103/36 (2006.01)
CPC C02F 1/00 (2013.01) [B01D 21/0012 (2013.01); B01D 21/003 (2013.01); B01D 29/27 (2013.01); C02F 1/004 (2013.01); C02F 9/00 (2013.01); C02F 2001/007 (2013.01); C02F 2103/365 (2013.01); C02F 2201/002 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method of recycling waste water from an offshore grouting process, the method comprising:
receiving waste water from a grouting equipment cleaning process from the offshore grouting process on a ship or a floating vessel;
passing the waste water from above into a removable liner having the shape of a cone to a first settling tank inner volume of a first settling tank on the ship or the floating vessel, the removable liner in the inner volume being water permeable, the removable liner retaining the sediment and where the sediment is separated from the waste water;
removing in a single step the removable liner and the retained sediment from the first settling to obtain processed water;
removing the processed water from the first settling tank;
sequentially transferring the processed waste water from the first settling tank from above with a pump into at least one additional settling tank; and
re-using the processed water removed from the first settling tank.