Curing Cementitious Products

Patent metadata

Field	Value
Publication number	US-2021114943-A1
Application number	US-201916696952-A
Country	US
Kind code	A1
Filing date	Nov 26, 2019
Priority date	Oct 16, 2019
Publication date	Apr 22, 2021
Grant date	—

Abstract

Systems and method for curing cementitious products are provided herein. In an example, a pressurized water saturator is used to create a CO2/H2O stream. The pressurized water saturator includes a carbon dioxide injection line disposed below a water level in the pressurized water saturator, an exit line disposed above the water level in the pressurized water saturator, and a pressure controller configured to hold a positive pressure of carbon dioxide in the pressurized water saturator.

First claim

What is claimed is:

1 . A method for curing a precast shape, comprising:
injecting a carbon dioxide (CO 2 ) stream into a pressurized water saturator; removing a carbon dioxide/water (CO 2 /H 2 O) stream from the pressurized water saturator; and flowing the CO 2 /H 2 O stream from the pressurized water saturator into a curing chamber.

2 . The method of claim 1 , wherein the CO 2 /H 2 O stream is removed from the pressurized water saturator as a gaseous stream.

3 . The method of claim 1 , wherein the CO 2 /H 2 O stream is removed from the pressurized water saturator as a liquid stream.

4 . The method of claim 3 , wherein the CO 2 /H 2 O stream is sprayed over the precast shape in the curing chamber.

5 . The method of claim 1 , comprising flowing a sidestream of carbon dioxide into the curing chamber.

6 . The method of claim 1 , comprising controlling a pressure of the pressurized water saturator.

7 . The method of claim 1 , comprising controlling a temperature of the pressurized water saturator.

8 . The method of claim 1 , comprising controlling a flow rate of CO 2 into the pressurized water saturator.

9 . The method of claim 1 , comprising controlling a pressure of the curing chamber.

10 . The method of claim 1 , comprising controlling humidity in the curing chamber.

11 . An apparatus for curing a precast cementitious product, comprising:
a pressurized water saturator, comprising:
a carbon dioxide injection line disposed below a water level in the pressurized water saturator;
an exit line disposed in the pressurized water saturator; and
a pressure controller configured to hold a positive pressure of carbon dioxide in the pressurized water saturator; and
a curing chamber coupled to the exit line of the pressurized water saturator.

12 . The apparatus of claim 11 , comprising a carbon dioxide line coupled directly to the curing chamber.

13 . The apparatus of claim 11 , comprising a heater on the pressurized water saturator configured to maintain a temperature.

14 . The apparatus of claim 13 , wherein the heater comprises a steam jacket around the pressurized water saturator.

15 . The apparatus of claim 11 , comprising a level controller in the pressurized water saturator configured to maintain the water level in the pressurized water saturator.

16 . The apparatus of claim 11 , where the curing chamber comprises a pressure vessel.

17 . The apparatus of claim 16 , wherein the pressure vessel comprises the pressure controller.

18 . A pressurized water saturator for creating a CO 2 /H 2 O stream, comprising:
a carbon dioxide injection line disposed below a water level in the pressurized water saturator; an exit line disposed above the water level in the pressurized water saturator; and a pressure controller configured to hold a positive pressure of carbon dioxide in the pressurized water saturator.

19 . The pressurized water saturator of claim 18 , wherein the CO 2 /H 2 O stream is a liquid stream comprising CO 2 dissolved in H 2 O.

20 . The pressurized water saturator of claim 18 , wherein the CO 2 /H 2 O stream is a gaseous stream comprising CO 2 saturated with water vapor.

21 . The pressurized water saturator of claim 18 wherein the exit line is coupled to a cement mixer, and wherein the exit line is configured to inject the CO 2 /H 2 O stream into the cement mix in the cement mixer.

Assignees

• Saudi Arabian Oil Co

Inventors

• Amr Issam T
• Hammad Ahmad D
• Fadhel Bandar

Classifications

• C04B40/0091

  Processes of mixing characterised by carbon dioxide treatment · CPC title

• C04B2111/00019

  Carbon dioxide sequestration · CPC title

• C04B40/0231 Primary

  Carbon dioxide hardening · CPC title

• C04B22/103

  Acids; Carbonic acids, e.g. from carbon dioxide · CPC title

• C04B20/0232

  with carbon dioxide · CPC title