Method for mixing gas-free liquid oxidant with process liquid

Patent metadata

Field	Value
Publication number	US-12312264-B2
Application number	US-202117366389-A
Country	US
Kind code	B2
Filing date	Jul 2, 2021
Priority date	Mar 28, 2018
Publication date	May 27, 2025
Grant date	May 27, 2025

Abstract

Disclosed are systems and methods for mixing a gas-free liquid oxidant with a process liquid to form a homogeneous and gas-free mixture with minimized degassing. The mixing system comprises an injection device, integrating with a pipe through which a process liquid flows, configured and adapted to inject a gas-free liquid oxidant into the process liquid, and a mixer, fluidly connected to the pipe and the injection device, configured and adapted to mix the process liquid and the gas-free liquid oxidant therein to form a homogeneous and gas-free mixture of the process liquid and the gas-free liquid oxidant with minimal degassing. The method comprises the steps of a) injecting the gas-free liquid oxidant into the process liquid, and b) mixing the gas-free liquid oxidant and the process liquid to form the homogeneous and gas-free mixture. The gas-free liquid oxidant is ozone strong water.

First claim

What is claimed is:

1. A method for mixing an ozone strong water with a process liquid to form a homogeneous and gas-free mixture of the ozone strong water and the process liquid with minimized degassing, the method comprising the steps of:
a) maintaining a pressure of the ozone strong water until the ozone strong water is injected into a main flow of the process liquid;
b) injecting the ozone strong water into the main flow of the process liquid via one more spray nozzles oriented in a direction parallel to the direction of the main flow of the process liquid to rapidly dilute the ozone strong water in the process liquid, thereby avoiding degassing,
wherein the ozone strong water is a pressurized gas-free high concentrated or saturated or close to saturated ozonated water, which under atmospheric conditions is supersaturated,
wherein said pressure of the ozone strong water is higher than a pressure of the process liquid; and
c) mixing the diluted ozone strong water and the process liquid to form the homogeneous and gas-free mixture.

2. The method of claim 1 , wherein the step of b) includes the steps of:
adjusting flow rates of the ozone strong water and the process liquid, respectively, to control a mixing ratio between the process liquid and the ozone strong water.

3. The method of claim 2 , wherein the flow rate of the ozone strong water varies within a range from 20% to 100% of a nominal design flow rate of equipment for the ozone strong water.

4. The method of claim 2 , wherein the flow rate of the process liquid varies within a range from 50% to 100% of a nominal design flow rate of equipment for the process liquid.

5. The method of claim 2 , wherein the mixing ratio between the ozone strong water and the process liquid is controlled by a feed-forward control or a closed-loop control.

6. The method of claim 2 , wherein the mixing ratio between the ozone strong water and the process liquid ranges between 5:1 to 50:1.

7. The method of claim 1 , wherein a concentration of ozone dissolved in water in the ozone strong water is greater than approximately 150 mg/L.

8. The method of claim 1 , wherein a concentration of ozone dissolved in water in the ozone strong water is up to approximately 300 mg/L.

9. The method of claim 1 , wherein a concentration of ozone dissolved in water in the ozone strong water ranges from approximately 150 mg/L to approximately 300 mg/L.

10. The method of claim 1 , wherein the pressure of the ozone strong water ranges between 3 barg and 10 barg.

11. The method of claim 1 , wherein a pressure of the process liquid ranges between 0.1 barg and 1.6 barg.

12. The method of claim 1 , wherein the step c) occurs within approximately 0.5 second.

13. A method for mixing a gas-free ozone dissolution with a process liquid to form a homogeneous and gas-free mixture with minimized degassing, the method comprising the steps of:
a) maintaining a pressure of a gas-free liquid oxidant until the gas-free liquid oxidant is injected into a main flow of the process liquid,
wherein the gas-free ozone dissolution is a pressurized gas-free high concentrated or saturated or close to saturated ozonated water, which under atmospheric conditions is supersaturated,
wherein said pressure of the gas-free ozone dissolution is higher than a pressure of the process liquid;
b) injecting the gas-free ozone dissolution into the main flow of the process liquid via one or more spray nozzles oriented in a direction parallel to the direction of the main flow of the process liquid to rapidly dilute the gas-free ozone dissolution in the process liquid, thereby avoiding degassing; and
c) mixing the diluted gas-free ozone dissolution and the process liquid to form the homogeneous and gas-free mixture.

14. The method of claim 13 , wherein the step of b) includes the steps of:
adjusting flow rates of the gas-free ozone dissolution and the process liquid, respectively, to control a mixing ratio between the process liquid and the gas-free ozone dissolution.

15. The method of claim 14 , wherein the mixing ratio between the gas-free ozone dissolution and the process liquid ranges between 5:1 to 50:1.

16. The method of claim 13 , wherein a pressure of the process liquid ranges between 0.1 barg and 1.6 barg.

17. The method of claim 13 , wherein said pressure of the gas-free ozone dissolution ranges between 3 barg and 10 barg.

18. The method of claim 13 , wherein a concentration of dissolved ozone in the gas-free ozone dissolution is greater than approximately 150 mg/L.

19. The method of claim 13 , wherein a concentration of dissolved ozone in the gas-free ozone dissolution ranges from approximately 150 mg/L to approximately 300 mg/L.

20. The method of claim 13 , wherein the step c) occurs within approximately 0.5 second.

Assignees

• Air Liquide
• Air Liquide American
• Air Liquide

Inventors

• Mante Jan
• Rasanayagam Vasuhi
• Joy Midhun

Classifications

• B01F23/237613

  Ozone · CPC title

• B01F23/237612

  Oxygen · CPC title

• B01F23/23

  by introducing gases into liquid media, e.g. for producing aerated liquids · CPC title

• B01F23/19

  Mixing systems, i.e. flow charts or diagrams; Arrangements, e.g. comprising controlling means · CPC title

• C02F2209/001

  Upstream control, i.e. monitoring for predictive control · CPC title