The use of a turbulent contactor to absorb a selected gas component from a gas stream. The invention particularly applies to a method of distributing a liquid into a gas stream which comprises providing a liquid to an annulus at the periphery of a pipe in which a gas stream is flowing, the gas flow
The use of a turbulent contactor to absorb a selected gas component from a gas stream. The invention particularly applies to a method of distributing a liquid into a gas stream which comprises providing a liquid to an annulus at the periphery of a pipe in which a gas stream is flowing, the gas flow drawing the liquid into a film along the inner surface of the pipe to a sharp edge at the end of the pipe at which point the liquid breaks off the surface of the pipe and mixes intimately with the gas.
대표청구항▼
The invention claimed is: 1. A method of distributing a liquid into a gas stream which comprises providing a first contactor having a pipe in which a gas stream is flowing and providing a liquid to the pipe in which the gas stream is flowing, the gas flow drawing the liquid into a film along the in
The invention claimed is: 1. A method of distributing a liquid into a gas stream which comprises providing a first contactor having a pipe in which a gas stream is flowing and providing a liquid to the pipe in which the gas stream is flowing, the gas flow drawing the liquid into a film along the inner surface of the pipe to a sharp edge at the end of the pipe at which point the liquid breaks off the surface of the pipe and mixes intimately with the gas, wherein the liquid is introduced through a passage to the inner surface of the pipe in the form of an annulus around a circumference of the inner surface of the pipe, and wherein a pressure across the passage is controlled to enable distribution of the liquid in the film around said circumference. 2. A method as claimed in claim 1, in which the method is carried out as a continuous process with the gas and liquid flowing co-currently. 3. A method as claimed in claim 1, in which the pipe section upstream from the reaction zone in which the gas stream is flowing is a converging pipe section which accelerates the gas as it passes the annulus of liquid. 4. A method as claimed in claim 1, in which the method further includes the step of separating a gas phase and a liquid phase after the turbulent mixing. 5. A method as claimed in claim 4, in which the mixture is cooled prior to separation into a gas phase and a liquid phase. 6. A method as claimed in claim 4, in which the liquid phase is subsequently treated to remove any absorbed gas component. 7. A method as claimed in claim 6, in which the treatment is carried out by heating and/or by flashing of the absorbed gas component in a flash tank. 8. A method as claimed in claim 7, in which the post mixing cooling and the regenerative heating are achieved, at least in part, by mutual heat exchange. 9. A method as claimed in claim 6, in which the treated liquid is recycled to the liquid feed to the pipe. 10. A method as claimed in claim 4, in which the liquid phase is recycled (without treatment) to the liquid feed to the pipe. 11. A method as claimed in claim 1, in which the gas stream is a mixture from which one or more selected components are removed using one or more solvents or reagents. 12. A method as claimed in claim 11, in which the gas mixture includes one or more acid gas components. 13. A method as claimed in claim 1, in which the gas stream is a single gas which is absorbed. 14. A method as claimed in claim 1, in which there is a diverging section of pipe after the reaction zone to expand the gas. 15. A method as claimed in claim 1, in which a second contactor is placed in series with the first contactor. 16. A method as claimed in claim 15, in which there is a further supply of liquid to the second contactor. 17. Apparatus for distributing a liquid into a gas stream comprising a turbulent contactor having a contracting pipe section through which a gas stream flows, a passage, a sharp edge at the end of the contracting pipe section and a further pipe section downstream of the sharp edge, wherein the passage is arranged to introduce an annulus of liquid through the passage around the internal perimeter of the contracting pipe section, wherein a pressure at the passage is controlled to enable distribution of the annulus of liquid in a film around the internal perimeter, wherein the prior art reference 769,821 to Aktiebolaget Svenska Flaktfabiken disclose liquid introduction though inlet 3 in spray pattern but not through a passage which is controlled to enable of distribution of liquid in the film around an inner circumference of a pipe. 18. Apparatus as claimed in claim 17, in which there is a diverging section downstream of the sharp edge. 19. Apparatus as claimed in claim 17, in which the sharp edge is substantially a right angle. 20. Apparatus as claimed in claim 17, in which the gas stream and the liquid are formed into a homogenous mixture in the contactor. 21. A method for absorbing a selected gas component from a gas stream by bringing the gas stream into contact with liquid including a solvent or a reagent for the selected gas component using a turbulent contactor having a contracting pipe section through which a gas stream flows, a passage arranged to introduce an annulus of liquid through the passage around the internal perimeter of the pipe, wherein a pressure at the passage is controlled to enable distribution of the liquid in a film around the internal perimeter, and a sharp edge at the end of the contracting pipe and a further pipe section downstream of the sharp edge. 22. The method of claim 21, wherein H2S is scavenged from natural gas. 23. The method of claim 21, wherein H2S is selectively removed from a natural gas in preference to CO2. 24. The method of claim 21 wherein a plurality of acid gas components are simultaneously removed from a natural gas stream. 25. The method of claim 21 wherein existing columns are used in combination with said turbulent contactor to adapt an existing plant to accommodate a change in the feed conditions. 26. The method of claim 21 wherein water is de-oxygenised. 27. The method of claim 21 wherein natural gas is dehydrated.
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Cullinane, John T; Grave, Edward J; Northrop, Paul S., In-line device for gas-liquid contacting, and gas processing facility employing co-current contactors.
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