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US 2009/0213686 A1Published application
Method and Apparatus for Feeding Gaseous or Liquid Fluid into a Medium
AssigneeSulzer Pumpen AG
InventorsToni Heikkilae, Vesa Vikman
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AssigneeSulzer Pumpen AG
InventorsToni Heikkilae, Vesa Vikman
Estimating the term…
The present invention relates to a method of and an apparatus for feeding gaseous or liquid fluid into a medium. The method and apparatus in accordance with the present invention are especially suitable in various fields of industry for mixing gaseous and liquid chemicals and steams into a flow containing at least liquid. The method and apparatus in accordance with the present invention are most preferably suitable for feeding steam into the fiber suspensions of wood processing industry. Most preferably the method and apparatus in accordance with the present invention is used, for example, in such a way that a side flow is taken from a first medium flowing along a suction duct (16) of a centrifugal pump (10), which side flow is recirculated by means of a conduit (18) and into which second medium is fed via a duct (24) in such a way that said side flow and second medium are fed into said first medium flowing in the suction duct (16) prior to taking said side flow from said first medium in view of the main flow direction of said first medium.
A method of mixing a second medium into a first medium, in which method said first medium is allowed to flow along a suction duct (16) into a centrifugal pump (10), where the pressure of the medium is raised and the medium is discharged from the pump (10), characterized in that a side flow is taken from said first medium, which side flow is recirculated and into which second medium is fed in such a manner that said side flow and second medium are fed into said first medium prior to taking said side flow from said first medium in view of the main flow direction of said first medium.
An apparatus for feeding a second medium into a first medium, said apparatus comprising a centrifugal pump (10) with an impeller (12), a volute (14) and a suction duct (16) as well as an inlet conduit (24) for said second medium, characterized in that said suction duct (16, 16′, 16″) and/or a front wall of said volute (14, 14′, 14″, 14″) is provided with a recirculation duct (18, 18′, 18″, 18′″) for a first medium, in which recirculation duct (18, 18′, 18″, 18′″) said inlet conduit (24, 24′, 24″, 24′″) is located.
Dependencies are inferred from the claim text.