Abstract

d).

IPC Classes  ?

• B01D 19/00 - Degasification of liquids
• C02F 1/20 - Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases

Abstract

The invention relates to a separation pump (1) for pumping a fluid mixture (2) of gas (3) and liquid or suspension (4) and for separating gas (3) and liquid or suspension (4) from each other. The separation pump (1) comprising a rotatable drum means (10) for rotating fluid mixture (2). The rotatable drum means (10) having an inner wall (11) and an inner space (12). The rotatable drum means (10) being rotatable for causing liquid or suspension (4) of fluid mixture (2) to form a layer of liquid or suspension (4) on the inner wall (11) and for causing gas (3) of the fluid mixture (2) to migrate towards the axis of rotation (13). The separation pump comprises foam discharging means (15) for discharging foam (16) from the inner space (12) of the rotatable drum means (10). The foam discharging means (15) comprises a second outlet (17).

IPC Classes  ?

• B01D 19/00 - Degasification of liquids
• D21D 5/26 - De-aeration of paper stock
• F04D 7/04 - Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogeneous

Abstract

The invention relates to an arrangement for gas removal including a vertical cylindrical vessel (1) having an outlet (8) and a tangentially arranged inlet (6). The inlet includes means which bring an incoming fluid (4) into a jet which is sharply delimited in the radial direction and runs close to the vessel's (1) inner surface (5) at such a high initial velocity that an upwards open whirlpool (12) comprising a curved fluid surface (11) is formed. The outlet (8) is arranged tangentially at a level which is below the fluid surface (11). The invention also relates to a method for degassing a process fluid, wherein a deep whirlpool (12) including a curved fluid surface (11) is formed in a cylindrical vessel. At said fluid surface gas is brought to escape by means of centrifugal forces acting within the fluid. The invention further relates to the use of the above arrangement and method, respectively, for deaerating a process fluid in paper- or cellulose making.

IPC Classes  ?

• B01D 19/00 - Degasification of liquids