초록 ▼

A process and apparatus for pumping a fluid mixture of a gas and a liquid and for separating said gas and liquid from each other, said apparatus having a fluid inlet (14) at one end (18) and at the opposite end (22) a pump housing (16) with a liquid outlet (28) and, between said inlet (14) and said

A process and apparatus for pumping a fluid mixture of a gas and a liquid and for separating said gas and liquid from each other, said apparatus having a fluid inlet (14) at one end (18) and at the opposite end (22) a pump housing (16) with a liquid outlet (28) and, between said inlet (14) and said pump housing (16), a hollow elongated gas separation part (30) of an essentially circular cross section with a generally central outlet (26) for separated gas. Said gas separation part (30) is provided by a hollow rotor (12) between said inlet (14) and said pump housing (16), the inner wall of said rotor (12) providing a large rotatable gas separation surface (32). The diameter of said rotor (12) increases at said opposite end (22) of the apparatus to form a larger diameter pumping zone (17) extending into said pump housing (16). Said rotor (12) is provided with a blade wheel (24) extending into said pump housing (16). The apparatus is especially well suited for the gas-free re-cycling of backwater drained through a forming fabric in a papermaking process. The invention is also applicable to the removal of air from fluid materials separated by flotation.

대표청구항 ▼

[ What is claimed is:] [10.] A process for pumping a fluid mixture of a gas and a liquid so that said gas and said liquid separate from each other, characterized by the steps offeeding said fluid mixture into the inlet of a gas separation pump having a hollow rotatable gas separation part with a cir

[ What is claimed is:] [10.] A process for pumping a fluid mixture of a gas and a liquid so that said gas and said liquid separate from each other, characterized by the steps offeeding said fluid mixture into the inlet of a gas separation pump having a hollow rotatable gas separation part with a circular cross-section;bringing said mixture into rotation at the inlet end of said gas separation pump for causing said mixture to flow towards the wall thereof;maintaining said mixture in rotation by rotating said gas separation part;causing said mixture to flow along a rotating gas separation surface formed by the wall of said gas separation part to form a fluid layer on said gas separation surface;maintaining said flow on said rotating gas separation surface for a sufficient time to allow said gas to separate from said liquid or liquid suspension and to form a gas column at the center of said gas separation part;causing said separated liquid or liquid suspension to flow along said rotating gas separation surface into a stationary pump housing having a pumping zone with a diameter larger than said gas separation part and causing said liquid to form a rotating liquid ring in said pumping zone; anddischarging said liquid from said pump housing and discharging said gas from said gas column.