US 7,022,238 B2 · Immersion type membrane filter

Abstract

An immersion type membrane filter apparatus 200 is intended for obtaining filtrate by filtrating a fluid to be processed stored within a storage bath 150 and primarily includes a filtration membrane module 300 and an air bubbles supply device 500 disposed therebelow. The filtration membrane module 300 has numerous tubular membranes 310 having on the inner surfaces thereof the function of filtrating a fluid to be processed packed within a cylindrical housing vessel 301 having a discharge port 303 for filtrate. The tubular membranes 310 are held in an opened state at both the ends of the housing vessel 301. The filtration membrane module 300 is soaked in a fluid to be processed in such a way that the tubular membranes 310 are opened in the vertical direction. When air bubbles are supplied to the filtration membrane module 300 from an air bubbles supply device 500, the fluid to be processed flows through the tubular membranes 310 from the down side upwards to naturally circulate within the storage bath 150. Part of the fluid to be processed is filtrated by passing through the tubular membranes 310 from the inside to the outside. As a result, the filtrate thus obtained flows out via the discharge port 303 to a filtrate discharge pathway 600.

Claims65

Dependent claims

An immersion type membrane filter apparatus for obtaining filtrate by filtrating a fluid to be processed stored in a storage bath, comprising:

a filtration membrane module including a group of tubular membranes containing a plurality of tubular membranes having on the inner surfaces thereof the function of filtrating said fluid to be processed and having a protrusion partially formed on the outer periphery thereof, said group of tubular membranes being disposed within a columnar housing vessel having a discharge port for said filtrate and being supported by both the ends of said housing vessel, said filtration membrane module being capable of being immersed in said fluid to be processed in said storage bath in such a way that said tubular membranes are opened in the vertical direction, and
an air bubbles supply device for supplying air bubbles to said filtration membrane module, disposed beneath said filtration membrane module within said storage bath.

An immersion type filtration membrane module capable of filtrating a fluid to be processed while being kept immersed in said fluid to be processed, comprising:

a columnar housing vessel equipped with a columnar water-collecting tube having fluid-passing holes and an outer column disposed at intervals on the outer periphery of said water-collecting tube,
a group of tubular membranes being placed between said water-collecting tube and said outer column and containing a plurality of tubular membranes having filtration function on the inner surfaces thereof and having a protrusion partially formed on the outer periphery thereof, and
support portions being disposed on both the ends of said housing vessel and holding both the ends of said group of tubular membranes in the direction of the length while opening both the ends of said tubular membranes,
wherein said water-collecting tube has a discharge port for discharging said fluid having passed through said tubular membrane to the outside.

1 more element

Dependencies are inferred from the claim text.

Immersion type membrane filter

Life of this patent

Immersion type membrane filter

Life of this patent

Abstract

Claims65