Hollow thread film cartridge, hollow thread film module using the cartridge, and tank type filter

• US 20040045893A1
• Filed: 01/09/2003
• Published: 03/11/2004
• Est. Priority Date: 07/10/2000
• Status: Active Grant

• Current Assignee: Asahi Kasei Kabushiki Kaisha (Asahi Kasei Corporation)
• Original Assignee: Asahi Kasei Kabushiki Kaisha (Asahi Kasei Corporation)
• Inventors: Ishibashi, Yuzuru, Hamanaka, Katsuhiko, Watanabe, Akihiro
• Granted Patent: US 7,083,726 B2
• Time in Patent Office: Days
• US Class Current: 210/321.79
• CPC Class Codes: B01D 2321/04 Backflushing
• CPC Class Codes: B01D 2321/185 Aeration
• CPC Class Codes: B01D 2321/2058 by vibration of the membrane, e.g. with an actuator
• CPC Class Codes: B01D 2323/08 Specific temperatures applied
• CPC Class Codes: B01D 2323/12 Specific ratios of components used
• CPC Class Codes: B01D 63/043 with separate tube sheets
• CPC Class Codes: B01D 63/16 Rotary, reciprocated or vibrated modules
• CPC Class Codes: B01D 65/08 Prevention of membrane fouling or of concentration polarisation
• CPC Class Codes: B01D 67/0027 by stretching
• CPC Class Codes: B01D 67/0083 Thermal after-treatment
• CPC Class Codes: B01D 67/0086 Mechanical after-treatment
• CPC Class Codes: B01D 67/0088 Physical treatment with compounds, e.g. swelling, coating or impregnation
• CPC Class Codes: B01D 69/00 Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
• CPC Class Codes: B01D 69/08 Hollow fibre membranes manufacture of hollow fibres D01D5/24, D01F1/08
• CPC Class Codes: B01D 69/084 Undulated fibres
• CPC Class Codes: B01D 69/088 Co-extrusion; Co-spinning
• CPC Class Codes: B01D 71/34 Polyvinylidene fluoride
• CPC Class Codes: C02F 1/444 by ultrafiltration or microfiltration
• CPC Class Codes: D01D 5/24 with a hollow structure; Spinnerette packs therefor D01D5/38 takes precedence; producing tubes of plastic material B29D; addition of agents forming hollow filaments D01F1/08
• CPC Class Codes: D01F 6/48 of polymers of halogenated hydrocarbons

Abstract

A hollow fiber membrane cartridge wherein a cartridge head and a bottom ring are connected and fixed to each other by means of a plurality of rods or pipes, the hollow portion at the end of each hollow fiber membrane on the cartridge head side is open, the hollow portion at the end of each hollow fiber membrane on the bottom ring side is sealed, and a plurality of through-holes are provided in an adhesion and fixation layer on the bottom ring side and are located in a bundle of the hollow fiber membranes.

Claims

1. A hollow fiber membrane cartridge comprising a bundle of a plurality of hollow fiber membranes, both ends of which are fixed by adhesion in adhesion and fixation layers, respectively, a cartridge head fixed at periphery of the bundle at one end so as not to permit passage of liquid either in or out, and a bottom ring fixed at periphery of the bundle at the other end so as not to permit passage of liquid either in or out, which is characterized in that said cartridge head and said bottom ring are connected and fixed to a plurality of rods or pipes, the hollow portion at the end of each hollow fiber membrane on the cartridge head side is open, the hollow portion at the end of each hollow fiber membrane on the bottom ring side is sealed, and a plurality of through-holes are provided in the adhesion and fixation layer on the bottom ring side and are located in the bundle of the hollow fiber membranes.

2. A hollow fiber membrane cartridge according to claim 1, wherein the end of said bottom ring juts out beyond the ends of the hollow fiber membranes.

3. A hollow fiber membrane cartridge according to claim 1 or claim 2, wherein said cartridge head has a collar at its periphery.

4. A hollow fiber membrane cartridge according to any one of claims 1 to 3, wherein at least one of said rods or pipes is located near the periphery of the bundle of the hollow fiber membranes.

5. A hollow fiber membrane cartridge according to claim 4, wherein said rods or pipes are connected and fixed to said cartridge head and said bottom ring by adhesion to them together with the hollow fiber membranes in the adhesion and fixation layers.

6. A hollow fiber membrane cartridge according to any one of claims 1 to 5, wherein the hollow fiber membranes have waves.

7. A hollow fiber membrane cartridge according to any one of claims 1 to 6, wherein the modulus in tension of the hollow fiber membrane is less than 90 MPa and not less than 10 MPa.

8. A hollow fiber membrane cartridge according to claim 7, wherein the modulus in tension of the hollow fiber membrane is not more than 70 MPa and not less than 10 MPa.

9. A hollow fiber membrane cartridge according to any one of claims 1 to 8, wherein the hollow fiber membranes are in a slacked state and the rate of slacking is not more than 10% and not less than 0.1%.

10. A hollow fiber membrane cartridge according to any one of claims 1 to 9, wherein the plurality of said through-holes provided in the adhesion and fixation layer on the bottom ring side are located so that the hollow fiber membranes are present among the through-holes.

11. A hollow fiber membrane cartridge according to any one of claims 1 to 10, wherein said plurality of through-holes provided in the adhesion and fixation layer on the bottom ring side have an inside diameter of 2 to 30 mm.

12. A hollow fiber membrane cartridge according to any one of claims 1 to 11, wherein an adhesive constituting said adhesion and fixation layers is a urethane resin having such a characteristic that its hardness is 70D to 30D in a working temperature range.

13. A module for rack type filtration apparatus using a hollow fiber membrane cartridge according to any one of claims 1 to 12.

14. A tank type filtration apparatus using a hollow fiber membrane cartridge according to any one of claims 1 to 12.

15. A tank type filtration apparatus according to claim 14, wherein said hollow fiber membrane cartridge is supported in a suspended state.