Oil-water separation apparatus and drainage system

• US 10,399,868 B2
• Filed: 07/29/2015
• Issued: 09/03/2019
• Est. Priority Date: 07/30/2014
• Status: Active Grant

• Current Assignee: Mitsubishi Materials Corporation, Mitsubishi Materials Electronic Chemicals Co., Ltd. (Mitsubishi Materials Corporation)
• Original Assignee: Mitsubishi Materials Corporation
• Inventors: Sato, Kosei, Fujita, Masato, Uotani, Masakazu, Koshiyama, Hiroshi, Kamiya, Takeshi, Honda, Tsunetoshi, Imai, Hiroyuki, Takano, Daisuke
• Primary Examiner(s): Kim, John
• Application Number:
  US15/329,393
• Publication Number:
  US 20170210643A1
• Time in Patent Office: 1,497 Days
• CPC Class Codes: B01D 17/045 with coalescers
• CPC Class Codes: B01D 17/10 with stationary filtering elements
• CPC Class Codes: B01D 2239/0421 Rendering the filter material hydrophilic
• CPC Class Codes: B01D 2239/0613 Woven
• CPC Class Codes: B01D 2239/0618 Non-woven
• CPC Class Codes: B01D 2239/086 Binders between particles or fibres
• CPC Class Codes: C02F 1/40 Devices for separating or removing fatty or oily substances or similar floating material cleaning or keeping clear the surface of open water from oil or like materials E02B15/04; devices in sewers for separating liquid or solid substances from sewage E03F5/14, e.g. for use in drains leading to the sewer E03F5/16
• CPC Class Codes: C02F 2101/32 Hydrocarbons, e.g. oil
• CPC Class Codes: C02F 2103/32 from the food or foodstuff industry, e.g. brewery waste waters
• CPC Class Codes: C07C 229/06 having only one amino and one carboxyl group bound to the carbon skeleton
• CPC Class Codes: C07C 237/06 having the nitrogen atoms of the carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms
• CPC Class Codes: C07D 211/06 having no double bonds between ring members or between ring members and non-ring members
• CPC Class Codes: C07D 265/30 not condensed with other rings
• CPC Class Codes: C08L 101/00 Compositions of unspecified macromolecular compounds
• CPC Class Codes: C09D 201/00 Coating compositions based on unspecified macromolecular compounds
• CPC Class Codes: C09D 5/16 Antifouling paints; Underwater paints
• CPC Class Codes: C09D 7/40 Additives

Abstract

An oil-water separation apparatus is provided which can easily separate and collect oil from a liquid mixture containing water and oil at low cost.

The oil-water separation apparatus includes an oil-water-separating member configured to separate a liquid mixture containing water and oil into moisture and oil, and a liquid reservoir subdivided into an upper region and a lower region by the oil-water-separating member. The oil-water separation apparatus filters the liquid mixture by gravity. The oil-water-separating member includes a base which includes a channel for the liquid mixture. The oil-water-separating member is formed in the base, and the oil-water-separating member contains a fluorine compound which has an oil-repellency-imparting group and a hydrophilicity-imparting group. A drain port for discharging the moisture is formed in the lower region of the liquid reservoir.

Claims

1. An oil-water separation apparatus, comprising:

an oil-water separation filter medium which includes a base and an oil-water-separating member which is formed on the base and is configured to separate a liquid mixture containing water and oil into moisture and oil,

wherein

the oil-water-separating member contains a fluorine compound which has an oil-repellency-imparting group and a hydrophilicity-imparting group, and

a form of the base is fibrous organic matter, particulate organic matter, fibrous inorganic matter, particulate inorganic matter, a porous medium of organic matter, or a porous medium of inorganic matter,

and wherein

the fluorine compound contains one or more compounds having a structure represented by the following formulas (1) to (4),

2. The oil-water separation apparatus according to claim 1, wherein the oil-water-separating member is bound to the base by an organic binder or an inorganic binder.

3. The oil-water separation apparatus according to claim 1, further comprising:

a liquid reservoir which is subdivided into an upper region and a lower region by the oil-water-separating member,

wherein a water drain port for discharging the moisture is formed in the lower region of the liquid reservoir, and filtering the liquid mixture is performed by gravity.

4. The oil-water separation apparatus according to claim 3, wherein an oil drain port for discharging the oil is formed in the upper region of the liquid reservoir.

5. The oil-water separation apparatus according to claim 1, wherein

the base has a bag shape of which one end side is opened, and is formed from a porous medium which includes at least a channel through which the moisture is allowed to pass.

6. The oil-water separation apparatus according to claim 5, wherein

a support member through which at least the moisture is allowed to pass is disposed on an outer surface side of the oil-water separation filter medium so as to overlap the outer surface side of the oil-water separation filter medium, and

the support member supports the oil-water separation filter medium from the outer surface side.

7. The oil-water separation apparatus according to claim 1, further comprising:

a holding portion for holding the oil-water separation filter medium,

wherein the base is formed from a material including a channel through which at least the moisture passes.

8. The oil-water separation apparatus according to claim 7, wherein

an edge of the base is attachable and detachable to and from the holding portion.

9. The oil-water separation apparatus according to claim 1, wherein,

the base is a bag body, and

the bag body is formed from a material including a channel through which at least the moisture is allowed to pass, and is filled with weights.

10. The oil-water separation apparatus according to claim 9, further comprising:

a drainage net which is extended from one end portion of the bag body, and includes the oil-water-separating member,

wherein the drainage net is formed from a material including a channel through which at least moisture is allowed to pass.

11. The oil-water separation apparatus according to claim 1, wherein,

the base forms a curtain, and has a float for floating the base on a surface of water,

the curtain is attached to a lower portion of the float, and

the curtain is formed from a material including a channel through which at least the moisture is allowed to pass.

12. The oil-water separation apparatus according to claim 1, wherein,

the base is formed from a porous base including multiple pores which penetrate a space between one surface into which the liquid mixture flows, and another surface which faces the one surface,

an opening diameter of the pore is from 0.1 μ

m to 180 μ

m, and

the oil-water-separating member is formed on a surface of the pore.

13. The oil-water separation apparatus according to claim 12, wherein,

the pore is directed from the one surface toward the other surface, and

the opening diameter of the pores is reduced by stages or continuously.

14. The oil-water separation apparatus according to claim 1, wherein

the oil-water separation apparatus constitutes a gathering machine,

at least a preceding-stage reservoir and a subsequent-stage reservoir are arranged in series from an inflow side into which the liquid mixture flows, toward an outflow side by which the moisture obtained by oil-water separation flows out, and

the oil-water separation filter medium is provided so as to be attachable and detachable to and from at least one of the preceding-stage reservoir or the subsequent-stage reservoir.

15. The oil-water separation apparatus according to claim 1, wherein

the base is formed from a fiber assembly,

the oil-water-separating member is formed in the fiber assembly, and

the oil-water separation filter medium is brought into contact with the liquid mixture, so as to cause water droplets to form a liquid film and to flip oil.

16. The oil-water separation apparatus according to claim 15, further comprising:

a coarsening filter which includes a coarsening member configured to be brought into contact with the liquid mixture and to coarsen a water droplet or an oil droplet,

wherein the oil-water separation filter medium is disposed on the subsequent stage side of the coarsening filter.

17. The oil-water separation apparatus according to claim 1, further comprising:

an intake unit configured to take the liquid mixture in;

an oil-water separation unit which includes the oil-water separation filter medium and is configured to separate the liquid mixture into moisture and oil; and

a joint unit configured to connect the intake unit and the oil-water separation unit.

18. The oil-water separation apparatus according to claim 1, further comprising:

a demulsification unit configured to coarsen minute oil droplets dispersed in an oil-water mixed liquid obtained by mixing moisture and oil, and to cause the oil to float on a higher layer of the moisture;

an oil-water separation unit configured to perform oil-water separation of a solution mixture containing oil which is coarsened by the demulsification unit, by using the oil-water separation filter medium; and

a transportation unit configured to transport the solution mixture from the demulsification unit toward the oil-water separation unit.

19. The oil-water separation apparatus according to claim 1, wherein

the oil-water separation filter medium is formed on a surface of the base,

the base is formed from a baglike exterior medium through which the moisture passes, and the oil does not pass, and

a water-absorbent material is accommodated in the exterior medium.

20. The oil-water separation apparatus according to claim 1, further comprising:

a filter layer in which a filtering medium is formed;

the oil-water separation filter medium formed so as to overlap the filter layer; and

a liquid reservoir which accommodates the filter layer and the oil-water separation filter medium,

wherein

the oil-water separation filter medium is formed in a manner such that multiple layers of an oil-water separation medium formed from the base and the oil-water-separating member which is formed around the base are disposed, and

the oil-water separation filter medium filters the liquid mixture by gravity.

21. A drainage system which includes the oil-water separation apparatus according to claim 1, the system comprising:

an oil leakage detector configured to detect leakage of oil into a drainage;

an oil-water separation mechanism configured to separate oil from a liquid mixture in which the oil is contained in the drainage; and

a control unit configured to operate the oil-water separation mechanism, when the oil leakage detector detects leakage of oil into the drainage,

wherein the oil-water separation mechanism includes the oil-water separation apparatus.