JP2001096105A - Oil-water separation apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize an oil-water separation apparatus capable of efficiently electrolyzing waste water. SOLUTION: The main body 12 of a waste water tank 11 is connected to the negative terminal of a control device 30 by a connection cable 23 and a positive electrode 22 is attached to the undersurface of the lid 21 provided to the upper part of a second chamber 17 and connected to the positive terminal of the control device 30 by a connection cable 24. Since the region of waste water to be electrolyzed becomes wide by this constitution, waste can be efficiently electrolyzed. Various bacteria in waste water can be killed by sodium hypochlorite formed by electrolysis and waste water can be deodorized. Further, the inner wall surface of the waste water tank can be washed by hydrogen generated as bubbles from the main body 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil-water separator for separating oil contained in waste water by electrolysis.

[0002]

2. Description of the Related Art In a kitchen in a hotel or a restaurant in a town, oil is often mixed with drainage discharged from the kitchen. Therefore, in order to prevent the oil from flowing along with the drainage, an oil / water separator such as a grease strap is used. It is mandatory to separate and collect oil. FIG. 3 is an explanatory diagram illustrating an example of a conventional oil-water separation device. Drainage from the kitchen flows into the inflow chamber 53 of the drainage tank 51 from the inflow pipe 52,
Food waste, sludge, and the like in drainage are separated and collected by the basket 54. Subsequently, the wastewater flows into the first electrode unit 55, is electrolyzed by the melting electrode 57 connected to the DC power supply 56, further flows into the second electrode unit 58, and is electrolyzed by the melting electrode 59. By these electrolysis, the oil component in the wastewater is separated, and bubbles generated from the positive electrode of each dissolving electrode cause food debris to float. Then, the waste water that has undergone the electrolysis flows out of the outflow pipe 60.

[0003]

However, the conventional oil / water separator 50 has a configuration in which the wastewater is electrolyzed at two electrode portions provided inside the drainage tank 51, so that an area where the electrolysis can be performed is limited. Since it is limited, there is a problem that wastewater cannot be electrolyzed efficiently.

The present invention has been made to solve the above problems, and has as its object to realize an oil-water separator capable of efficiently electrolyzing waste water.

[0005]

Means for Solving the Problems, Functions and Effects of the Invention
In order to achieve the above object, according to the invention described in claim 1 or 2, in the oil-water separation device that electrolyzes waste water containing oil and separates the oil, a conductive material that accommodates the waste water is provided. A technical means is used in which a negative pole of a DC power supply is connected to a main body of a drainage tank formed of a material, and a positive pole of the DC power supply is disposed in the drainage tank.

[0006] Since the negative electrode of the DC power supply is connected to the main body of the drainage tank for containing the drainage and the positive electrode of the DC power supply is disposed in the drainage tank, the area of the wastewater to be electrolyzed is widened. The wastewater can be efficiently electrolyzed. Further, since there is no need to provide a negative electrode inside the drainage tank, the cost of the apparatus can be reduced as compared with a conventional device provided with a negative electrode.

According to a second aspect of the present invention, in the oil-water separation device according to the first aspect, the wastewater contains at least sodium chloride, and the wastewater is electrolyzed at least from the main body. The technical means of generating sodium chlorite and hydrogen is used.

That is, it is possible to kill various germs in the wastewater and deodorize it by the sodium hypochlorite generated from the main body of the drainage tank. Further, the inner wall surface of the drainage tank can be cleaned by hydrogen generated as bubbles from the main body of the drainage tank. Furthermore, when hydrogen rises in the wastewater as bubbles, pollutants such as oils and fats floating in the wastewater can be attached to the bubbles, so that the pollutants can be collected on the water surface of the wastewater.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of an oil-water separator according to the present invention will be described below with reference to the drawings. FIG.
FIG. 1 is an explanatory diagram showing a main configuration of an oil-water separation device according to this embodiment. In this embodiment, a grease trap provided in a hotel or a town restaurant will be described as an example of the oil-water separator according to the present invention. [Principal Configuration] The grease strap 10 includes a drain tank 11, which is grounded.
A box-shaped main body 12 provided with 4, 15 and a cover 13 for covering the upper surface of the main body 12 are provided. The inside of the main body 12
The first and second compartments 16 and 17 are partitioned by the partition plates 14 and 15 into three compartments. The first chamber 16 and the second chamber 17 communicate with each other through an opening 14a formed below the partition plate 14, and the second chamber 17 and the third chamber 18 are formed below the partition plate 15. It communicates through the opening 15a. The main body 12 is formed of a conductive material, for example, stainless steel, and is connected to the minus terminal 31 of the control device 30 by a connection cable 23 (FIG. 2).
Is electrically connected to Above the first chamber 16, there is provided an inlet 19 into which drainage W discharged from a kitchen or the like flows.
A filter 20 for filtering chips of food such as vegetables contained therein is provided. The drainage W flows in the direction indicated by the arrow in the figure.

A lid 21 is provided above the second chamber 17, and a positive electrode 22 is attached to the lid 21. The plus electrode 22 is attached to the lid 21 in a form in which the main body 22a protrudes downward from the lower surface of the lid 21. When the drainage W is stored in the drainage tank 11, the main body 22a
Is submerged in the drain water W, and the tip of the main body 22a and the second
A certain interval is formed between the bottom of the chamber 17 and the chamber 17. The positive electrode 22 is electrically connected to a positive terminal 32 (FIG. 2) of the control device 30 by a connection cable 24. The third chamber 18 is provided with an elbow-type outflow pipe 25. The inflow port 25a of the outflow pipe 25 is
When the water level of the wastewater W stored in 3 exceeds a certain level, it is submerged, and the wastewater W that has flowed in from the inflow port 25a is discharged from the outflow port 25b to a sewer. Above the inflow port 25a is a bottomed cylindrical cover 2
6, so that the odor in the drainage tank 13 does not leak outside through the outflow pipe 25.

[Electrical Configuration] Next, the grease strap 1
The main electrical configuration of 0 will be described with reference to FIG. The control device 30 includes a switch 35 for starting or stopping, a transformer 36 for lowering the AC supplied from the AC power supply 33, a DC converter 37 for converting the AC lowered by the transformer 36 to DC,
An electrolytic capacitor C1 for voltage stabilization, a transistor Tr1 as a radiator, a resistor R1 for controlling an operation current of the transistor Tr1, and a Zener diode D1 for limiting a current flowing through the resistor R1 are provided. Further, the control device 30 includes a protection circuit 34 for protecting a circuit when the main body 12 of the drainage tank 11 and the positive electrode 22 are short-circuited, and a display panel 38 for displaying an operation state. The display panel 38 displays a voltage value applied between the main body 12 and the positive electrode 22, a current value flowing between the main body 12 and the positive electrode 22, an operation state of the protection circuit 34, and the like by an LCD or an LED.

[Operation and Effect] Next, operation and effect of the grease strap 10 will be described. First, when the switch 35 of the control device 30 is turned on, a DC voltage is applied between the main body 12 of the drainage tank 11 and the positive electrode 22. Then, due to the electrolysis between the main body 12 and the positive electrode 22, the fats and oils contained in the waste water W are neutralized and destroyed. At this time, since the entire body 12 has a negative pole, the drainage W in contact with the inner wall surface of the body 12 and the partition plates 14 and 15 can be uniformly electrolyzed. The efficiency of electrolysis can be higher than that of electrolyzing the region. Therefore, the oil contained in the waste water W can be efficiently separated. In most cases, the wastewater W contains salt, so that wastewater containing salt (NaCl + H ₂₎
O) is electrolyzed to (NaClO + H ₂ ).
Here, NaClO is sodium hypochlorite, and sodium hypochlorite has a deodorizing and sterilizing action.

Therefore, sodium hypochlorite can be produced over a wide range of the wastewater W by electrolysis.
A wide range of the drainage W can be deodorized and sterilized.
In addition, since hydrogen is generated as bubbles B from the inner wall surface of the main body 12 and the partition plates 14 and 15 due to the electrolysis of the drainage W, pollutants adhere to the inner wall surface of the main body 12 and the partition plates 14 and 15 and the like. Can be prevented. In addition, bubble B
Hydrogen that rises in the wastewater W
Since the contaminants such as oil floating inside adhere to the ascent, the contaminants such as oil can be collected on the water surface of the wastewater W. As described above, if the grease strap 10 according to this embodiment is used, since the main body 12 of the drainage tank 11 is a negative pole of the DC voltage, the drainage W can be electrolyzed over a wide range. Electrolysis can be performed efficiently. In addition, since there is no need to provide a negative electrode, the cost of the apparatus can be reduced. In the above embodiment, a grease trap installed in a hotel or restaurant has been described as an example of the oil-water separation device according to the present invention. However, in a place such as a gas station where oily substances are mixed into wastewater. The oily substance recovery device according to the present invention can be applied to a grease trap or a drainage tank provided.

[Brief description of the drawings]

FIG. 1 shows a grease strap 1 according to an embodiment of the present invention.
FIG. 4 is an explanatory diagram showing a main configuration of a zero.

FIG. 2 is an explanatory diagram showing a main electrical configuration of a grease strap 10 shown in FIG.

FIG. 3 is an explanatory diagram showing an example of a conventional oil-water separation device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Grease strap (oil-water separation device) 11 Drainage tank 12 Main body 22 Positive electrode 30 Controller 31 Minus terminal 32 Plus terminal

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hideki Kinoshita 100 Kanayama, Ichiriyama-cho, Kariya City, Aichi Prefecture Inside (72) Inventor Haruo Mizuno 100 Kanayama, Ichiriyama-cho, Kariya City, Aichi Prefecture Toyota Body Inside (72) Inventor Kenichi Suzuki 41-41, Ochi-cho, Yoji, Nagakute-cho, Aichi-gun, Aichi Prefecture F-term in Toyota Central R & D Laboratories Co., Ltd. 4D037 AA11 AB06 BA04 BB01 CA04 CA16 4D061 DA08 DB10 DB19 DC01 EA02 EB04

Claims (2)

[Claims] 1. An oil-water separator for electrolyzing wastewater containing oil to separate the oil, wherein a negative electrode of a DC power supply is connected to a main body of a drainage tank formed of a conductive material containing the wastewater. An oil-water separator, wherein a positive pole of the DC power supply is disposed in the drainage tank. 2. The oil / water separation according to claim 1, wherein the wastewater contains at least sodium chloride, and at least sodium hypochlorite and hydrogen are generated by electrolysis of the wastewater. apparatus.