JPS61412A - oil water separator - Google Patents

Abstract

PURPOSE:To obtain a compact and inexpensive oil/water separator enabled in the miniaturization of the stagnation tank thereof and fitted to the treatment of waste water of usual household kitchen equipment, by enhancing the separation treatment capacity of oils and fats components. CONSTITUTION:An inflow chamber 5, a separation chamber 6 and an outflow chamber 7 are respectively demarcated in stagnation tank 1 and a small caliber pipe aggregate 11, which is formed by integrally gathering a large number of small caliber metal or synthetic resin pipes 10 by an adhesive so as to make the dimension thereof in the heigh direction shorter than the water depth of the separation chamber 6, is arranged in the separation chamber 6 so that the above-mentioned pipes 10 are supported at both sides by tank side walls so as to respectively incline the angle theta of said pipes by about 20 deg. toward the side of the outflow chamber 7 and the lower ends thereof are allowed to be spaced apart from the bottom part 1c of the stagnation tank 1 while the upper ends thereof are slightly lower than the surface of water. Waste water, which is flowed in the stagnation tank 1 from an inflow pipe 2 and weakened in the force of water through the filtering by a strainer 8, receives the separation of oils and fats OF therein with good efficiency within a short time by the action of the small caliber pipe aggregate 11.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is installed in the drainage section of kitchen equipment, separates and collects oil and fat contained in the drainage water, and drains the oil and fat to the water pipe. This relates to an oil-water separator that stops the flow of υ1 water containing 6I.

[Prior Art] Since the fats and oils contained in waste water can cause a decline in the functionality of piping equipment or cause damage to the equipment, standards have been established in various laws.

However, the pipeline may become blocked due to the activation of fats and oils, or υ1
Because there are many problems such as a decline in the treatment efficiency of final treatment plants due to the influence of oil and fat in water, currently oil-water separators, oil and fat separators are mainly used for commercial kitchen equipment such as hotels, restaurants, cafeterias, etc. An increasing number of cities are enacting ordinances requiring the installation of filters, etc.

Various types of oil/water separators are commercially available in response to the demand for meeting these regulations.An example of this will be explained based on FIG. 3.The oil/water separator 30, commonly known as a grease trap, is Two partition plates 32.
32 divides the upper and lower parts of the water surface into three parts to form an inflow chamber 331 and a separation chamber 34.
and an outflow chamber 35, and the separation chamber 34 is opened for a sufficient period of time to separate the oil and fat from the inflowing wastewater.
In addition, a baffle plate 36 is installed at the bottom of the tank to prevent the inflowing wastewater from directly flowing into the outflow chamber 35 and reduce the retention time. A three-dimensional mesh strainer 37 is disposed in the inflow v33 to filter out dust and W materials in the inflowing wastewater,
Efforts have been made to keep the inside of the #1 chamber 34 in a substantially static state so as to extinguish the vigorously flowing wastewater and increase the efficiency of partial condensation of fats and oils. Accordingly, the oil and fat content OF with low specific gravity contained in the waste water is divided by the partition plates 32, 32 of the chamber 34.
Generally, the oil and fat content OF is collected by floating on the water surface in the area defined between the two, and the collected oil and fat OF is periodically sucked up or scooped up to be removed.

[Problems that the invention attempts to solve]

Therefore, commercially available oil-water separators are mainly for commercial use, and because they have a large retention tank so that the wastewater stays in the tank for a long time, they are large and expensive, and they also float to the water surface in the separation room. The oil and fat that has been removed must be removed by scooping it up manually or pumping it up using a pump, etc., and since the removal work is troublesome, it is often left unattended for a specified period of time without proper maintenance and management. However, the present invention attempts to solve these problems, such as the large amount of oil and fat that is collected and there is a risk of overflowing and flowing into the V1 outlet pipe. The purpose of this invention is to provide an inexpensive oil-water separator that is suitable for wastewater treatment of general household kitchen equipment and that enables the size of the retention tank to be made smaller by increasing the ability to separate oil and fat.

[Means for solving problems]

As a means for solving the above problems, the present invention provides an oil-water separator that collects inflowing wastewater in a tank and separates and collects oil and fat contained in the wastewater using the difference in specific gravity. An assembly of a large number of small diameter pipes bundled together in the tank,
The lower end is spaced apart from the tank bottom, the upper end is located slightly lower than the water surface, and the small diameter pipes constituting the aggregate are arranged so as to be inclined at a predetermined angle with respect to the vertical. [Example of Actual Washing] The present invention will be explained below based on FIG. 1 and FIG. 2.

FIG. 1 shows an embodiment of an oil-water separator according to the present invention, in which an inflow pipe 2 for flowing wastewater into the tank is provided at the upper part of the side wall of a retention tank 1, and an inflow pipe 2 is provided at a lower level than the inflow pipe 2 and is opposite to the tank. An outflow pipe 3 is connected to the position, and the water level of the wastewater that flows into the retention tank 1 and accumulates therein is maintained at the level of the inner bottom of the outflow pipe 3 that causes the treated wastewater to overflow to the drain pipe etc. . In addition, a short pipe bent into an elbow shape is used as the connection part 1a of the outflow pipe 3, and the outflow pipe 3 is connected to the connection port provided at the end of the pipe, which is fixed to the side wall of the tank. It is bent downward and positioned below the water surface, and a through hole 1b is provided at a position facing the space above the water surface in the tank at the intermediate analysis bending part, so that the connection part 1a and the outflow pipe 3 are connected to each other.
to prevent it from acting as a siphon.

In addition, inside the reservoir 461, two A1-cut plates 4, 4 are placed in liquid-tight contact with the side walls of the tank at both ends, so that the bottom 10 side is in communication with the water surface. Part 1
A separation chamber 6 is defined between the cut plates 4 and 4, and an outflow chamber 7 is defined on the outflow pipe 3 side, and a strainer 8 formed in the shape of a three-dimensional net 1 is disposed within the inflow chamber 5. Furthermore, a baffle plate 9 is erected 4 at the bottom 1C of the separation chamber 6 as required.

In the separation chamber 6, which is always in a substantially static state, a plurality of heavy-duty metal pipes or synthetic resin pipes 10 are installed.
A small diameter pipe assembly 11 formed in such a way that the brush cut in the height direction is shorter than the water depth of the separation chamber 6 is connected to the metal pipe or synthetic resin pipe 10, respectively. The angle -θ relative to the tank is about 20 degrees (C1-
When one end of I is separated from the bottom part 1C, the end of Jt- is arranged so that it is slightly lower than the water surface. Separate and complement.

Further, a vacuum pump 12 is installed outside the retention tank 1 to suck up the oil and fat OF collected on the water surface of the separation chamber 6 and discharge it to the outside of the tank. The suction side end 13a of the connected discharge pipe 13 provided with a funnel-shaped suction port is arranged at a position slightly higher than the water level in the portion 1111v6, and It is inserted into the storage tank 1/4 that stores the fraction OF.

In the oil/water separator configured as #4 in this way, the inlet pipe 2J connected to the drain port of the layer facility is: The waste water containing oil and fat that flows into the tank 1 first flows down into the strainer 8 of the inflow chamber 5, filtering out the dust and foreign matter in the waste water, and then passing through the strainer 8. When passing through the chamber 8, it is deenergized and flows down to the compartment 6 through the partition plate 4.

Due to the difference in specific gravity, some large chunks of oil and fat contained in the water that flows down into the water chamber 6, which is always in a nearly static state,
υ1 separated from the water between J and Richi@ and t on the C water surface? l
In addition, fine particulate oil and fat adhere to the inner and outer surfaces of the plurality of small diameter pipes 10 constituting the small diameter pipe assembly 11.
11 Separated from the water, the adhering particulate oils and fats combine with each other to form a rather large lump, which is then lifted off the surface of the small diameter pipe 10, floated to the surface of the water. is collected by.

Therefore, fine particulate oil and fat can be collected in a relatively short time in the separation chamber 6, and the time required for drainage is also shortened.

Then, the published books that have been separated from oil and fat OF are stored in the outflow chamber 7.
It flows down into the outflow chamber 7 through the side partition plate 4, and flows out from the outflow pipe 3 to a drain pipe (not shown). At this time, a short pipe bent into an elbow shape is used as the connection part 1a for connecting the outflow pipe 3, and the inlet at its end is positioned below the water surface. Even if the water flows down into the chamber 7, is separated in the outflow chamber 7, and floats on the water surface, it will not flow out from the outflow pipe 3.

Also, the oil and fat collected on the water surface of the V chamber 6 is removed from the vacuum tank 11 when it is placed on a certain surface or at a certain time.
2 to suck up only the oil part OF that has coagulated below the water surface, remove it from the tank, and collect it in the storage tank 14. Discard.

FIG. 2 shows another embodiment of the present invention, in which, instead of using the vacuum pump 12 to remove the oil fraction collected in the previous example, The purpose is to make W41 airtight and increase the pressure inside the tank to remove only the oil portion OF from the 111 outlet pipe to the outside of the tank. -(Details MIlr
:J'e light is omitted.

The retention tank 20 with 1 to 11 oil/moisture parts is divided by two partition plates 4°/II, 14 inflow 59 minutes #1 6 and 7 flow (outlet chamber 7), and the upper part of the tank is divided into The frontage (lid body 2) is airtightly closed by interposing a seal for opening and closing, and the inlet pipe 22 that prevents wastewater from flowing into the retention tank 20 is equipped with a valve 22a, which is used to collect treated wastewater. The outflow pipe 23 that connects the A--bar 71 is connected to the valve 23B in the same way as in the previous embodiment, and the elbow-shaped connection part 2Qa to which the outflow pipe 23 is connected is connected under the water surface. Below the inlet located at , there is a baffle plate 24 that projects obliquely upward from the side wall of the tank with a distance of 1 llt from the inlet.

In addition, in the inflow chamber 5, there are drains 1 to 8 which filter out dust and foreign matter in the drainage water and also dissipate the force of the water.
However, in each of the chambers 6, small diameter tube assemblies 11 having the function of efficiently separating the particulate oil part in the waste water in a short time are arranged in the same manner as in the previous embodiment.

The lid 21 that airtightly closes the retention tank 20 is connected to a simple pump J (shown in the figure) that supplies air manually or by stepping on the tip of the air pipe 25. The discharge pipe 26, which discharges the oil portion OF collected on the water surface of the front two separation chambers 6, has its tip end 26a formed by a flexible 1!t hose covered with a lid. The body 21 is airtightly passed through, and the funnel-shaped tip 26b is connected to the float 27.
ζ is arranged so that it is always maintained at the water surface (the surface of the collected oil portion OF), and is arranged outside the tank.
The other end is inserted into a storage tank 14 that stores IC oil and fat from J1 outside the tank.

The oil/water 1lII vessel is configured as follows:
It flows from the inflow pipe 22 into the retention w420, and the strainer 8
The wastewater whose water force has been weakened is efficiently divided into oil portions 0[1] in a short time by the action of the small diameter pipe assembly 11 in the separation chamber 6, which is always in a substantially static state, and the separated oil portions 01- floats to the surface and is collected below the water surface in the separation chamber 6.

In addition, the treated wastewater from which the oil part O is separated and collected on the water surface in this outflow chamber 7, and the inlet of the connection part 20a connected to the outflow pipe 23 is located below the water surface, so that the oil and fat content OF is collected and collected on the outflow pipe. 23, and furthermore, a baffle plate 24 is installed below the inlet of the connection part 20a of the outflow pipe 23, which is located below the water surface. The oil portion 01- does not enter the outflow pipe 23 either.

The collected oil fraction OF is removed when the oil fraction OF remains suspended on the water surface of the separation chamber 6 or periodically.
Close the valve 23a of the outflow pipe 23 and the valve 23a of the outflow pipe 23. 111 After making the inside of the reservoir W420 airtight, a simple pump (not shown) is driven manually or by foot to pump the air pipe 2.
5, air is sent into the upper space inside the tank to increase the air pressure in the upper space inside the tank. However, since only the discharge pipe 26 is in communication with the atmosphere, the air pressure is increased by J between the float f27 and the flexible hose 26a. 11 The water surface of the Il chamber 6 is always blue on the surface of the IC oil and fat OF.
The oil and fat OF is sent out from the tank, and the sent out oil and fat OF is removed to the outside of the tank through the discharge pipe 26 and released into the storage tank 14.
automatically collected.

In this embodiment, the funnel-shaped tip 26b of the C discharge pipe 26
The float 27, which retains the collected fats and oils on the surface of the collected oil and fat O
6b [The funnel-shaped tip 26b is positioned slightly higher than the water surface, and the funnel-shaped tip 26b is located above the oil and fat content OI with low specific gravity.
If the buoyancy is set so that it is in contact with the F surface, the oil and fat content O
Shipping only F can be automatically achieved.

〔Effect of the invention〕

As explained above, the oil/water preparator according to the present invention includes an assembly in which a large number of small-diameter pipes are bundled together in a tank, the lower end of which is separated from the bottom of the tank, and the upper end of which is positioned slightly lower than the water surface. In addition, each small diameter pipe constituting the aggregate is arranged so as to be inclined at a predetermined angle with respect to the vertical, and fine particulate oil and fat in the active water is attached to the surface of each small diameter pipe constituting the aggregate. Since the oil and fat in the IC particle form combine with each other and make it easier to float, the oil-water separation efficiency is high, and the required retention time is short, so the structure is In the tube 1]
This makes it possible to downsize the storage tank and make it more cost-effective.

In addition, each of the small-diameter pipes constituting the aggregate is arranged in the pre-distribution chamber at a predetermined angle with respect to the vertical direction, so that
1. The fine particle-like oil and fat in the water easily adheres to the surface of each type of diameter pipe, and the oil and fat in the form of small particles (1') combine with each other, and C) they tend to get muddy. is obtained. .

[Brief explanation of the drawing]

Figure 1 J3 and Figure 2 each relate to the present invention? 11
1 An example of a water separator is shown in Figure C1 [Cross section 11]
1. Cross-sectional hemostasis diagram of another embodiment, FIG. 3 is a cross-sectional IT view of a conventional oil-water preparator. 1 (Yo retention tank, 2 is inflow pipe, 3 is outflow pipe, 4 is 1 cut plate, 13 is inflow chamber, 6 is 11 chambers, 7 is outflow chamber, 8 is sl~reli, 10 is Small diameter pipe, 11 small diameter pipe assembly, 12
is the vacuum pump, 13 is the discharge pipe, 14 is the storage tank, 20 (YoWit storage tank, 21 is the rosette, 22 is the inflow pipe, 22) 1 is the valve, 23 is the outflow envelope, 23a is the valve, 2/I is the obstruction 25 is an air pipe, 26 is a discharge pipe, 26a is a flexible hose, 26b is a funnel-shaped tip, 27 is a float, and 0'' is an oil content.

Claims (1)

[Claims] 1. In an oil-water separator that collects inflowing wastewater in a tank and separates and collects oil and fat contained in the wastewater by utilizing a difference in specific gravity, an assembly in which a large number of small diameter pipes are bundled together in the tank. The lower end is spaced from the bottom of the tank, the upper end is located slightly lower than the water surface, and each small diameter pipe constituting the aggregate is arranged so as to be inclined at a predetermined angle with respect to the vertical. separator.