JP2003126603A - Oil-water separator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil-water separator constituted so as to boil oil-water mixed liquid fed into a vacuum chamber and capable of supplying city water into the vacuum chamber from the outside without disassembling the vacuum chamber to wash the inside of the vacuum chamber. SOLUTION: The oil-water separator is equipped with the vacuum chamber 10 into which the oil-water mixed liquid is fed and a water circulating circuit 19 wherein a water tank 12, an ejector 13 and a pump are connected by pipes. The negative pressure generated by the water circulating circuit 19 is applied to the vacuum chamber 10 and the oil-water mixed liquid evaporates only water and the steam is condensed in a cooler 11 to obtain treated water. A water passing pipe 32 is connected to the water circulating circuit 19 and vacuum chamber 10 to supply city water to them. When the inside of the vacuum chamber 10 is washed, the ejector 13 is stopped to supply city water into the vacuum chamber 10 from the water passing pipe 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil / water separation device, and more particularly to an oil / water separation device for separating water from an oil-containing drain water and oil by heating and boiling the inside of a vacuum chamber under negative pressure. .

[0002]

2. Description of the Related Art As a conventional oil-water separator in a vacuum heating system, there is one disclosed in Japanese Patent Laid-Open No. 2000-18162. In this publication, the vacuum chamber is connected to the suction side of a vacuum pump, and the main body of the vacuum chamber is provided with a heater for raising the temperature of an oil-water mixed liquid (for example, drain) inside. To separate the drain into oil and water, the drain is introduced into the vacuum chamber, the vacuum pump is operated, and the temperature of the vacuum chamber is raised by the heater. When the vacuum chamber reaches the boiling point of water under vacuum, the water in the drain is vaporized and released from the vacuum pump to the atmosphere, leaving only oil in the vacuum chamber.

This apparatus has a structure in which drain is sequentially introduced into a vacuum chamber to separate oil and water, and oil remaining in the chamber is discharged.

[0004]

The inside of the vacuum chamber is liable to be polluted by the scattering of oil when the oil-water mixture is boiled. However, in the prior art, the inside could not be cleaned without disassembling the chamber. In many cases, the work is continued without being sufficiently washed, which causes a problem that the accuracy of the oil / water separation work is reduced.

Further, when the oil-water mixed liquid in the vacuum chamber is in a boiling state, the liquid surface is wavy, and an accurate liquid surface cannot be detected. Therefore, an appropriate amount of oil-water mixed liquid is introduced into the vacuum chamber. There is a problem that it is difficult to determine whether or not it is.

An object of the present invention is to provide the interior of a vacuum chamber with
An object of the present invention is to provide an oil / water separator that can be cleaned without disassembling the vacuum chamber.

Another object of the present invention is to provide an oil / water separation device configured to alleviate waviness of the liquid surface due to boiling of the oil / water mixture when heating and boiling in the vacuum chamber to separate oil / water. It is in.

[0008]

In order to achieve the above object, in the present invention, a vacuum chamber for introducing and separating an oil / water mixture, a cooler, a water tank, an ejector, and a water pipe connected by a pipe are connected. A circulation circuit is provided, the vacuum chamber is connected to a cooler, the cooler is connected to the ejector, a heater is provided in the vacuum chamber, and a negative pressure generated by a water circulation circuit is supplied to the vacuum chamber. The oil-water separator is characterized in that a water circulation circuit and a vacuum chamber are connected by a water pipe, the ejector is stopped during cleaning of the vacuum chamber, and tap water is supplied to the vacuum chamber through the water pipe.

Further, a mesh plate or a perforated plate is provided in the portion of the vacuum chamber where the drain is immersed.

A partition plate is provided at a position apart from the drain surface inside the vacuum chamber.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing the structure of an oil / water separator of the present invention, FIG. 2 is a sectional view showing the internal structure of a water tank, and FIG. 3 is a sectional view showing the internal structure of a vacuum chamber. .

In the drawing, a vacuum chamber 10 is shown as a pipe 1.
4, it is connected to the cooler 11, and is also connected to the pipe 32, the three-way solenoid valve 17 and the ejector 13. The pipe 32 is connected to the pipe 14 and is connected to the vacuum chamber 10. Also, the ejector 13 and the cooling 1
1 is connected to a pipe 15 and the pipe 15 is provided with an electromagnetic valve 43 for opening to the atmosphere. Further, the discharge side of the ejector 13 is connected to the water tank 12. A pump 16 and a three-way solenoid valve 17 are provided below the water tank 12 via a pipe 18.
It is connected to the. In this way, the water tank 12, the ejector 13, the pump 16, the pipe 18, the three-way solenoid valve 17
The water circulation circuit 19 is formed by this. The circulation circuit 19 constitutes a vacuum generating mechanism. By the way, the ejector 13 is provided with a cooling mechanism for cooling the water in the water tank 12 in order to stabilize the driving water temperature because the accuracy decreases as the driving water temperature rises. The water cooling mechanism in the present embodiment includes a refrigerator 20 and a condenser 2.
It is performed by the refrigeration system consisting of 1. That is, the gas cooled by the refrigerator 20 is caused to flow through the heat exchanger 22 provided in the water tank 12 to prevent the water temperature in the water tank 12 from rising. On the other hand, in the vacuum chamber 10, a radiator 23 for releasing heat on the condensation side of the refrigerator 20 is provided. The water tank 12 is also provided with a water supply pipe 24 for supplying tap water.

In the present embodiment, the heat exchanger 22 is provided inside the water tank 12. However, the heat exchanger 22 is the water tank 1.
It is not limited to be installed inside the water tank 2, but may be installed in the water circulation circuit 19.

Further, a drain supply pipe 30 and a waste liquid discharge pipe 31 are connected to the vacuum chamber 10. The discharge pipe 34 connected to the float pipe 33 provided in the vacuum chamber 10 is connected to the waste liquid discharge pipe 31 via the manual valve 39. An electromagnetic valve 35 is provided in the drain supply pipe 30 connected to the vacuum chamber 10. The waste liquid discharge pipe 31 is also provided with a solenoid valve 36, and the waste liquid discharge pipe 31 is provided with a solenoid valve 3.
A manual valve 38 is also provided in the bypass pipe 37 that bypasses the valve 6. In addition, a treated water discharge pipe 40 is connected to a position above the water tank 12. Further, the pump drain pipe 41 is provided with a manual valve 42 in the pipe 18 between the water tank 12 and the pump 16.
Connected through.

As shown in FIG. 3, the vacuum chamber 10 and the float pipe 33 are connected to each other via connecting pipes 44 provided at upper and lower positions. As a result, even if the liquid level fluctuation occurs in the vacuum chamber 10 due to the boiling of the drain, its influence is mitigated from propagating to the float pipe 33. In addition,
A water level sensor 45 for detecting the water level in the vacuum chamber 10 is provided in the float pipe 33.

A heater 50 for raising the temperature of the drain is provided inside the vacuum chamber 10. By energizing the heater 50, the temperature of the drain introduced into the vacuum chamber 10 is raised. . Further, a temperature sensor 51 is provided inside the vacuum chamber 10. In this device, the temperature sensor 5
The control mechanism that compares the temperature measured by 1 with the set time until the boiling point of the oil-water mixture, which is determined according to the degree of vacuum, and the device malfunctions when the boiling point is not reached within the set time. It has an alarm device that detects that there is an alarm and displays an alarm.

A mesh plate or a perforated plate 52 is provided for preventing oil from scattering due to boiling of the drain while being immersed in the drain in the vacuum chamber 10. Further, a partition plate 53 is provided in the upper part of the vacuum chamber (a position where it does not come into direct contact with the drain), and the oil component mixed in the evaporated gas is adsorbed by the partition plate 53 to be removed. still,
In this embodiment, the partition plates 53 are provided substantially parallel to the liquid surface, and the partition plates 53 are arranged in a plurality of stages so as to form a labyrinth-like steam flow path so that steam does not directly go to the inlet of the pipe 14. It is arranged. It should be noted that the partition plate 53 is not parallel to the liquid surface as in the present embodiment, but is installed with a predetermined inclination so that the oil adhered to the partition plate 53 returns to the drain reservoir below. It is also possible to improve the recovery rate of waste oil. In the present embodiment, the heater 50 is provided inside the vacuum chamber 10, but it may be provided outside the vacuum chamber 10 to raise the temperature of the chamber.

Next, the operation of oil / water separation by this apparatus will be described. First, drain, which is an oil / water mixed liquid, is introduced into the vacuum chamber 10 through the drain supply pipe 30. When a predetermined amount of drain has been introduced into the vacuum chamber 10, the electromagnetic valve 35 is closed and the introduction is stopped. The instruction to start the drain introduction is given on a control panel (not shown). Float tube 3 during work
When the water level sensor in 3 detects that the water level of the drain in the vacuum chamber 10 has dropped below a predetermined position, a control mechanism (not shown) automatically opens the solenoid valve 35 to open a new drain. Introduce. When oil-water separation is performed in the vacuum chamber 10, an upper limit value and a lower limit value are set for the amount of water in the tank. At this time, the water tank 1
It is assumed that 2 is supplied with a predetermined amount of water in advance.

Next, the pump 16 is operated to operate the water tank 12
The water in the pipe 18 and the three-way solenoid valve 117 is supplied to the ejector 13.
Circulate through. At the same time, the heater 50 of the vacuum chamber 10 is energized to raise the temperature of the drain. Since the drain inside the vacuum chamber 10 is heated and the gas inside the pipes 14 and 15 is sucked by the ejector 13, the inside of the vacuum chamber 10 becomes a negative pressure. When the vacuum chamber 10 has a negative pressure, the water in the drain in the vacuum chamber 10 boils at a low temperature. Since the radiator 23 that radiates heat on the condensation side of the refrigerator 20 in the refrigeration system described above is provided inside the vacuum chamber 10, the radiator 23 acts as an auxiliary heat source as the temperature rises by the heater 50. As a result, it is possible to promote the temperature rise of the drain and save power.

The water content of the drainage that has boiled in the vacuum chamber 10 becomes water vapor that does not contain oil, is sent to the cooler 11 through the pipe 14, is returned to water in the cooler 11 and becomes treated water, and the ejector 13 It is collected in the water tank 12 via the. The accuracy of the ejector 13 decreases as the driving water temperature rises. In order to prevent this, the heat exchanger 22 connected to the refrigerator 20 provided in the water tank 12 suppresses the rise in water temperature.

The treated water collected in the water tank 12 contains almost no oil content (becomes an oil content satisfying the environmental standard), and therefore can be discharged as it is to the sewer or the river. When the water level of the treated water collected in the water tank 12 reaches the connection portion of the treated water discharge pipe 40, the treated water is discharged from the treated water discharge pipe 40. Further, in the vacuum chamber 10, when the water level sensor 45 of the float pipe 33 detects that the water level of the drain has reached a predetermined level due to the progress of processing, the electromagnetic valve 36 is opened to contain the oil from the waste liquid discharge pipe 31 and concentrate it. The drainage is collected as a waste fluid drain.

The above is the outline of the oil / water separation operation. Next, it is necessary to clean the inside of the vacuum chamber 10 after performing oil / water separation several times. The procedure of this cleaning will be described.

First, the solenoid valve 43 of the pipe 15 connecting the cooler 11 and the ejector 13 is opened. As a result, the pipes 14 and 15 and the inside of the vacuum chamber 10 are brought to atmospheric pressure.
Further, the three-way solenoid valve 17 is switched to connect the pipe 18 under the water tank 12, the circuit of the pump 16 and the water pipe 32 (disconnect the ejector 13). Tap water is introduced into the water pump 12 from the water supply pipe 24, and the pump 16 is operated to supply the water in the water tank 12 to the vacuum chamber 10 through the pipe 18 and the water pipe 32. The inside of the vacuum chamber 10 is washed with the supplied water.

The waste liquid that has washed the inside of the vacuum chamber 10 is discharged through the bypass pipe 37 by opening the manual valve 38 of the bypass pipe 37 of the waste liquid discharge pipe 31, and at the same time, the waste liquid that has washed the inside of the float pipe 33. Is also discharged through the discharge pipe 34 by opening the manual valve 39 of the discharge pipe 34.

It is to be noted that the tap water alone is supplied from the water supply pipe 24 of the water tank 12 at the time of this cleaning.
The water supply pipe 24 is branched into two, and a switching valve is provided there to allow tap water to flow to one side and a cleaning liquid in which a detergent is dissolved to flow to the other side, and the switching operation is performed to send the tap water. By switching the liquid, the inside of the vacuum chamber and the inside of the float tube 33 can be cleaned more neatly.

According to the present invention, the cleaning can be performed without disassembling the vacuum chamber in this way, and the labor required for maintenance can be omitted and the time can be shortened.

On the other hand, since the net plate or perforated plate 51 and the partition plate 52 provided in the vacuum chamber 10 alleviate the undulation of the drain liquid surface due to boiling, the inside of the float pipe 33 connected through the connecting pipe 44. A water level sensor 45 installed in the vacuum chamber detects an accurate liquid level, and an appropriate amount of drain is generated in the vacuum chamber 1.
It is possible to determine whether or not it is introduced to 0.

[0028]

According to the present invention, an oil / water mixed liquid introduced into a vacuum chamber is boiled in a vacuum to separate oil / water, and a vacuum circuit is provided in a water circulation circuit for supplying a negative pressure to the vacuum chamber. Since a water pipe to be connected is provided and tap water can be supplied from the water pipe to the vacuum chamber to clean the inside, the inside of the vacuum chamber can be cleaned without disassembling the vacuum chamber.

Further, according to the present invention, the mesh plate or the perforated plate is provided inside the vacuum chamber, or the partition plate is provided together with the mesh plate or the perforated plate. It is possible to alleviate the undulation of the surface and thereby accurately determine whether or not an appropriate amount of the oil-water mixed liquid has been introduced into the vacuum chamber.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a configuration of an oil / water separator according to the present invention.

FIG. 2 is a cross-sectional view showing the internal structure of a water tank.

FIG. 3 is a cross-sectional view showing the internal structure of a vacuum chamber.

[Explanation of symbols]

10 vacuum chamber 11 cooler 12 water tanks 13 ejectors 14 Piping 15 piping 16 pumps 17 Three-way solenoid valve 18 piping 19 Water circulation circuit 20 refrigerator 21 condenser 22 heat exchanger 23 radiator 24 Water supply pipe 30 drain supply pipe 31 Waste liquid discharge pipe 32 water pipe 33 float tubes 34 Ejection tube 35 Solenoid valve 36 Solenoid valve 37 Bypass pipe 38 Manual valve 39 Manual valve 40 Treated water discharge pipe 41 Pump drain pipe 42 Manual valve 43 Solenoid valve 44 Connection pipe 45 Water level sensor 50 heater 51 Mesh plate or perforated plate 52 Partition plate

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) F04B 37/20 F04B 37/20 39/06 39/06 B 39/16 39/16 F // F04F 5/04 F04F 5 / 04 BF term (reference) 3H003 AA00 AC01 BF02 BG04 CD07 3H076 AA21 BB14 BB15 BB45 CC91 3H079 AA14 AA23 BB01 CC23 DD02 DD09 DD14 DD22 4D076 AA22 BA02 BA41 BA45 CA11 CA16 CD22 CD23 CD26 CD43 DA02 DA08 DA14 DA07 DA14 DA14

Claims (3)

[Claims] 1. A vacuum chamber for introducing an oil-water mixture, a cooler, and a water circulation circuit in which a water tank, an ejector, and a pump are connected by pipes, and the vacuum chamber and the cooler are connected to each other. An oil / water separator that connects the cooler and the ejector, provides a heater in the vacuum chamber, and supplies negative pressure generated by the water circulation circuit to the vacuum chamber, wherein the water circulation circuit and the vacuum An oil / water separation device characterized in that it is connected to a chamber by a water pipe, and when the vacuum chamber is cleaned, the ejector is stopped and the water in the water tank is supplied to the vacuum chamber through the water pipe. 2. The oil-water separator according to claim 1, wherein a net plate or a perforated plate is provided at a position in the vacuum chamber where the oil-water mixed liquid is immersed. 3. The oil / water separator according to claim 1, wherein a plurality of partition plates are provided at positions that do not directly contact the liquid surface of the oil / water mixed liquid inside the vacuum chamber.