JPH08309102A - Separation device for emulsifying oil - Google Patents

Abstract

PURPOSE: To provide a separation device for emulsifying oil which is capable of efficiently separating and removing oil at short time by gradually enlarging the particle of oil in liquid by coagulation while allowing the liquid to be treated to continuously flow. CONSTITUTION: This separation device for emulsifying oil is provided to separate and remove an oil mixed into a liquid in an emulsion state. A first separator 3 and a second separator 4 are both constituted of a lipophilic fiber whose diameter and density are stepwise changed in each of these separators. The separators 3 and 4 are successively arranged in the flow path of a liquid to be treated, in such a manner that the liquid is firstly passed through the separator 3 toward the part 3b having a small fiber diameter and a dense fiber density from the part 3d having large diameter and coarse fiber and then the liquid is passed through the separator 4 toward the part 4d having large diameter and coarse fiber from the part 4b having small diameter and dense fiber.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emulsified oil separation device for separating and removing oil mixed in a liquid in an emulsified state.

[0002]

2. Description of the Related Art In hydraulic oil consisting of water and glycol, mineral oil is mixed as fine particles in the hydraulic oil as the hydraulic operation is repeated. In order to separate and remove the mineral oil from the hydraulic oil mixed with the mineral oil, the mineral oil content is removed from the hydraulic oil by means such as stationary separation and centrifugation, which are conventionally known as a means for separating emulsified oil. It becomes necessary to separate the oil and to absorb the mineral oil into the resin particles and fibers.

[0003]

However, the conventional means for separating and removing emulsified oil as described above requires a wide space and a long time, requires a lot of labor, and costs a lot. In any case, there is a problem that the mineral oil cannot be efficiently separated from the hydraulic oil in a short time.

An object of the present invention is to eliminate the disadvantages of the conventional emulsified oil separation device as described above, and more specifically, the particles of oil in the liquid while continuously flowing the liquid to be treated. It is an object of the present invention to provide an emulsified oil separation device capable of efficiently separating and removing oil in a short time by gradually enlarging the oil.

[0005]

In order to solve the above-mentioned problems and to achieve the object, the present invention, as described in claim 1 above, uses an oil mixed in an emulsified state in a liquid. In an emulsified oil separation device for separating and removing, each is composed of lipophilic fibers, and each is provided with a first separator and a second separator in which the fiber diameter and fiber density are changed stepwise, and The treatment liquid first passes through the first separator from the one having a large fiber diameter and coarse fiber density toward the one having a small fiber diameter and fine fiber density, and then the second separator,
To pass from the smaller fiber diameter and finer fiber density toward the larger fiber diameter and coarser fiber density,
A first separator and a second separator are sequentially arranged in the flow path of the liquid to be treated.

[0006]

[Operation] According to the above-mentioned configuration, first, the liquid to be treated flows through the first separator from the one having a smaller fiber density to the one having a smaller fiber density. The fine oil particles mixed in are entangled with the fibers of the separator, and the particles of several microns to several tens of microns are swelled to pass through the first separator.

Then, the liquid to be treated containing the oil particles swelled up to several tens of microns flows through the second separator from the finer fiber density to the coarser one,
Particles of several tens of microns mixed in the liquid are entangled with the fibers of the separator, further enlarging and growing into oil droplets.

The oil droplets are discharged from the surface of the second separator by the flow of the liquid to be treated and then separated by the difference in specific gravity from the liquid to be treated, and the separated oil droplets are removed from the treated liquid. It will be.

[0009]

Embodiments of the emulsified oil separator according to the present invention will be described below with reference to the drawings.

FIG. 1 shows a whole emulsified oil separation device according to an embodiment of the present invention. In order to separate and remove mineral oil content mixed therein from water / glycol hydraulic oil used as hydraulic hydraulic oil. In the separation device, the pump 2 for pumping the hydraulic oil to be treated is arranged on the upstream side of the treatment channel 1, and the treatment channel downstream of the pump 2 is
The processing tanks 5 and 6 in which the separators 3 and 4 are housed are arranged so that the hydraulic oil sequentially passes through them.

The hydraulic oil pressure-fed by the pump 2 is controlled so that the flow velocity of the hydraulic oil flowing through the processing tanks 5 and 6 is within a certain range based on the detection of the meters 7 and 8 arranged at appropriate positions. There is. In addition, each processing tank 5,
Drain pipes 9 and 10, which are closed during the processing of the hydraulic oil, are provided at 6, respectively.

FIG. 2 shows the separators 3 and 4 housed in the processing tanks 5 and 6 of the above separating device and the passage of hydraulic oil. In this embodiment, the first separator 3 and The processing tank 5 for containing it, the second separator 4 and the processing tank 6 for containing it are
The structures are almost the same so as to have compatibility.

That is, both the first separator 3 and the second separator 4 have a space 3 at the center where the working oil flows.
a, 4a, from the inside to the outside,
The separator elements of the layers 3b and 4b having the smallest fiber density, the layers 3c and 4c having the medium fiber density, and the layers 3d and 4d having the coarsest fiber density are concentrically provided.

In each of the separators 3 and 4, the separator elements having different fiber densities are formed of fibers having an extremely strong affinity for mineral oil such as polypropylene and nylon in this embodiment. The layers 3b and 4b having the smallest density are 0.16 to 0.17 g / cm ³ of fibers having a diameter of about 1 to 2 μm.
The layers 3c and 4c having a moderate fiber density have a diameter of 4 to 8 μm.
The extent of fiber 0.16~0.17g / cm ³ or so, fiber density coarsest layer 3d, 4d, the fiber diameter of about 10~20μm has become 0.16~0.17g / cm ³ approximately .

The inside of each of the processing tanks 5 and 6 is an upper chamber 5.
a, 6a and lower chambers 5b, 6b, and upper chamber 5
separators 3 and 4 are arranged on the sides of a and 6a,
Central cavities 3a and 4a of the separators 3 and 4 communicate with the lower chambers 5b and 6b of the respective tanks, and the lower chambers 5b and 6b of both tanks are communicated with each other by a communication channel 1a.

The upper chambers 5a and 6a of the processing tanks 5 and 6 are provided with openings 5c and 6c, which are connected to the processing flow passage 1 of the hydraulic oil, on their sides, respectively. 5 c is an introduction part for introducing the unprocessed hydraulic oil pumped by the pump 2 into the processing tank 5,
The opening 6c of the processing tank 6 is a discharge part for discharging the processed hydraulic oil after the mineral oil is removed.

Further, the upper chambers 5a, 6 of the respective processing tanks 5, 6
The passages 11 and 12 are connected to the upper side of the a, respectively, and the passage 11 is connected to the upper side of the processing tank 5.
Is an air vent, and the passage 12 connected to the upper side of the storage tank 6 serves as a removal flow path for removing the mineral oil separated from the air vent.

As for the state of passage of the hydraulic oil in the processing tanks 5 and 6 in which the separators 3 and 4 are stored as described above, the hydraulic oil before processing which is pumped by the pump 2 is first discharged from the opening 5c. The first separator 3 is introduced into the upper chamber 5a of the processing tank 5 from the outermost layer 3d to the innermost layer 3d having the coarsest fiber density to the finest layer 3b.
After passing through each element in sequence toward, the gas flows into the lower chamber 5b of the processing tank 5 through the central hollow portion 3a.

Then, the hydraulic oil that has flowed into the lower chamber 5b of the processing tank 5 is introduced into the lower chamber 6b of the processing tank 6 through the communication flow path 1a, and the central hollow portion of the second separator 4 from the lower chamber 6b. 4a, through the second separator, from the inside to the outside, sequentially passing through each element from the layer 4b having the smallest fiber density to the layer 4d having the coarsest fiber density, and then in the upper chamber 6b of the processing tank 6. Flow into.

As described above, the hydraulic oil passing through the respective separators 3 and 4 is mixed into the first separator 3 by passing through the first separator 3 from the coarser fiber density 3d toward the finer fiber 3b. The coarse dust formed is removed by the coarse fiber density layer 3d, and the fine mineral oil particles mixed in the working oil are entangled with the fibers of the separator and enlarged, and the particles of several microns to several tens of microns. It grows up to particles.

Next, the working oil containing the particles of mineral oil which has grown to several tens of microns is mixed into the working oil by passing through the second separator 4 from the finer fiber density side 4b to the coarser side 4d. Particles of several tens of microns are entangled with the fibers of the separator and further enlarged, and grow into oil droplets that can be separated from the hydraulic oil.

The oil droplets of the mineral oil flow from the outer surface of the second separator 4 to the upper chamber 6 of the processing tank 6 due to the flow of hydraulic oil.
After being discharged into a, it is separated upward due to the difference in specific gravity with the hydraulic oil in the upper chamber 6a, and the mineral oil is removed from the removal passage 12 connected to the upper side of the processing tank 6 while being treated. Of the hydraulic oil flows from the side opening 6c of the processing tank 6 into the processing flow path 1 and is returned to the hydraulic hydraulic oil supply tank (not shown).

[0023]

According to the emulsified oil separation device of the present invention as described above, the liquid to be treated is continuously flown through the flow path in the device to gradually enlarge the oil particles in the liquid to be treated. Since it is possible to separate them, the oil mixed in the emulsified state can be separated and removed efficiently in a short time.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing an embodiment of an emulsified oil separation device of the present invention.

FIG. 2 is a schematic explanatory view showing a main part in the embodiment shown in FIG.

[Explanation of symbols]

3 First Separator 3b Layer with the Finest Fiber Density (of the First Separator) 3c Layer with Medium Fiber Density (of the First Separator) 3d Layer with Coarse Coarse Fiber Density (of the First Separator) 4 Second Separator 4b ( Layer with the smallest fiber density (of the second separator) 4c Layer with a medium fiber density (of the second separator) 4d Layer with the coarsest fiber density (of the second separator)

Claims (1)

[Claims] 1. An emulsified oil separation device for separating and removing oil mixed in a liquid in an emulsified state, each of which is composed of lipophilic fibers, and the fiber diameter and the fiber density of each of them are stepwise. The first separator and the second separator that are changed are provided, and the liquid to be treated first changes the first separator from one with a large fiber diameter and coarse fiber density to one with a small fiber diameter and fine fiber density. After passing through, then the second separator,
To pass from the smaller fiber diameter and finer fiber density toward the larger fiber diameter and coarser fiber density,
An emulsified oil separation device in which a first separator and a second separator are sequentially arranged in a flow path of a liquid to be treated.