JP3242263B2 - Oil extractor of oil concentration measurement device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil extractor of an oil concentration measuring device for measuring an oil concentration in wastewater from various factories or sewage treatment plants, and more particularly, to an oil extractor for measuring oil content in sample water. The present invention relates to an oil extractor that performs an extraction operation of extracting an oil component in the sample water into an oil-in-water extraction solvent in advance for measurement.

[0002]

2. Description of the Related Art Generally, in an oil extractor provided in an oil concentration measuring device, a sample water containing an oil is added to an oil-in-water extraction solvent [for example, Cl (CF ₂ -C ₂ having a specific gravity of about 1.7).
(FCl) ₂ Cl or Freon (trade name; DuPont-113, or carbon tetrachloride) represented by the molecular formula of stirring and the oil content in the sample water is extracted into the solvent. A solvent in which the oil is dissolved is obtained.

As shown in FIG. 10, a conventional oil extractor is provided with an agitating tank 91 which is provided to vibrate up and down (A direction) and down (B direction) in the extraction tank 91. Attached to the rod 92 and the stirring rod 92, upward and downward (A.
B), a pair of upper and lower stirring blades 93 each vibrating in
Vibrator (AC1
00V) 95 and an alternating current (A.
The extraction operation was performed by performing the agitation with the vibration of the power supply frequency of C).

[0004]

However, since the power supply frequency of the alternating current is not common, and there are 50 Hz and 60 Hz, when using an oil extractor having the same structure,
It has been recognized that the extraction efficiency varies depending on the power supply frequency, and this vibration method generates considerable vibration and noise during the extraction operation. Further, in the conventional structure, the frequency and the vibration intensity are determined in advance, and only stirring corresponding to these is performed. Therefore, to improve the extraction efficiency, the structure itself needs to be considerably improved.

The present invention has been made in view of the above problems, and has as its object to reduce the vibration and noise generated during the extraction operation while always keeping the extraction efficiency constant, and to improve the extraction efficiency. An object of the present invention is to provide an oil extractor of a measuring device.

[0006]

In order to achieve the above object, an oil extractor of an oil concentration measuring apparatus according to the present invention comprises an oil extractor for measuring an oil content in a sample water. Extractor for performing an extraction operation of extracting oil with a water-in-oil extraction solvent, an extraction tank into which a sample water containing oil and an oil-in-water extraction solvent are injected, and a stirring rod rotatably provided in the extraction tank. A pair of upper and lower stirring blades respectively attached to the upper and lower positions of the stirring rod and rotating in the horizontal direction together with the stirring bar, and a motor for driving the stirring rod, and further comprising the pair of upper and lower stirring blades Each has a plurality of oil extraction blades, and the upper stirring blade plate
With the oil extraction blade facing down, extract oil from the lower stirring blade plate.
The blades are positioned upward .

The most significant feature of the present invention is that a pair of upper and lower stirring blade plates each having a plurality of oil extraction blades, each of which employs a stirring system coaxial with the rotation of the motor and rotates in a horizontal direction together with a stirring rod, is provided. , For extracting oil from upper stirring blades
With the blades pointing down, the oil extraction blades on the lower stirring blade plate pointing up
At the point where it is located.

In the present invention, first, the upper stirring blade plate
With the oil extraction blade facing down, extract oil from the lower stirring blade plate.
Since the blades are positioned upward , the stirring effect can be increased in that the collision between the sample water and the oil-in-water extraction solvent frequently occurs from both the upper stirring blade plate side and the lower stirring blade plate side.
Therefore, after the stirring, in the extraction tank, the sample water from which the oil was removed is located at the top, and the oil-in-water extraction solvent in which the oil in the sample water was dissolved is located at the bottom,
Extraction efficiency can be improved.

[0009] Therefore, in the present invention, each plurality of oil extraction blade direction and flow direction of oil extraction vanes are formed on the upper stirring vane 5 and the lower stirring vane 6 in the case of identical 4 And a plurality of oil extraction blades 6
a are positioned upward together as shown in FIG.
Instead , as shown in FIG. 6B, the oil extraction blade 4 is positioned downward and the oil extraction blade 6a is positioned upward.
You. That is, in the arrangement of the oil extraction blades 4 and 6a as shown in FIG. 6 (a), the sample water a and the oil-in-water extraction solvent c are provided only in one direction (for example, the H direction) during the stirring operation. In the form in which the sample water a and the oil-in-water extraction solvent c collide with each other in the two directions (for example, the I direction and the J direction) as shown in FIG. This is because the stirring effect is large in that it frequently occurs from both the side and the lower stirring blade plate 6 side. As a result, a required stirring effect can be obtained with a certain amount of water or more within a range that is hardly affected by the power supply frequency.

[0010] Next, in the present invention, since the stirring method coaxial with the rotation of the motor is adopted, the stirring rod of the oil extractor is also changed from a vertically vibrating stirring operation to a horizontal rotation stirring operation. The extraction efficiency can always be kept constant, and vibration and noise generated during the extraction operation can be reduced.

In addition, when a DC motor is used as a drive source for driving the stirring rod, for example, the power supply frequency can be shared.

Further, in the present invention, it is more preferable that a solvent refinement plate that rotates together with the stirring rod and the pair of upper and lower stirring blades at the time of stirring is provided at a position between the stirring blades.

That is, in the extraction operation using the oil extractor of the present invention, as shown in the operation order in FIGS. 5 (a), 5 (b) and 5 (c), a sample water a containing an oil
Is stirred by the rotating stirring rod 3 together with the pair of upper and lower stirring blades 5 and 6 and the solvent refinement plate 9 to extract the oil b into the solvent c.

More specifically, as shown in FIG. 6 (c), by disposing the solvent micronizing plate 9 at a position between the projecting pieces 4 and 6a, the solvent c can flow in the two directions. However, the solvent c after passing through the small holes 7a and 8a of the small hole groups 7 and 8 is finely divided into particles, respectively, in comparison with the case where a large lump flows without the solvent finer plate 9. After the stirring, the sample water a and the solvent c in which the oil b is dissolved can be reliably separated by the synergistic effect with the stirring effect.

As for the small hole groups 7 and 8 provided on the solvent micronizing plate 9 of the present invention, basically, as shown in FIG. 4, a plurality of groups 7 and 8 are provided and each small hole group is provided. 7,8
Diameter of small holes 7a and 8a is small (for example, 2 mm)
Is advantageous in that the solvent c is each finely divided into particles.

That is, in the comparative example of the solvent micronizing plate 29 having a diameter φ of 25 mm shown in FIG.
Although a single group 18 is shown, it is preferable to arrange such a plurality of groups 7 and 8 (see FIG. 4) instead of the single group 18 in that the solvent c is finely divided into particles.
Moreover, it was found that it is not preferable that the diameter of the small hole is large. That is, in the comparative example shown in FIG.
When small holes 18a having two kinds of diameters, m and 8 mm, were prepared and stirred, it was found that it was difficult to make the solvent c into fine particles. Also, as in the comparative example of the solvent refinement plate 39 having a diameter φ of 30 mm shown in FIG. 9, a plurality of groups 27, 8, 28, 8 are sequentially arranged from the center side to the outer periphery side of the solvent refinement plate 39. , 6mm, 5mm, 2
Small holes 28a, 27 having three different diameters of mm
It has also been found that the solvent c after passing through a and 8a cannot be miniaturized. In this case, even if there is a small hole 8a having a small diameter, the small holes 28a and 27a have a large diameter.
This is because a lump of the solvent c is removed.

Therefore, when the solvent refining plate that rotates together with the two stirring blade plates is attached to a position between the pair of upper and lower stirring blade plates, each small hole of the small hole group concentrically arranged on the solvent refining plate is provided. Each of the oil-in-water extraction solvents after passing through the holes is reliably miniaturized, and the contact area with the sample water can be increased as compared with the vibrator type. Therefore, the oil-in-water extraction solvent having a specific gravity greater than that of the sample water is formed into particles, so that the solvent is easily adapted to the sample water. As a result, in the extraction tank, since the stirring is performed in a state where the solvent particles are uniformly suspended throughout the sample water, the solvent particles easily dissolve the oil content in the sample water, and after the stirring, in the extraction tank, The sample water from which the oil has been removed is located at the top, and the oil-in-water extraction solvent in which the oil in the sample water is dissolved is located at the bottom, and the extraction efficiency can be further improved.

Specifically, the stirring operation when the solvent refinement plate 9 is provided is as follows. Before stirring, FIG.
As shown in the figure, the oil-in-water extraction solvent c is previously injected to a height not exceeding the solvent refinement plate 9 in the extraction tank 2,
As shown in FIG. 5B, after the stirring operation is performed by the stirring blades 5 and 6, the sample water a and the solvent c in which the oil b is dissolved are separated [see FIG. 5C]. ] To perform an extraction operation.

[0019]

An embodiment of the present invention will be described below. It should be noted that the present invention is not limited thereby. In FIG. 1 to FIG. 4, an oil extractor 1 of an oil concentration measuring device converts an oil b in a sample water a in advance into an oil-in-water extraction solvent [e.g. Cl (CF ₂ -CFC having a specific gravity of 0.7
l) A sample containing an oil component b, which is subjected to an extraction operation of extracting with chlorofluorocarbon represented by the molecular formula of ₂ Cl, Freon (trade name; DuPont) -113, or carbon tetrachloride) c. An extraction tank 2 into which water a and a solvent c for oil-in-water extraction are injected, a stirring rod 3 rotatably provided in the extraction tank 2, and a plurality of oil extraction blades 4,6.
a in the radial direction (R direction), and the vertical position P,
A pair of upper and lower stirring blades 5 and 6 respectively attached to Q and rotating in the horizontal direction (S direction) together with the stirring rod 3;
A group of small holes 7 and 8 each composed of a plurality of small holes 7a and 8a is provided in two rows concentrically, and is mounted at a position T between the stirring blades 5 and 6 of the stirring rod 3, and the stirring rod 3 and the vertical A solvent refinement plate 9 that rotates together with the pair of stirring blade plates 5 and 6 to refine the oil-in-water extraction solvent after passing through the small hole groups 7 and 8 and a DC motor (12 VD .
C, 5500r. p. m: 3800 r. p.
m: at the time of injection, extraction time 40 seconds) M.

Further, the solvent refinement plate 9 in the extraction tank 3 has a function as a partition plate for indicating a partition surface 10 for separating the sample water a containing the oil component b and the oil-in-water extraction solvent c. Previously, the oil-in-water extraction solvent c was previously injected to a height not exceeding the solvent refinement plate 9 in the extraction tank 3,
The injection volume ratio between the sample water a containing the oil component b and the oil-in-water extraction solvent c is approximately 2: 1 (20 ml (milliliter): 10 m
l). In short, the solvent refinement plate 9 has a function as an instruction plate for instructing an injection amount of the oil-in-water extraction solvent c.

The plurality of oil extraction blades 4 of the upper stirring blade plate 5 and the plurality of oil extraction blades 6a of the lower stirring blade plate 6 are provided.
Are formed so as to protrude toward the side where the solvent refinement plate 9 is located, and the sample water a and the oil-in-water extraction solvent c can be stirred by the oil extraction blade 4 and the oil extraction blade 6a.

In this embodiment, the length L of the blades 4 and 6a is set to about 7 mm (see FIG. 2), and the solvent refinement plate 9 has a diameter D of 25 mm. Each of the small holes 7a and 8a formed in the plate 9 has a diameter of 2 mm (see FIG. 4). In FIG. 1, reference numeral 11 denotes an inlet for sample water a and an oil-in-water extraction solvent c, and 12 denotes an inlet. Belts for transmitting the drive from the DC motor M, 13 and 14 are pulleys around which the belt 12 is wound, and 15 is a sliding bearing.

Further, the stirring rod 3 of the oil extractor 1 is also changed from a stirring operation by a vibrator type (alternating current) with a vertical vibration to a stirring type (direct current) rotating in the horizontal direction, so that the extraction efficiency can be always kept constant. Vibration and noise generated during the extraction operation can be reduced.

Further, this embodiment has the above-mentioned structure and uses the DC motor M as a drive source for driving the stirring rod 3, so that the power supply frequency can be made common.

In this embodiment, a pair of upper and lower stirring blades 5 and 6 that rotate in the horizontal direction together with the stirring bar 3 are provided, and the stirring blades 5 and 6 are located between the stirring blades 5 and 6. The solvent c for extracting oil-in-water after passing through the small holes 7a, 8a of the small hole groups 7, 8 concentrically arranged on the solvent fine plate 9 because the solvent fine plate 9 that rotates together with the solvent is attached. Are reliably miniaturized, and the contact area with the sample water a can be increased as compared with the vibrator type. Therefore, the oil-in-water extraction solvent c having a higher specific gravity than the sample water a is formed into particles, and is easily adapted to the sample water a. As a result, in the extraction tank 2, since the stirring is performed in a state where the solvent particles are uniformly suspended over the entire sample water a, the solvent particles easily dissolve the oil component b in the sample water a, and after the stirring, In the extraction tank 2, the sample water a from which the oil component c is removed is located at the upper part, and the oil-in-water extraction solvent c in which the oil component b in the sample water a is dissolved is located at the lower part. Can be improved.

Table 1 shows a comparison of the extraction efficiencies of various fats and oils.

[0027]

[Table 1]

From Table 1, it can be seen that the extraction efficiency of the agitated oil extractor of this embodiment is about 10% higher than that of the conventional vibration type on average.

On the other hand, the mounting structure of the oil extractor to the case of the oil concentration measuring device main body has conventionally been such that the oil extractor alone cannot be easily removed as a unit. That is, conventionally, the oil extractor has a complicated mounting structure in which the oil extractor itself cannot be easily removed unless the cock or other unit provided in the oil concentration measurement device is removed. Although the maintenance was extremely bad, the oil extractor 1 of this embodiment
As shown in FIG. 7, the unit structure is attached to the oil concentration measuring device main body case 21 via the one-touch coupler 20 made of resin, so that the attachment structure is more advantageous than before.

That is, in this embodiment, since the oil extractor 1 is united and fixed by the one-touch coupler 20 made of resin, the oil extractor 1 can be easily removed by pulling the one-touch coupler 20 made of resin. You can now remove it.

[0031]

As described above, the oil extractor of the oil concentration measuring device of the present invention is first provided on a pair of upper and lower stirring blades which rotate horizontally with the stirring rod.
Of the blades, the oil extraction blades of the upper stirring blade plate face down,
Since the oil extraction blade of the lower stirring blade plate is positioned upward, collision of the sample water and the oil-in-water extraction solvent frequently occurs from both the upper stirring blade plate side and the lower stirring blade plate side. The effect of agitation can be increased at the point of occurrence. As a result, a required stirring effect can be obtained with a certain amount of water or more that is hardly affected by the power supply frequency. Therefore, after stirring, the sample water from which oil was removed is located in the upper part of the extraction tank, and the oil-in-water extraction solvent that dissolves the oil in the sample water is located in the lower part, improving the extraction efficiency. it can.

Next, in the present invention, a stirring method coaxial with the rotation of the motor is employed, so that the stirring rod of the oil extractor is also changed from a vertically vibrating stirring operation to a horizontal rotation stirring operation. The extraction efficiency can always be kept constant, and vibration and noise generated during the extraction operation can be reduced.

When a DC motor is used as a drive source for driving the stirring rod, for example, a common power supply frequency can be used.

Further, when a solvent refining plate that rotates together with the two stirring blade plates is mounted at a position between the pair of upper and lower stirring blade plates, each small hole of the small hole group concentrically arranged on the solvent refining plate is provided. Each of the oil-in-water extraction solvents after passing through the holes is reliably miniaturized, and the contact area with the sample water can be increased as compared with the vibrator type. Therefore, the oil-in-water extraction solvent having a specific gravity greater than that of the sample water is formed into particles, so that the solvent is easily adapted to the sample water. As a result, in the extraction tank, since the stirring is performed in a state where the solvent particles are uniformly suspended throughout the sample water, the solvent particles easily dissolve the oil content in the sample water, and after the stirring, in the extraction tank, The sample water from which the oil has been removed is located at the top, and the oil-in-water extraction solvent in which the oil in the sample water is dissolved is located at the bottom, and the extraction efficiency can be further improved.

[Brief description of the drawings]

FIG. 1 is a configuration explanatory view showing one embodiment of the present invention.

FIG. 2 is a view showing an upper stirring blade plate in the embodiment.

FIG. 3 is a view showing an upper stirring blade plate in the embodiment.

FIG. 4 is a view showing a solvent refinement plate in the above embodiment.

FIG. 5 is a diagram showing an extraction operation in the embodiment.

FIG. 6 is a diagram for explaining the function and effect of the embodiment.

FIG. 7 is a diagram showing a mounting structure of the oil extractor to the oil concentration meter main body case in the embodiment.

FIG. 8 is a diagram showing a comparative example of a solvent refinement plate.

FIG. 9 is a view showing another comparative example of the solvent refinement plate.

FIG. 10 is a configuration explanatory view showing a conventional example.

[Explanation of symbols]

1 ... oil extractor, 2 ... extraction tank, 3 ... stirring rod, 4, 6a ...
Oil extraction blades, 5, 6 ... a pair of upper and lower stirring blade plates, 7,
8: Small hole group, 7a, 8a: Small hole, 9: Solvent micronizing plate,
M: motor, a: sample water containing oil, b: oil, c: chlorofluorocarbon (solvent for oil-in-water extraction).

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-60-248233 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B01D 11/00-11/04

Claims (3)

(57) [Claims] 1. An oil extractor for extracting an oil component in a sample water with a solvent for extracting an oil-in-water component in advance to measure the content of the oil component in the sample water. An extraction tank into which the solvent is injected,
A stirring rod rotatably provided in the extraction tank, a pair of upper and lower stirring blades attached to upper and lower positions of the stirring rod and rotating in a horizontal direction together with the stirring rod, and a motor for driving the stirring rod DOO comprising a further comprises the pair of upper and lower stirring blades each of the plurality of oil extraction blade, upper stirring
With the blades for oil extraction on the slats facing downward,
An oil extractor of an oil concentration measurement device in which the blade for extracting oil is positioned upward . 2. A group of small holes composed of a plurality of small holes, each of which has a concentric shape and rotates together with a stirring rod and a pair of upper and lower stirring blades at the time of stirring to extract an oil-in-water component after passing through each of the small hole groups. The oil extractor of the oil concentration measurement device according to claim 1, wherein a solvent refinement plate capable of refining the solvent is attached at a position between the stirring blade plates. 3. The solvent refining plate in the extraction tank has a function as an indicating plate for instructing the injection amount of the oil-in-water extraction solvent, and the oil-in-water extraction solvent is placed in the extraction tank before stirring. The injection volume ratio between the sample water containing oil and the oil-in-water extraction solvent is set to approximately 2: 1 before injection to a height not exceeding the solvent micronizing plate. Oil extractor of the oil concentration measurement device of Japan.