JP2003144806A - Apparatus for separating organic solvent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an organic solvent separating apparatus the structure of which is simplified for separating an organic solvent from water continuously and the operation efficiency of which is enhanced by simplifying the separating operation. SOLUTION: This apparatus 1 is constituted of a separating tank 2 for separating the mixed liquid of the organic solvent with water into the organic solvent and water, a flow passage 3 for forming a flow passage of the mixed liquid, another flow passage 4 for discharging the separated water to the outside and one more flow passage 5 for discharging the separated organic solvent to the outside. The mixed liquid is made to flow along a flow straightening plate 6 arranged for forming the passage 3 and collide with the bottom wall 2e of the tank 2 so that the organic solvent is separated roughly from water. The roughly separated organic solvent of larger specific gravity is made to flow along a bent part 6b of the plate 6, flows on the wall 2e in the horizontal direction, introduced into the passage 5 and discharged to the outside from a discharge pipe 20. The separated water is made to float in the upper part of the organic solvent, introduced into the passage 4 and another flow passage 40 and discharged to the outside from another discharge pipe 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic solvent separation method in which a mixed liquid in which an organic solvent is mixed with water is continuously separated by utilizing the difference in specific gravity between them, and water and the organic solvent are discharged. It relates to the device.

[0002]

2. Description of the Related Art Conventionally, precision machining parts and electric parts are machined in factories and the like. However, oil is attached to the machined product, and when the oil is attached, the product is regarded as a product. Since it is not handled, the finishing process is usually performed after the machining process. In the finishing process, the product is mainly washed, but an organic solvent is used as a cleaning agent. Hydrocarbon-based solvents, chlorine-based solvents, and freon-based solvents are known as organic solvents, but especially for cleaning electronic, electrical, and mechanical parts, chlorine-based solvents that have high cleaning properties and heat resistance. For example, trichlorethylene is widely used. In the finishing process, the organic solvent is used together with water, and a large amount of mixed liquid with the organic solvent mixed in with water is generated, but since this mixed liquid cannot be directly discharged to the outside, the water and organic solvent are separated. Processing is required. However, at present, the used organic solvent generated in factories is generally taken as an untreated state containing water, etc. and treated by a waste liquid treatment company, but it has a considerable capacity. is there.

As a means for separating the organic solvent and the water from the mixed liquid in which the organic solvent is mixed with the water, there are methods such as distillation treatment and activated carbon treatment, and the separation treatment is performed. Further, in JP-A-2000-319206, in the presence of water, a chelating agent is added to an organic solvent which is incompatible with water, and the mixture is stirred and left to stand for two-phase separation. A method for purifying an organic solvent for separating parts is disclosed.

[0004]

As described above, since the used organic solvent generated in the factory is collected by the waste liquid treatment company while containing a large amount of water, the transportation and treatment of a large amount of water, etc. Is a waste of work and is not efficient. Further, in the method of treating water by separating water and organic solvent by distillation treatment or activated carbon treatment, such an apparatus becomes complicated, and there is a possibility that a large amount of cost will be required when manufacturing or purchasing. Further, in the method for purifying an organic solvent disclosed in JP-A-2000-319206, it is necessary to add a chelating agent to a mixed liquid and perform stirring, which may complicate the separation work. Since it takes a long time to stand, it requires a great deal of time to separate water and an organic solvent, and there is still room for improvement.

The present invention has been made in view of the above points, and an organic solvent separation device for continuously separating an organic solvent and water with a simple structure and improving work efficiency such as simplification of separation work. The purpose is to provide.

[0006]

As a means for solving the above-mentioned problems, the present invention is directed to an organic solvent separating apparatus according to claim 1, in which the flow of a mixed liquid in which an organic solvent is mixed with water. A passage, a flow path for discharging each of the separated organic solvent and water, a bent portion is formed at a lower end portion thereof, and a separation rectifying plate forming a flow path for directing the mixed liquid downward,
It is characterized in that a separation tank for separating water and an organic solvent from the mixed solution by utilizing a difference in specific gravity is provided. With such a configuration, the organic solvent, for example, a mixed liquid of trichlorethylene and water, flows downward along the separation rectifying plate having the bent portion at the lower end and collides with the bottom wall of the separation tank. , The molecules of the organic solvent and the water molecules are aggregated to be in a state of coarse separation. Then, the organic solvent having a large specific gravity remains at the bottom of the separation tank, the water floats above the organic solvent, and the water and the organic solvent can be separated in the separation tank.

According to a second aspect of the invention, in the invention according to the first aspect, the separation / rectifying plate directs an end portion of the bent portion in a substantially horizontal direction and in a lateral direction of the separation tank. It is characterized in that it is extended. With this configuration, the organic solvent having a large specific gravity flows horizontally along the end of the bent portion of the separation rectifying plate at the bottom of the separation tank, so that the water floats above the organic solvent. Flow to.

According to a third aspect of the present invention, in the invention according to the first or second aspect, an organic solvent discarding channel for discharging the separated organic solvent to the outside is formed at a position below the bottom of the separation tank. It is characterized by doing. With this configuration, the organic solvent that horizontally flows through the bottom of the separation tank has a large specific gravity, and thus is easily guided to the organic solvent disposal flow channel formed below the bottom of the separation tank. It is discharged to the outside.

According to a fourth aspect of the present invention, in the invention according to the third aspect, the separation tank extends in the lateral direction of the separation tank, and a lower end portion of the separation tank is the organic solvent disposal flow path. A partition wall that is separated from the bottom of the partition wall is formed, and a drainage channel that discharges the separated water to the outside is formed outside the partition wall. With this configuration, the partition wall allows the water floating above the separated organic solvent to be easily guided to the drainage channel and discharged to the outside.

According to a fifth aspect of the present invention, in the invention according to the fourth aspect, a mixing prevention plate is provided in a lateral direction of the separation tank so as to partition the drainage flow path and the organic solvent waste flow path. It is characterized in that it is extended. Since the drainage flow path and the organic solvent disposal flow path are partitioned by this mixing prevention plate, it is possible to prevent the separated organic solvent and water from being mixed again.

According to a sixth aspect of the present invention, in the invention according to the fourth or fifth aspect, the adsorbent is extended in the lateral direction of the separation tank at a position close to the outside of the drainage channel. It is characterized in that it is provided. Since the adsorbent is arranged in the drainage flow path adjacent to the outside, the adsorbent adsorbs foreign substances adhering to the separated water, organic solvent not separated, and the like,
Can be removed.

The invention described in claim 7 relates to claims 1 to 6.
In any one of the inventions described above, a filter for filtering the mixed solution is disposed in the vicinity of an inflow port into which the mixed solution flows, extending in the lateral direction of the separation tank. With this configuration, it is possible to eliminate solid substances such as metal scrap mixed in the mixed liquid.

The invention described in claim 8 is the invention according to claims 1 to 7.
In any one of the inventions described above, a movable means is attached to the lower part of the separation tank. With this configuration, the organic solvent separation device can be easily moved, and the handling becomes simple.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an organic solvent separator according to an embodiment of the present invention will be described in detail with reference to FIGS. As shown in FIGS. 1 to 3, the organic solvent separation device 1 is
Separation tank 2 for separating a mixed solution of organic solvent such as trichlorethylene and water (hereinafter referred to as a mixed solution) by the difference in specific gravity, a mixed solution flow path 3 into which the mixed solution flows, and a wastewater for discharging the separated water to the outside. The flow path 4 and the organic solvent disposal flow path 5 for discharging the separated organic solvent to the outside are roughly configured.

First, the separation tank 2 is a metal box made of stainless steel, and is formed in a predetermined length (width length <vertical length <front-back length) in the front-rear direction, the up-down direction, and the width direction, and is formed inside. The mixed liquid of a predetermined volume is separated and temporarily stored. Further, in the front of the upper wall 2b formed in the separation tank 2, a mixed liquid receiving port 2a having a substantially rectangular opening is formed.
And a projecting portion 2c projecting upward is formed on the outer peripheral edge of the receiving port 2a.

The separating / rectifying plate 6 is a plate-like separating / rectifying descending portion 6a having a predetermined height, and a bent portion 6b at a lower end thereof.
And are arranged so as to extend in the width direction of the separation tank 2. The separation rectifying descending portion 6a is fixed at its one end on the short side on the back surface in the width direction of the upper wall 2b of the separation tank 2 at a position continuous from the rearward projecting portion 2c of the receiving port 2a, and directly below. It is oriented. In addition, the bent portion 6b formed at the lower end portion of the separating / rectifying plate 6 has the separating / rectifying descending portion 6
The bent portion 6b is formed so as to be bent inward of the separation tank 2 continuously from a, and the end portion 6c of the bent portion 6b is formed to be oriented in the horizontal direction. Further, the curved shape of the bent portion 6b causes the mixed liquid to flow down along the separating / rectifying descending portion 6a and collide with the bottom wall 2e formed in the separation tank 2, so that the organic solvent of the mixed liquid is separated from the separation tank 2. The water is formed so as to flow along the bottom wall 2e and float above the organic solvent.
Further, between the separating / rectifying descending portion 6a and the front wall 2d formed in the separation tank 2, a plate-shaped filter 10 having a plurality of small holes is separated at a position substantially flush with the liquid surface 11. The tank 2 is provided laterally in the width direction, and both longitudinal end portions are fixed to the front wall 2d and the separating / rectifying descending portion 6a. In this way, the front wall 2 of the separation tank 2
A mixed liquid flow path 3 extending in the width direction of the separation tank 2 is formed between d and the separating / rectifying descending portion 6a.

Further, the organic solvent waste flow path 5 for discharging the separated organic solvent to the outside has a front-rear length substantially equal to the front-rear length of the drainage flow path 4 which will be described in detail later, and the bottom wall of the separation tank 2 is provided. It is formed at a position one step lower than 2, and is formed at a central position in the width direction of the separation tank 2 so as to project toward the ground side with a predetermined curvature.
In addition, the curved bottom wall 5a below the organic solvent disposal flow path 5
Is formed so as to be continuous from the bottom wall 2e of the separation tank 2,
The rear wall 5b of the organic solvent disposal flow path 5 is formed so as to continuously extend upward from the rear end of the curved bottom wall 5a. The organic solvent disposal flow path 5 communicates with a discharge pipe 20 for discharging the organic solvent to the outside via the rear wall 5b.

Further, the partition wall 7 is plate-shaped and is arranged in the width direction of the separation tank 2 so as to stand upright, and one end on the long side is fixed to the rear end portion of the upper wall 2b of the separation tank 2. At the same time, the other end 7a on the longitudinal side is arranged so as to be spaced a predetermined distance from the curved bottom wall 5a of the organic solvent waste flow path 5. The drainage channel 4 extends in the width direction of the separation tank 2 on the rear side of the partition wall 7, and the rear wall 4a is provided so as to close the drainage channel 4 (separation tank 2) on the rear side. The lower end of the formed rear wall 4a is fixed to the upper end of the rear wall 5b of the organic solvent waste flow path 5 and the rear end of the bottom wall 2e of the separation tank 2.

Further, the mixing prevention plate 8 is plate-shaped and has a front-rear length approximately the same as the front-rear length of the drainage flow path 4, and partitions the drainage flow path 4 and the organic solvent waste flow path 5. As described above, the organic solvent waste flow path 5 is laterally provided in the width direction of the separation tank 2 at a predetermined height from the lower end of the curved bottom wall 5a, and one end on the long side is disposed in the drainage path 4 (separation tank 2 ) Is fixed to the rear wall 4a.
Further, a filter 13 having a plate-like shape and having a plurality of small holes is horizontally provided above the drainage flow path 4 in the width direction of the separation tank 2, and both longitudinal end portions are fixed to the partition wall 7 and the rear wall 4a. There is. The adsorbent 9 having a substantially rectangular cross section, such as glass wool, is placed on the filter 13 such that the upper surface thereof is substantially flush with the liquid surface 11.

Further, a drainage flow channel 40 is arranged outside the rear wall 4a of the drainage flowpath 4 so as to extend in the width direction of the separation tank 2. A communication gap 4b is formed above the rear wall 4a so that the drainage flow paths 4 and 40 communicate with each other, and the drainage flow path 40 is exposed to the outside through a communication hole 40b formed in the front side wall 40a. It communicates with a discharge pipe 21 for discharging water. Further, above the drainage flow path 4, a plate-like lid 22 is provided horizontally in the width direction of the separation tank 2 so as to close the drainage flow path 4, and the upper wall 2b and the upper wall of the drainage flow path 40 are provided. It is mounted on 40c. Further, four casters 12 of movable means are fixed to the bottom wall 2e of the separation tank 2 at predetermined intervals,
The organic solvent separation device 1 can be moved.

Next, the flow from the inflow of the mixed liquid to the discharge of each of the organic solvent and water in the organic solvent separation apparatus thus constructed will be described with reference to FIG. First, water is stored up to the height of the filter 10 arranged in the mixed liquid flow path 3. Next, when a mixed liquid having a predetermined volume is flown into the receiving port 2a, foreign substances are filtered from the mixed liquid by the filter 10 in the mixed liquid flow path 3, and the mixed liquid flows along the separation rectifying plate 6. Run down. The mixed liquid that has flowed down collides with the bottom wall 2e of the separation tank 2 and separates the rectifying plate 6
It reaches near the bottom wall 2e of the separation tank 2 along the bent portion 6b.

Then, as shown by arrows 51 and 52, the organic solvent having a large specific gravity and the water having a small specific gravity are separated, and the organic solvent having a large specific gravity follows the bottom wall 2e of the separation tank 2 as shown by the arrow 52. As described above, it flows to the rear of the separation tank 2 and flows into the organic solvent waste flow path 5. Then, the organic solvent that has flowed into the organic solvent disposal flow path 5 is discharged to the outside from the discharge port 20 via the curved rear wall 5b of the organic solvent disposal flow path 5. Further, as shown by the arrow 51, the water separated from the mixed solution is
The separated organic solvent flows so as to float above and flows into the drainage channel 4. Further, the separated water is filtered again for foreign matter by the filter 13 arranged in the drainage channel 4,
Most of the organic solvent that has not been separated is adsorbed through the adsorbent 9, flows into the discharge passage 40 through the communication gap 4b, and is discharged to the outside from the discharge port 21 through the communication hole 40b of the front side wall 40a. It As described above, the mixed solution of the organic solvent and the water is separated by the difference in specific gravity, and the separated water is separated again by the filter or the adsorbent,
The content of the organic solvent can be further reduced.

The bent portion of the separating / rectifying plate may be formed in a curved shape having a predetermined curvature, or a combination of a plurality of straight lines having different inclination angles and a curve having a predetermined curvature. You may form it. Furthermore, although the number of adsorbents arranged in the drainage flow path is one here, it is possible to set an appropriate number of adsorbents according to the content rate of the organic solvent contained in the water separated in the drainage flow path. Good. Furthermore, before and after the separation layer,
The width and the outer dimension in the vertical direction are appropriately set in relation to the volume of the mixed liquid to be treated.

[0024]

As described above, according to the invention described in claim 1, a separation tank for separating water and an organic solvent from an organic solvent, for example, a mixed liquid of trichlorethylene and water by utilizing a difference in specific gravity is provided. In this separation tank, a flow path for directing the mixed liquid downward is formed by a separation rectifying plate having a bent portion at its lower end, so that the mixed liquid flows downward along the separation rectifying plate. And collide with the bottom surface of the separation tank, and the particles of the organic solvent and the water particles are agglomerated to be in a roughly separated state. Then, the organic solvent having a large specific gravity remains at the bottom of the separation tank, and the water floats above the organic solvent,
Water and the organic solvent can be separated in the separation tank.

According to the invention described in claim 2, since the end of the bent portion of the separating / rectifying plate is oriented in a substantially horizontal direction, the organic solvent having a large specific gravity is arranged along the end of the bent portion. Flow horizontally in the bottom of the separation tank, and the water flows so as to float above the organic solvent.

According to the third aspect of the present invention, the organic solvent having a large specific gravity is guided to the organic solvent discarding passage formed below the bottom of the separation tank and easily discharged to the outside. .

According to the invention described in claim 4, since the partition wall extends in the lateral direction of the separation tank, the lower end portion of the partition wall is arranged at a position separated from the bottom portion of the organic solvent waste flow path. The water floating above the separated organic solvent can be easily guided to the drainage channel arranged outside the partition wall and discharged to the outside.

According to the invention described in claim 5, since the drainage channel and the organic solvent disposal channel are partitioned by this mixing prevention plate, the separated organic solvent and water are prevented from being mixed again. be able to.

According to the invention described in claim 6, since the adsorbent is arranged in the drainage channel adjacent to the outside, the adsorbent is a foreign substance attached to the separated water, an organic solvent which is not separated, or the like. Can be adsorbed and removed.

According to the invention described in claim 7, since the filter for filtering the mixed liquid is arranged in the vicinity of the inflow port into which the mixed liquid flows, solid matters such as metal waste mixed in the mixed liquid are eliminated. can do.

According to the invention described in claim 8, since the movable means is attached to the lower part of the separation tank, the organic solvent separation device can be easily moved and the handling is simplified.

[Brief description of drawings]

FIG. 1 is a plan view of an organic solvent separation device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line AA of FIG.

FIG. 3 is a side view of an organic solvent separation device according to an embodiment of the present invention.

[Explanation of symbols]

1 Organic solvent separator 2 separation tanks 3 mixed liquid flow path 4 drainage channels 5 Organic solvent waste flow path 6 Separate rectifying plate 6b Bend 7 partition 8 Mixing prevention plate 9 Adsorbent 12 casters 10, 13 filter

Front page continuation (51) Int.Cl. ⁷ identification code FI theme code (reference) B01D 17/032 B01D 17/032 C07B 63/00 C07B 63/00 B C07C 17/38 C07C 17/38 21/10 21 / 10 (72) Inventor Legok Kan, Ho Chi Minh City, Vietnam, District 1, Nguyen Tran Trak 33 E (72) Inventor Hidefumi Matsumoto 1877-7 Shimokurata-cho, Totsuka-ku, Yokohama-shi F-term (reference) 4H006 AA04 AD16

Claims (8)

[Claims] 1. A flow path for a mixed solution in which water is mixed with an organic solvent, a flow path for discharging each of the separated organic solvent and water, and a bent portion is formed at a lower end portion of the mixed solution. An organic solvent separator comprising: a separation rectifying plate that forms a flow path directed downward; and a separation tank that separates water and an organic solvent from the mixed liquid by utilizing a difference in specific gravity. 2. The separation rectifying plate is arranged such that the end of the bent portion is oriented substantially horizontally and is extended in the lateral direction of the separation tank. The organic solvent separator described. 3. The organic solvent separating apparatus according to claim 1, wherein an organic solvent discarding passage for discharging the separated organic solvent to the outside is formed at a position below the bottom of the separation tank. . 4. A partition wall is formed in the separation tank, the partition wall extending in a lateral direction of the separation tank and having a lower end portion separated from a bottom portion of the organic solvent disposal flow channel, and the partition wall is provided outside the partition wall. The organic solvent separation device according to claim 3, wherein a drainage flow path for discharging the separated water to the outside is formed. 5. The mixing prevention plate is arranged so as to extend in the lateral direction of the separation tank so as to partition the drainage flow path and the organic solvent waste flow path. The organic solvent separator described. 6. The organic solvent according to claim 4, wherein an adsorbent is provided so as to extend in the lateral direction of the separation tank at a position close to the outside of the drainage channel. Separation device. 7. A filter for filtering the mixed solution is disposed in the vicinity of an inflow port into which the mixed solution flows, extending in the lateral direction of the separation tank. The organic solvent separator according to any one of 1. 8. The organic solvent separation apparatus according to claim 1, wherein a movable means is attached to the lower part of the separation tank.