JP2019009036A - Organic solvent extraction device - Google Patents

Abstract

To reduce a leakage gas when a gaseous organic solvent is extracted from a member coated with an organic solvent or containing an organic solvent.SOLUTION: An organic solvent extraction device according to the present invention is provided with a water seal portion (9) on the side of an extraction tank (2) of an extractor (1), and opening and closing of the water seal portion (9) is interlocked by opening and closing a cover (5) which is a lid of the extraction tank (2), and the seal portion (9) is closed during operation of the extractor (1), and the inside of the extraction tank (2) is sealed, and when the cover (5) is opened during non-operation, the water seal portion (9) opens and the gas (50) is collected by a gas collection device (32) provided in the cover (5).SELECTED DRAWING: Figure 3

Description

  TECHNICAL FIELD The present invention relates to an organic solvent extraction apparatus, and in particular, a water seal portion provided between an extraction tank and a cover prevents leakage of operating gas to the outside, and raises the cover to raise the water seal portion. When the is opened, the present invention relates to a new improvement for recovering the gas outside.

  Conventionally used extractors include, for example, “Battery Separator Manufacturing Apparatus” of Patent Document 1. Although not shown in the figure, a duct tube type conveying device composed of a large number of rollers and tubes is provided in an extractor that forms a box shape of upper discharge, and a belt-like extruded sheet coated with a solvent is formed in a multilayer by the conveying device. This is a configuration that can be transported in a loop shape to minimize volatilization of harmful solvent applied to the extruded sheet being transported.

In addition, there are various types of this type of extractor, but any model requires an opening for device malfunction confirmation and maintenance. When the lid is closed, the internal organic solvent Both the function of shielding and the ease of opening and closing work are required. For example, the conventional configuration shown in FIGS. 5 and 6 is normally adopted, but in the case of the first conventional configuration shown in FIG. 5, the eaves portion 4 is provided in the upper opening 3 of the extraction tank 2 of the extractor 1. In order to cover the upper opening 3, a cover 5 having a handle 7 is placed via a packing 6 and a bolt 4 a provided on the flange 4.
Moreover, the strip-shaped member 8 which apply | coats or contains an organic solvent is provided in the tank 2a of the said extraction tank 2, and it is comprised so that it can convey with the conveying apparatus which apply | coated or contained the above-mentioned organic solvent.

6 is substantially similar to the conventional configuration shown in FIG. 5, the same reference numerals are used for the same or equivalent parts as in FIG. 5. Water seal portions 9 and 9 a are provided on both sides, and an inner wall 37 provided on the cover 5 having the handle 7 is located outside the upper opening 3.
On the intermediate plate 35 of the extraction tank 2, an outer wall 36 is vertically provided integrally or separately, and a seal water is provided between the outer walls 36 and the opening walls 3 a of the upper openings 3. Sealed water tanks 14 and 14a for storing W are respectively provided.

A water supply valve 21 for supplying the supply water W into the seal water tank 14a is provided on the outer surface of the outer wall 36, and the supply water W can be supplied to both the seal water tanks 14 and 14a. ing.
A drainage pump 25 is provided on the outer surface of the outer wall 36, and the operation of the drainage pump 25 immediately supplies the water in the rotary drive seal water tanks 14, 14 a to the water treatment facility 30 to purify the water (organic solvent). Etc.) can be performed.

JP 2002-346977 A

Since the conventional organic solvent extraction apparatus is configured as described above, the following problems exist.
That is, among the conventional configurations shown in FIGS. 5 and 6 described above, first, in the apparatus using the packing shown in FIG. 5, during use, the cover 5 is interposed by the packing 6 and the flange 4 is fastened by the bolt 4 a. Since the extractor 1 is in operation, the gas containing the organic solvent eluted from the member 8 does not leak to the outside and the confidentiality is completely maintained. However, depending on the deterioration of the packing 6, Leakage sometimes occurred.
However, when the cover 5 is removed and the internal member is taken out, the cover 5 is opened with the handle 7, so that the opening 3 is opened and the internal gas comes out at once. It was.

Further, in the conventional configuration shown in FIG. 6, the water seal portion 9 using the seal water 13 is provided instead of the above-described packing, and the water is replaced by the water supply valve and the drain pump 25, so that the inside of the extraction tank 2 It is not necessary to prepare parts that require as high accuracy as the packing for sealing, but the solvent (generally methylene chloride) in the extractor dissolves slightly in water, so the water can be replaced. If left untreated for a long time, the solvent concentration of the seal water rises, and each water seal part is an open top type, so divergence starts from the outside air side that is in direct contact with the outside air, and the working environment concentration in the factory deteriorates. .
For this reason, it is necessary to replace the water seal portion, and costs such as waste water treatment facilities and disposal costs are incurred.

  The present invention has been made to solve the above-described problems. In particular, the water seal portion provided between the extraction tank and the cover prevents leakage of operating gas to the outside, and the cover. An object of the present invention is to provide an organic solvent extraction device that can recover gas externally when the water seal portion is opened in the above state.

The organic solvent extraction apparatus according to the present invention extracts gas from a member in a state where an organic solvent is applied or contained through the extraction tank of the extractor, and a cover is openable or detachable at the upper opening of the extraction tank. In the organic solvent extraction apparatus having a freely provided configuration, a part of a water seal part provided on one side or both sides or the entire circumference of the cover, a cover projecting part having a gas recovery pipe, and the water seal part A cover edge that hangs down from the cover overhanging portion and forms an inner part of the cover, an inner wall that stands on the intermediate plate of the extractor and is located inside the extraction tank, and on the intermediate plate And an outer wall positioned on the outside of the extraction tank, and the extraction tank is closed by the cover in a state where water is contained in a seal water tank formed by the inner wall, the outer wall, and an intermediate plate. When A first gap between the lower end of the cover edge between the wall and the outer wall and the bottom of the intermediate plate is formed, and the inside and outside of the extraction tank are shielded by the water seal portion, and in the shielded state, the When the cover moves upward, the cover is separated from the extractor, and the gas is taken into the gas recovery device through the second gap between the lower end of the cover edge and the water surface. The height relationship between the cover edge height h ₁ of the cover edge, the inner wall height h ₂ of the inner wall, and the outer wall height h ₃ of the outer wall is h ₂ <h ₃ , h _1. = <H ₃ , and the cover is placed in the upper opening of the outer wall of the water seal portion, and the upper opening of the outer wall is in contact with the back surface of the cover overhanging portion. In the inner corner formed by the back surface, the gas A sealant for preventing leakage is provided, and a supply water pump for supplying water into the seal water tank is provided on the outer surface of the outer wall.

Since the organic solvent extraction apparatus according to the present invention is configured as described above, the following effects can be obtained.
That is, the gas from the member in which the organic solvent is applied or contained is led to the outside through the extraction tank of the extractor, and the upper opening of the extraction tank is configured to be provided with a cover that can be opened or closed. In the organic solvent extraction apparatus, a part of a water seal portion provided on one or both sides or the entire circumference of the cover, a cover overhang portion having a gas recovery pipe, and the cover overhang for forming the water seal portion A cover edge that hangs down from the part and forms the part, an inner wall that stands on the intermediate plate of the extractor and is located inside the extraction tank, and an outer wall of the extraction tank that stands on the intermediate plate And when the extraction tank is closed by the cover in a state where water is contained in a sealing water tank formed by the inner wall, the outer wall, and the intermediate plate, the inner wall And between the outer wall A first gap is formed between the lower end of the bar edge and the bottom of the intermediate plate, the inside and outside of the extraction tank are shielded by the water seal portion, and when the cover moves upward in the shielded state, the cover Is disposed away from the extractor, and the gas is taken into the gas recovery device via the second gap between the lower end of the cover edge and the water surface, thereby providing a local exhaust circuit installed on the outside air side. It is possible to collect the solvent that diverges to the outside air at the water seal part, and maintain the appropriate environmental concentration of the factory. Further, according to the present invention, it is necessary to replenish the sealing water that spontaneously evaporates. However, since a water treatment facility that requires initial costs and running costs is unnecessary, cost reduction can be expected.
Further, a general gas extractor circuit is installed in an extractor, and the present invention can be manufactured at a relatively low cost by simply connecting a water seal portion, which is a local exhaust circuit of the present invention, to existing ducts and pipes. Configurations can be added.
Further, the height relationship between the cover edge height h ₁ of the cover edge, the inner wall height h ₂ of the inner wall, and the outer wall height h ₃ of the outer wall is h ₂ <h ₃ , h _1. = <H ₃ , the extraction tank is closed when the cover is closed, and when the cover is opened, a gap is formed between the edge of the cover and the water surface, and the gas in the extraction tank is passed through this gap. It can be recovered.
The inner surface formed by the upper opening and the back surface in a state where the cover is placed in the upper opening of the outer wall of the water seal portion and the upper opening of the outer wall is in contact with the back surface of the cover overhanging portion. By providing the corner with the sealing agent for preventing the gas leakage, the sealing of the connection portion between the outer wall and the cover overhanging portion can be completed.
Further, a water supply pump for supplying water into the seal water tank is provided on the outer surface of the outer wall, so that it is possible to cope with natural reduction of water in the water seal portion.
It is a configuration.

It is a schematic perspective view which shows a part of organic solvent extraction apparatus by this invention. It is an expanded sectional view of the A section of FIG. It is an enlarged block diagram which shows the closed state of the water seal part of FIG. It is a block diagram which shows the open state of the water seal part of FIG. It is a schematic block diagram which shows the conventional organic solvent extraction apparatus. It is a schematic block diagram which shows the other conventional structure different from the structure of FIG.

  The organic solvent extraction apparatus according to the present invention prevents leakage of operating gas to the outside by a water seal portion provided between the extraction tank and the cover, and raises the cover to open the water seal portion. In this case, the gas is recovered outside.

DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of an organic solvent extraction apparatus according to the present invention will be described with reference to the drawings.
In addition, the same code | symbol is demonstrated to the part which is the same as that of a prior art example, or an equivalent part.
FIG. 1 is a perspective view showing an organic solvent extraction apparatus according to the present invention, and an extruder 1 is provided with a number of extraction tanks 2.

A cover 5 having a handle 7 is provided at the top of each extraction tank 2 so as to be openable and detachable. The waste gas in the extraction tank 2 passes through a gas recovery pipe 33 and is a gas pipe 31 for joint gas disposal. To the gas recovery device 32.
Part A showing the extraction tank 2 of the extractor 1 is shown enlarged in FIG.
The member 8 is transported to a tank 2a of the extraction tank 2 by a mounting table (not shown) and the organic solvent applied or contained in the member 8 is extracted. The extracted organic solvent is extracted from the tank 2a. The gas is sent from the pair of gas recovery pipes 33 provided on both sides of the cover 5 to the pair of gas recovery devices 32 and recovered.
The member 8 is, for example, a lithium ion battery separator, and the organic solvent is, for example, methylene chloride.

  Each of the small diameter gas recovery pipes 33 shown in FIG. 1 is connected to each of the large diameter gas recovery pipes 33a and is finally connected to the joint gas disposal gas pipe 31. However, the material of the flexible hose constituting each of the tubes 33, 33a, 31 is a fluororesin (in consideration of chemical resistance). Since the fluororesin is poor in flexibility, it must be removed when the cover 5 is opened and closed. For this reason, a one-touch joint (not shown) is employed.

3 shows only one of the pair of left and right water seal portions 9 provided in the extraction tank 2, and is an enlarged cross-section when the water seal portion 9 of FIG. 1 is sealed with water, that is, the cover 5 is closed. FIG. The pair of water seal portions 9 are configured identically as shown in FIG.
In FIG. 3, what is denoted by reference numeral 1 is the extractor, and an intermediate plate 35 having an L-shaped cross section is provided above the extraction tank 2 of the extractor 1. An outer wall 36 and an inner wall 37 for forming the sealing water tank 14a are formed.

It said outer wall height of the outer wall 36 is h _3, in the middle position on the outer wall 36, and the feed water pump 40 is provided for supplying water into the sealing water tank 14a, the supplying The water pump 40 may not be provided in a configuration in which water is poured manually.
An inner wall 37 having an inner wall height h ₂ that is lower than the outer wall 36 is formed integrally with the intermediate plate 35 and inside the outer wall 36.

On the upper opening 3 of the outer wall 36, the cover 5 having a cover-like shape is mounted on both side portions (only one is shown in FIG. 3 and both sides are shown in FIG. 2). The upper opening 3 is in contact with the back surface 41 a of the overhanging portion 41. 3 and 4 show only one side, and in some cases, it can be formed on the entire circumference of the extraction tank 2.
There is no problem if gas does not leak to the outside in the contact state between the upper opening 3 and the back surface 41a. However, in the case of leakage, for example, a solvent-resistant softening agent such as rubber made of polytetrafluoroethylene is used. An effective sealing function can be provided by providing the sealing agent 42 to be provided on the inner corner portion 80 formed by the upper opening 3 and the back surface 41a.

A cover edge 45 that hangs downward is provided integrally with or separately from the cover overhanging portion 41 on the back surface 41a of the cover overhanging portion 41 and at an intermediate position between the outer wall 36 and the inner wall 37. inner side wall height of the cover edge 45 is set at h _2.
The cover edge 45 forms a part 45 a of the water seal portion 9.
A lower end 45b of the cover edge 45 is not in contact with the bottom 14b of the sealing water tank 14a including the intermediate plate 35, and a first gap G is formed.

The relationship between the height of the cover edge h ₁ , the inner wall height h ₂ and the outer wall height h ₃ is h ₂ <h ₃ , h ₁ = <h ₃ , and the inside of the seal water tank 14a The water W filled in is configured so that the first gap G can be sealed with the water W.

In FIG. 3, since the cover 5 is closed and the water seal portion 9 is closed, the gas 50 emanating from the organic solvent of the member 8 is generated in the water seal portion 9 in the extraction tank 2 in operation. It is blocked and does not leak outside the extractor 1.
In addition, when the extractor 1 has been operating or stopped for a long time, the water W in the sealed water tank 14a may be somewhat reduced. In such a case, the supply water pump 40 is In the configuration provided on the outer wall 36, the feed water pump 40 is driven via a water level sensor (not shown), and when the water W reaches a predetermined water level, the drive of the feed water pump 40 is stopped. It is configured.

Next, when the operation of the extractor 1 is finished and the member 8 is taken out from the extraction tank 2, the handle 7 (shown in FIGS. 1 and 2) of the cover 5 in FIG. When lifted, as shown in FIG. 4, the cover 5 moves upward and the cover edge 45 is also integral with the cover 5, so that the cover edge 45 is formed between the lower end 45 b of the cover edge 45 and the water surface Wa. 2 gap _{G 1} is generated.

The generation of the second gap G _1, the gas 50 in the inner extraction vessel 2 is sucked by the process to the second gap G ₁ gas recovery pipe 33 connected to the gas recovery unit 32 via the.
The gas 50 tends to escape to the outside from the opening 70 formed between the lower end 41b of the cover projecting portion 41 and the outer wall 36. However, because the suction force of the gas recovery pipe 33 is strong, Waste to the outside can be reduced.
The water seal portion 9 is mainly composed of the inner side wall 37, the cover edge 45, the outer wall 36 and the intermediate plate 35, and the water seal portion 9 is provided on both sides or the entire circumference of the extraction tank 2 in FIG. You can also.

Next, the gist of the organic solvent extraction apparatus according to the present invention is as follows.
That is, the gas 50 from the member 8 in a state where the organic solvent is applied or contained is led to the outside through the extraction tank 2 of the extractor 1, and the cover 5 can be opened and closed or attached to the upper opening 3 of the extraction tank 2. In the organic solvent extraction apparatus having the configuration provided in the cover 5, a cover overhanging portion 41 having a part 45 a of the water seal portion 9 and a gas recovery pipe 33 provided on one side or both sides or the entire circumference of the cover 5; It hangs down from the cover overhanging portion 41 for forming the water seal portion 9 and stands on the cover edge 45 forming the part 45a and the intermediate plate 35 of the extractor (1). An inner wall 37 positioned on the inner side, and an outer wall 36 standing on the intermediate plate 35 and positioned on the outer side of the extraction tank 2, and formed by the inner wall 37, the outer wall 36, and the intermediate plate 35. Water W is stored in the seal tank 14a In this state, when the extraction tank 2 is closed by the cover 5, the second end 45 b of the cover edge 45 between the inner wall 37 and the outer wall 36 and the bottom portion 35 a of the intermediate plate 35 are 1 gap G is formed, the inside and outside of the extraction tank 2 are shielded by the water seal portion 9, and the cover 5 moves away from the extractor 1 when the cover 5 moves upward in the shielded state. the cover of the lower end 45b and the gas 50 via the second gap G ₁ between the water surface Wa is configured to to be taken to the gas recovery unit 32, also, the cover edge 45 of the cover edge 45 The height relationship between the edge height h ₁ , the inner wall height h ₂ of the inner wall 37, and the outer wall height h ₃ of the outer wall 36 is h ₂ <h ₃ , h ₁ = <h ₃ . And the cover 5 has the water channel. And is formed by the upper opening 3 and the back surface 41a in a state where the upper opening 3 of the outer wall 36 is in contact with the back surface 41a of the cover projecting portion 41. A sealing agent 42 for preventing the gas 50 from leaking is provided at the inner surface corner 80, and water W is supplied to the outer surface 36b of the outer wall 36 in the sealed water tank 14a. It is the structure by which the feed water pump 40 for supplying is provided.

  The organic solvent extraction apparatus according to the present invention is provided with a detachable cover at the opening of the extraction tank, and a water seal portion is provided on the cover by the cover edge of the cover overhanging portion 40 and the inner and outer walls provided in the extraction tank. By opening and closing the water seal portion, the gas can be recovered and leakage of the gas to the outside can be prevented.

DESCRIPTION OF SYMBOLS 1 Extractor 2 Extraction tank 2a In the tank 3 Upper opening 5 Cover 7 Handle 8 Member 9 Water seal part 14a Seal water tank 31 Gas pipe for joint gas disposal 32 Gas recovery apparatus 33 Gas recovery pipe 35 Intermediate | middle board 35a Bottom part 36 Outer side wall 37 Inner side Wall 40 Supply water pump 41 Cover overhanging portion 41a Back surface 42 Sealing agent 45 Cover edge 45a Partial 45b Lower end h ₁ Cover edge height h ₂ Inner wall height h ₃ Outer wall height G First gap G ₁ Second gap W Water Wa Water surface

Claims (4)

The gas (50) from the member (8) in a state where an organic solvent is applied or contained is led to the outside through the extraction tank (2) of the extractor (1), and the upper opening (3) of the extraction tank (2). In the organic solvent extraction apparatus having a structure in which the cover (5) is provided so as to be openable and detachable or detachable,
A cover projecting portion (41) having a part (45a) of a water seal portion (9) and a gas recovery pipe (33) provided on one side or both sides or the entire circumference of the cover (5), and the water seal portion (9) is suspended from the cover overhanging portion (41) to form the cover edge (45) forming the part (45a) and the intermediate plate (35) of the extractor (1). An inner wall (37) positioned inside the extraction tank (2), and an outer wall (36) standing on the intermediate plate (35) and positioned outside the extraction tank (2). ,
The extraction tank (2) is covered by the cover (5) in a state where water (W) is contained in a sealed water tank (14a) formed by the inner wall (37), the outer wall (36) and the intermediate plate (35). ) Is closed, the lower end (45b) of the cover edge (45) between the inner wall (37) and the outer wall (36) and the bottom (35a) between the bottom (35a) of the intermediate plate (35). 1 gap (G) is formed, the inside and outside of the extraction tank (2) are shielded by the water seal portion (9), and when the cover (5) moves upward in the shielded state, the cover ( 5) is separated from the extractor (1), and the gas (50) is passed through the second gap (G ₁ ) between the lower end (45b) of the cover edge (45) and the water surface (Wa). An organic solvent extraction device configured to be taken into the gas recovery device (32). The height relationship between the cover edge height h ₁ of the cover edge (45), the inner wall height h ₂ of the inner wall (37), and the outer wall height h ₃ of the outer wall (36) is h: _2. The organic solvent extraction device according to claim ₁ , wherein ₂ <h ₃ and h ₁ = <h ₃ .   The cover (5) is placed in the upper opening (3) of the outer wall (36) of the water seal portion (9), and the upper opening (3) of the outer wall (36) is placed in the cover overhanging portion (41). A sealing agent for preventing the gas (50) from leaking to the inner surface corner (80) formed by the upper opening (3) and the back surface (41a) in a state of being in contact with the back surface (41a). 42) The organic solvent extraction apparatus according to claim 1 or 2, wherein 42) is provided.   The outer surface (36b) of the outer wall (36) is provided with a supply water pump (40) for supplying water (W) into the sealed water tank (14a). 4. The organic solvent extraction device according to any one of items 3 to 3.

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