KR100724322B1 - Distillation equipment for dry cleaner - Google Patents

Abstract

assignment

Reducing the number of parts achieves cost reduction and space savings.

Resolution

The condenser coil 19 for condensing and liquefying the vaporized solvent gas in the distillation kiln 10 is disposed in the buffer tank 27 for the storage of the solvent, and the ejector 22 for sucking the condensed solvent is provided. The cooling coil 25 for suppressing the temperature rise of the solvent circulating in the regeneration solvent circulation flow path 26 provided with is also disposed in the buffer tank 27. The solvent returned from the regeneration solvent circulation flow path 26 to the buffer tank 27 is first cooled in the cooling coil 25, and the solvent having a lowered temperature is introduced into the condensation coil 19 by performing heat exchange with the condensation coil 19. The prepared solvent gas is cooled and condensed. This eliminates the need for a condenser each having a conventional condensation coil and a cooling coil.

Dry cleaners, distillation units, solvents

Description

Distillation apparatus for dry cleaners {DISTILLATION EQUIPMENT FOR DRY CLEANER}

1 is a block diagram of a main part centered on a pipe path of a dry cleaner using an distillation apparatus according to an embodiment of the present invention.

2 is a configuration diagram mainly on a pipe route of the distillation apparatus of this embodiment.

3 is a schematic external plan view of the distillation apparatus of this embodiment.

4 is a configuration diagram centering on a piping path of a conventional distillation apparatus.

Explanation of the sign

10 distillation kilns

11 heating chamber

12 solvent supply euro

13 Solvent Supply Valve

14 Steam Supply Line

15 steam supply valve

16 steam discharge line

17 solvent gas flow path

19 condensation coil

20 check valve

21 Regenerative Solvent Valve

22 ejector

23 vacuum pump

25 cooling coil

26 regeneration solvent circulation flow path

27 buffer tank

271 first boundary wall

272 second boundary wall

273 cylindrical bulkhead

274 Regeneration Solvent Inlet

275 Regeneration Solvent Outflow Stage

28 Purification solvent outflow passage

29 piping

44 distillation apparatus

45 chiller

Japanese Patent Laid-Open No. 7-289788

The present invention relates to a distillation apparatus for purifying various solvents used as dry cleaners.

As a dry cleaner used in a cleaning store or the like, for example, as described in Patent Document 1, a vacuum distillation apparatus for purifying a solvent in order to repeatedly use a solvent (silicone oil, a petroleum solvent, etc.) soiled by washing laundry is provided. It is used. 4 is a schematic configuration diagram centering on a pipe of a conventional general distillation apparatus described in the literature and the like.

The dirty detergent used for washing with a dry cleaner is supplied to the dirt-solvent supply flow path 12, and when the dirt-solvent supply valve 13 is opened, the dirt-solvent is introduce | transduced into the distillation kiln 10. As shown in FIG. The distillation kiln 10 has a heating chamber 11 at a lower portion thereof. When the steam supply valve 15 is opened, hot steam is introduced into the heating chamber 11 through the steam supply pipe 14, and the heating chamber ( 11) It is discharged through the steam discharge pipe 16 past the inside. The lower part of the distillation kiln 10 is heated by the heat of the steam, and the solvent introduced into the distillation kiln 10 and stored in the lower part is heated. A solvent gas flow path 17 is connected to the upper portion of the distillation kiln 10, and the solvent gas flow path 17 is a spiral condensation coil (located in a first condenser (cooler) 18 for cooling and condensing the solvent gas) 19). Therefore, the solvent gas vaporized by the heating in the distillation kiln 10 is introduce | transduced into the condensation coil 19 through the solvent gas flow path 17. As shown in FIG.

Cooling water is continuously supplied to the first condenser 18, and the solvent gas in the condensation coil 19 is cooled and condensed by heat exchange with the cooling water. The liquid solvent is introduced into the ejector 22 through the check valve 20 and the regeneration solvent valve 21. The ejector 22, along with the vacuum pump 23 and the second condenser (cooler) 24, is formed in the middle of the regeneration solvent circulation flow path 26 in which the outlet end and the inlet end are connected to the buffer tank 27. The solvent is pumped in the regeneration solvent circulation channel 26 by the vacuum pump 23 in the direction of the arrow in FIG. 4. In the ejector 22, the solvent is ejected from the nozzle, and by the negative pressure generated at that time, the pressure in the connected distillation kiln 10 may be reduced or the solvent condensed into the first condenser 18 may be sucked. In addition, the solvent circulating in the buffer tank 27 and the regeneration solvent circulation flow path 26 passes through the second condenser 24. A cooling coil 25 through which cooling water passes is disposed inside the second condenser 24. The solvent is cooled by heat exchange with the cooling coil 25. Thereby, while the high temperature solvent which condenses and flows in is cooled, the temperature rise of the solvent by circulation is also suppressed.

As mentioned above, when heating the distillation kiln 10 through steam in the heating chamber 11 formed in the lower part of the distillation kiln 10, the vacuum pump 23 is operated and the suction action of the ejector 22 is carried out. The pressure inside the distillation kiln 10 is reduced. Thereby, even when a solvent is highly flammable, it can prevent ignition at the time of heating, and can ensure high safety.

In the conventional distillation apparatus as described above, relatively large sizes such as the buffer tank 27, the first condenser 18 having the condensation coil 19, the second condenser 24 having the cooling coil 25, and the like are large. Each component having a volume is formed independently. Therefore, the number of parts constituting the device increases, the cost increases, and there is a problem that the size of the entire device is large and the space of the installation place must be secured.

This invention is made | formed in view of such a point, Comprising: The main objective is to provide the distillation apparatus for dry cleaners which can simplify the structure, reduce the number of parts, and can miniaturize.

Means to solve the problem

The present invention made in order to solve the above problems is a distillation apparatus for purifying a solvent soiled by the operation of a dry cleaner,

a) distillation kiln for heating and vaporizing the soiled solvent,

b) a solvent gas from the distillation kiln is introduced, and a condensation line for condensing the solvent gas,

c) a buffer tank for storing the distilled solvent;

d) a passage in which the inlet end and the outlet end are connected together to the buffer tank, wherein the pump is used to circulate the solvent in the flow path and the solvent is liquefied in the condensation line by using the flow of the solvent by the pump to suck the distilled solvent A solvent circulation flow path formed with an ejector on the way,

e) a cooling conduit having a cooling water or refrigerant flowing therein, the cooling conduit and the condensation conduit arranged so as to be immersed in the solvent stored in the buffer tank, and further formed of the solvent in the buffer tank by the pump. The cooling conduit is arranged on the upstream side of the flow, and the condensation conduit is arranged on the downstream side.

To practice the invention  Best form for

 EMBODIMENT OF THE INVENTION Hereinafter, one Example of the distillation apparatus which concerns on this invention is described with reference to FIGS. 1 is a configuration diagram of a main part centered on a piping path of a dry cleaner using the distillation apparatus of this embodiment, FIG. 2 is a configuration diagram centered on a piping path of the distillation apparatus of this embodiment, and FIG. 3 is a distillation apparatus of this embodiment It is a schematic appearance plan view of the.

First, with reference to FIG. 1, a structure is demonstrated centering on the flow of the solvent in the dry cleaner using the distillation apparatus of a present Example. In addition, although the dry cleaner of FIG. 1 has a drying function, the description of the structure is abbreviate | omitted here.

In the outer tub 30, a cylindrical drum 31 having a plurality of fluid holes therein is supported axially so as to be free to rotate, and the outer tub 30 is provided with a liquid supply pipe 32 and a drain pipe 33 of the solvent. Connected. The drainage conduit 33 includes a standard liquid level switch 34a for detecting that the solvent in the drum 31 is at a predetermined liquid level, and a button trap having a drainage liquid level switch 34b for detecting that the solvent in the outer tub 30 has been discharged. It is connected to (34). The button trap 34 is a kind of filter for removing solid matter, such as a button of the clothing mixed in the discharged solvent. The liquid supply port 35a of the solvent tank 35 and the drain port 34c of the button trap 34 for storing the solvent used for washing are joined via the liquid supply valve VL1 and the drain valve VL2, respectively. It is connected to the suction port of the pump 36. The discharge port of this pump 36 passes through the check valve 37 and is connected to either the inlet port or the outlet port of the filter 38 by the first three-way switching valve VL3. The filter 38 consists of a paper filter, an activated carbon filter, etc., and removes impurities, such as a fine dust mixed in a solvent.

The outlet of the filter 38 is also connected to the solvent cooler 39. The solvent cooler 39 has a heat exchanger provided with piping through which the cooling water circulated and supplied from the cooler 45 as necessary, and cools the solvent by heat-exchanging with the solvent by the heat exchanger. The solvent temperature sensor 40 and the soap concentration sensor 41 are formed in the downstream of this solvent cooler 39, and the downstream flow path is supplied to the liquid supply pipe 32 by the second three-way switching valve VL4. Or the solvent tank 35. In addition, a soap reservoir 43 is connected to the suction port of the pump 36 via the soap supply valve VL5. The inlet of the filter 38 is also connected to the solvent inlet of the distillation apparatus 44 via the contaminated solvent supply flow passage 12, and the solvent outlet of the distillation apparatus 44 is connected to the water separator through the purification solvent outflow passage 28. It is connected to the solvent tank 35 through 42. The water separator 42 separates the water mixed in the solvent and returns only the solvent to the solvent tank 35. The water separator 42 recovers by condensing the solvent gas contained in the air discharged in the outer tank 30 during the drying operation. Solvent is also introduced into the water separator 42. In addition, although not shown here, in consideration of the case where the temperature of a solvent is too lower than target temperature (for example, about 25 degreeC), you may use together the solvent cooler 39 with the heater for heating a solvent suitably.

In the flow path of the solvent comprised as mentioned above, when supplying the solvent stored in the solvent tank 35 in the outer tank 30, for example to perform a washing | cleaning operation, the drain valve VL2 is closed, The liquid supply valve VL1 is opened, the outlet of the solvent cooler 39 is connected to the liquid supply pipe 32 side by the second three-way switching valve VL4, and the discharge port side of the pump 36 is connected to the first. The pump 36 is driven by connecting to the inlet port of the filter 38 by the three-way selector valve VL3. Moreover, the pollutant solvent supply valve 13 formed on the pollutant solvent supply flow path 12 of the distillation apparatus 44 mentioned later is closed. Then, the solvent stored in the solvent tank 35 is supplied with the liquid supply valve VL1, the pump 36, the first three-way switching valve VL3, the filter 38, the solvent cooler 39, and the second three-way switching. The valve VL4 is supplied into the outer tub 30 from the liquid supply pipe 32. Then, the solvent is supplied into the outer tank 30 such as the solvent tank 35 until a predetermined amount of solvent is accumulated in the outer tank 30 by the standard liquid level switch 34a.

When it is detected by the standard liquid level switch 34a that the predetermined liquid level is reached, the liquid supply valve VL1 is closed and the drain valve VL2 is opened. As a result, the solvent stored in the outer tub 30 passes through the drainage pipe 33, the drain valve VL2, the pump 36, the first three-way switching valve VL3, the filter 38, and the solvent cooler 39. ), And is circulated in the outer tub 30 after the second three-way switching valve VL4. Therefore, during the washing operation, the solvent is circulated and supplied as described above, the solids from the laundry are collected by the button trap 34, and the solvent is further purified by the filter 38. In addition, during the washing operation, soap is added so as to have an appropriate soap concentration to prevent washing while improving washing performance as described later. The soap pouring operation can be achieved by opening the soap supply valve VL5 with the pump 36 operating.

When the predetermined washing operation is finished and the solvent stored in the outer tank 30 is discharged, the drain valve VL2 is opened, the liquid feed valve VL1 is closed, and the discharge port side of the pump 36 is made first. The contaminant solvent supply valve 13 in the distillation apparatus 44 is opened by connecting to the inlet side of the filter 38 by the direction switching valve VL3 to drive the pump 36. Then, the solvent in the outer tank 30, the drainage pipe 33, the button trap 34, the drainage valve VL2, the pump 36, the first three-way switching valve (VL3), the contaminated solvent supply flow passage 12 After passing through the distillation apparatus 44, the solvent purified by distillation in the distillation apparatus 44 is returned to the solvent tank 35 through the purification solvent outflow passage 28 and the water separator 42 as described later. Goes. In this case, the solvent can be purified by the distillation apparatus 44 in the process of recovering the solvent used for washing | cleaning to the solvent tank 35. FIG.

Thus, the distillation apparatus 44 is used at the time of purifying the solvent which became dirty by the washing | cleaning operation. This invention has the big characteristic in the structure of this distillation apparatus 44. FIG. This point will be described below with reference to FIGS. 2 and 3. In FIG.2, FIG.3, the same code | symbol is attached | subjected to the same or corresponding component in order to make clear the correspondence with the component of the conventional distillation apparatus shown in FIG.

The pollutant solvent supply passage 12 having the pollutant solvent supply valve 13 is connected to the distillation kiln 10, and the lower portion of the distillation kiln 10 is connected to the hot steam supplied through the steam supply pipe 14. The heating chamber 11 heated by this is formed. The solvent gas vaporized in the distillation kiln 10 by heating is introduced into the condensation coil 19 which is the condensation conduit in this invention via the solvent gas flow path 17, but here, it cools the condensation coil 19 with cooling water. There is no cooling first condenser, and the condensation coil 19 is disposed inside the buffer tank 27 in which the solvent is stored. As described later, the solvent condensed in the condensation coil 19 is introduced into the ejector 22 via the regeneration solvent valve 21.

The ejector 22 is inserted together with the vacuum pump 23 in the middle of the regeneration solvent circulation flow path 26 in which the outlet end and the inlet end are connected to the buffer tank 27 as in the prior art, but the second condenser that has existed conventionally exists. I never do that. Instead, the cooling coil 25 which is a cooling conduit in this invention is arrange | positioned so that it may be immersed in the solvent in the buffer tank 27. As shown in FIG. That is, in the distillation apparatus 44 of this embodiment, both the condensation coil 19 and the cooling coil 25 which were conventionally arrange | positioned inside independent capacitor | condenser are arrange | positioned inside the buffer tank 27, respectively. When the vacuum pump 23 is operated, the solvent is pushed into the regeneration solvent circulation passage 26 in the direction indicated by the arrow in FIG. 2, whereby the solvent in which the inside of the distillation kiln 10 is decompressed or condensed with liquid is sucked or It is the same as before.

As shown to Fig.3 (a), inside the buffer tank 27, the condensation coil 19 which the solvent gas flows in from the upper side, and the cooling coil 25 which coolant flows in from the upper side are installed side by side in the horizontal direction. It is. However, between the condensation coil 19 and the cooling coil 25, the 1st boundary wall 271 installed vertically from the upper side and the lower part opened, and the 2nd boundary wall 272 erected vertically from the lower side and the upper part opened are It is formed as a rectifying means in the present invention. In addition, a cylindrical partition 273 is provided inside the condensation coil 19. The inflow end 274 of the regeneration solvent, which is the return port of the solvent exiting the regeneration solvent circulation flow path 26, is a bottom wall surface on the side where the cooling coil 25 is housed and is formed at a position away from the first boundary wall 271. It is. On the other hand, the outflow end 275 of the regeneration solvent, which is the outlet of the solvent to the regeneration solvent circulation flow path 26, is a bottom wall surface on the side where the condensation coil 19 is housed and is located at a position separated from the second boundary wall 272. Formed.

As described above, when the vacuum pump 23 operates, the solvent flows in the regeneration solvent circulation flow path 26 in a predetermined direction, and a flow of the solvent is formed inside the buffer tank 27. That is, as indicated by arrows in FIG. 3A, since the solvent pumped by the vacuum pump 23 is sharply raised from the inflow end 274 of the regeneration solvent, the flow is increased in the buffer tank 27. After ascending to near the liquid surface at, it descends along the first boundary wall 271 and ascends in the area between the first boundary wall 271 and the second boundary wall 272 past the lower opening of the first boundary wall 271. The condensation coil 19 flows through the upper opening of the second boundary wall 272 to the housed side, and descends to reach the outflow end 275 of the regeneration solvent. At this time, since no solvent flows inside the cylindrical partition wall 273, the solvent necessarily passes near the condensation coil 19. That is, the 1st boundary wall 271, the 2nd boundary wall 272, and the cylindrical partition wall 273 are for adjusting the flow direction and position of the solvent in the buffer tank 27. As shown in FIG.

As mentioned above, the solvent returned from the regeneration solvent circulation flow path 26 to the buffer tank 27 is first cooled by performing heat exchange with a cooling coil 25 through which cooling water flows. At this time, since the flow of the solvent returns near the liquid level as described above, the opportunity for heat exchange with the cooling coil 25 increases, and the solvent is efficiently cooled to lower the temperature. In this way, the solvent at which the temperature is lowered flows around the condensation coil 19. Although solvent gas is supplied to the condensation coil 19 from above, since the temperature of the solvent which flows around the condensation coil 19 is low, the solvent gas in the condensation coil 19 is cooled and condensed by heat exchange with this solvent. Liquefy. Thereby, the liquefied solvent flows out from the lower end of the condensation coil 19, and is guide | induced to the ejector 22 as mentioned above.

In general, in the case of performing heat exchange between two fluids in this way, it is preferable that both fluid flow directions are opposite to each other. However, in the distillation apparatus 44 of the present embodiment, the flow of the solvent gas and the solvent in the condensation coil 19 and the flow of the solvent in the condensation coil 19 are generally directed from the top to the bottom in order to accommodate the entire apparatus compactly. Similarly, from the top to the bottom, the same direction. Therefore, although heat exchange efficiency tends to worsen, in order to supplement it, the cylindrical partition 273 is provided inside the condensation coil 19, and the cooled solvent is made to contact the condensation coil 19 efficiently. Thereby, even if the flow direction of the solvent gas and the solvent in the condensation coil 19 and the flow direction of the cooled solvent are the same, the solvent gas can be efficiently cooled to condense and liquefy.

As described above, in the distillation apparatus 44 of the present embodiment, since the first and second condensers, which are conventionally provided, are integrated with the buffer tank 27, the pipe connected to the vacuum pump 23 is greatly simplified. . Thereby, as shown in FIG. 3, the piping part 29 may be concentrated in the space below the buffer tank 27, and the distillation kiln 10 may be arrange | positioned at the back, and space saving is achieved. can do. In addition, since the external piping of the first and second condensers becomes unnecessary, the piping of the solvent is also reduced, so that the number of parts can be reduced and the cost reduction is also achieved.

Moreover, the said Example is an example of this invention, It is clear that even if a deformation | transformation, correction, and addition are made suitably within the meaning of this invention, it is included in a claim of this application.

In the conventional distillation apparatus, although cooling water was used to condense the solvent gas generated in the distillation kiln, in the distillation apparatus according to the present invention, the condensation line into which the solvent gas is introduced is immersed in the solvent in the buffer tank, thereby providing a buffer. The solvent gas is condensed using a solvent having a temperature control or temperature control stored in the tank. The condensed solvent flows through the ejector into the buffer tank from the solvent circulation flow path, but the temperature of the solvent immediately after condensation is high, and the solvent circulating through the solvent circulation flow path also increases in temperature during the circulation. The temperature of the solvent flowing into the buffer tank from the circulation passage is relatively high. Therefore, in order to adjust the temperature of the distilled solvent, the cooling conduit disposed in the buffer tank is provided upstream from the condensation conduit in the flow of the solvent formed in the buffer tank. As a result, the solvent introduced into the buffer tank from the solvent circulation flow path first decreases in temperature by heat exchange with the cooling conduit, and the solvent in the condensation conduit increases by increasing the temperature difference at the time of heat exchange due to the heat exchange between the lowered solvent and the condensation conduit. The gas can be cooled efficiently.

Thus, as a distillation apparatus which concerns on this invention, the condensation line | pipe previously arrange | positioned in the condenser for condensation liquefaction of a solvent gas, and the cooling conduit arrange | positioned in the condenser for cooling (temperature adjustment) of the solvent circulating in a solvent circulation flow path are mentioned. Is installed inside the buffer tank, the three components of a conventional buffer tank, a condenser for condensation of a solvent gas, and a condenser for cooling a solvent are concentrated in only one buffer tank. Thereby, the number of parts which comprise an apparatus can be reduced significantly and cost can be reduced. Moreover, in general, capacitors have a relatively large sheath for sufficient heat exchange, but since they are unnecessary, the size of the device itself can be reduced. Thereby, since the installation space of an apparatus may be small, the freedom degree of an installation place becomes large.

Moreover, in the distillation apparatus which concerns on this invention, although various forms can be considered as arrangement | positioning of a cooling conduit and a condensation conduit in a buffer tank, As a preferable aspect, it returns to the said buffer tank through the said solvent circulation flow path. What is necessary is just to have the structure with the said rectification means which rectifies the flow of a solvent in the buffer tank so that a hepatic solvent passes around the said cooling conduit and passes around a said condensation conduit.

Specifically, for example, the cooling conduit and the condensation conduit are arranged side by side in the buffer tank, and a boundary wall having a communication opening at a predetermined number of positions is provided between the two conduits as the rectifying means. It is good to make a configuration.

According to this structure, since the solvent cooled by the heat exchange with the cooling conduit in the buffer tank flows in the vicinity of the condensation conduit, the efficiency of heat exchange between the solvent and the condensation conduit is improved, and the recovery rate of the distilled solvent is increased. Can be.

In addition, although the shape of a condensation line and a cooling line can consider various things, in order to ensure the contact area with a solvent large, what is necessary is just to make it the spirally rolled pipe line, for example. In this case, however, the solvent passing near the inner shaft of the spirally wound pipe is hardly contributing to heat exchange. Therefore, a cylindrical partition may be provided inside the spirally wound pipe. Thereby, the solvent which is a target of heat exchange flows in the vicinity of the spirally wound pipe line, and can cool the solvent gas efficiently around the condensation pipe line, for example.

Claims (4)

As a distillation apparatus for purifying a solvent soiled by the operation of a dry cleaner, a) distillation kiln for heating and vaporizing the soiled solvent, b) a solvent gas from the distillation kiln is introduced to condensate the solvent gas, and c) a buffer tank for storing the distilled solvent; d) a flow path in which the inlet end and the outlet end are connected together to the buffer tank, whereby a liquid liquefied in the condensation line by using a pump for circulating the solvent in the flow path and the flow of the solvent by the pump sucks out the distilled solvent A solvent circulation flow path formed with an ejector on the way, e) having a cooling conduit in which cooling water or refrigerant flows, and arranging the cooling conduit and the condensation conduit so as to be immersed in the solvent stored in the buffer tank, and further comprising a solvent formed in the buffer tank by the pump. A distillation apparatus for dry cleaners, wherein the cooling conduit is disposed upstream of the flow, and the condensation conduit is disposed downstream. The rectifying means according to claim 1, wherein the solvent flowing back into the buffer tank after passing through the solvent circulation passage passes the periphery of the condensation line after passing around the cooling conduit. Distillation apparatus for a dry cleaner, characterized in that to form a. 3. The boundary wall according to claim 2, wherein the cooling conduit and the condensation conduit are arranged side by side in the buffer tank, and a boundary wall having communication openings in a predetermined number of positions is provided between the two conduits as the rectifying means. Distillation apparatus for dry cleaners to use. The distillation apparatus for dry cleaner according to any one of claims 1 to 3, wherein the condensation line and / or the cooling line are spirally rolled pipes, and cylindrical partitions are provided therein.

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