Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
  • D06F43/00—Dry-cleaning apparatus or methods using volatile solvents
  • D06F43/08—Associated apparatus for handling and recovering the solvents
  • D06F43/081—Reclaiming or recovering the solvent from a mixture of solvent and contaminants, e.g. by distilling
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
  • D06F43/00—Dry-cleaning apparatus or methods using volatile solvents
  • D06F43/08—Associated apparatus for handling and recovering the solvents
  • D06F43/081—Reclaiming or recovering the solvent from a mixture of solvent and contaminants, e.g. by distilling
  • D06F43/083—Condensing arrangements

Definitions

• the present invention relates to a distillation apparatus for purifying various solvents used in a dry cleaner.
• FIG. 4 is a schematic configuration diagram centering on the piping of a conventional general distillation apparatus described in the above-mentioned literature.
• the dirty detergent used for washing in the dry cleaner is supplied to the dirty solvent supply flow path 12, and when the dirty solvent supply valve 13 is opened, the dirty solvent is introduced into the distillation pot 10.
• the still 10 has a heating chamber 11 in the lower part, and when the steam supply valve 15 is opened, hot steam flows into the heating chamber 11 through the steam supply pipe 14, and steam is discharged through the heating chamber 11. It is discharged from the pipe 16.
• the lower portion of the still 10 is heated by the heat of the steam, and the solvent introduced into the lower portion 10 and stored in the lower portion is heated.
• a solvent gas flow path 17 is connected to the upper portion of the distillation still 10, and the solvent gas flow path 17 is disposed in a first condenser (cooler) 18 for cooling the solvent gas and condensing it. It communicates with a helical condensing coil 19. Therefore, the solvent gas evaporated by heating in the distillation pot 10 is introduced into the condensing coil 19 through the solvent gas channel 17.
• Cooling water is continuously supplied to the first condenser 18, and the solvent gas in the condensing coil 19 is cooled by the heat exchange with the cooling water to be condensed.
• the liquid solvent is introduced into the ejector 22 through the check valve 20 and the regeneration solvent valve 21.
• the vacuum pump 23 the solvent is pumped in the direction of the arrow in FIG.
• the solvent is ejected from the nozzle, and the pressure in the distillation kettle 10 is reduced by the negative pressure generated at that time, or the solvent condensed in the first condenser 18 is sucked.
• the solvent circulating through the notch tank 27 and the regenerative solvent circulation flow path 26 is a force that passes through the second capacitor 24.
• a cooling coil 25 through which cooling water passes is disposed inside the second capacitor 24. The solvent is cooled by heat exchange with. As a result, the hot solvent that has flowed into the condensate is cooled, and the temperature rise of the solvent due to circulation is also suppressed.
• Patent Document 1 Japanese Patent Laid-Open No. 7-289788
• components having a relatively large volume such as a notch tank 27, a first capacitor 18 having a condensing coil 19, and a second condenser 24 having a cooling coil 25, etc. are provided independently. For this reason, there are problems that the number of parts constituting the device is large and the cost is high, and that the size of the entire device is large and a large installation space must be secured.
• the present invention has been made in view of these points, and the main object of the present invention is to provide a dry cleaner capable of simplifying its structure to reduce the number of parts and to achieve a small size. It is to provide a distillation apparatus for use.
• the present invention which has been made to solve the above problems, is a distillation apparatus for purifying a solvent contaminated by the operation of a dry cleaner,
• the cooling pipe and the condensation pipe are disposed so as to be immersed in the solvent stored in the buffer tank, and upstream of the flow of the solvent formed in the buffer tank by the pump
• the cooling pipe is arranged on the side and the condensing pipe is arranged on the downstream side.
• cooling water is used to condense the solvent gas generated in the distillation kettle into a condensate, but in the distillation apparatus according to the present invention, the condensing line into which the solvent gas is introduced is blocked.
• the solvent gas is condensed and liquefied using the temperature-controlled or temperature-controlled solvent stored in the buffer tank.
• the solvent condensed in the condensate flows into the buffer tank from the solvent circulation channel via the ejector, but the temperature of the solvent immediately after condensing is high, and the solvent circulated through the solvent circulation channel also circulates. Since the temperature rises during this process, the temperature of the solvent flowing into the buffer tank from the solvent circulation channel is relatively high.
• the cooling pipe disposed in the buffer tank for adjusting the temperature of the distilled solvent is installed upstream of the condensing pipe in the flow of the solvent formed in the buffer tank.
• the temperature of the solvent flowing into the koffa tank from the solvent circulation flow path first decreases due to heat exchange with the cooling pipe, and the heat is exchanged between the lowered temperature solvent and the condensation pipe during heat exchange.
• the temperature difference can be increased to efficiently cool the solvent gas in the condensing pipe.
• a condenser pipe disposed in a condenser for solvent gas condensate and cooling of the solvent circulating in the solvent circulation path ( The cooling line that was placed in the condenser for temperature adjustment) is installed inside the buffer tank, so that the conventional buffer tank, condenser for solvent gas condensate, and solvent cooling co
• the three components of the capacitor will be consolidated into one of the buffer tanks only.
• the number of parts constituting the apparatus can be greatly reduced, and the cost can be reduced.
• a capacitor has a relatively large exterior in order to perform sufficient heat exchange, but the size of the device itself can be reduced by eliminating these. As a result, the installation space of the device can be reduced, and the degree of freedom of installation location is increased.
• the buffer is passed through the solvent circulation path. It is preferable to provide a rectifying means for rectifying the flow of the solvent in the buffer tank so that the solvent returned into the tank passes through the periphery of the condensing pipe after passing through the periphery of the cooling pipe.
• the solvent cooled by heat exchange with the cooling pipe in the buffer tank surely flows around the condensation pipe, so that the efficiency of heat exchange between the solvent and the condensation pipe is improved.
• the recovery rate of the distilled solvent can be increased.
• condensing pipes and cooling pipes may have various shapes, for example, a pipe wound in a spiral shape may be used to ensure a large contact area with the solvent.
• the solvent passing through the vicinity of the shaft inside the spirally wound pipe hardly contributes to heat exchange, so that a cylindrical partition wall is placed inside the spirally wound pipe. It is good to have a configuration with.
• the solvent that is the subject of heat exchange flows in the vicinity of the spirally wound pipeline, and for example, the solvent gas can be efficiently cooled around the condensation pipeline.
• FIG. 1 is a configuration diagram of a main part centering on a piping path of a dry cleaner using a distillation apparatus according to an embodiment of the present invention.
• FIG. 2 is a configuration diagram centering on the piping path of the distillation apparatus of the present embodiment.
• FIG. 3 is a schematic external plan view of the distillation apparatus of the present example.
• FIG. 1 is a block diagram of the main parts centering on the piping path of a dry cleaner using the distillation apparatus of this embodiment
• Fig. 2 is a block diagram centering on the piping path of the distillation apparatus of this embodiment
• Fig. 3 is 1 is a schematic external plan view of a distillation apparatus of an example.
• the dry cleaner in FIG. 1 has a drying function, but the description of the configuration is omitted here.
• a cylindrical drum 31 having a large number of liquid passage holes is rotatably supported in the outer tank 30, and a solvent supply pipe 32 and a drain pipe are provided in the outer tank 30. 33 is connected.
• the drainage pipe 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 drain liquid level switch for detecting that the solvent in the outer tank 30 has been discharged. It is linked to a button trap 34 with 34b.
• the button trap 34 is a kind of filter for removing solid substances such as buttons of clothes mixed in the discharged solvent.
• the liquid supply port 35a of the solvent tank 35 for storing the solvent used for washing and the drain port 34c of the button trap 3 4 are joined via the liquid supply valve VL1 and the liquid discharge valve VL2, respectively. Connected to the inlet.
• the discharge port of the pump 36 is connected to either the inlet or the outlet of the filter 38 via the check valve 37 and the first three-way switching valve VL3.
• the filter 38 is composed of a paper filter, an activated carbon filter, and the like, and removes impurities such as fine dust mixed in the solvent.
• the outlet of the filter 38 is also connected to a solvent cooler 39.
• the solvent cooler 39 has a heat exchanger having a pipe through which cooling water circulated and supplied from the cooler 45 passes as necessary, and cools the solvent by exchanging heat with the solvent in the heat exchanger.
• a solvent temperature sensor 40 and a soap concentration sensor 41 are provided on the downstream side of the solvent cooler 39, and the downstream flow path is provided by either a liquid supply line 32 or a solvent tank 35 by a second three-way switching valve VL4. Connected to or.
• a soap storage tank 43 is connected to the suction port of the pump 36 via a soap supply valve VL5. Further, the inlet of the filter 38 is connected to the dirty solvent supply flow path 12.
• the solvent outlet of the distillation device 44 is also connected to the solvent tank 35 via the water separator 42 via the purified solvent outlet channel 28.
• the water separator 42 separates the water mixed in the solvent and returns only the solvent to the solvent tank 35, and condenses the solvent gas contained in the air discharged from the outer tank 30 during the drying operation.
• the recovered solvent is also introduced into the water separator 42.
• a heater for appropriately heating the solvent is used in combination with the solvent cooler 39. May be.
• 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 line 32 side by the second three-way switching valve VL4, and the discharge port side of the pump 36 is filtered by the first three-way switching valve VL3.
• the dirty solvent supply valve 13 provided on the dirty solvent supply flow path 12 of the distillation apparatus 44 described later is closed.
• the solvent stored in the solvent tank 35 is removed from the liquid supply line 32 via 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 valve VL4. It is supplied into the tank 30. Then, the solvent is supplied from the solvent tank 35 into the outer tank 30 until the standard liquid level switch 34a detects that a predetermined amount of solvent has accumulated in the outer tank 30.
• the liquid supply valve VL1 is closed and the liquid discharge valve VL2 is opened.
• the solvent stored in the outer tank 30 flows into the drainage pipe 33, the drainage valve VL2, the pump 36, the first three-way switching valve VL3, the filter 38, the solvent cooler 39, and the second three-way switching valve VL4. After that, it is circulated in the outer tank 30. Therefore, during the washing operation, the solvent is circulated and supplied as described above, the solid matter discharged from the laundry is collected by the button trap 34, and the solvent is further purified by the filter 38.
• the soap is introduced so as to obtain an appropriate soap concentration in order to improve the cleaning performance and prevent charging as described later.
• the soap charging operation can be achieved by opening the soap supply valve V L5 while the pump 36 is operated.
• the dirty solvent supply flow path 12 provided with the dirty solvent supply valve 13 is connected to the distillation pot 10, and the lower part of the distillation pot 10 is heated by high-temperature steam supplied through the steam supply pipe 14.
• a heating chamber 11 is provided.
• the solvent gas vaporized in the distillation still 10 by heating passes through the solvent gas channel 17 and is introduced into the condensing coil 19 which is the condensing pipe in the present invention.
• the first condenser that cools the condensing coil 19 with cooling water. Is not present, and the condensing coil 19 is disposed inside a notch tank 27 in which a solvent is stored.
• the solvent condensed and liquefied in the condensing coil 19 is introduced into the ejector 22 through the regenerated solvent valve 21.
• the ejector 22 is a force that is inserted together with the vacuum pump 23 in the middle of the regeneration solvent circulation passage 26 in which the outlet end and the inlet end are connected to the notch tank 27, as in the conventional case.
• a cooling coil 25, which is a cooling pipe in the present invention, is disposed so as to be immersed in the solvent in the notch tank 27. That is, in the distillation apparatus 44 of the present embodiment, both the condensing coil 19 and the cooling coil 25 that are conventionally disposed in the independent condensers are both disposed in the buffer tank 27.
• a condensing coil 19 into which solvent gas flows from above and a cooling coil 25 into which cooling water also flows from above are installed side by side in the notch tank 27.
• a first partition wall 271 that is suspended from above and opened at the bottom, and a second partition wall 272 that is also erected downward and opened at the top. It is provided as a rectifying means in the present invention.
• a cylindrical partition wall 273 is installed on the inner side of the condensing coil 19.
• the regeneration solvent inflow end 274, which is a return port of the solvent from the regeneration solvent circulation channel 26, is provided on the bottom wall surface on the side where the cooling coil 25 is accommodated and at a position away from the first partition wall 271. It has been.
• the recycled solvent outflow end 275, which is a solvent delivery port to the recycled solvent circulation channel 26, is the bottom wall surface on the side where the condensing coil 19 is accommodated and is located away from the second partition wall 272. Is provided.
• the solvent flows in a predetermined direction in the regenerated solvent circulation flow path 26, and a solvent flow is also formed in the buffer tank 27. That is, as indicated by an arrow in FIG. 3 (a), the solvent pumped by the vacuum pump 23 rises vigorously from the regeneration solvent inflow end 274. After rising to the vicinity, it descends along the first partition wall 271 and rises through the lower opening of the first partition wall 271 and the region sandwiched between the first partition wall 271 and the second partition wall 272. Then, it flows through the upper opening of the second partition wall 272 to the side where the condensing coil 19 is accommodated, and descends to the outflow end 275 of the regenerated solvent.
• the solvent returned to the buffer tank 27 from the regenerative solvent circulation flow path 26 is first cooled by exchanging heat with the cooling coil 25 through which the cooling water flows. At this time, the flow of the solvent turns back near the liquid surface as described above, so that the chance of heat exchange with the cooling coil 25 increases, and the solvent is efficiently cooled and the temperature is lowered. Thus, the solvent whose temperature has decreased flows around the condensing coil 19. Solvent gas is supplied to the condensing coil 19 from the upper side. However, since the temperature of the solvent flowing around the condensing coil 19 is low, the solvent gas in the condensing coil 19 is cooled by the heat exchange with the solvent to be condensed. As a result, the liquefied solvent flows out from the lower end of the condensing coil 19 and is led to the ejector 22 as described above.
• the efficiency of heat exchange is better when the flow directions of both fluids are opposite to each other.
• the flow of the solvent gas and the solvent in the condensing coil 19 is directed from the top to the bottom as a whole because of the piping for accommodating the entire apparatus in a compact manner.
• the flow of the cooled solvent is directed in the same direction from the top to the bottom. Therefore, although the efficiency of heat exchange tends to deteriorate, by installing the cylindrical partition wall 273 inside the condensing coil 19 to compensate for this, the cooled solvent can efficiently contact the condensing coil 19. ing.
• the solvent gas can be efficiently cooled to be condensed and liquefied.
• the first and second capacitors conventionally provided as described above are integrated with the buffer tank 27, so that the piping connected to the vacuum pump 23 is provided. Very simplified. As a result, as shown in FIG. 3, it is possible to consolidate the piping part 29 in the space below the notch tank 27 and arrange the distillation kettle 10 in the rear part, thereby achieving space saving. Can do. In addition, since the outer packaging of the first and second capacitors is not required and the number of solvent pipes is reduced, the number of parts can be reduced and the cost can be reduced.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
• Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=36406954

Family Applications (1)

Country Status (5)

Cited By (3)

Families Citing this family (9)

Citations (3)

• 2004
  • 2004-11-17 JP JP2004333233A patent/JP2006141546A/ja not_active Withdrawn
• 2005
  • 2005-10-12 WO PCT/JP2005/018761 patent/WO2006054408A1/ja active Application Filing
  • 2005-11-01 KR KR1020050103631A patent/KR100724322B1/ko not_active IP Right Cessation
  • 2005-11-08 CN CNB2005101156874A patent/CN100507135C/zh not_active Expired - Fee Related
  • 2005-11-11 TW TW094139545A patent/TWI356110B/zh not_active IP Right Cessation

Patent Citations (3)

Also Published As

Similar Documents

Legal Events