JP2011218352A - Gas-liquid separating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas-liquid separating device capable of eliminating a trouble on the device caused by highly viscous unnecessary matters by a combination of temperature and pressure adjustments as such that keeps carbon dioxide in a supercritical or liquid state at a time following a cleaning apparatus or the like at a prescribed gas-liquid ratio, and also capable of continuously separating unnecessary matters without needing depressurization from carbon dioxide discharged from the apparatus even in a preceding process having general cleaning tank power and aiming at high-quality cleaning by separating a cleaning tank and a separating tank.SOLUTION: The gas-liquid separating device is composed of: a temperature adjuster and a pressure adjuster which serve to keep the discharged fluid discharged from the cleaning apparatus or a drying apparatus employing carbon dioxide in a supercritical or liquid state at a prescribed gas-liquid ratio; a gas-liquid separating pressure vessel for separating the discharged fluid undergoing the pressure adjustment by the temperature and pressure adjusters into gas and liquid; and a temperature controller capable of controlling a liquid level of the liquid carbon dioxide or that between the liquid carbon dioxide and the separated unnecessary matters in the gas-liquid separating pressure vessel.

Description

  The present invention continuously gasses carbon dioxide by concentrating the discharged fluid in which unnecessary substances discharged in a cleaning device, a drying device, an extraction device, processing of a polymer material, etc. using supercritical or liquid carbon dioxide are dissolved. The present invention relates to a gas-liquid separator that recovers carbon.

  The conventional gas-liquid separation device is intended to completely vaporize liquid carbon dioxide in the separation tank to separate and remove unnecessary substances, by providing cooling means at the top of the tank and heating means at the bottom, It causes convection of the fluid, forms a flow path through which the fluid circulates, cleans the object to be cleaned, lowers the solubility by using the density difference, and separates unnecessary matter at the lower part in the cleaning tank A thermal circulation separation device in which a washing tank and a separation tank to be recovered are integrated has been proposed.

The method of completely evaporating liquid carbon dioxide in the separation tank to separate and remove unnecessary substances is disadvantageous in that, when a highly viscous substance is to be separated, problems such as clogging of equipment components and causing malfunctions occur. was there.

  The thermal circulation separation device in which the washing tank and the separation tank are integrated is considered to have an appropriate application with a compact design, but on the other hand, it takes time to pressurize and depressurize the apparatus because of the integrated structure. There are drawbacks, and because of the internal circulation, there is a disadvantage that it is not suitable for high-level washing of the object to be cleaned.

JP 2003-117504 A

  In view of the conventional drawbacks as described above, the present invention eliminates unnecessary substances with high viscosity by combining supercritical or liquid carbon dioxide after the cleaning apparatus with temperature adjustment and pressure adjustment to maintain a predetermined gas-liquid ratio. The separation tank is separated from the washing tank, eliminating the need for pressure reduction when taking out the object to be cleaned, and for the purpose of advanced washing of the general washing tank power of the previous process. It is an object of the present invention to provide a gas-liquid separation device capable of continuously separating unnecessary substances from the discharged carbon dioxide.

The above and other objects and novel features of the present invention will become more fully apparent when the following description is read in conjunction with the accompanying drawings.
However, the drawings are for explanation only and do not limit the technical scope of the present invention.

  In order to achieve the above object, the present invention provides a temperature adjusting means and a pressure adjusting means for maintaining a predetermined gas-liquid ratio of a discharged fluid discharged from a cleaning apparatus or a drying apparatus using supercritical or liquid carbon dioxide. A gas-liquid separation pressure vessel that separates the discharged fluid pressure-adjusted by the temperature adjustment means and the pressure adjustment means into gas and liquid, and carbon dioxide that is the liquid of this gas-liquid separation pressure vessel or carbon dioxide that is the liquid The gas-liquid separator is constituted by temperature adjusting means capable of controlling the liquid level with the unnecessary material.

  The present invention relates to a temperature adjusting means and a pressure adjusting means for maintaining a predetermined gas-liquid ratio of a discharged fluid discharged from a cleaning apparatus or a drying apparatus using supercritical or liquid carbon dioxide, and the temperature adjusting means and the pressure adjustment. A gas-liquid separation pressure vessel for separating the discharged fluid whose pressure is adjusted by the means into a gas and a liquid, and an unnecessary object collecting container provided with a liquid feeding means communicating with the upper and lower portions where the liquid of the gas-liquid separation pressure vessel is located; The gas-liquid separation device is constituted by a second impurity discharge pipe provided with an on-off valve for discharging unnecessary substances in the liquid to the outside from the upper part or the lower part of the unnecessary substance collecting container.

As is clear from the above description, the present invention has the following effects.
(1) Temperature adjusting means and pressure adjusting means for maintaining a predetermined gas-liquid ratio of the exhaust fluid discharged from the cleaning device or drying device using supercritical or liquid carbon dioxide, and the temperature adjusting means and pressure adjustment Gas-liquid separation pressure vessel that separates the discharged fluid pressure-adjusted by means into gas and liquid, and the liquid level of carbon dioxide that is the liquid of this gas-liquid separation pressure vessel or carbon dioxide that is the liquid and unwanted substances separated By means of a combination of cooling and pressure adjustment so as to maintain a predetermined gas-liquid ratio of supercritical or liquid carbon dioxide after the cleaning device or drying device. Eliminates problems with equipment caused by highly viscous waste, and separates the cleaning tank and separation tank, so there is no need for decompression, and a general cleaning tank in the previous process Undesired substances from carbon dioxide that discharged to a device intended can be separated continuously advanced cleaning.
(2) According to (1), the position of the liquid level in the gas-liquid separation pressure vessel can be easily and accurately controlled by the temperature of the heater.
(3) Claim 2 circulates the liquid containing the unnecessary material stored in the gas-liquid separation pressure vessel from the gas-liquid separation pressure vessel into the unnecessary material collection vessel by the liquid feeding device, and the unnecessary material collection vessel Unnecessary items can be discharged from the second through the second unnecessary discharge pipe.
Therefore, it can be reliably discharged to the outside regardless of whether the density of unnecessary materials is larger or smaller than the density of carbon dioxide, which is a liquid.

Schematic of the best first use state for carrying out the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram of the best first embodiment for carrying out the present invention. Schematic of the 2nd use condition for implementing this invention. Schematic of the 3rd use condition for implementing this invention. Schematic of the 4th use condition for implementing this invention.

  Hereinafter, the present invention will be described in detail based on embodiments for carrying out the present invention shown in the drawings.

  In the first embodiment for carrying out the present invention shown in FIG. 1 and FIG. 2, reference numeral 1 represents the present invention for recovering and regenerating a discharged fluid 3 discharged from a cleaning device 2 using supercritical or liquid carbon dioxide. The carbon dioxide regeneration and recovery device 1 uses the gas-liquid separation device 8, and the carbon dioxide regeneration and recovery device 1 has a recovery path in accordance with the discharged fluid connected to the discharge outlet pipe 6 of the cleaning device 2. The opening / closing valve 14 can be selected, and includes a temperature adjusting means 15 capable of controlling the temperature and pressure so that the pressure drop of the discharged fluid maintains a predetermined gas-liquid ratio, and a pressure adjusting means 16 for reducing the pressure. Gas-liquid separation devices 8 and 8 comprising pressure drop mechanisms 7 and 7, gas-liquid separation pressure vessels 18 and 18 for separating the discharged fluid 3 whose pressure is adjusted by the pressure drop mechanisms 7 and 7 into gas and liquid, and Gas and liquid Unnecessary substances in the liquid separated by the apparatuses 8 and 8 are recovered under reduced pressure or removed to remove unnecessary substances and burn or discharge to the atmosphere. The mist removing mechanisms 10 and 10 for separating the mist in the carbon dioxide which is the gas separated in the step 1, and the unnecessary matter for removing the unnecessary matter in the carbon dioxide which is the gas separated from the mist by the mist removing mechanisms 10 and 10. A removal mechanism 11 and a liquefaction purification mechanism 12 for liquefying and purifying carbon dioxide, which is a gas from which unnecessary substances have been removed by the unnecessary material removal mechanism 11, are configured.

  As shown in FIG. 2, the two gas-liquid separation devices 8 and 8 have one end connected to the gas-liquid separation pressure vessels 18 and 18 and the discharge pipe 6 and the other ends connected to the filters 17 and 17. Pipe passages 13 and 13 connected to the gas-liquid separation pressure vessel 18 via the pipe passages 13 and 13, on-off valves 14 and 14, temperature adjustment means 15 and 15, and pressure adjustment means 16, respectively. 16, heaters 19 and 19 for adjusting the liquid level of the discharged fluids 3 </ b> A and 3 </ b> A that are stored in the gas-liquid separation pressure vessels 18 and 18, and the gas-liquid separation pressure vessels 18 and 18. Of the discharge passages 20A and 20A in which the on-off valves 20 and 20 communicated with the lower portion of the gas and the gas-liquid separation pressure vessels 18 and 18 are communicated with the upper and lower portions where the liquid is located. Container 39, 39 and pump From the upper part or the lower part of the unnecessary material collection containers 39, 39 of the liquid delivery apparatus 41, 41, or the upper part in the embodiment of the present invention. It is composed of second unnecessary material discharge passages 43 and 43 having on-off valves 42 and 42 for discharging unnecessary materials to the outside.

  The unwanted matter processing mechanisms 9 and 9 can accumulate unwanted matter in the lower part connected to the discharge passages 20A and 20A of the gas-liquid separation pressure vessels 18 and 18 and the second unwanted matter discharge passages 43 and 43. The decompression mechanisms 21 and 21 and the filters 23 and 23 interposed in the exhaust pipes 22 and 22 discharged from the decompression mechanisms 21 and 21 to the atmosphere.

  The two mist removing mechanisms 10, 10 have pipe passages 13, 13 having upper ends and one ends connected to the gas-liquid separation pressure vessels 18, 18, and other ends connected to the unwanted matter removing mechanism 11, The pipes 13 and 13 are composed of cooling devices 24 and 24, filters 25 and 25, and on-off valves 26 and 26.

  The liquid captured by the filters 25 and 25 is configured to be introduced into the gas-liquid separation pressure vessels 18 and 18 through the recovery pipe passages 27 and 27.

  The unneeded matter removing mechanism 11 is a filter that fixes an unwanted substance to an adsorbent interposed in a pipe passage 13 having one end connected to the pipe passages 13 and 13 and the other end connected to the liquefaction purification mechanism 12. 28 and a filter 29.

  The liquefying and purifying mechanism 12 is provided between a pipe passage 13 having pressure regulating valves 30 and 31 connected to the pipe passage 13 of the unwanted matter removing mechanism 11 and between the pressure regulating valves 30 and 31 of the pipe passage 13. A cooling device 32 mounted therein, a gas-liquid separation pressure vessel 33 for purification connected to the cooling device 32, a pressure regulating valve 34 attached to the upper portion of the gas-liquid separation pressure vessel 33 for purification, and the purification device The liquefied and purified carbon dioxide, which includes a heater 35 for adjusting the liquid level of the gas-liquid separation pressure vessel 33 and an open / close valve 36 connected to the lower portion of the gas-liquid separation pressure vessel 33 for purification, is recycled. It is comprised with the discharge pipe 38 which leads to the pressure vessel 37 so that it can be used.

  In the carbon dioxide regeneration and recovery apparatus 1 used in the cleaning apparatus having the above-described configuration, the exhausted fluid 3 at the time of cleaning in the cleaning apparatus 2 is one gas-liquid separator 8, one unwanted matter processing mechanism 9, and one mist. The carbon dioxide is regenerated into liquid carbon dioxide that can be reused by the removal mechanism 10, the unnecessary material removal mechanism 11, and the liquefaction purification mechanism 12.

  Further, the discharged fluid discharged in the second step of the cleaning device 2 is the other gas-liquid separation device 8, the other unwanted matter processing mechanism 9, the other mist removing mechanism 10, the unwanted matter removing mechanism 11 and the liquefaction. Regenerate to liquid carbon dioxide that can be reused in the purification mechanism 12.

  It should be noted that the liquid level of the liquid containing unnecessary substances in the gas-liquid separation pressure vessels 18 and 18 of the gas-liquid separation devices 8 and 8 is adjusted by the heaters 19 and 19 to be at an arbitrary position, and the gas-liquid separation is performed. The liquid feeding means 40, 40 such as the pumps of the liquid feeding devices 41, 41 are driven so that unnecessary objects are not fixedly attached to the inner walls of the pressure vessels 18, 18, and the gas-liquid separation pressure vessels 18, 18 and unnecessary. A liquid containing unnecessary substances is circulated in the object collection containers 39, 39, and discharged to the liquid processing mechanisms 9, 9 from the discharge passages 20A, 20A or the second unnecessary substance discharge paths 43, 43 for processing.

  In the embodiment for carrying out the present invention, the description has been given of the recovery and regeneration of the exhaust fluid 3 discharged from the cleaning device 2 using supercritical or liquid carbon dioxide. However, the present invention is not limited to this. Alternatively, similar effects can be obtained by using a drying apparatus, an extraction apparatus, or a process for recovering and regenerating carbon dioxide used in processing of a polymer material using supercritical or liquid carbon dioxide.

[Different forms for carrying out the invention]
Next, different modes for carrying out the present invention shown in FIGS. 3 to 5 will be described. In the description of the different embodiments for carrying out the present invention, the same components as those in the first embodiment for carrying out the present invention are denoted by the same reference numerals, and redundant description is omitted.

  The second embodiment for carrying out the present invention shown in FIG. 3 is mainly different from the first embodiment for carrying out the present invention in that it is unnecessary from the lower part of the unnecessary matter collecting containers 39, 39 to the outside. The gas-liquid separators 8A and 8A configured in this way are different in that the gas-liquid separators 8A and 8A using the third unnecessary material discharge passages 45 and 45 including the on-off valves 44 and 44 for discharging the objects are used. It is used when the waste fluid used in the cleaning device 2 contains an unnecessary material having a small specific gravity.

  In the third embodiment for carrying out the present invention shown in FIG. 4, the main difference from the first embodiment for carrying out the present invention is that the external parts are disposed from the upper and lower portions of the unnecessary matter collecting containers 39, 39. In terms of using gas-liquid separation devices 8B, 8B using second and third unnecessary material discharge passages 43, 43, 45, 45 provided with on-off valves 42, 42, 44, 44 for discharging unnecessary materials, The gas-liquid separators 8B and 8B configured in this manner discharge unnecessary materials having a small specific gravity of the exhaust fluid used in the cleaning device 2 to the outside through the second unnecessary material discharge passages 43 and 43, and unnecessary materials having a large specific gravity. Are discharged to the outside through the third unnecessary material discharge passages 45, 45.

  The fourth embodiment for carrying out the present invention shown in FIG. 5 is mainly different from the third embodiment for carrying out the present invention in that the gas-liquid separators 8C and 8C are not provided with a discharge passage and a heater. In this regard, the gas-liquid separators 8C and 8C configured as described above may be used.

  The heater 19 used in the first, second, and third embodiments for carrying out the present invention has been described as being installed outside the gas-liquid separation pressure vessel 18, but the present invention is not limited to this. Even if a heater is installed in the gas-liquid separation pressure vessel 18, the same effect can be obtained.

  Further, the discharged fluid at the time of cleaning in the cleaning device 2 is converted into liquid carbon dioxide that can be reused in the gas-liquid separation device 8, the unnecessary material processing mechanism 9, the mist removal mechanism 10, the unnecessary material removal mechanism 11, and the liquefaction purification mechanism 12. You may use for the reproduction | regeneration collection | recovery apparatus to reproduce | regenerate.

  INDUSTRIAL APPLICABILITY The present invention is an industry for manufacturing a gas-liquid separation device for separating a discharged fluid discharged from a cleaning device, a drying device, an extraction device, processing of a polymer material, etc. using supercritical or liquid carbon dioxide into a gas-liquid and the like. Used in industries that use

1: carbon dioxide regeneration and recovery device, 2: cleaning device,
3, 3A: drainage, 4: washing tank,
5: Valve switch, 6: Discharge pipe,
7: Pressure drop mechanism,
8, 8A, 8B, 8C: gas-liquid separator,
9: Unnecessary material processing mechanism, 10: Mist removal mechanism,
11: Unnecessary substance removal mechanism, 12: Liquefaction purification mechanism,
13: Pipe passage, 14: Open / close valve,
15: temperature adjusting means, 16: pressure adjusting means,
17: Filter, 18: Gas-liquid separation pressure vessel,
19: heater, 20: on-off valve,
20A: discharge passage, 21: decompression mechanism,
22: exhaust pipe, 23: filter,
24: Cooling device, 25: Filter,
26: On-off valve, 27: Recovery pipe passage,
28: Filter, 29: Filter,
30: Pressure regulating valve, 31: Pressure regulating valve,
32: Cooling device, 33: Gas-liquid separation pressure vessel for purification,
34: Pressure regulating valve, 35: Heater,
36: open / close valve, 37: pressure vessel,
38: discharge pipe, 39: waste collection container,
40: Liquid feeding means such as a pump, 41: Liquid feeding device,
42: On-off valve, 43: Second unnecessary material discharge passage,
44: On-off valve, 45: Third unnecessary material discharge passage.

Claims (2)

Temperature adjusting means and pressure adjusting means for maintaining a predetermined gas-liquid ratio of the discharged fluid discharged from the cleaning device or drying device using supercritical or liquid carbon dioxide, and the pressure by the temperature adjusting means and the pressure adjusting means. Controls the liquid level of the gas-liquid separation pressure vessel that separates the adjusted exhaust fluid into gas and liquid, and the carbon dioxide that is the liquid of this gas-liquid separation pressure vessel or the carbon dioxide that is the liquid and the separated unwanted matter A gas-liquid separation device comprising temperature control means capable of performing Temperature adjusting means and pressure adjusting means for maintaining a predetermined gas-liquid ratio of the discharged fluid discharged from the cleaning device or drying device using supercritical or liquid carbon dioxide, and the pressure by the temperature adjusting means and the pressure adjusting means. A gas-liquid separation pressure vessel that separates the adjusted exhaust fluid into gas and liquid, and an unnecessary collection container that includes liquid feeding means communicating with the upper and lower portions where the liquid of the gas-liquid separation pressure vessel is located, and this unnecessary A gas-liquid separator comprising a second impurity discharge pipe having an on-off valve for discharging unnecessary substances in the liquid to the outside from the upper part or the lower part of the object collection container.

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