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EP2946112B1 - Agencement de pompes et procédé d'évacuation d'une chambre remplie de vapeur - Google Patents

Agencement de pompes et procédé d'évacuation d'une chambre remplie de vapeur Download PDF

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Publication number
EP2946112B1
EP2946112B1 EP14701014.4A EP14701014A EP2946112B1 EP 2946112 B1 EP2946112 B1 EP 2946112B1 EP 14701014 A EP14701014 A EP 14701014A EP 2946112 B1 EP2946112 B1 EP 2946112B1
Authority
EP
European Patent Office
Prior art keywords
liquid
vacuum pump
chamber
pressure
assembly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP14701014.4A
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German (de)
English (en)
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EP2946112A1 (fr
Inventor
Heiner KÖSTERS
Matthias Tamm
Daniel SCHÜTZE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sterling Industry Consult GmbH
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Sterling Industry Consult GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
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Priority to EP14701014.4A priority Critical patent/EP2946112B1/fr
Publication of EP2946112A1 publication Critical patent/EP2946112A1/fr
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Publication of EP2946112B1 publication Critical patent/EP2946112B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C19/00—Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids
    • F04C19/004—Details concerning the operating liquid, e.g. nature, separation, cooling, cleaning, control of the supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
    • F04C25/02—Adaptations of pumps for special use of pumps for elastic fluids for producing high vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/04—Heating; Cooling; Heat insulation
    • F04C29/042—Heating; Cooling; Heat insulation by injecting a fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C19/00—Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids
    • F04C19/001—General arrangements, plants, flowsheets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2210/00—Fluid
    • F04C2210/10—Fluid working
    • F04C2210/1077—Steam
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2220/00—Application
    • F04C2220/10—Vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F04C28/10—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by changing the positions of the inlet or outlet openings with respect to the working chamber

Definitions

  • the invention relates to an arrangement of a vacuum pump and a chamber in which a suction tract extends between the chamber and the vacuum pump.
  • the vacuum pump is a liquid ring machine.
  • the invention also relates to a method for evacuating a vapor-filled chamber.
  • a vapor-filled chamber is evacuated
  • autoclaves such as those used in hospitals to sterilize, for example, towels, bedding or even instruments.
  • hot steam is introduced into the chamber of the autoclave.
  • the vapor is sucked out of the chamber of the autoclave, so that the sterilized objects can be removed.
  • the steam as such can not simply be released to the environment. In the process, the steam is condensed so that only the condensate remains.
  • a vacuum pump is used, which is connected via a suction tract to the chamber of the autoclave.
  • the suction tract is equipped with a heat exchanger with which so much heat is extracted from the steam, that he condenses. The condensate is sucked in with the vacuum pump and released at atmospheric pressure.
  • heat exchangers are common, in which the vapor to be condensed is passed by cooled plates.
  • Such heat exchangers have the disadvantage that large amounts of water are required to achieve a low condensation temperature.
  • the invention is based on the object to provide an arrangement and a method by which the sucked from the chamber vapor can be condensed in a more environmentally friendly manner. Based on the cited prior art, the object is achieved with the features of the independent claims. Advantageous embodiments can be found in the subclaims.
  • a liquid mouth is arranged in the suction tract to displace gas aspirated from the chamber with liquid.
  • the invention has recognized that by directly introducing liquid into the suction tract, the vapor can be condensed very effectively. Comparative experiments in which once a conventional heat exchanger was cooled with water and once according to the invention directly fed water to the gas, have shown that the water consumption could be reduced by about 50%.
  • Vacuum pumps are designed to draw gas from a chamber to create a vacuum in the chamber.
  • the medium to be delivered is in normal use of a vacuum pump so gaseous.
  • vacuum pumps are sensitive if they suck liquid rather than a pure gaseous medium.
  • the inventive proposal to increase the amount of liquid in the gas stream by adding liquid in the intake targeted, is so far unexpected.
  • the invention has recognized, however, that it is possible with a liquid ring vacuum pump to transport the required amount of liquid resulting from the condensate and the additionally introduced liquid.
  • the suitability of the vacuum pump for conveying liquid can be improved by the inlet opening and / or the outlet opening of the vacuum pump have an enlarged cross section compared with a vacuum pump, which is optimized for pure gas production.
  • the suction power is substantially maintained, so that the vacuum pump is further able to generate and maintain the desired low pressure in the chamber.
  • a low pressure in the chamber is particularly desirable so that the articles in the chamber can be dried within a short time following sterilization. At low pressure the moisture evaporates and can then be sucked off with the vacuum pump. Drying is faster the lower the pressure in the chamber.
  • the vacuum pump may be configured to generate in the chamber a vacuum of less than 150 mbar, preferably less than 100 mbar, more preferably less than 70 mbar. An evacuation to less than 30 mbar is usually not required.
  • the liquid mouth may be disposed in a conduit extending between the chamber and the vacuum pump. It is also possible that the liquid mouth is integrated into the vacuum pump.
  • the liquid mouth can open in the suction region of the vacuum pump, that is, for example, in the suction nozzle or in the suction chamber arranged in front of the working chamber.
  • the liquid is preferably supplied before the gas flow enters the working chamber of the vacuum pump.
  • the suction tract comprises the area between the pump and the chamber in which there is a negative pressure when the vacuum pump is in operation.
  • the amount of liquid resulting from the condensate and the liquid supplied to the suction tract is conveyed through the vacuum pump and exits again on the output side of the vacuum pump. It is not excluded that in the vacuum pump, the mitge designedte liquid and the operating fluid, which forms the liquid ring, and then mix a different amount of liquid from the vacuum pump exits than with the gas flow, the vacuum pump has occurred.
  • a separator At the output of the vacuum pump, a separator can be connected, are collected in the pumped with the vacuum pump liquid quantities.
  • the separator can with a Overflow be provided, is discharged through the excess liquid. Amounts of gas left over after the liquid has been separated can be released to the environment.
  • a return line may be provided, which extends from the output side of the vacuum pump to the liquid mouth. It is then not necessary to use each fresh liquid for condensing the steam, but it can be used liquid that has already passed through the vacuum pump once.
  • the separator is considered as belonging to the output side. The return line can therefore connect to the separator.
  • the vacuum pump may further include an inlet for supplying operating fluid.
  • the operating fluid forms the liquid ring during operation of the vacuum pump.
  • the inlet for the operating fluid is connected to the return line, so that the operating fluid can be performed in a closed circuit.
  • the arrangement can therefore include a fresh water connection, so that the suction tract and / or the working space of the vacuum pump cooler if necessary, for example, room temperature can be supplied. In turn, the warmer fluid can over the separator are discharged, so that the temperature of the liquid in the system drops overall.
  • the fresh water connection can also be used to lower the temperature of the liquid in the system when the pressure on the input side of the vacuum pump is low. For example, if the operating fluid has a temperature of 60 ° C, there is a risk of cavitation at pressures below about 100 mbar. If, however, the temperature of the operating fluid at 20 ° C, pressures of, for example, 50 mbar without cavitation are possible.
  • the fresh water connection can be connected to the return line. Between the fresh water connection and the output side of the vacuum pump, a check valve may be arranged in the return line. Liquid flowing out of the fresh water connection is then supplied to the liquid mouth and / or the operating liquid inlet without prior mixing with the used liquid. If, on the other hand, no liquid comes out of the fresh water connection, the check valve opens and the liquid can flow unhindered from the outlet side of the vacuum pump via the return line to the liquid mouth and / or the inlet for the operating liquid.
  • the fresh water connection is provided with a switching valve with which the inflow of liquid from the fresh water connection can be adjusted. It can be provided a control, under whose control the switching valve is.
  • the controller can be equipped with a temperature sensor for the temperature be connected to the liquid in the system.
  • the controller may be configured to open the switching valve when the temperature exceeds a predetermined threshold.
  • the threshold value can be, for example, 60 ° C., because only liquid with a temperature below this threshold value can easily be discharged via the wastewater.
  • the temperature sensor may be located anywhere in the system.
  • the temperature can thus be measured, for example, within the vacuum pump, in the return line, in the separator or in another part of the liquid circuit.
  • this has the advantage of measuring essentially directly the temperature of the liquid which is discharged as waste water.
  • the controller may also be connected to a pressure sensor for pressure in the intake tract and be arranged to open the switching valve when the pressure falls below a predetermined threshold.
  • the threshold value can be between 80 mbar and 200 mbar, preferably between 100 mbar and 150 mbar.
  • the controller may be further configured to close the switching valve again when a predetermined amount of liquid was supplied from the fresh water connection.
  • the amount of fluid may be such that the fluid in the system is substantially completely replaced with fresh fluid.
  • the predetermined amount of liquid may for example be between 5 l and 15 l.
  • the controller may be configured to open the switching valve at a time when the vacuum pump is not operating.
  • the trigger for this for example, be a control signal, which receives the control. It can be of interest, for example, to supply liquid to the suction tract, although the vacuum pump is not in operation, if the pressure in the chamber is higher than atmospheric pressure and the vapor therefore flows by itself in the direction of the vacuum pump.
  • the chamber of the arrangement according to the invention may be the chamber of an autoclave.
  • the chamber can have a closable opening through which objects to be sterilized can be introduced into the chamber.
  • the chamber When closed, the chamber is closed so that it can be pressurized.
  • the pressure in the chamber may for example be between 2 bar and 4 bar. All pressure data refer to the absolute pressure.
  • the operating fluid and the liquid supplied through the fluid orifice are usually water.
  • the water from the fresh water connection may be at room temperature and thus cooler than the water in the system when the vacuum pump is operating. Is the fluid in the system a liquid other than water, the fresh water connection can also be designed to supply the corresponding liquid.
  • the invention also relates to a method for evacuating a vapor-filled chamber.
  • a vacuum pump which is connected via a suction with the chamber, operated to suck the vapor from the chamber.
  • a liquid is supplied to the gas stream, so that the vapor condenses.
  • the liquid can be returned from the outlet of the vacuum pump to the suction tract.
  • the liquid is returned when the pressure in the suction tract is above a predetermined threshold and when the temperature of the liquid at the outlet of the vacuum pump is below a predetermined threshold.
  • Fresh water can be supplied to the suction tract when the pressure in the suction tract drops below the predetermined threshold value.
  • Fresh water can also be supplied to the suction tract if the temperature of the liquid at the outlet of the vacuum pump exceeds the predetermined threshold value.
  • An inventive arrangement in Fig. 1 includes an autoclave 14, such as is used in hospitals, for example, to sterilize clothing, towels, bedding or instruments.
  • the autoclave 14 comprises a chamber 15 which can be closed so that it is sealed.
  • the chamber 15 can therefore be set under pressure or vacuum.
  • a sterilization cycle will be explained below using the example of towels.
  • the pressure P in the chamber 15 is plotted against time T.
  • the initial state 1 is in the chamber 15 of the atmospheric pressure of about 1 bar.
  • An in Fig. 1 not shown flap is opened and the towels are inserted into the chamber 15.
  • the chamber is evacuated to a pressure of about 100 mbar to 120 mbar.
  • the germ-containing air is sucked out of the chamber 15.
  • a burst of steam with which the chamber 15 is completely filled with steam between the times t1 and t2.
  • the pressure in the chamber 15 rises slightly above atmospheric pressure.
  • the chamber 15 is evacuated again to 100 mbar to 120 mbar.
  • two more bursts of steam with subsequent evacuation.
  • the series of bursts of steam serves to reliably and completely rid the chamber 15 of the remnants of the original germ-containing air.
  • the chamber 15 is filled once more with steam, this time creating a pressure which is well above atmospheric pressure.
  • the absolute pressure at time t3 can be, for example, 3 bar.
  • the actual sterilization takes place, which may extend, for example, over 40 minutes. Due to the increased pressure and the steam atmosphere with a temperature of about 140 ° C, germs and pathogens in the towels are rendered harmless.
  • a valve is opened so that the vapor can escape from the chamber 15.
  • the pressure drops to atmospheric pressure over a period of about 1 minute.
  • the chamber is evacuated to a pressure of about 50 mbar.
  • the pressure at time t5 is thus significantly lower than the pressure after at time t1.
  • the pressure of 50 mbar is maintained for a period of about 20 minutes.
  • the moisture in the towels evaporates completely during this period so that the towels are dry at time t6.
  • the chamber 15 is then returned to atmospheric pressure, completing the sterilization cycle at time 2.
  • the towels can be removed from the chamber 15 and are ready for further use.
  • the required for the sterilization cycle negative pressure in the chamber 15 is generated by means of a liquid ring vacuum pump 16 which is connected via a suction passage 17 to the chamber 15.
  • the suction tract 17 comprises a Line extending between the chamber 15 and the liquid ring vacuum pump 16 and arranged in front of the working chamber input portion of the vacuum pump 16. At the transition from the chamber 15 to the suction passage 17, an outlet valve 30 is arranged.
  • a spray head 18 is arranged, which forms a liquid mouth according to the invention.
  • the spray head 18 is connected via a switching valve 19 with a fresh water connection 20.
  • the switching valve 19 When the switching valve 19 is opened, water exits in a finely divided form from the spray head 18 and distributed in the suction duct 17.
  • the operating fluid forms the liquid ring during operation of the vacuum pump 16 , which seals the impeller against the housing.
  • the liquid supplied from the spray head 18 is conveyed to the output side 21 of the vacuum pump 16 together with the medium sucked from the chamber 15.
  • a separator 22 the liquid and gaseous components of the pumped medium are separated from each other and the gaseous components are released to the environment. By an overflow 23 excess water is released.
  • a return line 24 extends in the direction of the spray head 18 and the inlet 25 for the operating fluid.
  • a check valve 26 is arranged in the return line 24.
  • the switching valve 19 When the switching valve 19 is opened, the fresh water exits with a pressure that is higher than the pressure in the separator 22.
  • the check valve 26 closes, so that the fresh water can flow only in the direction of the vacuum pump 16 and not in the separator 22. If the switching valve 19 is closed, opens the check valve 26 and the liquid from the separator 22 can flow in the direction of the vacuum pump 16. There is then a closed circuit from the vacuum pump 16 via the separator 22 and the return line 24 back to the vacuum pump 16.
  • the switching valve 19 is connected to a controller 27 so that the switching valve 19 opens and closes according to control commands from the controller 27.
  • the controller 27 receives measurement signals from a pressure sensor 28 and a temperature sensor 29.
  • the pressure sensor 28 measures the pressure in the suction tract 17 and is configured to give a control signal when the pressure in the suction tract drops below 100 mbar.
  • the temperature sensor 29 measures the temperature of the medium exiting the vacuum pump 16 and is configured to give a control signal when the temperature of the exiting medium exceeds the maximum outlet temperature (e.g., 60 ° C).
  • the controller 27 is designed to open the switching valve 19 when it receives a control signal from one of the sensors 28, 29.
  • the exhaust valve 30 is opened and the vacuum pump 16 is activated.
  • the vacuum pump 16 sucks the air from the chamber 15 and evacuates the chamber 15 to a pressure of about 120 mbar. If the pressure of about 120 mbar is reached, the outlet valve 30 is closed and admitted from a nozzle, not shown, of the autoclave 14 steam in the chamber 15.
  • the temperature of the operating fluid can be in This phase, for example, between 50 ° C and 60 ° C lie. As long as the pressure remains above 120 mbar, cavitation in the vacuum pump 16 does not occur despite this temperature of the operating fluid. Excess fluid quantities can still be disposed of via the normal wastewater at this temperature.
  • the exhaust valve 30 is opened again and the vacuum pump 16 starts the evacuation process. From the chamber 15 steam is now sucked.
  • the steam which can not be simply released into the environment in a hospital, must be condensed. In the arrangement according to the invention, this is done by spraying liquid into the suction tract 17. The vapor comes into contact with the liquid and is cooled so that it condenses almost completely.
  • the arrangement according to the invention thus functions as a mixed condenser.
  • the vacuum pump 16 starts functioning from the time t2
  • the pressure in the suction tract 17 drops below atmospheric pressure within a short time. Due to the negative pressure, water is sucked out of the separator 22, which enters the suction tract 17 via the spray head 18.
  • the interaction between the sprayed water and the steam takes place substantially before entering the working space of the vacuum pump 16, which means that the vacuum pump primarily promotes water. This process with the introduction of a steam pulse and subsequent evacuation with condensation of the vapor is repeated twice.
  • the pressure in the suction tract 17 is continuously above 100 mbar in this phase, so that the threshold value at which the pressure sensor 28 outputs a control signal does not fall below becomes. As long as the temperature of the water exiting from the vacuum pump 16 remains below 60 ° C, no control signal will come from the temperature sensor 29. The switching valve 19 thus remains closed. The water flows in a closed circuit from the vacuum pump 16 via the separator 22 and the return line 24 back to the vacuum pump, wherein excess water is discharged continuously through the overflow 23. The excess water results primarily from the condensate of the coming out of the chamber 15 steam.
  • the condensation of the steam continuously supplies heat to the liquid, so that the temperature of the liquid in the system continuously increases.
  • the temperature sensor 29 outputs a control signal and the switching valve 19 of the fresh water connection 20 is opened. It then enters cool water at a temperature of, for example, 20 ° C in the system, while the heated water exits through the overflow 23 from the system.
  • the controller 27 is programmed to close the switching valve 19 again when the fluid in the system has been substantially completely replaced once. For example, if the amount of fluid in the system is about 10 liters, the switching valve 19 may be closed again after this volume of fresh water has been supplied. After replacing the water, the closed circuit starts again with the fresh water.
  • the outlet valve 30 remains closed and the vacuum pump 16 is inoperative. After completion of the sterilization, the outlet valve 30 is opened at time t4. The pressurized steam exits the chamber 15 so that the pressure within the chamber 15 drops to atmospheric pressure within about 1 minute. Just above atmospheric pressure, the vacuum pump 16 is put into operation, so that the evacuation starts quickly.
  • the controller 27 therefore receives a control signal via a line 31 as soon as the outlet valve 30 is opened at the time t4.
  • the switching valve 19 is opened, so that fresh water flows in the direction of the spray head 18.
  • the pressure of the public water network is generally 4 bar and thus higher than the pressure in the chamber 15. The normal water pressure is thus sufficient to inject the water into the intake tract 17. If the water pressure is insufficient in individual cases, it can be increased by suitable means.
  • the sprayed water is pressed together with the condensate through the vacuum pump 16 through, even if the vacuum pump 16 is not in operation.
  • the pressure builds up so by itself.
  • the switching valve 19 When the vacuum pump is put into operation just above atmospheric pressure, the switching valve 19 is first closed.
  • the system is substantially completely filled with fresh water so that the water can be circulated for a time before exceeding the limit of 60 ° C at the outlet of the vacuum pump 16. If the water has heated again to this value, the temperature sensor 29 outputs a control signal and the heated water is exchanged with fresh water.
  • the pressure sensor 28 If the chamber 15 is evacuated to 100 mbar, the pressure sensor 28 outputs a control signal.
  • the switching valve 19 opens and the system is filled with fresh water. This is to avoid cavitation, which would be expected if at a water temperature in the order of 60 ° C, the pressure would be less than 100 mbar. Air can be admitted into the vacuum pump 16 via a valve 32 in order to further reduce the risk of cavitation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Claims (15)

  1. Dispositif constitué d'une pompe à vide (16) et d'une chambre (15), un conduit d'aspiration (17) s'étendant entre la chambre (15) et la pompe à vide (16) et la pompe à vide (16) étant une machine à anneau liquide, caractérisé en ce que, dans le conduit d'aspiration (17), se trouve une embouchure de liquide (18) afin de déplacer hors de la chambre (15) le gaz aspiré avec du liquide.
  2. Dispositif selon la revendication 1, caractérisé en ce que la pompe à vide (16) est conçue pour produire, dans la chambre (15), un vide inférieur à 150 mbar, de préférence inférieur à 100 mbar, de préférence inférieur à 70 mbar.
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que l'embouchure de liquide (18) comprend une ouverture de pulvérisation.
  4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que, du côté de la sortie (21) de la pompe à vide (16), est raccordé un séparateur (22) afin de collecter les quantités de liquide refoulées avec la pompe à vide (16).
  5. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce qu'une conduite de retour (24) pour le liquide est prévue, qui s'étend du côté de la sortie (21) de la pompe à vide (16) jusqu'à l'embouchure de liquide (18).
  6. Dispositif selon la revendication 5, caractérisé en ce que la pompe à vide (16) comprend une entrée (25) pour l'alimentation d'un liquide d'exploitation et en ce que l'entrée (25) est reliée avec la conduite de retour (24).
  7. Dispositif selon l'une des revendications 1 à 6, caractérisé par un raccord d'eau fraîche (20) pour l'alimentation d'un liquide dans l'embouchure de liquide (18) et/ou dans l'entrée (25) pour le liquide d'exploitation.
  8. Dispositif selon la revendication 7, caractérisé en ce que le raccord d'eau fraîche (20) débouche dans la conduite de retour (24) et en ce que, dans la conduite de retour (24), entre le raccord d'eau fraîche (20) et le côté de la sortie (21) de la pompe à vide (16), se trouve un clapet anti-retour (26).
  9. Dispositif selon la revendication 7 ou 8, caractérisé en ce que le raccord d'eau fraîche (20) est muni d'une soupape de commutation (19), la soupape de commutation (19) étant sous le contrôle d'un dispositif de commande (27).
  10. Dispositif selon la revendication 9, caractérisé en ce que le dispositif de commande (27) est relié avec un capteur de température (29) pour la température du liquide et en ce que le dispositif de commande (27) est conçu pour ouvrir la soupape de commutation (19) lorsque la température dépasse une valeur seuil prédéterminée.
  11. Dispositif selon la revendication 9 ou 10, caractérisé en ce que le dispositif de commande (27) est relié avec un capteur de pression (28) pour la pression dans le conduit d'aspiration (17) et en ce que le dispositif de commande (27) est conçu pour ouvrir la soupape de commutation (19) lorsque la pression diminue en dessous d'une valeur seuil prédéterminée.
  12. Procédé d'évacuation d'une chambre (15) remplie de vapeur, dans lequel une pompe à vide (16), qui est reliée à la chambre (15) par l'intermédiaire d'un conduit d'aspiration (17), est exploitée afin d'aspirer la vapeur hors de la chambre (15) et dans lequel un liquide est introduit dans le conduit d'aspiration (17), de façon à ce que la vapeur se condense.
  13. Procédé selon la revendication 12, caractérisé en ce que le liquide est retourné de la sortie de la pompe à vide (16) vers le conduit d'aspiration (17) lorsque la pression dans le conduit d'aspiration (17) est supérieure à une valeur seuil prédéterminée et lorsque la température du liquide à la sortie (21) de la pompe à vide (16) est inférieure à une valeur seuil prédéterminée.
  14. Procédé selon la revendication 13, caractérisé en ce que, dans le conduit d'aspiration (17) de l'eau fraîche est introduite lorsque la pression dans le conduit d'aspiration (17) diminue en dessous de la valeur seuil prédéterminée.
  15. Procédé selon la revendication 13 ou 14, caractérisé en ce que, dans le conduit d'aspiration (17) de l'eau fraîche est introduite lorsque la température du liquide à la sortie (21) de la pompe à vide (16) dépasse la valeur seuil prédéterminée.
EP14701014.4A 2013-01-21 2014-01-16 Agencement de pompes et procédé d'évacuation d'une chambre remplie de vapeur Active EP2946112B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14701014.4A EP2946112B1 (fr) 2013-01-21 2014-01-16 Agencement de pompes et procédé d'évacuation d'une chambre remplie de vapeur

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP13152022 2013-01-21
EP14701014.4A EP2946112B1 (fr) 2013-01-21 2014-01-16 Agencement de pompes et procédé d'évacuation d'une chambre remplie de vapeur
PCT/EP2014/050807 WO2014111471A1 (fr) 2013-01-21 2014-01-16 Agencement de pompe et procédé permettant de mettre sous vide une chambre remplie de vapeur

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EP2946112A1 EP2946112A1 (fr) 2015-11-25
EP2946112B1 true EP2946112B1 (fr) 2016-10-05

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US (1) US10047747B2 (fr)
EP (1) EP2946112B1 (fr)
CN (1) CN105026758B (fr)
IL (1) IL239742B (fr)
WO (1) WO2014111471A1 (fr)

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JP2018501429A (ja) * 2015-01-08 2018-01-18 ガードナー デンヴァー ナッシュ エルエルシーＧａｒｄｎｅｒ Ｄｅｎｖｅｒ Ｎａｓｈ Ｌｌｃ コンプレッサ型液封式ポンプにおける低圧封液入口領域
GB2571969B (en) * 2018-03-14 2020-10-07 Edwards Tech Vacuum Engineering Qingdao Co Ltd A liquid ring pump manifold with an integrated spray nozzle
GB2571970B (en) * 2018-03-14 2020-09-16 Edwards Tech Vacuum Engineering (Qingdao) Co Ltd A liquid ring pump manifold with integrated non-return valve
GB2571971B (en) 2018-03-14 2020-09-23 Edwards Tech Vacuum Engineering Qingdao Co Ltd Liquid ring pump control
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JP7213109B2 (ja) * 2019-03-14 2023-01-26 オルガノ株式会社 真空ポンプの流入気体における凝縮液の除去方法及び除去装置
GB2596366B (en) * 2020-06-26 2022-11-09 Edwards Tech Vacuum Engineering Qingdao Co Ltd Liquid ring pump control
CN116745529A (zh) * 2020-08-28 2023-09-12 埃地沃兹真空泵制造(青岛)有限公司 对进入液环泵的操作液体流的控制
CN113074113A (zh) * 2021-04-29 2021-07-06 华能国际电力股份有限公司营口电厂 一种水环式真空泵提效装置及控制方法
FR3129991B1 (fr) * 2021-12-08 2024-04-19 Pfeiffer Vacuum Ligne de vide, dispositif de pompage destiné à être raccordé à la ligne de vide et installation comportant la ligne de vide
CN119288863B (zh) * 2024-10-11 2025-08-08 江苏虹港石化有限公司 一种氧化结晶器抽真空装置

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CN105026758A (zh) 2015-11-04
IL239742A0 (en) 2015-08-31
US10047747B2 (en) 2018-08-14
WO2014111471A1 (fr) 2014-07-24
IL239742B (en) 2019-05-30
CN105026758B (zh) 2017-08-01
EP2946112A1 (fr) 2015-11-25
US20150361979A1 (en) 2015-12-17

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