WO1987001185A1 - Oxygen gas production unit - Google Patents
Oxygen gas production unit Download PDFInfo
- Publication number
- WO1987001185A1 WO1987001185A1 PCT/JP1986/000410 JP8600410W WO8701185A1 WO 1987001185 A1 WO1987001185 A1 WO 1987001185A1 JP 8600410 W JP8600410 W JP 8600410W WO 8701185 A1 WO8701185 A1 WO 8701185A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- liquid
- oxygen
- air
- liquid oxygen
- oxygen gas
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04763—Start-up or control of the process; Details of the apparatus used
- F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
- F25J3/04812—Different modes, i.e. "runs" of operation
- F25J3/0483—Rapid load change of the air fractionation unit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
- F25J3/04078—Providing pressurised feed air or process streams within or from the air fractionation unit providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression
- F25J3/0409—Providing pressurised feed air or process streams within or from the air fractionation unit providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression of oxygen
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
- F25J3/04254—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using the cold stored in external cryogenic fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
- F25J3/04284—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams
- F25J3/04309—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams of nitrogen
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04406—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a dual pressure main column system
- F25J3/04412—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a dual pressure main column system in a classical double column flowsheet, i.e. with thermal coupling by a main reboiler-condenser in the bottom of low pressure respectively top of high pressure column
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04763—Start-up or control of the process; Details of the apparatus used
- F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
- F25J3/04812—Different modes, i.e. "runs" of operation
- F25J3/04824—Stopping of the process, e.g. defrosting or deriming; Back-up procedures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04763—Start-up or control of the process; Details of the apparatus used
- F25J3/04866—Construction and layout of air fractionation equipments, e.g. valves, machines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2210/00—Processes characterised by the type or other details of the feed stream
- F25J2210/50—Oxygen
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2235/00—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams
- F25J2235/50—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams the fluid being oxygen
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2250/00—Details related to the use of reboiler-condensers
- F25J2250/30—External or auxiliary boiler-condenser in general, e.g. without a specified fluid or one fluid is not a primary air component or an intermediate fluid
- F25J2250/50—One fluid being oxygen
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2250/00—Details related to the use of reboiler-condensers
- F25J2250/30—External or auxiliary boiler-condenser in general, e.g. without a specified fluid or one fluid is not a primary air component or an intermediate fluid
- F25J2250/52—One fluid being oxygen enriched compared to air, e.g. "crude oxygen"
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
- F25J2290/62—Details of storing a fluid in a tank
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S62/00—Refrigeration
- Y10S62/912—External refrigeration system
- Y10S62/913—Liquified gas
Definitions
- the present invention relates to an oxygen gas producing apparatus capable of easily producing high-purity oxygen gas.
- oxygen gas has been produced by using an air separation device to separate the two using the difference in the boiling points of nitrogen and oxygen.
- the air separation device includes an expansion turbine to generate cold required for liquefaction and separation of air, and utilizes the Joule-Thomson effect by adiabatic expansion.
- the present invention has been made in view of such circumstances, and an object of the present invention is to provide an oxygen gas producing apparatus capable of coping with load fluctuations while keeping the purity of the obtained product oxygen gas constant.
- an oxygen gas producing apparatus comprises: an air compressing means for compressing air taken in from the outside; and carbon dioxide gas and moisture in compressed air compressed by the air compressing means. Remove to remove Removing means, heat exchange means for cooling the compressed air passing through the removing means to an ultra-low temperature, and liquefaction and separation of the compressed air cooled to an extremely low temperature by the heat exchanging means to keep nitrogen in a gaseous state and oxygen in a liquid state. And a liquid oxygen storage means for receiving and storing liquid oxygen from outside the apparatus, and introducing the liquid oxygen in the liquid oxygen storage means into the rectification tower as a cold source for liquefying compressed air.
- the first introduction path and the level of the liquid oxygen held in the rectification column are monitored, and the supply amount of the liquid oxygen from the liquid oxygen storage means is changed in accordance with the vertical change of the level of the liquid oxygen.
- Liquid level detection control means to be suppressed a second introduction path for guiding the gaseous nitrogen held in the rectification tower as a refrigerant to the heat exchange means;
- a configuration that the liquid body oxygen has an oxygen gas takeout path for taking out the vapor of oxygen generated by guiding heat-exchanged in the heat exchange means as a refrigerant as a product oxygen gas.
- the oxygen gas producing apparatus of the present invention is provided with both an expander and an external cooling liquid oxygen supply means, and the expander for which it is difficult to quickly change the operating speed always operates at a constant speed.
- the purity is reduced to increase or decrease the amount of oxygen gas generated. Instead, it has the excellent effect of being able to respond quickly to changes in the demand for product oxygen gas.
- FIG. 1 is a configuration diagram of one embodiment of the present invention
- FIG. 2 is a plan view of a pressure pump
- FIG. 3 is a cross-sectional view thereof.
- FIG. 1 shows an embodiment of the present invention.
- 9 is an air compressor
- 10 is a drain separator
- 11 is a chlorofluorocarbon cooler
- 12 is a set of 2 ⁇ 1 adsorption cylinders, and a molecular sieve inside which exhibits excellent adsorption capacity at low temperatures ) Is filled, and adsorption and regeneration are performed alternately.
- one of the adsorption cylinder 1 2 while the H 2 0 and CO z in the air cooled by the addition CFC cooler 1 1 is compressed by the air compressor 9 for removing adsorption, the other adsorption column 12 performs regeneration of the adsorbent.
- 7 is a first heat exchanger
- the compressed air to H 2 0 and C 0 2 is adsorbed divided by adsorption cylinder 1 2 is fed through a compressed air Kyoawase Paibu 8.
- the compressed air sent here is cooled to an extremely low temperature by the heat exchange operation of the first heat exchanger 7.
- Reference numeral 13 denotes a rectification tower, and 1.5 denotes a lower tower of the first heat exchanger 7.
- compressed air cooled to an extremely low temperature from the cold generated by the expansion turbine 31 and sent through the pipe 8 is collected. Distillation is performed in countercurrent contact with the reflux liquid generated and flowing down in the condenser 17 and stored as oxygen-rich liquid air 18 at the bottom, and only nitrogen is kept at the top in a gaseous state.
- Reference numeral 14 denotes an upper tower of the rectification tower 13 in which the condenser 17 is disposed.
- a part of the nitrogen gas stored in the upper part of the lower tower 15 in the rectification tower 13 is sent to the condenser 17 via a pipe 24 and liquefied, and is passed through a pipe 25 to be liquefied.
- the liquid is supplied to the nitrogen reservoir 26 as the reflux liquid.
- the pressure in the upper tower 14 is lower than that in the lower tower 15, and the liquid air stored at the bottom of the lower tower 15 (N 2 : 50 to 70%, O 2 : 30) ( ⁇ 50%) 18 Powerful, passed through the pipe 21 and cooled by the second heat exchanger 21a, further adiabatically expanded by the expansion valve 20 and sent in, and its low boiling point component Nitrogen is vaporized and oxygen is stored at the bottom in a liquid state.
- Reference numeral 28 denotes a second inlet pipe for extracting nitrogen (purity is not so high) accumulated in the upper part of the upper tower 14 as waste nitrogen gas, and guides the waste nitrogen gas to the first heat exchanger 7. Then, the raw air is cooled to ultra-low temperature by the cold heat, and the waste nitrogen gas after heat exchange is released to the atmosphere as shown by arrow A.
- liquid oxygen is supplied as a cold source from the liquid oxygen storage tank 23 through the first inlet pipe 23 a, and the liquid generated in the upper tower 14 The internal condenser 17 is cooled together with oxygen.
- the liquid oxygen storage tank 23 is supplied with liquid oxygen from outside via a pipe 27 from a tank trolley or the like.
- Reference numeral 27a denotes a variable opening valve provided on the first introduction pipe 23a, which is controlled by a liquid level gauge 22a. That is, the opening variable valve 27 a is a valve whose opening is adjusted by the liquid level meter 22 a according to the liquid level of the liquid oxygen 22 collected at the bottom in the upper tower 14.
- the opening variable valve 27 a is a valve whose opening is adjusted by the liquid level meter 22 a according to the liquid level of the liquid oxygen 22 collected at the bottom in the upper tower 14.
- Reference numeral 29 denotes a second introduction pipe for taking out the nitrogen gas stored in the upper part of the lower tower 15 and guiding it to the first heat exchanger 7. Both the second introduction pipe 29 and the second introduction pipe 28 can be collectively in that the nitrogen gas in the rectification column 13 is included in the first heat exchanger 7. .
- Reference numeral 30 denotes a pipe for taking out the waste nitrogen gas sent into the first heat exchanger 7 by the second introduction path pipe 29 from the middle of the first heat exchanger 7. Into the expansion turbine 31.
- This expansion turbine 31 is a known one, and adiabaticly expands the taken-out waste nitrogen gas to generate cold heat, which is combined with the waste nitrogen gas flowing through the second introduction pipe 28. To extremely cool and send it to the first heat exchanger 7 again. ing.
- Reference numeral 32 denotes a liquid oxygen extraction pipe having one end opened at a position above the bottom of the upper tower 14, and sends out liquid oxygen staying at the bottom of the tower 14 to the liquid oxygen pressurizing pump 33.
- the above-mentioned pressurizing pump 33 pressurizes oxygen to a predetermined pressure in a liquid state.
- a high-speed rotating motor 1 26 is mounted on a motor support base 125.
- a main shaft 135 is provided through the center of the motor support base 125, the liquid oxygen leak preventing portion 128 and the compression portion 127.
- 1 3 5 is connected to the rotation 1 2 6 a of the motor 1 2 6 via the force pulling 1 3 6, and is provided inside the motor support base 1 2 5 and the bearing cover 1
- the above-mentioned compression section 127 comprises two spiral impellers 144 mounted on the main shaft 135 in two upper and lower stages and a casing for accommodating them.
- liquid oxygen is sucked from the central suction port 144a of the impeller 146, and is discharged from the outer discharge port 16b in a pressurized state. That is, by the rotation of the impeller 146, liquid oxygen is sucked from the suction nozzle 148, and is first pressurized by the first stage impeller 146, and then the pressurized fluid is passed through the conduction path 1.
- the second stage impeller 1 46 pressurizes the liquid oxygen via 47 to raise the liquid oxygen to a predetermined pressure.
- the above-mentioned liquid oxygen leak prevention part 128 encloses the outer periphery of the main shaft 135 with a sleeve 150, and further provides a labyrinth 150 and a labyrinth cover 152 around the outer periphery of the sleeve 150. Liquid oxygen is prevented from leaking from the compression section 127 and reaching the motor support base 125 to cause an explosion.
- the motor support bases 125 are hermetically divided into three parts to prevent leaked oxygen from reaching the motor side.
- reference numeral 34 denotes an oxygen transport pipe, which sends the liquid oxygen pressurized by the pressurizing pump 33 to the first heat exchanger 7 via the second heat exchanger 21a.
- Reference numeral 35 denotes a product oxygen gas extraction pipe for sending the product oxygen gas at room temperature from the first heat exchanger 7 to the outside of the system.
- Reference numeral 36 denotes a backup system line.When the air compression system line fails, the valve 36a is opened, and the liquid oxygen in the liquid oxygen storage tank 23 is evaporated by the evaporator 37 and sent to the pipe 35. However, supply of oxygen gas should not be stopped.
- the one-point line indicates a vacuum cool box. This vacuum insulated box blocks out heat from the outside and further improves purification efficiency. '
- This device produces product oxygen gas as follows. That is, the air is compressed by the air compressor 9, the moisture in the air compressed by the drain separator 10 is removed, and the air is cooled by the Freon cooler 11. feed, to adsorb and remove H 2 0 and C 0 2 in air. Next, the compressed air from which H 20 and CO z have been adsorbed and removed is sent to the first heat exchanger 7 where it is cooled to an extremely low temperature, and is then charged into the lower tower 15 of the rectification tower 13. Next, the charged compressed air is brought into countercurrent contact with the overflowing liquid nitrogen from the liquid nitrogen reservoir 26, a part of which is liquefied and stored as liquid air 18 at the bottom of the lower tower 15.
- oxygen which is a high-boiling component in compressed air
- Nitrogen remains as a gas.
- the nitrogen gas remaining as this gas was taken out from the second introduction path pipe 29, sent to the first heat exchanger 7, and taken out from the pipe 30 when the temperature was raised to about 140 ° C.
- the nitrogen gas sent to the expansion turbine 31 is adiabatically expanded by the expansion turbine 31 to generate cold heat, and in that state, the waste gas sent from the upper tower 14 by the second introduction pipe vip 28 is discharged. It is cooled by being combined with nitrogen gas, and heat-exchanged with the compressed air sent into the heat exchanger 7 in the first heat exchanger 7 to cool it to an extremely low temperature.
- the oxygen-rich liquid air collected at the bottom of 15 is connected to the second heat exchanger
- the liquid air 18 thus fed into the upper tower 14 in the upper tower 14 is vaporized by the difference in boiling points and is transferred to the upper part by vaporizing nitrogen, liquefying oxygen and flowing down and liquid oxygen at the bottom. 2 Save as 2.
- the liquid oxygen extraction pipe 32 takes out the liquid oxygen 22 collected at the bottom thereof, pressurizes it with a liquid oxygen pressurizing pump 33, and then heats the second and first heat exchangers 21a, 7 Heat exchange in the product and sent to the extraction pipe 35 as oxygen gas. In this way, high purity oxygen gas is produced.
- this device can respond quickly to fluctuations in demand while maintaining a constant purity even when the amount of lightning required for product oxygen gas changes. This is the most significant feature. That is, if the demand amount of the product oxygen gas rapidly increases, the amount of the liquid oxygen 22 retained in the upper tower 14 decreases, whereby the liquid level becomes lower than a predetermined height. As a result, the level gauge 2
- the oxygen gas producing apparatus of this embodiment not only produces high-purity oxygen gas, but also supplies the liquid oxygen from the liquid oxygen storage tank 23 while keeping the cooling capacity of the expansion turbine 31 constant.
- the volume with the liquid level meter 22a and the valve 27a the amount of oxygen gas generated can be reduced and the demand for the product oxygen gas can be smoothly increased and the demand can be changed smoothly.
- the product oxygen gas is delivered in a pressurized state for the purpose of facilitating the use of the product oxygen gas in the consumption side and the consumption side. Since the pressurization is performed in a liquid state instead of in a liquid state, the pressurization efficiency increases and pressurization can be performed with a small amount of power.
- a large-scale device is required to pressurize it.However, since a liquid has a smaller volume than a gas, it is pressurized. Is relatively easy. In particular, oxygen is highly active, reacts with the lubricating oil of the pressurized pump in a gaseous state, and explodes immediately.In a liquid state, such a situation can be prevented, and the pump seal is also gaseous. Liquid has the advantage that it is easier and easier to perform than liquid.
- the opening of the variable opening valve 27a is controlled by the liquid level gauge 22a, but an opening and closing valve that opens and closes is operated instead of the variable opening valve 27a.
- the opening and closing of the on-off valve may be controlled by a liquid level gauge 22a.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Emergency Medicine (AREA)
- Separation By Low-Temperature Treatments (AREA)
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8686904929T DE3663997D1 (en) | 1985-08-23 | 1986-08-08 | Oxygen gas production unit |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60/186313 | 1985-08-23 | ||
JP60186313A JPH0781780B2 (ja) | 1985-08-23 | 1985-08-23 | 酸素ガス製造装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1987001185A1 true WO1987001185A1 (en) | 1987-02-26 |
Family
ID=16186145
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1986/000410 WO1987001185A1 (en) | 1985-08-23 | 1986-08-08 | Oxygen gas production unit |
Country Status (4)
Country | Link |
---|---|
US (1) | US4732595A (ja) |
EP (1) | EP0235295B1 (ja) |
DE (1) | DE3663997D1 (ja) |
WO (1) | WO1987001185A1 (ja) |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4954315A (en) * | 1988-02-03 | 1990-09-04 | Mg Industries | Method for recovery of sterilizing gas |
DE3913880A1 (de) * | 1989-04-27 | 1990-10-31 | Linde Ag | Verfahren und vorrichtung zur tieftemperaturzerlegung von luft |
FR2670278B1 (fr) * | 1990-12-06 | 1993-01-22 | Air Liquide | Procede et installation de distillation d'air en regime variable de production d'oxygene gazeux. |
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FR2706595B1 (fr) * | 1993-06-18 | 1995-08-18 | Air Liquide | Procédé et installation de production d'oxygène et/ou d'azote sous pression à débit variable. |
US5471843A (en) * | 1993-06-18 | 1995-12-05 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Process and installation for the production of oxygen and/or nitrogen under pressure at variable flow rate |
US6082136A (en) * | 1993-11-12 | 2000-07-04 | Daido Hoxan Inc. | Oxygen gas manufacturing equipment |
US5406800A (en) * | 1994-05-27 | 1995-04-18 | Praxair Technology, Inc. | Cryogenic rectification system capacity control method |
FR2723184B1 (fr) * | 1994-07-29 | 1996-09-06 | Grenier Maurice | Procede et installation de production d'oxygene gazeux sous pression a debit variable |
EP0908689A3 (en) * | 1997-08-20 | 1999-06-23 | AIR LIQUIDE Japan, Ltd. | Method and apparatus for air distillation |
US5996373A (en) * | 1998-02-04 | 1999-12-07 | L'air Liquide, Societe Ananyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Cryogenic air separation process and apparatus |
US6082135A (en) * | 1999-01-29 | 2000-07-04 | The Boc Group, Inc. | Air separation method and apparatus to produce an oxygen product |
EP1207362A1 (en) | 2000-10-23 | 2002-05-22 | Air Products And Chemicals, Inc. | Process and apparatus for the production of low pressure gaseous oxygen |
US7487648B2 (en) * | 2006-03-10 | 2009-02-10 | Praxair Technology, Inc. | Cryogenic air separation method with temperature controlled condensed feed air |
US20090019886A1 (en) * | 2007-07-20 | 2009-01-22 | Inspired Technologies, Inc. | Method and Apparatus for liquefaction of a Gas |
EP3719427A4 (en) * | 2017-11-29 | 2021-12-01 | L'AIR LIQUIDE, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude | CRYOGENIC DISTILLATION PROCESS AND DEVICE FOR GENERATING COMPRESSED AIR BY USING AN EXPANDER-BOOSTER IN COMBINATION WITH A NITROGEN EXPANDER FOR BRAKING |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS59164874A (ja) * | 1983-03-08 | 1984-09-18 | 大同酸素株式会社 | 窒素ガス製造装置 |
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Publication number | Priority date | Publication date | Assignee | Title |
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DE1067046B (de) * | 1956-01-04 | 1959-10-15 | Union Carbide Corporation, New York, N. Y. (V. St. A.) | Verfahren zum Zerlegen eines Gasgemisches bei niedriger Temperatur und Vorrichtunig zur Durchführung des Verfahrens |
US3039274A (en) * | 1958-03-28 | 1962-06-19 | Union Carbide Corp | Process and apparatus for purifying and separating compressed gas mixtures |
JPS4940071B1 (ja) * | 1970-01-09 | 1974-10-30 | ||
GB2125949B (en) * | 1982-08-24 | 1985-09-11 | Air Prod & Chem | Plant for producing gaseous oxygen |
GB2129115B (en) * | 1982-10-27 | 1986-03-12 | Air Prod & Chem | Producing gaseous nitrogen |
JPS59137779A (ja) * | 1983-01-28 | 1984-08-07 | 株式会社日立製作所 | 空気分離装置 |
-
1986
- 1986-08-08 US US07/049,864 patent/US4732595A/en not_active Expired - Lifetime
- 1986-08-08 DE DE8686904929T patent/DE3663997D1/de not_active Expired
- 1986-08-08 EP EP86904929A patent/EP0235295B1/en not_active Expired
- 1986-08-08 WO PCT/JP1986/000410 patent/WO1987001185A1/ja active IP Right Grant
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59164874A (ja) * | 1983-03-08 | 1984-09-18 | 大同酸素株式会社 | 窒素ガス製造装置 |
Non-Patent Citations (1)
Title |
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See also references of EP0235295A4 * |
Also Published As
Publication number | Publication date |
---|---|
US4732595A (en) | 1988-03-22 |
EP0235295B1 (en) | 1989-06-14 |
DE3663997D1 (en) | 1989-07-20 |
EP0235295A1 (en) | 1987-09-09 |
EP0235295A4 (en) | 1987-12-09 |
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