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公开(公告)号:JPH1176385A
公开(公告)日:1999-03-23
申请号:JP24906797
申请日:1997-09-12
Applicant: EKIKA CARBON DIOXIDE CO , IKI KK
Inventor: KAMEYAMA YOSHICHIKA , TOMITA BUNSHIRO , INOUE YASUMASA , KAJIWARA AKIO , TAKANO SEIKI
IPC: A61L2/20
Abstract: PROBLEM TO BE SOLVED: To perfectly and safely execute the non-polluting of hazardous ethylene oxide-contg. waste gases with a device reduced in its size by providing the waste gas treating device with a mixer which mixes and dilutes the waste gases subjected to sterilization with air and a catalytic combustion reaction vessel which makes the resulted gaseous mixture composed of the ethylene oxide/air non-polluting. SOLUTION: In the case the gaseous ethylene oxide sterilizing device with the waste gas treating device is actually operated, a sterilizing vessel 1 is first hermetically closed and the gaseous mixture composed of, for example, 95% ethylene oxide + 5% carbon dioxide is gasified and is packed in this vessel. The heating of the catalytic reaction vessel 4 is then started and temp. control is executed at around 150 to 200 deg.C after the start of the sterilization. A vacuum pump 5 is operated after the end of the sterilization and the sterilized waste gases are heated by a heat exchanger 3 and are introduced into the mixer 2. The air (outdoor air) is sucked and is heated by the heat exchanger 3 and is then introduced into the mixer 2. The gaseous mixture composed of the ethylene oxide/air mixed in the mixer 2 is introduced through the heat exchanger 3 into the catalytic combustion reaction vessel 4 where the gaseous mixture is subjected to perfect combustion.
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公开(公告)号:JPH1176746A
公开(公告)日:1999-03-23
申请号:JP24906897
申请日:1997-09-12
Applicant: EKIKA CARBON DIOXIDE CO
Inventor: INOUE YASUMASA , KOSHIBE KAORU , KAJIWARA AKIO , KAMEYAMA YOSHICHIKA , MIYAJI HIROYUKI , TOMITA BUNSHIRO
Abstract: PROBLEM TO BE SOLVED: To provide a harmful exhaust gas treating device capable of discharging a harmful exhaust gas (particularly ethylene oxide gas discharged from an ethylene oxide sterilizer) in a completely intoxicated state and miniaturizing its self. SOLUTION: In the harmful exhaust gas treating device composed of a harmful gas adsorption and desorption vessel 1 and a catalytic combustion reaction vessel 4, the harmful exhaust gas is directly introduced into the adsorption and desorption vessel 1 to adsorb the high concentration harmful gas on an adsorbent in the adsorption and desorption vessel 1 and on the other hand, a previously heated air is introduced into the adsorption and desorption to gradually desorb the harmful gas adsorbed on the adsorbent 1 to form a harmful gas/air gaseous mixture containing the harmful gas in a preferable concentration and the resultant gaseous mixture is introduced into the catalytic combustion reaction vessel 4 to be completely combusted.
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公开(公告)号:JPH1137394A
公开(公告)日:1999-02-12
申请号:JP19445097
申请日:1997-07-18
Applicant: EKIKA CARBON DIOXIDE CO
Inventor: KAJIWARA AKIO , KOSHIBE KAORU , OIKAWA YUKIO , YAJIMA HIROSHI , INOUE ICHIRO
Abstract: PROBLEM TO BE SOLVED: To easily and accurately detect a small amount of water by collecting water in a metal pressure-proof vessel by tilting the metal pressure-proof vessel horizontally or slightly to the lateral position, fitting water to the side of the vessel, passing supersonic wave through water, thus detecting water in the metal pressure-proof vessel from a reflected wave. SOLUTION: On a frame on which a supersonic transmitting and receiving part of a supersonic digital detector is mounted, an empty metal pressure-proof vessel 1 after remaining gas is blown is tilted horizontally or slightly to the lateral position. By continuously and slowly pouring water into the portion surrounding a sensor of the supersonic transmitting and receiving part, a gap between the container side and the supersonic transmitting and receiving part 3 is filled with water (water column 2) so that air bubble should not enter. A transmitted wave and its reflected wave of the supersonic wave are allowed to pass through the water, and the water in the metal pressure-proof vessel is detected from the received reflected wave. By this, a small amount of water in the container can be easily and accurately detected.
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公开(公告)号:JPH10130010A
公开(公告)日:1998-05-19
申请号:JP28223096
申请日:1996-10-24
Applicant: NIPPON OXYGEN CO LTD , EKIKA CARBON DIOXIDE CO
Inventor: TAKEDA SUSUMU , HAYAKAWA SABURO , KAJIWARA AKIO , KOSHIBE KAORU
Abstract: PROBLEM TO BE SOLVED: To remove nitrogen oxide and CO by performing a catalytic reaction in the coexistence of plural specific gases to prevent the deterioration of the performance of a nitrogen oxide removing catalyst in a purifying method by removing impurities from a crude gaseous carbon dioxide containing at least nitrogen oxide and CO as the impurities. SOLUTION: The catalytic reaction of a reaction using preferably a noble metal (e.g. Pd) catalyst is performed in the coexistence of H2 and O2 under a prescribed pressure. That is, O2 is added simultaneously with or before or after the addition of H2 prior to the catalytic reaction, CO is allowed to react with O2 to convert to CO2 in the presence of the catalyst and at the same time, the reducing and removing reaction of nitrogen oxide is performed by H2 to prevent the lowering of the NO removing ratio caused by the obstruction due to the catalyst poisoning action of CO. That is, two catalytic reactions of the CO oxidation reaction and the nitrogen oxide reducing reaction are executed only in one process one time.
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公开(公告)号:JPH10130009A
公开(公告)日:1998-05-19
申请号:JP28222396
申请日:1996-10-24
Applicant: NIPPON OXYGEN CO LTD , EKIKA CARBON DIOXIDE CO
Inventor: TAKEDA SUSUMU , HAYAKAWA SABURO , KAJIWARA AKIO , KOSHIBE KAORU
Abstract: PROBLEM TO BE SOLVED: To provide a purifying method of gaseous carbon dioxide and the purifying device for gaseous carbon dioxide capable of obtaining a high purity gaseous carbon dioxide by preventing intrusion of nitrogen oxide and propylene in a purified gaseous carbon dioxide. SOLUTION: A trace of impurities is removed from a crude gaseous carbon dioxide and a liquefied carbon dioxide product is obtained by performing a compression process for compressing the crude gaseous carbon dioxide obtained by an alkanolamine absorption method and containing the impurities by a carbon dioxide compressor, a 1st adsorption process for adsorbing and removing the impurities such as water and acetaldehyde contained in trace quantity, a catalytic reaction process for decomposing nitrogen oxide under the presence of hydrogen by a catalytic reaction, a 2nd adsorption process for adsorbing and removing impurities such as water generated in the catalytic reaction process and a liquefaction purification process for separating a trace quantity of low b.p. component impurities such as oxygen, nitrogen and hydrogen by liquefaction rectification separation.
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公开(公告)号:JPH08215541A
公开(公告)日:1996-08-27
申请号:JP2313195
申请日:1995-02-10
Applicant: EKIKA CARBON DIOXIDE CO
Inventor: KAMEYAMA YOSHIFUMI , MIYAJI HIROYUKI , TOMITA BUNSHIRO , KAJIWARA AKIO , INOUE ICHIRO
Abstract: PURPOSE: To provide a treating device enabling to make the exhaust gas from an ethylene oxide gas sterilizer perfectly harmless and also hardly generating a secondary waste product or extremely lessening it. CONSTITUTION: An exhaust gas treating device is connected with an adsorption tower 1 for adsorbing the ethylene oxide gas in the exhaust gas and a catalystic combustion device 2 for burning the ethylene oxide gas in the exhaust gas in series.
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公开(公告)号:JPH08215540A
公开(公告)日:1996-08-27
申请号:JP2313095
申请日:1995-02-10
Applicant: EKIKA CARBON DIOXIDE CO
Inventor: KAMEYAMA YOSHIFUMI , MIYAJI HIROYUKI , TOMITA BUNSHIRO , KAJIWARA AKIO , INOUE ICHIRO
IPC: B01D53/72
Abstract: PURPOSE: To provide an ethylene oxide removing device enabling to surely lower ethylene oxide concentration in a sterilization gas, in spite of a compact size as compared with conventional devices. CONSTITUTION: The device for removing ethylene oxide from the exhaust gas discharged from an ethylene oxide gas sterilizer has two or more adsorption towers 11, 12, 13 connected in series, and an exhaust gas higher in ethylene oxide concentration is introduced into the first tower 12 at the most upstream side and an exhaust gas lower in ethylene oxide concentration is introduced into the adsorption tower 12 at the more downstream side.