Abstract: An object of the present invention is to reduce costs while maintaining safety in exhausting hydrogen sulfide gas. In exhaust facilities of a plant for manufacturing hydrogen sulfide gas, the concentrations of hydrogen sulfide gas leaking from a reaction facility, a cooling facility, and a sulfur removal facility, respectively, are measured by a measuring apparatus, and when a detected concentration is less than a predetermined concentration, a valve is controlled to exhaust hydrogen sulfide gas from a first exhaust pipe into the air, on the contrary, when a detected concentration is not less than a predetermined concentration, the valve is controlled to exhaust hydrogen sulfide gas from a second exhaust pipe to a gas treatment facility.

Abstract: An object is to provide a hydrogen sulfide gas production plant that can recover discharged waste hydrogen sulfide gas and efficiently supply the gas to a process plant where processing is conducted by using hydrogen sulfide gas, and also provide a method for recovering and using the waste hydrogen sulfide gas by the hydrogen sulfide gas production plant. In the present invention, the hydrogen sulfide gas production plant is provided with a pipe that recovers the waste hydrogen sulfide gas discharged from the hydrogen sulfide gas production plant and that has one end connected to the process plant where the hydrogen sulfide gas is used, and the discharged waste hydrogen sulfide gas is recovered and the recovered waste hydrogen sulfide gas is supplied to the process plant through the pipe.

Abstract: Damage of a lining-member is prevented through mitigation of stress concentration due to difference in thermal expansion. A lining-structure of a lining-member is provided on a base material of an insertion tube for adding a chemical to a reaction vessel for leaching under high temperature and high pressure. The base material has tube and flange sections. The lining-member is provided on the base material and formed of different material from the base material, and has a tube-lining section provided on the tube and flange lining sections provided on the flange-section. A chamfer-section is formed on the flange-section. The tube-lining section is protruded to the same height as a flat surface of the flange lining section. The flange lining-section has a curved surface-section protruded toward the base material side on the chamfer-section and is welded to a protruding-section of the tube-lining section that protrudes from a slant surface of the chamfer-section.

Abstract: Damage of a lining-member is prevented through mitigation of stress concentration due to difference in thermal expansion. A lining-structure of a lining-member is provided on a base material of an insertion tube for adding a chemical to a reaction vessel for leaching under high temperature and high pressure. The base material has tube and flange sections. The lining-member is provided on the base material and formed of different material from the base material, and has a tube-lining section provided on the tube and flange lining sections provided on the flange-section. A chamfer-section is formed on the flange-section. The tube-lining section is protruded to the same height as a flat surface of the flange lining section. The flange lining-section has a curved surface-section protruded toward the base material side on the chamfer-section and is welded to a protruding-section of the tube-lining section that protrudes from a slant surface of the chamfer-section.

Abstract: The present invention allows low-concentration hydrogen sulfide gas to be recovered and supplied to a processing plant that uses hydrogen sulfide gas. The hydrogen sulfide gas production plant is provided with a first supply pipe that supplies hydrogen sulfide gas obtained from a sulfur recovery facility to a processing plant, and a second supply pipe that is branched at a predetermined point in the first supply pipe and supplies the hydrogen sulfide gas from the sulfur recovery facility to the processing plant. The first supply pipe has a concentration meter that is provided on the upstream side than the branch point and measures the concentration of the hydrogen sulfide gas. The first supply pipe and the second supply pipe have ON/OFF valves that are provided on the downstream side of the branch point and perform ON/OFF control of the supply to the processing plant through the supply pipe.

Abstract: An object of the present invention is to reduce costs while maintaining safety in exhausting hydrogen sulfide gas. In exhaust facilities of a plant for manufacturing hydrogen sulfide gas, the concentrations of hydrogen sulfide gas leaking from a reaction facility, a cooling facility, and a sulfur removal facility, respectively, are measured by a measuring apparatus, and when a detected concentration is less than a predetermined concentration, a valve is controlled to exhaust hydrogen sulfide gas from a first exhaust pipe into the air, on the contrary, when a detected concentration is not less than a predetermined concentration, the valve is controlled to exhaust hydrogen sulfide gas from a second exhaust pipe to a gas treatment facility.

Abstract: The present invention allows low-concentration hydrogen sulfide gas to be recovered and supplied to a processing plant that uses hydrogen sulfide gas. The hydrogen sulfide gas production plant is provided with a first supply pipe that supplies hydrogen sulfide gas obtained from a sulfur recovery facility to a processing plant, and a second supply pipe that is branched at a predetermined point in the first supply pipe and supplies the hydrogen sulfide gas from the sulfur recovery facility to the processing plant. The first supply pipe has a concentration meter that is provided on the upstream side than the branch point and measures the concentration of the hydrogen sulfide gas. The first supply pipe and the second supply pipe have ON/OFF valves that are provided on the downstream side of the branch point and perform ON/OFF control of the supply to the processing plant through the supply pipe.

Abstract: By focusing on the fact that nitrogen dioxide exhibits an increased sterilizing effect among other sterilant gases including nitrogen oxide, the present invention is made to provide a sterilization method which may be suitably used for sterilizing items to be sterilized such as medical instruments which require increased reliability by using a high concentration NO2 gas of 5,000 ppm or above, for example. An inside of a sterilizing chamber containing an item to be sterilized is humidified, and a concentration of NO2 in the sterilizing chamber is made to be from 9 to 100 mg/L by filling a high concentration NO2 gas.

Abstract: An object is to provide a hydrogen sulfide gas production plant that can recover discharged waste hydrogen sulfide gas and efficiently supply the gas to a process plant where processing is conducted by using hydrogen sulfide gas, and also provide a method for recovering and using the waste hydrogen sulfide gas by the hydrogen sulfide gas production plant. In the present invention, the hydrogen sulfide gas production plant is provided with a pipe that recovers the waste hydrogen sulfide gas discharged from the hydrogen sulfide gas production plant and that has one end connected to the process plant where the hydrogen sulfide gas is used, and the discharged waste hydrogen sulfide gas is recovered and the recovered waste hydrogen sulfide gas is supplied to the process plant through the pipe.

Abstract: A high concentration NO2 gas generating system including a circulating path configured by connecting a chamber, a plasma generator, and a circulating means, wherein NO2 is generated by circulating a gas mixture including nitrogen and oxygen in the circulating path is provided. The high concentration NO2 gas generating system provides a high concentration NO2 generating system and the high concentration NO2 generating method using the generating system by which NO2 of high concentration (approximately 500 ppm or above) required for a high level of sterilization process in such as sterilization of medical instruments can be simply and selectively obtained. In addition, since indoor air is used as an ingredient, the management of ingredients is simple and highly safe, and the high concentration of NO2 can be simply and selectively prepared on demand.

Abstract: A high concentration NO2 gas generating system including a circulating path configured by connecting a chamber, a plasma generator, and a circulating means, wherein NO2 is generated by circulating a gas mixture including nitrogen and oxygen in the circulating path is provided. The high concentration NO2 gas generating system provides a high concentration NO2 generating system and the high concentration NO2 generating method using the generating system by which NO2 of high concentration (approximately 500 ppm or above) required for a high level of sterilization process in such as sterilization of medical instruments can be simply and selectively obtained. In addition, since indoor air is used as an ingredient, the management of ingredients is simple and highly safe, and the high concentration of NO2 can be simply and selectively prepared on demand.

Abstract: A high concentration NO2 gas generating system including a circulating path configured by connecting a chamber, a plasma generator, and a circulating means, wherein NO2 is generated by circulating a gas mixture including nitrogen and oxygen in the circulating path is provided. The high concentration NO2 gas generating system provides a high concentration NO2 generating system and the high concentration NO2 generating method using the generating system by which NO2 of high concentration (approximately 500 ppm or above) required for a high level of sterilization process in such as sterilization of medical instruments can be simply and selectively obtained. In addition, since indoor air is used as an ingredient, the management of ingredients is simple and highly safe, and the high concentration of NO2 can be simply and selectively prepared on demand.

Abstract: A high concentration NO2 gas generating system including a circulating path configured by connecting a chamber, a plasma generator, and a circulating means, wherein NO2 is generated by circulating a gas mixture including nitrogen and oxygen in the circulating path is provided. The high concentration NO2 gas generating system provides a high concentration NO2 generating system and the high concentration NO2 generating method using the generating system by which NO2 of high concentration (approximately 500 ppm or above) required for a high level of sterilization process in such as sterilization of medical instruments can be simply and selectively obtained. In addition, since indoor air is used as an ingredient, the management of ingredients is simple and highly safe, and the high concentration of NO2 can be simply and selectively prepared on demand.

Abstract: An exhaust system is provided for exhausting an exhaust gas used for sterilizing an item to be sterilized by using a high concentration NO2 gas, including an ozone generator, a gas treatment means for adsorbing ozone generated by the ozone generator and NO2 in the exhaust gas and accelerating generation of dinitrogen pentoxide or nitric acid by a reaction of the ozone and NO2 to retain the resultant, and an exhaust apparatus for exhausting the exhaust gas. The exhaust system can effectively and ably purify a high concentration NO2 exhaust gas having a concentration beyond the normal level.

Abstract: By focusing on the fact that nitrogen dioxide exhibits an increased sterilizing effect among other sterilant gases including nitrogen oxide, the present invention is made to provide a sterilization method which may be suitably used for sterilizing items to be sterilized such as medical instruments which require increased reliability by using a high concentration NO2 gas of 5,000 ppm or above, for example. An inside of a sterilizing chamber containing an item to be sterilized is humidified, and a concentration of NO2 in the sterilizing chamber is made to be from 9 to 100 mg/L by filling a high concentration NO2 gas.

Abstract: A sterilizer includes: a supply source for a sterilizing agent; a first sterilization chamber and a second sterilization chamber each adapted to be filled with the sterilizing agent while placing an object therein so as to subject the object to a sterilization treatment; a first pipe line connecting the supply source and each of the first sterilization chamber and the second sterilization chamber; a second pipe line connecting the first sterilization chamber and the second sterilization chamber; and a supply mechanism adapted to allow a residual part of the sterilizing agent used for the sterilization treatment in the first sterilization chamber to be introduced into the second sterilization chamber via the second pipe line.

Abstract: In a semiconductor laser module with an optical isolator where the form of a metal holder for holding a fiber stub varies, optical-isolator parts are miniaturized and unified, simplifying product management, reducing delivery time and cost. A fiber stub with an optical isolator is provided in such a manner that a stepped surface is formed on an end surface of a ferrule, where an optical fiber has been inserted and secured to a through hole formed at the center of the ferrule. The fiber stub is formed by attaching an optical isolator element composed of a polarizer and a Faraday rotator to the stepped surface.

Abstract: In a semiconductor laser module with an optical isolator where the form of a metal holder for holding a fiber stub varies, optical-isolator parts are miniaturized and unified, simplifying product management, reducing delivery time and cost. A fiber stub with an optical isolator is provided in such a manner that a stepped surface is formed on an end surface of a ferrule, where an optical fiber has been inserted and secured to a through hole formed at the center of the ferrule. The fiber stub is formed by attaching an optical isolator element composed of a polarizer and a Faraday rotator to the stepped surface.

Abstract: A music apparatus is communicable with a supervisory computer through a network for remotely training a user in matching with a skill level. In the music apparatus, an instrument is manually operable by the user for generating a performance. A monitor displays a lesson score in matching with the skill level so that the user is prompted to render the displayed lesson score by operating the instrument for generating a sample performance. A processor compares event data representative of the sample performance with note data representative of the lesson score to locally execute a quantitative evaluation of the sample performance. A transmitter transmits the event data representative of the sample performance to the supervisory computer through the network so that the supervisory computer can work to remotely provide a qualitative evaluation of the sample performance according to the event data to thereby arrange instruction data.

Abstract: A fully computerized musical performance teaching system comprises a computer apparatus having a keyboard and a display and is connectable to an electronic musical instrument. An application program provides the computer with various functions such as of judging student's skills, selecting music pieces for practice, training the student in performance and evaluating the student's progress through the teaching course. The judging function is to judge the student's performance skill from the student's responses to the subjects which the computer presents. The selecting function is to select a piece of music for practice according to the judgment results and the student's wishes and also to select a tutoring manner from among several prepared manners. The training function is to plan a practice schedule to meet the student's performance skill and wishes and to let the student practice with proper music pieces.