Abstract: A method of cleaning an air diffuser apparatus component in a membrane filtration unit in which the air diffuser apparatus includes an air main pipe connected to at least one aeration blower, liquid supply piping that joins in midstream of the air main pipe, a branch conduit horizontally connected through a gas supply pipe branched from the air main pipe, and a plurality of air diffusion pipes horizontally disposed perpendicular to the branch pipe conduit, each of the plurality of diffusion pipes having a plurality of diffusion holes that open substantially vertically downward, involves setting a gas flow rate in the branch pipe conduit in a range of 1 m/sec or more and 8 m/sec or less, and a liquid supply rate in the branch pipe conduit in a range of 0.03 L/min/mm2 or more and 0.2 L/min/mm2 or less, whereby solid sludge that may adhere and clog diffusion holes of the air diffusion pipe during the filtering process is efficiently removed by a gas-liquid mixing fluid.

Abstract: This invention concerns an apparatus and a method for producing carbonated water capable of obtaining high concentration carbonated water effectively. Carbon dioxide gas is passed through a first carbon dioxide gas dissolver composed of a membrane module to be dissolved in water and the carbonated water passing through the first carbon dioxide gas dissolver is passed through a static mixer, which is a second carbon dioxide gas dissolver. Consequently, a high concentration carbonated water can be obtained remarkably, effectively and easily with a simpler structure than conventionally.

Abstract: The present invention relates to a nozzle suitable for jetting high pressure and high temperature steam, and a method and an apparatus for producing an entangled nonwoven fabric using the nozzle. According to the apparatus, a steam inlet side main conduit and a steam outlet side conduit are connected with both end parts of a tubular nozzle holder in a longitudinal direction provided integrally with nozzle members having a plurality of nozzle holes. A steam outlet side conduit is provided with an opening/closing valve and a trap conduit is branched from a conduit at an upstream side from the opening/closing valve. By opening the opening/closing valve, a rapid temperature rise of the nozzle holder can be enabled at a time of starting a production of a nonwoven fabric.

Abstract: The present invention relates to a nozzle suitable for jetting high pressure and high temperature steam, and a method and an apparatus for producing an entangled nonwoven fabric using the nozzle. According to the apparatus, a steam inlet side main conduit and a steam outlet side conduit are connected with both end parts of a tubular nozzle holder in a longitudinal direction provided integrally with nozzle members having a plurality of nozzle holes. A steam outlet side conduit is provided with an opening/closing valve and a trap conduit is branched from a conduit at an upstream side from the opening/closing valve. By opening the opening/closing valve, a rapid temperature rise of the nozzle holder can be enabled at a time of starting a production of a nonwoven fabric.

Abstract: A carbonic water production apparatus equipped with a carbonic acid gas dissolving apparatus and a circulation pump, wherein water in a bath is circulated by the circulation pump, and carbonic acid gas is fed into the carbonic acid gas dissolving apparatus to dissolve the carbonic acid gas in the water, and wherein the circulation pump is a positive-displacement metering pump having a self-priming ability; a carbonic water production method using this apparatus; a carbonic water production method including an early step for producing a carbonic water and a concentration maintaining step for the carbonic water; a carbonic water production apparatus equipped with a device for controlling the feeding pressure of carbonic water gas so as to give an intended concentration of carbonic acid gas; a carbonic water production apparatus which automatically discharges out a drain; and a carbonic water production apparatus combined with a portable foot bath.

Abstract: This invention concerns an apparatus and a method for producing carbonated water capable of obtaining high concentration carbonated water effectively. Carbon dioxide gas is passed through a first carbon dioxide gas dissolver composed of a membrane module to be dissolved in water and the carbonated water passing through the first carbon dioxide gas dissolver is passed through a static mixer, which is a second carbon dioxide gas dissolver. Consequently, a high concentration carbonated water can be obtained remarkably, effectively and easily with a simpler structure than conventionally.

Abstract: This invention concerns an apparatus and a method for producing carbonated water capable of obtaining high concentration carbonated water effectively. Carbon dioxide gas is passed through a first carbon dioxide gas dissolver (7) composed of a membrane module to be dissolved in water and the carbonated water passing through the first carbon dioxide gas dissolver (7) is passed through a static mixer (13), which is a second carbon dioxide gas dissolver. Consequently, a high concentration carbonated water can be obtained remarkably, effectively and easily with a simpler structure than conventionally.

Abstract: A carbonic water production apparatus equipped with a carbonic acid gas dissolving apparatus 3 and a circulation pump 1 wherein water in a bath 11 is circulated by the circulation pump 1, and a carbonic acid gas is fed into the carbonic acid gas dissolving apparatus 3 to dissolve the carbonic acid gas in the water, and wherein the circulation pump 1 is a positive-displacement metering pump having a self-priming ability; a carbonic water production method using this apparatus; a carbonic water production method comprising an early step for producing a carbonic water and a concentration maintaining step for the carbonic water; a carbonic water production apparatus equipped with a control for controlling the feeding pressure of carbonic water gas so that give an intended concentration of carbonic acid gas; a carbonic water production apparatus which automatically discharges out a drain; and a carbonic water production apparatus combined with a portable foot bath.

Abstract: A carbonic water production apparatus equipped with a carbonic acid gas dissolving apparatus 3 and a circulation pump 1, wherein water in a bath 11 is circulated by the circulation pump 1, and a carbonic acid gas is fed into the carbonic acid gas dissolving apparatus 3 to dissolve the carbonic acid gas in the water. The circulation pump 1 is a positive-displacement metering pump having a self-priming ability. A carbonic water production method using this apparatus is also provided, including an early step for producing carbonic water and a concentration maintaining step for the carbonic water. The carbonic water production apparatus includes a control for controlling the feeding pressure of carbonic water gas to give an intended concentration of carbonic acid gas. The carbonic water production apparatus automatically discharges out a drain. The carbonic water production apparatus is combined with a portable foot bath.

Abstract: The present invention relates to a nozzle suitable for jetting high pressure and high temperature steam, and a method and an apparatus for producing an entangled nonwoven fabric using the nozzle. According to the apparatus, a steam inlet side main conduit and a steam outlet side conduit are connected with both end parts of a tubular nozzle holder in a longitudinal direction provided integrally with nozzle members having a plurality of nozzle holes. A steam outlet side conduit is provided with an opening/closing valve and a trap conduit is branched from a conduit at an upstream side from the opening/closing valve. By opening the opening/closing valve, a rapid temperature rise of the nozzle holder can be enabled at a time of starting a production of a nonwoven fabric.

Abstract: The present invention relates to a nozzle suitable for jetting high pressure and high temperature steam, and a method and an apparatus for producing an entangled nonwoven fabric using the nozzle. According to the apparatus, a steam inlet side main conduit and a steam outlet side conduit are connected with both end parts of a tubular nozzle holder in a longitudinal direction provided integrally with nozzle members having a plurality of nozzle holes. A steam outlet side conduit is provided with an opening/closing valve and a trap conduit is branched from a conduit at an upstream side from the opening/closing valve. By opening the opening/closing valve, a rapid temperature rise of the nozzle holder can be enabled at a time of starting a production of a nonwoven fabric.

Abstract: The present invention relates to a nozzle suitable for jetting high pressure and high temperature steam, and a method and an apparatus for producing an entangled nonwoven fabric using the nozzle. According to the apparatus, a steam inlet side main conduit (c1) and a steam outlet side conduit (c3) are connected with both end parts of a tubular nozzle holder (11) in a longitudinal direction provided integrally with nozzle members (15, 16, 23) having a plurality of nozzle holes (16a, 26). A steam outlet side conduit (c2) is provided with an opening/closing valve (55) and a trap conduit (57) is branched from a conduit at an upstream side from the opening/closing valve (55). By opening the opening/closing valve (55), a rapid temperature rise of the nozzle holder (11) can be enabled at a time of starting a production of a nonwoven fabric.

Abstract: A carbonic water production apparatus equipped with a carbonic acid gas dissolving apparatus 3 and a circulation pump 1 wherein water in a bath 11 is circulated by the circulation pump 1, and a carbonic acid gas is fed into the carbonic acid gas dissolving apparatus 3 to dissolve the carbonic acid gas in the water, and wherein the circulation pump 1 is a positive-displacement metering pump having a self-priming ability; a carbonic water production method using this apparatus; a carbonic water production method comprising an early step for producing a carbonic water and a concentration maintaining step for the carbonic water; a carbonic water production apparatus equipped with a control for controlling the feeding pressure of carbonic water gas so that give an intended concentration of carbonic acid gas; a carbonic water production apparatus which automatically discharges out a drain; and a carbonic water production apparatus combined with a portable foot bath.

Abstract: A carbonic water production apparatus equipped with a carbonic acid gas dissolving apparatus 3 and a circulation pump 1 wherein water in a bath 11 is circulated by the circulation pump 1, and a carbonic acid gas is fed into the carbonic acid gas dissolving apparatus 3 to dissolve the carbonic acid gas in the water, and wherein the circulation pump 1 is a positive-displacement metering pump having a self-priming ability; a carbonic water production method using this apparatus; a carbonic water production method comprising an early step for producing a carbonic water and a concentration maintaining step for the carbonic water; a carbonic water production apparatus equipped with a control for controlling the feeding pressure of carbonic water gas so that give an intended concentration of carbonic acid gas; a carbonic water production apparatus which automatically discharges out a drain; and a carbonic water production apparatus combined with a portable foot bath.

Abstract: A carbonic water production apparatus equipped with a carbonic acid gas dissolving apparatus 3 and a circulation pump 1 wherein water in a bath 11 is circulated by the circulation pump 1, and a carbonic acid gas is fed into the carbonic acid gas dissolving apparatus 3 to dissolve the carbonic acid gas in the water, and wherein the circulation pump 1 is a positive-displacement metering pump having a self-priming ability; a carbonic water production method using this apparatus; a carbonic water production method comprising an early step for producing a carbonic water and a concentration maintaining step for the carbonic water; a carbonic water production apparatus equipped with a control for controlling the feeding pressure of carbonic water gas so that give an intended concentration of carbonic acid gas; a carbonic water production apparatus which automatically discharges out a drain; and a carbonic water production apparatus combined with a portable foot bath.

Abstract: An object of the present invention is to provide a composite porous membrane, which has not only excellent filtration capacity, but also excellent adhesion between a porous membrane and a braid and mechanical properties, and a method for producing the composite porous membrane. The present invention relates to a composite porous membrane comprising a braid, and a membrane material; wherein the membrane material comprises a first porous layer comprising a dense layer which is arranged on the outer surface of the braid, and a second porous layer comprising a dense layer which is arranged on the first porous layer, and a method for producing the composite porous membrane.

Abstract: A hydrophilizing agent for a hydrophobic porous membrane, wherein the agent contains a surfactant, and the surfactant has a frothability such that the bubble height immediately after frothing, as measured according to the Ross-Miles method (JIS K 3362), using a 0.1 wt % aqueous solution of the surfactant at 25° C., is 40 mm or less, and preferably has a frothability such that the bubble height five minutes after frothing is 20 mm or less; a method for hydrophilizing a hydrophobic porous membrane using this hydrophilizing agent; and a method for testing and hydrophilizing a membrane module using this hydrophilizing agent.

Abstract: A carbonate spring producing system includes a gas-liquid separator (6) which is connected on the downstream side of a carbonic acid gas dissolver (4). A carbonic acid gas supply means (10) and hot water supply means are connected to the carbonic acid gas dissolver (4). A liquid lead-out pipe (5) is connected to the gas-liquid separator. Preferably an un-dissolved carbonic acid gas lead-out pipe (23) is connected on the upstream sides of the gas-liquid separator (6) and the carbonic acid gas dissolver (4). The un-dissolved carbonic acid gas lead-out pipe (23) includes a control valve (25), a compressor (27), and a liquid level detection means (22). The control valve (25) controls a flow rate of un-dissolved carbonic acid gas from the gas-liquid separator. The liquid level detection means (22) measures a liquid level of the gas-liquid separator.

Abstract: This invention concerns an apparatus and a method for producing carbonated water capable of obtaining high concentration carbonated water effectively. Carbon dioxide gas is passed through a first carbon dioxide gas dissolver (7) composed of a membrane module to be dissolved in water and the carbonated water passing through the first carbon dioxide gas dissolver (7) is passed through a static mixer (13), which is a second carbon dioxide gas dissolver. Consequently, a high concentration carbonated water can be obtained remarkably, effectively and easily with a simpler structure than conventionally.