Abstract: To provide an air separation unit capable of reducing the risk of combustion of a heat exchanger connected to an oxygen turbine. An air separation unit A1 including a main heat exchanger 1; an intermediate-pressure rectification column 2; a low-pressure rectification column 4; a crude-argon column 5; a nitrogen condenser 3; a crude-argon condenser 6; an oxygen turbine 9; an oxygen turbine inlet pipe L32 for feeding oxygen gas drawn out from a bottom section of the low-pressure rectification column 4 or a gas phase in a refrigerant storage section of the nitrogen condenser 3 into the oxygen turbine 9 via the main heat exchanger 1, and feeding the oxygen gas to the main heat exchanger 1 again; an oxygen bypass pipe L321 which branches from the oxygen turbine inlet pipe L32; and a dilution stream pipe L42 for drawing out a nitrogen-containing gas.

Abstract: A nitrogen generating device comprises: a main heat exchanger; a nitrogen distillation column; at least one nitrogen condenser; a compressor; an expansion turbine; a rotation control unit for controlling rotation with respect to a rotating shaft connecting the compressor and the expansion turbine; a pressure measuring unit for measuring a pressure value of product nitrogen gas; and an optimum rotational speed calculation command unit which inputs the pressure value measured by the pressure measuring unit into a pre-installed rotational speed calculation function to calculate the rotational speed of the rotating shaft, and issues a command to the rotation control unit.

Abstract: An apparatus for producing high-purity oxygen includes a heat exchanger for cooling feed air, a first rectification column, and a second rectification column. The first column reduces high-boiling-point impurities from the cooled air to produce an oxygen-containing liquid from a discharge portion. This liquid is then transferred to the second column, which reduces low-boiling-point impurities to yield the final high-purity oxygen product. A dedicated piping system connects the columns and features a branch. First piping, controlled by a first valve, directs the oxygen-containing liquid to the second column to regulate its flow rate. Second piping, controlled by a second valve, branches from the first. This arrangement allows for diversion of the liquid, enabling precise control over the properties of the feed to the second column. This control scheme ensures consistent product quality without reliance on expensive, real-time analytical instruments.

Abstract: An oxygen liquefaction apparatus may include a heat exchanger that allows oxygen gas to be cooled and condensed with liquid nitrogen. The oxygen liquefaction apparatus may include: a differential pressure gauge that measures the difference in pressure between the hot and cold ends of an oxygen flow path; and an oxygen control unit that calculates the level of oxygen inside the heat exchanger based on the differential pressure gauge reading, that controls an oxygen control valve to adjust the level, and that controls the heat transfer area to control the condensation of the oxygen.

Abstract: Provided is a method of manufacturing a glass roll (GR), including: a conveying step of conveying a band-shaped glass film (G2) in a lateral conveying direction by a conveying device (4); and a roll-up step of rolling up the glass film (G2) into a roll shape. The conveying step includes an inspection step of measuring a state of each of end portions (Gd, Ge) in a width direction of the glass film (G2) by a detection unit (19a, 19b) under a state in which a tension is applied to the glass film (G2) that passes through an intermediate conveying region (MS) of the conveying device (4) by a tension applying portion.

Abstract: A nitrogen generating method for producing product nitrogen using a nitrogen generating device comprising a main heat exchanger for cooling feed air, a nitrogen rectification column into which the feed air cooled in the main heat exchanger is introduced, and a nitrogen condenser which condenses a vapour stream fed from the nitrogen rectification column and circulates the same to the nitrogen rectification column, the method including a control step for discharging liquid nitrogen condensed by the nitrogen condenser and stored in a liquid nitrogen buffer, which is provided in an upper gas phase portion of the nitrogen rectification column or separately from the nitrogen rectification column, to a rectification portion of the nitrogen rectification column in response to an increase in an amount of product nitrogen or an increase in a flow rate of the feed air.

Abstract: An air separation unit comprises a first rectification column, having a top condenser and a second rectification column placed side by side, a heat exchanger, a first pump and a second pump connected in parallel, the first pump being capable of producing liquid at a first liquid pressure and the second pump being capable of producing liquid at a second liquid pressure, higher than the first pressure, each pump having an inlet connected to the second column, a first outlet of the first pump being connected to a first outlet conduit, a second outlet of the second pump being connected to a second outlet conduit, the first and second outlet conduits being connected to the condenser section

Abstract: A nitrogen generating device comprises: a main heat exchanger; a nitrogen distillation column; at least one nitrogen condenser; a compressor; an expansion turbine; a rotation control unit for controlling rotation with respect to a rotating shaft connecting the compressor and the expansion turbine; a pressure measuring unit for measuring a pressure value of product nitrogen gas; and an optimum rotational speed calculation command unit which inputs the pressure value measured by the pressure measuring unit into a pre-installed rotational speed calculation function to calculate the rotational speed of the rotating shaft, and issues a command to the rotation control unit.

Abstract: Provided is a method of manufacturing a glass roll (GR), including: a conveying step of conveying a band-shaped glass film (G2) in a lateral conveying direction by a conveying device (4); and a roll-up step of rolling up the glass film (G2) into a roll shape. The conveying step includes an inspection step of measuring a state of each of end portions (Gd, Ge) in a width direction of the glass film (G2) by a detection unit (19a, 19b) under a state in which a tension is applied to the glass film (G2) that passes through an intermediate conveying region (MS) of the conveying device (4) by a tension applying portion.

Abstract: A nitrogen production system that can produce high purity nitrogen containing a desired concentration of oxygen and ultrahigh purity nitrogen containing a desired concentration of argon in a single rectifying column while restraining increase in electric power consumption and a production process thereof are provided. The method can include the steps of rectifying a cooled and compressed air stream in the rectifying column; withdrawing the ultrahigh purity nitrogen stream from a top portion of the nitrogen rectifying column, warming the ultrahigh purity nitrogen stream in a heat exchanger, and then recovering the ultrahigh purity nitrogen stream from the heat exchanger; and withdrawing a high purity nitrogen stream from a rectification section of the nitrogen rectifying column, warming the high purity nitrogen stream in the heat exchanger, and then recovering the high purity nitrogen stream from the heat exchanger.

Abstract: A glass roll includes a glass film formed by a downdraw method. The glass film is wound into a roll using a winding roller in a state in which front and back glass surfaces of the glass film formed in the forming operation are exposed, and during the winding operation, the glass film is superposed on a separable protective sheet. The protective sheet extends beyond both sides in a width direction of the glass film. The protective sheet can further be wound on an outer peripheral surface of the glass film by winding only the protective sheet from a trailing end of the glass film in a winding direction of the glass film.

Abstract: An LNG production system including a boil off gas recondenser that can recondense boil off gas without using a BOG compressor and without depending on an LNG liquefaction process is provided.

Abstract: A machining simulation device includes a cutting condition extraction unit, a tool type determine unit, a load calculation unit configured to calculate a spindle load, a load determination unit configured to determine whether the calculated spindle load is within a predetermined maximum load, an adjustment amount calculation unit configured to calculate an adjustment amount of the cutting condition when the calculated spindle load is determined not to be within the predetermined maximum load, and a display unit configured to display a result of the determination.

Abstract: An apparatus for producing a liquefied gas using a Rankine cycle is provided. The apparatus includes a first compression means for adiabatically compressing a heat transfer medium; a first heat exchanger for constant pressure heating the adiabatically compressed heat transfer medium; a plurality of parallelly arranged expansion means for adiabatically expanding the heated heat transfer medium; a second heat exchanger for constant pressure cooling the adiabatically expanded heat transfer medium; and a flow passageway for guiding the heat transfer medium that has been guided out from the second heat exchanger to the first compression means.

Abstract: A nitrogen production system that can produce high purity nitrogen containing a desired concentration of oxygen and ultrahigh purity nitrogen containing a desired concentration of argon in a single rectifying column while restraining increase in electric power consumption, and a production process thereof are provided.

Abstract: A glass roll reliably prevents a glass film from breaking from an end surface of the glass film as an origin of breakage. The glass roll is formed by winding the glass film into a roll while superposing the glass film on a protective sheet. The glass film is formed by an overflow downdraw method to have a thickness of 1 ?m or more and 200 ?m or less, and has each end surface in a width direction formed as a cut surface cut by laser splitting.

Abstract: A machine tool controlled by a numerical controller is provided with an additional-axis composed of a tilting table and a rotary table. The controller displays, in a display section thereof, a diagram representative of an actual state in which an additional shaft is mounted so that an operator can select how to mount the additional shaft on the machine tool and collectively set parameters based on the selection.

Abstract: A machine tool for deburring a burred workpiece obtains shape data on the workpiece by capturing an image of the workpiece by means of a visual sensor and compares shape data on the workpiece with previously stored shape data on a deburred workpiece, thereby calculating burr data including the width, depth and position of a burr. A machining path for deburring the workpiece is generated based on the calculated burr data.

Abstract: A machining simulation device includes a cutting condition extraction unit, a tool type determine unit, a load calculation unit configured to calculate a spindle load, a load determination unit configured to determine whether the calculated spindle load is within a predetermined maximum load, an adjustment amount calculation unit configured to calculate an adjustment amount of the cutting condition when the calculated spindle load is determined not to be within the predetermined maximum load, and a display unit configured to display a result of the determination.

Abstract: A machine tool controlled by a numerical controller is provided with an additional-axis composed of a tilting table and a rotary table. The controller displays, in a display section thereof, a diagram representative of an actual state in which an additional shaft is mounted so that an operator can select how to mount the additional shaft on the machine tool and collectively set parameters based on the selection.