Abstract:
The safety valve vibration analyzer (100) includes: a set condition input unit (108) in which set conditions of a physical model including a safety valve and an upstream pipe connected to the safety valve are inputted; a safety valve governing equation holder (110) that holds a safety valve governing equations; a pipe governing equation holder (112) that holds a pipe governing equation; a processing unit (116) that derives a time variation of a valve lift by using the set conditions inputted, the safety valve governing equations, and the pipe governing equations; and a valve lifting force function holder (114) that holds a valve lifting force function. The processing unit (116) derives the time variation of the valve lift by applying the valve lifting force function to the equation of motion of the valve disc.
Abstract:
A supporting structure that supports a heat exchanger having a saddle is provided. The supporting structure includes a first supporting structure (11) for supporting the saddle (104) along one end thereof and a second supporting structure (12) for supporting the saddle along another end thereof. The first supporting structure (11) and the second supporting structure (12) are situated spaced apart from each other by at least a distance enabling passage of a transporter (200) for transporting the heat exchanger (100).
Abstract:
In a system for dehydrating carbon dioxide gas, the carbon dioxide gas is cooled by using a turbo expander (21), and the power extracted by the turbo expander from the carbon dioxide gas is used in the system for compressing the carbon dioxide gas. The cooled carbon dioxide gas is fed to a knock-out drum (22) to remove free water therefrom. The carbon dioxide gas from the separator is introduced to a secondary dehydration unit (11) and recompressed to the required pressure for carbon storage or for EOR operation.
Abstract:
A carrier for deposition of microorganisms, comprising a web W1 comprising a first fiber of a polyolefin resin and a second fiber of a polyolefin resin having a melting temperature below that of the first fiber, and a nonwoven fabric f1 as a base layer, wherein the web W1 is adhered to the nonwoven fabric f1 by means of needle punching and the first fiber and the second fiber are mutually bound by taking advantage of melting of the second fiber with the first fiber bound to the nonwoven fabric f1. According to this carrier, the separation of the first fiber contributing to the deposition of microorganisms can be prevented, and at the same time gathering of the web by means of needle punching can be prevented with the aid of the nonwoven fabric f1, eliminating a variation in weight.
Abstract:
An AC/AC converter includes first to sixth AC switches. A series of the first and second AC switches and a series of the third and fourth switches are connected in parallel with each other between both ends of an AC input. One end of the primary winding of a transformer is connected to the node of the first and second AC switches and the other end to the node of the fourth and third AC switches. One end of the secondary winding of the transformer is connected to one end of the fifth AC switch and the other end one end of the sixth AC switch. The other ends of the fifth and sixth AC switches are connected to one of the output terminals and the mid point of the secondary winding to the other. The AC/AC converter further includes a control means which alternately operates a group of the first, third, and fifth AC switches and a group of the second, fourth, and sixth AC switches at a frequency higher than that of the input. The AC input repeatedly and alternately flows through the primary winding of the transformer in different directions at a frequency which is sufficiently higher than that of the AC input. Namely, the AC input is converted into an AC of a higher frequency. An arbitrary voltage proportional to the turn ratio of the transformer appears on the secondary side of the transformer at the higher frequency. On the secondary side, the direction of the AC is again controlled by means of the secondary-side AC switches which operate synchronously with the primary-side AC switches and the waveform of the AC closely resembles or is similar to the original waveform. Since a high frequency is impressed upon the transformer, the size of the transformer is reduced and the efficiency of the transformer is improved.
Abstract:
The specification discloses a gas dispersion pipe in which a gas is introduced via an upper and thereinto, which is ejected via a lower end into a liquid to carry out a gas-liquid contact operation, and gas-liquid contact method and apparatus using this pipe. The gas dispersion pipe is formed so that an upper end portion thereof has a convergent pipe structure having a downwardly decreasing horizontal cross-sectional area, and/or so that a lower end portion has a nozzle structure having a downwardly decreasing horizontal cross-sectional area. This gas dispersion pipe may be provided therein with a gas guide member, the horizontal cross-sectional area of which increases downward, instead of forming the lower end portion thereof to a nozzle structure.
Abstract:
A wastewater treatment system (10) for a Floating Production, Storage and Off-loading system (FPSO) has a liquid receiver (26) provided under at least one of first devices (13), a temporary storage tank (47) connected to the liquid receiver via a conduit to temporarily store the liquid collected in the liquid receiver, a drain conduit (52) connected to the temporary storage tank and provided with a first valve (55) for draining the liquid stored in the temporary storage tank to the sea, and a contaminated water storage tank (58) connected to the temporary storage tank via a conduit provided with a second valve (57).
Abstract:
Provided is a floating structure that is capable of supplying a hydrocarbon gas to an LNG tank during a maintenance work for the LNG tank by utilizing essential facility for LNG production. A floating structure (1) having a dehydration system (11), a liquefaction system (3), an LNG tank (4), a BOG compressor (66), a first line (101) for connecting a downstream portion of the dehydration system with the LNG tank to supply the natural gas from which moisture has been removed to the LNG tank, and a second line (102) connecting the BOG compressor with the LNG tank to supply the compressed BOG to the LNG tank.
Abstract:
Apparatus for compressing gaseous refrigerant for use in a refrigeration circuit of a liquefaction plant comprises a refrigeration circuit (1) and two compressors (10, 20) that are functionally connected to the refrigeration circuit. One of the compressors is provided with a double suction configuration, and the outlets and the inlets of the first and second compressors are connected at least partly in a mutually parallel flow configuration such that the refrigerant flow that leaves the refrigeration circuit from a plurality of outlets thereof is distributed between the two compressors before joining at the inlet of the refrigeration circuit.
Abstract:
An iodide compound is adsorbed and removed from an organic acid containing the iodide compound as an impurity by passing the organic acid through a packed bed of a cation-exchange resin having silver ion carried thereon at 50 C or lower. The cation-exchange resin is a macroporous-type resin with an average particle size of 0.3 to 0.6 mm and an average pore size of 15 to 28 nm, and silver ion substitutes for 40 to 60% of the active site.