Abstract: To provide a steel pipe pile capable of ensuring pile bearing capacity without disturbing the surrounding ground during installation.

Abstract: Provided is a method for synthesizing liquid hydrocarbon compounds wherein synthesizing liquid hydrocarbon compounds from a synthesis gas by a Fisher-Tropsch synthesis reaction. The method includes a first absorption step of absorbing a carbon dioxide gas, which is contained in gaseous by-products generated in the Fisher-Tropsch synthesis reaction, with an absorbent, and a second absorption step of absorbing a carbon dioxide gas, which is contained in the synthesis gas, with the absorbent which is passed through the first absorption step.

Abstract: The present invention discovers a new structural design technique which provides clearances between refractories 13 and fills the clearances with various types of refractories or refractory materials like in the past and, furthermore, uses another method to secure the heat expansion absorption function and provides a hearth structure of a rotary furnace hearth 1 able to prevent contact between the hearth structure and furnace side walls 3 and 4 caused by heat expansion of the refractories 13 and realize safe and smooth operation, that is, a hearth structure of a rotary furnace hearth laying two or more layers of refractories between side blocks 9 and 10 built at the inner circumferential end and outer circumferential end of a hearth refractory bed 7 of a rotary furnace hearth 1 and laying a powder or pellet hearth material 16 on its top surface, the hearth structure of a rotary furnace hearth 1 characterized by using refractories having a compressive strength of 0.1 to 5 MPa at 800 to 1500° C.

Abstract: According to an exemplary embodiment, a bubble column-type slurry bed Fischer-Tropsch synthesis reaction process can be provided, in which synthesis gas supplied continuously from the bottom of a reactor contacts suspended catalyst particles to form liquid hydrocarbons, gaseous hydrocarbons and water. Additionally, a slurry of suspended liquid products and catalyst particles can move from the reactor to the lower portion of a separation vessel to separate the catalyst particles and gaseous products. Further, a process can be provided in which the liquid products formed are sent to the separation vessel a process in which liquid products can be derived. Additionally, a process can be provided in which a slurry in which catalyst particles are concentrated is derived from the bottom of the separation vessel and circulated to the bottom of the reactor, are driven by the driving force of synthesis gas without using an external drive power source.

Abstract: A rotary furnace hearth wherein a hearth carriage carrying a hearth comprises a plurality of hearth carriages respectively having propulsion systems, wherein adjoining hearth carriages are coupled by coupling bolts and nuts via spacers interspaced in a single row in a horizontal plane, whereby even if the hearth carriages deform due to heat at the time of operation, they are structured to be able to freely deform without mutual constraint in the event of curved deformation, so the hearth carriages are maintained in individually stable states at all times.

Abstract: A magnetic shield structure having openings, the structure comprising a plurality of similar magnetic blind bodies 2, each blind body 2 having an imaginary blind core plane F and a plurality of magnetic material slats 1 being spaced from each other by a distance d required for magnetic shielding, each slat 1 intersecting the blind core plane F at a longitudinal central axis C thereof, the longitudinal central axes of the slats are oriented substantially in parallel to each other on the blind core plane F. The blind bodies 2a, 2b are coupled in a row by serially coupling each slat 1 in each blind body 2a to a corresponding slat 1 of adjacent blind body 2b through overlapping or abutting of slat terminal portions, whereby the blind core planes Fa, Fb of the blind bodies 2a, 2b are so coupled as to define a successive magnetic shield plane, and spaces d between adjacent slats 1 in each blind body 2a, 2b form openings in the magnetic shield structure.

Abstract: In a so-called GTL process for producing liquid hydrocarbons containing fuel oil by producing synthesis gas from natural gas, subsequently producing Fischer-Tropsch oil from the obtained synthesis gas by way of Fischer-Tropsch synthesis and upgrading the produced Fischer-Tropsch oil, the synthesis gas produced from a synthesis gas production step is partly branched at a stage prior to getting to a Fischer-Tropsch oil production step and high-purity hydrogen is separated and produced from the synthesis gas entering the branch line. All the separated high-purity hydrogen is supplied to an upgrading reaction step and consumed as hydrogen for an upgrading reaction. Additionally, the synthesis gas entering the branch line is subjected to a water gas shift reaction to raise the hydrogen concentration before the step of separating and producing high-purity hydrogen and the residual gas left after the separation may be circulated to the synthesis gas production step as raw material for producing synthesis gas.

Abstract: In a so-called GTL process of producing synthesis gas from natural gas, producing Fischer-Tropsch oil by way of Fischer-Tropsch synthesis of the obtained synthesis gas and producing liquid hydrocarbons containing fuel oil by upgrading, the synthesis gas produced from the synthesis gas production step is partly branched off prior to getting to the Fischer-Tropsch oil production step and the synthesis gas entering the branch line is subjected to a water gas shift reaction to raise the hydrogen concentration thereof. Subsequently, high-purity hydrogen is isolated from the synthesis gas and the residual gas left after the isolation is circulated to the synthesis gas production step and used as raw material for synthesis gas production. As a result, a significant improvement can be achieved in terms of raw material consumption per product of the entire process.

Abstract: The oxide film thickness of the steel material surface (dH2O+do2) is made to become 15 nm or less where post-treatment after water-cooling is not needed by suitably setting the conditions of the water-cooling start temperature (Ti), water-cooling end temperature (To), steel material thickness (d), concentration of solute oxygen in the cooling water (Do), and cooling rate (CR) in the equation of dH2O+do2=7.98×10?4(Ti?To)dDo+{5.50×10?3(Ti2?To2)?6.51(Ti?To)}/CR.

Abstract: A computer which functions by a performance prediction program for a ground source heat pump system of the present invention and a performance prediction system constructed thereby include a dimensionless distance calculating means, a first dimensionless time calculating means, a second dimensionless time calculating means, a boundary time acquiring means, an underground temperature change calculating means, and a tube surface temperature change calculating means. The performance prediction program and performance prediction system can be applied to the design of heat exchange system by obtaining predicted underground temperature data for the ground source heat pump system with high accuracy and predicting the performance for the ground source heat pump system based on the resulting underground temperature changes, etc., in view of the use of a plurality of buried tubes, underground temperature change patterns for buried tubes placed at different intervals, and the use of U-shaped tube heat exchangers.

Abstract: In a GTL process of producing various kinds of hydrocarbon oils from natural gas, provided is improved heat efficiency in the case of using a steam reforming process or a carbon dioxide reforming process in the reforming. The process includes producing a synthesis gas by converting the natural gas and at least one of steam and carbon dioxide into a synthesis gas through a tubular reformer filled with a reforming catalyst, producing Fischer-Tropsch oil by subjecting the produced synthesis gas to a Fischer-Tropsch reaction, and upgrading in which the Fischer-Tropsch oil is subjected to hydrotreatment and distillation to produce various kinds of hydrocarbon oils, in which excess heat generated in the synthesis gas production is recovered, and the recovered heat is used as heat for at least one of hydrotreatment and distillation in the upgrading.

Abstract: A reduced iron discharging screw conveyer is provided in a rotary hearth furnace and discharges reduced iron out of the rotary hearth furnace. The rotary hearth furnace produces the reduced iron by charging and heating a pellet including metallic oxide and coal material onto a rotary hearth rotating in a horizontal plane. The reduced iron discharging screw conveyer has a rotary shaft and a screw blade which is spirally formed on an outer surface of the rotary shaft. A lead angle ? of the screw blade 5a satisfies a condition of “0.46 rad ???0.79 rad”. A ratio (h/D) between height h of the screw blade and an outer diameter D of the screw conveyer is smaller than 0.2, and a ratio (t/h) between thickness t and height h of the screw blade is larger than or equal to 0.12.

Abstract: A bubble column-type slurry bed reaction system is provided in which an operating system, which synthesizes liquid hydrocarbons by the Fischer-Tropsch (FT) synthesis reaction and separates and derives a catalyst and liquid hydrocarbon products from a slurry composed of gas, liquid and solid phases, can be simplified, and deterioration of catalyst particles caused by attrition and so forth can be reduced.

Abstract: A rotary furnace hearth wherein a hearth carriage carrying a hearth comprises a plurality of hearth carriages respectively having propulsion systems, wherein adjoining hearth carriages are coupled by coupling bolts and nuts via spacers interspaced in a single row in a horizontal plane, whereby even if the hearth carriages deform due to heat at the time of operation, they are structured to be able to freely deform without mutual constraint in the event of curved deformation, so the hearth carriages are maintained in individually stable states at all times.

Abstract: The sliding-type laminated plate bearing is provided with a laminated portion at which a plurality of hard rigid members and a plurality of soft elastic members are laminated alternately in a state of being wholly or partially non-adhesive, a first smooth member of which the surface is made smooth and which is in contact at least with either end face of the laminated portion in the laminated direction, and a second smooth member which is in contact with the first smooth member and which is installed so as to be slidable with respect to the first smooth member.