1790 results about "Liquid gas" patented technology

The invention provides an anchoring structure, a film system and a liquefied gas storage tank. The anchoring structure comprises a stud, a nut and a secondary layer anchoring plate. The film system comprises a main layer film, a main plywood, a secondary layer film and a secondary plywood. The secondary layer anchoring plate is connected to the upper portion of the secondary plywood, the secondary layer thin film is connected to the upper portion of the secondary layer anchoring plate, the first pressing plate arranged on the stud is pressed on the upper portion of the secondary layer thin film, the main plywood is arranged on the upper portion of the secondary layer thin film, the second pressing plate arranged on the stud is pressed on the upper portion of the main plywood, and the main layer thin film is arranged on the upper portion of the main plywood. And the nut is pressed above the main layer film, so that the film system is connected and fixed through the anchoring structure, and the connection strength of each layer in the film system is ensured. The area of the first pressing plate is larger than that of the first through hole, the area of the second pressing plate is larger than that of the second through hole, and the contact area of the nut and the main layer film is larger than that of the third through hole, so that the leakproofness of the film system is improved, and liquefied gas in the storage tank is prevented from leaking.

The invention relates to the field of low-temperature liquefied gas storage equipment, and discloses a low-temperature liquefied gas film storage tank and an installation method thereof.The low-temperature liquefied gas film storage tank comprises an outer tank and a plurality of insulation box structures installed on the outer tank; the insulation box structure comprises a secondary insulation box, a secondary shielding layer, a main plywood and a main shielding layer which are arranged in sequence, and the corrugation position of the main shielding layer corresponds to the corrugation position of a corrugated plate in the secondary shielding layer; a gap is formed between every two adjacent insulation box structures, a secondary layer connecting plate is connected between every two adjacent secondary shielding layers, a main layer connecting plate is connected between every two adjacent main shielding layers, and the secondary layer connecting plates and the main layer connecting plates are located above the gaps. The gap between the adjacent insulation box structures can be effectively processed, and the integrity and the sealing performance of the shielding layer are improved.

The invention discloses a new energy system for efficient ventilation, cooling and comprehensive utilization of a heat damage mine, and relates to the technical field of ventilation and cooling of the heat damage mine, the new energy system comprises a liquid air energy storage power station, a liquid air conveying pipeline system arranged in a liquid air conveying stratum drill hole, and an underground liquid air storage and conveying system arranged in an underground chamber of a mine area; the liquid air conveying pipeline system is used for connecting the liquid air energy storage power station and the underground liquid air storage conveying system; the underground liquid air storage and conveying system comprises an underground liquid air storage station and an underground liquid air conveying system; the underground liquid air storage station is used for storing liquid air; and the tail end of the underground liquid air conveying system is communicated with the underground mining area and is used for ventilating, cooling and comprehensively utilizing energy for the underground mining area. The efficiency of a traditional ventilation and cooling process is improved, the means of using liquid gas for industrial production underground is added, the energy consumption cost of mine production is greatly reduced, and the effects of energy storage and efficiency improvement can be provided for a ground power supply system.

The invention belongs to the technical field of low-temperature liquid cargo storage, and particularly relates to an enclosure structure and an enclosure system at a dome corner area of a low-temperature liquefied gas storage tank, and the enclosure structure is arranged at the junction of a dome in the low-temperature liquefied gas storage tank, the top surface of a cabin and a front / rear bulkhead; comprising a corner insulation box connected to a corner, and a plane insulation box connected to a wall surface in the extension direction of the two ends; the corner area secondary-layer steel plate is attached to the inner side of the corner of the corner insulation box, and the corner area main-layer steel plate is welded to the inner side of the corner of the corner area secondary-layer steel plate through the connecting plate. The secondary shielding layer is attached to the surface of the insulation box and is welded with the corner area secondary layer steel plate; the main shielding layer is arranged on the inner side of the secondary shielding layer and is welded with the corner area main layer steel plate; and a supporting fixing plate is arranged between the two. Compared with the prior art, the problems that when an existing enclosure system structure is applied to the dome, stress is large, deformation is large, and structural stability is poor are solved. According to the scheme, the sealing performance and the use reliability of the low-temperature liquefied gas storage tank at the dome corner area are guaranteed.

The liquefied gas bottle intelligent management terminal comprises an intelligent hand wheel assembly and an angle valve, a shell of the intelligent hand wheel assembly is made of high-temperature-resistant fireproof plastic, a bottom groove of the intelligent hand wheel assembly is matched with a valve element screw of the angle valve and locked through a fixing nut, and a positioning module and a rotation direction sensor are embedded in an upper cover. A battery compartment, a circuit board and an information storage chip are arranged in the shell, and a touch switch is arranged on the outer wall of the shell; the positioning module adopts a multi-band base station positioning chip, and the rotation direction sensor is an integrated sensor of a three-axis gyroscope and an accelerometer; the terminal can collect information such as the position of a gas cylinder and the opening and closing state of an angle valve, and the information is encrypted and uploaded to the cloud server through the wireless communication module. According to the system, the position and the opening and closing state of the gas cylinder can be monitored in real time by integrating the positioning module, the sensing module and the like, the safety of filling information is guaranteed by utilizing a block chain, intelligent early warning of abnormity and cloud analysis of data can be realized, a report can be generated to assist management, and the safety and efficiency of liquefied gas cylinder management are improved.

The invention provides a corrugated plate and a liquefied gas storage container with the same. The corrugated plate comprises a plate body, orthogonal first corrugations, orthogonal second corrugations and an intersection structure formed at the intersection position. The first corrugations are higher than the second corrugations. The intersection structure includes a top portion, a ridge, and a pit portion. The protruding height of the top is larger than that of the first corrugations. A ridge is formed in each of four quadrants formed by the corrugations orthogonally, the ridge extends from the top towards the plate body, and the overall extension direction intersects the first corrugation, the second corrugation and the height direction, respectively. There are four pit portions, each of which is located in one quadrant, is formed on an outer side surface of the first corrugation and sandwiched between a first crest and a ridge of the first corrugation, and is recessed inward with respect to the outer side surface of the first corrugation. According to the invention, the intersection structure can enable the upper surface and the lower surface of the intersection position to have uniform line length, so that uniform thickness is realized, excessive thinning is avoided, and better structural strength and anti-fatigue characteristic are realized.

The invention relates to a pump tower structure and a liquefied gas storage container, and relates to the technical field of liquefied gas storage tanks. The pump tower structure penetrates through the top wall of the outer tank body to communicate inside and outside the outer tank body. The pump tower structure comprises a pump liquid pipe, a buffer pipe and a fixed disc. The lower end of the liquid pumping pipe penetrates through the top wall of the outer tank body into the outer tank body. The buffer pipe is arranged outside the pump liquid pipe in a sleeving mode, and a buffer space is formed between the buffer pipe and the pump liquid pipe. The fixing disc is arranged at the upper end of the buffer pipe and protrudes out of the upper end of the buffer pipe in the radial direction. Wherein the end portions of the pump liquid pipe are directly or indirectly fixed to the top wall and the bottom wall of the outer tank body respectively, a clamping block is arranged on the top wall of the outer tank body, and the clamping block is connected with the fixing disc in a clamped mode and limits the fixing disc to move in the vertical direction. The pump tower structure can solve the problem that in the prior art, a pump tower is prone to damage when being impacted by liquid materials in a storage tank.

The invention discloses a caving zone filling method based on solid-liquid-gas three-waste synergistic mineralization, and relates to the technical field of mine filling. Comprising the following steps that goaf grouting filling parameters are determined through a multi-source data fusion analysis method; the filling material is prepared by taking mining area solid wastes, mining area liquid wastes and gas wastes as basic materials; filling materials are injected into the residual space of the caving zone of the goaf of the underground working face through a ground grouting filling system, the loose gangue structure in the goaf is cemented, and a filling body is formed; the method realizes the utilization of solid-liquid-gas three wastes in the mine, achieves the purposes of reducing ground surface settlement, protecting water resources and the like, and accords with the low-carbon and high-efficiency mineral development concept.

The present invention relates to a liquefied gas storage facility comprising: a load support structure having a bottom wall and a vertical load support wall, the vertical load support wall being composed of N vertical load support panels; and a can comprising a bottom wall and a vertical wall, the bottom wall comprising a plurality of angular sectors, the corrugated sealing membrane of each angular sector having a first corrugation, the corrugated sealing membrane of each angular sector comprising a plurality of metal plates arranged to form a loop portion, the loop portion comprises a set of complete metal sheets in which the total number of first corrugations present on the loop portion increases in the direction of the vertical wall, said total number increasing only per M consecutive loop portions, where M is a natural integer greater than or equal to 2.

The present invention discloses a method, device and application for producing aviation kerosene from methanol, and belongs to the field of petrochemical product processing technology. The method comprises: generating a methanol dehydration reaction product from a methanol raw material under the catalytic action of a first molecular sieve catalyst, separating and treating the methanol dehydration reaction product, and then mixing it with one or more of recycled fuel gas, recycled liquefied gas or recycled gasoline under the catalytic action of a second molecular sieve catalyst to generate a reaction oil gas, the reaction oil gas is fractionated to obtain a kerosene fraction, and the kerosene fraction is subjected to a hydrogenation and refining treatment to obtain aviation kerosene. The method for producing aviation kerosene using methanol as a raw material provided by the present invention has opened up a new way to produce aviation kerosene; the process flow is short and compact, and can effectively achieve energy conservation and emission reduction.

A comminuting machine for comminuting a product includes: a cutting device for comminuting the product, which device has at least two cutting units; a drive shaft for driving the cutting units; and a housing in which the cutting units are arranged one behind the other along the longitudinal axis of the drive shaft. The comminuting machine is designed to feed a fluid in the form of a liquid gas into at least one intermediate space which is formed in the housing between two cutting units that are adjacent to one another along the longitudinal axis of the drive shaft.

The invention relates to a method for producing high-octane gasoline through hydrocarbon catalytic cracking and a reaction system thereof, and the method comprises the following steps: in a constant linear velocity fluidized bed reactor, diesel oil and other light petroleum hydrocarbons are contacted with a high silica-alumina ratio catalytic cracking catalyst, and self-heat balance is maintained through regeneration flue gas circulation to produce liquefied gas and high-octane gasoline. According to the method disclosed by the invention, heavy oil such as naphtha, wax oil and residual oil can be processed while light hydrocarbon such as diesel oil is processed, the conversion rate of the diesel oil is high, self-heating balance can be realized, the problem of excessive diesel oil production capacity of a refinery plant is solved, and the processing benefit of crude oil is also improved.

The utility model relates to the technical field of oil fume suction equipment, and provides a cleaning assembly and a range hood, and the cleaning assembly comprises a liquid storage part, a cleaning liquid container and an output pump. Wherein the liquid storage part is provided with an inlet end, a liquid outlet end and an air outlet end, and is arranged in the range hood; the cleaning liquid container is communicated with the inlet end and is suitable for providing cleaning liquid; the output pump is provided with a liquid inlet, a foam outlet and an air inlet, the liquid inlet is communicated with the liquid outlet end, the air inlet is communicated to the air outlet end, and the foam outlet outputs a liquid-air mixture. According to the cleaning assembly provided by the utility model, the output pump can pump the cleaning liquid in the cleaning liquid container into the liquid storage part so as to supplement the cleaning liquid for the liquid storage part, and meanwhile, the foam outlet of the output pump can also pump the cleaning liquid out of the liquid storage part and output a liquid-gas mixture after the cleaning liquid is mixed with gas, so that the range hood is cleaned; according to the range hood cleaning assembly, when the range hood is cleaned by the cleaning assembly, the range hood can be cleaned without arranging two water pumps, the structure is simpler, and the cost can be saved.

The invention discloses an ultralow-temperature high-pressure environment material mechanical property test system and method, the test system comprises a medium circulation system and a cold source supply system, the medium circulation system comprises a heat exchanger tube pass, a circulation pump and a test box, the heat exchanger tube pass, the circulation pump and the test box are connected in sequence, and a medium outlet of the test box is connected with a blow-down pipe; the cold source supply system comprises a heat exchanger shell pass, a first valve bank, a second valve bank, a gas-liquid mixer, a liquefied gas pump, a normal-temperature gas storage tank and a first liquefied gas storage tank, the heat exchanger shell pass accommodates the heat exchanger tube pass, an outlet of the first liquefied gas storage tank is connected to the first valve bank and the liquefied gas pump, and the liquefied gas pump is connected to the second valve bank. The first valve group and the second valve group are both connected to an inlet of the gas-liquid mixer, the second valve group is further connected to a pipeline where the circulating pump is located, an outlet of the gas-liquid mixer is connected to one end of the heat exchanger shell side, and the other end of the heat exchanger shell side is connected to the blow-down pipe through a discharge pipeline.

The invention relates to a BOG (Boil Off Gas) circulating treatment method for a marine ship and land liquid cargo film tank filling process, which comprises the following steps of: carrying out primary cooling on the top temperature in a second film tank, and then further cooling the second film tank; then the supercooled liquid goods are sprayed on a second film tank, the second film tank is communicated with the first film tank to achieve gas-liquid pressure balance, and then the filling process is conducted, specifically, the liquid goods in the first film tank are conveyed into the second film tank through a liquid goods pump and a liquid phase connecting hose. Compared with the prior art, the problem that storage of compressed low-temperature liquefied gas such as LNG is affected due to the fact that the temperature of a land liquid cargo thin film tank (or a ship thin film tank) is increased due to the fact that the land liquid cargo thin film tank (or the ship thin film tank) is exposed to the sun and BOG generated by liquid cargo such as LNG is increased can be effectively solved.

The invention provides a flash steam pressurization gas supply and reliquefaction circulation combined system and a liquid cargo ship. The combined system comprises a first heat exchanger, a second heat exchanger, a multi-stage compression device, a reliquefaction pipeline and a gas-liquid separation module, and flash steam is input into the first side of the first heat exchanger. The main inlet of the compression device is connected with the first side of the first heat exchanger. And a liquid return opening is formed in the pipeline before the last-stage compression in the compression device. And an outlet of the reliquefaction pipeline is connected with a second side inlet of the first heat exchanger and a first side inlet of the second heat exchanger through parallel connection of first and second pipelines. The second side of the first heat exchanger and the first side outlet of the second heat exchanger are connected with the liquid inlet of the gas-liquid separation module, the liquid outlet is connected with the liquid cargo tank, and at least part of gas discharged from the gas outlet is sent to the pipeline before the first-stage compression and after the first-stage compression of the liquid return port through the second side of the second heat exchanger. High-pressure gas supply and flash steam medium-pressure reliquefaction are achieved, energy consumption is reduced, and the reliquefaction capacity is improved.

The invention relates to a BOG dynamic balance treatment system for marine ship and land liquid cargo thin film tanks. The system comprises a first thin film tank and a second thin film tank, the first thin film tank is connected with the second thin film tank; the device further comprises a BOG cooling and pressure regulating mechanism. The system further comprises a liquid cargo processing mechanism. The BOG cooling and pressure regulating mechanism is connected with the second thin film tank; the liquid cargo processing mechanism is connected with the first thin film tank and the second thin film tank. And the BOG cooling and pressure regulating mechanism is connected with the liquid cargo treatment mechanism, so that the liquid cargo from the first thin film tank exchanges heat with the BOG from the second thin film tank. The first thin film tank is a ship thin film tank, and the second thin film tank is a land liquid cargo thin film tank; or the second film tank is a ship film tank, and the first film tank is a land liquid cargo film tank. Compared with the prior art, the problem that storage of compressed low-temperature liquefied gas such as LNG is affected due to the fact that the temperature of a land liquid cargo thin film tank (or a ship thin film tank) is increased due to the fact that the land liquid cargo thin film tank (or the ship thin film tank) is exposed to the sun and BOG generated by liquid cargo such as LNG is increased can be effectively solved.

The invention belongs to the technical field of steel cylinder welding equipment, and particularly relates to liquefied gas steel cylinder automatic welding equipment which comprises a bottom plate, two first clamping assemblies are arranged at the upper end of the bottom plate, each first clamping assembly comprises two first arc-shaped plates, and the two first arc-shaped plates can be close to each other; the two first clamping assemblies can slide at the upper end of the bottom plate, a second clamping assembly is arranged on one side of each first clamping assembly, each second clamping assembly comprises a first circular ring, a disc is rotationally arranged in each first circular ring, and a plurality of cylindrical blocks are slidably arranged on one side of each disc; the first circular rings can slide at the upper end of the bottom plate, a plurality of welding heads are arranged on one side of the upper end of the bottom plate, the upper tank body and the lower tank body are driven to get close to each other, then the cylindrical block is driven to clamp the protective cover and the base and get close to the tank bodies, then the tank bodies are driven to rotate, the welding heads weld all welding seams, and the working efficiency is improved.

A liquefier device which may be a retrofit to an air separation plant or utilized as part of a new design. The flow needed for the liquefier comes from an air separation plant running in a maxim oxygen state, in a stable mode. The three gas flows are low pressure oxygen, low pressure nitrogen, and higher pressure nitrogen. All of the flows are found on the side of the main heat exchanger with a temperature of about 37 degrees Fahrenheit. All of the gases put into the liquefier come out as a subcooled liquid, for storage or return to the air separation plant. This new liquefier does not include a front end electrical compressor, and will take a self-produced liquid nitrogen, pump it up to a runnable 420 PSIG pressure, and with the use of turbines, condensers, flash pots, and multi pass heat exchangers. The liquefier will make liquid from a planned amount of any pure gas oxygen or nitrogen an air separation plant can produce.

The invention discloses a directional fracturing device and a directional fracturing method.The directional fracturing device comprises a delay controller, a storage structure and a plurality of directional fracturing pipes, the storage structure is used for storing liquefied gas, the storage structure is connected with the directional fracturing pipes, and the directional fracturing pipes are connected with the delay controller. The directional fracturing pipe is used for introducing liquefied gas into the directional fracturing pipe, the directional fracturing pipe is provided with an energy release hole, the delay controller is electrically connected with the directional fracturing pipe, and the delay controller is used for igniting the directional fracturing pipe and controlling the detonating sequence of the directional fracturing pipe. According to the directional fracturing device and the directional fracturing method, liquefied gas phase change, precise delay blasting and the directional fracturing technology are combined, and more efficient and safer blasting operation can be achieved.

The present invention discloses a low-temperature storage tank and an installation structure and an installation method for a dihedral area thereof, which relate to the technical field of liquefied gas storage containers, and include an integrated installation assembly; the integrated installation assembly is in the shape of a dihedral angle, and includes an upper metal plate and a lower metal plate on either side of the dihedral angle, and the upper metal plate and the lower metal plate are integrally connected through a support portion; a rib plate is also integrally connected to the inner side of the lower metal plate; the connection line between the rib plate and the lower metal plate passes through both sides of the dihedral angle and intersects with the intersection line of the dihedral angle; the upper metal plate is welded to the main metal film plate of the bottom / wall of the storage tank; the lower metal plate is welded to the secondary metal film plate of the bottom / wall of the storage tank. By integrally connecting the upper and lower metal plates, and providing a rib plate with a height close to the main layer at the angle, the rib plate shares most of the stress in the angle area, and protects the angle area of ​​the upper metal plate.

The invention provides a liquefied gas steel cylinder positioning abnormity early warning method and device, can solve the problem that a traditional static threshold cannot adapt to complex scenes (such as traffic jam and population density change), and improves the early warning precision by dynamically adjusting a safety distance and a time threshold. Multi-dimensional anomaly recognition is carried out, for example, through fusion of positioning data, environment sensing data and distribution path verification, omnibearing monitoring from position offset to environment risk can be realized; graded early warning and intelligent response are carried out, for example, the alarm intensity can be adaptively adjusted according to day and night time periods and human traffic density, a standardized emergency process is automatically pushed to related departments, and the emergency efficiency is improved. Meanwhile, the system has an anti-resident-disturbing design, reduces the sound-light alarm intensity in a high-density area, avoids the accidental touch of a public safety event, plans an evacuation route through MAC address distribution, and improves the safety.

The invention relates to a rotary butt joint type bottom surface corrugation structure, and relates to the technical field of low-temperature liquefied gas storage, the rotary butt joint type bottom surface corrugation structure comprises corrugation subsections, each corrugation subsection comprises a wall surface corrugation section and a bottom wall corrugation section, a plurality of corrugation subsections surround to form a bottom surface corrugation, the number of the corrugation subsections is 8 + 8n, n is a positive integer greater than zero, and n is a positive integer greater than zero. The bottom wall corrugated section comprises a first rectangular corrugated section, a second rectangular corrugated section and a third rectangular corrugated section, and the first rectangular corrugated section is located on an internally tangent square of an externally tangent circle of the bottom wall corrugated section; the second rectangular corrugated section is located on an isosceles triangle with the side length of the first rectangular corrugated section as the bottom and the farthest distance from the first rectangular corrugated section to the wall surface corrugated section as the height, and the third rectangular corrugated section is located on the portion, not filled with the first rectangular corrugated section and the second rectangular corrugated section, of the bottom wall corrugated section. The method has the effect of reducing the types of customized turning pieces.

The present application provides a corrugated plate of a liquefied gas storage tank and a liquefied gas storage tank. The corrugated plate comprises a corrugated plate body; a transverse corrugation formed on the corrugated plate body; a longitudinal corrugation formed on the corrugated plate body and comprising a first longitudinal corrugation and a second longitudinal corrugation respectively located on two opposite sides of the transverse corrugation; reinforcing ribs respectively formed on the transverse corrugation, the first longitudinal corrugation, and the second longitudinal corrugation; and an intersection portion formed at the intersection of the transverse corrugation, the first longitudinal corrugation, and the second longitudinal corrugation. The corrugated plate of the present application has high overall strength and stability. In addition, the reinforcing ribs formed on the corrugations increase the surface area of the corrugated plate in contact with liquefied gas and increase the local cross-sectional area of the corrugations, thereby further enhancing the strength and rigidity of the corrugations and the corrugated plate.

The utility model relates to the field of heat preservation and heat insulation, and discloses a liquefied gas storage tank heat insulation device convenient to disassemble, a first connecting groove is formed in the middle of the left side and the right side of a heat insulation plate in a penetrating mode, a second connecting groove is formed in the middle of the upper side and the lower side of the heat insulation plate in a penetrating mode, and connecting strips are inserted into the first connecting groove and the second connecting groove. The first connecting grooves and the second connecting grooves are formed in the upper sides, the lower sides, the left sides and the right sides of the heat insulation plates correspondingly, the connecting strips are arranged in a matched mode, the multiple heat insulation plates can be directly connected in an inserted mode, then the heat insulation plates can be quickly spliced, and the outer side plates on the front sides of the heat insulation plates can be taken down; the heat insulation plate can be conveniently pushed in the corresponding space, the heat insulation plate can be conveniently installed, the corresponding heat insulation plate can be taken down only by taking down the outer side plate during disassembly, and subsequent disassembly and replacement are also facilitated.

The invention discloses a composite aperture molecular sieve catalytic cracking catalyst and a preparation method thereof, and belongs to the technical field of catalytic cracking, the composite aperture molecular sieve catalytic cracking catalyst comprises 20-30% of a macroporous material, 40-60% of a mesoporous-microporous molecular sieve and 20-30% of a binder; the macroporous material is a macroporous alumina / kaolin compound, and the macroporous alumina / kaolin compound takes macroporous alumina as a core and macroporous kaolin as a shell; the mesoporous-microporous molecular sieve is a ZMQ-1 molecular sieve. According to the mode, the macroporous material is prepared from the macroporous aluminum oxide / kaolin compound, the ZMQ-1 molecular sieve and the binder, and the macroporous material takes macroporous aluminum oxide as a core and macroporous kaolin as a shell in the macroporous aluminum oxide / kaolin compound. The catalyst for catalytic cracking of heavy oil has the advantages of high yields of dry gas, liquefied gas, gasoline and diesel oil, low yields of coke and heavy oil and the like. The secondary cracking reaction of gasoline or diesel oil can be effectively prevented, so that the yield of gasoline and diesel oil is improved.

A sealed and insulating tank for storing and / or transporting a liquefied gas has a sealed and self-supporting internal reservoir with an interior surface for contacting the liquefied gas and an outer surface with an insulating barrier covering the outer surface of the internal reservoir. The insulating barrier is fixed to the internal reservoir. An outer sealed membrane covers an outer surface of the insulating barrier, and the outer sealed membrane has a metal sheet provided with bellows or corrugations. The outer sealed membrane is fixed to the insulating barrier or the internal reservoir. An intermediate space between the internal reservoir and the outer sealed membrane contains a gaseous phase under depression in order to press the outer sealed membrane against the outer surface of the insulating barrier.

The invention provides a construction method for subsections of a bottom side tank of a liquefied gas ship, which comprises the following steps of: firstly, dividing the subsections of the bottom side tank into three parts, namely an inclined plate middle group, a bottom plate middle group and a bilge curved middle group by taking a bilge linear change position as a boundary; thirdly, the three middle sets are manufactured respectively, and internal related outfitting pieces are pre-buried; and finally, the three parts are assembled in a normal state, butt joints are welded, bulk parts are installed, and internal outfitting parts are installed in place. According to the method, the construction height can be reduced, the scaffold erection workload is reduced, repeated scaffold erection is effectively avoided, and the labor cost is effectively saved; in addition, the installation precision is remarkably improved, and reworking caused by poor assembly precision is reduced; the division method of the bottom side tank sections is optimized, so that the construction difficulty is reduced; and finally, the three parts of the middle group are constructed at the same time, and parts assembled and welded in the large group stage in the traditional construction mode are moved forwards to the middle group stage, so that the construction time of the large group is greatly shortened.

The present invention provides an arrangement structure of a fuel tank for cabins of a ship and electric propulsion, comprising: an electric propulsion system (110) which is arranged in an engine room (111) and provides power produced by a gas turbine (112) as a propulsion force to an electric propulsion motor; a first liquefied gas storage tank (120) which is arranged in a cargo section (A) and supplies a first gas fuel to the gas turbine (112); and a second liquefied gas storage tank (130) which is arranged in a bow section (b) and supplies a second gas fuel to the gas turbine (112), to thereby secure safety and an extra space in the engine room through the arrangement of the second liquefied gas storage tank (130) in the bow.

The invention relates to the technical field of storage and distribution of liquefied gas, and particularly discloses a pre-cooling, filling and waste gas treatment system of an LNG fuel ship, which comprises the following steps: S1, connecting a liquid nitrogen tank car with a gasification pry to pre-cool a fuel cabin of the LNG fuel ship; s11, low-temperature nitrogen / liquid nitrogen of the liquid nitrogen tank car is conveyed to the input pipeline through the gasification pry, and the low-temperature nitrogen / liquid nitrogen is conveyed to the fuel cabin through the input pipeline; s2, the LNG tank car is connected with a gasification pry to generate gasified natural gas to expel nitrogen in a fuel cabin of the LNG fuel ship, and LNG replacement of the fuel cabin is completed; s3, the LNG tank car achieves gas-phase pressurization through a gasification pry, LNG is conveyed to a fuel cabin through an input pipeline, and LNG filling of the fuel cabin is completed; and S4, the LNG tank car achieves gas-phase pressurization through the gasification pry and the filling pry, LNG enters an LNG immersed pump of the filling pry, the LNG is conveyed to the fuel cabin through the LNG immersed pump, and LNG filling of the fuel cabin is completed.