1434 results about "Liquid gas" patented technology

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 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 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 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.

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 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.

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 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 present invention discloses a liquefied gas graded purification device, comprising a main pipeline, wherein a plurality of processing valves are connected in the main pipeline, wherein an elastic compression mechanism for maintaining an open state is provided in the processing valve, a hydrogen separation membrane is provided below the plurality of processing valves, and an output main pipeline is provided between the plurality of hydrogen separation membranes for connection, a switch valve body is provided on one side of the terminal processing valve, and a triggering control mechanism for gradually controlling the plurality of elastic compression mechanisms downward and the switch valve bodies to open from one side to the other is provided on the main pipeline. When the mixed gas enters the filter tube, it is provided with a plurality of filter cavities, which can realize multi-stage repeated filtration and achieve more accurate and stable filtration of the hydrogen in the mixed gas. At the same time, each filter cavity can be gradually pressurized to pressurize the mixed gas in each cavity, so that the hydrogen can better pass through the hydrogen filter membrane.

The invention provides a safety control system for ship-to-ship liquefied natural gas unloading. The system comprises a liquefied transport ship, a floating storage ship, a dynamic control module and a land terminal processing mechanism. The land terminal processing mechanism comprises a gas discharge unit and a liquid storage unit; the dynamic control module is composed of an unloading regulation and control unit, a temperature regulation and control unit and a pressure regulation and control unit. The output end of the transport ship is connected with the floating storage ship through a first liquid channel; the connecting output end of the floating storage ship is connected with the liquid storage unit through a second liquid channel; the floating storage ship is connected with the transport ship through a first gaseous loop; the floating storage ship is connected with the gas discharge unit through a second gaseous loop; the dynamic control module controls the first liquid channel, the second liquid channel, the first gaseous loop and the second gaseous loop to work through a remote network. The potential safety hazard caused by improper unloading rate control, temperature difference over-limit and insufficient pressure regulation of the liquefied natural gas in the prior art is solved.

The invention relates to a wall (11) for a leaktight and thermally insulating vessel for storing a liquefied gas, said wall (11) comprising, in succession in a thickness direction from the outside to the inside of the vessel, a leaktight outer barrier (13), a thermally insulating barrier (14) and a leaktight inner barrier (15), the thermally insulating barrier (14) having a gas phase at an absolute pressure of less than 1 Pa and comprising:—a radiative multilayer insulation cover (47) which extends at right angles to the thickness direction, said radiative multilayer insulation cover (47) comprising a stack of a plurality of sheets which are made of metal or polymer material coated with a metal and which are separated from one another by a textile layer; and-insulating elements (51) which have an open-celled porous structure and are arranged between the radiative multilayer insulation cover (47) and the leaktight outer barrier (13).

The present invention provides a tank supporting structure for a hull which allows a hull having a hull outer plate and a hull inner plate disposed above the hull outer plate to support a liquefied gas tank disposed in a hold surrounded by the hull inner plate, said tank supporting structure comprising: at least one protruding deck which extends substantially horizontally from the hull inner plate toward the inside of the hold; a plurality of tank skirts which support the liquefied gas tank by being joined to the protruding deck or the hull inner plate and which include a first skirt joined to an upper surface of the protruding deck; and a plurality of skirt back reinforcing materials which reinforce joined parts of the plurality of tank skirts by being joined to the protruding deck or the hull inner plate and which include a first skirt back reinforcing material joined to a lower surface of the protruding deck.

The invention discloses an automatic leak-proof detection method for liquefied gas filling production, which is used for timely finding and processing leakage conditions and improving the reliability of leakage judgment and the production safety. A temperature acquisition device is arranged at the leakage point to acquire the temperature value of the leakage point in real time; the temperature variation T of the current temperature acquisition time point is calculated at each temperature acquisition time point, and in each leakage detection period, the temperature variation trend in the current leakage detection period is obtained according to the real-time temperature variation T of each temperature acquisition time point in the current leakage detection period; and judging whether leakage is generated or not according to the temperature change trend. According to the method, the principle that the temperature of leaked gas is different from the atmospheric environment temperature, and when leakage occurs, the environment temperature changes is utilized, the automatic detection function is achieved through an indirect method of measuring the temperature of a temperature collecting device installed on a leakage source, interference factors caused by environment temperature changes are eliminated, and the leakage detection accuracy is improved. Accident risks caused by gas leakage are prevented, and the production efficiency is improved.

The invention relates to the technical field of air separation, in particular to a pretreatment module of an air separation system, a high-purity air separation system and a control method.The pretreatment module comprises a precooling unit, and the precooling unit is connected with a cold source; the pre-cooling unit enables cooling water to circularly flow in the supercharging unit through a cooling water pipeline, and the supercharging unit comprises a first air compressor, a second air compressor, a high-temperature expansion machine supercharging end, a first supercharger after-cooler, a low-temperature expansion machine supercharging end and a second supercharger after-cooler which are sequentially connected in series through a main pipeline; supercharged and precooled air is expanded and cooled by the expansion unit and then enters the heat exchange unit; through the arrangement of the pre-cooling unit, the inlet and outlet temperatures of the high-temperature expansion machine and the low-temperature expansion machine are effectively controlled, reheated air returns to the air compressor, the expansion gas amount is increased, reheated gas continuously cools the air participating in rectification in the heat exchange unit, and in conclusion, the production energy consumption of a high-purity liquefied gas product is reduced.

A purge apparatus is provided. The purge apparatus is capable of preventing air from being entrained when a submersible pump is moved into a pump column, and capable of warming the submersible pump when the submersible pump is removed from the pump column to thereby prevent component of the air from being liquefied, thus preventing the liquefied gas from being emitted in the atmosphere. The purge apparatus includes a hermetic purge container configured to accommodate the submersible pump therein; a vacuum line coupled to the hermetic purge container and coupled to a vacuum source; a purge-gas supply line coupled to the hermetic purge container and coupled to a purge-gas supply source; and a purge-gas supply valve mounted to the purge-gas supply line.

A container for pressurized liquid gas, such as LPG or LNG, having an opening leading from outside to inside of the container and having a microwave fluid level sensor mounted on the outside of the container over the opening and configured to emit a microwave beam towards the inside of the container and to receive a microwave beam reflected from the surface of the liquid inside the container. Between the microwave fluid level sensor and the inside of the container there is a lid closing the opening, wherein the lid is made of plastic material capable of transmitting at least a part of the microwave beams.

The present disclosure relates to a liquid oxygen vent silencer used in an oxygen production process implemented so as to eliminate potentially explosive elements, and the vent silencer is manufactured using copper plates and stainless (SUS) having no risk of explosions to minimize an edge that collide with oxygen gas, and includes a silencer body that receives cryogenic liquid gas and moves an internal space up and down to reduce noise; and a body support that is installed along an outside of the silencer body and supports the silencer body by raising or lowering the silencer body from a ground.

The utility model discloses a hot melting device for lap joint of SBS (styrene butadiene styrene) waterproof coiled materials, which belongs to the technical field of waterproof construction equipment, and adopts the technical scheme that the hot melting device for lap joint of the SBS waterproof coiled materials is characterized by comprising a shell, a PTC (positive temperature coefficient) heating plate is arranged on one side of the shell, a battery electrically connected with the PTC heating plate is arranged in the shell, and the PTC heating plate is connected with the battery. And a control switch is connected in series between the PTC heating plate and the power supply. The waterproof roll heating device has the advantages that the waterproof roll is heated through the PTC heating plate, and compared with a liquefied gas heating device, the waterproof roll heating device is relatively small in size and high in safety.

The present invention relates to a method of starting a submersible pump used for transferring liquefied gas. The method includes starting a submersible pump (1A) disposed in a suction container (2A) of a pump apparatus (100A) to deliver liquefied gas to a suction container (2B) of a pump apparatus (100B) through a flow-path switching device (5A) in the suction container (2A), passing the liquefied gas through a flow-path switching device (5B) in the suction container (2B) while the liquefied gas bypasses a submersible pump (1B) disposed in the suction container (2B), and then starting the submersible pump (1B).

The invention relates to a wall (10) for a sealed and thermally insulating tank for storing a liquefied gas, comprising a primary thermally insulating barrier (14) with a plurality of bearing elements (30) and a radiative multilayer insulation blanket (47), said blanket being attached to one of the bearing elements by an attachment device (51) comprising a connection portion attached to said bearing element and a support portion, in which the connection portion comprises two portions that are movable relative to one another between a spaced-apart position in which the two portions are spaced apart from one another in order to allow the bearing element to be passed through the attachment device and a close-together position in which the two portions are closer to each other compared to the spaced-apart position, so that the attachment device can be immobilized on the bearing element.

The invention relates to the field of thin film tank maintenance, and discloses a low-temperature liquefied gas storage tank heat insulation maintenance system and an installation method thereof.The low-temperature liquefied gas storage tank heat insulation maintenance system comprises a main shielding layer, a plurality of secondary-layer corrugated plates, a plurality of knots and a plurality of insulation box structures; the plurality of insulation box structures are used for being mounted on an outer tank; the insulation box structure comprises a secondary-layer insulation box, a secondary-layer steel plate and a main plywood which are arranged in sequence. A gap is formed between adjacent insulation box structures, the secondary corrugated plate is only arranged at the gap, and the side edge of the secondary corrugated plate is welded with the secondary steel plate; and the knots are arranged at the intersections of the adjacent gaps. According to the invention, the deformation of the corrugated plate is more uniform by reducing the shrinkage amount of a single insulation box, the workload of field installation can be reduced, and the procedure of traditional layered construction is optimized, so that the construction efficiency is improved, and the construction period is shortened.

A gas supply device of the disclosure includes: a liquefied gas vessel in which liquefied gas is stored; an injector configured to discharge the liquefied gas sucked from the liquefied gas vessel; a first liquefied gas supply path through which the liquefied gas is selectively allowed to flow from the liquefied gas vessel toward the injector; a gas supply path through which gas is selectively supplied to a gas utilization unit, the gas being obtained by vaporizing the liquefied gas flowing in from the injector during flowing through the gas supply path; and a drive fluid supply path through which the gas obtained in the gas supply path is selectively supplied as a drive fluid to the injector.