184 results about "Liquid argon" patented technology

A method and apparatus for producing a purified liquid argon product in which liquid argon having oxygen impurities is produced in a cryogenic air separation plant by separating argon from oxygen within an argon column. An impure liquid argon stream, composed of part of the liquid argon, is purified in an adsorbent bed by adsorbing the oxygen impurities in an adsorbent to produce a purified liquid argon stream that constitutes the purified liquid argon product. During adsorption, the adsorbent bed is maintained at a reduced temperature with a coolant to prevent vaporization of the liquid argon. The bed is then regenerated by draining residual liquid argon from the adsorbent bed, introducing the residual liquid argon back into the air separation plant and then desorbing the oxygen impurities with a regeneration gas. After regeneration, the adsorbent bed is refilled with purified liquid argon prior to being brought back on-line.

Provided is a method and a device for recovering and purifying argon in monocrystalline silicon production. The method comprises firstly conducting coarse oil removal on argon recovered from a single crystal furnace, compressing, cooling and conducting high-precision oil removal and dedusting; secondly enabling hydrocarbon such as methane and carbon monoxide to be reacted with oxygen to generate water and carbon dioxide through a high temperature catalytic reaction and guaranteeing the oxygen to be excessive in the catalytic reaction; thirdly enabling excessive oxygen to be reacted with added hydrogen to generate the water under effects of a catalytic agent after cooling and enabling argon after two catalytic reactions to penetrate through a normal temperature adsorption unit to absorb the water and the carbon dioxide; cooling the argon, sending a low temperature rectifying tower, enabling the argon, the nitrogen and the hydrogen to produce rectification separation, obtaining pure liquid argon, and conducting repeated heating to obtain pure argon products. The device mainly comprises an oil filter, a catalytic reactor of the hydrocarbon of high temperature catalytic oxidation carbon monoxide and methane and the like, a normal temperature hydrogenation deoxygenization catalytic reactor, a normal temperature adsorption unit for absorbing the carbon dioxide and the water at the normal temperature and the low temperature rectifying tower for rectifying and separating the hydrogen and the nitrogen at the low temperature. The device has the advantages of being high in argon recovery rate, high in purity of recovered argon, low in oxygen content, low in energy consumption for recovery and purification and the like.

The invention belongs to the technical field of space division, and in particular relates to a dual-tower argon producing system and a process thereof for producing argon by low temperature fractionation. The process comprises that: an air fractionating tower produces argon fraction containing 6 to 10 percent of argon GAR1; the argon fraction containing 6 to 10 percent of argon GAR1 is introduced into an argon roughening tower II (C3-2) to form argon fraction GAR2; the argon fraction GAR2 is introduced into an argon roughening tower I (C3-1); in the argon roughening tower I (C3-1), oxygen and nitrogen are removed through the rectification of an argon refining tower, and pure liquid argon is formed between the upper section and the lower section of the argon roughening tower I (C3-1), and is extracted to serve as a product. The system and the process have the advantages of simple process flow, low difficulty in controlling each part, investment conservation and high safety.

The invention relates to a process for removing oxygen from liquid argon using a TSA (temperature swing adsorption) cyclical process that includes cooling an adsorbent bed to sustain argon in a liquid phase; supplying the adsorbent bed with a liquid argon feed that is contaminated with oxygen and purifying the liquid argon thereby producing an argon product with less oxygen contaminant than is in the initial liquid argon feed; draining the purified residual liquid argon product and sending purified argon out of the adsorbent bed. Regeneration of specially prepared adsorbent allows the adsorbent bed to warm up to temperatures that preclude the use of requiring either vacuum or evacuation of adsorbent from the bed.

The invention discloses a laser metal direct forming method of liquid argon jet cooling directional solidification. The method is characterized in that: positive temperature gradient is kept all the time along the Z-axis direction in a molten pool in the subsequent forming process by adopting a method of liquid argon jet and quick cooling performed below the formed layer once a certain layer number is stacked. Meanwhile, the liquid argon for cooling is converted into argon gas and can also be used for reducing oxygen content in an argon protection box. Therefore, the columnar crystal tissue in a formed piece is continuously grown from a substrate along the Z-axis forming direction, and the formed piece obtains complete directional solidification columnar crystal tissue.

The invention provides an all-rectification argon extraction oxygen-enriched air separation device, and relates to the field of air separation equipment. The device comprises an air pretreatment section, a rectification section and a finished argon section; the rectification section comprises a lower tower, an upper tower, a condensation evaporator, a main heat exchanger, a supercharger/expander,a supercharged cooler and a subcooler; an oxygen-enriched liquid air outlet at the bottom of the lower tower is connected with an oxygen-enriched liquid air runner of the subcooler to divided into twoways, which are connected with an oxygen-enriched liquid air inlet of the upper tower and a liquid inlet of a rough argon condenser; liquid oxygen at the bottom of the upper tower enters the condensation evaporator, and is divided into two ways from an outlet of the condensation evaporator; one way is used as product liquid oxygen to connect with a pure liquid oxygen product conveying pipe, and the other way is connected with a liquid pump and the oxygen-enriched liquid air outlet at the bottom of the lower tower in sequence; argon distillates at the lower part of the upper tower pass througha first rough argon tower, a second rough argon tower and a finish argon tower in sequence to obtain pure liquid argon. The device has the beneficial effects of argon extraction by the oxygen-enriched air separation device, increment of the device product types and improvement of the economic benefit.

Low-temperature thermal power generation is realized in a new circulating mode. Natural substances such as liquid air, liquid nitrogen, liquid argon (1) and the like which exist in the atmosphere are taken as refrigeration working substances; the liquid nitrogen and the liquid argon are taken as assistant cold sources (13); the working substances are conveyed by a low-temperature liquid pump (2) in a pressure boosting mode; the working substances are cooled and cold is recovered by a low-temperature heat exchanging device (7); an intermediately-cold working substance performs heat exchange (15 and 14) with a low-grade heat source to generate intermediate-and-high pressure gas; one part of gas working substance of which the enthalpy value is increased is inflated to do work to generate electricity (17); and electric energy is merged into a local power grid (18). The other part of working substance is inflated in the pressure boosting mode (19) to generate the cold; the working substance is cooled, condensed, mixed and recovered by a low-temperature heat exchanging device (9) and an ejector (8); the working substance is supercooled in a liquefying mode (5) and recycled; and parameter detection, control and the like are realized by a computer control system (21).

The invention relates to a dual-medium supercritical low-temperature thermal performance test platform. The test platform comprises the following components: a low-temperature loop, a high-temperature loop and an ethylene glycol loop, wherein a first test sample machine and a second test sample machine are arranged in parallel in the low-temperature loop; in the high-temperature loop, a high-temperature medium circulation pump, a high-temperature loop flow meter and a valve for cutting off an opening and closing pipe connected in series by a high-temperature medium circulation pipe are arranged between a high-temperature loop storage tank and a hot-side medium channel of the first test sample machine; in the ethylene glycol loop, an ethylene glycol circulation pump, an ethylene glycol loop flow meter and a valve for cutting off an opening and closing pipe connected by an ethylene glycol circulation pipeline are arranged between an ethylene glycol storage tank and a hot-side medium channel of the second test sample machine. With the adoption of a technical scheme provided by the invention, the thermal performance test for heat exchange between a low-temperature medium and each of two media including high-temperature water and ethylene glycol can be realized, thereby greatly expanding a test range of the supercritical low-temperature medium. The low-temperature medium in the invention comprises, but is not limited to, liquid nitrogen, liquid oxygen, liquid argon, liquefied natural gas and the like.

The invention relates to a pressure container with heat insulation measures, in particular to a welded adiabatic gas cylinder which comprises a cylinder body, a valve base, a safety valve, a rupture disk, a pressure gauge, a liquidometer and a connection pipe. The cylinder body consists of an inner tank and a housing; a vacuum interlayer is formed between the inner tank and the housing; an insulating layer is arranged in the vacuum interlayer; a supporting system and an inner evaporator are also arranged on the welded adiabatic gas cylinder; the supporting system is arranged in the vacuum interlayer and connected with the inner tank; the insulating layer is a structure of more than two layers of insulated packing layers, and the inner evaporator is arranged in the vacuum interlayer and provided with a degasser layer attached on the inner tank or attached on the housing. The welded adiabatic gas cylinder has the advantages of low heat leakage, good low-temperature insulating effect, excellent supporting strength, convenience for use, high loading rate, security and reliability, high purity of stored gas, high vacuum degree, long vacuum service life and the like and is mainly applied to low-temperature liquid such as liquid oxygen, liquid nitrogen and liquid argon.

The invention discloses a system for increasing the yield of liquid argon. The system comprises a first crude argon column, a second crude argon column, a buffer tank and a pure argon column. The first crude argon column is connected with the second crude argon column; the second crude argon column is connected with the buffer tank; and the buffer tank is connected with the pure argon column. The first crude argon column performs oxygen and argon separation on argon fractions with the oxygen content ranging from 88% to 92%, which are extracted in the middle of an upper column of an air separation system, and transmits crude argon with the oxygen content smaller than 3%, which is obtained after separation, to the second crude argon column. The second crude argon column performs oxygen and argon separation on the received crude argon with the oxygen content smaller than 3% again and outputs argon obtained after separation, of which the oxygen content is smaller than 3ppm, to the buffer tank. The buffer tank stores the received argon with the oxygen content smaller than 3ppm and outputs the argon to the pure argon column after the flow and the pressure are balanced. The pure argon column performs oxygen and argon separation on the received crude argon with the oxygen content smaller than 3%, which is output by the buffer tank, to extract pure liquid argon products. By means of the system, the yield of liquid argon can be improved.

The invention provides a synthesis method of a layered rhenium-nitrogen compound ReN2 and belongs to the technical field of synthesis methods of transition metal compounds. The method comprises the following steps: mixing rhenium powder and sodium azide at a mass ratio of 1:2 so as to serve as raw materials, placing the mixture in a mortar, fully grinding, feeding the ground mixture into a DAC device, introducing liquid argon into the DAC device, then pressurizing the raw materials to 30 GPa, and performing laser heating for 8-12 minutes at a power of 20W, so as to obtain ReN2 with a layered structure. The raw materials used in the method are stable in air; the experimental preparation process is simple, the synthesis safety is good, and the repeatability is high.

The present invention generally relates to a method to enhance heat transfer in the temperature swing adsorption process (TSA) and to an intensified TSA process for gas/liquid purification or bulk separation. Helium is designed as the heat carrier media to directly bring heat/cool to the adsorbent bed during the TSA cycling process. With helium's superior heat conductivity, the time consuming regeneration steps (warming, regeneration and precooling) of TSA process can be significantly reduced and allowing for the TSA process to be intensified.

The invention relates to the field of advanced manufacturing and high-temperature alloys, in particular to a high-chromium nickel-based high-temperature alloy and a preparation method and an application thereof. The high-chromium nickel-based high-temperature alloy is prepared from the following components in percent by mass: 30-35% of Cr, 1-2% of Ti, 1-2% of Al, 2-3% of Ta, 1-2% of Nb, 2.5-3.5% of Mo, 4-5% of W, 0.2-0.5% of Fe, 0.005-0.03% of C, 0.003-0.01% of B, 0.003-0.01% of Y and the balance Ni. According to the high-chromium nickel-based high-temperature alloy prepared by a laser additive manufacturing method, thermal stress is reduced to reduce deformation and cracks of a workpiece in the laser additive manufacturing process by optimizing parameters of the laser additive manufacturing process and carrying out cooling by way of liquid argon synchronous chilling in the laser additive manufacturing process, and net shaping of the high performance high-chromium nickel-based high-temperature alloy is achieved, so that the high-chromium nickel-based high-temperature alloy which is excellent in comprehensive performance is obtained. The high-chromium nickel-based high-temperature alloy is suitable for the fields of aerospace, petrochemical engineering, nuclear power industry and the like.

The invention discloses a wood-plastic aluminum alloy door and window with a fire-extinguishing function. The wood-plastic aluminum alloy door and window with the fire-extinguishing function comprisesa frame body, a header tank and a first mounting box. The header tank is formed in the bottom of the frame body. The first mounting box is arranged at the bottom of one end of the frame body, and a first water pump is arranged at the middle position of the inner bottom end of the first mounting box. A first suction pipe extending to the header tank is arranged in the input end of the first waterpump. The output end of the first water pump communicates with the storage tank through a conveying water pipe, and the middle position on the top of the front face of the frame body is provided witha fireproof water tank. By the installation of liquid inert gas storage tanks and solenoid valves, liquid nitrogen, liquid carbon dioxide or liquid argon gas can be sprayed when flames reach the doorand window to effectively extinguish fires. By the installation of the storage tank and a water injection nozzle, the door and window which is on fire can be cooled to prevent survivors from being scalded through the hyperthermal door and window.

A cryopump cooled by a GM type refrigerator is disclosed in which the cold (second stage) cryopanel(s) are in planes that are pitched parallel to the axis of the expander cylinder; the cold end of the first stage expansion space is close to the point where the expander cylinder enters the vacuum housing that contains the cryopanels; and a drain system removes all the liquid argon and water flowing out through a vent port for two orientations of the cryopump.

The invention discloses a method and a device for preparing liquefied methane by using synthesis ammonia tail gas. The method comprises the following steps of: 1, removing the synthesis ammonia tail gas and harmful gas which is exhausted during the production of synthesis ammonia in carbon dioxide gas, pressurizing the synthesis ammonia tail gas and/or the carbon dioxide gas to ensure that the pressure of the two kinds of gas is consistent, and mixing; 2, introducing the mixed gas into a methanation reaction furnace for reaction to ensure that carbon dioxide is reacted with hydrogen to produce methane and water; 3, introducing the reacted gas into a gas purifying device to remove the water and the carbon dioxide in the gas; and 4, introducing the purified gas into a methane liquefaction device, liquefying methane gas by cooling and rectification processes, separating the liquefied methane out of the methane liquefaction device, storing and packaging. In addition, the gas separated out of the methane liquefaction device can be introduced into an argon liquefaction device to prepare liquid argon. By the method, energy in the emptied tail gas is recycled, and the exhaust amount of greenhouse gas is reduced.