摘要:
A method for producing at least one air product, wherein an air separation system is used which has a primary air compressor, a primary heat exchanger and a distillation column system, and which comprises a first and a second operation mode, wherein, in the first operating mode, at least one liquid air product produced in the distillation column system is saved and, in the second operating mode, the at least one air product saved in the first operating mode and/or at least one additional liquid air product is supplied to the distillation column system.
摘要:
A method and device to produce oxygen by the low-temperature separation of air at variable energy consumption. A distillation column system comprises a high-pressure column, a low-pressure column and a main condenser, a secondary condenser and a supplementary condenser. Gaseous nitrogen from the high-pressure column is liquefied in the main condenser in indirect heat exchange with an intermediate liquid from the low-pressure column. A first liquid oxygen stream from the bottom of the low-pressure column is evaporated in the secondary condenser in indirect heat exchange with feed air to obtain a gaseous oxygen product. The supplementary condenser serves as a bottom heating device for the low-pressure column and is heated by means of a first nitrogen stream from the distillation column system, which nitrogen stream was compressed previously in a cold compressor.
摘要:
The invention relates to cryogenic engineering, in particular to purifying krypton-xenon mixture and is usable in the chemical and oil-and-gas industries. The inventive method comprises purifying and separating the mixture in rectification columns, wherein coolant is removed and returned to a cooling cycle, additionally removing radionuclides from krypton and xenon fractions and from krypton and xenon production flows by means of filtration and/or adsorption and/or rectification and/or absorption and/or chemical and/or physicochemical methods in apparatuses for additional removing radionuclides. Balloons for reception of the separated products are certified with respect to radionuclides content and/or activity prior to and after the filling thereof. An installation for carrying out the method is also disclosed, allowing to additionally remove radionuclides from the separated products in such a way that the products can be used, for example, for medical purposes and to increase the cost efficiency of purification and separation processes.
摘要:
Air is separated in a cryogenic distillation system operating a dual reboiler/condenser cycle. Refrigeration for the system is usually provided by expanding a process stream. In the present invention, refrigeration is provided by introducing from an external source at least one refrigerant.
摘要:
A power generator provides power with minimal CO2, NOx, CO, CH4, and particulate emissions and substantially greater efficiency as compared to traditional power generation techniques. Specifically nitrogen is removed from the combustion cycle, either being replaced by a noble gas as a working gas in a combustion engine. The noble gas is supplemented with oxygen and fuel, to provide a combustion environment substantially free of nitrogen or alternatively working in 100% oxygen-fuel combustion environments. Upon combustion, Very little to no nitrogen is present, and thus there is little production of NOx compounds. Additionally, the exhaust constituents are used in the production of power through work exerted upon expansion of the exhaust products, and the exhaust products are separated into their constituents of noble gas, water and carbon dioxide. The carbon dioxide may be used in conjunction with a biomass to accelerate the biomass growth and to recover the oxygen enriched air resulting from algae photosynthesis for enhancing the operation of the power generator using the as Biomass for processing into methanol/ethanol and biological oils as fuel for the power generator. The biomass fuel is seen as a solar fuel and may be used in conjunctions with other solar fuels like heated thermal oil and others, as well as clean fossil fuels to optimize to clean, and efficient operation of the power generator in various regulatory contexts.
摘要:
A process for collecting oxygen-enriched air during a phase of aerobic flight of a space launch for combustion inside at least one cryotechnic rocket engine beyond the atmosphere is provided. The launch rocket comprises at least one engine of a turbofan type. The turbofan comprises a high-pressure spool comprising a high pressure compressor, a combustion chamber, turbines, and a low-pressure spool surrounding the high-pressure spool. The spools comprise a blower for collecting the external fluid in the form of a main flow and a derived flow. The main flow follows a path of various compression, combustion and depressurization cycles in the turbofan engine. The derived flow is separated in a separator into a flow of oxygen-enriched air and a flow of oxygen-depleted air. The flow of oxygen-enriched air is stored for combustion inside a rocket engine, while the flow of oxygen-depleted air is ejected.
摘要:
Air is distilled in a distillation apparatus (13) associated with a heat exchange line (11) in which is circulated a heat transfer fluid under high pressure. A storage (20, 23) is supplied, at least intermittently, with gas in liquid phase; and gas in liquid phase withdrawn from the storage is raised to a vaporization pressure, and vaporized under this pressure in the heat exchange line (11). The supply of liquefied gas to the storage can be from the distillation apparatus (13) and/or from an external source such as a tank truck (29, 34). It is useful particularly for the supply of oxygen, nitrogen and argon under pressure to installations for the production of stainless steel such as electric arc furnaces.
摘要:
A producing apparatus of highly pure nitrogen gas which is used in electronic industry for manufacturing silicon semi-conductors. Conventional nitrogen gas producing apparatus of low temperature separation method and of PSA method are subjected to troubles frequently, the cost of the obtained product nitrogen gas is high, yet the purity is not very high. By the apparatus of this invention, the liquefied nitrogen storage means (23) is connected to rectifying column (15) through the inlet channel (24), the ultra low temperature compressed air supplied into the rectifying column (15) through the air compression means (9), removing means (12) and heat exchangers (13) (14) is cooled further by the evaporating heat of the liquefied nitrogen, the nitrogen is taken out in gas form by utilizing the difference in boiling point, and oxygen is left as liquid. The obtained nitrogen gas is combined with the gassified liquid nitrogen from the liquefied nitrogen storage means (23) and made into product nitrogen gas. Highly pure nitrogen gas can be produced at a low cost and with almost no trouble of the apparatus.
摘要:
This invention is about an air separation apparatus to produce oxygen and nitrogen through isobaric separation, which is based on the Rankine cycle system of similar thermal energy power circulation apparatus at cryogenic side, a liquid pump is used to input work and the cold is made up to the air separation apparatus with refrigerating media, so as to realize the isobaric separation of air to produce nitrogen and oxygen. The air separation apparatus of this invention can save energy by over 30% as compared with the traditional advanced apparatus with the identical refrigerating capacity, and it can also realize centralize gas supply via the air separation apparatus, therefore it constitutes a breakthrough to the traditional air separation technology and refrigeration theory, with substantial economic, social and environmental protection benefits.