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Process and device for generating a pressurized product by low-temperature air fractionation

A low-temperature air separation and gas pressure technology, which is applied in the directions of cold treatment separation, liquefaction, solidification, etc., can solve the same speed change and other problems, and achieve the effect of avoiding product release.

Inactive Publication Date: 2007-10-31
LINDE AG
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Problems solved by technology

Another example is an air separation plant whose production continuously adapts to the current consumption, but whose load (production rate) cannot change at the same rate as the consumption and therefore has temporary discontinuities during load regulation Insufficient or surplus

Method used

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  • Process and device for generating a pressurized product by low-temperature air fractionation
  • Process and device for generating a pressurized product by low-temperature air fractionation

Examples

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Embodiment Construction

[0027] The air 1 is brought to a first pressure P1 in a main air compressor 2 . The compressed air 3 is cleaned in a cleaning device 4 . The cleaned air 5 branches off into a first partial flow 6 and a second partial flow 7 . The first substream 6 is cooled to approximately the dew point in a main heat exchanger 9 and flows via lines 10 and 11 into the distillation column system for nitrogen and oxygen separation, which in this example has a main pressure column and A secondary pressure column with which the primary pressure column is in heat exchange relationship via a common condenser-evaporator, the so-called primary condenser. The air 11 is conducted into the high-pressure column in a practically complete gaseous state.

[0028] In the distillation column system 12 for nitrogen and oxygen separation, air is separated into at least one oxygen-enriched product stream 13 and at least one nitrogen-enriched fraction (not shown). Product stream 13 has an oxygen content of, fo...

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Abstract

The method involves compressing, purifying and cooling process air (11), and supplying the air to a distillating column-system (12) for nitrogen-oxygen separation. A fluid product stream is brought to an increased pressure in a fluid condition and is pseudo-evaporated under the increased pressure. The evaporated product stream is guided to a discharging system (19) as a pressure product. The pressure in varied and the variation of the pressure is performed based on the pressure of the discharging system. An independent claim is also included for a device for producing a pressure product.

Description

technical field [0001] The invention relates to a process for producing a pressure product by means of internal compression by cryogenic air separation. Background technique [0002] Methods and devices for the cryogenic separation of air are known, for example, from Chapter 4 of "Cryogenic Technology", 2nd edition, 1985 (pp. 281 to 337) by Hausen / Linde. A "distillation column system" includes at least one separation column and a condenser and an evaporator assigned to the separation column of the system. The distillation column system for nitrogen and oxygen separation of the present invention can be configured as a single tower system for nitrogen and oxygen separation, can be configured as a double tower system (such as configured as a typical Linde double tower system), or can also be configured as three towers or Multi-tower system. In addition to the column for the separation of nitrogen and oxygen, the system can also have other devices for obtaining other air compo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25J3/04
CPCF25J3/04103F25J3/04296F25J3/04412F25J3/04836F25J2290/10F25J3/04848F25J3/0409F25J1/00
Inventor 霍斯特·科尔迪昂乌尔里希·埃韦特格哈德·蓬普尔
Owner LINDE AG
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