Grundner, Sebastian

A method (100) for operating an adsorption arrangement (10) comprising adsorption vessels (11, 12) with adsorption beds is provided. The adsorption vessels (11, 12) are operated in operating cycles including in an adsorption mode and a regeneration mode, the regeneration mode comprising a heating phase and a cooling phase subsequent to the heating phase. The method (100) comprises defining (110) one or more accumulation targets for one or more components to be adsorbed in the adsorption vessels (11, 12) in the adsorption mode, and one or more regeneration targets for the regeneration mode, determining (120), at one or more instances during the adsorption mode, a remaining adsorption time in which an adsorption vessel (11, 12) presently operated in the adsorption mode may still be operated in the adsorption mode without exceeding the one or more accumulation targets, and a total adsorption time including an elapsed adsorption time and the remaining adsorption time, and determining (130), during the remaining adsorption time, a heating time used for the heating phase, a cooling time used for the cooling phase, and one or more flow rates of one or more regeneration gases used in the regeneration mode such as to meet the one or more regeneration targets. Said determining (120, 130) the remaining adsorption time, the heating time, the cooling time, and the one or more flow rates includes using one or more tuning factors to modify at least the one or more accumulation targets and the one or more regeneration targets. An adsorption arrangement (10) as well as an air separation unit (1000) including an adsorption arrangement is also proposed.

Ein Verfahren zum Bearbeiten eines Krypton, Xenon, Methan und Sauerstoff enthaltenden Einsatzgemischs (1) wird vorgeschlagen, wobei eine Katalyseanordnung (110), eine Adsorptionsanordnung (120) mit zwei Adsorberbehältern (201, 202) und eine Rektifikationsanordnung (130) verwendet wird, wobei jeder der Adsorberbehälter (201, 202) nacheinander in einem ersten Betriebsmodus, einem zweiten Betriebsmodus, einem dritten Betriebsmodus und einem vierten Betriebsmodus betrieben wird, die Adsorberbehälter (201, 202) derart zeitlich versetzt zueinander betrieben werden, dass immer dann einer der Adsorberbehälter (201, 202) in dem zweiten Betriebsmodus betrieben wird, wenn der andere der Adsorberbehälter (201, 202) in dem vierten Betriebsmodus betrieben wird, dem Adsorberbehälter (201, 202) in dem ersten Betriebsmodus Gas aus der Katalyseanordnung (110) zugeführt wird und Gas entnommen wird, das der Rektifikationsanordnung (130) zugeführt wird, dem Adsorberbehälter (201, 202) in dem zweiten Betriebsmodus Gas aus dem anderen Adsorberbehälter (201, 202) zugeführt wird und Gas entnommen wird, das der Rektifikationsanordnung (130) zugeführt wird, dem Adsorberbehälter (201, 202) in dem dritten Betriebsmodus ein Regeneriergas (R) zugeführt wird und Gas entnommen wird, das nicht der Rektifikationsanordnung (130) zugeführt wird, dem Adsorberbehälter (201, 202) in dem vierten Betriebsmodus Gas aus der Katalyseanordnung (110) zugeführt wird und Gas entnommen wird, das dem anderen Adsorberbehälter (201, 202) zugeführt wird. Eine entsprechende Anlage (100) wird ebenfalls vorgeschlagen.

The present invention relates to a heat exchanger (200), comprising a heat exchanger block (205), wherein a distance from a first end position (215) of the heat exchanger block (205) to a second end position (225) of the heat exchanger block (205) in a longitudinal direction corresponds to a height of the heat exchanger block (205); wherein at least one first header (211, 212) is covering a first end section (210) of the heat exchanger block (205) and/or is arranged adjacent to the first end position (215) outside of the heat exchanger block (205) and wherein at least one second header (221, 222) is covering a second end section (220) of the heat exchanger block (205) and/or is arranged adjacent to the second end position (225) outside of the heat exchanger block (205); wherein the heat exchanger (200) further comprises at least one heat transfer unit (250, 260) configured to introduce heat into the heat exchanger block (205) over a predefined first area (255) of the heat exchanger block (205) or configured to extract heat out of the heat exchanger block (205) over a predefined second area (265) of the heat exchanger block (205); wherein a respective first distance in the longitudinal direction of the predefined first area (255) to the first end position (215) of the heat exchanger block (205) corresponds to at least 5% of the height of the heat exchanger block (205) and the predefined first area (255) is located outside the first end section (210) and/or wherein a respective second distance in the longitudinal direction of the predefined second area (265) to the second end position (225) of the heat exchanger block (205) corresponds to at least 5% of the height of the heat exchanger block (205) and the predefined second area (265) is located outside the second end section (220).

This air separation plant and the respective process comprise a main heat exchanger (10) consisting of block(s) of a first or a second block type (11, 12), each block of a block type has the same internal structure concerning the two main passage groups (36, 40; 37, 41) for warming two main returns streams, the blocks of the first and second types both comprising one or more identical or similar passage groups for cooling feed air (15a, 15b) directed to the distillation system, the block(s) of the first type (11) comprising a passage group for guiding and warming pumped liquid oxygen (36, 37) and a passage group for impure gaseous nitrogen (31, 13) withdrawn from an intermediate point of the low-pressure column (18b), the block(s) of the second type (12) comprising a passage group for guiding and warming pumped liquid oxygen (36, 37) and a passage group for gaseous nitrogen (22, 23, 14) withdrawn from the top of the low-pressure column (18b), but no passage for impure gaseous nitrogen (31, 13) withdrawn from an intermediate point of the low-pressure column (18b).

An air separation unit (100) is provided, the air separation unit (100) comprising a column system (10) including a pressure column (11) configured to be operated at a first pressure level and a low pressure column (12) configured to be operated at a second pressure level below the first pressure level and a Joule-Thomson expansion unit (7) configured to expand a Joule-Thomson stream (101) of compressed, pre-purified and cooled feed air into a phase-separating unit (200) provided in the pressure column (11). The phase-separating unit (200) is provided in the pressure column (11) beneath a separation section (16) and the phase-separating unit (200) comprises a roof structure (201) configured to restrict an inflow of cryogenic liquid draining from the separation section (16) into the phase-separating unit (200). A corresponding method is also provided.

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