EP2825284A2 - Procédé et dispositif d'adsorption modulée en pression - Google Patents

Procédé et dispositif d'adsorption modulée en pression

Info

Publication number
EP2825284A2
EP2825284A2 EP13714220.4A EP13714220A EP2825284A2 EP 2825284 A2 EP2825284 A2 EP 2825284A2 EP 13714220 A EP13714220 A EP 13714220A EP 2825284 A2 EP2825284 A2 EP 2825284A2
Authority
EP
European Patent Office
Prior art keywords
swing adsorption
pressure swing
adsorption device
valves
sensor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP13714220.4A
Other languages
German (de)
English (en)
Inventor
Ralf Hacker
Manfred Nagel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Airtech Stickstoff GmbH
Original Assignee
Airtech Stickstoff GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Airtech Stickstoff GmbH filed Critical Airtech Stickstoff GmbH
Publication of EP2825284A2 publication Critical patent/EP2825284A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B01D53/047—Pressure swing adsorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/40—Further details for adsorption processes and devices
    • B01D2259/40007—Controlling pressure or temperature swing adsorption
    • B01D2259/40009—Controlling pressure or temperature swing adsorption using sensors or gas analysers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/40—Further details for adsorption processes and devices
    • B01D2259/402—Further details for adsorption processes and devices using two beds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/40—Further details for adsorption processes and devices
    • B01D2259/41—Further details for adsorption processes and devices using plural beds of the same adsorbent in series

Definitions

  • the present invention relates to a pressure swing adsorption (PSA) method and apparatus as described by the preambles of the independent claims.
  • PSA pressure swing adsorption
  • the pressure swing adsorption is a physical process for the separation of gas mixtures under pressure by adsorption.
  • special porous materials such as zeolites, activated carbon o.a. used as adsorbent.
  • the separation effect can be based on two different principles: the separation due to the equilibrium adsorption or the separation due to the molecular sieve effect. In the first case, one of the components to be separated is more strongly adsorbed than another. As a result, an enrichment of the less adsorbed component takes place in the gas phase. In the second case, certain molecules penetrate the porous structure of the adsorbent more quickly. Will that be
  • Adsorbent now flows through the gas mixture in a reactor bed, so the component that penetrates worse in the pores, less time to pass, so rather comes to the outlet of the reactor bed.
  • the gas is introduced under elevated pressure of usually about 6-10 bar in a fixed bed reactor, which is filled with the adsorbent, so that it is flowed through.
  • One or more components of the mixture the so-called heavy component
  • the so-called "light component” can be removed.
  • the adsorbent bed is largely saturated, and part of the heavy component also comes out.
  • valves are used to switch the process so that the outlet for the light component is closed and an outlet for the heavy component suddenly opens. This is accompanied by a rapid pressure reduction.
  • the adsorbed gas is desorbed again and can be recovered at the outlet or purge valve.
  • Two reciprocally charged and discharged adsorbers enable continuous operation. To expel the supernatant of desorbed heavy component from the adsorber, can with a proportion rinse the desired product to avoid contamination.
  • VSA Vauum Swing Adsorption
  • VPSA Vauum Pressure Swing Adsorption
  • the purity of the product obtained depends on the speed and the duration of the flow through the adsorbent, both of which can be regulated either via the flow velocity or the mass flow.
  • Pressure swing systems of the type described are particularly suitable for the production of pure gases in places where the supply of gases by tankers or the like is out of the question or difficult. In general, on-site production is cheaper, especially when it comes to lower purities, because no transport is necessary.
  • a problem of conventional systems for carrying out this method is that they are designed for a certain delivery quantity and purity of the product, this delivery quantity is not adjustable afterwards. Thus, if a smaller amount or no product, e.g. N2 is removed, it is flushed out during the rapid pressure drop and released into the ambient air.
  • the supply air for the process or the method as described above is supplied by industry-standard compressors.
  • the ambient conditions change as a result of temperature changes, changes in weather, etc.
  • the amount of supply air required changes which must be fed into the process in order to obtain the required product quantity or purity.
  • compressors are devices that are best driven constantly in the same operating range to operate efficiently.
  • the compressor In order to vary the amount of compressed air supplied, as the demand for supply air for the pressure swing storage method changes, the compressor must either be frequency controlled or, in the worst case, even run in interval mode to charge a pressure accumulator upstream of the compressed air reservoir. Both are not conducive to the efficiency and yield of the company.
  • a pressure swing adsorption device with at least two solid bed containers filled with an adsorbent, which are connected to one another by means of a corresponding line mimic, is provided, wherein, according to the invention, at least one downstream of the solid bed containers sor is provided for measuring the purity of the product, wherein the solid-bed containers are provided with switching-time controllable inlet, outlet, Querström- and flushing valves and wherein an electronic control is provided which is communicatively connected to the sensors and the controllable valves and these respects their switching times and duration depending on at least the response of the purity sensor controls.
  • the pressure swing adsorption device depending on the desired product quantity or quality by changing the switching times or the switching time of the respective valves and thus the targeted influencing of the solids container flowing through the mass flow of its components controlling decomposing gas.
  • valves recirculation connections are provided, which connect the Feststoffbett individualem downstream area with the Feststoffbett individualem upstream Zu Kunststoff the device, wherein also during operation, an excess portion of the product can be recirculated.
  • valves of the recirculation lines are also connected switching time controllable and communicatively connected to the electronic control.
  • the pressure swing adsorption an air dryer, more preferably another pressure swing adsorption device is connected upstream, wherein between the purge valve at least one of the subsequent pressure swing adsorption devices and the air outlet of the air dryer a valve-controlled connections is provided, whereby the valves of this connection are switching time controllable and communicatively connected to the electronic control.
  • the air dryer is also a pressure swing adsorption device and this is followed by a humidity sensor, which is connected to the electronic control.
  • a sensor for detecting the ambient air quality can be provided, which is also communicatively connected to the controller
  • a valve node which receives most, if not all, conduction paths of the device.
  • the pathways of the main air, i. the pressure swing adsorption device fed air, and the purge stream, i. usually the nitrogen flow are summarized in this valve node.
  • valve node according to the invention is preferably made of structural or stainless steel, wherein the valve seats may also be preferably made of stainless steel and are screwed into the valve bodies.
  • control bores may be provided in the valve node, which serve to record manometers, to be able to locate any leaks can.
  • the present invention also relates to a corresponding method for operating a pressure swing adsorption device of the type described, wherein the electronic control, taking into account the data of all existing sensors as described above can control the valves of the device to the achieve desired product quantity and quality and / or to keep a compressor for supplying the compressed air for the device in its optimal working range.
  • Fig. 1 is a schematic representation of a preferred embodiment of the invention
  • Fig. 2 is a perspective view of a valve block for use in the embodiment of Fig. 1; such as
  • FIG. 1 shows, in a schematic manner, a pressure swing adsorption device with two solid bed containers 2a and 2b filled with an adsorbent, which containers are connected to one another by means of a corresponding line mimic.
  • the pressure swing adsorption device is supplied by a compressor 20 with compressed air, wherein in the illustrated embodiment, a cooler 22 is still provided, which cools the compressed air before it passes through an air dryer 24.
  • a compressor 20 with compressed air
  • a cooler 22 is still provided, which cools the compressed air before it passes through an air dryer 24.
  • the solids bed containers 2a and 2b are followed by a product store 10 in which the desired product can be buffered.
  • the solid bed containers 2a and 2b is followed by a sensor 33 for measuring the purity of the product in the illustrated embodiment.
  • the solids bed containers 2 a and 2 b are also provided with inlet valves 4 a and 4 b which can be controlled in each case by switching-time control, outlet valves 6 a and 6 b and flush valves 8 a and 8 b.
  • an electronic control 12 is provided, which is communicatively connected to the sensor 33 and the controllable valves 4a, 4b, 6a, 6b, 8a and 8b and controls these with regard to their switching times and durations depending on at least the response of the cleanliness sensor 33, depending on the given the desired purity and amount of the product to the electronic control 12th
  • a recirculation connection 26 which is likewise provided with at least one switching-time-controllable valve 28, is provided in the system shown. This connects the area of the plant, which is downstream of the solid bed container 2 a and 2 b, with the area of the plant which is upstream of the solid bed container 2 a and 2 b, this area being arranged immediately in front of the compressor 20 in the illustrated embodiment.
  • the valve 28 of the recirculation connection 26 is also communicatively connected to the electronic controller 12, so that this can also be switched depending on the already achieved purity of the product, which is measured via the sensor 33.
  • valve-controlled connections 30 are provided, wherein the valves 34 and 35 of this connection 30 switching time controllable and communicative with the electronic control 12 are connected.
  • the air dryer 24 is further provided with a humidity sensor 16 which is also connected to the electronic controller 12 so that it can switch the valves 34 and 35 according to need and humidity.
  • a sensor 36 is still provided for detecting the ambient air quality, which is also communicatively connected to the controller 12.
  • valve block 40 for use in the embodiment of FIG. 1. It can be seen that in a compact block, the valves VI to V5 are summarized and inputs E2 and E2 and outputs AI, A2 and A3, which can each be connected to the corresponding inlets and outlets of the device.
  • FIG. 3a and 3b each show a section through the valve block of Fig. 2, wherein the Fig. 3a shows a section through the valves VI and V2 and Fig. 3b shows a section through the output A2.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Of Gases By Adsorption (AREA)
  • Treatment Of Liquids With Adsorbents In General (AREA)

Abstract

L'invention concerne un dispositif d'adsorption modulée en pression comportant au moins deux récipients à lit solide remplis d'un adsorbant, qui sont interconnectés au moyen d'un réseau de conduites correspondant, au moins un capteur couplé en aval des récipients à lit solide et servant à mesurer la pureté du produit étant prévu, ledit dispositif se caractérisant en ce que les récipients à lit solide sont munis de soupapes d'admission, de sortie et de rinçage qui peuvent être régulées en temps de réponse. Il existe une commande électronique reliée en communication avec le capteur et les soupapes régulables qu'elle régule en termes de temps et de durée de réponse en fonction d'au moins la réponse du capteur de pureté
EP13714220.4A 2012-03-14 2013-03-14 Procédé et dispositif d'adsorption modulée en pression Withdrawn EP2825284A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201210005108 DE102012005108A1 (de) 2012-03-14 2012-03-14 Verfahren und Vorrichtung zur Druckwechsel-Adsorption
PCT/EP2013/055282 WO2013135840A2 (fr) 2012-03-14 2013-03-14 Procédé et dispositif d'adsorption modulée en pression

Publications (1)

Publication Number Publication Date
EP2825284A2 true EP2825284A2 (fr) 2015-01-21

Family

ID=48047981

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13714220.4A Withdrawn EP2825284A2 (fr) 2012-03-14 2013-03-14 Procédé et dispositif d'adsorption modulée en pression

Country Status (3)

Country Link
EP (1) EP2825284A2 (fr)
DE (1) DE102012005108A1 (fr)
WO (1) WO2013135840A2 (fr)

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU571615B2 (en) * 1983-12-15 1988-04-21 Bergwerksverband Gmbh Pressure swing adsorbtion of highly adsorbable components
DE3543468A1 (de) * 1985-12-09 1987-06-11 Linde Ag Druckwechseladsorptionsverfahren
JPH01104327A (ja) * 1987-10-17 1989-04-21 Tokico Ltd 気体分離装置
US4915711A (en) * 1989-05-18 1990-04-10 Air Products And Chemicals, Inc. Adsorptive process for producing two gas streams from a gas mixture
US5258056A (en) * 1991-09-27 1993-11-02 The Boc Group, Inc. PSA system with product turndown and purity control
GB2273252B (en) * 1992-12-09 1996-09-18 Boc Group Plc The separation of gaseous mixtures
JP3385053B2 (ja) * 1992-12-22 2003-03-10 大陽東洋酸素株式会社 希ガスの高収率回収精製方法及び希ガスの高収率回収精製装置
GB9421308D0 (en) * 1994-10-22 1994-12-07 Domnick Hunter Ltd Nitrogen generation process
JP4355834B2 (ja) * 1999-08-20 2009-11-04 独立行政法人 日本原子力研究開発機構 ガス成分の分離除去または回収する方法および装置
US6251164B1 (en) * 1999-08-27 2001-06-26 Praxair Technology, Inc. Fluid separation process and separation system therefor
US6361584B1 (en) * 1999-11-02 2002-03-26 Advanced Technology Materials, Inc. High temperature pressure swing adsorption system for separation of oxygen-containing gas mixtures
FR2841153B1 (fr) * 2002-06-21 2004-07-23 Air Liquide Procede de regulation d'une unite de traitement, par adsorption a modulation de pression, d'au moins un gaz de charge
DE102004026650B4 (de) * 2004-06-01 2007-11-29 DRäGER AEROSPACE GMBH Verfahren zum Betreiben einer Luftzerlegungsanlage zur Gewinnung von Sauerstoff an Bord eines Flugzeugs
US8029603B2 (en) * 2009-01-23 2011-10-04 Air Products And Chemicals, Inc. Pressure swing adsorption cycle for ozone production

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2013135840A3 *

Also Published As

Publication number Publication date
DE102012005108A1 (de) 2013-09-19
WO2013135840A3 (fr) 2013-12-27
WO2013135840A2 (fr) 2013-09-19

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