EP2387449A1 - Dispositif de séparation par sorption d'un courant gazeux, présentant un tube vortex pour la régénération - Google Patents

Dispositif de séparation par sorption d'un courant gazeux, présentant un tube vortex pour la régénération

Info

Publication number
EP2387449A1
EP2387449A1 EP10702595A EP10702595A EP2387449A1 EP 2387449 A1 EP2387449 A1 EP 2387449A1 EP 10702595 A EP10702595 A EP 10702595A EP 10702595 A EP10702595 A EP 10702595A EP 2387449 A1 EP2387449 A1 EP 2387449A1
Authority
EP
European Patent Office
Prior art keywords
regeneration
sorbent
gas stream
gas
gas flow
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Withdrawn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
EP10702595A
Other languages
German (de)
English (en)
Inventor
Wolfgang Bongartz
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.)
Donaldson Filtration Deutschland GmbH
Original Assignee
Donaldson Filtration Deutschland 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 Donaldson Filtration Deutschland GmbH filed Critical Donaldson Filtration Deutschland GmbH
Publication of EP2387449A1 publication Critical patent/EP2387449A1/fr
Withdrawn legal-status Critical Current

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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
    • B01D53/26—Drying gases or vapours
    • B01D53/261—Drying gases or vapours by 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
    • B01D2259/40011—Methods relating to the process cycle in pressure or temperature swing adsorption
    • B01D2259/40043—Purging
    • B01D2259/4005—Nature of purge gas
    • B01D2259/40052—Recycled product or process gas
    • B01D2259/40054—Recycled product or process gas treated before its reuse
    • 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
    • B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
    • B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
    • B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
    • 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
    • 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
    • B01D53/0462—Temperature swing adsorption

Definitions

  • the invention relates to a device for the sorptive separation of a gas stream and in particular to a sorption dryer for drying a gas.
  • Sorption dryer generally serve to moisture from a gas and in particular a compressed gas, such as. B. to remove compressed air.
  • a compressor draws in ambient air and compresses it.
  • the compression of the sucked ambient air leads to a moisture supersaturation of the compressed air.
  • Part of this moisture condenses the aftercooler of the compressor and is discharged via separation systems from the compressed air system.
  • the cooling of the compressed air in the piping system between the compressor and the consumer results in further formation of condensate. This can lead to negative side effects in the subsequent uses of the compressed air, which can cause a high maintenance or quality losses.
  • Known Sorptionstrockner generally have two containers in which desiccant (sorbent) - often in the form of a bed - is arranged. Adsorptive desiccants are frequently used, and absorptive desiccants are also used become.
  • the two containers are connected in parallel to each other by conduits and respectively to the inlet of the gas to be dried and the outlet of the dried gas.
  • the flow path of the gas is controlled by valves.
  • the control of the valves is handled by a control unit.
  • the control of the valves is designed so that always a container is traversed by the gas to be dried. In this, the gas is dried by means of the sorbent in the container. In this phase, this container is thus in a sorption phase.
  • the other container is (usually) flowed through in the opposite direction by a portion of the dried gas in order to dry, ie to regenerate, the sorbent saturated during a previous sorption phase.
  • This container is thus in the regeneration phase.
  • the sorbent is dried without external supply of heat energy, that is, only by a partial flow of the pre-dried gas, it is a so-called cold regeneration.
  • it is necessary to control the valves in the inlet and outlet lines so that the container that was previously in the sorption phase is regenerated and the container that has been previously regenerated, now is used for drying the gas.
  • the regeneration of the container is effected by a branched off from the flow of the dried gas substream.
  • the diversion of this partial flow is usually carried out by means of a throttle element, for example a throttle valve, by which the amount of the partial flow is regulated, at the same time the (regeneration) gas is lowered to the pressure prevailing in the container provided for the regeneration pressure level.
  • a throttle element for example a throttle valve
  • the (regeneration) gas is lowered to the pressure prevailing in the container provided for the regeneration pressure level.
  • a cold adsorbent can not be effectively regenerated, so that a residual load of moisture is generally retained.
  • the proportion of residual charge must be compensated by additional sorbent.
  • this can lead to an increase in production and maintenance costs.
  • the warm regeneration of a sorption dryer is known from the prior art.
  • the sorption container located in the regeneration phase is regenerated by air, which was heated by supplying external energy.
  • the air can either be the partial flow of the dried compressed air; however, ambient air can also be used.
  • electrical heaters are used regularly.
  • Devices for the sorptive separation of a gas stream are used not only for drying a gas and in particular compressed air, but also for the selective decomposition of gas mixtures under pressure by means of the pressure swing adsorption (PSA) method.
  • PSA pressure swing adsorption
  • the present invention seeks to provide an improved device for sorptiven separating a gas stream.
  • a device should be specified, which is characterized by an improved regeneration of the sorbent.
  • the basic idea of the invention is to use a vortex tube (according to Ranque and Hilsch) to preheat the regeneration gas stream in a device for sorptively separating a gas.
  • Vortex tubes (according to Ranque and Hilsch), which are also referred to as vortex tubes, are well known in the art with respect to their structure and operation.
  • a compressed gas flow is generally introduced tangentially into a tubular main body of the vortex tube, wherein a separation of the compressed gas flow into a hot gas flow and a cold gas flow takes place within the main body.
  • the two gas flows leave the tubular body of the vortex tube at its two open ends.
  • the physical background regarding the separation of the compressed gas stream into a hot gas and a cold gas stream are not fully understood.
  • a variety of vortex tubes are available from several suppliers, the function of which is secured and the interpretation of which is based essentially on empirical tests.
  • An apparatus for the sorptive separation of a gas accordingly has at least one sorption container, which is filled with a sorbent, as well as inlets and outlets, by means of which the gas stream to be separated is passed through the sorbent in a sorption phase of the sorption container for separation and by means of which a regeneration phase of the sorption container, a portion of the separated gas stream (regeneration gas stream) is passed through this for the regeneration of the sorbent.
  • the regeneration gas stream is converted into a hot regeneration gas stream and a cold regeneration gas stream before regeneration of the sorbent in a vortex tube. separated regeneration gas stream and at least the hot regeneration gas used to regenerate the sorbent.
  • the sorbent can be regenerated in the at least one sorption container with a regeneration gas stream whose temperature is above the temperature of a regeneration gas stream as used in the cold regeneration known from the prior art.
  • An increased temperature of the regeneration gas stream usually leads to a more effective regeneration of the sorbent, so that a total of less sorbent is needed to achieve a predetermined sorption potential.
  • the sorption container can be made smaller, whereby the device is more compact overall.
  • reducing the sorbent reduces production and maintenance costs.
  • the device according to the invention can be provided to mix the hot regeneration gas stream before the regeneration of the sorbent at least a portion of the cold regeneration gas flow again.
  • the average temperature of the regeneration gas stream is lowered, but at the same time the throughput of regeneration gas increases, whereby less of the gas previously extensively separated in the apparatus has to be diverted for the regeneration of the apparatus.
  • the proportion of the cold regeneration gas flow that should be remixed to the hot regeneration gas flow depends on the
  • Dispensing line for the cold regeneration gas flow with the aim to make on the way from the vortex tube to the mixing point, the heat absorption from the environment by the cold regeneration gas flow higher than the loss of thermal energy to the environment by the H adoptedregenerationsgas- ström.
  • a device according to the invention can consequently have the most effective possible insulation of the supply lines for the hot regeneration gas flow and as ineffective as possible isolation of the supply line for the cold regeneration gas flow.
  • the cold regeneration gas stream is preheated by the gas to be separated.
  • This is on the one hand associated with the advantage that a preheating of the KaIt regeneration gas stream can be done without a dependent on the supply of external energy heater.
  • the temperature of the gas stream to be separated can thereby be lowered, which can lead to condensation of the component of the gas stream to be separated already before it enters the sorption container. Due to the consequent relief of the sorbent, either the amount of sorbent in the sorption containers can be reduced or the amount of gas to be separated, which can be separated before regeneration of the sorption container, increased. This can in particular reduce the operating costs.
  • the device according to the invention is particularly suitable for separating water (vapor) from a gas (for example compressed air), i. for drying a gas or also for selective decomposition of gas mixtures under pressure by means of the pressure change
  • a gas for example compressed air
  • PSA Pressure Swing Adsorption
  • FIG. 1 in a greatly simplified illustration of the structure and the flow pattern in a device according to the invention
  • Fig. 2 is a vortex tube, as can be used in the apparatus of Fig. 1, in a sectional view.
  • Fig. 1 shows a greatly simplified representation of an inventive device for sorptiven separating a gas. Specifically, this is an adsorption dryer for compressed air.
  • the adsorption dryer comprises two adsorption tanks
  • adsorption vessel 1, 2 which are filled with an adsorbent (not shown). Furthermore, a heat exchanger 3, a vortex tube 4, a pre-5 and a post-filter 6 and a control unit 7 are provided.
  • the control unit 7 serves to control a multiplicity of valves which are integrated into a line system of the device.
  • the compressed air to be dried is fed to the adsorption dryer at position I.
  • this has an average temperature of about 35 ° C.
  • the compressed air then flows through the heat exchanger 3, the functions of which will be described below.
  • the compressed air then flows through the pre-filter 5, in which liquid aerosols (oil and water) and particles are filtered out of the compressed air and the compressed-air condensate is removed from the system.
  • the compressed air is fed via a first controllable shuttle valve 8 one of the two adsorption vessel 1, 2. In the case illustrated, this is the left of the two adsorption vessels 1, 2 shown in FIG. 1.
  • the compressed air flows through the adsorbent located in the left adsorption vessel 1, the moisture contained in the compressed air being adsorbed by the adsorbent.
  • the compressed air thus dried leaves the left adsorption vessel 1 at the position II and flows via a second controllable shuttle valve 9 to a branch IM.
  • a branch IM a (small) partial flow of the dried compressed air is branched off and supplied to the vortex tube 4.
  • the (larger) partial flow of the dried compressed air after he has passed the post-filter 6, from the
  • the postfilter serves to separate solid particles (e.g., sorbent abrasion) from the gas stream.
  • a separation of the regeneration air flow (shown by the light arrows) in a hot air flow (dotted arrows) and a cold air flow (black arrows) takes place.
  • the hot air flow (about 40% of the regeneration air flow) leaves the vortex tube 4 at the position V, whereas the cold air flow leaves the vortex tube at the position VI.
  • the cold air flow which accounts for about 60% of the total regeneration air flow, in this case has an average temperature of about -1O 0 C.
  • the cold air stream then flows through the heat exchanger, where it is heated to an average temperature of 25 ° C.
  • a second (closed) shut-off valve 11 prevents the regeneration air from flowing into the left adsorption vessel 1.
  • the regeneration air stream which now has an average temperature of approximately 47 ° C., flows through the saturated adsorbent from top to bottom, the water adsorbed on the adsorbent flowing from the adsorbent Received regeneration air flow and discharged through a third shut-off valve 12 and a shut-off valve downstream muffler 13.
  • the third shut-off valve is actuated by the control unit 7 on the basis of the measured values of a pressure sensor 14.
  • the operation of the illustrated adsorption dryer is such that one of the adsorption tanks is then regenerated while the other adsorption tank is used for drying the compressed air.
  • the compressed air to be dried is fed via the first shuttle valve 8 to the respective other adsorption vessel and the shut-off valves are switched over accordingly.
  • the pre-regenerated adsorption tank is then used for drying the compressed air while the saturated adsorption tank is being regenerated.

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)
  • Drying Of Gases (AREA)
  • Separation Of Gases By Adsorption (AREA)

Abstract

L'invention concerne un dispositif de séparation par sorption d'un gaz, comprenant au moins un récipient à sorption (1, 2) qui est rempli d'un sorbant, et des conduites d'amenée et d'évacuation, via lesquelles, dans une phase de sorption du récipient à sorption, le courant gazeux à séparer est dirigé à travers le sorbant pour la séparation, et via lesquelles, dans une phase de régénération du récipient à sorption, une partie du courant gazeux séparé (courant gazeux de régénération) est dirigée dans celles-ci, pour la régénération du sorbant, le courant gazeux de régénération étant séparé en un courant gazeux de régénération chaud (V) et en un courant gazeux de régénération froid (VI) avant la régénération du sorbant dans un tube vortex (4), et au moins le courant gazeux de régénération chaud est utilisé pour la régénération du sorbant.
EP10702595A 2009-01-15 2010-01-15 Dispositif de séparation par sorption d'un courant gazeux, présentant un tube vortex pour la régénération Withdrawn EP2387449A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200910005156 DE102009005156A1 (de) 2009-01-15 2009-01-15 Vorrichtung zum sorptiven Trennen eines Gasstroms
PCT/EP2010/000207 WO2010081716A1 (fr) 2009-01-15 2010-01-15 Dispositif de séparation par sorption d'un courant gazeux, présentant un tube vortex pour la régénération

Publications (1)

Publication Number Publication Date
EP2387449A1 true EP2387449A1 (fr) 2011-11-23

Family

ID=42027678

Family Applications (1)

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EP10702595A Withdrawn EP2387449A1 (fr) 2009-01-15 2010-01-15 Dispositif de séparation par sorption d'un courant gazeux, présentant un tube vortex pour la régénération

Country Status (3)

Country Link
EP (1) EP2387449A1 (fr)
DE (1) DE102009005156A1 (fr)
WO (1) WO2010081716A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2586933T3 (es) * 2012-02-10 2016-10-19 Donaldson Filtration Deutschland Gmbh Dispositivo para el secado y filtrado de un gas
CN107349758A (zh) * 2015-03-21 2017-11-17 石家庄四药有限公司 医药级洁净压缩空气制备系统及方法
CN109173575A (zh) * 2018-09-14 2019-01-11 铜陵市天峰汽车维修服务有限责任公司 一种用于汽车喷漆室的空气净化器
EP3626327B1 (fr) * 2018-09-19 2023-11-01 Wagner Group GmbH Procédé d'inertisation et installation d'inertisation, en particulier destinés à la prévention des incendies, et utilisation d'une installation d'inertisation
CN111790362A (zh) * 2020-07-17 2020-10-20 杭州临安汉克森过滤设备有限公司 具有冷热切换涡流管换热机构的再生干燥机

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SU1679054A1 (ru) * 1988-09-28 1991-09-23 Всесоюзное научно-производственное объединение турбохолодильной, газоперекачивающей и газотурбинной техники Установка дл адсорбционной осушки газа
FR2726896B1 (fr) * 1994-11-10 1996-12-13 Air Liquide Installation et procede de separation des composants de l'air par distillation cryogenique
RU2157722C2 (ru) * 1997-10-30 2000-10-20 Открытое акционерное общество криогенного машиностроения (ОАО "Криогенмаш") Способ очистки и осушки газа и устройство для его осуществления

Non-Patent Citations (1)

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Title
See references of WO2010081716A1 *

Also Published As

Publication number Publication date
DE102009005156A1 (de) 2010-07-22
WO2010081716A1 (fr) 2010-07-22

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