WO2017217940A1 - Sécheur d'air comprimé avec rinçage additionnel et sa connexion dans un système pneumatique - Google Patents

Sécheur d'air comprimé avec rinçage additionnel et sa connexion dans un système pneumatique Download PDF

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Publication number
WO2017217940A1
WO2017217940A1 PCT/SK2017/050003 SK2017050003W WO2017217940A1 WO 2017217940 A1 WO2017217940 A1 WO 2017217940A1 SK 2017050003 W SK2017050003 W SK 2017050003W WO 2017217940 A1 WO2017217940 A1 WO 2017217940A1
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WO
WIPO (PCT)
Prior art keywords
air
dryer
compressed air
stream
hollow fibers
Prior art date
Application number
PCT/SK2017/050003
Other languages
English (en)
Inventor
Karol MRNA
Original Assignee
Ekom Spol. S R.O.
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 Ekom Spol. S R.O. filed Critical Ekom Spol. S R.O.
Publication of WO2017217940A1 publication Critical patent/WO2017217940A1/fr

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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
    • B01D53/268—Drying gases or vapours by diffusion
    • 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
    • B01D53/22—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 diffusion
    • B01D2053/221—Devices
    • B01D2053/223—Devices with hollow tubes
    • B01D2053/224—Devices with hollow tubes with hollow fibres

Definitions

  • This invention relates to compressed air with additional rinse and its connection into pneumatic system.
  • a membrane dryer is used for the humidity removal from compressed air.
  • Humid compressed air after passing throughout the air filter, enters into a bundle of hollow fibers.
  • the walls of these fibers consist of a membrane with selective permeability for water vapor.
  • Part of the dried air which is leaving in form of direct stream from the hollow fibers bundle, is deviated and, after the expansion, used for the rinsing of the fibers outer surface by the mean of rinsing air stream.
  • the rinsing air stream direction is contrary to the compressed air flow direction inside the hollow fibers. Due to the water vapor partial pressure difference, water molecules migration from the compressed air stream into the rinsing air stream is achieved.
  • the principle of this equipment is known and described in US Patent 5,002,590.
  • a disadvantage of this solution consists in its efficiency, which is limited by the quantity of the air used for the air dryer hollow fibers rinsing. At given pressure, this quantity is almost constant and it does not depend on the air flow rate throughout the dryer. Therefore, the dryer efficiency decreases when the air flow rate is increased.
  • the above-mentioned disadvantages of the compressed air dryer which consists of the inflow section, housing and output section, while the hollow fibers bundle is located inside the dryer housing, are eliminated significantly at the dryer according to this invention.
  • the substantial fact of this invention is that a part of the direct stream of the humid compressed air with lower dew point is split into two air branches at least. A nozzle is integrated into the first branch while a relief valve is integrated into the second branch. Both branches are connected with holes on the housing. These holes are located close to the output section.
  • the rinsing air stream resulting from the mixture of both of these branches is acting from outside on the hollow fibers in the direction from the output section towards the inflow section. It is exiting into the atmosphere via one hole at least. This hole is located close to the dryer inflow section.
  • the second air branch consists of the relief valve output connection. This valve ensures constant pressure at the dryer output, on the second housing inflow hole.
  • the rinsing air stream consists of the mixture of the expanded air stream downstream the nozzle and the excess air stream downstream the relief valve.
  • the noise generated during the rinsing air expansion and flowing before the air exits into the atmosphere throughout the holes is damped by the housing directly.
  • the hollow fibers are inside the housing; therefore, no additional dampers are required.
  • the essence of the connection of the compressed air dryer with additional rinse into the pneumatic system consisting of input filter for elimination of undesired impurities, compressor for the compression of the inducted atmospheric air, cooler for the compressed air cooling, air filter with a vessel for the removal of the condensate, the proper air dryer, non-return valve preventing the compressed air reverse flow, air box for the compressed air gathering and relief valve to protect the equipment against increased air pressure, is based in the connection of the proper air dryer with the drying module between the air filter with the vessel for the condensate removal and the non-return valve.
  • the first branch with the nozzle is connected to the drying module and the second branch with the relief valve.
  • the mixture resulting in the rinsing air stream from the both air branches is acting on the hollow fibers from outside and in a direction opposite to the air direct stream.
  • the solution with the air box is advantageous, for example, at those applications where the demand on the air flow rate leaving the dryer is changing in cyclical mode.
  • An air box with sufficient capacity is compensating the dryer efficiency differences caused by the change of the rinsing air quantity.
  • Air dryer 1 according to Fig. 1 consists of inflow section 21 , housing 23 containing the hollow fibers bundle 3 and output section 22 .
  • An input hole 211 is located on the inflow section; on the output section, an output hole 221 for the flow of the direct air stream 31 is located.
  • Input holes 231 and 232 as well as the atmospheric holes 233 are made on the housing.
  • Humid compressed air enters via input hole 211 into the inflow section 21 , enters into the hollow fibers 3 and is passing throughout their inner area in form of direct air stream 31 into the output section 22 . Compressed air with lowered dew point is leaving the output hole 221 . After the direct air stream 31 passes throughout the hollow fibers, the first air branch 222 and the second air branch 223 are created. This separation may take place either already in the dryer output section 22 or downstream the output hole 221 as shown in Fig. 1. Part of the air deviated into the first branch 222 is expanding after it passes throughout the nozzle 4 , entering via hole 231 into the housing 23 . There, the air is used for the rinsing of the hollow fibers 3 outer surface.
  • the air deviated into the second branch 223 is passing throughout the non-return valve 5 , which ensures a constant pressure downstream the dryer inside the pneumatic system. After the air passes throughout the relief valve 5 , it expands and enters via hole 232 into the housing 23 . There, the air is utilized as an additional rinse for the hollow fibers 3 outer surface.
  • both air conditioned in the first branch 222 and in the second branch 223 are mixed and streaming jointly as a rinsing stream 32 around the hollow fibers 3 outer surface in a direction opposite to the direct air stream 31 inside the hollow fibers, exiting via holes 233 into the atmosphere.
  • the housing 23 containing the hollow fibers bundle 3 creates a damper for the noise generated by the expansion and flow of the rinsing air stream 32 before it exits via holes 233 into the atmosphere.
  • FIG. 2 An example of pneumatic system connection with compressed air dryer with additional rinse is shown in Fig. 2.
  • the pneumatic system in this connection consists of input filter 9 , compressor 8 , cooler 7 , air filter 6 , air dryer 1 , non-return valve 11 , air box 10 and safety valve 12 .
  • the air dryer 1 with additional rinse is connected between the air filter 6 and non-return valve 11 .
  • the air taken by the compressor 8 via input filter 9 is cooled down after the compression in the cooler 7 , and filtered in the air filter 6 as shown in Fig. 1.
  • the direct air stream 31 enters the drying module 24 .
  • the drying module 24 consists of hollow fibers bundle 3 placed in the housing 23 as shown in Fig. 1.
  • the air for the air dryer 1 additional rinse is passing via relief valve 5 , which keeps constant pressure downstream the dryer in the pneumatic system, and via nozzle 4 ; after that, it is mixed, and in form of rinsing air stream 32 continues flowing into the drying module 24 , where it acts from outside on the hollow fibers 3 as shown in Fig. 1, and exits via holes 233 into the atmosphere.
  • the condensate from the air filter 6 is released into the vessel 61 .
  • the air from the air dryer 1 is passing throughout the non-return valve 11 into the air box 10 , which a safety valve 12 is connected to.
  • Example 2 This is identical with Example 2 except that the air filter 6 is not placed upstream the air dryer 1 , but it forms a part of the dryer inflow section 21 (see Fig.1).

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 Using Semi-Permeable Membranes (AREA)
  • Drying Of Gases (AREA)

Abstract

L'invention porte également sur un sécheur d'air comprimé (1) avec rinçage additionnel constitué d'une section d'entrée (21) et d'une section de sortie (22). Entre ces sections, à l'intérieur du boîtier (23), il y a un faisceau de fibres creuses (3), dont la partie interne passe un flux direct (31) de l'air comprimé humide; cet air est divisé en aval de la section de sortie (22) vers au moins deux ramifications d'air (222 5223); la première dérivation d'air (222) comprend une buse (4), la seconde (223) comprend une soupape de décharge (5), et l'air est mélangé en aval de ceux-ci; le flux d'air de rinçage mélangé (32) provenant des deux ramifications d'air (222 and 223) agit de l'extérieur sur les fibres creuses (3) dans la direction opposée à celle du flux d'air direct (31) et sort dans l'atmosphère par l'intermédiaire de trous (233). La connexion du sécheur à un système pneumatique, où entre le filtre d'air (6) avec le récipient (61) pour l'élimination du condensat et le clapet de non-retour (11), le sécheur d'air approprié (1) avec le module de séchage (24) est connecté. Le module de séchage (24) est constitué de fibres creuses (3) placées à l'intérieur du boîtier (23), à laquelle est raccordée la première branche (222) avec la buse (4) et la seconde branche (223) avec une soupape de décharge (5).
PCT/SK2017/050003 2016-06-17 2017-06-15 Sécheur d'air comprimé avec rinçage additionnel et sa connexion dans un système pneumatique WO2017217940A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SK500392016A SK288817B6 (sk) 2016-06-17 2016-06-17 Sušič stlačeného vzduchu s prídavným oplachom a jeho zapojenie do pneumatického systému
SKPP50039-2016 2016-06-17

Publications (1)

Publication Number Publication Date
WO2017217940A1 true WO2017217940A1 (fr) 2017-12-21

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ID=59593148

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Application Number Title Priority Date Filing Date
PCT/SK2017/050003 WO2017217940A1 (fr) 2016-06-17 2017-06-15 Sécheur d'air comprimé avec rinçage additionnel et sa connexion dans un système pneumatique

Country Status (2)

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SK (1) SK288817B6 (fr)
WO (1) WO2017217940A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5002590A (en) 1989-09-19 1991-03-26 Bend Research, Inc. Countercurrent dehydration by hollow fibers
FR2751894A1 (fr) * 1996-07-31 1998-02-06 Jacob Jacques Procede de fabrication de gaz comprime sec, notamment d'air comprime sec, dispositif pour sa mise en oeuvre et son application a usage medical
EP0903173A2 (fr) * 1997-09-10 1999-03-24 Hygrama Ag Sécheur à membrane pour air humide
WO2001034280A1 (fr) * 1999-11-12 2001-05-17 Porous Media Corporation Systemes a gaz comprimes utilisant un deshydrateur d'air a membrane a pression variable, et mode de mise en oeuvre
US20040194483A1 (en) * 2003-04-04 2004-10-07 Dean Hoyt Processes for controlling regenerative sweep air for membrane systems
US20090151557A1 (en) * 2007-12-18 2009-06-18 Smc Corporation Dehumidification system and dehumidification method in booster piping

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5002590A (en) 1989-09-19 1991-03-26 Bend Research, Inc. Countercurrent dehydration by hollow fibers
FR2751894A1 (fr) * 1996-07-31 1998-02-06 Jacob Jacques Procede de fabrication de gaz comprime sec, notamment d'air comprime sec, dispositif pour sa mise en oeuvre et son application a usage medical
EP0903173A2 (fr) * 1997-09-10 1999-03-24 Hygrama Ag Sécheur à membrane pour air humide
WO2001034280A1 (fr) * 1999-11-12 2001-05-17 Porous Media Corporation Systemes a gaz comprimes utilisant un deshydrateur d'air a membrane a pression variable, et mode de mise en oeuvre
US20040194483A1 (en) * 2003-04-04 2004-10-07 Dean Hoyt Processes for controlling regenerative sweep air for membrane systems
US20090151557A1 (en) * 2007-12-18 2009-06-18 Smc Corporation Dehumidification system and dehumidification method in booster piping

Also Published As

Publication number Publication date
SK500392016A3 (sk) 2018-01-04
SK288817B6 (sk) 2021-01-13

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