WO1988006481A1 - Procede de recuperation de composes volatils dans l'atmosphere - Google Patents

Procede de recuperation de composes volatils dans l'atmosphere Download PDF

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Publication number
WO1988006481A1
WO1988006481A1 PCT/SE1988/000077 SE8800077W WO8806481A1 WO 1988006481 A1 WO1988006481 A1 WO 1988006481A1 SE 8800077 W SE8800077 W SE 8800077W WO 8806481 A1 WO8806481 A1 WO 8806481A1
Authority
WO
WIPO (PCT)
Prior art keywords
atmosphere
volatile compounds
cooled
air
water
Prior art date
Application number
PCT/SE1988/000077
Other languages
English (en)
Inventor
Karl-Erik Ungerholm
Original Assignee
Ingenjörsfirma Utilex
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 Ingenjörsfirma Utilex filed Critical Ingenjörsfirma Utilex
Publication of WO1988006481A1 publication Critical patent/WO1988006481A1/fr
Priority to DK564588A priority Critical patent/DK564588A/da
Priority to NO884610A priority patent/NO884610D0/no
Priority to KR1019880701356A priority patent/KR890700388A/ko
Priority to FI893999A priority patent/FI893999A0/fi

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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0033—Other features
    • B01D5/0036—Multiple-effect condensation; Fractional condensation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0033—Other features
    • B01D5/0039—Recuperation of heat, e.g. use of heat pump(s), compression
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0033—Other features
    • B01D5/0054—General arrangements, e.g. flow sheets
    • 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
    • B01D53/002—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 condensation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D8/00—Cold traps; Cold baffles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/80—Water
    • 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
    • B01D2259/40001—Methods relating to additional, e.g. intermediate, treatment of process gas
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency

Definitions

  • the present invention relates to a method for recovering volatile compounds other than water from the atmosphere evacuated from spaces, in which materials containing volatile compounds are manufactured, handled, stored or used. These volatile compounds have attracted much atten ⁇ tion as an inconvenience to the surroundings and as a menace to the environment. Besides there is an interest of recovering and reusing these compounds.
  • the invention is particularly related to solvents and dispersion vehicles for paint, printer's inc, adhesive cement, plastics and to cleaning and extracting liquids. Those compounds usually consist of hydrocarbons or halogenated hydrocarbons, but the invention also covers other volatile compounds for instance carbondisulfid.
  • the evacuated atmosphere usually contains comparatively small amounts of volatile compounds in a big amount of air and no effective and reliable method of cleaning such effluents has been found.
  • Trials have been made with combustion of the volatile compounds in sand beds or absorption in organic and inorganic absorption materials. It has also been proposed to condense the volatile compounds but with bad results as the humidity in the atmosphere di ⁇ turbes the process.
  • European patent In European patent
  • an atmosphere containing volatile compounds is first relieved from water vapour and then cooled to condensation of the volatile compounds other than water.
  • the condensate is recovered.
  • the present invention makes it possible to purify evacuated atmosphere of volatile compounds to any degree wanted in every special case.
  • the invention is based on cooling and condensation of the volatile compounds the residue of such compounds in the finally discharged atmosphere depends on the vapour pressure of the compounds in question at the end temperature that has been chosen.
  • the invention preferably comprises a first step in which the atmosphere is relieved from water vapour by adsorp ⁇ tion on a medium with a specific capability of adsorbing water and very small ability to adsorb other compounds.
  • adsorbents are well known in the art and is e.g. described in the US patent 3 078 635, which describes a molecular sieve consisting of a specially composed zeolite.
  • This first step is performed at room tempera- ture, which considerably reduces the risk that the adsorbing medium will be fouled by the volatile com ⁇ pounds. The adsorbent is then regenerated by hot air and reused.
  • a heat pump preferably of the type in which a gaseous medium is compressed and cooled to condensation, where ⁇ after the condensed medium by evaporation generates cold.
  • a heat pump preferably of the type in which a gaseous medium is compressed and cooled to condensation, where ⁇ after the condensed medium by evaporation generates cold.
  • a third step the atmosphere is further cooled until the rest of the volatile compounds are condensed.
  • the condensate is removed.
  • the cooling in the third step may - be effected by compressing dry gas, for example a small part of the atmosphere from the first step, cooling the compressed gas and then let it expand, preferably into the atmosphere in the third step.
  • This atmosphere is before that cooled by heat exchanging it with the atmosphere leaving the third step.
  • the volatile compounds ⁇ that have condensed in the second and third steps are separated and e.g. paint solvents may be recovered so pure that they can be reduced.
  • the invention gives a great freedom to chose very low temperatures.
  • the invention also makes it possible to recover the heat content of the evacuated atmosphere and to use it for heating purposes.
  • the use of a second step with a conventional heat pump working with a condensing medium and a third step using a small cooling machinery has proved to be a very advantageous combination in regard of the equipment needed and its reliability.
  • the figure is a schematic sketch of a preferred method for performing the invention.
  • Evacuated atmosphere containing volatile compounds in a first step passes means 4,5 for relieving it from water vapour, in a second step 12 it is cooled by a heat pump and in a third step 24 it is further cooled to condensation of the rest of the volatile compounds.
  • the condensates are removed 18,21.
  • Atmosphere evacuated from a space where volatile co - pounds are vaporised and which is of room temperature e.g. 18-20 C, is first conducted -to a filter 2 for removing solid and liquid contaminations e.g. paint residues and dust.
  • the atmosphere then is blown 3 through means performin ⁇ the different steps of the invention.
  • the first step has the purpose to remove as much water vapor from the atmosphere so that no difficulties owing to formation of ice may occur in the later steps.
  • the water vapor is suitably removed by adsorption in beds , 5 charged with an adsorbent that preferably adsorbs water vapor.
  • Artificial zeolites often called molecular sieves may suitably be used for this purpose.
  • sieves can be made with selective ability to adsorb certain matters for instance water vapor. In this case it may eventually be of interest also to adsorb carbon dioxide if it is wanted to cool to a very low temperatures in the third step.
  • the adsorption of volatile compounds can be kept very low with the right choise of adsorbent material.
  • the beds are connected alternately by valves 6, 7, 8, 9 and are regenerated in between with hot air 25 which is connected by valves 26, 27, 28, 29.
  • the atmosphere relieved from water vapor is conducted through a pipe 10 to a first cooling apparatus 12 in which the second step according to the method of the invention is accomplished.
  • the atmosphere is cooled by a heat pump 11, 13, 14, 16.
  • a suitable refrigerant is compressed in compressor 13, is cooled and condensates 14 and after pressure reduction 16 is vaporized 11 by the incoming atmosphere containing vaporized solvents which thus is cooled.
  • refrigerant in heat pumps at present fluorhydrocarbons are usually used. With for instance CHCLF context (CFC22, Freon22) the atmosphere can be cooled to -30 to -40 C.
  • a part of the volatile compounds is condense and separated 17 and tapped 18.
  • condensation 14 of the refrigerant it is cooled 15 with water or possibly air which thus is being heated and can be used for heating purpose.
  • the incoming fresh air for the ventilation can be heated bv the produced hot water.
  • the cooled atmosphere is conduc ⁇ ted from the evaporator 11 and separator 17 to the final cooling 19 where the temperature is further lowered in order to obtain a satisfactory condensation of the rest of the volatile compounds.
  • the outgoing atmosphere from the final cooler 19 is heat exchanged 22 with the ingoing atmosphere.
  • Further cooling 20 is accomplished with a suitable method.
  • dry gas e.g. a part 30 of the waterfree atmosphere from the first step is compressed, cooled by heat exchange with the outgoing atmosphere from the 3:rd step, and after expansion introduced in to the cooling 19.
  • Another method of cooling is to use an external cooling agent e.g. liquid nitrogen, if it is available to a reasonable cost.
  • an external cooling agent e.g. liquid nitrogen
  • the whole cooling apparatus 24 of step 3 is suitably insulated from the surroundings.
  • the cooling machinery in the third step may be dimensioned only for the condensation of the volatile compounds and for removing the heat that passes thr insulation.
  • the outgoing atmosphere 23 can at summertime for instance be used for cooling of fresh ventilation air. Even if the use of volatile compounds in the actual space is stopped, the equipment for performing the invention can totally or partly be used for heat recovery from outgoing air or from fresh ambient air and -thus produce heat for useful purposes.
  • the spray painting or lacquering of automotive car bodies is chosen.
  • water content is about 10 g/m .
  • the air after having passed a filter 1 is blown through one of the water adsorbing beds 4 , 5. As soon as traces of water appear in the air leaving the bed, the air is blown through the other bed and the first bed is regenerated.
  • step 2 in which it is cooled to -40 C. Only small amounts of the solvents will condense.
  • the air is cooled to -70 C. In this step most of the solvents will condense and are with ⁇ drawn.
  • both the amount of air may be reduced. For instance if the air is circulated 10 times the air flow to the equipment, may be reduced to 20 000 m /h and its content

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Treating Waste Gases (AREA)
  • Separation Of Gases By Adsorption (AREA)

Abstract

Procédé de récupération de composés volatils autres que de l'eau dans l'atmosphère, en particulier une atmosphère sous-vide, dans laquelle des matières contenant des composés volatils sont fabriquées, manipulées, stockées ou utilisées. En premier lieu, on extrait la vapeur d'eau se trouvant dans l'atmosphère (1), de préférence par adsorption (4, 5), atmosphère qui est ensuite refroidie jusqu'à condensation (12, 24) des composés volatils, de préférence en deux étapes, la première étant une étape de refroidissement utilisant une pompe à chaleur. Les composés volatils condensés sont extraits.
PCT/SE1988/000077 1987-02-27 1988-02-24 Procede de recuperation de composes volatils dans l'atmosphere WO1988006481A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DK564588A DK564588A (da) 1987-02-27 1988-10-10 Fremgangsmaade til udvinding af flygtige forbindelser fra atmosfaeren
NO884610A NO884610D0 (no) 1987-02-27 1988-10-17 Fremgangsmaate for gjenvinning av flyktige forbindelser fra en atmosfaere.
KR1019880701356A KR890700388A (ko) 1987-02-27 1988-10-26 대기로부터 휘발성 화합물을 회수하는 방법
FI893999A FI893999A0 (fi) 1987-02-27 1989-08-25 Foerfarande foer aotervinning av foeraongringsbara foereningar fraon luften.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8700832A SE459158B (sv) 1987-02-27 1987-02-27 Saett att avlaegsna foeraangade loesningsmedel ur luft,samt anordning foer genomfoerande av saettet
SE8700832-2 1987-02-27

Publications (1)

Publication Number Publication Date
WO1988006481A1 true WO1988006481A1 (fr) 1988-09-07

Family

ID=20367694

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1988/000077 WO1988006481A1 (fr) 1987-02-27 1988-02-24 Procede de recuperation de composes volatils dans l'atmosphere

Country Status (7)

Country Link
EP (1) EP0346379A1 (fr)
JP (1) JPH02502614A (fr)
KR (1) KR890700388A (fr)
AU (1) AU1428488A (fr)
FI (1) FI893999A0 (fr)
SE (1) SE459158B (fr)
WO (1) WO1988006481A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0399675A2 (fr) * 1989-05-22 1990-11-28 J. Paul Hewitt Système étanche de réfrigération utilisant une turbine d'expansion
WO1990014873A1 (fr) * 1989-05-31 1990-12-13 Inventio Oy Condenseur a deux etages
EP0456341A2 (fr) * 1990-05-09 1991-11-13 J. Paul Hewitt Système de récupération de vapeur
EP0477813A1 (fr) * 1990-09-25 1992-04-01 Gianclaudio Masetto Méthode d'élimination des polluants en forme de gaz, de vapeurs et d'aérosols d'un effluent gazeux
EP0523929A1 (fr) * 1991-07-15 1993-01-20 The Boc Group, Inc. Système de récupération par adsorption et condensation
ES2075808A1 (es) * 1994-01-11 1995-10-01 Franco Eusebio Moro Sistema de filtracion de particulas residuales contaminantes para humos y gases, mediante ultracongelacion atomizada.
US5695546A (en) * 1995-05-10 1997-12-09 Mitsubishi Jukogyo Kabushiki Kaisha Method for collecting volatile organic substances
US5702505A (en) * 1995-05-10 1997-12-30 Mitsubishi Jukogyo Kabushiki Kaisha Method for collecting volatile organic substances

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100375079B1 (ko) * 2000-10-17 2003-03-07 안창덕 휘발성 유기화합물의 흡착-응축식 회수 방법 및 이를 위한장치
JP5247046B2 (ja) * 2007-02-23 2013-07-24 三菱電機株式会社 ガソリンベーパ凝縮容器
JP5779310B2 (ja) * 2009-02-27 2015-09-16 日本リファイン株式会社 揮発性有機化合物の回収方法及び回収装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3078635A (en) * 1960-01-06 1963-02-26 Union Carbide Corp Water separation from a vapor mixture
US3982912A (en) * 1971-03-31 1976-09-28 Yoshifumi Yatsurugi Method for preparation of an improved K-A type zeolite and for separation by adsorption polar and non-polar molecules
EP0071907A1 (fr) * 1981-08-10 1983-02-16 Orlando Bedolo Cycle réfrigérant de pompe de chaleur pour la purification de mélanges gazeux condensables
DE3134506A1 (de) * 1981-09-01 1983-03-17 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt "verfahren und anordnung zur kondensation von damp aus einem dampf-gas-gemisch"
EP0124997A2 (fr) * 1983-04-01 1984-11-14 The BOC Group, Inc. Procédé de récupération de vapeur de dissolvant
EP0215472A2 (fr) * 1985-09-18 1987-03-25 OTTO OEKO-TECH GMBH & CO. KG Procédé et dispositif pour séparer et récupérer des solvants volatils

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3078635A (en) * 1960-01-06 1963-02-26 Union Carbide Corp Water separation from a vapor mixture
US3982912A (en) * 1971-03-31 1976-09-28 Yoshifumi Yatsurugi Method for preparation of an improved K-A type zeolite and for separation by adsorption polar and non-polar molecules
EP0071907A1 (fr) * 1981-08-10 1983-02-16 Orlando Bedolo Cycle réfrigérant de pompe de chaleur pour la purification de mélanges gazeux condensables
DE3134506A1 (de) * 1981-09-01 1983-03-17 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt "verfahren und anordnung zur kondensation von damp aus einem dampf-gas-gemisch"
EP0124997A2 (fr) * 1983-04-01 1984-11-14 The BOC Group, Inc. Procédé de récupération de vapeur de dissolvant
EP0215472A2 (fr) * 1985-09-18 1987-03-25 OTTO OEKO-TECH GMBH & CO. KG Procédé et dispositif pour séparer et récupérer des solvants volatils

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0399675A2 (fr) * 1989-05-22 1990-11-28 J. Paul Hewitt Système étanche de réfrigération utilisant une turbine d'expansion
EP0399675A3 (fr) * 1989-05-22 1991-01-23 J. Paul Hewitt Système étanche de réfrigération utilisant une turbine d'expansion
WO1990014873A1 (fr) * 1989-05-31 1990-12-13 Inventio Oy Condenseur a deux etages
US5231836A (en) * 1989-05-31 1993-08-03 Inventio Oy Two-stage condenser
EP0456341A2 (fr) * 1990-05-09 1991-11-13 J. Paul Hewitt Système de récupération de vapeur
EP0456341A3 (en) * 1990-05-09 1992-05-20 J. Paul Hewitt Vapor recovery system
EP0477813A1 (fr) * 1990-09-25 1992-04-01 Gianclaudio Masetto Méthode d'élimination des polluants en forme de gaz, de vapeurs et d'aérosols d'un effluent gazeux
EP0523929A1 (fr) * 1991-07-15 1993-01-20 The Boc Group, Inc. Système de récupération par adsorption et condensation
ES2075808A1 (es) * 1994-01-11 1995-10-01 Franco Eusebio Moro Sistema de filtracion de particulas residuales contaminantes para humos y gases, mediante ultracongelacion atomizada.
US5695546A (en) * 1995-05-10 1997-12-09 Mitsubishi Jukogyo Kabushiki Kaisha Method for collecting volatile organic substances
US5702505A (en) * 1995-05-10 1997-12-30 Mitsubishi Jukogyo Kabushiki Kaisha Method for collecting volatile organic substances

Also Published As

Publication number Publication date
AU1428488A (en) 1988-09-26
SE8700832L (sv) 1988-08-28
FI893999A (fi) 1989-08-25
JPH02502614A (ja) 1990-08-23
EP0346379A1 (fr) 1989-12-20
FI893999A0 (fi) 1989-08-25
SE459158B (sv) 1989-06-12
KR890700388A (ko) 1989-04-24
SE8700832D0 (sv) 1987-02-27

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