EP0250390A3 - Air-separating device using storage of a product gas in liquefied form - Google Patents

Air-separating device using storage of a product gas in liquefied form Download PDF

Info

Publication number
EP0250390A3
EP0250390A3 EP87890097A EP87890097A EP0250390A3 EP 0250390 A3 EP0250390 A3 EP 0250390A3 EP 87890097 A EP87890097 A EP 87890097A EP 87890097 A EP87890097 A EP 87890097A EP 0250390 A3 EP0250390 A3 EP 0250390A3
Authority
EP
European Patent Office
Prior art keywords
product gas
liquefied
line
air
gas line
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Withdrawn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
EP87890097A
Other languages
German (de)
French (fr)
Other versions
EP0250390A2 (en
Inventor
Karl Dipl-Ing Faltejsek
Dieter Dipl.-Ing. Siuka
Rainer Wawrina
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.)
Voestalpine AG
Original Assignee
Voestalpine AG
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 Voestalpine AG filed Critical Voestalpine AG
Publication of EP0250390A2 publication Critical patent/EP0250390A2/en
Publication of EP0250390A3 publication Critical patent/EP0250390A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
    • F25J3/04866—Construction and layout of air fractionation equipments, e.g. valves, machines
    • F25J3/04969—Retrofitting or revamping of an existing air fractionation unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04078—Providing pressurised feed air or process streams within or from the air fractionation unit providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression
    • F25J3/04084—Providing pressurised feed air or process streams within or from the air fractionation unit providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression of nitrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04078—Providing pressurised feed air or process streams within or from the air fractionation unit providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression
    • F25J3/0409—Providing pressurised feed air or process streams within or from the air fractionation unit providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression of oxygen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
    • F25J3/04284—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams
    • F25J3/0429—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams of feed air, e.g. used as waste or product air or expanded into an auxiliary column
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
    • F25J3/04284—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams
    • F25J3/04309—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams of nitrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
    • F25J3/04333—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams
    • F25J3/04363—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams of oxygen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04472—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using the cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages
    • F25J3/04496—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using the cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages for compensating variable air feed or variable product demand by alternating between periods of liquid storage and liquid assist
    • F25J3/04503—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using the cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages for compensating variable air feed or variable product demand by alternating between periods of liquid storage and liquid assist by exchanging "cold" between at least two different cryogenic liquids, e.g. independently from the main heat exchange line of the air fractionation and/or by using external alternating storage systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2215/00—Processes characterised by the type or other details of the product stream
    • F25J2215/40—Air or oxygen enriched air, i.e. generally less than 30mol% of O2

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

In einer Einrichtung zum Zerlegen von Luft, insbesondere unter Verwendung eines Tieftemperaturrektifikationsverfahrens, in welcher die Luft verdichtet, gekühlt und expandiert und/oder mit Molekularsieben (10) gereinigt wird und Sauerstoff und Stickstoff sowie gegebenenfalls Edelgase gesondert über Produktgasleitungen ausgebracht werden, ist an eine Produkgasleitung (30) wenigstens eine Zweigleitung (31) angeschlossen, welche über einen Wärmetauscher (9) geführt ist. Weiters sind wenigstens zwei Speicher (7,12) für zwei voneinander verschiedene verflüssigte Gase vorgesehen und das aus der Produktgasleitung (30) abgezweigte Produkt wird durch Abkühlen verflüssigt und gespeichert, wobei die Abkühlung im Wärmetauscher (9) durch das jeweils andere verflüssigte Gas erfolgt und wobei wenigstens eine Rückführungsleitung (32) zwischen einem Speicher (7) für verflüssigtes Produktgas und der Produktgasleitung (30) vorgesehen ist, wodurch die Vorteile eines Wechselspeicherbetriebes erzielbar sind. In a device for air separation, especially under Using a low temperature rectification process, in which the air compresses, cools and expands and / or with Molecular sieves (10) is cleaned and oxygen and Nitrogen and possibly noble gases separately Product gas lines are brought out to a product gas line (30) at least one branch line (31) connected via a heat exchanger (9) is guided. Furthermore, at least two stores (7, 12) for two different liquefied ones Gases provided and that from the product gas line (30) branched product is liquefied by cooling and stored, the cooling in the heat exchanger (9) by the each other is liquefied gas and at least one Return line (32) between a memory (7) for liquefied product gas and the product gas line (30) provided is, which gives the advantages of removable storage are achievable.

Vorzugsweise ist eine Zweigleitung (33) der Produktgasleitung (30) über eine Expansionsturbine (18) geführt. A branch line (33) of the product gas line is preferably (30) via an expansion turbine (18).

EP87890097A 1986-05-14 1987-05-13 Air-separating device using storage of a product gas in liquefied form Withdrawn EP0250390A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT129186A AT387454B (en) 1986-05-14 1986-05-14 DEVICE FOR DISASSEMBLING AIR WITH STORAGE OF PRODUCT GAS IN LIQUID FORM
AT1291/86 1986-05-14

Publications (2)

Publication Number Publication Date
EP0250390A2 EP0250390A2 (en) 1987-12-23
EP0250390A3 true EP0250390A3 (en) 1988-04-13

Family

ID=3510708

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87890097A Withdrawn EP0250390A3 (en) 1986-05-14 1987-05-13 Air-separating device using storage of a product gas in liquefied form

Country Status (2)

Country Link
EP (1) EP0250390A3 (en)
AT (1) AT387454B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2757282B1 (en) * 1996-12-12 2006-06-23 Air Liquide METHOD AND INSTALLATION FOR PROVIDING A VARIABLE FLOW OF AN AIR GAS
EP1020695B1 (en) * 1999-01-12 2003-10-08 Air Products And Chemicals, Inc. Power savings for gas separation at turndown
DE102011080337A1 (en) * 2011-08-03 2013-02-07 Siemens Aktiengesellschaft Method for buffering energy available in an energy distribution network
EP2859196B1 (en) 2012-06-11 2018-05-16 Arano-Trade Ltd. Energy transformation system
FR2996909A1 (en) * 2012-10-12 2014-04-18 Air Liquide Method for production of liquefied air and separation of air, involves cooling and liquefying air flow by indirect heat transfer with liquid nitrogen flow that is vaporized by indirect heat transfer to form nitrogen gas

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1275951A (en) * 1959-12-14 1961-11-10 British Oxygen Co Ltd Low-temperature separation process for gas mixtures
DE1250848B (en) * 1967-09-28 Linde Aktiengesellschaft, Wiesbaden Method and device for the low-temperature decomposition of air with fluctuations in oxygen decrease
GB1178006A (en) * 1966-03-25 1970-01-14 Air Liquide Process for the production of a Gas in the Gaseous State under Pressure in Variable Quantities, and in the Liquid State
SU777372A1 (en) * 1977-04-08 1980-11-07 Предприятие П/Я А-3605 Method of discharging oxygen from air separating plant

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1268688A (en) * 1969-10-15 1972-03-29 Southern Gas Board Improvements in off-peak natural gas storage
DE2434238A1 (en) * 1974-07-16 1976-01-29 Linde Ag System to store and retrieve stored energy - has gas type auxiliary energy storage medium which is liquefied when energy requirements are low

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1250848B (en) * 1967-09-28 Linde Aktiengesellschaft, Wiesbaden Method and device for the low-temperature decomposition of air with fluctuations in oxygen decrease
FR1275951A (en) * 1959-12-14 1961-11-10 British Oxygen Co Ltd Low-temperature separation process for gas mixtures
GB1178006A (en) * 1966-03-25 1970-01-14 Air Liquide Process for the production of a Gas in the Gaseous State under Pressure in Variable Quantities, and in the Liquid State
SU777372A1 (en) * 1977-04-08 1980-11-07 Предприятие П/Я А-3605 Method of discharging oxygen from air separating plant

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, Band 94, Nr. 14, 6. April 1981, Seiten 146,147, Zusammenfassung Nr. 105821n, Columbus, Ohio, US; & SU-A-777 372 (L.P. DANILENKO et al.) 07-11-1980 *

Also Published As

Publication number Publication date
ATA129186A (en) 1988-06-15
EP0250390A2 (en) 1987-12-23
AT387454B (en) 1989-01-25

Similar Documents

Publication Publication Date Title
DE69218542T2 (en) Cryogenic distillation process for the production of oxygen and nitrogen
US4883518A (en) Process for air fractionation by low-temperature rectification
DE2543291A1 (en) PROCESS FOR PROCESSING A NATURAL GAS FLOW
DE1117616B (en) Method and device for obtaining particularly pure decomposition products in cryogenic gas separation plants
JPS5981483A (en) Method of liquefying methane
DE69030327T2 (en) Nitrogen manufacturing process
EP0383994A2 (en) Air rectification process and apparatus
DE2164795A1 (en) Method and device for air separation
ES2110113T3 (en) PROCEDURE AND APPARATUS FOR THE PRODUCTION OF LIQUID CARBON DIOXIDE.
DE1095866B (en) Process and device for the separation of carbon dioxide from compressed gases
DE2548240A1 (en) Cooling system employing expansion in nozzles - has part of compressed refrigerant medium expanded and used to cool down remaining refrigerant
EP0250390A3 (en) Air-separating device using storage of a product gas in liquefied form
DE2521724A1 (en) PROCESS AND DEVICE FOR THE EXTRACTION OF OXYGEN, NITROGEN AND ARGON BY AIR FRACTION WITH A SIMPLE FRACTION COLUMN
DE69402643T2 (en) Process and device for producing gaseous oxygen and / or nitrogen under pressure
DE2155366A1 (en) Method and device for purifying natural gas
DE68901667T2 (en) AIR SEPARATION.
DE69308096T2 (en) Method and device for producing ultra-high purity nitrogen
DE60016874T2 (en) air separation
DE1235346B (en) Method and device for washing out impurities from hydrogen-rich gas mixtures by means of liquid nitrogen
DE1170435B (en) Process for the liquefaction of a gas to be stored in the liquid state under low pressure
DE1815532A1 (en) Process for generating cold
DE19517116C1 (en) Process for reducing energy consumption
DE2814660A1 (en) Carbon mon:oxide and hydrogen recovery from gas mixt. - by partial liquefaction, rectification and scrubbing with liquid nitrogen
EP0168519A2 (en) Apparatus for liquefying a low-boiling gas, particularly helium gas
DE3741906A1 (en) Process for isolating H2 and CO

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): BE CH DE FR GB IT LI LU NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): BE CH DE FR GB IT LI LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19881014

RIN1 Information on inventor provided before grant (corrected)

Inventor name: WAWRINA, RAINER

Inventor name: FALTEJSEK, KARL, DIPL-ING

Inventor name: SIUKA, DIETER, DIPL.-ING.