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EP0275279A1 - A device for the production of gas from solid fuels - Google Patents

A device for the production of gas from solid fuels

Info

Publication number
EP0275279A1
EP0275279A1 EP87904651A EP87904651A EP0275279A1 EP 0275279 A1 EP0275279 A1 EP 0275279A1 EP 87904651 A EP87904651 A EP 87904651A EP 87904651 A EP87904651 A EP 87904651A EP 0275279 A1 EP0275279 A1 EP 0275279A1
Authority
EP
European Patent Office
Prior art keywords
conical
fuel
combustion chamber
chamber
intake
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.)
Ceased
Application number
EP87904651A
Other languages
German (de)
French (fr)
Inventor
Olle Tornegard
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.)
WGE WASTE GAS ENERGY AB
Original Assignee
WGE WASTE GAS ENERGY AB
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 WGE WASTE GAS ENERGY AB filed Critical WGE WASTE GAS ENERGY AB
Publication of EP0275279A1 publication Critical patent/EP0275279A1/en
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/02—Fixed-bed gasification of lump fuel
    • C10J3/20—Apparatus; Plants
    • C10J3/34—Grates; Mechanical ash-removing devices
    • C10J3/40—Movable grates
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/02—Fixed-bed gasification of lump fuel
    • C10J3/20—Apparatus; Plants
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/02—Fixed-bed gasification of lump fuel
    • C10J3/20—Apparatus; Plants
    • C10J3/22—Arrangements or dispositions of valves or flues
    • C10J3/24—Arrangements or dispositions of valves or flues to permit flow of gases or vapours other than upwardly through the fuel bed
    • C10J3/26—Arrangements or dispositions of valves or flues to permit flow of gases or vapours other than upwardly through the fuel bed downwardly
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/02—Fixed-bed gasification of lump fuel
    • C10J3/20—Apparatus; Plants
    • C10J3/34—Grates; Mechanical ash-removing devices
    • C10J3/40—Movable grates
    • C10J3/42—Rotary grates
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/72—Other features
    • C10J3/723—Controlling or regulating the gasification process
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/72—Other features
    • C10J3/74—Construction of shells or jackets
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0953—Gasifying agents
    • C10J2300/0956—Air or oxygen enriched air

Definitions

  • a device for the production of gas from solid fuels A device for the production of gas from solid fuels
  • This invention relates to a device for the production of gas through air-reduction from solid fuels
  • the device is provided with an intake fitted for primary air, an outlet fitted for collected gas, steering devices for the regulating of required heat to intake and outlet, a fuel chamber which consists of an upper part arranged with circular cross-section and a lower conical part attached to the upper part and enclosed into two between each other conical parts where the outer part is welded at the fuel chamber, a displaceable rotary motor driven means arranged in a vertical line inside the fuel chamber and consisting of a fixed part which into its upper part is provided with a rotary motor driven compensation means for supplied fuel and two in this fixed part telescopic parts displaceable into each other, where the inner vertically adjustable part regulated by motor in its lower part is provided with holes for the supply of air to the fuel for the gasifying into the bottom to a combustion chamber whieh comprises steering means for the regulating of heat and which is situated below the conical part and between the inserted displaceable parts and the conical part which is enclosed the
  • the figure shows the lower part of a device, which is like the applicant's before filed patent application nr 8500849-8.
  • the device 1 is provided with an intake 2 for primary air and an outlet 3 for collected gas for further treatment in the heat- or power production, whereas steering means not showed are arranged for the regulating of required heat to intake 2 and outlet 3.
  • the device 1 is further provided with a fuel chamber 4 consisting of an upper part 5 arranged with circular cross-section and a lower conical part 6 attached to the upper part 5 and enclosed into two between each other conical parts 7 and 8, where the outer part 8 is welded at the fuel chamber 4, while the inner part 7 either by way of ceramic material is connected to the outer part 8 or possibly is adjustable relative to the outer part 8.
  • a means 9 which is produced rotary displaceable in vertical line and which is composed of a fixed part 10 which in its upper part is provided with a not showed rotary compensation means for the fuel supplied and two in this part 10 telescopic parts 11 and 12 displaceable into each other, where the inner part 12 is vertically adjustable and into its lower part provided with holes 13 for supply of air to the fuel for the gasifying into the bottom to a combustion chamber 14 which comprises a steering means for the regulating of heat.
  • the combustion chamber 14 is situated below the conical part 6 and between the two inserted displaceable parts 11 and 12 and the conical part 7 which encloses the conical part 6. Between the device 1 and the welded conical part 8 there is an outlet means 15 to the outlet 3 for collected gas.
  • the rotary movement for compensation means and the displaceable means 9 is produced by motors of conventional type.
  • the vertically adjustable movement for the telescopically displaceable part 12 is also by motor of conventional type.
  • the combustion chamber 14 is also provided with at least two adjustable intake means 16 for primary air. Below the combustion chamber 14 there is a half ellipsoidal-shaped means 17, which is composed of ceramic material and supports gasified material rests.
  • the half ellipsoidal-shaped means 17 is arranged on a plate 18 or the like which is provided with a steering device not showed for right supply of fuel, rate of gasifying and ash-feed-out and which is produced vibratory and adjustable under turnable conditions in vertical- and horizontal line.
  • a steering device not showed for right supply of fuel, rate of gasifying and ash-feed-out and which is produced vibratory and adjustable under turnable conditions in vertical- and horizontal line.
  • the ashes are brought down into a sluice device nox; showed having an ash transporter for further removing.
  • the device 1 is also provided with a fan means not showed into the intake 2 for primary air.
  • the primary air is arranged to go on one hand along the fuel chamber for the supply into the upper part not showed of the fixed part 10 of the displaceable means 9 and then down to the holes 13 on the other into the adjustable intake means 16.
  • the plate 18 is driven by a driving means 23 in the form of a motor of conventional type and is further provided with a guidable means 24 for ash scraping.
  • the device functions in about the same way which has been described in the patent application earlier given by the applicant.
  • the principal difference is that the grate hearth has been removed and replaced with the means 17 which is composed of ceramic material and that the attached lower conical part 6 is vibratory and gives a good supply of fuel to the combustion chamber 14, especially for damp material.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Solid-Fuel Combustion (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Sewing Machines And Sewing (AREA)
  • Hydrogen, Water And Hydrids (AREA)
  • Separating Particles In Gases By Inertia (AREA)
  • Treating Waste Gases (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)

Abstract

Un dispositif (1), permettant de produire du gaz à partir de combustibles solides par réduction d'air, est équipé des dispositifs traditionnels (2, 3, 4, 9, 20, 22) notamment d'admission et d'émission. Ledit dispositif se caractérise par une chambre de combustion (14) ayant la forme d'un tronc de cône à double enveloppe dont l'extrémité large est en amont et comprenant une partie conique (6) disposée près de la chambre (4) contenant le combustible, deux parties coniques (7 et 8) qui protègent ladite partie conique (6), la partie interne (7) se composant d'un matériau céramique et la partie externe (8) étant soudée à la chambre (4) contenant le combustible. La chambre de combustion comprend également un organe (17) composé d'un matériau céramique, servant de support aux restes de matériau gazéifié et monté sur une plaque (18) ou autre, laquelle est montée de façon réglable et rotative verticalement et horizontalement. Ladite chambre de combustion (14) est également pourvue d'au moins deux organes réglables (16) permettant l'admission d'air primaire à travers le couvercle de la chambre de combustion (14). La partie conique (6) est montée de façon à pouvoir vibrer verticalement grâce à deux arbres (25), la distance entre l'organe (17) qui sert de support aux restes de matériau et la partie inférieure des parties coniques de protection (7 et 8) est conçue de manière à permettre la régulation appropriée de l'alimentation en combustibles, de la vitesse de gazéification et de l'expulsion des cendres au moyen d'un dispositif de direction non représenté.A device (1), making it possible to produce gas from solid fuels by reducing air, is equipped with traditional devices (2, 3, 4, 9, 20, 22), in particular of intake and emission. Said device is characterized by a combustion chamber (14) having the form of a trunk of cone with a double envelope whose wide end is upstream and comprising a conical part (6) disposed near the chamber (4) containing the fuel, two conical parts (7 and 8) which protect said conical part (6), the internal part (7) being made of a ceramic material and the external part (8) being welded to the chamber (4) containing the fuel . The combustion chamber also comprises a member (17) composed of a ceramic material, serving as a support for the remains of carbonated material and mounted on a plate (18) or the like, which is mounted in an adjustable manner and rotatable vertically and horizontally. Said combustion chamber (14) is also provided with at least two adjustable members (16) allowing the admission of primary air through the cover of the combustion chamber (14). The conical part (6) is mounted so as to be able to vibrate vertically by means of two shafts (25), the distance between the member (17) which serves to support the remains of material and the lower part of the conical protection parts (7 and 8) is designed so as to allow the proper regulation of the fuel supply, the rate of gasification and the expulsion of the ash by means of a steering device not shown.

Description

A device for the production of gas from solid fuels
This invention relates to a device for the production of gas through air-reduction from solid fuels where the device is provided with an intake fitted for primary air, an outlet fitted for collected gas, steering devices for the regulating of required heat to intake and outlet, a fuel chamber which consists of an upper part arranged with circular cross-section and a lower conical part attached to the upper part and enclosed into two between each other conical parts where the outer part is welded at the fuel chamber, a displaceable rotary motor driven means arranged in a vertical line inside the fuel chamber and consisting of a fixed part which into its upper part is provided with a rotary motor driven compensation means for supplied fuel and two in this fixed part telescopic parts displaceable into each other, where the inner vertically adjustable part regulated by motor in its lower part is provided with holes for the supply of air to the fuel for the gasifying into the bottom to a combustion chamber whieh comprises steering means for the regulating of heat and which is situated below the conical part and between the inserted displaceable parts and the conical part which is enclosed the conical part, an outlet means, which is arranged between the device and the welded conical part, to the outlet for collected gas, conventional equipment in the form of combustion damper, an intake not showed airtight relative to the device for the supply of fuel, a feeder for the distribution of fuel supplied and inspections hatches required for the working.
It is before known different types of boilers, generators or the like having either upstream or downstream combustion for gas production where the supply of primary air occurs be means of overpressure or vacuum on an exact place into the process works. If intake of primary air occurs on several places, a complete combustion of the material arises. The device according to the invention intends to produce a supply of primary air on several places without the final combustion of the material arising, i.e. incomplete combustion and a satisfactory combustible gas can be produced for further use of any kind. The device is further below its combustion chamber provided with a means, which is vibratory, burnable and adjustable in vertical and horizontal line and intends to regulate right supply of fuel, rate of gasifying and ash-feed-out with a particular steering means. By means of the supply of oxygen in adjustable amount to the different places it can be attained more effective moment of oxidation, whereas less sensitiveness for damper material and choice of fuel quality are attained. It also occurs in some materials, as for example chips or the like, a large amount of impurities in the form of for example stones, gravels or the like, or if refuse is used, plate, scrap or the like. These materials clog existing grate means. In the invention this material is removed in order to avoid clogging. The device according to the invention is characterized by what is evident from the patent claim enclosed where consideration has been taken in the preamble of the claim to the applicant's patent application nr 8500849-8, since the invention in some parts is a further development of said application.
The device will now be more closely described with reference to the drawing enclosed where the figure shows the device in a frontal view.
The figure shows the lower part of a device, which is like the applicant's before filed patent application nr 8500849-8. The device 1 is provided with an intake 2 for primary air and an outlet 3 for collected gas for further treatment in the heat- or power production, whereas steering means not showed are arranged for the regulating of required heat to intake 2 and outlet 3. The device 1 is further provided with a fuel chamber 4 consisting of an upper part 5 arranged with circular cross-section and a lower conical part 6 attached to the upper part 5 and enclosed into two between each other conical parts 7 and 8, where the outer part 8 is welded at the fuel chamber 4, while the inner part 7 either by way of ceramic material is connected to the outer part 8 or possibly is adjustable relative to the outer part 8. At the upper part of the device 1 there is conventional equipment not showed in the form of a combustion damper, an intake airtight relative to the device for the supply of fuel, a feeder for the distribution of fuel supplied and inspection hatches required for the working. Inside the fuel chamber 4 there is arranged a means 9 which is produced rotary displaceable in vertical line and which is composed of a fixed part 10 which in its upper part is provided with a not showed rotary compensation means for the fuel supplied and two in this part 10 telescopic parts 11 and 12 displaceable into each other, where the inner part 12 is vertically adjustable and into its lower part provided with holes 13 for supply of air to the fuel for the gasifying into the bottom to a combustion chamber 14 which comprises a steering means for the regulating of heat. The combustion chamber 14 is situated below the conical part 6 and between the two inserted displaceable parts 11 and 12 and the conical part 7 which encloses the conical part 6. Between the device 1 and the welded conical part 8 there is an outlet means 15 to the outlet 3 for collected gas. The rotary movement for compensation means and the displaceable means 9 is produced by motors of conventional type. The vertically adjustable movement for the telescopically displaceable part 12 is also by motor of conventional type. The combustion chamber 14 is also provided with at least two adjustable intake means 16 for primary air. Below the combustion chamber 14 there is a half ellipsoidal-shaped means 17, which is composed of ceramic material and supports gasified material rests. The half ellipsoidal-shaped means 17 is arranged on a plate 18 or the like which is provided with a steering device not showed for right supply of fuel, rate of gasifying and ash-feed-out and which is produced vibratory and adjustable under turnable conditions in vertical- and horizontal line. Below the supporting means 17 there is an ash-feed-out means 20 which is steered by a driving means 21 in the form of a motor of conventional type and is provided with a cooling shell 19. The ashes are brought down into a sluice device nox; showed having an ash transporter for further removing. The device 1 is also provided with a fan means not showed into the intake 2 for primary air. The primary air is arranged to go on one hand along the fuel chamber for the supply into the upper part not showed of the fixed part 10 of the displaceable means 9 and then down to the holes 13 on the other into the adjustable intake means 16. The plate 18 is driven by a driving means 23 in the form of a motor of conventional type and is further provided with a guidable means 24 for ash scraping.
The device functions in about the same way which has been described in the patent application earlier given by the applicant. The principal difference is that the grate hearth has been removed and replaced with the means 17 which is composed of ceramic material and that the attached lower conical part 6 is vibratory and gives a good supply of fuel to the combustion chamber 14, especially for damp material.
The invention is of course not United to this design but can of course be varied within the scope of the invention idea.

Claims

C L A I M
1 A device for the production of gas through air-reduction from solid fuels, where said device(l) is provided with conventional equipment in the form of devices(2,3,4,9,20,22) for intake and outlet, c h a r a c t e r i z e d in that a combustion chamber(14) is arranged in the form of a twin-shell frustum of a cone mounted with its wide end upwards comprising a conical part(6) arranged at the fuel chamber(4), two conical parts(7 and 8) which enclose said conical part(6) and where the inner part (7) is composed of ceramic material and the outer part(δ) is welded at the fuel chaιaber(4) and a means(17) which is composed of ceramic material, supports gasified material rests and is mounted on a plate(18) or the like, which is produced adjustable under turnable condition in vertical and horizontal line, that said combustion chamber(14) is provided with at least two adjustable means(16) for intake of primary air through the cover of the combustion chamber(14) and that the conical part(6) is produced vibratory in vertical line by means of two shaft means(25) whereas the distance between the means(17) which supports material rests and the lower part of the enclosing conical parts(7 and 8) is arranged to regulate right supply of fuel, rate of gasifying and ash-feed-out by means of a steering device not showed.
EP87904651A 1986-07-08 1987-07-07 A device for the production of gas from solid fuels Ceased EP0275279A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8603045A SE453670C (en) 1986-07-08 1986-07-08 DEVICE FOR THE PREPARATION OF GAS FROM FIXED BRAINS
SE8603045 1986-07-08

Publications (1)

Publication Number Publication Date
EP0275279A1 true EP0275279A1 (en) 1988-07-27

Family

ID=20365073

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87904651A Ceased EP0275279A1 (en) 1986-07-08 1987-07-07 A device for the production of gas from solid fuels

Country Status (17)

Country Link
EP (1) EP0275279A1 (en)
JP (1) JPH01500758A (en)
KR (1) KR950001708B1 (en)
CN (1) CN1041608A (en)
AT (1) ATA901987A (en)
AU (1) AU597409B2 (en)
BR (1) BR8707410A (en)
CH (1) CH675016A5 (en)
DE (2) DE3790370C2 (en)
DK (1) DK88188A (en)
FI (1) FI880968A7 (en)
GB (1) GB2202547B (en)
HU (1) HU201110B (en)
NL (1) NL8720329A (en)
NO (1) NO168949C (en)
SE (1) SE453670C (en)
WO (1) WO1988000230A1 (en)

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US5050374A (en) * 1990-08-01 1991-09-24 John Hunter Gasification/combustion system
SE502142C2 (en) * 1991-10-18 1995-08-28 Henrik Carlsson Generator for generating gas in gas generator
JPH0673384A (en) * 1992-05-07 1994-03-15 Hylsa Sa Method and apparatus for gasifying organic substance
US5851246A (en) * 1992-05-07 1998-12-22 Hylsa, S.A. De C.V. Apparatus for gasifying organic materials
US5656044A (en) * 1992-05-07 1997-08-12 Hylsa S.A. De C.V. Method and apparatus for gasification of organic materials
CN1062297C (en) * 1995-03-16 2001-02-21 北京市西城区新开通用试验厂 Numerical controlled ground controller for coal mine gasification
RU2215936C1 (en) * 2002-04-22 2003-11-10 Государственное научное учреждение Всероссийский научно-исследовательский и проектно-технологический институт по использованию техники и нефтепродуктов в сельском хозяйстве Boiler furnace
FI122109B (en) * 2006-11-17 2011-08-31 Leo Ruokamo Process for gasification of a fuel and gasification generator
WO2009100487A1 (en) * 2008-02-12 2009-08-20 Jens Berkan Downstream gasifier with multi-axis actuated bed interface to the reduction zone
ITTO20090125A1 (en) * 2009-02-20 2010-08-21 Socoges S R L GASIFICATOR EQUIPPED WITH A PERFECT COMBUSTION CHAMBER
GB201015544D0 (en) * 2010-09-17 2010-10-27 O Gen Uk Ltd Biomass gasifier and gasification plant
CA2899123C (en) * 2013-01-28 2017-08-15 PHG Energy, LLC Method and device for gasifying feedstock
RU2561806C1 (en) * 2014-07-24 2015-09-10 Игорь Вячеславович Крыжановский Furnace for combustion of solid fuel (versions)
KR101655844B1 (en) * 2015-09-10 2016-09-08 주식회사 대원지에스아이 The Pyrolysis gasification of draft up Type Non a fluidized medium
SE540254C2 (en) * 2016-10-31 2018-05-15 Olsson Mats An infrasound generator for enhancing the combustion of solid fuels
KR101736838B1 (en) * 2017-04-20 2017-05-29 채재우 Hybrid type combustion device using pyrolysis of water and combustion air
JP2020105451A (en) * 2018-12-28 2020-07-09 ユア・エネルギー開発株式会社 Gasification furnace using biomass raw material
JP2023183235A (en) 2022-06-15 2023-12-27 キヤノン株式会社 Image processing device, control method and program
EP4424410A1 (en) * 2023-03-01 2024-09-04 Modell- und Formenbau Blasius Gerg GmbH Air supply device for a fixed bed gasifier
CN116085815B (en) * 2023-04-07 2023-06-23 河北惠华达宇科技有限公司 Method and structure for pushing out biomass coking in radiation mode

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Also Published As

Publication number Publication date
DE3790370T (en) 1988-09-15
AU7700287A (en) 1988-01-29
DK88188D0 (en) 1988-02-19
HUT49906A (en) 1989-11-28
KR950001708B1 (en) 1995-02-28
AU597409B2 (en) 1990-05-31
NO168949B (en) 1992-01-13
ATA901987A (en) 1993-06-15
GB8804800D0 (en) 1988-04-27
SE453670C (en) 1989-09-25
GB2202547A (en) 1988-09-28
HU201110B (en) 1990-09-28
SE8603045D0 (en) 1986-07-08
DE3790370C2 (en) 1990-07-26
FI880968A0 (en) 1988-03-02
NO168949C (en) 1992-04-22
WO1988000230A1 (en) 1988-01-14
BR8707410A (en) 1988-11-01
CH675016A5 (en) 1990-08-15
DK88188A (en) 1988-03-02
NL8720329A (en) 1988-06-01
JPH01500758A (en) 1989-03-16
SE453670B (en) 1988-02-22
KR880701767A (en) 1988-11-05
GB2202547B (en) 1991-03-27
SE8603045L (en) 1988-01-09
CN1041608A (en) 1990-04-25
FI880968A7 (en) 1988-03-02
NO881012D0 (en) 1988-03-07
NO881012L (en) 1988-03-07
JPH0375594B2 (en) 1991-12-02

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