DK200200062U4 - Indretning og system til slaggefjernelse ved hjælp af online kontrolleret sprængning - Google Patents

Indretning og system til slaggefjernelse ved hjælp af online kontrolleret sprængning

Info

Publication number
DK200200062U4
DK200200062U4 DK200200062U DKBA200200062U DK200200062U4 DK 200200062 U4 DK200200062 U4 DK 200200062U4 DK 200200062 U DK200200062 U DK 200200062U DK BA200200062 U DKBA200200062 U DK BA200200062U DK 200200062 U4 DK200200062 U4 DK 200200062U4
Authority
DK
Denmark
Prior art keywords
explosion
installation
cooling
explosion device
slag removal
Prior art date
Application number
DK200200062U
Other languages
English (en)
Inventor
Francis Zilka
Timothy Zilka
Kurt Prouty
Donald Howard
Christopher Scaringe
William Youngs
Original Assignee
North American Ind Services In
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
Priority claimed from US08/786,096 external-priority patent/US5769034A/en
Application filed by North American Ind Services In filed Critical North American Ind Services In
Publication of DK200200062U1 publication Critical patent/DK200200062U1/da
Priority to DK200200413U priority Critical patent/DK200200413U4/da
Application granted granted Critical
Publication of DK200200062U4 publication Critical patent/DK200200062U4/da

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D25/00Devices or methods for removing incrustations, e.g. slag, metal deposits, dust; Devices or methods for preventing the adherence of slag
    • F27D25/006Devices or methods for removing incrustations, e.g. slag, metal deposits, dust; Devices or methods for preventing the adherence of slag using explosives
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/0007Cleaning by methods not provided for in a single other subclass or a single group in this subclass by explosions
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00Cleaning hollow articles by methods or apparatus specially adapted thereto
    • B08B9/08Cleaning containers, e.g. tanks
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J3/00Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
    • F23J3/02Cleaning furnace tubes; Cleaning flues or chimneys
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J3/00Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
    • F23J3/02Cleaning furnace tubes; Cleaning flues or chimneys
    • F23J3/023Cleaning furnace tubes; Cleaning flues or chimneys cleaning the fireside of watertubes in boilers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00Casings; Linings; Walls; Roofs
    • F27D1/12Casings; Linings; Walls; Roofs incorporating cooling arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00Casings; Linings; Walls; Roofs
    • F27D1/16Making or repairing linings ; Increasing the durability of linings; Breaking away linings
    • F27D1/1694Breaking away the lining or removing parts thereof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28GCLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G7/00Cleaning by vibration or pressure waves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28GCLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G7/00Cleaning by vibration or pressure waves
    • F28G7/005Cleaning by vibration or pressure waves by explosions or detonations; by pressure waves generated by combustion processes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D9/00Cooling of furnaces or of charges therein

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Cleaning In General (AREA)
  • Incineration Of Waste (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Hardware Redundancy (AREA)
  • Saccharide Compounds (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Manufacture Of Iron (AREA)
  • Furnace Details (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Processing Of Solid Wastes (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Paper (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
DK200200062U 1997-01-17 2002-03-07 Indretning og system til slaggefjernelse ved hjælp af online kontrolleret sprængning DK200200062U4 (da)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DK200200413U DK200200413U4 (da) 1999-09-10 2002-12-30 Indretning og system til slaggefjernelse ved hjælp af online kontrolleret sprængning

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/786,096 US5769034A (en) 1997-01-17 1997-01-17 Device, system and method for on-line explosive deslagging
US09/394,377 US6321690B1 (en) 1997-01-17 1999-09-10 Device, system and method for on-line explosive deslagging
PCT/US1999/020568 WO2001020239A1 (en) 1997-01-17 1999-09-13 Device, system and method for on-line explosive deslagging

Publications (2)

Publication Number Publication Date
DK200200062U1 DK200200062U1 (da) 2002-07-02
DK200200062U4 true DK200200062U4 (da) 2003-03-28

Family

ID=27014716

Family Applications (2)

Application Number Title Priority Date Filing Date
DK99948147T DK1216391T3 (da) 1997-01-17 1999-09-13 Anordning, system og fremgangsmåde til afslagning under drift ved hjælp af sprængstof
DK200200062U DK200200062U4 (da) 1997-01-17 2002-03-07 Indretning og system til slaggefjernelse ved hjælp af online kontrolleret sprængning

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DK99948147T DK1216391T3 (da) 1997-01-17 1999-09-13 Anordning, system og fremgangsmåde til afslagning under drift ved hjælp af sprængstof

Country Status (18)

Country Link
US (3) US6321690B1 (da)
EP (2) EP1216391B1 (da)
JP (1) JP2003510544A (da)
KR (1) KR20020032575A (da)
AT (1) ATE262151T1 (da)
AU (1) AU769275B2 (da)
CA (1) CA2384334C (da)
CH (1) CH694212A5 (da)
DE (2) DE69915710T2 (da)
DK (2) DK1216391T3 (da)
ES (1) ES2217813T3 (da)
MX (1) MXNL02000011A (da)
NL (2) NL1016149C1 (da)
NZ (1) NZ517500A (da)
PL (1) PL194016B1 (da)
PT (1) PT1216391E (da)
WO (1) WO2001020239A1 (da)
ZA (1) ZA200202170B (da)

Families Citing this family (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6755156B1 (en) 1999-09-13 2004-06-29 Northamerican Industrial Services, Inc. Device, system and method for on-line explosive deslagging
US6431073B1 (en) * 1998-01-14 2002-08-13 North American Industrial Services, Inc. Device, system and method for on-line explosive deslagging
US6321690B1 (en) 1997-01-17 2001-11-27 North American Industrial Services, Inc. Device, system and method for on-line explosive deslagging
DE10103214B4 (de) * 2001-01-25 2006-06-29 Bang & Clean Gmbh Verfahren und Vorrichtung zur Reinigung von Oberflächen in Hohlräumen
DE10132517A1 (de) * 2001-07-09 2003-01-30 Hans Eichner Gmbh & Co Kg Verfahren und Vorrichtung zur lokalen Zerstörung kompakter Materialien in heissen thermischen Anlagen
US6710285B2 (en) 2002-06-01 2004-03-23 First Call Explosive Solutions, Inc. Laser system for slag removal
DE10336178A1 (de) * 2003-08-07 2005-03-03 Forster Industrie- Und Kesselreinigungsgesellschaft Mbh Anordnung zum Aufbrechen heisser Massen in Rauchgaskanälen, Nachbrennrosten und anderen dergleichen thermischen Verwertungsanlagen
DE10337299B4 (de) * 2003-08-14 2010-09-23 Gert Griesbach Einrichtung zum Auflockern von in thermischen Anlagen abgelagerten heissen Massen mittels des Sprengens
US7442034B2 (en) * 2003-12-11 2008-10-28 Shocksystem, Inc. Detonative cleaning apparatus
US7047908B2 (en) * 2003-12-11 2006-05-23 United Technologies Corporation Cooling flange
US20050125930A1 (en) * 2003-12-11 2005-06-16 Flatness Scott A. Detonative cleaning apparatus
US7104223B2 (en) * 2003-11-20 2006-09-12 United Technologies Corporation Detonative cleaning apparatus
US7267134B2 (en) * 2004-03-15 2007-09-11 United Technologies Corporation Control of detonative cleaning apparatus
US20050130084A1 (en) * 2003-12-11 2005-06-16 Aarnio Michael J. Detonative cleaning apparatus
US20050126597A1 (en) * 2003-12-11 2005-06-16 Hochstein James R.Jr. Inspection camera
JP2005172417A (ja) * 2003-11-20 2005-06-30 United Technol Corp <Utc> ガスを導く装置および内部面洗浄装置の作動方法
US7011047B2 (en) * 2003-11-20 2006-03-14 United Technologies Corporation Detonative cleaning apparatus
US20050125932A1 (en) * 2003-12-11 2005-06-16 Kendrick Donald W. Detonative cleaning apparatus nozzle
US20050125933A1 (en) * 2003-12-11 2005-06-16 Hochstein James R.Jr. Detonative cleaning apparatus
US20050126594A1 (en) * 2003-12-11 2005-06-16 Chenevert Blake C. Soot blower access apparatus
US20050126595A1 (en) * 2003-12-11 2005-06-16 Flatness Scott A. Detonative cleaning apparatus
US7360508B2 (en) * 2004-06-14 2008-04-22 Diamond Power International, Inc. Detonation / deflagration sootblower
US7959432B2 (en) * 2005-06-01 2011-06-14 Frans Steur, Senior Method of and apparatus for cleaning fouling in heat exchangers, waste-heat boilers and combustion chambers
EP2013566B1 (en) * 2006-04-28 2015-03-04 Orica Explosives Technology Pty Ltd Wireless electronic booster, and methods of blasting
US20080264357A1 (en) * 2007-04-26 2008-10-30 United Technologies Corporation Control of detonative cleaning apparatus
US8381690B2 (en) 2007-12-17 2013-02-26 International Paper Company Controlling cooling flow in a sootblower based on lance tube temperature
US7987821B2 (en) * 2008-05-30 2011-08-02 General Electric Company Detonation combustor cleaning device and method of cleaning a vessel with a detonation combustor cleaning device
KR100899991B1 (ko) * 2008-10-10 2009-05-28 주식회사 파이로 고열 방열복용 원단 적층구조 및 이를 이용해 제작된 일체형 고열 방열복
NL2007314C2 (nl) * 2011-08-29 2013-03-04 BWAdvise Inrichting en werkwijze voor het reinigen van industriele installatiecomponenten.
EP3077725B1 (en) 2013-12-02 2018-05-30 Austin Star Detonator Company Method and apparatus for wireless blasting
US9541282B2 (en) 2014-03-10 2017-01-10 International Paper Company Boiler system controlling fuel to a furnace based on temperature of a structure in a superheater section
US9927231B2 (en) * 2014-07-25 2018-03-27 Integrated Test & Measurement (ITM), LLC System and methods for detecting, monitoring, and removing deposits on boiler heat exchanger surfaces using vibrational analysis
CA2955299C (en) 2014-07-25 2017-12-12 International Paper Company System and method for determining a location of fouling on boiler heat transfer surface
FR3028027B1 (fr) * 2014-11-04 2016-12-23 Explotek Dispositif de maintien et de mise a feu d'une matiere explosive d'une chaine pyrotechnique
US9751090B2 (en) * 2015-06-01 2017-09-05 US Nitro Blasting & Environmental, LLC Methods for cleaning precipitators
CN105668055A (zh) * 2015-08-06 2016-06-15 山东省元丰节能装备科技股份有限公司 节能环保仓储装备内部活化助流装置
KR101722240B1 (ko) * 2015-11-02 2017-04-03 한국철도기술연구원 팽창재를 이용한 파쇄방법
CN106050176A (zh) * 2016-06-28 2016-10-26 中国石油集团长城钻探工程有限公司 可燃冰取心用半导体制冷复合内筒
CN106642166B (zh) * 2016-09-21 2019-10-11 北京宸控科技有限公司 一种提高混合燃气充满度及充气速度的发生罐结构
CH713804A1 (de) * 2017-05-24 2018-11-30 Bang & Clean Gmbh Vorrichtung und Verfahren zum Entfernen von Ablagerungen in Innenräumen von Behältern oder Anlagen.
CN108844397A (zh) * 2018-05-21 2018-11-20 中石化广州工程有限公司 一种在线清灰装置及具有该在线清灰装置的换热器
KR102026620B1 (ko) * 2018-10-18 2019-09-30 (주)태평양기술산업 파쇄장치
KR102042432B1 (ko) * 2018-10-18 2019-11-08 (주)태평양기술산업 무진동 파쇄장치
FI130431B (en) * 2019-06-12 2023-08-28 Lassila & Tikanoja Oyj Apparatus and method for cleaning with explosives
FI129754B (en) * 2020-02-16 2022-08-15 Konetuuli Oy DEVICE FOR ON-TIME SLAG REMOVAL
US20210341140A1 (en) 2020-05-01 2021-11-04 International Paper Company System and methods for controlling operation of a recovery boiler to reduce fouling

Family Cites Families (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE538867A (da)
US2840365A (en) 1954-06-11 1958-06-24 Springit Nv Method of breaking formation of solid deposits
GB823353A (en) 1956-09-07 1959-11-11 Du Pont Improvements in or relating to the purging of electric furnaces
FR1183569A (fr) 1957-09-30 1959-07-09 Siderurgie Fse Inst Rech Pièces poreuses en béton pour insufflation dirigée d'un fluide
LU41977A1 (da) 1962-06-30 1962-08-30
US3552259A (en) 1968-07-19 1971-01-05 Commerican Solvents Corp Process and apparatus for preparing detonating and deflagrating fuse and product
AU2082270A (en) 1970-10-07 1972-04-13 Monzino Riotinto Of Australia Limited Cooling of lances
JPS5334700B2 (da) 1972-06-22 1978-09-21
US4167139A (en) 1977-05-23 1979-09-11 Austin Powder Company Time delay primer and method of using same
US4166418A (en) 1977-05-23 1979-09-04 Austin Powder Company Time delay primer and method of making same
US4354294A (en) 1980-09-10 1982-10-19 White Consolidated Industries, Inc. Rotary wall deslagger
US4462319A (en) 1982-10-27 1984-07-31 Detector Electronics Corp. Method and apparatus for safely controlling explosions in black liquor recovery boilers
US4545411A (en) 1983-09-19 1985-10-08 Nalco Chemical Company Method and apparatus for reducing boiler sootblowing requirements
US4639381A (en) 1983-09-19 1987-01-27 Nalco Chemical Company Method for reducing fireside tube deposition and boiler sootblowing requirements
FR2567426B1 (fr) 1984-07-13 1987-04-17 Maurel Robert Procede d'enlevement de residus solides deposes sur des parois par utilisation d'un cordeau detonnant
US4769034A (en) * 1987-03-26 1988-09-06 Poley Brooks J Folded intraocular lens, method of implanting folded intraocular lens
US4756248A (en) 1987-09-28 1988-07-12 Morton Thiokol, Inc. Low mass grain support system for solid propellant rocket motors
US5056587A (en) 1990-09-07 1991-10-15 Halliburton Company Method for deslagging a boiler
US5113802A (en) 1991-03-26 1992-05-19 Union Camp Corporation Method and apparatus for removing deposit from recovery boilers
US5193491A (en) 1991-04-01 1993-03-16 Delaware Capital Formation, Inc. Cleaning system for boiler
US5196648A (en) 1991-05-30 1993-03-23 Jet Research Center, Inc. Method for deslagging a cyclone furnace
JPH06147775A (ja) 1991-12-13 1994-05-27 Nippon Steel Corp 高温大型鋼構造物の部分冷却方法
SE500136C2 (sv) 1992-03-11 1994-04-25 Exploweld Ab Anordning för inklädnad av rör medelst explosionsformning
US5211135A (en) 1992-04-23 1993-05-18 Correia Paul A Apparatus and method of deslagging a boiler with an explosive blastwave and kinetic energy
JP2787177B2 (ja) * 1992-04-30 1998-08-13 新日本製鐵株式会社 爆破装置における爆薬装填用袋体
JP2774918B2 (ja) 1993-04-30 1998-07-09 品川白煉瓦株式会社 焼却炉側壁構造
US5355844A (en) 1993-05-26 1994-10-18 Kendrick William E System for slag removal and the like
US5494004A (en) 1994-09-23 1996-02-27 Lockheed Corporation On line pulsed detonation/deflagration soot blower
US6431073B1 (en) 1998-01-14 2002-08-13 North American Industrial Services, Inc. Device, system and method for on-line explosive deslagging
US5769034A (en) * 1997-01-17 1998-06-23 Zilka; Frank Device, system and method for on-line explosive deslagging
US6321690B1 (en) 1997-01-17 2001-11-27 North American Industrial Services, Inc. Device, system and method for on-line explosive deslagging
JPH10253059A (ja) 1997-03-11 1998-09-25 Nikko Co 火薬点火発熱具用回路板の製造方法

Also Published As

Publication number Publication date
CA2384334A1 (en) 2001-03-22
US6644201B2 (en) 2003-11-11
MXNL02000011A (es) 2004-10-28
WO2001020239A1 (en) 2001-03-22
CA2384334C (en) 2006-02-07
DE69915710T2 (de) 2005-03-17
NL1016148A1 (nl) 2001-03-13
ATE262151T1 (de) 2004-04-15
US20020112638A1 (en) 2002-08-22
EP1216391B1 (en) 2004-03-17
DE69915710D1 (de) 2004-04-22
EP1452813A2 (en) 2004-09-01
DK200200062U1 (da) 2002-07-02
US20010007247A1 (en) 2001-07-12
AU769275B2 (en) 2004-01-22
DE10044991A1 (de) 2001-08-16
AU6138299A (en) 2001-04-17
NZ517500A (en) 2004-02-27
EP1452813A3 (en) 2004-09-15
ES2217813T3 (es) 2004-11-01
NL1016148C2 (nl) 2001-04-23
KR20020032575A (ko) 2002-05-03
US6321690B1 (en) 2001-11-27
PL352884A1 (en) 2003-09-22
CH694212A5 (de) 2004-09-15
EP1216391A1 (en) 2002-06-26
PT1216391E (pt) 2004-07-30
DK1216391T3 (da) 2004-07-26
PL194016B1 (pl) 2007-04-30
JP2003510544A (ja) 2003-03-18
NL1016149C1 (nl) 2000-10-19
ZA200202170B (en) 2003-02-26

Similar Documents

Publication Publication Date Title
DK200200062U4 (da) Indretning og system til slaggefjernelse ved hjælp af online kontrolleret sprængning
EP1067349B1 (en) Device, system and method for on-line explosive deslagging
TW365643B (en) Method for cooling a furnace, and furnace provided with a cooling device
DK0927707T3 (da) Fremgangsmåde og indretning til afköling af röggas fra en ovns omlöb
NO169198C (no) Fremgangsmaate og anordning for avkjoeling av en beholder
JPS56126674A (en) Auxiliary stater of diesel engine
DK1275925T3 (da) Fremgangsmåde og indretning til lokal ödelæggelse af kompakte materialer i varme termiske anlæg
PL352089A1 (en) Method of and apparatus for operation of arc and/or resistance melting furnaces
DE20320840U1 (de) Vorrichtung zum Abschrecken und Wärmebehandeln eines Gussteils
BR9811669A (pt) Aparelho e método para o resfriamento de um anel de munhão de forno a oxigênio básico
FI952384L (fi) Laite lämm¦n talteenottamiseksi kuumista prosessikaasuista
ZA987386B (en) Method and apparatus for quenching and cooling a hot residue from a dross treatment furnace
SE8403556L (sv) Forfarande for reglering av ett metallsmeltbads temperatur
IT1275025B (it) Metodo e dispositivo per mantenere, in un forno rotativo, i metalli fusi in temperatura per lungo tempo senza provocare variazioni di analisi e con un consumo energetico molto contenuto
JPS5227096A (en) Apparatus for heat recovery of molten slag
JPS5375104A (en) Auxiliary combustion apparatus for cupola
ITBO930088A0 (it) Apparato di regolazione della temperatura operativa di un dispositi- vo saldatore.
GB9924802D0 (en) Cooling apparatus
UA10918C2 (uk) Спосіб термічhої обробки дроту та пристрій для його здійсhеhhя
SU587167A1 (ru) Башенна печь
JPS53132410A (en) Heat holding method for hot stove
JPS5784984A (en) Cooling water circulation circuit for exhaust gas from metallurgical furnace

Legal Events

Date Code Title Description
UUP Utility model expired