EP0030985A1 - Système pneumatique pour le transport de cendre et système de stockage - Google Patents

Système pneumatique pour le transport de cendre et système de stockage Download PDF

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Publication number
EP0030985A1
EP0030985A1 EP79105289A EP79105289A EP0030985A1 EP 0030985 A1 EP0030985 A1 EP 0030985A1 EP 79105289 A EP79105289 A EP 79105289A EP 79105289 A EP79105289 A EP 79105289A EP 0030985 A1 EP0030985 A1 EP 0030985A1
Authority
EP
European Patent Office
Prior art keywords
tank
fines
flyash
gases
pressure
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Withdrawn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
EP79105289A
Other languages
German (de)
English (en)
Inventor
Joseph Gerard Singer
Harold Edward Collins
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.)
Lummus Crest SARL
Original Assignee
Lummus Crest SARL
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 Lummus Crest SARL filed Critical Lummus Crest SARL
Priority to EP79105289A priority Critical patent/EP0030985A1/fr
Publication of EP0030985A1 publication Critical patent/EP0030985A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
    • F23J3/06—Systems for accumulating residues from different parts of furnace plant

Definitions

  • Dust explosions are a hazard to be reckoned with wherever there is an accumulation of fine particles in a partially closed area, where small amounts of oxygen are present. Elevated temperatures add to the problem.
  • One such area is the flyash silo at the tail end of a solid-fuel-fired boiler, where the fine ash particles are allowed to settle out of the combustion gases leaving the boiler.
  • apparatus including an enclosed pressurized conveying and storage system that will allow potentially explosive flyash to be handled with the minimum possibility of damage to the equipment.
  • the storage tank or vessel is maintained under inert gas, under slightly pressurized conditions by means of an inert gas source and pressure relief valves.
  • An elevated temperature is also maintained in the storage tank to prevent formation of corrosive acids.
  • Airlocks are used to introduce and withdraw the flyash from the system.
  • the figure is a schematic of a conveying and storage system for flyash constructed in accordance with the invention.
  • numeral 10 designates a steel vessel designed for an elevated pressure, such as 5 psig, to receive and contain flyash, or other potentially explosive fine materials.
  • the elevated design pressure is for the purpose of allowing moderate excursions in system operating pressure, or "puff" (low-pressure-level explosions) without resulting in a discharge of the material to atmosphere.
  • the vessel or tank 10 is provided with a pressure-actuated mechanical relief device 12 to prevent failure of the tank in the event of a high-pressure explosion.
  • the relief device 12 is in an outlet pipe 14 which extends high enough to prevent the discharge of material in any area where operating personnel can be affected.
  • the tank 10 is kept at a temperature of approximately 300°F by means of a heating device, such as an inductance heating coil 16, such that no condensation of the conveying gases take place, which could result in the formation of corrosive acids in the tank 10.
  • a heating device such as an inductance heating coil 16
  • the heat in the tank is retained by a layer of insulation 18, which completely encompasses the tank 10.
  • the tank 10 can be provided with fluidizing means in the form of perforated plates 20, through which inert gas in introduced, to cause the accumulated flyash to flow freely through discharge opening 22 when the tank is being emptied.
  • the outlet 22 contains a flap-type or rotary airlock 24, to allow the flyash to be discharged while preventing air from entering and the gases within the tank from escaping.
  • the equipment for collecting the fine flyash from the combustion gases flowing in duct 26 includes a series of ash hoppers 28, located in a mechanical or electrostatic dust collector 30.
  • the gas flowing through duct 26 is usually at a partial vacuum.
  • the ash conveying system includes pipe 32, containing fans 34 for pressurizing the conveying system.
  • the outlets 36 from the ash hoppers each contain a rotary airlock 38 for separating the two differential pressure flow systems while permitting the ash to be discharged into pipe 40.
  • Dampers 42 are used to close the piping when the fans 34 are not in operation, preventing reverse flow therethrough.
  • Control valve 44 keeps the storage tank 10 within a given pressure range, for example one to fifteen inches water gage.
  • a spring-loaded pressure relief valve 48 is set to relieve pressure when it exceeds the desired given range.
  • the piping 50 containing this valve can direct the gases back to the duct 26 upstream of the dust collector 30.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gasification And Melting Of Waste (AREA)
EP79105289A 1979-12-20 1979-12-20 Système pneumatique pour le transport de cendre et système de stockage Withdrawn EP0030985A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP79105289A EP0030985A1 (fr) 1979-12-20 1979-12-20 Système pneumatique pour le transport de cendre et système de stockage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP79105289A EP0030985A1 (fr) 1979-12-20 1979-12-20 Système pneumatique pour le transport de cendre et système de stockage

Publications (1)

Publication Number Publication Date
EP0030985A1 true EP0030985A1 (fr) 1981-07-01

Family

ID=8186261

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79105289A Withdrawn EP0030985A1 (fr) 1979-12-20 1979-12-20 Système pneumatique pour le transport de cendre et système de stockage

Country Status (1)

Country Link
EP (1) EP0030985A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1172127A3 (fr) * 2000-07-11 2002-06-12 Messer Griesheim Gmbh Appareil et procédé pour le stockage et le traitement d'objets endessous des conditions inertes
EP2857747A4 (fr) * 2012-05-30 2015-12-23 Tsukishima Kikai Co Procédé pour transporter des impuretés dans un système de four fluidisé mis sous pression

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT67159B (de) * 1912-08-26 1914-12-10 R Kutsche Fa Ascheentleerungsvorrichtung.
DE427745C (de) * 1924-10-16 1926-04-13 Mueller Arno Verfahren und Vorrichtung zum Abziehen von Flugasche mittels Rauchgas-Saugzuges
DE464326C (de) * 1928-08-21 Babcock & Wilcox Dampfkessel W Zellenrad zum Entfernen der Asche bei Kohlenstaubfeuerungen
US2538320A (en) * 1948-01-29 1951-01-16 Allen Sherman Hoff Co Rotary valve
AT175004B (de) * 1950-10-27 1953-05-26 Waagner Biro Ag Fliehkraftabscheider, insbesondere zur Rauchgasreinigung in Verbindung mit Wärmeaustauschern
AT177496B (de) * 1948-11-22 1954-02-10 Walther & Cie Ag Taschenlufterhitzer
AT267030B (de) * 1965-09-01 1968-12-10 Mediterranea Compagnia Ind Com Vorrichtung zur Reinigung von Rauch, Abgasen, Luft, anderen Gasströmen u.dgl.
CH539563A (de) * 1971-10-27 1973-07-31 Uerdingen Ag Waggonfabrik Behälter zur Aufnahme von staubförmigem Gut
FR2202824A1 (fr) * 1972-10-13 1974-05-10 Polysius Ag
DE2454395A1 (de) * 1974-11-16 1976-05-26 Bergwerksverband Gmbh Verfahren zur verhinderung von sauerstoffzutritt beim transport und bei der bunkerung gemahlener kokskohle
US4081110A (en) * 1977-01-03 1978-03-28 Whitlock, Inc. Flexible membrane discharge for vacuum hopper
DE2819184A1 (de) * 1977-05-02 1978-11-16 Appa Thermal Exchanges Ltd Fliessbett-verbrennungsvorrichtung mit ascheentfernungseinrichtung

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE464326C (de) * 1928-08-21 Babcock & Wilcox Dampfkessel W Zellenrad zum Entfernen der Asche bei Kohlenstaubfeuerungen
AT67159B (de) * 1912-08-26 1914-12-10 R Kutsche Fa Ascheentleerungsvorrichtung.
DE427745C (de) * 1924-10-16 1926-04-13 Mueller Arno Verfahren und Vorrichtung zum Abziehen von Flugasche mittels Rauchgas-Saugzuges
US2538320A (en) * 1948-01-29 1951-01-16 Allen Sherman Hoff Co Rotary valve
AT177496B (de) * 1948-11-22 1954-02-10 Walther & Cie Ag Taschenlufterhitzer
AT175004B (de) * 1950-10-27 1953-05-26 Waagner Biro Ag Fliehkraftabscheider, insbesondere zur Rauchgasreinigung in Verbindung mit Wärmeaustauschern
AT267030B (de) * 1965-09-01 1968-12-10 Mediterranea Compagnia Ind Com Vorrichtung zur Reinigung von Rauch, Abgasen, Luft, anderen Gasströmen u.dgl.
CH539563A (de) * 1971-10-27 1973-07-31 Uerdingen Ag Waggonfabrik Behälter zur Aufnahme von staubförmigem Gut
FR2202824A1 (fr) * 1972-10-13 1974-05-10 Polysius Ag
DE2454395A1 (de) * 1974-11-16 1976-05-26 Bergwerksverband Gmbh Verfahren zur verhinderung von sauerstoffzutritt beim transport und bei der bunkerung gemahlener kokskohle
US4081110A (en) * 1977-01-03 1978-03-28 Whitlock, Inc. Flexible membrane discharge for vacuum hopper
DE2819184A1 (de) * 1977-05-02 1978-11-16 Appa Thermal Exchanges Ltd Fliessbett-verbrennungsvorrichtung mit ascheentfernungseinrichtung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1172127A3 (fr) * 2000-07-11 2002-06-12 Messer Griesheim Gmbh Appareil et procédé pour le stockage et le traitement d'objets endessous des conditions inertes
EP2857747A4 (fr) * 2012-05-30 2015-12-23 Tsukishima Kikai Co Procédé pour transporter des impuretés dans un système de four fluidisé mis sous pression
US10001277B2 (en) 2012-05-30 2018-06-19 Tsukishima Kikai Co., Ltd. Method for conveying impurities in pressurized fluidized bed incinerator system

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

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AK Designated contracting states

Designated state(s): DE FR GB SE

17P Request for examination filed

Effective date: 19810612

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: 19821007

RIN1 Information on inventor provided before grant (corrected)

Inventor name: COLLINS, HAROLD EDWARD

Inventor name: SINGER, JOSEPH GERARD