EP1094275A1 - Abgasrückführventil - Google Patents

Abgasrückführventil Download PDF

Info

Publication number
EP1094275A1
EP1094275A1 EP00122222A EP00122222A EP1094275A1 EP 1094275 A1 EP1094275 A1 EP 1094275A1 EP 00122222 A EP00122222 A EP 00122222A EP 00122222 A EP00122222 A EP 00122222A EP 1094275 A1 EP1094275 A1 EP 1094275A1
Authority
EP
European Patent Office
Prior art keywords
control member
flow control
ducts
hole
valve according
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Withdrawn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
EP00122222A
Other languages
English (en)
French (fr)
Inventor
Mauro Poppi
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.)
IPEG SpA dell'Ing Mauro Poppi
Original Assignee
IPEG SpA dell'Ing Mauro Poppi
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 IPEG SpA dell'Ing Mauro Poppi filed Critical IPEG SpA dell'Ing Mauro Poppi
Publication of EP1094275A1 publication Critical patent/EP1094275A1/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L13/00—Construction of valves or dampers for controlling air supply or draught
    • F23L13/02—Construction of valves or dampers for controlling air supply or draught pivoted about a single axis but having not other movement

Definitions

  • the present invention relates to a reduction valve for hot air ducts, particularly for supply units for high heat release burners of kilns.
  • Supply units for combustion air for high heat release burners of ceramic kilns are known and have already been disclosed in EPA 99125334.5 by the same Applicant; they allow to use, as comburent air, hot air produced and recovered inside the ceramic factory itself, e.g. air taken from cogeneration systems or from the cooling sections of the kilns themselves.
  • These supply units substantially comprise a combustion chamber, which is penetrated by a stem for injecting the gaseous fuel and is connected to a cold air tube with a first reduction valve interposed, and a hot air duct, whose outlet is connected to the combustion chamber downstream of the first valve and is provided with a second adjustable reduction valve.
  • the coordinated adjustment of said two valves allows to use cold air to ensure cooling of the ignition and flame control systems, as prescribed by safety standards, and on the other hand allows to use exclusively hot air as comburent.
  • valves are in fact currently of the butterfly type and are made of metallic materials resistant to high temperatures, such as alloy steel.
  • the hot air circulating in them can reach an average temperature on the order of 500°C, which causes significant expansions of the elements that compose the valve; if said elements are coupled with small tolerances, in order to ensure perfect fluid-tightness, the valve jams and thus loses its functionality and causes a state of tension which can trigger its cracking.
  • the aim of the present invention is to eliminate the above noted drawbacks of conventional types of valve by providing a reduction valve for hot air ducts, particularly for supply units for high heat release burners of kilns, which allows to eliminate the risks of jamming and breakage, maintains its functionality unchanged and ensures tightness with respect to the hot air that flows through it regardless of the temperature conditions reached by said air.
  • an object of the present invention is to provide a structure which is simple, relatively easy to provide in practice, safe in use, effective in operation, and relatively low in cost.
  • the present reduction valve for hot air ducts particularly for supply units for high heat release burners of kilns, characterized in that it is made of refractory material and comprises a hollow element the opposite longitudinal ends whereof can be connected to the ends of respective ducts and an adjustable flow control member which can be inserted hermetically and transversely in said element, the relative position of the flow control member with respect to the hollow element being adapted to determine and adjust the flow-rate of hot air in the ducts.
  • 1 generally designates a reduction valve for hot air ducts inserted in the supply unit 2 of a high heat release burner 3 of a kiln 4.
  • the reduction valve 1 is made of refractory material in order to ensure its regular operation regardless of the temperature conditions of the hot air that flows through it.
  • the valve 1 is constituted by a hollow element 5, whose opposite longitudinal ends are respectively connected to the ends of first and second ducts 6, and by an adjustable flow control member 7 which can be inserted transversely and hermetically in the hollow element 5.
  • the first and second ducts 6 convey the hot combustion air, recovered for example from the cooling regions of the kiln 4, into the combustion chamber 8 of the burner 3; the relative position of the flow control member 7 with respect to the hollow element 5 determines and adjusts the flow-rate of hot air introduced by the ducts 6 into the chamber 8.
  • the chamber 8 is connected to a cold air duct 9, the tubular stem 10 entering said chamber while being further connected to a respective duct 11 for feeding fuel.
  • the hollow element 5 is constituted by a hollow cylinder 12 which is advantageously made of refractory material and is arranged between the first and second ducts 6 and is substantially coaxial thereto.
  • the hollow cylinder 12 is laterally provided with a transverse dead hole 13 in which the flow control member 7 can be inserted hermetically.
  • the walls 14 of the dead hole 13 are substantially inclined and converge towards the bottom 15, which instead has a cylindrical shape.
  • the flow control member 7 is constituted by a hollow body 16 which is conveniently made of refractory material and is crossed at its central region by a transverse through hole 17.
  • the end that lies outside the dead hole 13 ( Figures 1 and 2) is provided with a closure cap 18 on which grip means 19 are formed.
  • the hollow body 16 is substantially frustum-shaped and the cap 18 is arranged at its larger end.
  • the maximum dimensions of the through hole 17 correspond to the internal dimensions of the transverse cross-section of the hollow cylinder 12, and the alignment of the through hole 17 with the hollow cylinder 12 corresponds to the maximum flow-rate of hot air; starting from this configuration, a partial rotation of the flow control member 7 inside the dead hole 13 produces a corresponding partial closure of the through hole 17 and of the hollow cylinder 12 and accordingly leads to a reduction in the flow-rate of hot air introduced in the chamber 8.
  • the flow control member 7 can further be associated with actuation and adjustment means of the automatic type, which are not shown in the above figures since they are of the conventional type.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Furnace Details (AREA)
EP00122222A 1999-10-21 2000-10-16 Abgasrückführventil Withdrawn EP1094275A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1999MO000236A IT1310862B1 (it) 1999-10-21 1999-10-21 Valvola parzializzatrice per condotti di aria calda, particolarmenteper gruppi di alimentazione per bruciatori intensivi di forni
ITMO990236 1999-10-21

Publications (1)

Publication Number Publication Date
EP1094275A1 true EP1094275A1 (de) 2001-04-25

Family

ID=11387104

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00122222A Withdrawn EP1094275A1 (de) 1999-10-21 2000-10-16 Abgasrückführventil

Country Status (2)

Country Link
EP (1) EP1094275A1 (de)
IT (1) IT1310862B1 (de)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3459213A (en) * 1965-10-19 1969-08-05 Duriron Co Coated hollow plug valve
US3662986A (en) * 1970-02-25 1972-05-16 Raymond J Domulewicz Sr Stopper block
US3698422A (en) * 1970-05-06 1972-10-17 Union Pump Co Lined plug valve
US3868211A (en) * 1974-01-11 1975-02-25 Aqua Chem Inc Pollutant reduction with selective gas stack recirculation
DE2615041A1 (de) * 1976-04-07 1977-10-20 Stober & Morlock Absperrklappe fuer einen heisse gase, insbesondere rauchgase fuehrenden kanal
DE2944361A1 (de) * 1979-11-02 1981-05-14 Gerhard 6056 Heusenstamm Böttcher Absperrschieber mit belueftung des abgasrohres
US5046703A (en) * 1987-11-24 1991-09-10 Toyo Tanso Co., Ltd. Carbonaceous sintered compact and fluid sealing member with this contact

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3459213A (en) * 1965-10-19 1969-08-05 Duriron Co Coated hollow plug valve
US3662986A (en) * 1970-02-25 1972-05-16 Raymond J Domulewicz Sr Stopper block
US3698422A (en) * 1970-05-06 1972-10-17 Union Pump Co Lined plug valve
US3868211A (en) * 1974-01-11 1975-02-25 Aqua Chem Inc Pollutant reduction with selective gas stack recirculation
DE2615041A1 (de) * 1976-04-07 1977-10-20 Stober & Morlock Absperrklappe fuer einen heisse gase, insbesondere rauchgase fuehrenden kanal
DE2944361A1 (de) * 1979-11-02 1981-05-14 Gerhard 6056 Heusenstamm Böttcher Absperrschieber mit belueftung des abgasrohres
US5046703A (en) * 1987-11-24 1991-09-10 Toyo Tanso Co., Ltd. Carbonaceous sintered compact and fluid sealing member with this contact

Also Published As

Publication number Publication date
ITMO990236A1 (it) 2001-04-21
IT1310862B1 (it) 2002-02-22
ITMO990236A0 (it) 1999-10-21

Similar Documents

Publication Publication Date Title
US4298333A (en) Industrial heating installation and method of operation
US6702571B2 (en) Flex-flame burner and self-optimizing combustion system
CA1159353A (en) Recuperative burners
CA1100029A (en) Premix gas burner assembly for copper melting furnace
US6176702B1 (en) Simple remotely tuned solid core fuel jet, low NOx fuel gas burner
EP1094275A1 (de) Abgasrückführventil
US4536152A (en) High-velocity gas burners
CN2890657Y (zh) 蓄热式脉冲烧嘴
CN109556110A (zh) 用于产生热水或蒸汽的锅炉
RU2766115C2 (ru) Горелка для сжигания газообразного топлива в шахтной печи, преимущественно для термической обработки минералов в гранулированной форме
CN113195976B (zh) 用于喷射气态燃烧剂物的组件和方法
US20040096794A1 (en) Radiant tube gas burner
AU573863B2 (en) Gas burner
EP1016822A1 (de) Verbennungsluftzuführ für Ofenbrenner mit hoher Wärmeabgabe
JP7555927B2 (ja) ガス状燃焼剤噴射アセンブリ及び方法
RU2432530C1 (ru) Горелка для сжигания газообразного и/или жидкого топлива с пониженным выбросом окислов азота
CN110500584A (zh) 高热值燃料低氮单蓄热烧嘴
RU98537U1 (ru) Горелка для сжигания газообразного и/или жидкого топлива с пониженным выбросом окислов азота
CN220602159U (zh) 一种罐式煅烧炉烘炉用小炉罩
RU37545U1 (ru) Устройство газогорелочное
SU1703916A1 (ru) Горелочное устройство
KR19990012144U (ko) 라디안트튜브의 흡입공기 제어용 댐퍼
CN110145741A (zh) 一种适用于多种热值煤气的富氧烧嘴
KR100186972B1 (ko) 가스버너
EP0844435A1 (de) Gasbrenner

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: A1

Designated state(s): DE ES FR IT PT

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20010921

AKX Designation fees paid

Free format text: DE ES FR IT PT

17Q First examination report despatched

Effective date: 20030429

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

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: 20041116