EP1479973A2 - Méthode et procédé pour controler l'étanchéité d'un tube radiant équipé de brûleur à gaz - Google Patents

Méthode et procédé pour controler l'étanchéité d'un tube radiant équipé de brûleur à gaz Download PDF

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Publication number
EP1479973A2
EP1479973A2 EP04011332A EP04011332A EP1479973A2 EP 1479973 A2 EP1479973 A2 EP 1479973A2 EP 04011332 A EP04011332 A EP 04011332A EP 04011332 A EP04011332 A EP 04011332A EP 1479973 A2 EP1479973 A2 EP 1479973A2
Authority
EP
European Patent Office
Prior art keywords
burner
signal
exhaust gas
exhaust
cooling air
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.)
Granted
Application number
EP04011332A
Other languages
German (de)
English (en)
Other versions
EP1479973A3 (fr
EP1479973B1 (fr
Inventor
Wolfgang Dr. Harbeck
Jürgen Noack
René Lohr
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.)
Noxmat GmbH
Original Assignee
NOXMAT GmbH
AICHELIN ENTWICKLUNGSZENTRUM U
Aichelin Entwicklungszentrum und Aggregatebau GmbH
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 NOXMAT GmbH, AICHELIN ENTWICKLUNGSZENTRUM U, Aichelin Entwicklungszentrum und Aggregatebau GmbH filed Critical NOXMAT GmbH
Priority to PL04011332T priority Critical patent/PL1479973T3/pl
Publication of EP1479973A2 publication Critical patent/EP1479973A2/fr
Publication of EP1479973A3 publication Critical patent/EP1479973A3/fr
Application granted granted Critical
Publication of EP1479973B1 publication Critical patent/EP1479973B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F23N5/245—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electrical or electromechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C3/00—Combustion apparatus characterised by the shape of the combustion chamber
    • F23C3/002—Combustion apparatus characterised by the shape of the combustion chamber the chamber having an elongated tubular form, e.g. for a radiant tube
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F23N5/242—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2231/00—Fail safe
    • F23N2231/18—Detecting fluid leaks

Definitions

  • the invention relates to a method and a device for Monitoring the tightness of a burner fired by a gas burner Beam pipe.
  • Gas fired ceramic radiant tubes find in particular Industrial furnaces because of the long life a constantly rising Distribution.
  • a disadvantage of using ceramic radiant tubes is that in case of damage the jet breaks and immediately a large free cross-section is provided to the furnace room. A damage of the jet pipe is so far not easy recognizable and can lead to significant disadvantages in the process, because the furnace atmosphere is changed accordingly. Also surrender Significant safety problems.
  • From US-A-4 508 501 is also a for monitoring the Tightness of a radiant tube fired by a gas burner known, in which by a control of the burner, the oxygen content is monitored in the exhaust stream of the burner. at Deviation from a given setpoint becomes an error signal output.
  • monitoring requires tightness the jet pipe a complex monitoring of the gas composition, which is complicated and expensive and also the problem includes the aging of sensors.
  • the invention is therefore based on the object, a method and a device for monitoring the tightness of one of To create a gas burner fueled jet pipe, which a simple and inexpensive construction and a fast Response in case of error results.
  • This task is performed by a method of monitoring the Tightness of a radiant tube fired by a gas burner solved, is monitored at the switch-on state of the burner and a burner signal indicative of the on state is generated, the at least the conditions BURNER OFF when off Burner and BURNER ON with the burner switched on can take, in which also the exhaust gas flow of the burner is monitored and derived therefrom, an exhaust gas signal, the at least the conditions exhaust off if not sufficient Volume flow of flowing exhaust gas and exhaust gas on when properly can assume effluent exhaust gas, and wherein the burner signal and the exhaust signal are linked to one another at a not permissible combination of the burner signal and the exhaust gas signal to output an error signal.
  • the object of the invention is further achieved by a device for monitoring the tightness of a burner fired by a gas burner Beam tube solved, with a sensor for monitoring the Exhaust stream of the burner, which exceeds a predetermined Threshold a characteristic exhaust gas signal outputs and with a monitoring circuit, the exhaust signal and an indicative of the on-state of the burner Burner signal are supplied, and in an improper Combination of burner signal and exhaust signal an error signal outputs.
  • the burner signal can be approximately from the on / off switch of the burner are derived, provided that they only indicate the switch-on state should.
  • a derivative of a control is preferred of the burner, which is usually not just a power-on state of the burner, but also a correct one at the same time Work of the burner monitors what is caused by a signal BURNER ON is displayed.
  • the burner signal a separate monitoring device in Shape of a sensor, e.g. a flame sensor to provide.
  • the monitoring of the exhaust gas flow can be approximately through a volumetric Measurement, by a differential pressure measurement, by a flow velocity measurement with an inductive or ultrasonic method or monitored by a pressure probe measurement become.
  • a particularly simple embodiment results when the exhaust gas flow by means of a differential pressure method by constriction of the Flow cross section by means of a throttle device, in particular is monitored by means of a differential pressure diaphragm. It Then a differential pressure measurement between the input and the output of the throttle device are performed. Lies the measured differential pressure below a predetermined Threshold value, the received exhaust gas signal is turned OFF set. If the differential pressure is higher, then that is the case Exhaust gas signal exhaust gas ON.
  • a threshold in this case, for example, a value of 10 mbar, preferably of 5 mbar, more preferably of 3 mbar, in particular of 2 mbar, between input and output of the differential pressure diaphragm be used.
  • an exhaust gas signal of sufficient size is measured, without that is characteristic of turning on the burner Signal BRENNER ON, so it can be assumed that at a broken jet pipe through an exhaust fan one way high volume flow through the leaking jet pipe from the furnace is sucked off, that the signal is emitted exhaust gas.
  • monitoring can also be performed if the burner is switched off and in cooling air mode for the Beam pipe for cooling the furnace chamber works, the cooling air
  • the burner operating as combustion air serves. This can also be in the off state of Brenners running fan supply the cooling air. possibly can be mounted on the burner a separate cooling air line be guided over the additional cooling air into the jet pipe is to achieve a stronger furnace cooling.
  • cooling air and possibly the additional cooling air can be monitored and derived therefrom cooling air signal and possibly additional cooling air signal associated with the exhaust gas signal be an error signal in case of an impermissible combination issue.
  • Fig. 1 is an industrial furnace, which is gas-fired Beam pipe is heated and with a monitoring device according to the invention for monitoring the tightness of the jet pipe is equipped, shown schematically and in total with the Numeral 10 designates.
  • the industrial furnace 10 has a merely schematic with a dash-dotted line indicated furnace chamber 11, the is heated by a gas burner 12.
  • the gas burner 12 has a projecting into the oven chamber 11 jet pipe 14 in Shape of a jacket tube.
  • the returned via the jet pipe 14 Exhaust gases arrive via a purely schematic indicated output of the jet pipe 14 in an exhaust pipe 18th and are directed into an exhaust passage 20.
  • a differential pressure diaphragm 22 is in the exhaust pipe 18 inserted.
  • a pressure measuring device 24 connected via measuring lines 26.
  • Results in properly working burner 12 a differential pressure Ap sufficient size of e.g. 2 mbar, it can be assumed that no leakage of the jet pipe 14 is present. Otherwise, an error signal is generated.
  • This is a monitoring circuit provided, which only schematically with the Paragraph 38 is indicated.
  • the monitoring circuit 38 becomes the from the pressure measuring device 24 obtained exhaust gas signal 34 and the burner signal 32 obtained from the burner controller 28 fed. From the monitoring circuit 38 is an output signal 36 generates, in the simplest case, only the states OK or FAIL.
  • the exhaust gas signal 34 obtained from the pressure measuring device 24 likewise, in the simplest case, only the states EXHAUST EXHAUST ON or EXHAUST OFF.
  • the burner signal 32 preferably designed as a binary signal, the only accept the conditions BURNER ON and BURNER OFF can.
  • the output 36 obtained in response to the various possible combinations of the burner signal 32 and the exhaust signal 34 could then be represented by a truth table, for example, as shown in Table 1 below.
  • the input signals have a "0" for the status OFF or LOW, so BURNER OFF or EXHAUST OFF and a "1" for the state ON or HIGH, so BURNER ON or exhaust gas ON.
  • the output signal is a "0" for the state OK or OK, while a "1" indicates an error.
  • cooling air flow combustion air volume flow
  • combustion air volume flow combustion air volume flow
  • a differential pressure measurement be monitored to a signal COOL AIR ON or COOLING AIR to produce, whereby the flow of cooling air or the missing flow of cooling air is indicated.
  • the flow of additional cooling air can be monitored be a signal ZUSATZKÜHLLUFT ON or
  • SUPPLEMENTARY COOLING AIR to generate, which is a flow of additional cooling air or indicates a lack of flow of additional cooling air.
  • Table 2 shows possible states that may result when the burner is switched off in cooling mode.
  • a "1"("0") means the signal COOLING AIR ON (COOLING AIR OFF) and, for the auxiliary cooling air signal, a "1"("0") the signal AUC.
  • COOLING AIR ON (ADDITIONAL COOLING AIR OFF).
  • Brenner signal Cooling air signal Additional cooling air signal exhaust signal output 0 1 0 1 0 0 1 0 0 1 0 0 1 0 1 0 1 1 0 1 0 1 1 0 0 0 1 1 0 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
  • inventive method and the inventive device for monitoring any Beam pipes can be used. So it can, for example, coat-jet pipes, P-beam tubes and double P-beam tubes monitored become. But even with through and U-beam tubes that can inventive principle can be used. In this case, the exhaust gas flow at the exit of the passage of the U-tube by means of Differential pressure and the pressure measuring device monitors.
  • FIG. 2 One possible embodiment for the monitoring circuit 38 with conventional components is shown in Fig. 2. With this Monitoring circuit 38 only then becomes an error signal output when the combination BURNER ON and EXHAUST OFF is obtained. In addition, however, here is a light button intended to display and acknowledge the error message.
  • the monitoring circuit 38 may, for example, in a separate Housing be housed, in addition to each assigned Burner is housed.
  • the monitoring circuit 38 has an input 56 for the from the burner control 28 received burner signal (220 V signal) the states BURNER ON or BURN OFF take on can.
  • This input 56 is connected to a relay K1, the with its control circuit 40 at the other end to the neutral conductor N. connected via port 64.
  • a relay K2 connected to its control circuit 42, in series with the make contact 41 of the relay K1 and in series with the pressure measuring device 24, the over the connections 58 and 60 are connected and the one over Line 50 with the 220 received from the burner control 28th V-phase connected via the connector 62 connected is.
  • the pressure measuring device 24 opens the in Fig. 2 schematically indicated normally closed contact when the differential pressure the preset threshold of e.g. Exceeds 2 mbar.
  • an indicator lamp 44 Parallel to the control circuit 42 of the relay K2 is an indicator lamp 44 connected, with one end to the neutral is located and with its other end via the control circuit 43 of the Relay K2 and a button 46 with the line 50 and the connection 62, that is connected to the 220V phase.
  • the indicator lamp 44 is parallel to the control circuit 42 of the relay K2 connected.
  • the burner signal BRENNER ON is received and the exhaust gas signal is missing, i.e. opens the normally closed contact of the pressure measuring device 24 the connection between the circuit 41 of the relay K1 and the line 50 not, it will be lit by the Indicator lamp 44 is displayed, and there is an error signal on Output 66 output.
  • the error signal can be activated by the button 46 be acknowledged.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion Of Fluid Fuel (AREA)
  • Regulation And Control Of Combustion (AREA)
EP04011332A 2003-05-21 2004-05-13 Méthode et procédé pour controler l'étanchéité d'un tube radiant équipé de brûleur à gaz Expired - Lifetime EP1479973B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL04011332T PL1479973T3 (pl) 2003-05-21 2004-05-13 Sposób i urządzenie do kontroli szczelności opalanej palnikiem gazowym rury promieniującej

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10324299 2003-05-21
DE10324299A DE10324299B3 (de) 2003-05-21 2003-05-21 Verfahren und Vorrichtung zur Überwachung der Dichtheit eines von einem Gasbrenner befeuerten Strahlrohres

Publications (3)

Publication Number Publication Date
EP1479973A2 true EP1479973A2 (fr) 2004-11-24
EP1479973A3 EP1479973A3 (fr) 2008-03-05
EP1479973B1 EP1479973B1 (fr) 2013-03-27

Family

ID=33039336

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04011332A Expired - Lifetime EP1479973B1 (fr) 2003-05-21 2004-05-13 Méthode et procédé pour controler l'étanchéité d'un tube radiant équipé de brûleur à gaz

Country Status (4)

Country Link
US (1) US20040265759A1 (fr)
EP (1) EP1479973B1 (fr)
DE (1) DE10324299B3 (fr)
PL (1) PL1479973T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2292976A3 (fr) * 2009-09-02 2012-11-21 LOI Thermprocess GmbH Dispositif de chauffage par rayonnement

Families Citing this family (7)

* Cited by examiner, † Cited by third party
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US10508807B2 (en) * 2014-05-02 2019-12-17 Air Products And Chemicals, Inc. Remote burner monitoring system and method
US10113770B2 (en) * 2014-12-11 2018-10-30 Rinnai Corporation Warm air heater
CN110967147B (zh) * 2018-09-28 2021-12-17 宝山钢铁股份有限公司 退火炉破损辐射管的在线查找方法
CN110672789A (zh) * 2019-09-11 2020-01-10 唐山钢铁集团有限责任公司 一种退火炉w型辐射管泄漏的在线检测方法
CN113358299A (zh) * 2021-05-13 2021-09-07 武汉钢铁有限公司 冷轧连续退火炉辐射管破损快速检测方法
CN114383160A (zh) * 2021-12-23 2022-04-22 广东万和新电气股份有限公司 防燃气泄漏方法、控制器及系统
CN117030158B (zh) * 2023-09-28 2023-12-26 江苏华业特钢制造有限公司 一种辐射管焊缝气密性检测装置

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FR2607905B1 (fr) * 1986-12-05 1990-01-26 Pramata Dispositif de verification de l'etat des fumees d'un generateur de chaleur ou de force brulant un combustible
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2292976A3 (fr) * 2009-09-02 2012-11-21 LOI Thermprocess GmbH Dispositif de chauffage par rayonnement

Also Published As

Publication number Publication date
DE10324299B3 (de) 2004-12-23
EP1479973A3 (fr) 2008-03-05
PL1479973T3 (pl) 2013-08-30
EP1479973B1 (fr) 2013-03-27
US20040265759A1 (en) 2004-12-30

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