EP0082867A1 - Verfahren zur früherkennung von schwelbränden in braunkohlenstaub enthaltenden behältern durch detektion von methan - Google Patents

Verfahren zur früherkennung von schwelbränden in braunkohlenstaub enthaltenden behältern durch detektion von methan

Info

Publication number
EP0082867A1
EP0082867A1 EP82902156A EP82902156A EP0082867A1 EP 0082867 A1 EP0082867 A1 EP 0082867A1 EP 82902156 A EP82902156 A EP 82902156A EP 82902156 A EP82902156 A EP 82902156A EP 0082867 A1 EP0082867 A1 EP 0082867A1
Authority
EP
European Patent Office
Prior art keywords
dust
fires
detection
lignite dust
smoldering
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.)
Pending
Application number
EP82902156A
Other languages
German (de)
English (en)
French (fr)
Inventor
Erhard Wolfrum
Hans-Peter Päffgen
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.)
Rheinbraun AG
Original Assignee
Rheinische Braunkohlenwerke AG
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 Rheinische Braunkohlenwerke AG filed Critical Rheinische Braunkohlenwerke AG
Publication of EP0082867A1 publication Critical patent/EP0082867A1/de
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/117—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means by using a detection device for specific gases, e.g. combustion products, produced by the fire

Definitions

  • the invention relates to a method for the detection of smoldering fires in containers containing lignite dust, with the aid of which certain gases which form in the lignite dust and possibly escape therefrom are measured with a suitable detector and used as "indicator gases" for early smoldering fire detection can.
  • H 2 and CH * only appear when a smoldering fire has occurred in the bed.
  • This detection of a smoldering fire by detection of H 4 and CH 4 is, in addition to the previous early detection via CO, a further developed method for the detection of smoldering fires in lignite dust.
  • a limit concentration is given for H 2 and CH. not absolutely necessary, since these gases are specific for the presence of a smoldering fire.
  • the measurement of CH 4 is particularly suitable for the detection of smoldering fires.
  • a detector for detecting the gases in question is attached to the container containing lignite dust in such a way that it either probes into the emptying nozzle of the loading device. engages container or into the interior above the emptying nozzle, the probe being able to reach both in the region of the dumping height and in the gas space above the dumping height.
  • a plurality of such probes can also be provided spaced apart from one another and / or distributed in the circumferential direction over the length of the container.
  • the probes can either have detectors themselves or can be provided with connections which feed a mostly small amount of gas required for the measurement to a suitable device, for example a gas chromatograph or other gas analyzer.
  • a suitable device for example a gas chromatograph or other gas analyzer.
  • the method according to the invention was first tested in the laboratory.
  • smoldering fires were generated in a dust bed by heating the bed and introducing air.
  • the laboratory ässige method for target the composition of the gebil ⁇ by a smoldering brown coal dust Deten gases had to be compared with isti ⁇ gas which then forms ge # is when there is no smoldering is present.
  • the temperature in the bed was measured using thermocouples. After the above-mentioned temperatures had been reached in the bed, preheated air was introduced into the BK dust bed over a period of approximately 7.5 hours. The air flow rate was approximately 0.1 l / min.
  • the composition of the gas leaving the test apparatus was determined by gas chromatography with respect to H 2 , CH. , CO and CO- determined.
  • FIG. 1 The results of the tests are shown in a diagram in FIG. 1.
  • the representation is not to scale, in fact with regard to the relatively low values for hydrogen and methane.
  • the diagram shows the proportions of the individual gas components H 2 , CH., CO and C0 2 in volume percent (vol.%) Depending on the test temperature.
  • a lignite dust bunker 1 narrows in its lower part to form a funnel 2 which opens into an outlet element 3.
  • This outlet member 3 consists in particular of a cellular wheel 4 with drive 5 and a bellows 6 for adaptation to different customers.
  • the dust bunker 1 at the level of its funnel 2 has a ring line 7 for supplying compressed air, so that the bed inside the dust bunker can be loosened if necessary.
  • a CH 4 -IR gas analyzer engages with a probe 8 in the emptying neck of the container.
  • three identical probes 9 are attached over the axial length of the container at almost the same distance and possibly distributed in the circumferential direction, the probes projecting both into the area of the dust bed 10 and into the gas space 11 above the bed.
  • probes are also connected to a CH 4 ⁇ IR gas analyzer. Dust filters (not shown) are installed between the probe 8 or the probes 9 and the CH ⁇ -IR gas analyzers to protect the measuring devices.
  • Dust filters (not shown) are installed between the probe 8 or the probes 9 and the CH ⁇ -IR gas analyzers to protect the measuring devices.
  • In the course of the individual experiments of CH determined using the probe 9 was 4 ⁇ basic value in the bunker 5-33 measured through the probe 8 ppm CH 4 -Grundwert during the emptying of the hopper is about 10 ppm.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
  • Processing Of Solid Wastes (AREA)
EP82902156A 1981-07-08 1982-07-07 Verfahren zur früherkennung von schwelbränden in braunkohlenstaub enthaltenden behältern durch detektion von methan Pending EP0082867A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3126864 1981-07-08
DE3126864A DE3126864C2 (de) 1981-07-08 1981-07-08 Verfahren zur Früherkennung von Schwelbränden in Braunkohlenstaub enthaltenden Behältern

Publications (1)

Publication Number Publication Date
EP0082867A1 true EP0082867A1 (de) 1983-07-06

Family

ID=6136361

Family Applications (2)

Application Number Title Priority Date Filing Date
EP82902156A Pending EP0082867A1 (de) 1981-07-08 1982-07-07 Verfahren zur früherkennung von schwelbränden in braunkohlenstaub enthaltenden behältern durch detektion von methan
EP82106076A Expired EP0069393B1 (de) 1981-07-08 1982-07-07 Verfahren zur Früherkennung von Schwelbränden in Braunkohlenstaub enthaltenden Behältern durch Detektion von Methan

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP82106076A Expired EP0069393B1 (de) 1981-07-08 1982-07-07 Verfahren zur Früherkennung von Schwelbränden in Braunkohlenstaub enthaltenden Behältern durch Detektion von Methan

Country Status (8)

Country Link
EP (2) EP0082867A1 (cs)
AT (1) ATE16429T1 (cs)
AU (1) AU557814B2 (cs)
CA (1) CA1187718A (cs)
CS (1) CS245771B2 (cs)
DD (1) DD207438A1 (cs)
DE (2) DE3126864C2 (cs)
WO (1) WO1983000247A1 (cs)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9417289U1 (de) * 1994-10-27 1995-01-26 Meinke, Peter, Prof. Dr.-Ing., 82319 Starnberg Detektoreinrichtung, Detektorsystem und Immunosensor zum Erkennen von Bränden
DE19808663C2 (de) * 1998-03-02 2001-05-23 Epcos Ag System zur Branderkennung und Betriebsverfahren für dieses System
RU2175779C1 (ru) * 2000-11-28 2001-11-10 Николаев Юрий Николаевич Способ диагностики предпожарной ситуации и предотвращения возникновения пожара
CN105510175B (zh) * 2015-12-08 2018-04-06 辽宁工程技术大学 一种测定阻化剂阻化性能的方法
CN114813635B (zh) * 2022-06-28 2022-10-04 华谱智能科技(天津)有限公司 煤炉燃烧参数的优化方法及电子设备

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE539562C (de) * 1929-01-24 1931-12-10 Hermann Heinicke Einrichtung zur Bestimmung von Methan und anderen Kohlenwassersstoffen in Mischgasendurch katalytische Verbrennung
DE1160669B (de) * 1961-05-05 1964-01-02 Zd Y Prumyslove Automatisace N Fuehler fuer die Indikation der Waerme-Konvektionsstroemung, insbesondere bei katalytischen Gasanalysatoren
BE647714A (cs) * 1964-05-11 1964-08-31
DE2331984C2 (de) * 1973-06-16 1983-01-20 Bergwerksverband Gmbh, 4300 Essen Überwachungseinrichtung zum Abschalten von elektrischen Betriebsmitteln beim Überschreiten eines CH↓4↓-CO- Grenzwertes in Grubenräumen .
CH586940A5 (en) * 1974-10-03 1977-04-15 Anglo Amer Corp South Africa New method of fire detection in mines - obtains continuous measurement of carbon dioxide concentration gives alarm when given value is exceeded
GB1592506A (en) * 1976-12-15 1981-07-08 Consolidation Coal Co Electrical circuitry for detecting a combustible mixture of gas in a mine atmosphere
US4129030A (en) * 1977-10-13 1978-12-12 Ads Systems, Inc. Sensing apparatus and method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8300247A1 *

Also Published As

Publication number Publication date
CS245771B2 (en) 1986-10-16
DE3126864C2 (de) 1986-01-02
EP0069393A1 (de) 1983-01-12
AU557814B2 (en) 1987-01-08
CA1187718A (en) 1985-05-28
AU8688682A (en) 1983-02-02
DE3267275D1 (en) 1985-12-12
DE3126864A1 (de) 1983-01-27
DD207438A1 (de) 1984-02-29
WO1983000247A1 (en) 1983-01-20
EP0069393B1 (de) 1985-11-06
ATE16429T1 (de) 1985-11-15

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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

Designated state(s): AT BE CH DE FR LI LU

17P Request for examination filed

Effective date: 19830511

XX Miscellaneous (additional remarks)

Free format text: VERFAHREN ABGESCHLOSSEN INFOLGE VERBINDUNG MIT 82106076.1/0069393 /EUROPAEISCHE ANMELDENUMMER/VEROEFFENTLICHUNGSNUMMER) VOM 13.09.84.

RIN1 Information on inventor provided before grant (corrected)

Inventor name: WOLFRUM, ERHARD

Inventor name: PAEFFGEN, HANS-PETER