FR2253197A1 - Fire alarm monitor for regenerative air preheater - uses paired electrical conductors separated by a semi-conductor - Google Patents

Fire alarm monitor for regenerative air preheater - uses paired electrical conductors separated by a semi-conductor

Info

Publication number
FR2253197A1
FR2253197A1 FR7439397A FR7439397A FR2253197A1 FR 2253197 A1 FR2253197 A1 FR 2253197A1 FR 7439397 A FR7439397 A FR 7439397A FR 7439397 A FR7439397 A FR 7439397A FR 2253197 A1 FR2253197 A1 FR 2253197A1
Authority
FR
France
Prior art keywords
fire alarm
air preheater
conductors
electrical conductors
conductor
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
FR7439397A
Other languages
French (fr)
Other versions
FR2253197B3 (en
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.)
Apparatebau Rothemuehle Brandt and Kritzler GmbH
Original Assignee
Apparatebau Rothemuehle Brandt and Kritzler 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 Apparatebau Rothemuehle Brandt and Kritzler GmbH filed Critical Apparatebau Rothemuehle Brandt and Kritzler GmbH
Publication of FR2253197A1 publication Critical patent/FR2253197A1/en
Application granted granted Critical
Publication of FR2253197B3 publication Critical patent/FR2253197B3/fr
Granted legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
    • F28F27/006—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus specially adapted for regenerative heat-exchange apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D19/00—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium
    • F28D19/04—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using rigid bodies, e.g. mounted on a movable carrier
    • F28D19/041—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using rigid bodies, e.g. mounted on a movable carrier with axial flow through the intermediate heat-transfer medium

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Resistance Heating (AREA)

Abstract

The cylindrical air preheater encloses a cellular core with series of ducts on the outer side. Pairs of electrical conductors in parallel are fitted around circular paths between adjacent hot and cold heat end faces. The conductors are separated along their length by a semiconductor material with predetermined characteristics. These are designed to provide a high electrical resistance at normal working temps. with a sudden drop in resistivity at a danger threshold temp. The conductors then pass a pulse of electricity which triggers the fire alarm. The design is economical and monitors all areas of the chamber where combustible waste particles can be deposited during operation.
FR7439397A 1973-12-03 1974-12-02 Fire alarm monitor for regenerative air preheater - uses paired electrical conductors separated by a semi-conductor Granted FR2253197A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2360134A DE2360134B1 (en) 1973-12-03 1973-12-03 Fire alarm device for a regenerative air preheater

Publications (2)

Publication Number Publication Date
FR2253197A1 true FR2253197A1 (en) 1975-06-27
FR2253197B3 FR2253197B3 (en) 1977-08-26

Family

ID=5899712

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7439397A Granted FR2253197A1 (en) 1973-12-03 1974-12-02 Fire alarm monitor for regenerative air preheater - uses paired electrical conductors separated by a semi-conductor

Country Status (6)

Country Link
AU (1) AU7594774A (en)
DE (1) DE2360134B1 (en)
ES (1) ES208287Y (en)
FR (1) FR2253197A1 (en)
IT (1) IT1023469B (en)
ZA (1) ZA747637B (en)

Also Published As

Publication number Publication date
AU7594774A (en) 1976-07-01
ES208287Y (en) 1976-07-16
DE2360134B1 (en) 1975-03-20
ES208287U (en) 1976-04-01
FR2253197B3 (en) 1977-08-26
IT1023469B (en) 1978-05-10
ZA747637B (en) 1975-12-31

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Legal Events

Date Code Title Description
ST Notification of lapse