GB1322708A - Flame monitoring - Google Patents

Flame monitoring

Info

Publication number
GB1322708A
GB1322708A GB4261869A GB1322708DA GB1322708A GB 1322708 A GB1322708 A GB 1322708A GB 4261869 A GB4261869 A GB 4261869A GB 1322708D A GB1322708D A GB 1322708DA GB 1322708 A GB1322708 A GB 1322708A
Authority
GB
United Kingdom
Prior art keywords
flame
photo
cells
radiation
chamber
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.)
Expired
Application number
GB4261869A
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.)
Danks Holding Ltd
Original Assignee
Bailey Meters and Controls Ltd
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 Bailey Meters and Controls Ltd filed Critical Bailey Meters and Controls Ltd
Publication of GB1322708A publication Critical patent/GB1322708A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/08—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements
    • F23N5/082—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2229/00—Flame sensors
    • F23N2229/16—Flame sensors using two or more of the same types of flame sensor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2239/00—Fuels
    • F23N2239/02—Solid fuels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/08—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements

Abstract

1322708 Pulverulent fuel burners; flame detectors BAILEY METERS & CONTROLS Ltd 27 Aug 1970 [27 Aug 1969] 42618/69 Heading F4T [Also in Division G1] In a flame monitoring system having two photo-cells 32A, 32B receiving radiation from adjacent parts 33A, 33B of the flame flicker region, the photo-cells are connected in series opposition (Fig. 3, not shown) and the difference between their outputs is applied through an RC coupling (37), an amplifier (38) and a rectifier (39) to provide a D.C. flame monitoring signal. The system is responsive only to smallscale, high frequency intensity fluctuations in the emitted radiation which do not occur in both parts 33A, 33B of the flame flicker region simultaneously. The overall emitted radiation and any large-scale low frequency variations affect both detectors equally and hence do not produce a differential output. The radiation is directed to the photo-cells, which may be photovoltaic cells or photo-resistors, along sighting tubes 31A, 31B. Alternatively, a single sighting tube containing two side-by-side photocells placed in the focal plane of a lens may be employed (Fig. 5, not shown). When photoresistors are used as the sensing elements, two may be placed as adjacent arms in a bridge arrangement whose out-of-balance current is applied to the R.C. circuit. A number of monitoring systems, each employing two photocells viewing different parts of the flame, may be employed, the D.C. outputs of the systems being summed to give information relating to the quality of the flame. The burner is of the pulverulent fuel type. A mixture of pulverized coal and carrying air is supplied along a passage 15 to a chamber 14, whence it whirls about the axis of the chamber 13 into a furnace. Further air is supplied through a central passage 16. Secondary combustion air from a plenum chamber 18 common to a plurality of burners flows through an annular aperture 19 having adjustable inclined vanes to impart a swirling motion. A retractable electric igniter 21 is provided.
GB4261869A 1969-08-27 1969-08-27 Flame monitoring Expired GB1322708A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4261869 1969-08-27

Publications (1)

Publication Number Publication Date
GB1322708A true GB1322708A (en) 1973-07-11

Family

ID=10425235

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4261869A Expired GB1322708A (en) 1969-08-27 1969-08-27 Flame monitoring

Country Status (1)

Country Link
GB (1) GB1322708A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5107128A (en) * 1989-05-05 1992-04-21 Saskatchewan Power Corporation Method and apparatus for detecting flame with adjustable optical coupling

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5107128A (en) * 1989-05-05 1992-04-21 Saskatchewan Power Corporation Method and apparatus for detecting flame with adjustable optical coupling

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee