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flame monitor

A flame sensor, flame technology, applied in the direction of burner, control combustion, gas fuel burner, etc.

Active Publication Date: 2022-04-19
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Flame lift may require safety lockout of burner

Method used

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Examples

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Embodiment Construction

[0024] figure 1 The flame 1a inside the combustion chamber 2 is shown. A feed conduit 3 leads a combustible fluid, such as fuel oil or gas, to the combustion chamber 2 . It is conceivable to convey combustible gases such as methane, ethane, propane or hydrogen or mixtures thereof via the feed conduit 3 . In one embodiment, the combustible fluid is a mixture of combustible gas and air.

[0025] The combustion chamber 2 and duct 3 are usually part of a combustion plant. As a non-limiting example, the combustion device may include a gas burner.

[0026] The arrangement comprises an ionization electrode 4 with a tip 5 . The ionization electrode 4 is arranged such that its tip 5 reaches inside the flame 1a. Such as figure 1 As shown, the ionization electrode 4 may be mounted to a frame 6, such as a support disc. The frame 6 is aligned with the ionization electrode 4 such that its tip 5 will interact with the flame 1a.

[0027] The tip 5 of the ionization electrode 4 advan...

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Abstract

This invention relates to flame monitors. The control system includes an output unit (18), an ionization electrode (4), a first flame sensor (12), a processor (14), and the processor (14) is configured to: receive from the ionization electrode (4) a first an ionization signal; receiving a second ionization signal indicative of ionization current from the ionization electrode (4) after receiving the first ionization signal; receiving a second ionization signal indicative of radiation from the flame (1a to 1c) from the first flame sensor (12) a flame signal; receiving a second flame signal indicative of radiation from the flame (1a to 1c) from the first flame sensor (12) after receiving the first flame signal; generating a derived ionization signal; generating a derived flame signal; A safety signal is generated based on the derived ionization signal and based on the derived flame signal; the safety signal is transmitted to an output unit (18).

Description

technical field [0001] The present disclosure relates to monitoring a flame in a combustion device. More particularly, the present disclosure teaches the combined use of electrical and optical principles to detect flame lift-off inside a combustor. Background technique [0002] Combustion devices such as gas or oil burners often employ exhaust gas recirculation in an attempt to reduce nitrogen oxide emissions. However, exhaust gas recirculation may cause the flame to float. Flame lift-off is an undesirable condition. Flame lift may require a safety lockout of the burner. Therefore, it is desirable to monitor flame lift-off inside the burner. [0003] European patent application EP3339736A1 was filed on November 17, 2017 and published on June 27, 2018. EP3339736A1 relates to flame detection for combustion devices. The arrangement according to EP3339736A1 utilizes a photodiode 1 connected to a differential amplifier 2 to detect flames. The photodiode 1 receives a light ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23M11/04F23N5/08
CPCF23M11/04F23N5/085F23D14/46F23N1/002F23N5/082F23N5/123F23N5/242F23N2229/14F23N2229/16F23N2231/06F23D14/74F23N5/08F23N5/12F23N2227/16F23N2229/06
Inventor K.奥布雷赫特
Owner SIEMENS AG
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