Hearth flameout detection device and detection method thereof

Abstract

The invention discloses a hearth flameout detection device and a detection method thereof. The hearth flameout detection device comprises a sampler, a sensor, a full-hearth flameout protection deviceand a boiler protection system, wherein the sampler samples pressure in a hearth flue; the sensor is connected with the sampler; the full-hearth flameout protection device comprises a flameout analyzer and a power source for providing electric energy for the flameout analyzer; the sensor is connected with the flameout analyzer through a signal cable; and the flameout analyzer is connected with theboiler protection system. The method comprises the steps that the smoke pressure in a hearth is collected and measured through the sampler, converted into a pressure signal through the sensor and transmitted to the flameout analyzer, and the flameout analyzer outputs a signal which is output by the flameout analyzer and represents the combustion condition to the boiler protection system. The hearth flameout detection device makes up defects of an existing flameout protection device, has high reliability, improves the anti-explosion capacity of a boiler and avoids serious accidents, thereby greatly improving the safety of the boiler.

Description

Technical field: [0001] The invention relates to a furnace flameout detection device and a detection method thereof, and relates to the technical field of furnace flameout detection. Background technique: [0002] For a furnace with balanced ventilation, the detection of a single burner's ignition, flameout, and flameout of all burners is currently detected by the light or heat emitted by fuel combustion. The detection of light is achieved. The monitoring means to prevent fuel explosion in the boiler, in addition to direct flame optical measurement, also has indirect furnace pressure monitoring, which can also play a certain protective role when the pressure representing the combustion condition is abnormally increased or decreased, while the conventional furnace Pressure protection, the analysis time domain of its signal is about 1 second. Although it has a small part of flameout protection function, it is mainly the protection of the furnace structure strength. Shutdown ...

AI Technical Summary

Problems solved by technology

The monitoring means to prevent fuel explosion in the boiler, in addition to direct flame optical measurement, also has indirect furnace pressure monitoring, which can also play a certain protective role when the pressure representing the combustion condition is abnormally increased or decreased, while the conventional furnace Pressure protection, the analysis time domain of its signal is about 1 second. Although it has a small part of flameout protection function, it is mainly the protection of the furnace structure strength. Shutdown MFT (Main Fuel Trip) condition, which is not fully flameout protected

[0003] At present, from the power industry regulations to the National Energy Safety Administration, there are requirements to prevent boiler deflagration. Once the entire furnace is turned off, all fuel supply must be cut off as soon as possible, and the unit must be shut down. Such important protection depends on the large number (mostly in 36 The burner fire detection between -48 units) has high requirements on the operating environment and personnel quality. In reality, as long as there is an optical flame detector that still sends out a fire signal, it will cause refusal to operate, so the flameout protection of the whole furnace is relatively large. In some special working conditions, such as when the amount of fuel is relatively small, all flames will be extinguished, and it is difficult to drive the protection action only from the furnace pressure monitoring. At this time, a flame detector is faulty, or the flame detection is artificially Fires often occur, so the flameout protection of large and small boilers has always existed for a long time, and the possibility of deflagration will increase sharply, which will seriously threaten the safety of people and equipment, and bring serious consequences to safe production.

Images