Analog Electronics Design Project -
A particular blast furnace uses natural gas powered burners for heating. A problem exists in that, if the flame was to extinguish, the gas will continue to fill the chamber and be a major explosive hazard. Consequently an electronic flame-out detector is required, that will sound a warning soon after flame-out.
The problem is made more complex, in that the detector should take into account for momentary flutters in the flame. This could be due to either gas pressure changes or from the flame being blown away from the detector.
A flame has a number of properties that can be used for detecting the presence of flame. The first is the heat from the flame. However, the furnace could already be at a certain temperature such that the cooling from flame-out will not be detected soon enough.
Another property of the flame, is that it has the capability of supporting a current. That is, the flame has a low resistance and thus can be utilised as a closed switch, which opens on flame out.
Any form of help will be greatly appreciated.Thnx
A particular blast furnace uses natural gas powered burners for heating. A problem exists in that, if the flame was to extinguish, the gas will continue to fill the chamber and be a major explosive hazard. Consequently an electronic flame-out detector is required, that will sound a warning soon after flame-out.
The problem is made more complex, in that the detector should take into account for momentary flutters in the flame. This could be due to either gas pressure changes or from the flame being blown away from the detector.
A flame has a number of properties that can be used for detecting the presence of flame. The first is the heat from the flame. However, the furnace could already be at a certain temperature such that the cooling from flame-out will not be detected soon enough.
Another property of the flame, is that it has the capability of supporting a current. That is, the flame has a low resistance and thus can be utilised as a closed switch, which opens on flame out.
Any form of help will be greatly appreciated.Thnx