Technical renovation of ignition system for fuel-fired heat conduction furnaces

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This post was last edited by zry0011 on 2016-1-31 at 11:25. Technological upgrades to the ignition system of a fuel-fired heat transfer oil furnace: One of the company’s 3 million kcal heat transfer oil furnaces developed a malfunction recently; repairs took 3 days and 3 nights. Due to the complexity of the issue, I won’t go into details here. In short, almost the entire oil circuit was checked, but that’s beside the point. During maintenance, it was found that the ignition rod had issues with proper ignition, and occasionally failed to ignite. The ignition method uses a high-voltage ignition transformer of 2*6.5 kV, with a dual ignition rod system. If the ignition rod fails to ignite, it can lead to combustion problems; ignition-related faults account for around 30% of oil furnace failures. To this end, I thought of modifying the original ignition system using a Tesla coil. Figure 1: This is a pile of ignition transformers that have been replaced over the past 8 years; there are still 3 functional ones in the cabinet. (The ignition transformer is expensive, with a price of 500 to 1000 yuan per unit.) Fragile. (The ignition also doesn’t work properly.) file:///C:/Users/ADMINI~1/AppData/Local/Temp/msohtmlclip1/01/clip_image002.jpg Figure 2: These are the components of the Tesla ignition coil; testing should be carried out using 12V DC first. (It is a universal board that works with 12-36V voltages.) File:///C:/Users/ADMINI~1/AppData/Local/Temp/msohtmlclip1/01/clip_image004.jpg Figure 3: This shows the sparking phenomenon that occurs during testing after the wires are connected; the flame is strong enough. A 12V 10A power supply is used (it is stated that the current supplied by the power supply must be sufficient; I used a power supply from an outdoor LED lighting unit with 10A capacity; if possible, a 24V 10A power supply can be used, as this will result in a stronger spark). After ignition, the distance between the components can reach about 5 cm. (I was worried that the flame would be blown out by the burner’s blower until it was installed in the furnace.) file:///C:/Users/ADMINI~1/AppData/Local/Temp/msohtmlclip1/01/clip_image006.jpg Figure 4: Connecting the accessories such as the high-voltage ignition wire in the electrician’s workshop. file:///C:/Users/ADMINI~1/AppData/Local/Temp/msohtmlclip1/01/clip_image008.jpgFigure 5: Photo taken before the burner is installed. (After installation, the spacing between the ignition rods should be around 4 MM; if it’s too large, there may be a problem with ignition.) A perigee of 2MM also has no impact. ) Photos of it being placed inside the furnace and of it being ignited were not taken as they were difficult to capture. file:///C:/Users/ADMINI~1/AppData/Local/Temp/msohtmlclip1/01/clip_image010.jpg Conclusion: By replacing the original ignition transformer with a Tesla ignition coil, the flame becomes more powerful; when there is a higher airflow, the spark is blown apart even more intensely. It will not affect the fuel from failing to ignite. Also, Tesla coils can produce sparks for a long time without getting damaged. The cost is low; the kit plus power supply costs around 120 yuan. It’s much cheaper than an ignition transformer. The key is the ignition quality, which is excellent; anyone who uses it will know that. So I’d like to share this good method with everyone.