Discussion on the method of catalytic spot-assisted combustion chamber.
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Do you have any tips or tricks for setting up auxiliary combustion chambers in devices? ? Today, it took us the fourth attempt to light the permanent flame in the auxiliary combustion chamber. Therefore, I was wondering if there are any tips or strategies that could help, such as controlling the volume and pressure of the air used for purification, the opening degree of the louvers, or the ratio between primary and secondary air – anything like that that you might be able to share
What is the structural type of the auxiliary combustion chamber in the original poster’s design? Regular or low-dropout?
The last edit to this post was made by hean*n2007 on 2016-5-26 at 12:15. For low-pressure drop auxiliary combustion chambers, before starting the furnace, the dampers for primary and secondary air should be set so that only secondary air flows, with almost no primary air flowing. The louvers can be kept at an appropriate opening degree; since very little primary air flows, the opening degree of the louvers has little impact on the amount of primary air. The supply of fuel gas should also be adjusted to a moderate level, not too high. If your company uses a point ignition method, the following points need to be verified: 1. Our approach is to first pull out the ignition gun and test whether electric ignition is possible outside the furnace; usually, keeping the ignition switch pressed continues the discharge process. Adjust the flame length using gas, and it is recommended that the flame be straight and strong. Record the opening degree of the gas manual valve (ball valve). 2. Check that the angle of the flame viewing window (in the absence of a flame detector) is correct; if the angle is incorrect, it will be difficult to see the flame ； 3. Check the insertion depth of the igniter rod (which is essentially affected by the length of the igniter rod). If the igniter rod in some igniters is too far from the gas pipe outlet, the spark can only reach the gas and not the air, which directly affects ignition; in such cases, the fuel may not ignite at all. This has already occurred in some devices. 4. Before starting the furnace, it is necessary to light the earth torch (some systems do not use this; analysis data of the fuel gas is used instead. In my opinion, if the gas system is stable, the conditions are met), until the gas is free of water and the flame of the earth torch can burn independently after being separated from the main flame. 5. Adjust the air volume according to the ratio of wind to gas as I mentioned; generally, it’s no problem to ignite with a low pressure drop of around 5 KPa in the auxiliary combustion chamber. You can check the furnace pressure by feeling the outlet of the removed igniter. 6. Install the igniter, ignite it, and open the gas manual valve to the test position outside the furnace. The above are the general steps involved in lighting our furnace; we manage to get it lit on the first attempt, for your reference.
Thank you. Yesterday, a ground torch was used to remove air and moisture from the fuel gas. This morning, after removing the blind flange at the point where the fuel gas enters the auxiliary combustion chamber, another ground torch was used for replacement purposes at that location. Before lighting the permanent flame, the secondary air was set to full capacity, the louvers were opened to 15%, the pressure of the purification air was 3 kilograms, and the pressure in the auxiliary combustion chamber was 20 kPa. It took four attempts to get the flame to ignite
The pressure in the auxiliary combustion chamber is still a bit high. (Also, it’s advisable to water the ground before lighting the soil torches, to prevent the ground from cracking.)
When I was working in catalysis, each time with the auxiliary combustion chamber it felt like it was a matter of luck. Once switched to sulfur, the automatic ignition system works perfectly!
For you, an expert in catalysis, operating a sulfur furnace is a piece of cake
Now, the catalytic auxiliary combustion chamber is more automated, which is quite good.
You’re too kind, brother. After comparing the catalytic furnace with the sulfur furnace in detail, it’s clear that the sulfur furnace has a more rational design from the burner to the entire ignition process; it requires little human intervention, as it operates through programmed controls, completing everything smoothly and accurately step by step! When changing jobs, many things need to be understood anew; approaching issues from a different perspective can lead to many new discoveries!