Graphite treatment methods for blocked vertical brick gas channels
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The vertical brick gas channels get clogged with graphite, and clearing them requires using wedges or hammers to break it free. Those who work on adjusting the temperature in coke ovens are familiar with this situation – dealing with several such blockages leaves one covered in sweat from exhaustion. As is known, when heating with coke oven gas, a small amount of graphite forms in the vertical brick gas channels as they rise (to be precise, at the gas outlet of the header bricks); this graphite can be burned off using the air introduced through the carbon removal holes as the channels descend. Sometimes, other factors prevent the introduced air from burning the graphite, causing it to accumulate thicker and thicker until the vertical brick gas channels become blocked. We utilize the carbon-removal pore principle: we connect one end of a rubber tube to compressed air and the other end to a short iron pipe, which is then inserted directly into the lower nozzle (preferably as soon as the flow direction changes from upward to downward). Turning on the air for a few minutes is sufficient to remove all carbon completely, and the operation can be carried out by two people. When there is a large-scale blockage, connect several more pipes. Perhaps some people are concerned about the tightness of vertical brick gas channels. Through several years of practical operation in our factory, we have not encountered any case of leakage between such vertical brick gas channels or leakage into the regenerator. Last edited by 26722672 on 2009-1-7 22:59]
The key is to avoid such situations from occurring. This has never happened here
Yes, it’s better to solve the problem at its root; I wonder if any senior can offer some advice.
The analysis is quite reasonable; I agree with it. However, this may vary depending on the management practices of different factories. Our factory has not encountered such a situation yet
It is necessary to check whether the decarburization ports are unobstructed; the formation of graphite in the brick gas channels is a normal phenomenon when using coke oven gas for heating. This issue can be resolved naturally by removing the cap at the bottom of the lower nozzle during the descent process and introducing air
To avoid and resolve this situation: 1. The purification of chemical process gas needs to be improved. 2. The heating of coal gas pipeline fittings must be thorough for proper cleaning. 3. The air carbon removal holes must be unobstructed. 4. Use a orifice plate in place of a nozzle, or increase the orifice diameter of the orifice plate.
Ask the original poster: what is the quickest and most effective way to clean a clogged horizontal pipe?
Poor gas purification can be deadly! It’s so hot in the middle of summer! I’m also worried about this issue; there are discussions on forums regarding it – some people experience problems with the fittings burning out, and others have issues with the concentric tubes burning out. I’m trying to keep the flow of liquid unobstructed ； The temperature of the second gas stream is slightly higher ； High-pressure steam is used for backflushing through the nozzle under the burner, forcing the tar to be expelled through the air carbon removal holes. One thing to note: during backflow, the lower nozzle cap must be removed; otherwise, water accumulation can occur, hindering the flow of gas. My furnace is of a smaller size; a pressure of 4 kilograms is required to ensure that steam emerges from each small branch pipe, thereby keeping them clear. Depending on your furnace type, the more small branches there are, the higher the pressure required.
Everyone has said good things; they are all doers. Our company has also encountered such situations, but not often, and they are easy to handle.