How to check the ammonia spraying condition in the bridge pipe
Thread Content
In our facility, there are occasional instances where the ammonia spray in certain bridge pipes does not function properly. By the time it is detected, leakage has already occurred at the flanges of the rising pipes. How can such issues be detected in advance so that they can be addressed promptly? :loveliness:
When ammonia spraying in the bridge tube is not smooth, the temperature of the bridge tube will definitely rise. So I think the simplest way is to first determine whether the temperature of the bridge tube is too high.
This is how we usually proceed: 1. Check the ammonia spray situation in the rising pipe during coke pushing. 2. Touch the ammonia spray tube in the rising pipe to see if its temperature is lower than that of the others; if the ammonia tube is blocked, its temperature will be lower. 3. Check whether the temperature of the gas in the collection pipe has increased.
If ammonia spraying is inadequate in individual bridge pipes, it can lead to unstable temperatures in the gas collection pipes; high surface temperatures on the bridge pipes can also indicate poor spraying (except when the bridge pipes are not cleaned properly). Melting of asphalt at the joints, as well as sparks during coal handling, are other indicators that should be taken into consideration for a comprehensive assessment.
1. Establish a reasonable cleaning system for the rising pipe: managers must ensure proper inspection, and operators must carry out thorough cleaning. 2. When cooling the furnace, it is necessary to open the cleaning hole cover to check the misting condition of the ammonia solution, ensuring that each furnace is cleaned thoroughly. 3. Observe whether there is melting or smoking of the socket and spigot asphalt. 4. Pay special attention to checking whether the water in the water seal of the rising pipe is boiling. 5. Check whether there is any whitening on the outside of the bridge tube.
It’s actually very simple: there are two methods. (1) Observe the changes: 1. If the temperature of the gas collection pipe is abnormally high, it may indicate that ammonia spray has caused blockages in the area around that detection point, resulting in poor cooling of the waste gas； 2. Check whether the asphalt tar in the bridge pipe socket has melted, or if there is smoking, etc ； 3. Check whether the bridge pipes (on both sides of the ammonia spray nozzles) are turning white or even yellow, and whether there is smoking from the tar in the vicinity ； 4. Check whether there is an increase in tar inside the water seal of the rising pipe; if so, it indicates that the spraying is not effective ； 5. If the spraying is not done properly, it can lead to an increase in tar and graphite inside the bridge tube; over time this can result in poor smoke circulation, and smoking may occur during coal loading ； (2) Check the pipeline: 1. Feel the ammonia spray pipe (near the nozzle) to see if it is cooler or at the same temperature as the ambient air; if so, it indicates a blockage ； 2. Close the shut-off valve on the ammonia pipeline below to check whether the pipeline is vibrating; if it is not vibrating, it indicates a blockage ；
It’s a simple issue: the person responsible for maintaining the rising pipe can easily detect it during cleaning. Once it’s detected, it can be repaired right away; if smoking or burning starts, then it’s too late
The simplest way is to feel the temperature difference with your hand to tell
I happened to pass by and learned from you; I’ll keep learning from all of you experts in the future!