The resistance of the primary cooler and the resistance of the final cooler are both increasing; seeking help
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Some time ago, the coke oven gas collection pipe became blocked, and the coke ovens had to be purged continuously on a daily basis, which resulted in abnormal tar residues being produced. In recent days, the gas collection system doesn’t seem to be very clogged in terms of pressure and valve opening, but the coke oven purging process has not stopped. What’s important is that today the resistance in the primary coolers and secondary coolers suddenly increased. Normally two primary coolers are used, but today three were used, and their resistance levels were high; the resistance in the secondary coolers also increased, though not as much as that in the primary coolers. Additionally, the online flushing of the primary cooler has never stopped; the volume of the mixture remains within normal ranges, and its proportion is also under control, with measurements taken and adjustments made on a daily basis. The amount of gas used has been low these past two days – it shouldn’t be this low compared to earlier periods. I’m not sure what’s going on with the furnace. I hope experts can offer some guidance; I’d be extremely grateful. .
It’s the naphthalene that’s causing the blockage; the spray pipes of the primary cooler must be blocked
The increase in dust and tar mist in the gas leads to an increase in the resistance of the primary cooler and the final cooler. Let’s take a look at the toluene-insoluble substances in the tar as well.
You can contact Manager Ma at Jianeng Chemicals; their products can help reduce the resistance of pre-coolers by 139-3066-6393. Our factory has been working with them for several years, and the results have been very good
A simple modification can be made to the primary cooler, preventing it from getting clogged for a whole year
Perform regular cleaning of the primary cooler with hot ammonia solution to see the effect
Washing with cleaning oil or crude benzene yields the best results; a pump should be installed underground to pump fluid upward, as coal dust blocks the initial cooling stage. Nai blocked the final cooling.
I think it’s possible that some impurities present in the gas have clogged the heat transfer tubes (it could be naphthalene or coal dust); what about the temperatures before and after? ), you can try using cleaning oil spray to address the issue; regular spraying is necessary. Additionally, it’s important to find out the root cause of the blockage in the gas collection system – whether it’s related to changes in the type of coal used, whether this problem has only appeared recently or has been present all along. Also, pay attention to the issue of tar dehydration; I’ve encountered similar situations before, and currently it’s quite difficult to deal with tar dehydration; I’m also puzzled by this.
The liquid outlet pipe in front of the primary cooler is blocked; it has been blocked for about half a month, probably due to tar. The coal gas pipes in front of the primary cooler are filled with thick tar
The liquid outlet pipe in front of the primary cooler is blocked; it has been blocked for about half a month, probably due to tar. The coal gas pipes in front of the primary cooler are filled with thick tar