Coal tar emulsification problem
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Our company’s coal tar has suddenly become emulsified; the oil-to-water ratio in the samples taken from the circulating ammonia water is 40%. After investigation, external contamination by wastewater has been ruled out. What other possible causes could there be?
What is the tar-ammonia separation process?
You can try adding a demulsifier to the circulating ammonia water; it’s best to resolve this issue as soon as possible, as it could cause problems in subsequent biochemical processes and in the tar dehydration process in the tank area. 15615812088.
1. High temperature in the furnace roof space leads to emulsification. 2. Circulating ammonia water contains excessive oil, leading to emulsification.
The tar separation process should be fine, right? Take a water sample using a beaker, let it settle, and check the state of the tar after separation. If it sinks, there is likely an issue with the procedure. With the oil-to-water ratio of 2:3 as you mentioned, the possibility of tar emulsification is low
Going to the site to conduct on-site checks of the temperature in the coke oven roof space is most likely due to issues with coking
Tar-ammonia emulsification is generally a problem related to the temperature control in the furnace top area; meanwhile, if a negative pressure control system is newly installed in the coke oven (or if the pressure fluctuations in the intake pipes are too large), coal dust can easily be drawn in, forming nucleation sites within the tar-ammonia mixture and thereby promoting emulsification. Another point is to consider the sampling issue. The solution is to add some demulsifiers to maintain stability, and during this time check for any issues with the process operations