How to remove floating oil from circulating ammonia water
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Our circulating ammonia water contains a lot of floating oil, which often causes blockages in the coke oven nozzles. Do any experts have any good solutions?
Theoretically, it mainly involves filtering the ammonia water system; ceramic filters or other filtration devices can be used.
First, check for any issues with the operation; for example, continuous oil extraction can be used, and the number of times oil is drained from the circulating ammonia tank can be increased. Additionally, insights can also be gained from coal blending.
This post was last edited by hao101029 on 2012-4-3 21:53. Ceramic mesh filters are used, and tar is regularly added to the bottom of the ammonia tank. Recently, a method has been developed that involves adding chemicals to the ammonia to reduce its oil content; however, foam tends to form when loading tar. Originally, 50 tons were planned to be loaded, but only 30 tons were actually loaded
1. For the filtration of the ammonia water system, use an upper filter. 2. Add chemicals to improve the separation efficiency. 3. Check for emulsification, and control the amount of other water that enters the circulating ammonia solution to prevent emulsification. 4. Add a standing tank to the circulating ammonia tank. Normally, with circulating ammonia water, the water at the bottom is drawn up; floating oil cannot be removed, which suggests that the separation is not adequate.
The existing mature production processes should be sufficient to meet the requirements for ammonia solution clarification; in my opinion, there is no need to introduce new equipment, as it is time-consuming, troublesome, and costly. Actually, the most important thing is whether the clarification time of the ammonia solution has been reached. It’s possible to check whether there are any control gaps in the manufacturing process.
This phenomenon occurred at the beginning of this factory’s operation; initially, it was thought to be due to only one unit of the mechanical ammonia clarification tank being in use, but after analysis, it was found that the main negative pressure pipeline of the coke oven was blocked.
Control the quality and quantity of incoming wastewater to ensure low levels of light tar and prevent tar from emulsifying.
First, check for any issues with the operation, and inspect the filtration in the ammonia water system
Check whether the mechanical clarifier is pressurized with oil as required; if oil is not pressed in on time, the tar will be carried to the ammonia tank and then drawn to the coke oven.
By adding a tar-ammonia separation agent, the efficiency of separating tar from ammonia water is improved, which effectively reduces the amount of floating oil, tar content in the recycled ammonia water, and suspended solids, thereby significantly alleviating nozzle clogging