How does a hydrocyclone separate coke powder from the cold coke water in delayed coking?
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I read online that by using a hydrocyclone in the cold coke water system of delayed coking units, it is possible to reuse the wastewater from the unit, as well as to separate oil, water, and coke powder. I’ve seen coke powder in oil separation tanks; it’s very hard. How can it be separated from the centrifuge after that? The oils contained in cold coke water are quite heavy and sticky; can they be separated effectively? Has anyone used a hydrocyclone? Please share your experience. Thank you
The raw materials used in processing nowadays are quite heavy, and this type of equipment doesn’t perform very well; it’s recommended not to use it
The use of a hydrocyclone requires it to be used in combination with a scraper filter and a centrifuge; removing a large amount of coke powder first enables better separation of oil from water. At the same time, the hydrocyclone also requires regular coking removal
How much investment is needed for the supporting facilities?
I’m not quite sure about the current market situation; I’m sorry
This type of equipment is not reliable and has generally been phased out. If too much coke dust causes the hot water pump to run dry, it is possible to use hot water tanks in series; cleaning the coke dust from one of the hot water tanks on a regular basis will solve the problem!
This device is called a cyclone oil remover, also known as a tank-in-tank. Key technical features: ① A cyclone separator designed to treat oily wastewater by utilizing the density difference between oil and water, based on fluid dynamics principles in combination with cyclonic centrifugal separation; its treatment efficiency is dozens of times that of sedimentation separation. ②Liquid jet technology is integrated into the equipment, utilizing liquid mass transfer techniques to propel and accelerate the upward movement of small oil particles. When combined organically with cyclone separation technology, it is unaffected by changes in the oil content of the incoming water, ensuring stable water quality in the output water. ③It features uniform water distribution, an extended distance for wastewater flow, a shortened distance for oil particles to rise to the surface, an increased likelihood of oil droplet aggregation, and accelerated separation of oil and water, thereby ensuring stable separation results in subsequent steps. ④It is not affected by suspended solids in wastewater, resulting in a low pressure drop. ⑤An automatic oil level monitoring and drainage device, designed based on the difference in electrical conductivity and density between oil and water, is installed within the equipment, enabling automatic oil drainage. ⑥To ensure uniform liquid distribution and laminar flow within the equipment, as well as to prevent the formation of dead zones in the liquid flow, a complete system for promoting laminar liquid distribution is also installed in the equipment, so as to maintain a laminar flow state of the wastewater at all times.
How does everyone deal with the fine coke powder in coking wastewater? Are there any devices or processes in this area?
The cyclone oil remover is used only to treat oil-water mixtures; it requires regular backwashing. The oil phase from the treatment process goes into the return cold coking water sedimentation tank, while the water phase is sent to the cold coking water tank for use in coking water removal. A specialized filter is available before the transfer pump for handling coke powder, and the cold coking water sedimentation tank for the oil phase overflows on a regular basis.
The effect is not good; there is still a lot of burnt residue in the hot water tank. It is recommended not to use it