Emulsified Acidic Water Treatment in Coking Plant

Product Detail

Process flow



Process Introduction

Petroleum and its products contain sulfur and nitrogen compounds. During various processing stages like atmospheric/vacuum distillation, catalytic cracking, delayed coking, and catalytic hydrogenation, these compounds are formed as a result of high-temperature cracking, catalytic cracking, and hydrogenation reactions, leading to the production of H2S and NH3-N, which enter the product stream. These product streams undergo condensation dehydration or water washing treatment, resulting in wastewater containing sulfur and ammonia compounds, commonly referred to as sulfur-containing wastewater or acidic water.




The main features:

High content of coke powder with a small particle size distribution. High oil content, small droplet size, and severe emulsification. High levels of sulfur, ammonia nitrogen, and phenols. Complex composition with significant fluctuations in content.




Utilizing CDFU (Cyclonic Dissolved Gas Flotation) + fine filtration + KHC (High-Efficiency Coalescing Separator) as core technologies, this equipment achieves an emulsified oil removal precision of up to 0.1µm and an outlet oil content below 10ppm. This technology demonstrates feasibility, reliability, and significant environmental and economic benefits compared to traditional methods, positioning it at the forefront domestically.

NO.	Parameter	Traditional Dissolved Air Floatation	CDFU
1	Principle	Dissolved air+Air floatation	Cyclonic+Dissolved gas +Flotation
2	Residence time	15~40 min	<5 min（only1/8~1/3）
3	Oil removal efficiency (single stage)	60%~85%	>90%
4	Suspended solids removal rate (single-stage)	50%~70%	>80%
5	Removal of particle size (>80%)	＞5μm	<3μm
6	Operation cost	Higher	Lower
7	Automate	Manual	Fully automatic
8	Bubble diameter	5μm ~ 100μm（normal uniformity）	5μm ~ 30μm（good uniformity）
9	Structure type	RC	Pressure Vessel Skid Mounting Equipment




Application Case