Emulsified Acidic Water Treatment in Coking Plant
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
