Good news:Urumqi Petrochemical CDFU Black Water Treatment Project Started Smoothly
At 11:00 on January 13, the new 400,000 tons/year coking pretreatment unit CDFU black water treatment project of PetroChina Urumqi Petrochemical Company, which was built by SINOKLE, switched the water and transferred it to the normal process according to the overall plan, and the water analysis passed , which marks the first successful commissioning of the CDFU project.
CDFU, the full name in English is Cyclonic Dissolved Gas Flotation Unit. It is a new generation of green and efficient compact vertical tank air flotation equipment developed by SINOKLE. This equipment integrates patented technologies such as cyclone centrifugal separation technology, ultra-fine bubble generation technology, and dissolved air flotation technology. Through the organic combination of multiple technologies, it can achieve efficient and rapid separation of dirty oil, emulsified oil, suspended solids, etc. in sewage.
serial number | Parameter | Traditional Dissolved Air Floatation | CDFU |
1 | Water quality | Oily (with suspended solids) sewage | Oily (with suspended solids) sewage |
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 | Bubble generation method | Dissolved air pump/other dissolved airs methods | Dissolved gas pump |
7 | Bubble diameter | 5μm ~ 100μm（normal uniformity） | 5μm ~ 30μm（good uniformity） |
8 | Gas injection method | Partial water reflux | Partial water reflux |
9 | Pressure consumption | 0.05Mpa~0.1Mpa （Partial return of water） | 0.05Mpa~0.1Mpa（Partial return of water） |
10 | Operation mode | manual, open type | Automatic, closed operation |
11 | Slop oil discharge | Rely on slag scraper, mechanical slag discharge | Pressure-driven oil and residue discharge, without mechanical power |
12 | Technical features | Long residence time, large floor area , low flotation, chemicals added, and the effect of oil removal and suspended solids is unstable. | Compact structure, small floor area(traditional 1/3), high removal rate of emulsified oil and fine suspended solids, without chemical agents. |
13 | Application range | Land and other occasions with low requirements for land occupation and weight | Especially suitable for difficult-to-treat sewage containing emulsified oil and fine suspended particles in oil fields or offshore platforms |
14 | Structure type | RC | Pressure Vessel Skid Mounting Equipment |
The commissioning work was carried out by the first refinery workshop of UPC. In the early stage, the workshop divided the responsibilities of the teams, and the leaders took the lead in confirming step by step. After three checks and four determinations, sufficient preliminary preparations were made, and good test conditions were met.
On January 9, test runs began. On January 10, all internal processes were cleared, and all instruments inside the skid were debugged normally. On January 11, the entire skid installation was completed. On January 13, the test run was successful.
After the device is put into use, it is expected to receive 50-60 tons/hour of second-normal, third-normal, and pre-treatment electric desalination water. This set of facilities can achieve oil-water separation of highly oily sewage, reduce the generation of sludge, and reduce operating costs. It has good environmental benefits and economic benefits.
CDFU cyclone dissolved air flotation equipment has outstanding advantages such as compact structure, small footprint, low operating cost, high removal rate of emulsified oil and fine suspended solids, and does not require the use of chemicals. It is especially suitable for oil fields, refineries or offshore The platform's ability to treat highly difficult sewage containing emulsified oil and fine suspended particles has been successfully used in more than 30 difficult sewage treatment projects at home and abroad and achieved stable operation.
