Major Energy & Chemical Company

Shaanxi Province, Northwest China

Removal of oil in synthetic water for coal-to-liquids system; make wastewater into recycle and improve product quality.

• Flow Rate: 200t/h
• Inlet: oil content is normally 0.99% and up to 2% in worse condition.
Oil Content % ≤2； Viscosity cp：0.68；Aldehyde wt% 0.54；Operating temperature 1~85；
Fluid density kg/m3 967；Ketone wt% 0.27；Operating pressure MPaG 0.11/0.70；
Oil density kg/m3： 710； Phenol wt% 1.99；SS wt.ppm 3~6 ；Water wt% 90.49；
Ester wt% 0；Operation flow：180；Ethanol wt%：5.72；
• Outlet: Oil recovery≥96%; oil content≤20ppm; SS removal≥93%
• Working Pressure: 0.3~0.5MPa

• Remove oil and suspended solids from synthetic water to less than 5 ppm
• Recover valuable oxy-compounds, recycle water and improve product quality.

Coal gasification, CTL direct or indirect liquefaction and catalyzed synthesis of petroleum are recognized as advanced technologies wildly being applied in the new energy industry, which produces wastewater that contains a lot of hydrocarbon compounds and oxy-compounds. In this project, Fischer–Tropsch process is applied, and in order to recover valuable oil, recycle water and improve production ability and quality, LAND ECO was appointed by owner to design and supply oil separation system.

According to the analysis data of wastewater, the solubility of oil in wastewater could be enhanced due to the existing of oxy-compounds, which causes the difficult separation of oil from water. Based on the coarse graining and wetting coalescent theory, and with the data collected from pilot test, LAND ECO designed, engineered and supplied the oil water separation system, with a set of three-stage GOS oil separator units, using patented technology and specific modified coalescing cartridges.

Sample    Original fluid  Pre-filter   Stage-A   Stage-B   Stage-C     Remark
water         95.389            95.388    95.387     95.389        95.387
SS                   0.7               0.7               0.69               0.67           0.68               ＜2ｕｍ
13.2               12.1        12.12           11.87        11.81             2-8
12.4                       0.05           0.00             0.00           0.00              8-20
73.7           0.00         0.00         0.00         0.00               20-50
oil                 1.5                   1.2                 0.3                 0.02               0.005

• The oil removal is up to 98%, which meets the customer’s requirement of less than 10 ppm.
• Enable produced water to be reused.
• Large handling capacity to manage different working condition
• Special construction materials of equipment to withstand the corrosive nature of seawater.
• Simple operation and low maintenance, with no additional dosage.
• LAND ECO’s oil-water separation systems have been proven to be capable of working in various conditions.