The difficulty with oilfield spilled oil sludge is the high dispersion of the oil and the wide particle-size span of the solids. Ruituxiang uses an "environmental chemicals + centrifuge (hot-wash)" process: the chemicals complete demulsification and separation, hot-wash + centrifuge brings dewatering to compliance, oil content of the solids <2%, the separated oil is recovered, and the wastewater is discharged to standard.
The oil phase is dispersed in the sludge in adsorbed and emulsified states. Without breaking the "oil–water–solid" interface, settling or filtration alone cannot remove the oil cleanly.
The applicable particle-size range is 2–100 mesh, from coarse sand to fine powder. A single mechanical method cannot cover both; chemical conditioning is needed first to change the particle surface properties.
From feed analysis to compliance verification, the process package is delivered together with the chemicals.
| Dimension | Ruituxiang solution | Conventional method |
|---|---|---|
| Separation principle | Chemical demulsification + physical centrifugation | Settling / filtration only |
| Oil content of the solids | <2% | Typically 3–8% |
| Oil recovery | Recoverable; the separated oil can be reused | Lost |
| Secondary pollution | Water-based system, low toxicity | Depends on the process |
| Site requirements | Can be built on the client's own site | Dedicated site required |
The following are real projects and delivery records.
Chemicals + centrifuge (hot-wash) process, built on the client's own site, with agreed annual throughput at the ten-thousand-tonne scale.
Oil-sludge treatment scheme presentation based on environmental chemicals plus chemical supply; the scheme went through multiple version iterations.
Volume-reduction treatment of oily cuttings, with complete construction scheme, safety system, testing records and personnel qualifications.
Main separation agent: demulsification and stripping, oil content of the solids <2%.
PL15Front-end viscosity reduction and dilution, suited to winter low temperatures and high-wax conditions.
PAMFlocculation and settling plus water-phase clarification, standard in the process chain.
PACCoagulation and clarification safeguard at the end of the process chain.
Volume reduction of high-oil offshore cuttings, complete qualification package.
PAM + PAC coagulation and flocculation for oily wastewater treatment.
Chemical pre-treatment for volume reduction, lowering downstream load.
Provide the sludge type, oil content and treatment volume, and we will give a selection assessment and target indices based on 19 years of field experience.