Coarse-grained coalescence technology (WYS type oil-water separator): Effectively solves the challenging problem of treating residual liquids from new materials.

I. Overview of Treatment of Extraction Residue Liquids from New Materials

The development of the new energy industry has significantly increased the demand for new materials such as lithium, titanium dioxide, and zirconium. However, the extraction of materials like titanium dioxide and zirconium often involves acid leaching from ores, followed by extraction using organic solvents; lithium extraction mainly comes from salt lake brine, where organic solvents are used to transfer lithium into the organic solvent, and then lithium is extracted from the lithium-containing mother liquor through back-extraction. The extraction of these materials all involves the use of organic solvents, and the separation process consequently produces oily extraction residue liquids, which require oil removal treatment according to environmental protection requirements.

Wastewater is usually highly acidic, often containing 20-25% hydrochloric acid or phosphoric acid, and also contains high concentrations of oil and grease; although their suspended solids (SS) content is low, they are rich in metal ions, acids, and oily components.

Depending on the different extraction processes, some companies need to achieve oily water separation of the extraction residue liquid to recover and reuse the organic solvent, while others need to treat the separated acid solution for reuse. Therefore, to meet the process reuse requirements, the selection of the oil removal process must consider both efficient separation capabilities and the requirement of not introducing new impurities.

2. Principles of Pure Physical Coalescence Technology (WYS Horizontal Oil-Water Separator)

Pure physical coalescence technology uses physical means to promote the coalescence of tiny particles or oil droplets into larger particles, thereby achieving efficient separation. Its core principles mainly include collision coalescence, wetting coalescence, and sedimentation separation.

• Collision Coalescence

Oil droplets collide with each other when passing through coalescing materials, merging smaller droplets into larger ones, increasing floating speed.

• Wetting Coalescence

The material surface possesses oleophilic and hydrophobic properties, making it easier for oil droplets to adhere and fuse, forming larger oil droplets that then rapidly rise and separate.

• Sedimentation Separation

Based on Stokes' Law, the sedimentation velocity of particles is directly proportional to the square of their diameter. The larger particles formed through coalescence have a significantly increased sedimentation velocity and can be efficiently separated by gravity or inertial force.

3. Features of the WYS oil-water separator:

(1) Utilizing the density difference between oil and water, applying fluid dynamics principles, combining with the separation technology of hydro-cyclone centrifugal to treat oily wastewater, and achieving high treatment efficiency;

(2) The coalescer of W-shaped corrugated plate increases the probability of coalescence of oil droplets enhances the coalescence effect of coarse particles, shortens the time of oil-water separation, and ensures the oil-water treatment effect;

(3) Not affected by suspended solids in wastewater, with high flux;

(4) The stainless steel coarse filter and the polymer coalescence filter are designed to remove oil droplets with different particle sizes, achieving a high oil removal rate ;

(5) The equipment is fully enclosed, eliminating the need for providing volatile organic compounds (VOCs) treatment device . No chemicals are added, no hazardous waste such as oily sludge (HW08) is generated, and operating costs are low;

(6) We can provide 7*24-hour cloud intelligent services, The big data platform remotely analyzes and optimizes the operation status of equipment in real time, sharing global data. lt collects statistics on both horizontal data (data between different devices) and vertical data (historical data of a single device).providing strong support for equipment operation and maintenance, after-sales service, equipment upgrades, fault alarms,troubleshooting, and other aspects.

4. Engineering Case Studies

A titanium dioxide extraction residue degreasing project at a company in Fujian Province utilized a WYS oil-water separator. Using only one horizontal oil-water separator simplified the treatment process and achieved efficient oil removal from the extraction residue, meeting the company's requirements.

With the influent oil content fluctuating between 300-500 ppm, the effluent remains stable at below 50 ppm, with an average of 30 ppm.

WYS horizontal oil-water separation technology, with its high efficiency, environmental friendliness, and compact design, has successfully solved the challenging oil-water separation problem in the raffinate of the new materials industry, contributing to the development of the new energy industry. In the future, with technological advancements and the expansion of application scenarios, WYS horizontal oil-water separators are expected to contribute to environmental protection and the achievement of sustainable development goals in even more fields.