The residual lubricating oil, gear oil, or oil mixed with moisture in the industrial production process cannot be directly discharged, which will cause serious waste liquid pollution to the environment. How should we handle liquids containing residual substances? How to separate, recover, and safely discharge mixed solutions,

The commonly used oil-water separation is an important water treatment technique used to separate oil and water. Its principles and methods are diverse, mainly including:

Gravity separation method

By utilizing the density difference between oil and water, oil with lower density will float to the water surface, thus achieving separation.

Centrifugal separation method

Under high-speed rotation conditions, the oil droplets in the oil-water mixture are thrown towards the inner ring under the action of centrifugal force, forming larger oil droplets and achieving separation.

Electric separation method

By adding electrodes to oily wastewater and utilizing the bubbles generated by electrolysis to adhere to oil droplets, oil-water separation is achieved.

Air flotation separation method

By generating tiny bubbles in water, these bubbles can carry oil droplets up to the surface of the water, achieving oil-water separation.

Chemical separation method

Add flocculants or aggregators to oily wastewater to condense oil droplets into larger particles for easy separation.

Vacuum method

By utilizing the difference in saturated vapor pressure between oil and water, the water in the oil is evaporated by reducing the pressure of the oil level, thereby achieving separation.

Absorption method

Utilize highly absorbent materials to absorb free water and emulsified water from oil, and separate oil and water by increasing pressure.

Sedimentation method

Utilize the density difference between water and oil to slowly deposit free water at the bottom of the oil tank or discharge it.

Fiber aggregator method

By combining diffusion nozzles, corrugated plate coalescers, fine filters, and fiber aggregators, oil-water separation can be achieved.

Today, we will introduce a case of industrial separation and separation of mixed oil products, as well as the recovery of oil products by removing moisture.

The equipment used is a 60KW electric heating mold temperature machine, a 3000L stainless steel reaction kettle inside the outer half tube, without the need for a stirring device, a gear conveying pump, and a system design with an inlet port of DN50 and an outlet port of DN50. The electric heating mold temperature machine sends the heated thermal oil through a hot oil circulation pump into the outer half tube reaction kettle for circulating heating. The heating temperature should not exceed 90 ℃, as high temperatures can cause liquid boiling in the reaction kettle. The heating time is controlled at about 3 hours, During the heating process, an air pump is used to inject air into the bottom of the reaction vessel, causing bubbles to rise and churn inside the vessel. The cooling time is about 3 hours. Turn off the air pump and add the agent. When the temperature drops to 45 ℃, open the discharge valve and observe through the glass stereo that the discharged liquid has separated. The above equipment is a complete set of reaction kettle layer oil separation equipment manufactured by our company for a technology company in Dongguan. The process includes: liquid injection, heating, gas injection, cooling, dosing, laminar flow, recovery, and discharge. I hope it can be helpful for oil treatment and oil recovery projects in the industry.