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Oil-water separation and filtration system

The coalescing separator is a metal shell equipped with a primary filter element (filtration coalescing filter element) and a secondary filter element (separation filter element). It is also equipped with manual and automatic exhaust valves, stainless steel drain valves, pressure difference gauges, and direct reading Differential pressure gauge, online sampling probe valve, sampling joint, safety valve and other accessories.

After the gas enters the filter separator, it first collects in the aluminum tray, and then disperses into the coalescing filter element from the inside out. The solid impurities are filtered out through the filter layer in the second step, and the emulsified oil and water are separated through the demulsification layer in the second step.

In the third step, the coalescing layer coalesces the tiny water droplets into large water droplets, which settle in the water collection tank; then, the small water droplets that have not yet had time to coalesce are further separated and settled in the sedimentation tank by the water-repellent effect of the separation filter element, and are discharged from the drain valve . The clean fuel is collected in the secondary tray through the separation filter element and discharged from the outlet of the filter separator.

Coalescence and Separation - Oil, Water and Gas-liquid Filtration 2

The working status of the separator and the working life of the filter element are mainly judged based on the pressure difference. When the inlet and outlet pressure difference reaches 0.15MPa, it means that the coalescing filter element has been blocked and should be replaced.

In addition, when the coalescing filter element is used for more than half a year, replacement should also be considered. The separation filter element is a long-term filter element. If there is no mechanical damage, it can be used for a long time. However, when replacing the coalescing filter element, it should be removed, cleaned and inspected.

Oil-water separation and filtration system 4

Application fields of gas-liquid coalescer
●Protect compressors and turbines
●Remove lubricating oil, water, compressor wear products, corrosion products and other pollutants in the gas
●Reduce solution loss in the gas purification unit
●Protect the gas flow meter to ensure correct indication of flow rate
●Clean fuel gas and protect combustion device
●Prevent clogging of liquid injection holes during gas overflow
●Reduce foaming in the ethylene glycol contact tower
●Protect catalysts, desiccants and adsorbents

Oil-water separation and filtration system 3

Different liquids have different surface tensions. When the liquid flows through the small holes, the smaller the surface tension, the faster it passes. When different mixed liquids flow into the separator, they first enter the coalescing filter element. The coalescing filter element has Multiple layers of filter media with increasing pore sizes layer by layer. Due to the difference in surface tension, oil passes through the filter layer quickly, while water passes through the filter layer much more slowly; and because the coalescing filter element uses hydrophilic materials, tiny water droplets are adsorbed on the surface of the filter layer, causing the water droplets to coalesce.

Under the action of kinetic energy, small droplets compete to pass through the openings and gradually merge into large droplets. They settle under the action of gravity and are separated from the oil. There are still smaller water droplets in the oil after passing through the coalescing filter element. Move forward to the separation filter element under the action of inertia. The separation filter element is made of special hydrophobic material. When the oil passes through the separation filter element, water droplets are blocked outside the separation filter element, while the oil passes through the separation filter element and is discharged from the outlet.

Oil-water separation and filtration system 2

Colloidal droplets and solid particles suspended in the air flow. The size of these aerosols is generally between 0.1 and 0.6 microns, which is very difficult to capture.

The enlargement of droplets in a gas stream or immiscible liquid by collision or fusion. The coalescing system consists of a coalescing filter element. The coalescing filter element adopts a unique polar molecular structure. After the free water and emulsified water in the oil pass through the filter element, it is coalesced into larger water droplets, and then relies on the action of gravity. settle into the water storage tank.

The process by which coalesced liquid drains away from the interior of the media and accumulates at the bottom of the filter element. Chemically treated media fibers work well for this process. When the interface height reaches the set value, open the valve to drain the water until it drops to the lower liquid level, then close the valve to stop drainage.

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The coalescing separator is mainly designed for liquid-liquid separation. It contains two types of filter elements, namely: poly filter element and separation filter element. For example, in the oil water removal system, after the oil flows into the coalescing separator, it first flows through the coalescing filter element, which filters out solid impurities and coalesces very small water droplets into larger water droplets. Most of the coalesced water droplets can be separated and removed from the oil by their own weight and settle into the water collection tank.

Then the oil flows through the separation filter element. Since the separation filter element has good lipophilic and hydrophobic properties, the water is further separated, and the clean, water-free oil flows out of the coalescing separator. The oil first enters the lower part of the filter housing through the inlet pipe, and then flows into the filter element from the outside inward. At this time, the coarser particles will immediately settle and be released from the drain valve, while the smaller particles will be intercepted by the filter element. After the clean oil is collected in the filter element tray, it flows out of the coalescing separator through the outlet pipe. As the amount of oil being processed increases, the pollutants deposited on the filter element will cause the pressure difference in the coalescer to rise.

When the pressure difference rises to 0.15Mpa, it means that the coalescing filter element is blocked and should be replaced. The oil flows into the primary tray from the oil inlet of the coalescing separator, and then flows into the interior of the primary filter element. After filtration, demulsification, growth of water molecules, and coalescence, the impurities are trapped in the primary filter element, and the coalesced The water droplets settle in the sedimentation tank, and the oil enters the secondary filter element from outside to inside, collects in the secondary tray, and flows out from the coalescing separator outlet. The material of the secondary filter element is hydrophobic, so oil can pass through it smoothly, while free water is blocked from the filter element, flows into the sedimentation tank, and is discharged through the drain valve.

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