Coalescers corrugated plate interceptor

Another type of gravity separator used for small amounts of oily water, the oil interceptor, is widely used both offshore and onshore. These devices work by encouraging oil particles to coalesce on the surface of plates. Once bigger oil droplets are formed they tend to float to the surface of the water faster and can be skimmed off. A corrugated plate interceptor (CPI) is shown below and demonstrates the principle involved. However there are many varieties available. Plate interceptors can typically reduce oil content to 50-150 ppm. 

Plate coalescers. Various configurations of plate coalescers have been devised. These are commonly called parallel-plate interceptors (PPI), corrugated-plate interceptors (CPI) or cross-flow separators. All of these coalescers depend on gravity separation to allow oil droplets to rise to a plate sur-... 

Ftg, S—CPI, or corrugated-plate interceptor, olten used on offshore platforms, requires less deck space than conventional paraDel-oiaie designs. OH coalesces in channels formed t y plate corrugations. 

Plate coalescence Parallel plate interceptors Corrugated plate interceptors Cross-flow separators Mixed-flow separators 30-50... 

Cross Flow Interceptors employ sloping corrugated plates to provide some coalescing effect and to reduce the effective separtion path. They olso provide effective separation of solids which accumulate at the bottom of the plate pock and can be removed by periodic blow-down. They con ochieve very high separation efficiencies but only when designed for known droplet sizes. 

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