Fibrous-Type Mist Extractors

Fibrous packing has been used to remove liquid mist from natural gas since the early . Most of these fibrous packs have been knitted wire mesh. The main use of such mist eliminators has been to remove fine droplets, 10 to 100 pm in diameter. from a stream of gas. Standard mist eliminator pads made of knitted wire mesh have low pressure drop, high separating efficiency, relatively low initial cost, and low maintenance cost. Technical Data used in the field explained in oil and gas courses in Islamabad.

Considerable developmental work was done to improve the separating efficiency of knitted-wire-mesh mist-eliminator pads. It was found that through use of a combination of filaments of different materials and diameters, the separating capacity of the pads could be greatly increased. It was found that a pad 9 in. thick with one 3-m-thick pad of coknitted O.CMlO8-in.-diameter fiberglass filaments and 0.01 l-in.- diameter stainless steel filaments used as the bottom portion and one 6-in.-thick pad of 0.01 l-m-diameter stainless-steel wire mesh as the top portion of the pad would give the highest separating efficiency at the lowest initial cost. In Fig. 12.16. No. 2 is the multifilament bottom portion of the pad, and No. 3 is the coarser monofilament top portion of the pad. Some more details of oil and gas courses in islamabad  are as under.

The extra-fine fiberglass filaments (0.0008 in. in diameter) coknitted with the 0.011 -in. stainless-steel wire used in the bottom portion of the pad will agglomerate mist particles of 1 to 10 pm into larger particles so that the larger-diameter wire fibers (0.011 in. in diameter) used in the upper 6 in. of the mist eliminator can remove these agglomerated particles from the gas. Even though these combination multifilament pads appreciably increased the separating efficiency, they could not be used widely because they would flood at velocities 50% below those of regular (O.Oll-in. diameter) wire pads.

the comparative pressure drop and flooding characteristics of a 6-m-thick knitted-mesh mist eliminator pad made of high-density polypropylene with and without drain cylinders. The fluids used in this test were air and water. The left curve is for the 6-in.-thick pad without drain cylinders. The middle curve is with the same pad but with drain cylinders installed. The straight line marked “Ref. Dry” represents the pressure drop through the same pad with no water in the pad, i.e., with the pad dry. The two points marked “Flood” indicate the air velocity that caused the pad to flood with water. The flood velocity for the pad without drain cylinders was almost 7 fti sec. For the pad with drain cylinders, the flood velocity was 11.8 ftisec. TSK Training for Skills and Knowledge is the best institute in Rawalpindi Islamabad for Pakistani Students who wants to join oil and gas courses in Rawalpindi.