FLEXICHEVRON- mist eliminators for flue gas desulfurization
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SEPARATIONS TECHNOLOGY .4 Kooh-Gtitsch, LP business group

KOCH FLEXICHEVRON® MIST ELIMINATORS IN UTILITY, REFINERY, AND OTHER INDUSTRIAL FGD SERVICES FGD Application Koch designs and manufactures a variety of products for flue gas desulfurization (FGD) applications. FGD applications are relevant to large electrical power producers, kiln flue gas for cement production, potline flue gas for aluminum or other metal foundries, flue gas from FCC units in refineries, or other power or process flue gasses which require SO2 removal. Processes vary depending on the amount of SO2 involved, the solution being used to absorb the SO2, and the particular...

Moisture Carry Over PROBLEM FREE DESIGN Mechanical Integrity Pressure Drop Fouling Resistance & Cleaning FLEXICHEVRON® Mist Eliminators Koch-Otto York Design Pentagon Customer requirements are such that Koch designs need to meet a multitude of requirements. For this reason, we have developed a "design pentagon" which ensures no detail will be overlooked in the FGD design Style Style Style Style VIII XII/XIV XXVII XXVIII Polypropylene Steel Temperature in degrees fahrenheit Materials of construction vary widely depending on the customer’s preferences, operating conditions, amount of...

Spray Wash Design for FGD Systems Koch has designed and supplied innumerable FLEXICHEVRON® mist eliminators for many applications for evaporators, process engineering, and air pollution control. Although a benefit of chevron type mist eliminators is their resistance to fouling and pluggage, it is frequently necessary to include irrigation of the chevron. Otherwise, as material builds up on the chevron blades, local velocities increase due to less open area. This substantially increases pressure drop proportional to gas V2 and may result in reentrianment of collected droplets. Irrigation is...

Exact frequencies and wash water volumes can best be determined from plant experience, overall water balance required for the absorber, and total available wash water. The Koch applications engineer can tailor the design to specific customer requirements. Upper Spray wash Header Intermediate Spray wash Header Lower Spray wash Header Side view of a two stage FLEXICHEVRON® and Washing System in a vertical tower.

Koch FLEXICHEVRON® Mist Eliminators for the FGD Industry Koch offers many types of chevron mist eliminators to facilitate the numerous styles of absorbers and internal support arrangements. FLEXICHEVRON® Style VIII Mist Eliminators Multi purpose mist eliminators designed specifically for FGD absorbers where fouling, ease of cleaning low pressure drop, and dependability are important. The Style VIII continues to occupy the majority of Koch FGD applications due to its rugged construction and low moisture carryover. The Style VIII can be used in either vertical or horizontal gas flow. The...

chevron of interest with an air-water system at ambient conditions. From the critical velocity, above which reentrainment occurs, and the known physical properties of the air-water system, (Fs)critical and (Rn)critical can be determined. The critical reentrainment number can then be applied to other systems or conditions to determine the maximum capacity for a given chevron. How do you Rate a FLEXICHEVRON® By considering various force balances for detachment or shattering of droplets, and by considering the terminal velocity of the droplets so formed, it can be shown that reentrainment is...

Pressure Drop of FLEXICHEVRON® Style VIII (3 Pass) Horizontal Gas Flow Pressure Drop of FLEXICHEVRON® Style VIII (2 Pass) Horizontal Gas Flow pressure Drop, mbar. pressure Drop, mbar. Pressure Drop of FLEXICHEVRON® Style XXVII Vertical Upflow Pressure Drop of FLEXICHEVRON® Style XII-1.5 & XIV-2.5 Combination Vertical Upflow Style VIII (3-Pass) Style XXVII Style VIII (2-Pass) Style VIII (3-Pass) Style XXVII Style XII/XIV Style VIII (2-Pass) INCREASING CAPACITY Style XII/XIV INCREASING EFFICIENCY FLEXICHEVRON® HIERARCHY DECREASING ∆P Limit Drop Size, Microns Limit Drop Size, Microns Vertical...

Mist Measurement and Conformation of Mist Elimination Performance Koch-Otto York routinely supplies the services for measuring the overall performance of the mist eliminator. This is done using the Phase Dopper Particle Analyzer (PDPA) which is a sophisticated laser-based instrument capable of accurately measuring droplet size and velocity. The PDPA has been used in the field since 1992, at numerous Utility power plants and at scrubber supplier R&D facilities. The PDPA was determined to be the "most accurate measurement method tested" in a joint study involving the Electric Power Research...

PDPA Measurement Verification The PDPA was compared to other measurement methods in a test program sponsored by EPRI in 1994. The other two methods included a hot wire anemometer (AIMS) method, and, a MgO/treated paper method which measures the number and size of droplets by impaction. Direct moisture carryover was measured by the testing laboratory, and verified independent of the measurements taking by the PDPA. Neither team of operators knew the results obtained by the other. A third party independent contractor took the data from both teams and compared the results. This eliminated any...

Keeping you at the forefront of technology Koch has strong commitment to research at our Research Center in Wichita, KS, where we are developing new mist eliminator designs and solving our customers’ most complex problems. In FGD, Koch has continuing programs to develop lower pressure drop, higher capacity chevron designs, evaluate and optimize wash water systems designs, analyzing absorber designs and to apply new methods to validate field performance using the Phase Doppler Particle Analyzer. Using the Phase Doppler Particle Analyzer, performance data is taken in the horizontal flow test...

Koch-Glitsch Corporate Ofces Worldwide Headquarters Koch-Glitsch, LP 4111 East 37th Street North North American Ofces Koch-Glitsch, LP Koch-Otto York Separations Technology 6611 Killough Road 4111 East 37th Street North European Ofces Koch-Glitsch B.V.B.A. Koch-Otto York Separations Technology Bijkhoevelaan 12 Koch-Glitsch Italia, S.r.l. Koch-Otto York Separations Technology Viale Giulio Cesare 29 Trademarks DEMISTER, FLEXICHEVRON, FLEXIFIBER, KOCH-OTTO YORK, KOCH-GLITSCH and OTTO YORK and design (Football) are registered trademarks of Koch-Glitsch, LP. YORKMESH, YORK-EVENFLOW and...