Costs for Two-Stage Precipitators

Purchase costs for modular, two-stage precipitators should be considered separately from large-scale, single-stage ESPs (see Figure ). To be consistent with industry practice, costs are given as a function of flow rate through the system. The lower cost curve is for a two-cell unit without a precooler, installed cell washer, and a fan. The upper curve is for an engineered package system with the following components: inlet diffuser plenum, prefilter, cooling coils with coating, coil plenums with access, water-flow controls, triple-pass configuration, system exhaust fan with accessories, outlet plenum, and in-place foam cleaning system with semiautomatic control and programmable controller. All equipment is fully assembled mechanically and electrically, and it is mounted on a steel structural
skid.

                              Purchase costs for two-stage, two-cell precipitators