Environmental System Upgrades & Parts

B&W’s broad range of experience and expertise in emissions control provides the insight necessary to evaluate, recommend and implement cost-effective solutions to improve system performance.

We work as a team with our customers to develop Net Present Value (NPV) calculations to analyze the profitability of proposed solutions to determine the best approach forward to support your emissions compliance programs.

As experts in this field, we recognize and take advantage of opportunities to apply proven technology to existing equipment that provides tangible benefits for our customers.

As a single-source supplier, B&W provides a complete package of integrated environmental upgrade and aftermarket services, including:

  • Engineering assessment of recurring issues

  • Upgrades for aging equipment

  • Replacement parts

  • Installation and construction services

  • Startup and commissioning

  • Performance testing and monitoring

  • Field engineering services

  • On-site inspections

  • On-site training programs

B&W supports environmental system upgrades, services and replacement parts for equipment originally supplied by us as well as other manufacturers.

Our experience includes:

Upgrades for Wet FGD Absorbers & Systems

Upgrades for Wet FGD Absorbers and Systems

Absorber Trays

  • Improves gas-liquid contact for increased SO2 removal efficiency

Installation of hydroclones for primary dewatering

  • Increases reliability by reducing mist eliminator plugging
  • Decreases module downtime by minimizing manual cleaning

Installation of dewatering equipment (belt or rotary drum filters)

  • Reduces makeup water and enhances marketability of byproducts

Forced Oxidation System

  • Minimizes scaling from a more stable system chemistry
  • Creates calcium sulfate (gypsum) as a marketable byproduct

Mist Eliminator Wash System

  • Increases reliability by reducing mist eliminator pluggage
  • Decreases module downtime by minimizing manual cleaning

Optimized Absorber Spray Headers and Nozzles
  • Improves gas-liquid contact for increased SO2 removal efficiency

Recirculation Pumps

  • Increases/optimizes delivery of reagent (limestone) to the system for improved SO2 removal

Selected Project Examples



Competitor wet FGD retrofitted with B&W's dual tray technology

  • Increased SO2 removal from 83 to 98% 

Full condition assessment of wet FGD system; upgraded absorber pumps and spray headers/nozzles; upgraded and replaced reagent preparation and dewatering equipment

  • Increased SO2 removal from 91 to 99%
  • Increased reliability
  • Reduced maintenance

Major upgrade of wet FGD system: conversion to forced oxidation; new absorber trays; new spray headers and nozzles; new mist eliminator blades and wash system; additional milling capacity; new hydroclones and belt filters

  • Increased SO2 removal from 85% to 95%
  • Production of saleable gypsum (reduced byproduct disposal costs)
  • Reduced maintenance
  • Reduced footprint

Performed upgrades to trays, mist eliminators and waterwash system on four wet FGD units

  • Increased reliability
  • Reduced maintenance

Converted a wet FGD to limestone reagent


  • Lowered system operating cost
  • Increased reliability
  • Reduced maintenance

Added spray dryer absorber module for increased load

  • Increased reliability
  • Reduced system pressure drop

Process tuning for a dry FGD system

  • Lowered lime consumption
  • Increased operating flexibility

ESP rebuild with a top rapped system

  • Increased reliability
  • Reduced maintenance

Dry sorbent injection system

  • Reduced SO3 emissions generated across SCR to eliminate blue plume
  • Reduced acid formation potential in ductwork and ESP