Monroe Units 1, 2, 3 and 4
Wet Flue Gas Desulfurization System

Detroit Edison
Monroe, Michigan

Contract Order

Units 3 & 4: 2006
Units 1 & 2: 2010

Commercial Operation

Units 3 & 4: 2009
Unit 1: 2013
Unit 2: 2014

Overview

The wet flue gas desulfurization (FGD) system from Babcock & Wilcox (B&W) features a combination of design components to provide a high level of reliability and removal efficiencies. These include B&W’s signature tray tower design that provides excellent gas-to-liquid contact and uniform flow distribution through the absorber spray zones; its patented inlet awning; interspatial spray headers to reduce absorber height, pump power requirements, and internal support costs; forced oxidation system; and advanced mist eliminators.

Boiler/Plant Information

  • (PRB)/bituminous coal blend
  • Design fuel: Powder River Basin
  • Boiler type: Pulverized coal
  • 4 x 825 MW (3,300 MW total)
Project Summary

B&W provided engineering, procurement and construction of the wet FGD system. The system is designed to remove 97% of the entering sulfur dioxide (SO2) without organic acid addition, at an optimal combination of reduced absorber liquor recirculation (L/G) versus tray pressure drop. The system utilizes limestone reagent with forced oxidation to a gypsum byproduct. There is one absorber per unit.

BWCC Construction Services

BWCC provided construction services for all B&W supplied wet FGD system equipment at the Monroe power plant.

 B&W Scope

  • Four (4) wet FGD absorbers (1 per boiler), concrete tower with Stebbins tile construction and 2205 internals
  • Three (3) limestone milling systems (2 operating, 1 spare) Gypsum dewatering system that includes three (3) horizontal
  • table filters (2 operating, 1 spare) Six (6) oxidation air blowers (2 operating, 1 spare for each set of 2 absorbers)
  • Construction of B&W supplied equipment by Babcock & Wilcox Construction Co., Inc. (BWCC), a subsidiary of B&W

 Schedule

  • Units 3 & 4 – The contract for units 3 & 4 was released in April 2006 with startup in June 2009 (Unit 4) and November 2009 (Unit 3)
  • Units 1 & 2 – Units 1 & 2 were awarded in March 2010 with operation scheduled for December 2013 (Unit 1) and May 2014 (Unit 2)

Results

  • Both commissioned units (Units 3 and 4) have met performance guarantees
  • Achieved mechanical and substantial completion on schedule

Computer generated three-dimensional projection of absorber modules at Monroe.

New Build

B&W Projects New Build
We consistently demonstrate the ability to successfully execute innovative solutions for our customers, from new equipment to large, complex full-scope engineering and construction projects.

Upgrades / Retrofits

Upgrades and Retrofits by B&W
Modifying, improving and maintaining existing equipment are vital considerations for the long-term viability and profitability of all operations.

Parts / Services

Babcock & Wilcox Parts and Service Support
An extensive network of worldwide regional service centers, field service engineers and technical support personnel are available to provide the customized service and aftermarket solutions for your requirements.