- George Neal Units 3 & 4 Emissions Control Retrofit
Our team provided complete engineering, procurement, construction, and startup and commissioning services as the engineer-procure-construct (EPC) contractor for this turnkey emission control retrofit. The work was completed as part of a joint venture called Neal Station Environmental Partners (NSEP) that included Kiewit Power Constructors Co.
MidAmerican Energy decided to install new air quality control systems (AQCS) on its George Neal Unit 3 (515 MW) and Unit 4 (644 MW). The Neal Energy Center is south of Sioux City, Iowa, on the Missouri River. It is divided into two plants, Neal North, with Units 1, 2 and 3, and Neal South, Unit 4. The Neal North and Neal South plant sites are about two miles apart.
We performed civil, mechanical, electrical, structural and foundation design as well as instrumentation and controls. The controls engineering consisted of integrating a new distributed control system (DCS) for the flue gas desulfurization (FGD) with the existing plant DCS. Spray dryer absorber (SDA) and baghouse design and supply were completed by Alstom.
The project required significant coordination and effort among the EPC partners and with the owner, including coordination of work during scheduled outages and designing and constructing at a space-constrained facility. The limited space at Neal 3 and 4 required innovation and coordination within NSEP and with MidAmerican.
Activated Carbon Injection Program
We also perfomed engineering for MidAmerican Energy’s activated carbon injection program, which included installation of activated carbon injection systems on Units 3 and 4 to control mercury emissions. This project was designed to achieve compliance with construction permit requirements, the Mercury and Air Toxics Standard (MATS) and state regulations.
- AQCS retrofit
- Preliminary engineering
- Construction management
- Detailed engineering
- Pulse-jet fabric filters
- Ash handling system
- Dry lime FGD system
- Induced draft fans