Grate and Boiler Technology Assessment for a New WTE Plant in the U.S.

2007 ◽  
Author(s):  
Gregory Gesell ◽  
Matthew Clark
Keyword(s):  
Technology Assessment ◽  
Waste To Energy ◽  
Olmsted County ◽  
Pull Out ◽  
Energy Facility ◽  
Commercial Operation ◽  
Engineering Effort ◽  
Facility Expansion ◽  
Facility Capacity ◽  
The U.S

The Olmsted County Waste-to-Energy Facility (WTE) is in the process of expanding the facility capacity. The original facility began commercial operation in 1987 and consists of two 100 tpd units, equipped with Riley boilers and Takuma grates. The plant was built during the construction boom for WTE plants in the U.S. At that time there were some industry leading technologies, and also were many other players in the field offering European, Japanese, as well as U.S. technologies for the combustion of MSW. The industry has changed since those exciting times when nearly every city and urban county in the country would at least consider WTE. Years of industry stagnation caused by a number of events and trends resulted in the merger, bankruptcy, or pull out of WTE engineering firms in the U.S. market. Today there are only a handful of technologies used and an even smaller fraternity of private operating companies. Many private and publicly operated WTE facilities continue to operate successfully and recently several are in various stages of facility expansion or new plant development. Olmsted County started this process three years ago laying the groundwork for a facility expansion to double its capacity. Currently, the County is in the engineering phase of the expansion and expects to begin construction in 2007. The engineering effort includes consideration of commercially available combustion technologies and procurement of this equipment. This paper looks briefly at the historical availability of grate and boiler technologies and the findings of the County’s assessment of technologies available in the U.S. market.

Unique Elements of the Olmsted County Facility Expansion

2008 ◽  
Author(s):  
Matt Clark
Keyword(s):  
Waste To Energy ◽  
Current Status ◽  
Plant Design ◽  
Olmsted County ◽  
Planning And Design ◽  
Balance Of Plant ◽  
Energy Facility ◽  
Risk Approach ◽  
Major Equipment ◽  
Facility Expansion

Olmsted County is currently expanding their existing waste-to-energy facility in Rochester, Minnesota to add a third mass burn waste combustor. The new unit will have a capacity of 200 TPD, effectively doubling the size of the existing capacity. This paper will discuss some of the unique aspects of this project and review the current status. Some of the interesting and unique features to be discussed include: 1. Environmental Permitting – The county decided to do a voluntary EIS. 2. Project approach – The county is using a Construction Manager at Risk approach for construction of the facility. 3. Engineering – The engineering scope includes several separate procurements of major equipment packages, balance of plant design and several auxiliary projects related to the ‘utility’ system. 4. Operator Collaboration – Olmsted County is one of a few public owners that operate their facility. Their knowledge of the existing facility and of operating a mass burn facility has been used extensively in the planning and design of the new unit.

Superheater Life With Stainless, Inconel, and Carbon Steel Alloys at the Maine Energy Recovery Company

2004 ◽  
Author(s):  
Ken Robbins ◽  
Ken Huard ◽  
John King
Keyword(s):  
Energy Recovery ◽  
Waste To Energy ◽  
Production Operation ◽  
Gas Temperature ◽  
Turbine Generator ◽  
Design Changes ◽  
Energy Facility ◽  
Refuse Derived Fuel ◽  
Commercial Operation ◽  
History Of

The Maine Energy Recovery Company is a refuse derived fuel (RDF) waste to energy facility that began commercial operation in 1987. The facility consists of an RDF production operation, two B&W boilers which produce 210,000 lb/hr of steam at 650 psig/750F with a design Furnace Exit Gas Temperature of 1700 F, and a 22 MW steam turbine generator. Since startup, the facility has suffered fireside erosion/corrosion of the waterwalls, superheater, and generator bank hot side sections. Through the years, Maine Energy has made various operational and design changes in order to improve combustion and overall boiler availability. While combustion has improved as evidenced by improved emissions, reduced supplemental fuel usage, and lower ash production, superheater availability has suffered. At the same time reliability of the waterwall and generating bank components have improved. This paper will present a history of Maine Energy’s efforts to improve its superheater availability including a summary of the tube wastage rates for various superheater alloys, as well as Maine Energy’s plans for its superheaters.

Replacement Operator for the Savannah Waste-to-Energy Facility

2004 ◽  
Author(s):  
Jay Howell
Keyword(s):  
Resource Recovery ◽  
Public Private Partnership ◽  
Waste To Energy ◽  
Processing Capacity ◽  
Private Partnership ◽  
Energy Facility ◽  
Commercial Operation ◽  
Successful Change ◽  
The City

The Savannah Waste-to-Energy Facility (the Facility) is a mass burn waste-to-energy facility with a processing capacity of 624 tons per day. The Facility commenced commercial operation in 1987, as a public-private partnership with the Resource Recovery Development Authority for the City of Savannah, Georgia. In April 2002, Montenay took over operation of the Facility from Katy-Seghers, continuing the established partnership Katy-Seghers had with the City of Savannah. This paper presents a case study of a successful change in operator for a waste-to-energy facility, detailing the hurdles crossed transitioning operation of the Facility to Montenay.

2003 Upgrades at the GVRD Waste-to-Energy Facility

2004 ◽  
Author(s):  
Ron Richter
Keyword(s):  
Energy Recovery ◽  
Saturation Temperature ◽  
Paper Mill ◽  
Waste To Energy ◽  
Fabric Filter ◽  
Energy Facility ◽  
Commercial Operation ◽  
Recycle Paper ◽  
Reverse Pulse ◽  
Pulse Jet

Montenay Inc. has operated the Greater Vancouver Regional District’s (GVRD) Waste-to-Energy Facility since it began commercial operation in 1988. The facility has a throughput of 720 tonnes (800 tons) per day in three lines. It utilizes Martin grate technology and dry lime injection with a reverse pulse jet fabric filter. The original facility design did not include a steam turbogenerator for energy recovery. The facility produced process steam at near saturation temperature to supply a recycle paper mill. The aging mill has reduced the fraction of steam used in recent years. This caused the GVRD and Montenay Inc. to cooperate in a major facility upgrade that began in 2001 and was completed in August of 2003. The complete project includes a turbogenerator, major boiler improvements and modernization of the boiler controls, while continuing to service the recycle paper mill.

Advancements in Grate Cooling Technology

2010 ◽  
Author(s):  
Emily M. Owens ◽  
Joe Szczepkowski
Keyword(s):  
Life Expectancy ◽  
Calorific Value ◽  
Waste To Energy ◽  
Pilot Program ◽  
Technical Paper ◽  
Operation And Maintenance ◽  
Energy Facility ◽  
Cooling Technology

Over the last few years an increase in the calorific value of the waste has been observed at our waste-to-energy facilities. Wheelabrator Technologies, Inc. in conjunction with Von Roll/Inova decided to install a zone of water-cooled grate blocks at the Millbury Massachusetts waste-to-energy facility as a pilot program. Common in Europe these water-cooled grate blocks address the issue of higher BTU waste and increase the overall life expectancy of the blocks compared to regular air-cooled grate blocks. This technical paper provides an overview on the installation, operation, and maintenance of a zone of water-cooled grate blocks. Discussed are the procedures for evaluating the overall project and some of the challenges we resolved.

Odor Monitoring and Mitigation at the Hennepin County Waste to Energy Facility

2007 ◽  
Author(s):  
Jake Smith
Keyword(s):  
Negative Pressure ◽  
Waste To Energy ◽  
The North ◽  
Energy Facility ◽  
Hennepin County ◽  
Parking Lot ◽  
Baseline Information ◽  
Odor Monitoring ◽  
Baseball Team ◽  
The Impact

Hennepin Energy Recovery Center (HERC) is a waste to energy facility owned by Hennepin County and operated by Covanta Energy. HERC has been in operation since 1989. The facility burns 365,000 tons of residential and commercial solid waste per year and generates about 34 mega-watts of electricity that is sold to Xcel Energy. HERC is located on the north side of downtown Minneapolis in the Historic Warehouse District, a neighborhood that is changing from industrial to a more commercial/residential mix with loft conversions and construction of new condominiums. The Minnesota Twins baseball team is also siting a new stadium in the parking lot immediately southeast of the facility. The potential for odors from the tipping floor of the facility affecting the neighborhood has become more of a concern due to the changes in the neighborhood. In March 2004 the County began an odor study. This included developing baseline information on odors from HERC and from the surrounding community by conducting daily odor monitoring at select points on the facility property and throughout the community: • Determining how far odors from HERC migrate into the community. • Quantifying detected odors using a Nasal Ranger. • Determining the factors that contribute to these odors. • Developing a method of controlling these odors. • Continued monitoring to determine the impact of mitigation methods. Odors detected were characterized as garbage odors, garbage-related odors, and neighborhood odors. Baseline data showed that while garbage odors from HERC were mostly undetectable beyond the perimeter of the property, there was room for improvement in decreasing the presence and intensity of these odors. The tipping hall was designed to operate under negative pressure to control odors, however the entrance and exit doors were always open and a negative pressure could not be maintained.

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