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Biomass Boiler Feed Systems Gain Global Acceptance |
March 09, 2009 |
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Posted by Ted Gentile at March 9, 2009 01:51 PM |
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Recently Jeffrey Rader Corporation has been selected as supplier of Alternative Fuel Boiler Feed Systems in
The system in Korea
It replaces an older coal fired boiler with a new grate fired system with a bubbling fluidized bed design. This alternative fuels system is capable of firing a mixture of waste products such as bark, Refuse Derived Fuel (RDF) pellets, DIP sludge and plastics rejects from the mill’s recycled fiber process.
Jeffrey Rader’s material handling and boiler feed system will supply more than 30 tons per hour of waste fuels to the BFB Boiler. The system employs pneumatic conveyors to transport fuel to a receiving hopper, which then distributes fuel into two boiler house mounted storage silos. Fuel is then reclaimed with screw reclaimers and distributed and metered into four infeed points around the boiler.
On the other side of the globe, Jeffrey Rader is supplying a biomass utility boiler feed system in
Four identical boiler feed systems will supply more than 195 tons per hour of wood chips and forest residuals to two boilers. The system accepts pre-sized material from a conveyor and meters it into the boiler with high accuracy and reliability.
Jeffrey Rader brings to the
In addition to mechanical feeding systems, Jeffrey Rader has developed a leadership position in the direct injection of biomass fuels in pulverized coal boilers. Jeffrey Rader recently contracted for the supply of 24 direct pneumatic injections systems to co-fire biomass with pulverized coal in the Drax Power Station in
In the past boiler feed systems were often comprised of individual pieces of equipment supplied by multiple vendors. As a result of their recent merger, Jeffrey Rader has the ability to provide all of the necessary equipment for the entire boiler feed system from one company. It’s proving to be a combination that’s highly effective in helping organizations meet their cost objectives, time constraints and engineering capabilities.
Ted Gentile
International Sales Manager,
Jeffrey Rader Corporation
Comments
Surprised to learn of co-firing PC and biomass since i understand that they have totally different combustions! how does that work? any literature available on that?
Posted by: Jean Michel Quevauvilliers at April 21, 2009 07:51 AM
Co-firing of biomass with PC has become commonplace in the last few years. The key to successful co-firing is in the selection and preparation of the biomass fuel itself. Typically fuel is 12% moisture content or less and of a particle size which assures that it will fire is suspension, generally less than 2 mm in size. Preparing the fuel in this way also allows for co-firing in the existing burners reducing overall project costs.
There are several ways to co-fire biomass. Early projects saw biomass being blended with the coal prior to the pulverizers in an attempt to reduce capital and operating costs. This practice has been generally successful but limits the maximum percentage of biomass which can be fired as well as introducing new maintenance and operational issues related to attempting to use existing equipment in ways never intended. Newer projects typically bypass the coal pulverizers and include new storage silos, hammer mills for sizing of the biomass and independent material handling systems for processing and conveying biomass separate from the PC until just prior to injection.
Co-firing biomass with PC is generally a European practice due to carbon trading opportunities and legislative requirements. However, new interest has been generated in North America recently and power utilities are beginning to investigate biomass co-firing opportunities.
It may be interesting to note that a large percentage of the biomass being co-fired is non-woody agricultural biomass such as short rotation crops and crop residue such as rape seed, sunflower seeds, grasses, corn stover, etc.
There are many articles to be found on the internet regarding co-firing pulverized coal with biomass.
Posted by: Ted Gentile at April 21, 2009 10:57 AM
