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| Recovery Boiler Performance Analysis | Fuel Carryover and Gas Emissions Analysis | Combustion Air Analysis and Optimization | Results of Modeling |
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| Recovery Boiler Performance Analysis | Fuel Carryover and Gas Emissions Analysis | Combustion Air Analysis and Optimization | Results of Modeling |
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IAE offers a comprehensive analysis and optimization of your boiler that will:
Recovery and power boilers are used in pulp and paper mills to produce process steam and electrical power by burning black liquor and biomass fuel. In times of high demand, recovery boilers are often a bottleneck for mill production. Operating a boiler above the design load often leads to problems such as excess carryover, high combustion gas emissions, elevated thermal stresses, and fuel bed instabilities. Most boiler designs and modifications are based on experience and simple physical modeling. The complex nature of the turbulent gas flow and combustion in the boiler limits this type of approach, often leading to unsatisfactory results. Process modeling is a powerful analysis tool; when used wisely and combined with years of industrial modeling and boiler consulting experience, it is a powerful money saving tool.
IAE works closely with expert boiler modelers with years of experience with research and commercial codes (e.g. AFT). IAE will work closely with mill personnel to collect information necessary to set up and run the recovery boiler model. The modeling team then sets up and runs a base boiler model that includes all geometry, flow, and chemical characteristics. Detailed results of the simulation are presented in the form of images and graphs showing gas flow velocities, gas temperatures, combustion gas species distributions, fuel and carryover distributions, wall heat transfer distributions, and a host of other relevant information. Computer animations of the combustion air and fuel particulate may also be included for operational training. Simulation results allow for a thorough understanding of the boiler operation, and provide the basis for optimizing the existing air and fuel system. In some cases it may be sufficient to improve the boiler's operating practices, in other cases it may be beneficial to retrofit the boiler with a new air or fuel delivery system. The decision depends on the severity of the operational problems and the budget available for the boiler upgrade. Any of these changes can be evaluated in advance using process modeling, helping to minimize risks in the decision making process. The modeling result are shown to the mill throughout the design process and used to obtain a boiler retrofit that will provide the expected results.