Fuel moisture sensor for biomass plants
Emerson Process Management has integrated a fuel moisture sensor into their Ovation control system to allow continuous monitoring of biomass feedstock for moisture content.
Emerson Process Management now offers an integrated solution that enables biomass-fuelled power plants to continually monitor feedstock moisture content and adjust the combustion process for better efficiency. The solution, which combines a biomass fuel moisture sensor with Emerson’s Ovation expert control system, can help reduce maintenance costs as well as boost net yearly MWh production.
Biomass fuels vary considerably in their energy content. Fuel that has high moisture content will generate less heat and will have a significant effect on energy recovery in steam generators. The traditional method of controlling the combustion process is by monitoring the flue gases and adjusting the combustion air to give the best efficiency. However, rapidly changing fuel quality and boiler characteristics can make maintaining optimum conditions difficult.
Emerson’s new integrated solution continuously monitors fuel for moisture content as it is being fed into the combustion chamber. The Ovation system uses this data to adjust the combustion air to match the characteristics of the fuel based on the master set-point output (MWe steam or pressure), boiler response and the thermal cycle overall. This enables the plant to react much more quickly to changes in fuel moisture content, maximizing combustion efficiency.
Suitable for new or existing installations, the system comprises a small skid that takes biomass fuel from the transport system, measures its moisture content using microwave technology and returns it to the transport system.
The moisture sensor is connected via Ethernet to the Ovation system, providing an input to the boiler and thermal-cycle control logic. The data provided is analyzed to provide fast and accurate information on the temperature and moisture content of the feedstock.
Monitoring and controlling combustion air can dramatically influence profits and costs of boiler operations. Excess oxygen does nothing to improve combustion. Instead, it actually serves to reduce boiler efficiency by absorbing heat that could be used in steam production. Ovation helps to modulate the amount of air in the system to provide the exact amount of air that the system needs, ensuring efficient combustion.
Emerson Process Management
- See more Control Engineering sensor products.
Case Study Database
Get more exposure for your case study by uploading it to the Plant Engineering case study database, where end-users can identify relevant solutions and explore what the experts are doing to effectively implement a variety of technology and productivity related projects.
These case studies provide examples of how knowledgeable solution providers have used technology, processes and people to create effective and successful implementations in real-world situations. Case studies can be completed by filling out a simple online form where you can outline the project title, abstract, and full story in 1500 words or less; upload photos, videos and a logo.
Click here to visit the Case Study Database and upload your case study.
Annual Salary Survey
In a year when manufacturing continued to lead the economic rebound, it makes sense that plant manager bonuses rebounded. Plant Engineering’s annual Salary Survey shows both wages and bonuses rose in 2012 after a retreat the year before.
Average salary across all job titles for plant floor management rose 3.5% to $95,446, and bonus compensation jumped to $15,162, a 4.2% increase from the 2010 level and double the 2011 total, which showed a sharp drop in bonus.