Sale of fly ash is a flourishing business for many electric utilities. In fact, some 12 million tons of fly ash produced by coal-fired electricity plants in the U.S. are sold to the cement and concrete industries. However, this business may be in danger. Many utilities find that nitrogen oxide (NOx) reduction equipment installed to meet Clean Air Act emissions standards can increase the unburned carbon content of fly ash, making it unmarketable. A new technology, Carbon Burn-Out (CBO), could solve this problem. Designed around fluidized-bed combustion, the process provides temperature, residence time, and oxygen content at values optimized for fly ash carbon combustion. The system's hot restart and cycling capability is similar to that of fluidized-bed steam generators in its ability to quickly recover from a trip condition or short-term forced outage. Not only does CBO produce a high-quality, low-carbon fly ash, but the heat recovered in the process improves the efficiency of the host power plant. Based on successful tests conducted by the Electric Power Research Institute (EPRI) at a pilot plant operated by South Carolina Electric & Gas, the utility has constructed a full-scale facility designed to produce about 160,000 tons of the low-carbon fly ash per year. E-mail email@example.com.
The promise of the Internet of Things (IoT) is that devices, gadgets, and appliances we use every day will be able to communicate with one another. This potential is not limited to household items or smartphones, but also things we find in our yard and garden, as evidenced by a recent challenge from the element14 design community.
If you didn't realize that PowerPoint presentations are inherently hilarious, you have to see Don McMillan take one apart. McMillan -- aka the Technically Funny Comic -- worked for 10 years as an engineer before he switched to stand-up comedy.
The first Tacoma Narrows Bridge was a Washington State suspension bridge that opened in 1940 and spanned the Tacoma Narrows strait of Puget Sound between Tacoma and the Kitsap Peninsula. It opened to traffic on July 1, 1940, and dramatically collapsed into Puget Sound on November 7, just four months after it opened.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.