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.
With major product releases coming from big names like Sony, Microsoft, and Samsung, and big investments by companies like Facebook, 2015 could be the year that virtual reality (VR) and augmented reality (AR) finally pop. Here's take a look back at some of the technologies that got us here (for better and worse).
Good engineering designs are those that work in the real world; bad designs are those that don’t. If we agree to set our egos aside and let the real world be our guide, we can resolve nearly any disagreement.
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.