According to North American Sales Manager Mark Dornoff, “Sonic horns have been used in these applications for some time, dislodging fly ash so that gas flow and gravity will move particulates back into the exhaust stream. Acoustic cleaning is very effective with fuels that have a low ash content, but Western coals and some other fuels tend to produce more ash,” he said. “Low operating loads and associated reduced gas velocities also contribute to excessive ash build-up.”
To address the problem, Martin Engineering has found through extensive testing (both in the lab and on-site) that combining acoustic cleaning with ash sweepers delivers better results than either technology used alone. “The horns are still used to energize the bonded particles, and a timed release of pressurized air from the ash sweepers re-entrain the particles back into the high-velocity zone,” Dornoff observed.
TEAM OF EXPERTS
The new business unit is a way for Martin Engineering to bring together experts in cleaning technology for power generation stakeholders, to deliver solutions that improve process control and increase profit. One of the distinguishing characteristics of the new global team at Martin Engineering is the range of disciplines and expertise that the members have. While other equipment suppliers offer experience in bulk materials handling and mechanical engineering, the new business unit is taking a broader approach by assembling a group that also includes power generation experts.
“There’s some crossover between conventional material handling and these powerhouse applications, but we’ve learned that these are very specialized operating environments, with some unique requirements,” said Stern. “Whether it’s a retrofit
or a new plant, we have the team members who really understand the power generation side and the material handling, which helps us develop customized solutions tailored for each individual customer process.”
In building the Power Generation Solutions team, Martin Engineering has also partnered with SCR-Tech, a respected worldwide provider of SCR catalyst management and regeneration technologies. With the firm’s unique knowledge of coal fired boilers — from burners to stack — and its patented catalyst regeneration process, customers benefit from engineered solutions that deliver significant savings in operating and capital costs. SCR-Tech is the only American-owned and -operated catalyst management and regeneration company in the world.
“By helping plant operators maximize their pollution control system performance and efficiency, we assist them in reducing operating and maintenance costs, lowering risk and maintaining cost-effective compliance with increasingly-stringent environmental regulations,” Stern added. “With this combined cleaning approach, boiler operators no longer have to accept sacrificial catalyst as part of the cost of doing business.”
In addition to marketing existing Martin Engineering sonic horns and ash sweepers, the business unit will be developing new products engineered specifically for power generation applications. These include such designs as the company’s Martin® Mega 75 Acoustic Cleaner, which has demonstrated superior particle displacement over conventional sonic horn designs.