RFI Ingredients, a producer of custom extracts and nutritional supplements, requires precision in its processing of ingredients. The company uses steam to heat its
dual-drum dryers, which are used to dry cereal grasses such as wheat, barley, oats and alfalfa. The steam also is used for heat exchangers in heating loops used to make liquid extracts for fermentation tanks, batch pasteurization and liquid blending. As a result, it is the pressure of the steam rather than its temperature that must be very precise.
Given those process constraints, when RFI decided to upgrade its boilers, it looked at equipment that could deliver quick startup from a cold start. After evaluating the options, RFI selected and took delivery on three LX-150 gas-fired boilers made by Miura Boiler, Atlanta. One Miura LX-150 was installed at RFI’s Loveland, Colo., facility, and two more LX-150’s were recently delivered to the company’s Broomfield, Colo., plant.
Miura boilers are microprocessor-controlled and employ a once-through fintube design that heats a smaller volume of water more efficiently than other boilers, according to the company. The design allows the boilers to generate full steam from a cold start in five minutes or less. The combination of microprocessor-control technology and on-demand steam also conserves fuel, saving an average of 20 percent annually on energy costs over other boiler designs for typical installations, Miura says.
The boilers have helped RFI Ingredients with its sustainability goals, providing reduced levels of nitrogen oxides (NOX) and carbon dioxide (CO2). NOX emissions have been reduced to approximately one-quarter of what traditional fire-tube boilers emit, which allows the boilers to comply with stringent air-quality regulations.
“Overall I’ve been very happy and pleased with Miura boilers, and the Miura support people in Dallas are outstanding,” says Ryan Ricketson, RFI plant manager. “They are accessible when I need help. We are committed to Miura because of the workability of their boilers and their customer service, which is what counts. I’m in the business of nutritional supplements and natural extracts, not the business of making steam. With Miura, we can leave that to the boilers, and they do that very well.”