For industrial processors that need to heat water and water-based slurries, direct steam injection might be the answer.

Understanding the industrial markets that need to rapidly and accurately heat water and water-based slurries by injecting steam directly into the fluid, Kadant Johnson Inc., Three Rivers, Mich., has introduced a direct steam-injection water heater product line.

Direct injection heaters are used in many processing applications, including preheating boiler feedwater, pretreatment of fibrous slurries such as pulp stock, pretreating biomass, paper-starch processing, sanitization, tank cleaning and anaerobic treatment of organic waste.

"Direct injection heating uses all the sensible and latent heat of steam to heat the fluid," says Gregory L. Wedel, Kadant's president. "It can provide equal heating to that of an indirect heat exchanger process with 20 percent to 30 percent less energy. The improved energy efficiency results in less steam consumption with no reduction in output. This new product line complements our existing steam specialty products to maximize energy efficiency in process industries.”

The units come in sizes 1.5 through 6". With the exception of the actuator and modulating spindle, the direct injection heater does not have any moving parts, giving it high reliability and long service life.