Kadant Johnson, Inc.

Direct-Steam-Injection Water Heaters
This family of direct-steam-injection water heaters (also referred to as direct-injection heaters) are used to rapidly and accurately heat water and water-based slurries by injecting steam directly into the fluid. They are used in a variety of industrial processing applications, including preheating of boiler feed-water, fibrous slurries (such as pulp stock and biomass), paper starch, and water used for sanitization and tank cleaning, as well as for anaerobic treatment of organic waste and a variety of other applications. Direct injection heating uses all of the sensible and latent heat of steam to heat the fluid, and can provide heating equal to that of indirect heat exchangers while using 20–30% less energy. These heaters are available in 1.5-in. through 6-in. sizes, with other sizes available on request. All units are custom-engineered. With the exception of the actuator and modulating spindle, the direct-injection heater has no moving parts, thereby reducing maintenance and extending service life.

Heaters
This new line of heaters uses direct steam injection to rapidly and accurately heat water and water-based slurries in a variety of process applications, such as boiler feedwater preheating, heating fibrous slurries for pulp stock and biomass treatment, paper-starch processing, sanitization and tank cleaning, anaerobic treatment of organic waste, and others. By using all of the sensible and latent heat of steam to heat the fluid, these systems can provide heating equal to that of an indirect heat exchanger with 20–30% less energy consumption. The standard direct-injection heaters are available in sizes of 1.5 in. through 6 in., with other sizes available upon request.