Pulp Process Examples
Replace heat exchangers or spargers to achieve precise temperature control, save time, energy and maintenance.
Chlorate Unloading of Railcars 10-20% of product can remain undissolved in railcars and returned to the chemical manufacturer if the water is not at proper temperature. By replacing your old heating system with a Hydroheater, you will improve your railcar unloading process by:
» Properly diluting all of the NaClO3
» Achieving accurate temperature control
» Improving employee safety with toxic fumes
» Saving time reaching optimal temperature
Hydro-Pulper Ideally, diluted stock temperature should be kept at 120-140°F for the paper machine headbox; which is usually attained by diluting the stock with whitewater warmed by the paper machine. However, during start-up of a machine after an extended shutdown, there is no white water available. Spargers are typically used to heat the stock in the hydro-pulper, but tend to have issues with inconsistent heating, damage to the vessel and lengthy heat up time. By replacing a sparge system with a direct steam injection Hydroheater in-line to the pulper, you will achieve:
» Precise temperature control
» Reduced pulping time
» Consistent wet-end chemistry
» Higher quality paper
» Lower maintenance costs
Pulp Bleaching Effectiveness Typically, most bleaching methods utilize medium consistency pulp (10-14%) or low consistency (3-6%) pulp, at temperatures of 100-180°F. Temperature is a key variable in bleaching effectiveness and steam is often sparged into the pulp line prior to the addition of bleaching chemicals. Spargers are often ineffective in this role due to pulp plugging the sparging orifices, or due to the difficulty of maintaining accurate temperature control. By utilizing a direct steam injection heater, you will:
» Achieve higher brightness levels and more uniform stock quality
» Attain optimal precise temperature control
» Decrease chemical usage
» Maintain optimum wash water temperatures for better down-stream process
Other pulp processes that benefit from direct steam injection are: stock washing, tank heating and log de-icing
