Application Pulp & Paper Recycled Stock Bleaching
| Market |
Pulp & Paper |
| Application | 11% recycled fiber stock |
| Heater Replaced | Sparger |
| Hydro-Thermal Solution | Industrial Hydroheater® |
| Benefits | Precise temperatures, reduced maintenance, lower chemical costs, better paper quality |
Pulp & Paper Mill Replaces Sparger to Heat Recycled Stock to Optimal Temperature with DSI
Sparging steam into a fiber line through a small number of injection points, this recycled mill struggled with uneven heating of recycled fiber stock. Inconsistent heating resulted in inefficient bleaching. Hot spots contributed to fiber degradation and excessive scaling, compromising stock yield and quality and necessitating quarterly acid boilouts. Process engineers sought to more precisely add heat to the bleaching process, reducing the amount of bleaching chemicals required and minimizing the boilout routine.
The solution was to install a Solaris® straight-through direct steam heater that delivered immediate process improvements.The patented 3 way valve heater features rotary choked flow and discharges steam into stock through hundreds of injection points at very high velocity.This process assures instantaneous condensation and homogeneous heating of stock.
The mill reports no fiber degradation problems, chemical usages is lower and saves the mill thousands of dollars each month.The drop in chemical usage provides a significant reduction in volatile emissions. Boilouts have been reduced to once a year instead of quarterly.
Operating Conditions:
| Flow rates | 140 225 gpm [5.2 8.5 kl/min] |
| Inlet temperature |
105°F [40.5°C] |
| Outlet temperature | 125°F [51.6 °C] |
| Fluid supply pressure | |
| Steam pressure | 92 110 psig [6.3 7.5 bar] |
Unlike heat exchangers or spargers, the Hydroheater® is designed only for your process conditions and unique application. We need to know a few things about your conditions, such as temperature range, steam pressure, and flow rates to size a heater specifically for you. When you click on our application data sheet and fill in the information, we will contact you within one business day. After an initial conversation with a sales representative or one of our engineers, we will then provide you with a custom quote for the Hydroheater best suited for your process.
Yes, I want to save energy and have more control using direct steam injection. Please complete the Application Data Sheet which helps us understand your process conditions such as fluid density, flow rates and temperature parameters.
