Advanced Moistening Control System

DOX SprayTech^Fine Description
The most important properties of a fine droplet spraydampening system are its profiling capability and its ability to control the average moisture level. These two properties improve the sheet's cross-directional moisture profile and optimize the paper machine's productivity and runability.

The critical proprietary component of the system are the patented DOX two-stage nozzles that create a balanced and application matched mixture of air and water. The water nozzles are located in the center of the air nozzles. Directional vanes integrated into the nozzle create a rotational air flow from the nozzle. The rotating air pulls the water from the nozzle and transforms it into a highly atomized, full cone spray pattern that is efficiently applied to the web. The fine droplet size increases the absorption into the web.

The DOX SprayTech^Fine system consists of a sprayboom on which proprietary, two-stage nozzles are mounted; control station; air supply unit and water supply unit.

Control Station is for operation of the spray dampener. Each single nozzle is connected with an individual flow meter and regulation valve for selective water control. The total flow is automatically measured and shown on a display.

Integrated control with PLC for all systems.

The preselected total quantity of water is automatically varied when individual nozzles are adjusted. The system allows acurate control of moisture profile.

Benefits to the Paper Industry

• increased production and flatter moisture profile can be achieved simultaneously
  
• provides better edge performance for improved reel building
  
• reel average moisture increased 0,5 - 4,0 %
  
• energy savings derived from a level moisture profile and higher average moisture
  
• improved tension profile and reel building
  
• increased caliper and flatter caliper profile
  
  
  
  

Advanced Moistening Control System Layout