In the demanding environment of paper mills, high-performance butterfly valves are indispensable due to their corrosion resistance, wear resistance, tight sealing, and excellent control capabilities. They are widely used in critical areas to meet production process and environmental requirements.
1. Pulping Workshop
- Pulp Transfer Pipelines: Control the flow of high-concentration pulp (containing fibers and chemicals) and prevent clogging. Abrasion and corrosion-resistant butterfly valves (e.g., rubber or PTFE lined pulp valves) are necessary.
- Chemical Systems: Handle cooking liquors (e.g., sodium hydroxide, sodium sulfide) and bleaching agents (e.g., chlorine dioxide) with corrosion-resistant, bi-directional sealing butterfly valves (e.g., 316L stainless steel) to ensure zero leakage.
2. Paper Machine System
- White Water Circulation Pipelines: Regulate the flow of white water (a suspension of fibers and fillers) to maintain stable paper machine operation. Quick-installation butterfly valves enable fast maintenance and reduce downtime.
- Steam and Condensate Systems: High-temperature butterfly valves (e.g., metal-seated) control steam pressure for efficient drying section operation.
3. Alkali Recovery System
- Black Liquor Evaporation and Combustion: Handle high-concentration black liquor (containing alkali and organic matter) with temperature and pressure-resistant butterfly valves (e.g., triple offset metal-seated) to prevent clogging from media crystallization.
- Causticizing Tanks: Bi-directional sealing butterfly valves precisely control lime milk injection and prevent cross-contamination.
4. Environmental Protection System
- Desulfurization and Denitrification Systems: Handle sulfur dioxide and nitrogen oxides in flue gas with corrosion-resistant 2507 duplex steel butterfly valves (e.g., D671XH) to withstand acidic media and high-pressure differentials.
- Wet Electrostatic Precipitator Systems: Maintain sealing in humid environments to prevent leakage and ensure dust removal efficiency.
- Wastewater Treatment Ponds: Abrasion-resistant butterfly valves control wastewater containing suspended solids, ensuring stable biochemical treatment.
5. Auxiliary Systems
- Compressed Air/Nitrogen Pipelines: Pneumatic butterfly valves enable quick opening and closing, controlling the gas supply for pneumatic equipment (e.g., vacuum systems, doctor blades).
- Ventilation Systems: Manual or electric ventilation butterfly valves regulate airflow in the workshop, maintaining a safe production environment.
Selection Criteria
- Material: Prioritize 316L stainless steel, 2507 duplex steel, or PTFE-lined butterfly valves for corrosive media compatibility.
- Sealing Design: Choose EPDM, silicone, or metal-seated seals for zero leakage, especially in high-temperature or particle-containing media.
- Actuation: Select pneumatic (fast response), electric (precise control), or manual actuators based on automation needs.
- Structure: Consider quick-installation (easy cleaning and maintenance), lug-style (space-saving), or triple offset design (reduced wear, extended service life).
High-performance butterfly valves significantly improve production efficiency, reduce energy consumption, and ensure environmental compliance in paper mills. They are key components for optimizing process control.
Contact Shengfei today for high-quality butterfly valve solutions tailored to your paper mills processing needs.
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Mail: sales@shengfeimachinery.com