Paper Mill Black Liquor Foam Overflowing? High-Efficiency Defoamer Help You Break Through and Boost Efficiency!
Are you troubled by the abundant foam generated during the paper and pulp manufacturing process, particularly in the black liquor treatment stage? This foam not only reduces production efficiency and increases energy consumption but can also lead to a series of challenging issues such as evaporator overflow, material loss, reduced effective equipment capacity, and environmental pollution. Therefore, selecting a highly efficient, stable defoamer specifically designed for this demanding system becomes a critical step in ensuring smooth paper production and enhancing the quality of the final product.
Black liquor is the wastewater discharged after cooking pulp in the papermaking process, containing large amounts of lignin, hemicellulose, inorganic salts, and other organic substances. Surfactants within these components—such as lignin derivatives, fatty acid salts, and hemicellulose—reduce the liquid's surface tension, making it highly prone to forming stable and persistent foam. The presence of foam disrupts subsequent stages like pulp washing, concentration, and evaporation, and can even compromise paper quality.
Requirements for an Excellent Defoamer
High-temperature and strong-alkali resistance: Black liquor systems typically operate under high-temperature and strongly alkaline conditions. The defoamer must remain stable under these conditions without breaking emulsions or losing defoaming efficacy.
Strong foam suppression capability: The defoamer rapidly eliminates existing foam and effectively suppresses foam reformation over extended periods, requiring minimal dosage while delivering long-lasting results.
Excellent Dispersibility and Penetration: The defoamer rapidly disperses within the complex black liquor system, penetrates foam surfaces, and effectively suppresses foam formation.
Chemical Stability and Equipment Compatibility: The defoamer resists demulsification and oil separation, does not adhere to equipment, and avoids negative impacts, contributing to stable production line operation.
Environmental Friendliness: The defoamer is readily biodegradable, environmentally friendly, and meets increasingly stringent environmental requirements.
DEFOAMER1820: The Solution to Black Liquor Foaming Challenges
For the complex pulp black liquor system characterized by high temperature, strong alkalinity, and high organic content, our DEFOAMER1820 silicone defoamer emulsion was developed to precisely address industry pain points through its performance parameters and design philosophy:
1. Superior Foam Elimination and Suppression: Powered by an efficient active ingredient based on organopolyether-modified polysiloxane, DEFOAMER1820 rapidly penetrates and disrupts stable foam generated by lignin and other surfactants. It delivers fast, powerful, and long-lasting defoaming and foam suppression effects, targeting the root cause of foam formation.
2. High-Temperature, Strong-Alkali, and High-Shear Resistance: Designed for black liquor systems' extreme conditions—typically reaching 80°C or higher with high pH levels—DEFOAMER1820 exhibits excellent high-shear stability. It remains consistently effective during intense circulation and agitation in pulping, washing, and black liquor concentration processes, resisting emulsion breakdown for sustained, reliable performance.
3. Excellent Storage Stability: A milky white viscous liquid with consistent quality, DEFOAMER1820 can be stored long-term without concern.
4. Good Water Dilutability and Dispersibility: DEFOAMER1820 is convenient to use, disperses uniformly in black liquor systems, and acts rapidly.
5. High efficiency with low dosage: The inherent efficiency of organosilicon compounds means significant results are achieved with minimal addition, offering outstanding cost-effectiveness. Recommended dosage is typically 0.03%–0.1%, adjustable based on actual foam conditions.
6. Safe and reliable: Chemically inert, non-toxic, and harmless, meeting industry requirements for environmental safety.
Contact us to experience DEFOAMER 1820 today!
