Sulfur Pit High-temp acid protection
For sulfur pits, acid/heat resistance, and structural safety
Concrete can corrode below pH 5.6. Anti-corrosion protection helps preserve structural safety and service life.
Crude oil contains about 0.5–2% sulfur. To reduce sulfur content, corrosion, and pollution, sulfur is recovered as hydrogen sulfide, condensed in sulfur pits, then sent for recovery.
Sulfur melts at 115.21°C. In the pit, it is heated to 145°C, while the upper air zone reaches about 121°C. Sulfur pits are usually underground reinforced concrete structures.
Concrete resists heat, but not long-term acid gas or liquid. Organic resins are hard to use under both heat and acid. HydroWall Liquid Glass is inorganic, heat-resistant, acid-resistant, and durable.
After years of use, failed lining can lose protection, block sulfur pumps, stop pit operation, and affect refinery equipment.
Each sulfur pit needs about 300 m² of HydroWall Liquid Glass. Within a 20-day shutdown, the team removes old lining, clears sulfur, prepares the surface, repairs concrete, applies the system, and hands over for restart.
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