Scope of application
Core Applications:Wet-process phosphoric acid (WPA) concentration and purification, suitable for single-line phosphoric acid concentration systems with capacities of 30,000–150,000 tons/year, and diammonium phosphate (DAP) plants with capacities of 60,000–600,000 tons/year.
New Energy Materials:Acid treatment, heating, and recovery processes for lithium hexafluorophosphate (LiPF₆) and lithium iron phosphate (LFP) precursor production.
Fine Chemicals:Heating, evaporation, condensation, and heat transfer of phosphoric acid-containing media, as well as acidic material processing in pesticide and dye intermediate production.
Other Industrial Applications:Hydrochloric acid synthesis and cooling in chlor-alkali industries.
Heating and concentration of acidic solutions in titanium dioxide and zirconium processing.
Temperature control of electroplating solutions.
Performance Characteristics
· Main Structure:The equipment adopts a shell and tube graphite heat exchanger structure, consisting of graphite tube bundles, graphite tube sheets, graphite heads, steel shell, spring compensation devices, and anti-swirl baffles.
· Graphite Tube Bundle:Manufactured with pressed graphite tubes and treated in high-temperature infrared furnaces to enhance thermal stability and mechanical strength.
· Uses high-strength modified resin bonding technology, providing excellent bonding strength and preventing leakage.
· Tube Sheets and Heads:Constructed with an integral impermeable graphite structure.
· The tube bundle and heads are bonded as one unit, eliminating the risk of metal contact with acidic media and ensuring reliable sealing performance.
· Shell and Thermal Expansion Compensation:Carbon steel shell designed for pressure resistance.
· Built-in spring compensation structure absorbs thermal expansion differences between graphite components and the steel shell, preventing cracking.
· Flow Optimization:Equipped with internal anti-swirl baffles to reduce dead zones, minimize scale deposition, and improve heat transfer efficiency.
Technical Characteristics
| Item | Specification |
| Design Temperature | -20~130 ℃ (Short-term up to 150 ℃) |
| Design Pressure | Tube Side / Shell Side ≤ 0.4 MPa |
| Thermal Conductivity | ≥80 W/(m·K) |
| Heat Exchange Area per Unit | 50–500 m² (Customizable) |
