Race Against Time: Volm Vacuum Pumps Secure Production in 32°C Heatwave
In the summer of 2022, a fine chemical plant in East China faced critical production bottlenecks in solvent recovery. Their existing liquid ring-Roots system suffered vacuum degradation from the designed -0.098 MPa (G) to -0.07~-0.08 MPa (G) at ambient temperatures ≥32°C. This caused downstream Roots pumps to fail, forcing production cuts. Plant Manager Wang noted: "Last July-August, weekly output averaged just 6 tons with moisture content spiking to 12%, driving customer complaints up 400% YoY." To address energy efficiency and yield demands, Volm replaced the system with a screw-Roots system (DMY600 Roots + DMY300 Roots + ESDP900 Screw Pump), enabling year-round stable operation.
Three Failures of Previous System
1.Throughput Collapse in Heatwaves
• Designed weekly capacity: 30 tons | Actual summer 2022 output: 6 tons (only 20% utilization of capacity);
• Daily system restarts (3 times) took 2.5 hours each for pump-down;
• Order delay rate: 67% | Penalties: over ¥2 million.
2.Quality Crisis: 80× Moisture Excess
• Specification: ≤0.15% moisture | Summer reality: 12%;
• Purity loss increased rectification energy consumption by 42%;
• Return rate: 18% of sales | Complaints: +400% YoY.
3.Energy Drain & Hidden Costs
• System power: 82.5 kW (75kW liquid ring + 7.5kW Roots) | Efficiency: <50%;
• Contaminated cooling water required ¥86k/year wastewater treatment;
• Summer chiller power: extra ¥130k/quarter.
Volm’s Engineering Solution
Root Cause:
At 38°C, liquid ring working fluid (water) vapor pressure hit 6,610 Pa, creating 10 kPa Roots pump pressure differential that prevented startup.
System Upgrade:
Screw-Roots vacuum systems eliminates temperature sensitivity through dry compression technology.
Operational Results
| Metric | Previous System | Volm System | Improvement |
|---|---|---|---|
| Effective Pumping Speed (L/s) | 250 | 600 | +140% |
| Stable Vacuum (Pa) | 1200 | 400 | +200% |
| Weekly Output (tons) | 6 | 84 | +1300% |
| Moisture Content (%) | 12 | 0.14 | -99% |
| System Power (kW) | 82.5 | 30 | -63% |
| Annual Power Cost (¥) | 604800 | 172800 | -71% |
| Annual Wastewater Treatment Cost (¥) | 86400 | 0 | -100% |
