Hot Products
China Suppliers Liquid Nitrogen Plants - High Efficiency Modular Design from Reliable Factory
Liquefaction Efficiency
≥80%
High liquefied to feed ratio
Power Consumption
≤0.35 kWh/L
Includes N₂ generation & liquefaction
Outlet Temperature
≤-193 ℃
Ultra-low temperature output
Technical Specifications
| Parameter | Value | Remark |
|---|---|---|
| Liquefaction Feed Gas | High-purity N₂ (≥99.5%) | Directly from PSA unit |
| Refrigeration Method | Joule-Thomson expansion cycle | No external refrigerant |
| LN₂ Tank Volume | 5–100 m³ (customizable) | Vacuum multi-layer insulation |
| LN₂ Tank Working Pressure | ≤0.8 MPa | — |
| Daily Evaporation Rate | ≤0.3% | Per GB/T 18443 |
| LN₂ Outlet Temperature | ≤-193 ℃ | — |
| Cold Start-up Time | ≤4 h (first cold-down) | — |
| Liquefaction Efficiency | ≥80% (liquefied / feed) | — |
| Overall Power Consumption | ≤0.35 kWh/L (liquid N₂) | Includes N₂ gen. + liquefaction |
Frequently Asked Questions (FAQ)
1. What are the feed gas requirements for the liquefaction system?
The system requires high-purity Nitrogen (N₂) feed gas with a purity level of ≥99.5%. It is designed to connect directly to and receive gas from a PSA (Pressure Swing Adsorption) unit.
2. How does the refrigeration system work and does it require external refrigerants?
The system utilizes a Joule-Thomson expansion cycle for refrigeration. A key advantage of this method is that it requires no external refrigerant, simplifying operations and maintenance.
3. What is the capacity and insulation of the LN₂ storage tank?
The Liquid Nitrogen (LN₂) storage tank volume ranges from 5 to 100 m³ and is fully customizable. To minimize thermal loss, the tank features advanced vacuum multi-layer insulation.
4. What is the daily evaporation rate and working pressure of the storage tank?
The LN₂ storage tank has a working pressure of ≤0.8 MPa. Thanks to high-efficiency insulation, the daily evaporation rate is kept at ≤0.3%, complying with the GB/T 18443 standard.
5. How long does the cold start-up process take?
For the initial cold start-up (the first cool-down process), the system requires ≤4 hours to reach stable operating conditions and output liquid nitrogen at ≤-193 ℃.
6. What is the overall power consumption and efficiency of the system?
The system achieves a liquefaction efficiency of ≥80% (liquefied gas relative to feed gas). The overall power consumption is ≤0.35 kWh per liter of liquid nitrogen, which includes the energy required for both nitrogen generation and the liquefaction process.
