CO2 Compressor from China Suppliers - High-Quality Factory Solutions for Urea Synthesis and Carbon Capture
Advantages of Carbon Dioxide Diaphragm Compressor
01
Absolutely Oil-Free and 100% Purity Retention
The core of a diaphragm compressor lies in its use of a metal diaphragm to completely physically isolate the compressed gas from the hydraulic oil system. The cylinder requires no lubrication. This means that during the entire compression process, carbon dioxide gas does not come into contact with any grease or oil mist, fundamentally eliminating oil contamination. For food-grade CO₂, electronic-grade CO₂, or CO₂ used in high-end chemical synthesis, this characteristic ensures extremely high cleanliness and chemical purity of the product gas, fully meeting the most stringent application standards.
02
Superior Static Sealing and Intrinsic Safety
The carbon dioxide gas is completely sealed within the "diaphragm cavity" formed by the diaphragm and cylinder head. This is a static sealing structure that theoretically achieves zero leakage. This not only effectively prevents the loss of valuable or hazardous gases, but also completely eliminates the asphyxiation safety risk caused by CO₂ accumulation in low-lying areas due to leakage. Simultaneously, this structure prevents potentially corrosive moist CO₂ from eroding the transmission components, enhancing the operational reliability of the equipment under harsh conditions.
Key Design Points for Carbon Dioxide Diaphragm Compressor
01
Strict Material Selection for Corrosion Protection
Since carbon dioxide forms carbonic acid when co-existing with moisture, which is corrosive to ordinary carbon steel, all flow-wetted components in contact with CO₂—including the cylinder head, diaphragm, gas valves, and piping—must be manufactured from corrosion-resistant materials. Austenitic stainless steels (such as 304, 316L) are typically selected, and strict degreasing, cleaning, and passivation treatments are performed after manufacturing to ensure lasting corrosion resistance and gas purity.
02
Precise Temperature & Pressure Control
The critical temperature of carbon dioxide is 31.03 °C. During compression, if cooling is insufficient and the gas temperature falls below this critical value while the pressure is high enough, a phase change to liquid is highly likely. Liquid CO₂ inside the compressor can cause a fatal "liquid hammer" phenomenon, damaging the diaphragm and cylinder head. The design must involve carefully calculating and controlling the compression ratio at each stage, and configuring high-efficiency interstage coolers (water-cooled or air-cooled) to ensure that the discharge temperature at each stage is effectively lowered. This strictly confines the operating points of the entire compression path to the gaseous region of CO₂, avoiding the risk of liquefaction.
03
Enhanced Safety Monitoring & Protection
Given the large coefficient of expansion of CO₂ under high-pressure storage (the pressure of a full cylinder can surge by 314 – 834 kPa for every 1 °C rise in temperature), the system must integrate multiple protections. Key design elements include: setting up accurate and reliable safety valves at each stage to prevent overpressure; equipping a diaphragm rupture detection and alarm device that can immediately alarm and shut down the compressor upon diaphragm failure to prevent gas-oil mixing; and installing gas concentration monitors in areas where CO₂ may accumulate, linked to the ventilation system. The control system (PLC) should integrate real-time monitoring and interlock shutdown functions for parameters such as pressure, temperature, and diaphragm status.
Certificates
Model Selection
| ModelG70Z/G95Z/G110Z/G130Z | Piston Stroke70mm~130mm | Maximum Piston Force10KN~30KN |
| Maximum Discharge Pressure70Mpa | Flow Range1~500Nm³/h | Motor Power2.2KW~30KW |
| Crankshaft Speed420rpm | Cooling MethodWater Cooled/Air Cooled | |
| ModelG70V/G95V/G130V | Piston Stroke70mm~130mm | Maximum Piston Force10KN~30KN |
| Maximum Discharge Pressure50Mpa | Flow Range1~200Nm³/h | Motor Power2.2KW~30KW |
| Crankshaft Speed420rpm | Cooling MethodWater-cooled / Air-cooled | |
| ModelG110L/G130L | Piston Stroke110mm~130mm | Maximum Piston Force20KN~40KN |
| Maximum Discharge Pressure100Mpa | Flow Range10~1000Nm³/h | Motor Power7.5KW~90KW |
| Crankshaft Speed420rpm | Cooling MethodWater-cooled / Air-cooled | |
| ModelG110D/G130D/G150D/G180D/G182D/G210D | Piston Stroke110mm~210mm | Maximum Piston Force20KN~160KN |
| Maximum Discharge Pressure100Mpa | Flow Range30~2000Nm³/h | Motor Power22KW~200KW |
| Crankshaft Speed420rpm | Cooling MethodWater-cooled / Air-cooled | |
G
Diaphragm type compressor
Z
Piston stroke 70mm
52
Flow (Nm³/h)
40
Inlet pressure (barg)
56
Outlet pressure (barg)
| No. | Model | Cooling water | Flow | Inlet pressure | Outlet pressure | Dimensions L×W×H | Weight | Motor Power |
|---|---|---|---|---|---|---|---|---|
| (L/h) | (Nm³/h) | (MPa) | (MPa) | (≈mm) | (≈kg) | (kW) | ||
| 1 | GZ-52/40-56 | 500 | 52 | 4 | 5.6 | 1200×700×1100 | 450 | 3 |
| 2 | GZ-15/10-12 | 500 | 15 | 1 | 1.2 | 1200×700×1100 | 500 | 3 |
| 3 | GZ-20/7-30 | 500 | 20 | 0.7 | 3 | 1200×760×1100 | 750 | 4 |
| 4 | GV-60/8-60 | 1000 | 60 | 0.8 | 6 | 2600×1800×1700 | 3000 | 11 |
| 5 | GV-500/150-200 | 1500 | 500 | 15 | 20 | 2600×1800×1700 | 3000 | 18.5 |
| 6 | GV-160/（6-10）-75 | 2000 | 160 | 0.6-1 | 7.5 | 2600×1800×1700 | 3000 | 22 |
| 7 | GL-20/10-150 | 1500 | 20 | 1 | 15 | 2200×1200×1300 | 3000 | 15 |
| 8 | GL-25/5-150 | 1500 | 25 | 0.5 | 15 | 2200×1200×1300 | 3000 | 15 |
| 9 | GL-45/5-150 | 2000 | 45 | 0.5 | 15 | 2600×1300×1300 | 3000 | 18.5 |
| 10 | GD-40/150 | 4000 | 40 | Atmospheric | 15 | 3500×2000×1700 | 4000 | 37 |
| 11 | GD-300/50-200 | 4000 | 300 | 5 | 20 | 3600×2300×1800 | 4000 | 45 |
| 12 | GD-900/10-140 | 16000 | 900 | 1 | 14 | 4500×4000×2200 | 16000 | 200 |
The equipment size and weight are for reference only, and the final design shall prevail.
Case Study
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United States
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Frequently Asked Questions (FAQ)
Q:
What makes a diaphragm compressor ideal for carbon dioxide (CO2)?
A diaphragm compressor uses a metal diaphragm to isolate the gas completely from the hydraulic oil system. This ensures a 100% oil-free compression process, preserving the absolute purity of the CO2, which is critical for food, electronic, and pharmaceutical-grade applications.
Q:
How does the compressor prevent gas leakage?
It utilizes a static sealing structure where the CO2 is entirely contained within the diaphragm cavity. Unlike dynamic seals, this design theoretically achieves zero leakage, preventing gas loss and safety hazards such as localized CO2 asphyxiation.
Q:
Why is moisture control and material selection critical for CO2 compressors?
CO2 forms corrosive carbonic acid when mixed with moisture. To prevent corrosion, all flow-wetted components (valves, diaphragms, cylinder heads) are manufactured from high-grade stainless steel (such as 304 or 316L) and undergo strict passivation treatments.
Q:
How does the system prevent CO2 liquefaction during compression?
Since CO2 liquefies easily below 31.03°C under high pressure, the compressor is designed with precise stage ratios and high-efficiency interstage coolers. This keeps the operating points within the gaseous phase region, eliminating the risk of destructive "liquid hammer" events.
Q:
What safety features are integrated into the compressor system?
The system includes stage safety valves for overpressure protection, a diaphragm rupture detection system that triggers automatic shutdown if a diaphragm fails, and PLC-controlled real-time monitoring of pressure, temperature, and gas concentration levels.