Small Cryogenic Air Separation Unit
Product Overview
Small Cryogenic Air Separation Unit (ASU) is pre-assembled, skid-mounted gas generation system designed to produce high-purity oxygen and nitrogen on-site. Using low-temperature cryogenic distillation, this compact unit eliminate liquid gas transport costs and deliver a stable, continuous gas supply for industrial plants, chemical facilities, and electronics manufacturing.
Parameter
|
Model |
Oxygen production (Nm³/h) |
Purity (%) |
Oxygen outlet pressure (KPa) |
nitrogen production (Nm³/h) |
Purity (ppmOo2) |
Nitrogen outlet pressure (KPa) |
Processing air volume (Nm³/h) |
Startup time (h) |
work cycle (m) |
|
KNOD-50/100 |
50 |
99.6 |
20 |
100 |
<10 |
15 |
300 |
12 |
6 |
|
KNOD-100/200 |
100 |
99.6 |
20 |
200 |
<10 |
15 |
610 |
12 |
6 |
|
KNOD-150/600 |
150 |
99.6 |
20 |
600 |
<10 |
15 |
920 |
12 |
6 |
|
KNOD-170/400 |
170 |
99.6 |
20 |
400 |
<10 |
15 |
1200 |
12 |
6 |
|
KNOD-350/800 |
350 |
99.6 |
20 |
800 |
<10 |
15 |
2300 |
16 |
12 |
|
KNOD-550/1200 |
550 |
99.6 |
20 |
1200 |
<10 |
15 |
3300 |
16 |
12 |
|
KNOD-1000/1000 |
1000 |
99.6 |
20 |
1000 |
<10 |
15 |
5700 |
24 |
12 |
Product Features
Pre-Assembled Skid Design: Cold box, expansion turbine, and purification units are pre-engineered and factory-tested, drastically reducing on-site civil work and installation time.
High Purity Output: Delivers continuous oxygen purity up to 99.6% and nitrogen purity up to 99.999% without secondary contamination.
Energy-Efficient Operation: Optimized main heat exchangers and high-efficiency turbines reduce power consumption per cubic meter of gas produced.
Fully Automated Control: Integrated Siemens PLC system with touchscreen interface provides auto-start, purity monitoring, automatic off-spec gas venting, and emergency shutdown.
Heavy-Duty Reliability: Industrial-grade air compressors and stainless steel distillation columns ensure continuous operation exceeding 8,000 hours annually.
Customization Options
Product Form:
Dual Gaseous Production (Oxygen & Nitrogen)
Liquid Extraction (Liquid Oxygen & Liquid Nitrogen)
Simultaneous Gas and Liquid Output
Pressure Systems:
Direct Pipeline Supply (0.2 to 3.0 MPa)
High-Pressure Cylinder Filling System (up to 20 MPa)
Safety & Power:
Standard or Explosion-Proof Configuration (ATEX / IECEx)
Local Power Grid Adaptation (380V / 415V / 440V, 50Hz / 60Hz)
Enclosure Type:
Open Modular Skid Frame (for indoor setup)
Containerized Weatherproof Enclosure (for outdoor setup)
Control System:
Local Siemens PLC Touchscreen Control
Remote Monitoring and DCS Integration Interface
Manufacturing & Quality Control
Code Compliance: Pressure vessel welding strictly follows ASME Boiler and Pressure Vessel Code and European standards.
Weld Inspection: 100% Radiographic and Ultrasonic testing on critical pressure-bearing welds.
Testing Standards: Hydrostatic pressure testing, helium leak detection, and thermal insulation validation for the cold box.
Factory Acceptance Test: Full PLC system logic verification, electrical wiring check, and mechanical alignment prior to shipment.
Factory Capacity & Strength
Proven Experience: 20+ years specializing in Air Separation & CO₂ Recovery Systems.
Massive Scale: 160-acre facility with 69,000m² standardized workshops & 500+ workers.
Smart Manufacturing: 300+ advanced machines, including laser cutters, robotic drills & automated welding.
Global Certifications: ASME, CE, ISO, and Class A2 Pressure Vessel licenses.
Worldwide Service: Products exported to 70+ countries with local support offices in Vietnam & Indonesia.
Packaging & Delivery
Export Protection: Equipment is wrapped with moisture-proof, weather-resistant film and packaged with desiccant protection.
Reinforced Frames: Heavy structural steel skids feature lifting lugs and forklift slots for safe container loading and handling.
Documentation: Ships with full P&ID diagrams, pressure vessel test certificates, weld logs, and operation manuals.
Company Introduction
CNCD is a manufacturer specializing in the production of pressure vessels, established in 2002 and has been in operation for over 20 years. Established in 2014, the Ministry of Foreign Trade has sold its products to over 70 countries.
FAQ
Q: What is the typical lead time for a small cryogenic air separation unit?
A: Standard modular units require 90 to 120 days for manufacturing, factory testing, and export packaging. Custom pressure configurations or dual-liquid systems may vary based on technical requirements.
Q: How does a cryogenic ASU compare to a PSA system?
A: Cryogenic units are ideal when high gas purity (99.6% oxygen or 99.999% nitrogen) or liquid gas is required. PSA systems are generally limited to lower purity levels (around 95% oxygen). Cryogenic units also offer lower unit power costs for continuous, large-volume production.
Q: Can the unit produce both oxygen and nitrogen at the same time?
A: Yes. The cryogenic distillation column can be engineered to generate high-purity oxygen and nitrogen simultaneously according to your site requirements.
Q: What foundation and utilities are required on site?
A: The buyer needs to prepare a level concrete foundation pad, main electric power connection, and cooling water supply. Civil work is minimal due to the skid-mounted design.
Q: Do you provide installation and commissioning support overseas?
A: Yes. We send experienced engineers to your site to supervise installation, perform system testing, complete commissioning, and train local staff.
Q: What details are needed to receive an accurate quote?
A: Please provide required gas output (oxygen or nitrogen), flow rate (Nm3/h), required outlet pressure (MPa), purity targets, local power voltage/frequency, and installation site location.
Q: How are maintenance and spare parts handled internationally?
A: Core electrical and control components use globally accessible standard brands like Siemens and Schneider. Replacement parts can be shipped globally via express air freight alongside 24/7 remote engineering support.
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