Cryogenic Air Separation Plant nitrogen.jpg

Cryogenic Air Separation Plant for High-Purity N₂, O₂, and Argon | China Suppliers & Factory

• Our cryogenic distillation technology expertly separates air into high-purity nitrogen (N₂), oxygen (O₂), and liquid argon using precise boiling point differences
• Offering N₂ capacity ranging from 100 to 50,000 Nm³/h, our units guarantee N₂ purity of ≤3ppm O₂ (99.9997%) and O₂ purity of ≥99.6%
• Equipped with a high-efficiency turbo expander and main heat exchanger, our systems reduce overall energy consumption by 10% to 20% compared to conventional models
• Fully automated with PLC/DCS control, our units provide flexible load regulation of 30% to 110%, accommodating fluctuations in demand
• We provide simultaneous gaseous and liquid product output (LIN, LOX, LAR) with cryogenic liquid storage tanks for enhanced efficiency
• Designed for durability, our plants feature a design life of ≥20 years, with a continuous operation cycle of ≥2 years and minimal maintenance costs
• With a modular design for easy installation and a small footprint, our systems are ideal for on-site centralized gas supply, making our factory a leading choice among suppliers in China.

Parameter	Specification
Technology	Pressure Swing Adsorption (PSA)
Adsorbent	Carbon Molecular Sieve (CMS)
Product Gas	Nitrogen (N₂)
Purity	95% - 99.999% (adjustable)
Capacity	1 - 3000 Nm³/h (single unit)
Working Pressure	0.6 - 0.95 MPa
Outlet Pressure	0.1 - 0.6 MPa (adjustable)
Dew Point	≤ -40℃
Control	Fully automatic PLC with touchscreen HMI

Nitrogen is produced within 10-15 minutes

Inquiry Now Download PDF

Product Details

I. Small Cryogenic Air Separation Unit — Technical Specifications

Model	KDON-50/50	KDON-80/160	KDON-180/300	KDON-260/500	KDON-350/700	KDON-550/1000
O₂ Output Nm³/h	50	80	180	260	350	550
O₂ Purity %O₂	≥99.6	≥99.6	≥99.6	≥99.6	≥99.6	≥99.6
N₂ Output Nm³/h	50	160	300	500	700	1000
N₂ Purity ppm O₂	≤10	≤10	≤10	≤10	≤10	≤10
Unit Energy KWh/Nm³O₂	≤1.3	<0.85	≤0.68	≤0.65	≤0.65	≤0.65
Footprint m²	145	150	160	180	250	420

II. High-Purity Nitrogen (Cryogenic) Unit — Technical Specifications

Model	KDN-200	KDN-300	KDN-400	KDN-700	KDN-1000	KDN-1600
N₂ Output Nm³/h	200	300	400	700	1000	1600
N₂ Purity ppm O₂	≤3	≤3	≤3	≤3	≤3	≤3
LN₂ Output L/h	/	10	10	20	40	60
N₂ Pressure MPa	0.34~1	0.34~1	0.34~1	0.34~1	0.34~1	0.34~1
Footprint m²	95	150	220	260	300	320

III. Liquid Cryogenic / Liquefaction Unit — Technical Specifications

Model	KDO-180y	KDO-250y	KDO-400y	KDON-1200y/300y	KDONAr-1300y/200y/40y
LO₂ Output Nm³/h	180	400	400	1200	1300
LO₂ Purity %	≥99.6	≥99.6	≥99.6	≥99.6	≥99.6
LO₂ Pressure MPa	0.2	0.2	0.2	0.2	0.2
LN₂ Output Nm³/h	—	—	—	300	200
LN₂ Purity PPm O₂	—	—	—	≤5	≤5
LN₂ Pressure MPa	—	—	—	0.5	0.5
LAr Output Nm³/h	—	—	—	—	40
LAr Purity	—	—	—	—	≤1.5ppm O₂+4ppm N₂
LAr Pressure MPa	—	—	—	—	0.2
Footprint m²	250	300	350	850	4000

IV. Physical Properties of Air Components (Table 1) — Composition

Component	Symbol	Volume Fraction %	Weight Fraction %
Nitrogen	N₂	78.084	75.5
Oxygen	O₂	20.95	23.1
Argon	Ar	0.932	1.29
Carbon Dioxide	CO₂	0.035	0.05
Helium	He	0.00046	0.00006
Neon	Ne	0.0016	0.0011
Krypton	Kr	0.00011	0.00032
Xenon	Xe	0.000008	0.00004

V. Physical Properties of Air Components (Table 2) — Physical Data

Component	Symbol	Boiling Pt. ℃	Melting Pt. ℃	Gas Density Kg/m³	Liquid Density Kg/L	Critical Temp. ℃	Critical Pressure MPa(G)
Nitrogen	N₂	-195.8	-209.86	1.2506	0.81	-147	3.45
Oxygen	O₂	-183	-218.4	1.4289	1.14	-119	5.13
Argon	Ar	-185.7	-189.2	1.784	1.4	-122	4.959
Helium	He	-268.9	-272.55	0.18	0.125	-267.7	0.2335
Neon	Ne	-246.1	-248.6	0.748	1.204	-228.7	2.813
Krypton	Kr	-153.2	-157.2	1.735	2.155	-63.7	5.6
Xenon	Xe	-108	-111.8	1.664	3.52	16.6	6.01

Frequently Asked Questions (FAQ)

Q1: What oxygen purity can be achieved with the Small Cryogenic Air Separation Units?

All standard models in the KDON series deliver high-purity oxygen at ≥99.6% O₂, suitable for various industrial and technical applications.

Q2: What is the nitrogen purity level for the High-Purity Nitrogen units?

The KDN series high-purity nitrogen units consistently produce nitrogen with residual oxygen levels as low as ≤3 ppm O₂ across all capacities.

Q3: Can cryogenic liquefaction units extract liquid argon (LAr)?

Yes, advanced models such as the KDONAr-1300y/200y/40y are engineered to produce up to 40 Nm³/h of Liquid Argon with high purity (≤1.5 ppm O₂ + 4 ppm N₂) alongside liquid oxygen and nitrogen.

Q4: How does plant capacity affect specific unit energy consumption?

Higher capacity systems offer greater energy efficiency. For instance, specific power consumption drops from ≤1.3 KWh/Nm³O₂ on the 50 Nm³/h model to ≤0.65 KWh/Nm³O₂ on systems rated at 260 Nm³/h and higher.

Q5: What are the fundamental boiling points for cryogenic air separation?

Fractional distillation relies on differing boiling points under atmospheric pressure: Nitrogen boils at -195.8℃, Argon at -185.7℃, and Oxygen at -183.0℃.

Q6: What footprint is required to install high-purity nitrogen generators?

Footprint requirements scale with unit capacity, requiring approximately 95 m² for the KDN-200 model up to 320 m² for the KDN-1600 model.