Small Size Air Separation Unit

Your Professional Small Size Air Separation Unit Supplier

Suzhou Doer Gas ＆Chemical Equipment Co., Ltd. Was established in 2009 and is located in Xiangcheng District, Suzhou. It is a high-tech enterprise integrating R&D, design, manufacture, complete engineering, industrial services, and investment operations. The company has a registered capital of 100 million yuan, has 6 subsidiaries, two production bases with a total area of about 135,000 square meters, and a total number more than 400 employees.

Our Product
Large Scale Atmospheric Cryogenic Storage Tank, Vacuum Cryogenic Liquid Storage, Cryogenic Liquid Transportation Equipment, LNG Marine Equipment, Turn-key project.

Production Market
Suzhou Doer Gas ＆ Chemical Equipment Co., Ltd. is a comprehensive solution provider and service provider that integrates low-temperature technology research and development, design, equipment manufacturing, engineering general contracting, industrial services, and investment and operation.

Production Equipment
Electric single beam crane, bridge crane, Laser cutting machine, Inverter DC arc welding machine.

Full Liquid ASU
Function: Product required liquid oxygen, nitrogen and argon
Technology: Air direct expansion, medium pressure cycle single expansion, medium pressure cycle single expansion + air chiller...
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Small Size Air Separation Unit

Air separation units (ASU) produce high purity oxygen, nitrogen, argon and rare gases through a combination of adsorption purification, cryogenic distillation and internal compression of high pressure products.

Air Separation that meet the highest quality standards for the liquid or gaseous production of technical gases using the cryogenic process with tray or packing technology.

It has the series of ASP and liquefying and liquid plants with the process based on molecular sieve adsorbing at normal temperature and booster expansion, structural packing tower is applied and argon is extracted through full rectification without hydrogen and internal process technology.

SinoCleansky innovative small ASU, which was designed with low-pressure process, eliminated the disadvantage of high power consumption in conventional designs.

Product Parameters

Products	Capacity (Nm3/h)	Purity (vol)	Pressure out of cold box MPa (G)	Temp. out of cold box (℃)	Remark
LOX	1000-30000	≥99.6%O₂	～0.15	Saturated or supercooled
HP-LOX	According to requirment	≥99.999%O₂ £ 2ppmAr £ 5ppmN₂	～0.15	Saturated or supercooled
LIN	1000-30000	≤10ppmO₂	～0.4	Saturated or supercooled	Can reach electronic grade
LAr	50-1200	≤1.5PPmO₂ ≤4PPmN₂	～0.15	Saturated or supercooled

Note: The liquid product pressure is measured at 0 meters elevation of the cold box, considering the static pressure of the liquid column.

Working Principle

The basic principle of cryogenic air separation unit is to liquefy the air, and separate the air components by cryogenic distillation according to the different boiling points of oxygen and nitrogen (argon).

No	MAIN PART	FUNCTION
1	Air Compression System	After the raw air is filtered, it is compressed to ～0.5 MPa by the air compressor.
2	Circulating booster system	Compressed The circulating air or nitrogen to 2.8 ~ 3.0 MPa to provide a medium pressure expansion gas source for the ASU.
3	Pre-cooling System	Reduce the temperature of compressed air to about 8～10 ° C
4	Air Purification System	Removing the remained moisture, carbon dioxide and hydrocarbons of compressed air in the molecular sieve adsorber.
5	Distillation System (Cold Box)	Distillation system is the key to realize air separation. It mainly uses the boiling point difference of oxygen and nitrogen (argon), and uses the process of partial vaporization and partial condensation many times to make the low boiling point components continuously evaporate from the liquid phase to the gas phase, and at the same time, the high boiling point is continuously condensed from the gas phase to the liquid phase, and finally realizes the separation of oxygen and nitrogen (argon).
6	Turbo Expander System	The compressed gas expands in the turbine expander, to provides the cooling capacity required by the device.
7	Storage and vaporization System	Store the separated liquid products, such as liquid oxygen, liquid nitrogen, and liquid argon.
8	Instrument Control System	The entire air separation unit is equipped with a central control system to monitor, control and interlock the process parameters of the entire air separation unit (air compressor, circulating booster, pre-cooling system, purification system, turbine expander, distillation system, liquid storage system). The own control system for machine unit communicates with the air separation unit control system by Modbus, so that its operation status can be monitored at the operating station in the central control room.
9	Electrical Control System	The electrical control system provides power for the electrical equipment of the air separation unit. A reasonable and optimized power supply and distribution system design can not only reduce investment and loss, but also be the cornerstone and guarantee for the reliable operation of the air separation unit.

Advantage

Simple installation and maintenance thanks to modular design and construction.

Fully automated system for simple and reliable operation.

Guaranteed availability of high-purity industrial gases.

Guaranteed by the availability of product in -phase to be stored for use during any maintenance operations.

Low energy consumption.

Short time delivery.

Purchasing Guide

If you need a set of air separation plant, please tell us your specific requirements and environmental parameters, so that we can make professional quotations accordingly.Please advise:
Altitude, temperatures (highest temperature in summer and lowest temperature in winter), humidity, earthquake intensity and wind speed.
Voltage including high voltage and low voltage.
Your requirements on the output and purity of liquid oxygen or oxygen gas, as indicated below:

Description	Output (TPD)	Purity	Ex-Cold Box Pressure (Barg)
Gaseous Oxygen		%
Liquid Oxygen		%
Gaseous Nitrogen		≤ ppm O2
Liquid Nitrogen		≤ ppm O2
Liquid Argon		≤ ppm O2
		≤ ppm N2

Types of Small Size Air Separation Unit

A small air separation plant is designed to extract oxygen, nitrogen, and argon from the atmosphere. There are different types of small air separation plants based on various features and components.

Portable air separation plants

A portable air separation plant is a small, moveable unit designed to extract gases from the atmosphere. The entire system is usually housed within a container or on a trailer. As a result, it is easy for people to transport the unit to different locations. This type of plant is suitable for remote areas where people cannot access centralized gas supply systems.

Modular air separation plants

A modular air separation plant comes as self-contained units. Each of the units carries out a specific function in the gas separation process. These functional units include compression, cooling, distillation, and product recovery modules, among others. Modular air separation plants offer flexibility in terms of scaling. Business owners can easily add or remove modules to meet their changing gas production needs.

Certificate

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FAQ

Q: What are the typical sizes of small air separation plants?

A: Small air separation plants are typically measured by their ability to produce specific quantities of gases, often expressed in cubic meters or liters. For example, a small air separation plant might produce 500-1,000 cubic meters of nitrogen per hour.

Q: What is the difference between cryogenic and non-cryogenic air separation methods?

A: Cryogenic air separation plants are preferred for large-scale production. Non-cryogenic methods, like PSA, VSA, or membrane gas separation, are suitable for smaller volumes or specific applications where cryogenic separation is not feasible or economical.

Q: How energy-efficient are small air separation plants?

A: The energy efficiency of small air separation plants varies by design and technology. It's typically indicated by energy consumption per unit of gas produced. Most small air separation plants optimize energy use and recover gases to reduce environmental impact.

Q: What industries use small air separation plants?

A: Industries that commonly use small air separation plants include chemical manufacturing, food and beverage (for nitrogen flushing and preservation), metal fabrication (for oxy-fuel welding and cutting), healthcare (for medical oxygen supply), and water treatment (for preventing algae and purification).

We're well-known as one of the leading small size air separation unit manufacturers in China. If you're going to wholesale high quality small size air separation unit made in China, welcome to get quotation from our factory.