Super Purchasing for Praxair Air Separation Unit - Cryogenic type mini scale air separation plant industrial oxygen generator nitrogen generator argon generator – OuRui

Product Advantages

Our company is engaged as manufacturer and supplier of cryogenic air separation plant, PSA oxygen/nitrogen plant, high-vacuum cryogenic liquid tank & tanker and chemical .  It is also equipped with various equipments and machines in total of 230 sets, such as large-sized lift equipment, underwater plasma cutting machines and automatic welding machines, etc, which has the ability to produce air separation plant in capacity of 60000~120000Nm3/h.OuRui g won “famous trademark in Zhejiang province”, cryogenic liquid storage tank won “brand-name products”.  Our company specializes in cryogenics, chemical engineering machine, welding, NDT, machinery building and instrument & electric control system.Our company makes different but suitable plan for every different customer according to the condition of the air-composition, temperature & relative humidity, power supply and other parameters needed. Our design of plant uses low pressure, cryogenic technique and rectifying to gain pure oxygen, nitrogen and argon by liquefying air under the theory of turbo-expander chilling cycling. There are mainly three sizes of the air separation plants, which are large, middle and mini, to meet the different need of different customer.The series of vacuum powder tanks of our company are divided into vertical and horizontal. They are used for storing liquid oxygen, nitrogen, or argon and have the advantages of long life, compact design, less occupied space, central control and easy operation and maintenance. These tanks can be widely used in various industries, such as machine building, chemical engineering, synthetic fiber, medical, food-stuff, mining, electronic and military engineering, etc. Except for the series of products we have, we can also design and produce cryogenic tanks with different capacity and pressure. We can also make CO2 tanks, ISO tanks, LNG tanks, LPG tanks for customers as well as other relative products.We enjoy a tremendous popularity throughout the world with a vast experience of designing and manufacturing in the field of air separation. In recent years, our products have been exported to Vietnam, India, Pakistan, Turkey, Iran, Syria, Burma, Indonesia, Malaysia, Thailand, Korea, Egypt , Tanzania , Kenya, Bangladesh, Bolivia, Armenia and Mexico, etc.It is probable that the conditions of distribution of fossil and mineral resources are thoroughly different from country to country, district to district. However, the air resources are filling around everyone. Let the invisible air turn into visible brilliance. We are always here for you with our best service.

Application Fields

Oxygen, nitrogen, argon and other rare gas produced by air separation unit are widely used in steel, chemical

industry,refinery,glass, rubber, electronics, healthcare, food, metals, power generation and other industries.

Product Specification

1.Air Separation Unit with normal temperature molecular sieves purification, booster-turbo expander, low-pressure rectification column, and argon extraction system according to client’s requirement.

2.According to the product requirement, external compression,internal compression (air boost,nitrogen boost),self- pressurization and other processes can be offered.

3.Blocking structure design of ASU, quick installation on site.

4.Extra low pressure process of ASU which reduce air compressor exhaust pressure and operation cost.

5.Advanced argon extraction process and higher argon extraction rate.

Process flow

1. COMPRESSION OF ATMOSPHERIC AIR
Air is compressed at a very pressure of 5-7 bar (kg/cm2). Air can be compressed at such low pressure by trouble free rotary air compressor.

2. PRE COOLING SYSTEM
The second stage of the process uses a low pressure refrigerant for pre-cooling the processed air to temperature around 12 deg C before it enters the purifier.

3. PURIFICATION OF AIR BY PURIFIER
The air enters a purifier consisting of twin Molecular Sieve driers, working alternatively. The Molecular Sieves remove the Carbon dioxide & moisture from the processed air before the air enters Air Separation Unit.

4. COOLING OF AIR BY TURBO (EXPANDER)
The air has to be cooled to sub zero temperatures for liquefaction & the cryogenic refrigeration & the cooling is provided by highly efficient turbo expander, which cools the air to temperature almost below -165 to-170 deg C

5. SEPARATION IF LIQUID AIR INTO OXYGEN AND NITROGEN BY AIR SEPARATION COLUMN
Oil free, moisture free and Carbon Dioxide free air enters into low pressure fin type HEAT EXCHANGER where the air is cooled below sub zero temperatures by air expansion process in the turbo expander.
Air gets liquefied when it enters the air separation column & gets separated into oxygen & nitrogen by the process of rectification.
Oxygen is available at the outlet of the ASU at a purity of 99.6%. Nitrogen is also available t the outlet as a second product at purity of 99.9% upto 3ppm simultaneously without loss of oxygen product.

6. Compression of oxygen &filling of in cylinders
the final product in the form compressed Oxygen/Nitrogen goes to the high pressure oxygen cylinders at 150 bar or upto higher as required. This can be done by liquid oxygen pump is same models. We can use oil & water free compressor.

7.Argon Recovery Plants
Argon is recovered ABOVE 1000M3/Hour Oxygen Plants by a revolutionary technique employing full rectification without using the Hydrogen and De-Oxo unit thus saving further on power costs, operational costs and investment. This makes the Boschi design machines highly versatile and economical thanks to all the research and development done over the years.

Construction in Progress

Workshop