Oxygen Nitrogen Production 1TPD KDON-40Y Oxygen Generator and Industrial and Medical Oxygen Gas Generating Equipment and Plant

This plant uses low-pressure turbine expansion refrigeration principle to make liquid oxygen and liquid nitrogen. The process description is as follows.

   Air is compressed to 0.7 MPa(G) by air compressor, and it goes to purifier after its condensed water is separated in water separator via pre-cooler. There are two adsorbers that work alternatively, i.e. one vessel is adsorbing the impurities while the other regenerates and blows off.

   Then the clean high-pressure air is divided into two streams after it enters main heat exchanger (upper) to exchange heat with oxygen, nitrogen and waste gas from main heat exchanger (lower). One stream enters the expander, and the other goes to lower column bottom via throttling valve after it enters main heat exchanger (lower) to exchange heat with oxygen, nitrogen and waste gas from rectification column again. Pure liquid nitrogen and oxygen-enriched liquid are produced at the top and bottom of lower column after the first distillation respectively. Oxygen enriched liquid is sent to middle part of upper column for second distillation after throttling. Then pure nitrogen is produced at the top of upper column and oxygen is produced at the bottom of it. The waste gas taken from middle part of upper column is used for regeneration and blow-off of purifier after sub-cooler and main heat exchanger recover coldness, and product oxygen and nitrogen are sent out of cold box for usage.

Main specifications

1     Main air compressor system      1set

       Type       Screw mini oil lubricated

       Medium        Air

       Total flow,m3/hr   13.8

       Inlet pressure/ temperature  MPa.A/deg C     0.098 /20

       Outlet pressure/ temperature MPa.G /deg C    0.7 /~40

       Location       indoor

       Main scope:

Compressor main body

Cooling system, include after cooler

Inter-stage piping

Lubrication system

Drive motor

Control system

Auxiliary equipment

Scope Battery limit: from inlet flange to outlet flange

       Features:

International leading brand with proved quality and reliability

Integrated skid mounted

2     Water separator    1set

3     Oil filters 1group(3pc)

4     Air pre-cooling system 1set

       Model    S(B)AYL-800/7

       Air flow,Nm3/hr   800

       Working pressure, MPa.G    0.7

       Air outlet temperature, °C   5~8

       Location indoor

       Main scope:

Integrated skid chiller with refrigeration compressor, condenser, vaporizer, water separator, and attachment

       Features:

5~8 deg C is good for molecular sieve purifier

5     Air purifier    1set

       Type      Vertical, manual shift

       Model    HXK-800/7

       Air flow,Nm3/hr   800

       Working pressure, MPa.G    0.7

       Inlet/outlet temperature,°C 8 /15

       Adsorbent     13X APG molecular sieve

       Impurities after purification        H20<1ppm

CO2<1ppm

       Adsorbing period of single vessel      8hours

       Reactivation gas flow,Nm3/hr    160

       Main scope:

Molecular sieve adsorber vessel (left and right),2pc

Electric heater, 1pc

Adsorbent(molecular sieve and alumina), sufficient

Valves,1lot

Internal piping

Scope battery limit: from inlet flange to outlet flange

       Features:

Two adsorbers for shift continuous working

Remove impurities(CnHm, CO2, H2O,etc.) to achieve good quality air which is able to process under cryogenic status

Working principle is temperature swing adsorption

6     Cold box       1set

       Model    FON-40Y/40Y

       Main scope:

HP column, sieve tray type

LP column, sieve tray type

Main heat exchanger, aluminum plate fin type(BAHX)

Subcooler, aluminum plate fin type(BAHX)

Condenser/vaporizer, aluminum plate fin type(BAHX)

Cold box shell

Internal piping and supports

Vent silencer

Waste liquid vaporizer

Heat insulation perlite

Scope Battery limit: from inlet flange to outlet flange

       Features:

Complete rectifying process

Columns and BAHX are made by cryogenic aluminum

Low pressure working process with lower energy consumption and higher safety

7     Turbine expander        2set(1 work, 1 backup)

       Bearing Air

       Medium        air

       Flow      500Nm3/hr

       Inlet pressure 0.71MPa.A

       Outlet pressure    0.13 MPa.A

       Main scope:

Main body

Filters

Scope Battery limit: from inlet flange to outlet flange

       Features:

High stable rotation speed, 50,000~90000 rpm during normal running

Skid mounted

Maintenance without taking perlite out

8     Instrumentation control system 1set

       Control way Manual

       Local instruments cabinet   1set

       Analyzers      H2O offline analyzer

CO2 analyzer

Product O2 analyzer

       Main scope:

Local instruments, include thermometer, pressure gauge, rotation speed meter

Field instruments

Local instruments panel 

Manual Control valve

Safety valve