Coldbox Column

Coldbox ColumnProcess used in Oxygen Nitrogen plants -Medium PressureConstruction Materials for Air separation plants:The
materials used in an air separation plant are exposed to wide range of
temperatures, pressures, and purities during operation. Materials are
selected that are compatible with the expected condition including
normal operation, startup, shutdown, and process upsets.
For the oxygen system to operate safely, all parts of the
system should be reviewed for compatibility with oxygen under all
conditions they will encounter. The system is designed to prevent oxygen
combustion by:Selecting the optimum cryogenic grade material.Operating within the designed pressure, temperature, and flow limits; andObtaining proper cleanliness.BOSCHI 5 step process
PROCESS DESCRIPTION:
STEP 1 - Air Compression In the first
stage air is compressed at a low pressure of 5-7 bar (Gas plants) to 10
Bar (liquid plants). Air can be compressed at such low pressure by
trouble free rotary compressor (Screw / Centrifugal Type advanced
technology is employed in lieu of old bulky piston reciprocating
compressor).
STEP 2 - Air Pre-CoolingThe second stage
of the process uses a low pressure refrigerant (R-407A as per CE
regulations) for pre-cooling the processed air to temperature around 12
deg c before it enters the purifier.
STEP 3 - Purification of Air by PurifierThe
air enters a purifier consisting of twin Molecular Sieve driers,
working alternatively. The Molecular Sieves remove the Carbon dioxide
& moisture from the process air before the air enters Air Separation
Unit.
STEP 4 - Separation of Liquid Air into Oxygen and Nitrogen in Air Separation ColumnOil
free, moisture free and Carbon Dioxide free air enters into low
pressure plate fin type Heat exchanger where the air is cooled below sub
zero temperatures by air expansion process in the turbo expander. Due
to the excellent thermal efficiency we can achieve a temperature
difference delta t as low as 2 deg c at the warm end of these
exchangers.
The air has to be cooled to sub zero temperatures for
liquification & 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. Air gets liquefied when it
enters the air separation column & gets separated into oxygen &
nitrogen by the process of rectification.
Oxygen is available in gas or liquid form (as per requirement)
at the outlet of the ASU at a purity of 99.6%. Nitrogen is also
available at the outlet as a second product at purity of 99.99% upto
3ppm simultaneously without loss of oxygen product (or as specified).
STEP 5 - Product storage
For Gas: The final product in the form compressed
Oxygen/Nitrogen goes to the high pressure oxygen cylinders at 1 50 bar
or upto higher as required. OR, for pipeline supply or captive
consumption.                                                                                                                                                        
For Liquid: Liquid Oxygen / Nitrogen to fill in cryogenic liquid tanks.
Oxygen Filling Pump
Category 1 in medium pressure oxygen nitrogen plants-Cylinder Filling Oxygen Nitrogen Plants
Range: 20m3/hr to 1000m3/hrWith leakproof stainless steel column and skid mounted version for high purity medical and industrial oxygen.
Description: UB series oxygen/nitrogen plants are used for
filling high pressure Oxygen/nitrogen gas in cylinders/bottles by liquid
oxygen pump ( oil free & water free) for industrial & medical
applications .For filling liquid oxygen & liquid nitrogen additional
liquid tapping facility is available.SmallCapacity(20-50m3/hours) MediumCapacity(60-150)LargeCapacity(200- 1000)







































Name of the Models


UB - 20


UB - 30


UB - 50


UB - 80


UB - 100


UB - 150


UB - 200


UB - 300


UB - 400


UB - 500


UB -1000




Capacities (M3/Hr)


20


30


50


80


100


150


200


300


400


500


1000




No. of Cylinders in a Day(Oxygen/Nitrogen)


80


120


200


300


400


600


800


1200


1600


2000


4000




Filling of oxygen by liquid oxygen pumps, liquid nitrogen pump is optional.
We manufacture oxygen plants and nitrogen plants as per the
latest technology & design of the Company ING. L. & A., BOSCHI,
ITALY. This technology has been proven all over the world for its
working efficiency & trouble free operation. The AIR SEPARATION
COLUMN of BOSCHI has state of the art distillation trays, multipass
exchangers condenser to get a high yield of Oxygen by separation of
Liquid Air, which results in very low pressure & low power
consumption.
Salient Features  Leak Proof Stainless Steel Boschi Air Separation Column  Skid Mounted Version available  Oversize Molecular Sieve Dryer  Quick start for fast cooling  Very simple to operate  No raw material is required  Trouble free operation for years (German design)  Easy availability of spare parts  Low power consumption  Production of oxygen & nitrogen simultaneously without use of bulky gas holders.  Latest molecular sieve technology without recurring cost of chemicals  Latest BOSCHI-ITALY oxygen plant design  Very compact & sturdy oxygen and nitrogen plants  Low working pressure of oxygen gas plants  Very low maintenance for producing oxygen gas  Raw material -Free Atmosphere Air for producing oxygen/nitrogen gas/liquid  Latest molecular Sieve absorption without receiving cost of chemicals. Liquid Oxygen / Nitrogen pump with internal gas vaporizer for filling of oxygen gas in cylinders.  Hydraulic type Expansion Engine for oxygen/nitrogen plants  Highly efficient BOSCHI-TYPE trays for maximum recovery of oxygen  Highly efficient Heat-exchanger for recovery of waste cold energy to reduce operating cost.  The oxygen plant is supplied complete as per standard scope of supply. Main Equipment:
















SR. NO.


QTY


ITEM


DESCRIPTION




1.


One


SUCTION FILTER


High efficiency filter supplied with the compressor




2.


One


AIR COMPRESSOR OF OXYGEN/NITROGEN PLANTS


This
is 4-multistage heavy duty water cooled air compressor with fly wheel
inter cooler, foundation bolts, motor pulley, motor, v belt, guard and
slide rails and air filter. This is used to compress atmospheric air
complete with ABB Motor and Starter.




3.


One


PROCESS
SKIDOF OXYGEN/NITROGEN PLANTSAll the above equipments are neatly
mounted on skid /platform complete with interconnecting piping and ready
for installation of Oxygen Plant is optional.


This consists of the following items for Air Separation Plant1) After cooler with tank2) Nitrogen cooler with tank3) Moisture separator4) Chilling unit with freon unit5) Oil absorber filled with alumina6) Molecular sieve battery on skid (Zeochem, Switzerland)7) Defrost heater8) Gas/Air/water line as per standard layout on skid /platform prefabricated and ready for installation.9) Water pump.10) Inlet & outlet water lines11) Drain manifold complete with ball valves for draining moisture.




4.


One


Expansion Engine Of Oxygen/Nitrogen Plants


Complete
with motor/starter/ starter shall be of Siemens /ABB/ with hydraulic
valve control, bursting disc for safety, hydraulically operated high
efficient engine with ball type of valves stainless steel liner vertical
type of German design.




5


One


Air Separation Unit (COLD Box)Of Oxygen/Nitrogen Plants


(Air
separation column -cold box) consists of outlet steel casing, main heat
exchanger, liquifier, bottom column, top column, condenser, sub cooler,
liquid oxygen and nitrogen filter. Cooling pipe line, insulation
material, digital electronic temperature indicator and scanner, PT 100
sensor, DP gauge manometer, Expansion valve with long stem type with
pointer And index & wheel (Stainless Steel column argon welded to
meet European specifications can be supplied)




6.


Set


High Pressure Filling Manifold Of Oxygen/Nitrogen Plants


For
filling high-pressure Oxygen gas to Cylinders. It consists of main High
Pressure Isolation Valve and Pigtail connection with individual Valve
with Pressure Gauge and Safety Relief Valve.




7


One


Liquid Oxygen Pump Of Oxygen/Nitrogen Plants


Horizontal
single acting pump with Piston, Piston Rings, Safety Devices,
Non-Return Valves with Stainless Steel head for long life, Motor and
Starter with Pulley, V-Belts, Belt Guard, Inter Connecting Pipes with A.
S. U. Suitable for filling Oxygen.




8


One


Cooling Tower Of Oxygen/Nitrogen Plants


Induced
Draft-Rotary Sprinkler type with Aluminium Casting Fan, FRP Body with
suitable Electric Motor for maintaining the circulating water
temperature between the Hot well and Cold well for optimum performance
of the Plant. Complete in all respects.




9


One


Electricalpanelof Oxygen/ Nitrogen Plants


Electrical
Panel for supply of electricity to individual motors. It has a bank of
on/off switches and fuses. This enables the Operator to control all the
Motors from one point.




10


One


Water Softenerof Oxygen/Nitrogen Plants


Made
of HDPE having single mutiport valve for different plant valve for
different operations. Used to remove hardness of the water and to avoid
scaling in Air Compressor Cylinder jacket and water line.
Nacl/Regeneration. With min/max. working pressure in 2.0/4.0 kgs/cm2.
Complete in all respect





















Model


UB-20


UB-30


UB-50


UB-80


UB-100


UB-150


UB-200


UB-300


UB-400


UB-500



Capacity(M3/Hr)

20


30


50


80


100


150


200


300


400


500




No Of Cylinders/Day


80


120


200


300


400


600


800


1200


1600


2000




Area Required(Axb)M


6 x 8


6 x 10


8 x 12


12 x 15


14 x 15


14 x 15


14 x 15


15 x 16


15 x 18


18 x 20