Oxygen Plant We are among the renowned manufacturers
of oxygen plant that has gained much acclamation for operational fluency
and longevity. Air is expanded and liquefied through expansion and
cooling in an expansion engine and expansion valves in medium pressure
(40 Kgs/cm2 to 50 Kgs/cm2).
After the air get expanded and cooled in the expansion engine, it
enters the lower part of the distillation column through an expansion
valve. The air is often in the liquid form. The oxygen and nitrogen have
different boiling points. Because of the volatile nature of the nitrogen
gas, it is drawn out of the distillation column in vapor form while
oxygen is collected in the condenser. The liquid oxygen is pumped into
the cylinders at a pressure of 150 Kgs/cm2 approx.
- Oxygen Gas Plant - OPG
- Oxygen Liquid Plant - OPL
- Oxygen / Nitrogen Plant - OPG- LNO
The various types of Oxygen Plant components that are manufactured
by us are given under:
Air Compressor
This
four stroke type air compressor is supplied with appropriate Motors,
Electrical Panels, Motor Pulley, Belts, and Inter Stage Coolers. In this
compressor, the air is compressed at a pressure of about 40 to 55
kgs/cm2, which depends upon the plant condition and requirements. The
air compressor needs proper maintenance according to the manufactures
manual, which results in proper functioning and optimum output from the
equipment.
Cooling
Towers , Water Softeners And Water Pump
This
set of equipment is supplied as per compressor manufacturer's
instructions. The guidelines for the proper maintenance and handling of
this machinery is given in the form of a user manual. The user should
follow these instructions for the hassle free and efficient functioning
of the equipment.
Skid & MSB
After Cooler
It
is a cylindrical tank that is attached with the air coils. It is in this
tank where the air get cooled by the action of circulating water, after
passing from the compressor.
Cascade Cooler
This is an ellipse shaped tank that is equipped with air coils. These
coils are submerged in water to their half length. Dry nitrogen is
bubbled inside this water and get transformed into wet gas. When the
water vaporizes it becomes cool, and the air inside the pipe also get
cooled.
Moisture Separators
Two moisture separators are provided, out of which, the first one is
installed just after the the cooler while the second one is fitted after
the chilling tank. When the moisture condenses, the water is separated
through a drain on an hourly basis.
Chilling Tank and Chilling Unit
This tank is cylindrical in shape and fitted with air and refrigeration
coils. Water is cooled here by the combined action of chilling unit and
refrigeration coils. So air is further cooled in the chilling unit.
Oil Adsorber
Oil adsorber comprises alumina balls in abundance. In this equipment,
the vapor carried over by the compressor is removed. It is beneficial to
drain moisture from the bottom of the oil adsorber at regular time
intervals and to also change the alumina balls after a specified period.
Molecular Sieve Driers
It is a set of twin vessel driers, which are filled with molecular
sieves. The water vapor and carbon-di-oxide (CO2) gas present in the air
is absorbed by the molecular sieves, when the process air passes through
it. This filtration process continues for about 10 hours before the
molecular sieves became entirely saturated and required to be
regenerated with the help of a blow of hot air or nitrogen. Once the
molecular sieves are desaturated through the action of hot air or
nitrogen, the drier is again ready to be used.
Dust Filter
This unit filters the dry air with the help of a special material. It
prevents the dust from entering the air separation unit.
Defrost Heater
Although the molecular sieve filters almost all the water vapor and CO2
from the process air, still some water vapor and CO2 gas manages to
escape from the molecular sieve and enters the air separation unit. This
escaped vapor and gas get deposited in the tubes of the heat exchangers,
valves, and L.O. pump filters. Defrost heater is used for removing these
deposits from the tubes inside the air separation unit. The defrost
heater blows a jet of hot air inside the air separation unit, which
results in the melting and final removal of the unwanted deposits from
the unit.
Filling
Manifolds
Filling
manifolds are meant for filling the pressurized oxygen gas into the
cylinders at a pressure of about 165 kgs/cm2. They are provided with
safety valves, isolating valves, cylinder filling valves, pig tails with
cylinder connection, and pressure gauges.
Air Separation
Unit
Air
separation unit, as also discussed above, is a unit where the air get
stored after being filtered by the molecular sieves. The liquification
and fractional distillation processes take place inside the air
separation unit.
Expansion Engine
This
is a vertical single acting reciprocating type engine. It maintains the
temperature required for operating the plant. At the beginning of the
downward stroke, the high-pressure air enters through the inlet valve of
the piston and expands. During the upward stroke, the expanded air is
pushed outside through the outlet valve. Initially, the engine is
started with the help of an electric motor and thereafter it functions
itself with the generated air pressure, which results in cooling of air.
This cooling is more than the expansion valves. The temperature drops
inside the engine from 50°C to 70°C depending on air-pressure,
temperature, and inlet cam position
