Process Description of SANGHI Oxygen Plants
The free atmospheric air is sucked in by a multi-stage air compressor
through a filter and compressed to the working pressure. After each stage,
intermediate coolers and water separators are provided. The compressed air
then passes through the cascade cooler and then to the molecular sieve
battery where the moisture and carbon dioxide are removed from the process
air. It then passes through the exchanger No. 1 where it is cooled by the
out-going waste nitrogen and product oxygen. A part of this cold air then
flows through an expansion engine and the balance through the 2nd heat
exchanger. Both these streams of air then unite in the lower pressure column
where it partially liquefies an expansion valve R1, controls the ratio of
the two air streams. The liquid air (rich air) then passes through the
expansion valve R2 to the upper column, which is at a lower pressure than
the lower column. Similarly the liquid nitrogen (poor liquid) travels from
the lower column to the upper column through an expansion valve R3 where the
separation of oxygen and nitrogen occurs. Nitrogen being more volatile
passes out as a gas from the top of the column and this waste nitrogen flows
through both the heat exchangers cooling the in-coming air. Similarly
product oxygen is also passed through the two heat exchangers to cool the
in-coming air and then to the filling manifold via a liquid pump. If a small
amount of air is vented out from the upper column, higher purity nitrogen
can also be obtained from this plants. R4 Valve is provided in order to
fasten cooling during start-up.
ACCESSORIES FOR
OXYGEN PLANTS / NITROGEN PLANTS
Air Compressor #
Air Separation Unit #
Skid Mounted Air Compressor #
Water Softener Plants
Valves #
Expansion Engine #
Oxygen Liquid Pump / Nitrogen Liquid Pump #
Cooling Tower
Molecular Sieve Battery #
Analysers #
Vaporizers #
Gas Compressors #
Liquid Gas Cylinders
Air Compressor
Air Compressor - Type - Reciprocating, Horizontal, Balance opposed, water
jacketed, 3 / 4 / 5 stages, depending upon operation cycle. The air
compressor is complete with interstage coolers, separators, motor and
starter.
Air Separation Unit / Cold Box
Air Separation Unit / Cold Box consists of Distillation Column with Heat
Exchangers for heat transfer between the incoming air and the out going cold
Nitrogen and Oxygen. It is equipped with Expansion valves for controlling
the operation of the plants. Control panel for the cold box is provided with
the plants. Defrost heater for thawing plants is also provided on the cold
box. It is also equipped with liquid oxygen pump which is a single cylinder
equipment and delivers Bone-dry Oxygen upto pressure 165 Kg/Cm2. Cold box is
insulated with perlite for minimizing cold losses and reducing power
consumption.
Skid Mounted Air Compressor
SKID MOUNTED compressor can be offered on request.
Sanghi Water Softener Plants
Custom built water softener plants with flow Capacities ranging from 0.7m3
/ Hr to 12m3 / hr with an output per regeneration ranging from 8.1m3 to
20.3m3 max. working pressure 3.0kg / cm2.
Sanghi - Valves for cylinders
Oxygen / Nitrogen / Acetylene / Argon Cylinder valves with SS304 spindle &
Teflon. This cylinder valve is fixed to a gas cylinder by screwing & its
essential functions are as under :
Expansion Engine
Expansion Engine is a vertical reciprocating machine which can expand air
adiabatically from operating air pressure to 5 Kgm / cm2 to produce the
required cold for the Oxygen / Nitrogen plants. It greatly helps to reduce
power consumption.
Oxygen Liquid Pump / Nitrogen Liquid Pump
The liquid pump is a horizontal reciprocating pump. It can pump cryogenic
liquids such as Liquid Oxygen, Nitrogen and Argon upto 165 Kgm/Cm2 pressure
normally and 250 Kgm / Cm2 pressure in special cases. The pumps are simple
and requires least maintenance
Salient features of Oxygen Plants / Nitrogen Plants
- Leak Proof argon welded column
- Column available in Copper/Stainless Steel
- Very compact & sturdy oxygen plants and nitrogen plants
- Low working pressure 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 of Zeochem, Switzerland.
- Built in Liquid Oxygen / Nitrogen pump with internal gas
vaporizer for filling of bone dry and high purity Oxygen/Nitrogen
gas in cylinders.
- Hydraulic type Expansion Engine for Oxygen plants / Nitrogen
plants
- Highly efficient Heat-exchanger for recovery of waste cold energy
to reduce operating cost.
- The oxygen plants is supplied complete as per standard scope of
supply.
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Sanghi-Cooling Tower
Induced draft Rotary sprinklers in FRP casings with electric motor 3 HP /
960RPM with or without basin in different capacities from 500 LPM to 1000
LPM.
Molecular Sieve Battery
This is a battery of two vessels filled with Molecular Sieve type 13-X to
absorb Carbon Dioxide and Moisture from process air. One vessel will be
online and the other will be regenerated by Dry Nitrogen. Regeneration
Heater is also provided.
Analysers
We offer online, digital, electronic analyzers with mounting & portable
type for monitoring purities of Oxygen, Nitrogen, Argon and other gases.
This indicator is a convenient and handy instrument for field applications
where a quick, easy and accurate measurement of oxygen is required. The
sensor being located within the instrument requires the gas sample to be
delivered to inlet port. This instrument is ideal where the sample is
available at a slight positive pressure.
Vaporizers
High Pressure Atmospheric Vaporizer for LOX/LIN Design. Construction of
Tubes : SS/Copper Construction of Frame : Aluminium/Steel
Operating Pressure & Design Pressure will vary depending upon the users
requirement. However, the Vaporizers from operating pressure of 8 Kg/cm2g to
300 Kg/cm2g are available.
The Vaporizers are used for converting the liquid form of product (i.e.
O2,N2,Argon) to the gaseous form. This transformed gas can be supplied in
pipe line through Low Pressure Vaporizer or can be filled in cylinders
through High Pressure Vaporizers
Gas Compressors
This is a reciprocating machine, with crank gear, piston rod, piston,
cylinders. The machine is used for building up pressure of Oxygen, Nitrogen,
Nitrous Oxide gas for filling the gas into Cylinders. These are available in
various capacities and consist of following :
Control Panel consisting of Pressure Gauge for All the Stages and Oil
Pressure, and manual unloading Valves, Gas Coolers after all the three
stages, Safety Valves for all the three stages, N.R.V. at Delivery, Belt
Guard, Tool Box, Flywheel, Fiber Buckets for all the three stages, Motor
Pulley.
Liquid Gas Cylinders
LGC's are small liquid cylinders with in built pressure building &
evaporating coil to allow both gas as well as liquid withdrawal. It can be
transported to & from customers site with liquid filled in just like
high pressure gas cylinder. This facilitates larger quantity of product
transfer in liquid form than in Gaseous form. It is ideal for Liquid N2,
Oxygen, Argon CO2 & N2O.
Gas Cylinders
We offer gas cylinders for various gases - Oxygen, Nitrogen, Argon, Carbon
Di-Oxide, Hydrogen, Helium etc. with working pressure from 150 bar to 250
bar.
