ACETYLE GENERATOR
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| Acetylene Generator |
The Better Deal Machine Acetylene Generator is of an
advanced design, incorporating several features not ordinary
found in other generators. The BDM Acetylene generator
is a fully automatic plant.
Pneumatically controlled valves and highly sensitive sensors,
integral with the temperature control instruments, perform
all operations. These in turn open the water inlet valve
or residue drain valve etc. Two hydraulic pumps help to
open and close the supply of calcium carbide, which is
fed into the generator by screwfeed conveyors. The screw
feed mechanism and the agitators are operated by flameproof
motors and fittings. The entire operation is perfectly
synchronized to give maximum efficiency and simplicity
in operation. Any failure, whether it is of power supply,
water or air is signaled visually and also audibly when
an alarm bell rings to alert the operator.
Only flame proof lights & electrical fittings according
to IS2148-68 (group II) or BSS -229 may be used in an
acetylene plant building. Acetylene cylinders must be
of specification IS: 7312:1974 or ICC:8.
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| Safety Sensors |
TEMPERATURE CONTROL
The BDM Acetylene Generator can be set to operate at
any given temperature, regardless of the size of carbide
used or temperature of the cooling water, A sensitive
sensor actuates a pneumatic control that adds water into
the generator tank when the temperature exceeds the set
limit, thus maintaining a given standard temperature.
This helps in complete utilization of carbide, which is
a very expensive raw material.
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| Air Compressor |
HIGH PRESSURE CONTROL
If all the gas generated cannot be drawn in by the compressor
and passed on the filling manifold, either due to low
capacity of the compressor or fast generation, gas pressure
will gradually build in the generator. When the gas pressure
reaches a predetermined level (about 0.5kg/cm²) carbide
will be cut off automatically and further generation of
gas is stopped.
There is no expensive gas holder with the BDM Acetylene
Generator. This item alone will reduce the investment
on such a plant. Further, as the gas generated is always
at a positive pressure, the pumping cost is also reduced.
Since the generator is constantly at a positive pressure,
(once the plant has been purged with Nitrogen) no air
can enter the system, and it is this feature which makes
the "BDM" Plant inherently very safe.
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| Water Level Control |
WATER LEVEL CONTROL
If excessive water enters the generator to cool it and
the water level goes above the high level mark, the water-level
control instrument will immediately discharge the excessive
water thus maintaining the water between the acceptable
high and low level marks.
NO LOSS CARBIDE CHARGE
No gass is lost or wasted while charging the carbide
because that section is completely sealed off from the
generator by a high pressure hydraulically operated valve.
All the above controls are automatic and require no attention
from the operator. There is a further safety device, in
terms of an alarm bell, which will ring continuously till
the fault is corrected.
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| Stainless Steel Condenser |
CONDENSER
The Acetylene gas leaving the generator is hot and carriers
with it some water vapour and other impurities. The condenser
will cool the gas, thereby condensing the excessive moisture
in preparation for its subsequent removal. The condenser
is of ample proportion to suit local conditions and ensures
complete cooling, provided that sufficient water supply
is maintained.
LOW PRESSURE DRIER
The drier is charged with calcium chloride. The absorbs
the moisture in the gas. In case a certain amount of moisture
is necessary to enable the chemical purifier to function
effectively, a by-pass is provided to allow part or whole
of the gas to be directly admitted into the chemical purifier.
CHEMICAL PURIFIER
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| Chemical Purifier |
This consists of two layers of regenerative chemicals,
which remove additional impurities. The purifying agent
may be reactivated for re-use by the atmosphere air. For
continuous operation one extra charge of chemicals can
be kept in open wooden trolley.
WATER SCRUBBER
The equipment is installed between the chemical purifier
and the high-pressure compressor, which helps to remove
additional impurities from the gas if any.
ACETYLENE COMPOSER
For filling of the cylinders an I.R. make reciprocating,
oil lubricated, multi-stage, Water submerged compressor
with intercoolers, safety relief valve for each stage,
driven by a 15 H.P. Flame Proof Motor confirming to IS:2148-68
(Gr.II-B) is provided.
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| High Pressure Drier |
HIGH PRESSURE DRIER
This consists of a battery of three high-pressure vessels.
The first is filled with metal filler, while the second
and third are filled with anhydrous calcium chloride.
It is very important that the high pressure drier is fully
filled up with Calcium Chloride, as any voids in high-pressure
area are against the required safety.
FILING MANIFOLD
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Filling Manifold
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This consists of a battery of 60 filling connections
to connect to the gas cylinders. Non-return valves are
extremely important for the safe operation of the plant
and should be periodically examined. The manifold should
also be periodically cleaned to remove rust and scales,
(iron rust rushing though the pipeline at high speed could
generate a spark and cause fire). The cylinders filling
pig tails (flexible hose pipes) should also be periodically
cleaned to ensure that they: do not burst during filling
operation, (if they do burst, a fire would ensure due
to sudden discharge of Acetylene).
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Instrumental Air Compressor |
INSTRUMENTAL AIR COMPRESSOR
A flameproof motor with a buffer tank drives the instrument
air compressor.
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