(even technical grade) is melted in a melter. The molten ammonium
nitrate flows into a combustion pot where ammonium nitrate is decomposed
according to the following reaction:
NH4NO3 ------------ N2O + 2H2O
reaction is ticklish and has to be controlled properly. If temperature
of ammonium nitrate is allowed to go beyond a certain point then
we do not yet yield. In our plant we almost get yield of reaction
equal to 95% or even more. In practice, however, with N2O
some other impurities are also obtained as products of combustion.
There is some undecomposed ammonium nitrate, with its fumes. These
are recovery in the primary scrubber. The steam in the hot gas is
condensed in the first water scrubber and the entrained moisture
and traces of ammonium nitrate get separated in the mist separator.
The residual traces of ammonium nitrate, carbon dioxide and other
oxides of nitrogen are removed in the caustic scrubbery.
Nitrous oxide as an oxide gas for atomic absorption in spectrophotometer
and as fuel oxidant for racing vehicles.
The gas containing
some nitrogen is then stored in the gas balloon. The gas is compressed
with a compressor, dried in a drier and then refrigerate when it
becomes liquid. Liquid nitrous oxide is stored in high-pressure
storage vessel into cylinders and the gas is filled by weight. In
a low pressure plant the gas after refrigeration is stored in a
storage tank and from there it is filled in cylinders with a pump.
Each batch is analysed in the laboratory to ensure quality of the
product and proper record is maintained.
- We use water-lubricate
compressor, which is also water-cooled and is better and
more lasting when compared to air or oil cooled units supplied
- The use of
Gas Balloon in place of gas holders gives multiple advantages
A. It does not
occupy floor space.
remains dry since it does not come in contact with water,
which is present in case of gas holders.
C. A gas balloon can hold a larger volume,
which gives more flexibility in subsequent operations.
- Automatic control
keeps the decomposition operation smooth and lets out the
gas to the outer atmosphere in case of need.
- Minimum water
and power consumption.
of operation is added benefits of the design created by
- Double drying