Turbomachinery for Nitric Acid Plants - MAN Diesel & Turbo
Turbomachinery for Nitric Acid Plants - MAN Diesel & Turbo
Turbomachinery for Nitric Acid Plants - MAN Diesel & Turbo
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Processes<br />
For the production of nitric acid there<br />
are four basic processes which are distinguished<br />
by their pressure levels <strong>for</strong><br />
combustion and absorption:<br />
4<br />
Low/medium and medium/high<br />
two-pressure process<br />
6<br />
1 Air compressor<br />
2 NH 3 burner<br />
3 NO compressor<br />
1<br />
4 Absorption tower<br />
5 Tail gas expander<br />
6 Steam turbine<br />
2<br />
1. Low/medium two-pressure process<br />
Combustion at atmospheric pressure,<br />
absorption at medium pressure (4-6 bar)<br />
2. Medium-pressure process<br />
Combustion and absorption at medium<br />
pressure (4-6 bar)<br />
3. Medium/high two-pressure process<br />
Combustion at medium pressure (4-6 bar),<br />
absorption at high pressure (10-12 bar)<br />
3<br />
5<br />
4<br />
4. High-pressure process<br />
Combustion and absorption at high<br />
pressure (8-13 bar)<br />
<strong>MAN</strong> <strong>Turbo</strong> has supplied machines <strong>for</strong><br />
all four processes. These are, depending<br />
on the process:<br />
air compressors (cooled and uncooled)<br />
nitrous gas compressors<br />
tail gas expanders<br />
steam turbines.