HP synthesis equipment
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HP Stripper
In the high-pressure stripper, the carbon dioxide, entering the synthesis as a feed, flows counter-current to the urea solution leaving the reactor. On the shell side, the high-pressure stripper is heated with steam. The off-gas of the high-pressure stripper, containing the carbon dioxide, together with the dissociated carbamate, is then fed into the pool condenser.
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Pool condenser
The pool condenser design is based on ammonia and carbon dioxide being condensed to form carbamate in a pool of liquid - where at the same time a substantial part of the conversion to urea takes place.
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Pool reactor
The Stamicarbon Pool Reactor concept combines the condenser and reactor within a single pool reactor.
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HP scrubber
The high pressure scrubber is designed to minimize the emissions from the synthesis section. Here the offgass from the synthesis section is washed with the carbamate solution from the low-pressure recirculation stage.
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HP carbamate condenser
The carbamate solution from the HP scrubber is transferred with the HP ejector to the HP carbamate condenser or Pool condenser. The control and operation of the HP ejector can be checked by the temperatures at the in- and outlet of the ejector. A too low carbamate solution level in the suction line of the HP ejector can result in gas slipping through from the HP scrubber into the discharge line of the HP ejector resulting in a higher temperature of the outlet mixture.
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