Process for treating gases in the ammonia synthesis
First Claim
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1. A process for treating the effluent gases from an ammonia synthesis reactor and for recycling such gases with fresh gases to such reactor comprising the following steps:
- absorbing ammonia contained in the effluent gases discharged from the synthesis reactor in the liquid film of a film absorber and obtaining a strong ammonia solution;
blending the effluent gases discharged from said liquid film absorber with fresh gases for feed to said reactor into a heat exchanger and condensing the water contained in the blended effluent and fresh gases;
removing the condensed water from said heat exchange as a weak ammonia solution;
injecting liquid ammonia into gases discharged from said heat exchanger;
feeding said discharged gases with said liquid ammonia injected therein into a separator and separating from said feed in said separator cooled dry gases and a strong solution of ammonia;
feeding said cooled dry gases from said separator into said heat exchanger to cool and condense the water in the blended effluent and fresh gases being fed into said heat exchanger; and
feeding said blended effluent and fresh gases, after the water contained therein has been condensed, from said heat exchanger to said ammonia synthesis reactor.
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Abstract
In the synthesis of ammonia, a process is disclosed for treating the gases flowing from the synthesis reactor wherein those gases flow through a film absorber countercurrent to a cooled aqueous film to extract ammonia which is withdrawn as a strong solution from the absorber and scrubbed gases are combined for recycle with a stream of fresh feed which is then dehydrated by injecting liquid ammonia into the stream so that it rapidly expands and condenses the water vapor therein, and the dried gases are thereafter fed to the synthesis reactor.
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Citations
13 Claims
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1. A process for treating the effluent gases from an ammonia synthesis reactor and for recycling such gases with fresh gases to such reactor comprising the following steps:
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absorbing ammonia contained in the effluent gases discharged from the synthesis reactor in the liquid film of a film absorber and obtaining a strong ammonia solution; blending the effluent gases discharged from said liquid film absorber with fresh gases for feed to said reactor into a heat exchanger and condensing the water contained in the blended effluent and fresh gases; removing the condensed water from said heat exchange as a weak ammonia solution; injecting liquid ammonia into gases discharged from said heat exchanger; feeding said discharged gases with said liquid ammonia injected therein into a separator and separating from said feed in said separator cooled dry gases and a strong solution of ammonia; feeding said cooled dry gases from said separator into said heat exchanger to cool and condense the water in the blended effluent and fresh gases being fed into said heat exchanger; and feeding said blended effluent and fresh gases, after the water contained therein has been condensed, from said heat exchanger to said ammonia synthesis reactor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification