Gas ammonia recovery system and method for recovering discharged gas ammonia

Abstract

The invention discloses a gas ammonia recovery system and a method for recovering discharged gas ammonia. The method comprises a cold ammonia conveying pump, a gas ammonia cooler, a liquid ammonia heater and a gas ammonia washing apparatus. The method for recovering discharged gas ammonia is as follows: the gas ammonia discharged from a liquid ammonia filling stack platform is introduced to the gas ammonia cooler, most of the gas ammonia is cooled and recovered, and a few uncondensed gas ammonia is fed into the gas ammonia washing apparatus to be recovered in the form of ammonia water; and thegas ammonia cooler uses cold ammonia as a cooling medium, the cold ammonia is fed into the gas ammonia cooler from an ammonia depot to be subjected to heat exchange with the gas ammonia, then heatedin the ammonia heater, and then fed into the liquid ammonia filling stack platform. The gas ammonia recovery system is simple in apparatus, low in investment cost, low in energy consumption, economic,and environment friendly. The apparatus realizes the use of liquid ammonia cooling capacity to cool and liquefy the gas ammonia and efficiently recover the gas ammonia. Zero emission of the gas ammonia is realized, the energy consumption is low, the pressure stabilization of the ammonia depot is guaranteed, and the safety guarantee for the liquid ammonia filling stack platform is provided.

Description

technical field [0001] The invention relates to a synthetic ammonia-related chemical production process and supporting equipment, in particular to an improved gaseous ammonia recovery system and a method for recovering gaseous ammonia emitted from the ammonia synthesis process, belonging to the technical field of ammonia production. Background technique [0002] Ammonia is a common chemical material widely used in chemical industry, light industry, chemical fertilizer, pharmaceutical, synthetic fiber, plastic, dyestuff, refrigerant and other industries. In the process of production, use, storage and sales of liquid ammonia, a certain amount of gas ammonia will be generated. If it is not recycled, it will cause the loss of ammonia and reduce the economic benefits of the enterprise. At the same time, the random emptying of ammonia will also cause environmental pollution. Pollution. How to recover the emission gas and ammonia economically, energy-saving and environment-friendl...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the project investment is too large, and the heat generated in the process of absorbing ammonia water is refrigerated through the compressor to achieve a cooling effect, thereby improving the recovery efficiency of gaseous ammonia to more than 99%, and the compressor and cycle are consumed in the process. Considering the energy of the pump, there is also the problem of large energy consumption

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