A gas ammonia recovery system and method for recovering emission gas ammonia

Abstract

The invention discloses a gas ammonia recovery system and a method for recovering exhaust gas ammonia. The method comprises a cold ammonia delivery pump, a gas ammonia cooler, a liquid ammonia heater and a gas ammonia washing device, and the method for recovering gas emission gas ammonia: The gas ammonia discharged from the liquid ammonia filling stack enters the gas ammonia cooler to cool and recover most of the gas ammonia, and a small part of the uncondensed gas ammonia is sent to the gas ammonia washing device to be recovered in the form of ammonia water; the gas ammonia cooler uses cold ammonia as the cooling medium , the cold ammonia is sent from the ammonia storage to the gas ammonia cooler for heat exchange with the gas ammonia, then enters the ammonia heater for heating, and then is sent to the liquid ammonia filling stack. The gas ammonia recovery system has a simple device, low investment cost, reduced energy consumption, and is economical and environmentally friendly. The device realizes the use of the cooling capacity of liquid ammonia to cool the liquefied gas and ammonia. Efficient recovery of gas ammonia not only realizes zero emission of gas ammonia, but also has low energy consumption. , which can ensure the stability of the ammonia storage pressure and provide safety guarantee for the liquid ammonia filling platform.

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. pollute. How to recover the emission gas and ammonia economically, energy-saving and environment-friendly ...

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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