Process of producing ammonium nitrate with exhausted gas from synthetic ammonia freezing system

A refrigeration system and air release technology, applied in the direction of ammonium nitrate, refrigeration and liquefaction, liquefaction, etc., can solve the problems of increased ammonia water volume, increased energy consumption, and increased electricity load of ice machines, so as to reduce outlet pressure, The effect of increasing the air volume and reducing the power load

Inactive Publication Date: 2007-01-03
宋三奎
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Problems solved by technology

[0005] The problem of the above process is that the air volume of the water cooler of the ice machine is large, especially in summer, and the air volume is larger, which increases the amount of ammonia water produced by the ammonia purification system. On the one hand, it directly affects the production balance of urea. The desorption section brings difficulties, on the other hand, it also increases the electricity load and energy consumption of the ice machine
However, the actual production process found that reducing the amount of ammonia at the inlet of the ice machine did not effectively reduce the electricity load of the ice machine. Only reducing the outlet pressure of the refrigeration system is the most effective way to reduce the electricity load of the ice machine

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  • Process of producing ammonium nitrate with exhausted gas from synthetic ammonia freezing system

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Embodiment Construction

[0012] The liquid ammonia from the liquid ammonia storage tank is passed into the ammonia cooler of the synthetic ammonia section. After the hydrogen-nitrogen mixed circulating gas is cooled, the evaporated gas ammonia is all sent to the refrigeration system. After being pressurized by the ice machine, it is cooled in the ice machine water cooler It is liquid ammonia, which is sent into the liquid ammonia storage tank from the lower part for the recycling use of the ammonia cooler, and the insufficient part is supplemented by the large liquid ammonia storage tank.

[0013] The water cooler of the ice machine is connected with the gas phase of the liquid ammonia storage tank, and is used to vent the non-condensable gas accumulated in the water cooler of the ice machine. Release air directly into the ammonium nitrate neutralizer, react with nitric acid to produce ammonium nitrate solution, and form ammonium nitrate product through evaporation and crystallization process, in which...

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Abstract

The method of recovering the exhausted gas from freezing system in synthetic ammonia production is to feed the exhausted gas to ammonium nitrate neutralizer for reacting with nitric acid to produce ammonium nitrate solution, rather than to feed the exhausted gas to ammonia purifying system for recovering ammonia. The method of the present invention can reduce the exhaust pressure of the freezing system and reduce the electric load of the freezing system.

Description

technical field [0001] The invention relates to the production of synthetic ammonia, in particular to a method for recovering vented air produced by a refrigeration system in the production of synthetic ammonia. In the present invention, the released air is directly used in the production of ammonium nitrate to replace the original process of using the ammonia purification system to recover ammonia. Background technique [0002] The technological process of the refrigeration system in the traditional synthetic ammonia production is: liquid ammonia evaporates during the process of cooling the hydrogen-nitrogen mixed cycle gas in the ammonia cooler of the synthetic ammonia section, and sends the ammonia gas to the freezing section, which is pressurized by the ice machine and then sent to the water cooler of the ice machine for further processing. After cooling, the ammonia gas is liquefied, and enters the liquid ammonia storage tank from the lower part of the water cooler of t...

Claims

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Application Information

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IPC IPC(8): C01C1/18F25J1/02
Inventor 宋三奎韩永庆
Owner 宋三奎
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