Ammonia dehydrating technology in production process of acrylonitrile
A production process and technology of acrylonitrile, applied in the technical field of ammonia dehydration, can solve the problems of large ammonia, heavy workload of operators, loss, etc., and achieve the effects of reducing ammonia loss, improving evaporation efficiency, and reducing ammonia loss
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[0019] In the production process of acrylonitrile, the liquid ammonia and liquid propylene are evaporated and sent to the reactor for reaction, and the generated gas (acrylonitrile, etc.) is sent to the cooler and the quenching tower for cooling, and then sent to the absorption tower for water absorption, and finally sent to the refining Unit purification processing. According to the requirements of the process, it is more beneficial when the temperature of the absorption water in the absorption tower is lower. Therefore, this part of water is sent to the ammonia evaporator to cool down and provide the heat required by the ammonia evaporator. Specifically, the absorption tower is divided into three sections. The temperature of the water discharged from the upper section is 30°C. This part of the water is sent to the ammonia evaporator to cool down to, for example, 4°C. The heat; and the low-temperature water (for example, water cooled to 4°C) from the ammonia evaporator is sen...
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