A kind of ammonia synthesis reaction system and ammonia synthesis reaction method

Abstract

The invention discloses an ammonia synthesis reaction system. The ammonia synthesis reaction system comprises an ammonia synthesizing tower, a combined waste boiler, a feed water heater, a circulation gas heat exchanger, a water cooler, a combined ammonia cooler, a diamine cooler, an ammonia separator, a liquid ammonia tank and a circulator. Gas preheated by the circulation gas heat exchanger enters the ammonia synthesizing tower, and the gas after the reaction directly enters the combined waste boiler from the bottom of the ammonia synthesizing tower. The ammonia synthesis reaction system has the advantages that the equipment number of the new system is reduced, the new system is small in floor space and low in system resistance, and system investment cost is lowered; the novel ammonia synthesizing tower is high in volume utilization rate, more catalysts can be loaded into the ammonia synthesizing tower under the same diameter, the ammonia net value of the synthesizing tower is increased, and the productivity of the new system can be increased favorably; the novel ammonia synthesizing tower is directly connected with the combined waste boiler without an external pipeline, the external pipeline is omitted, and one equipment is omitted; the combined ammonia cooler has combined functions of hot gas cooling and first-level ammonia cooling, and another equipment is omitted.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to an ammonia synthesis reaction system and an ammonia synthesis reaction method applied in ammonia synthesis production. Background technique [0002] The reaction equation for the synthesis of ammonia is as follows: [0003] 3H 2 +N 2 →2NH 3 +Q [0004] The ammonia synthesis reaction is a reversible reaction, which is carried out in a reactor equipped with a catalyst. The catalyst activity has a certain temperature range, generally at 340°C to 520°C, and the reaction speed is very slow below 340°C, requiring a large amount of catalyst. The reactor Large size; higher than 340°C, the crystals in the catalyst will grow and the activity will decline. [0005] The ammonia synthesis reaction is still an exothermic reaction. It is necessary to install a heat exchanger in the reactor to continuously remove heat so that the temperature of the reaction gas is ≤520°C, and at t...

AI Technical Summary

Problems solved by technology

[0012] 1. The internal parts of the intercooled ammonia synthesis tower occupy the volume of the reactor, and the amount of catalyst loading is reduced, which affects the output of the device;

[0013] 2. There are many devices in the process, the system resistance is large, and the energy consumption is large

[0014] 3. There are many equipments and the floor area is large

[0015] 4. The utilization rate of the catalyst in the ammonia synthesis tower is low, and the net value of ammonia is not high

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