Ammonia synthesis reactor

Abstract

The invention discloses an ammonia synthesis reactor which comprises an ammonia reactor, a steam drum, a boiler feed water heater and a hot water pump, the ammonia reactor is provided with an ammonia reactor outer cylinder, and an ammonia reactor internal part is arranged in the ammonia reactor outer cylinder; the ammonia reactor internals comprise a first-stage heat insulation catalyst bed layer, a first-stage interlayer heat exchanger, a second-stage heat insulation catalyst bed layer, a second-stage interlayer heat exchanger and a last-stage catalyst bed layer which are sequentially connected from top to bottom, and a water heat transfer heat exchanger is arranged in the last-stage catalyst bed layer; the boiler feed water pipe is communicated with the boiler feed water heater, and the boiler feed water heater is communicated with the steam pocket through a steam pocket water supplementing pipe; according to the invention, the reaction heat of the last-stage catalyst bed is timely removed by water in the water heat transfer tube bundle buried in the catalyst bed, and 12.0 MPa saturated steam is produced as a byproduct, so that the reaction heat of the catalyst bed is not gathered and accumulated, the temperature of the catalyst bed is always controlled at-340 DEG C and is far away from an equilibrium curve, and the ammonia content at the outlet of the bed is 41.53%.

Description

technical field [0001] The invention relates to the technical field of chemical equipment, in particular to an ammonia synthesis reactor. Background technique [0002] At present, the existing large-scale low-pressure (15.0MPa) ammonia synthesis reactors of ammonia synthesis technology suppliers at home and abroad are all three-stage adiabatic catalyst beds, and interlayers are used between the first and second adiabatic beds and between the second and third adiabatic beds. The gas-gas heat exchanger removes the heat at the outlet of the adiabatic section to ensure that the gas temperature at the inlet of the next-stage adiabatic catalyst bed is ≤380°C, and the high-temperature synthesis gas at the outlet of the third-stage adiabatic catalyst bed directly enters the direct-connected waste heat boiler, and the by-product is saturated at 3.8MPa steam. [0003] The existing ammonia synthesis reactor operates under the parameters of the best operating parameters, and the net va...

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Problems solved by technology

[0004] The existing ammonia synthesis reactor adopts the method of direct connection between the waste heat boiler and the outlet gas of the three-stage bed of the ammonia synthesis reactor. Thi

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