Ammonia neutralization device and neutralization method

Abstract

The invention relates to an ammonia neutralization device and method. The device and the method are mainly used for solving the problems in the prior art that the rate of removal of ammonia from reactant gases in an ammonia oxidation reaction is low, the ammonia enters a subsequent system, the polymer loss of organic matters is increased, the clogging to towers and pipelines is caused, and the operation cycle of equipment is shortened. According to the ammonia neutralization device and method, by adopting the technical scheme that the ammonia neutralization device comprises a shell, a reactant gas inlet, a reactant gas outlet, a reactant gas neutralizing solution inlet and a reactant gas neutralizing solution outlet, a tower plate or filler which is located below the reactant gas neutralizing solution inlet and above the reactant gas inlet is arranged in the ammonia neutralization device, a liquid distributor is arranged at the neutralizing solution inlet, and a reactant gas neutralizing solution is in counter-flow contact with the reactant gases, the problems are better solved, and thus the device and the method can be applied to an industrial unit for the ammonia oxidation reaction.

Description

technical field [0001] The invention relates to an ammonia neutralization device and a neutralization method. Background technique [0002] In the ammoxidation reaction device, the reaction gas at the outlet of the fluidized bed reactor contains unreacted ammonia, which must be removed as soon as possible, and the removal must be thorough, otherwise the ammonia entering the subsequent system will cause the pH value of the system to increase, resulting in increased product loss. It affects the recovery rate of the product, and also causes polymer blockage in towers, heat exchangers, pipelines, etc., affecting the normal operation of the device. At present, multi-layer spray layers are used to neutralize ammonia, the gas-liquid contact is insufficient, and the removal efficiency of ammonia is not high. The consumption has very important practical significance and economic benefits. [0003] Document US3885928 has introduced a kind of recovery and refining system of alkenonit...

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Problems solved by technology

[0004] One of the technical problems to be solved by the present invention is that the removal rate of ammonia in the reaction gas in the ammonia neutralization device in the prior art is low, ammonia enters the follow-up system, increases the polymer loss of organic matter, and causes blockage of towers and pipelines , to shorten the operation period of the device, and provide a new ammonia neutralization device

[0005] The second technical problem to be solved by the present invention is that the neutralization method of ammonia in the ammoxidation reaction existing in the prior art is unreasonable, the removal efficiency of ammonia is not high, and ammonia enters subsequent towers, heat exchangers and pipeline systems, resulting in subsequent Provide a new ammonia neutralization method for the problems of equipment and pipeline blockage, increased device consumption, and shortened operating cycle

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