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Ammonia neutralization device and method

A reactive gas and inlet technology, which is applied to chemical instruments and methods, separation methods, and dispersed particle separation, can solve the problems of shortened operation cycle, low ammonia removal rate, and increased loss of organic polymers to reduce the frequency of parking and cleaning , The gas-liquid contact is even, and the effect of improving the quenching effect

Active Publication Date: 2016-10-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Ammonia neutralization device and method

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Effect test

Embodiment 1

[0027] An ammonia neutralization device, 6 pieces of theoretical plate grid fillers are arranged below the reaction gas neutralization liquid inlet and above the reaction gas inlet, the reaction gas neutralization liquid inlet is provided with a hole type liquid distributor, and the reaction gas inlet is provided with dendritic porous Type gas distributor, above the liquid distributor, 2 bubble cap plates with theoretical plates are set as demisters, the removal rate of ammonia in the reaction gas after neutralization reaches 99.2%, and the ammonia neutralization device and subsequent systems are free from clogging. The heat exchange effect of the heat exchanger and the system resistance remain unchanged, the polymerization loss of organic matter is reduced, and the operating cycle of the device reaches 18 months, which prolongs the operating cycle of the device and achieves better technical results.

Embodiment 2

[0029]The ammonia neutralization device includes a shell, a reaction gas inlet and a reaction gas outlet, a reaction gas neutralization liquid inlet and a reaction gas neutralization liquid outlet, the reaction gas inlet is set at the lower part of the ammonia neutralization device, and the reaction gas outlet is set at the ammonia neutralization device At the top, the reaction gas neutralizing liquid inlet is arranged above the reaction gas inlet, and the neutralizing liquid outlet is arranged at the bottom of the ammonia neutralization device, wherein a tray or A liquid distributor is installed at the filler and neutralizing liquid inlet.

[0030] The number of theoretical plates of the trays or fillers arranged below the reaction gas neutralizing liquid inlet and above the reaction gas inlet is 10; the trays are bubble-cap trays; the fillers are grids; The liquid distributor provided at the liquid inlet is a trough-type liquid distributor; the number of theoretical plates o...

Embodiment 3

[0033] The ammonia neutralization device includes a shell, a reaction gas inlet and a reaction gas outlet, a reaction gas neutralization liquid inlet and a reaction gas neutralization liquid outlet, the reaction gas inlet is set at the lower part of the ammonia neutralization device, and the reaction gas outlet is set at the ammonia neutralization device At the top, the reaction gas neutralizing liquid inlet is arranged above the reaction gas inlet, and the neutralizing liquid outlet is arranged at the bottom of the ammonia neutralization device, wherein a tray or A liquid distributor is installed at the filler and neutralizing liquid inlet.

[0034] The number of theoretical plates of the trays or fillers arranged below the reaction gas neutralizing liquid inlet and above the reaction gas inlet is 10; the trays are bubble-cap trays; the fillers are grids; The liquid distributor provided at the liquid inlet is a trough-type liquid distributor; the number of theoretical plates ...

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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...

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/58B01D53/96
CPCY02A50/20
Inventor 顾军民韩诚康
Owner CHINA PETROLEUM & CHEM CORP
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