Spraying equipment and method for neutralization reaction

A spraying equipment and reaction technology, which is applied to chemical instruments and methods, separation methods, and dispersed particle separation, etc., can solve problems such as insufficient gas-liquid contact, shortened operation cycle, and increased device consumption, and achieve uniform gas-liquid contact, Improve cooling effect and reduce polymerization loss

Inactive 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 in the ammoxidation reaction device existing in the prior art, there are unreasonable design of quenching tower spray equipment, insufficient gas-liquid contact, low ammonia removal efficiency, and ammonia enters the follow-up tower Heat exchangers, heat exchangers and pipeline systems increase the polymerization loss of organic matter, resulting in blockage of subsequent equipment and pipelines, increased device consumption, and shortened operating cycles. A new type of spray equipment for neutralization reactions is provided.

Method used

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  • Spraying equipment and method for neutralization reaction

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Effect test

Embodiment 1

[0029] Adopt the spray equipment of neutralization reaction of the present invention, set 2 layers in the spray equipment of neutralization reaction of fluidized bed reactor outlet by the reaction gas neutralization liquid spray layer that hollow cone nozzle is arranged in square arrangement, The arrangement density of nozzles is 2 nozzles / m 2 , set 2 theoretical plates below the spray layer of the reaction gas neutralizing liquid inlet and above the reaction gas inlet, set 2 theoretical plates above the spray layer as a demister, and set a dendritic porous distributor at the reaction gas inlet , the removal rate of ammonia in the reaction gas reaches 99.9% after being sprayed and neutralized by the nozzle of the spraying equipment, the spraying equipment and the subsequent system are not blocked, the loss of organic matter polymerization is reduced, the operating cycle of the device is prolonged, and good technical results have been achieved .

Embodiment 2

[0031] The 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 top of the ammonia neutralization device , the inlet of the reaction gas neutralizing liquid is set above the inlet of the reaction gas, and the outlet of the neutralizing liquid is set at the bottom of the ammonia neutralization device, wherein trays or packing are arranged below the inlet of the reaction gas neutralizing liquid and above the inlet of the reaction gas in the ammonia neutralization device , and the inlet of the neutralizing liquid is provided with a liquid distributor.

[0032] Each spray layer is provided with a main pipe, a branch pipe and a short pipe. The branch pipe is arranged on the main pipe, and the short pipe is arranged on the branch pip...

Embodiment 3

[0036] The spray equipment for neutralization reaction includes a shell, a reaction gas inlet and a reaction gas outlet, a neutralization liquid inlet and a neutralization liquid outlet, the reaction gas inlet is set at the lower part of the spray equipment, and the reaction gas outlet is set at the bottom of the spray equipment At the top, the neutralizing liquid inlet is set above the reaction gas inlet, and the neutralizing liquid outlet is set at the bottom of the spray equipment, wherein the neutralizing liquid inlet is set up with a spray layer composed of nozzles arranged in geometric shapes, and each layer of spraying The main pipe, branch pipe and short pipe are arranged on the layer, the branch pipe is arranged on the main pipe, and the short pipe is arranged on the branch pipe, wherein the diameter of the branch pipe is 0.5 times the diameter of the main pipe, and the diameter of the short pipe is 0.7 times the diameter of the branch pipe.

[0037] The number of theo...

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Abstract

The invention relates to a spraying device and method for neutralization reaction, which mainly solves the problem in the prior art that the neutralization efficiency of unreacted ammonia in the reaction gas at the outlet of an ammoxidation reactor is not high. The present invention adopts in the spray equipment of the neutralization reaction: a) the neutralization solution with a temperature of 50-200°C and a weight ratio of 0.3-20 to the reaction gas is distributed from the neutralization liquid formed by the geometric arrangement of the nozzles. b) The neutralized reaction gas enters the top of the spray layer at a speed of 0.2-5m / s, and then enters the subsequent absorption system after passing through the demister. This problem is solved well, and it can be used in the industrial device of ammoxidation reaction.

Description

technical field [0001] The invention relates to a spraying device and method for neutralization reaction, especially suitable for neutralization of ammonia in ammoxidation reaction. 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. In the existing device, the distance between the multi-layer spray layers is generally arranged at the same height, and the spray layer is not arranged in a targeted manner according to the gradual decrease of the ammonia in the reaction gas from the bottom to the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/58
Inventor 顾军民韩诚康
Owner CHINA PETROLEUM & CHEM CORP
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