Apparatus and method for removing ammonia in ammoxidation gas

An ammonia oxidation reaction and reaction gas technology, applied in chemical instruments and methods, separation methods, air quality improvement and other directions, can solve the problems of shortened operation cycle, organic polymer polymerization loss, increased device consumption, etc., to achieve uniform gas-liquid contact, improve Cooling effect, effect of reducing 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, the removal equipment of ammonia in the reaction gas is unreasonable, the removal efficiency of ammonia is not high, and ammonia enters the subsequent tower, replaces Heater and pipeline system cause the polymerization loss of organic matter, follow-up equipment and pipeline blockage, increased device consumption, and shortened operation cycle. Provide a new ammonia removal equipment in the ammoxidation reaction gas

Method used

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  • Apparatus and method for removing ammonia in ammoxidation gas

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Embodiment 1

[0029] Adopt the removal equipment of ammonia in the ammoxidation reaction gas of the present invention, set 2 layers in the removal equipment and form by the reaction gas neutralization liquid spray layer that hollow cone shower head is arranged in square, the arrangement density of shower head is 2 Nozzle / m 2, the distance between the last spray layer is 1.2 of the distance between the next spray layer, and above the spray layer, 2 bubble cap plates with theoretical plates are set as demisters, and the reaction gas neutralizes the liquid spray layer 6 pieces of theoretical plate grid packing are arranged below and above the inlet of the reaction gas, and a dendritic porous distributor is installed at the inlet of the reaction gas. The removal rate of ammonia in the reaction gas reaches 99.9% after being neutralized by the spray layer of the nozzle of the removal equipment, effectively The ammonia in the reaction gas is effectively removed, the polymerization loss of organic ...

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 an apparatus and method for removing ammonia in ammoxidation gas. The apparatus and method mainly overcome the problem of low removal efficiency of ammonia in reaction gas from an outlet of an ammoxidation fluidized bed reactor in the prior art and the problems of increase of polymerization loss of organic matter, blockage of towers and pipelines and shortening of the operation cycle of equipment after ammonia enters a subsequent system in the prior art. The apparatus provided by the invention comprises a shell, a reaction gas inlet, a reaction gas outlet, a reaction gas neutralizing liquid inlet and a reaction gas neutralizing liquid outlet, wherein the reaction gas neutralizing liquid inlet is provided with spraying layers formed by geometrically arranged nozzles at positions above the reaction gas inlet in the apparatus, distances among the spraying layers gradually increase from bottom to top, an upper inter-spraying layer distance is 1 to 1.5 times of the lower adjacent inter-spraying layer distance, and the reaction gas inlet is provided with a gas distributor. According to the invention, neutralizing liquid and reaction gas are in countercurrent contact, so problems in the prior art are overcome; and the apparatus and method can be applied to an industrial apparatus used for ammoxidation.

Description

technical field [0001] The invention relates to a device and method for removing ammonia in ammoxidation reaction gas. 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., which affects the normal operation of the device. Therefore, the rapid and thorough neutralization of unreacted ammonia in the reaction gas is essential for extending the operating cycle of the device. , reducing the consumption of the device has very important practical significance and economic benefits. [0003] Document US3885928 has introduced a kind of recovery and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/58
CPCY02A50/20
Inventor 顾军民张斌
Owner CHINA PETROLEUM & CHEM CORP
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