Two-phase mixing reactor and applications thereof

Abstract

The present invention relates to the field of oil refining, and discloses a two-phase mixing reactor and applications thereof. The two-phase mixing reactor comprises a reactor inlet, a reactor outlet, a reactor tank and a reaction module, wherein the outer surface of the reaction module is provided with a concave groove structure, the projecting side wall of the concave groove structure is connected to the reactor tank, the cavity enclosed by the concave groove structure and the reactor tank forms a mixing flow channel, a cavity unit is arranged in the reaction module and is communicated to the mixing flow channel through the distribution holes arranged on the bottom portion of the concave groove structure of the reaction module, and the flowing direction of a fluid in the cavity unit is opposite to the flowing direction of the fluid in the mixing flow channel due to the arrangement of the inlet of the cavity unit. According to the present invention, with the application of the two-phase mixing reactor in the deep desulfurization of light hydrocarbons, the light hydrocarbon and the alkali liquid flow at the high speed and are intensely mixed, the mass transfer resistance is low, the deep desulfurization is achieved, the acidic sulfur-containing substance removal rate is more than 90%, and the acidic sulfur-containing substance concentration in the liquefied gas can be reduced to less than 10 ppm or less.

Description

technical field [0001] The invention relates to the field of oil refining, in particular to a two-phase mixed reactor and the application of the two-phase mixed reactor in liquid / liquid two-phase or gas / liquid two-phase mixing and reaction. Background technique [0002] The crude liquefied gas produced by the refinery contains a large amount of acidic sulfur-containing substances (mainly hydrogen sulfide and mercaptans), and the acidic sulfur-containing substances are generally removed by alkaline washing in industry. [0003] The liquefied gas can be used to produce clean fuel after deep desulfurization (the concentration of acidic sulfur-containing substances is below 10ppm). However, it is difficult for conventional liquefied gas desulfurization equipment to overcome the mass transfer resistance in the deep desulfurization process under the condition that the operating conditions are basically unchanged. Liquefied gas deep desulfurization requirements. [0004] Since th...

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Problems solved by technology

[0005] The extraction column is a continuous countercurrent equipment that can achieve multiple theoretical levels of separation efficiency, but its equipment scale is large, the operation is relatively complicated, and the material flow rate is slow and the mass transfer coefficient is low.

[0006] The fiber membrane extractor is a kind of co-current operation equipment. Its equipment scale is smaller than that of the extraction tower, and the hydrophilic fiber filaments are used to provide a larger mass transfer area, so the mass transfer efficiency is higher, but the fiber filaments will be damaged after long-term use. Contaminated to lose hydrophilicity, lower mass transfer efficiency, and difficult to clean and regenerate

[0007] The static mixer has the smallest equipment scale and relies on two-phase high-speed flow mixing for mass transfer. However, the mixing structure of the static mixer is difficult to achieve highly dispersed mixing of the liquid / liquid system, so there is still a large bottleneck in the improvement of its mass transfer efficiency.

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