Integration device of rotational-flow liquid separation, rotational-flow desulfurization and rotational-flow alkaline control of low-pressure separated gas in hydrogenation device and implementation method thereof

Abstract

The invention relates to an integration device of rotational-flow liquid separation, rotational-flow desulfurization and rotational-flow alkaline control of low-pressure separated gas in a hydrogenation device and an implementation method thereof and provides the integration device of rotational-flow liquid separation, rotational-flow desulfurization and rotational-flow alkaline control of low-pressure separated gas in the hydrogenation device. The integration device comprises a bearing shell (51) and a liquid-collecting partitioning plate (513) arranged in the bearing shell (51), wherein theliquid-collecting partitioning plate (513) divides the bearing shell (51) into a gas-liquid separation section A and a desulfurization and alkaline-control section B which are communicated by a gas rising pipe in the bearing shell (51). The invention also provides the implementation method of the integration device of rotational-flow liquid separation, rotational-flow desulfurization and rotational-flow alkaline control of low-pressure separated gas in the hydrogenation device.

Description

technical field [0001] The disclosure belongs to the technical field of petroleum processing, and relates to an integrated device for liquid droplet separation, gas selective absorption, and absorbent separation in medium-pressure gas. -Swirl flow desulfurization-swirl flow alkali control integrated device and its implementation method. Background technique [0002] As of April 2013, there are more than 40 sets of hydrocracking (upgrading) units in operation in my country, and the total processing capacity has exceeded 60.0Mt / a, accounting for more than 19.0% of the primary processing capacity of crude oil, far exceeding the world average level. With the construction of a new round of large refining and chemical enterprises and the capacity expansion and transformation of old enterprises, hydrocracking units are springing up, and the total number of units and total processing capacity are growing rapidly. It is estimated that by 2020, my country's hydrocracking (upgrading) T...

AI Technical Summary

Problems solved by technology

Both the separation tank and the deamination tank in the above process are separated by gravity sedimentation, the separation efficiency is not high, the equipment occupies a large area and it is difficult to efficiently solve the problem of low-separation gas and liquid

At the same time, in the traditional low-separation gas separation, desulfurization and alkali control technologies, the low-separation gas passes through the liquid separation tank, desulfurization tower and deamination tank successively. There are many high-pressure equipment, and a large number of high-pressure valves and pipelines are required. The equipment cost and Large investment in land occupation, does not conform to the development trend of "low carbon, environmental protection, high efficiency, energy saving"

[0006] In order to solve the problems of desulfurization solvent foaming caused by low gas content in the desulfurization process of low gas content in the traditional hydrogenation process, low desulfurization efficiency, alkaline amine liquid entrainment in low gas content after desulfurization, equipment cost and large floor area, etc., Many scholars have studied the desulfurization devices and methods of low fraction gas in the hydrogenation process

Chinese patent CN 203090739 U invented a desulfurization absorption tower. After the desulfurization flue gas enters the tower body, it first passes through the slurry spray layer for desulfurization, and then contacts with the slurry spray layer for further desulfurization. The discharge device after dripping, the device uses two different spraying methods to treat the sulfur-containing flue gas, which improves the contact area, mixing degree and liquid-gas ratio between the flue gas and the slurry, and improves the desulfurization efficiency; but this method cannot solve the problem of With the problem of solvent foaming caused by liquid droplets entrained in the processing gas, and the equipment is more complicated

Chinese patent CN202478807 U also provides a gas desulfurization device, the main internal components are "I"-shaped intake pipe, liquid holding plate with many small holes evenly distributed, downcomer, etc., the device is replaced by a liquid holding plate with holes The traditional packing structure solves the shortcomings of the traditional packing structure such as low desulfurization rate, easy clogging, and insufficient production capacity; but it still cannot solve the problems of solvent with amine liquid and solvent foaming after desulfurization, especially difficult to apply to hydrogenation units A process in which hydrocarbons are entrained in the gas and further precipitated during the transportation process

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