Low pressure drop demister for segregation and separation integration apparatus

Abstract

The invention relates to a low pressure drop demister for a segregation and separation integration apparatus. The low pressure drop demister comprises a separator shell and a segregator, the segregator is arranged in the separator shell, and a hot gas channel is formed between the segregator and the separator shell; the upper part of the separator shell is provided with a hot gas outlet, a hollow flow guiding column with the upper end and the lower end respectively being opened is correspondingly arranged below the segregator, a hot gas channel is arranged between the flow guiding column and the separator shell, a plurality of demisting grills are arranged in the flow guiding column from top to bottom, the adjacent demisting grills are arranged in a staggered manner, the demisting grills are obliquely arranged on the flow guiding column, an annular demister is arranged in the hot gas channel between the segregator and the separator shell, and the hot gas outlet is provided with a second-stage centrifuging device. The low pressure drop demister can effectively and thoroughly separate liquid form entrainments formed in the steam-liquid separation process.

Description

technical field [0001] The invention belongs to the technical field of demister for gas-liquid two-phase flow equipment, and in particular relates to a low-pressure drop demister for condensate-separation integrated equipment. Background technique [0002] Liquid foam entrainment is a common phenomenon in vapor-liquid two-phase flow equipment such as evaporation crystallizers, distillation rectification towers, and condensing equipment. The entrainment of liquid foam will lead to a decrease in the quality of the condensate in the evaporation crystallizer, a decrease in the efficiency of the distillation and rectification tower, and a decrease in the separation efficiency of light and heavy components in the condensing equipment, which will increase the difficulty and cost of subsequent treatment. The entrainment of liquid foam leads to a decrease in the efficiency of the product loss board, and in severe cases, the equipment cannot operate normally. [0003] In order to pre...

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Problems solved by technology

The disadvantages of these demisters are: increased pressure drop, and need for regular cleaning, etc.

[0005] It was found that the light component gas was mixed into the heavy component, and then partially condensed in the subsequent cooler, which affected the subsequent separation and blocked some equipment; it was found that the water in the light component appeared in the heavy component, which affected the downstream separation; heat imbalance , affecting heavy component cooling and cold gas heating

[0006] The reason for the above problems is that a small amount of particles entrained in the hot gas will be blocked in the gap of the screen after running for a period of time, increasing the pressure drop. When the pressure drop of the hot side channel exceeds the limit, plus the heat caused by the hot and cold fluid The joint effect of stress causes deformation of the thermal measuring gas channel, resulting in fracture of the weld and leakage of the hot gas; the hot gas leaks through the crack and short-circuits and directly enters the light component gas channel, which is lost in subsequent coolers and pipelines, and even in the compressor. The heavy component is found, which can also be judged by the temperature difference between the heavy component and the light component gas (there should be only a small difference in temperature); the leakage loss of the heavy component gas directly leads to the reduction of the amount of heavy component condensate, which further affects the distillation The flow rate of the tower and the amount of heat exchange with the bottom of the tower affect the temperature of the discharge; the leakage of the heavy component gas short-circuits reduces the oil and gas entering the condensing part, resulting in local supercooling and partial condensation of water vapor as a light component , thus affecting the feed composition of the distillation column; due to the reduction of the amount of heavy component gas entering the partial condenser, it also affects the heat exchange balance with the feed gas, thereby affecting the feed temperature of the syngas

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