Gas-liquid two-phase flow uniform distribution device

Abstract

The invention discloses a gas-liquid two-phase flow uniform distribution device, which mainly comprises a main distributor pipe, a hydrocyclone, a rectifier, critical nozzles and branch distributor pipes, wherein the hydrocyclone and the rectifier are sequentially arranged in the main distributor pipe; the critical nozzles are arranged on the wall of the main distributor pipe at the downstream of the rectifier; and the rear part of each critical nozzle is connected with a branch distributor pipe; gas-liquid two-phase flow is subjected to the action of the hydrocyclone and the rectifier, so the unsymmetrical flow patterns, such as stratified flow, wave flow and incomplete annular flow are rectified into an annular flow pattern that the thickness of the liquid film is uniformly distributed, which ensures that branch pipes at the downstream have an equal chance to contact the gas-liquid phase; the gas-liquid two-phase mixture in the critical flow nozzles is accelerated to be in the state of critical flow; and the changes of parameters such as downstream pressure and the like are not delivered to the upstream, so the defect of the phase separation caused by the inconsistent resistance characteristics of the branch pipes at the downstream is overcome and the uniform distribution is realized. Compared with the prior art, the gas-liquid two-phase flow uniform distribution device is not affected by the fluctuation of the downstream parameters of the branch pipes of the distributor, does not need human intervention, can carry out self-adaptive adjustment, and has the advantages of small volume, compact structure, no moving parts, no maintenance, good environmental adaptability.

Description

Technical field [0001] The invention relates to a fluid distribution device, in particular to a device for uniformly distributing gas-liquid two-phase fluid in a main pipe to multiple downstream branch pipes. Background technique [0002] In gas-liquid two-phase flow systems, fluid distribution is often unavoidable. When the gas-liquid two-phase mixture passes through the distribution pipe, the gas-liquid phase ratios of the downstream branches are usually different from each other, which is the so-called phase separation phenomenon. The uneven flow distribution caused by phase separation seriously affects the safe and efficient operation of industrial equipment. Therefore, in industrial applications, it is always hoped that the two-phase fluid at the outlet of each branch has the same mass flow rate and gas-liquid phase ratio. The liquid two-phase flow is evenly distributed. [0003] At present, symmetrical distributors are mainly used at home and abroad. The main feature...

AI Technical Summary

Problems solved by technology

The disadvantage of the distributor based on the time-sharing principle is that its key component, the distribution runner, is a moving part, which is prone to jamming under the condition of large gas phase flow; in addition, this distributor is also affected by the downstream parameters of each branch pipe. Because the resistance characteristics of the downstream branch pipelines cannot be completely consistent, the ratio of the gas mass flow rate entering the distribution pipeline to the gas mass flow rate of the main pipeline cannot be kept constant

Due to the low gas momentum, it is very sensitive to the downstream pressure change, and it is easier to enter the branch with small resistance. For the currently proposed types of distribution devices, if the resistance characteristics of each downstream channel are different, it will be difficult to achieve uniform distribution of the gas-liquid phase.

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