Spiral flow generating device for deep sea natural gas hydrate fluidization exploitation pipeline conveying

Abstract

The invention relates to a spiral flow generating device for deep sea natural gas hydrate fluidization exploitation pipeline conveying. The spiral flow generating device is provided with a barrel body with the inner diameter of D. A pre-swirling flow rectifier, a core swirling device and a continuous swirling crusher are sequentially arranged in the barrel body in the fluid flowing direction. The pre-swirling flow rectifier is provided with 4-6 inclined ladder-shaped flow deflectors which are uniformly distributed around a central shaft, the core swirling device is provided with 5-8 inclined gradually-changing blade type flow deflectors which are uniformly distributed around a central fixed shaft, and the continuous swirling crusher comprises a plurality of groups of shovel-head-sawtooth-shaped flow deflectors which are fixedly connected to the inner wall of the barrel body in a surrounding manner. According to the spiral flow generating device for deep sea natural gas hydrate fluidization exploitation pipeline conveying, a three-step swirling mode is adopted, so that fluid generates spiral flow motion which is stable in flow state and not prone to attenuation, impact of the fluid on the core swirling device due to axial flow and energy loss caused by collision are reduced, solid particles contained in the fluid can be crushed on a large scale, the fluid can be mixed, and sediments and other substances are prevented from adhering to a pipeline.

Description

technical field [0001] The invention relates to the technical field of fluid transportation, in particular to a spiral flow generating device used for pipeline transportation of deep-sea natural gas hydrate fluidized exploitation. Background technique [0002] Spiral flow is a flow form with a rotating flow field. The fluid in the pipe has both axial and tangential velocities. It is widely used in modern pipeline fluid transportation. This flow mode reduces the impact and friction work between the media, greatly reducing the overall energy consumption of the pipeline; moreover, the helical flow also has a certain effect on the carrying effect of solid particles and effusion in the pipe. Therefore, the liquid carrying of the spiral flow is also a direction of current research. At the same time, related technical applications of spiral flow have also entered the field of people's daily life, such as spiral flow energy-saving gas stoves. The key to the application of spiral f...

AI Technical Summary

Problems solved by technology

This device can generate a certain degree of spiral flow and improve the delivery efficiency of some fluids, but there are still some unresolved problems: the manufacturing process of the device is simple, but the strength of the spiral flow generated is not high, and the safety and reliability are poor

But this invention also has obvious defects: 1. The structure of the spinning blade is too simple, and the helical flow effect generated after the fluid flows through is not good, so the spinning effect is equivalent to being fully borne by the enhanced blade

2. This device requires external energy support, and the enhanced blade adopts the traditional propeller-type power rotor blade, which still consumes a lot of energy

However, there are still some defects. When the fluid flow rate is large, the spinner will still block the slurry to a certain extent, consume the energy of the slurry itself, and may cause a certain degree of water hammer

For now, there are quite a few spiral flow generating devices, but there are more or less defects, such as low impact strength, high energy consumption, poor spiral flow pattern maintenance, and failure to control multiphase mixed fluids. Handling of solid particles in the

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