Online degassing method and device for pipeline fluid

Abstract

The invention relates to an online degassing method and device of a pipeline fluid. The method comprises the following steps: changing the linear motion of the pipeline fluid to the rotary flow motion through a helical flow guider, and initially and quickly degassing liquid under the action of a rotary centrifugal force; then, separating out part of dissolved gas under micro negative pressure formed by a venturi ejector with the helical flow guider and quickly and deeply degassing liquid containing trace gas under the action of the centrifugal force; at last, discharging the gas to a gas liquid separation tank for separation through a flow guide pipe, discharging the separated gas, and returning the liquid in the liquid separation tank to a pipeline. The device realizing the method comprises an inlet outlet joint flange, the helical flow guider, an umbrella-shaped top cap, the venturi ejector, the gas flow guide pipe, the liquid separation tank and a liquid discharging valve. The device is ingenious in design and small in size, can be directly connected to the pipeline, has energy-saving and consumption-reducing effects on conveying of gas-containing fluid, and can be widely applied to various fluid conveying processes in petrochemical industry.

Description

technical field [0001] The invention relates to a method and device for online degassing of pipeline fluid, in particular to a method and device for online degassing of pipeline fluid by utilizing centrifugal force and Venturi jet flashing action. Background technique [0002] In petrochemical, coal chemical, food, water treatment, oil extraction and other industries, there are a large number of liquid degassing processes. Efficient and economical degassing technology plays an important role in the efficient, safe and long-term operation of the device. As the pipeline is the carrier of fluid transportation, the liquid is transported under pressure due to the pressure drop of the pipeline (such as elbows, gantry, tapered and expanded pipe joints), which will cause dissolved gas to precipitate out of the liquid, which will cause air resistance, local corrosion, etc. problem, has become a problem in the process of fluid pipeline transportation. [0003] At present, the main te...

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Problems solved by technology

The patent with application number 201310036308.7 discloses a method and device for degassing acidic water. It adopts multiple swirl degassing core tubes built into the equipment to realize the removal of acidic liquid. On-line rapid degassing process for pipelines

The patent application No. 201310037577.5 discloses a device for liquid degassing by coupling a swirl or centrifugal field with a pressure gradient field, but this device can only be used for deep degassing of liquids. Under the working condition with gas, it is not suitable for the working condition when the gas content is large. It is mainly used for the concentrated advanced treatment of liquid, and it is not suitable for the online rapid degassing of pipeline fluid.

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