Gas Separator Weir Structure for Accurate Multiphase Flow Measurement
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Solution Overview
Problem
Current flow measurement devices are ineffective for two-phase flows, leading to increased measurement uncertainty or impossibility when dealing with fluids containing gas bubbles or bubbles in liquids, as they are designed for single-phase fluids.
Innovation Solution
A gas separator with a tubular basic unit, a weir with a guiding surface that allows gas bubbles to escape, and a gas drain tube with a funnel-shaped cross-sectional narrowing, along with flow measuring devices for precise measurement of gas and liquid components, is used to separate and measure multiphase media efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If flow measurement devices designed for single-phase fluids are used for two-phase flows, then device complexity is reduced, but measurement precision deteriorates due to increased measurement uncertainty or impossibility
Solution Approach 1:
The measurement system is segmented into distinct functional components: a gas separator that divides the two-phase flow into gas and liquid streams, and separate flow measurement devices for each phase. This segmentation allows each measurement device to operate on a single phase, maintaining measurement precision while avoiding the complexity of developing a single device for two-phase measurement.
2Reliability
If separators with various structural solutions like perforated plates are applied, then gas removal capability is improved, but device complexity increases
Solution Approach 1:
The gas separator extracts and removes gas bubbles from the liquid stream using a relatively simple internal structure with a collection chamber and outlet, avoiding the need for complex perforated plates or multiple separation stages. This extraction approach achieves effective gas removal while keeping the device structure simple.
3Reliability
If a weir with guiding surface is used to create a shallow water region for gas escape, then gas separation efficiency is improved, but device complexity increases
Solution Approach 1:
The weir creates a localized shallow water region with specific flow characteristics that enhances gas bubble rise and separation. By concentrating the separation function in this localized area with optimized geometry, effective gas separation is achieved without requiring complex structures throughout the entire device.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient separation and measurement of gas bubbles from liquids, reducing measurement uncertainty and allowing for accurate flow measurement of both components in multiphase media, particularly in natural gas-water mixtures, while preventing gas escape into the atmosphere.
Implementation Method 1
the gas contained in the medium can escape from the medium in the shallow water region
Implementation Method 2
The greater intake region of the gas drain tube serves for removal of liquid fractions from the gas
Implementation Method 3
a vortex breaker is arranged for preventing bubble entrainment into the liquid
Data Source
AI summary
A gas separator for separating a multiphase medium containing a gas and a liquid includes a tubular basic unit having a longitudinal axis, an intake for a gaseous medium, a liquid outlet and a gas outlet. The tubular basic unit has an intake region and a discharge region. The gas separator includes, between the intake region and the discharge region, a weir having a guiding surface, over which the medium can flow to form a shallow water region. The gas contained in the medium can escape from the medium in the shallow water region and be led away from the gas separator through the gas outlet. The disclosure is also directed to an apparatus for registering flow of at least one component of a multiphase medium.