Magnetostrictive Level Detector in Flashing Process Tanks
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Solution Overview
Problem
Existing level detection systems in process tanks, particularly in flashing process tanks, face inaccuracies due to turbulence and temperature gradients, leading to errors in fluid level measurement, as they struggle to replicate internal vessel conditions accurately.
Innovation Solution
A direct level magnetostrictive measurement system is implemented within the tank, using a float well that replicates internal conditions and prevents turbulence, combined with a single flanged probe containing both the level sensor and temperature probe, ensuring accurate measurements by maintaining a stable environment for the float.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If direct level detectors (ultrasonic, guided wave) are used in flashing process tanks, then level detection is attempted, but measurement accuracy deteriorates due to turbulence at the vapor/liquid interface
Solution Approach 1:
The patent introduces a float as an intermediary element that indirectly measures liquid level without direct contact with the turbulent vapor/liquid interface. The float responds to liquid level changes through buoyancy while being isolated from the harmful turbulence by the tank wall and guide structure, thus resolving the contradiction between measurement need and turbulence interference
2Measurement precision
If level detectors are placed directly in the tank, then level measurement is possible, but measurement stability deteriorates due to harsh environment (high temperature, high pressure)
Solution Approach 1:
The float acts as an intermediary that transfers information about liquid level to the external measurement system without being directly exposed to the harsh thermal and pressure environment. The float is contained within a guide structure that protects it while allowing it to respond to liquid level changes, thus maintaining measurement reliability in high temperature and pressure conditions
Solution Approach 2:
The patent replaces direct mechanical/electronic detectors exposed to harsh conditions with a buoyancy-based float mechanism that operates reliably in high temperature and pressure environments. The float's mechanical response to buoyancy forces is inherently more robust than electronic sensors in such conditions, while magnetic coupling provides non-contact measurement capability
3Adaptability or versatility
If multiple separate detectors are used for level and temperature measurement, then comprehensive monitoring is achieved, but device complexity increases
Solution Approach 1:
The patent combines level measurement and temperature measurement capabilities into a single integrated detector assembly. The float incorporates both level sensing (through its position in the guide) and temperature sensing (through an integrated temperature sensor), reducing the number of separate devices needed while maintaining comprehensive monitoring capability in flashing process tanks
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
This solution provides stable and accurate fluid level measurements, reducing errors caused by temperature gradients and turbulence, and allowing for precise control of process conditions in high-pressure and temperature environments.
Implementation Method 1
float magnetostrictive level detector
Implementation Method 2
float level detectors
Data Source
AI summary
The invention is a process tank containing a direct level magnetostrictive measurement system disposed directly in the tank, where the level system preferably communicates to a remote location. One embodiment of the invention embodies an internal well guide chamber, which exactly replicates the actual vessel's internal conditions (pressure and temperature), and also prevents the float from being affected by turbulence from a two phase condition, such as might occur if boiling or flashing is present inside the vessel. The process tank should have a fluid temperature different by more than 50° C. from the ambient environment, or alternatively, be a flashing tank.