Plaster Slurry Foam Metering for Real-Time Density Control
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Solution Overview
Problem
Existing methods for monitoring and controlling the properties of foam in plaster slurry production involve offline sampling and testing, leading to delays and inconsistencies in large-scale production processes, especially when multiple foam feeds are involved.
Innovation Solution
An apparatus and method utilizing inline mass flow meters and control systems to measure and adjust the density and mass flow rate of foam and plaster slurry, incorporating sensors and a PID controller to ensure consistent product quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If offline sampling and testing methods are used to monitor foam properties, then device complexity is reduced, but productivity decreases due to delays in detecting and correcting inconsistencies
Solution Approach 1:
The patent replaces offline mechanical sampling and testing systems with an inline mass flow meter system that uses electromagnetic or other non-contact measurement principles to detect foam density and flow rate in real-time, eliminating the need to stop production for sampling and analysis
Solution Approach 2:
The patent introduces a mass flow meter as an intermediary measurement device that directly interfaces with the foam flow stream, providing real-time data without requiring physical sampling or disruption of the production process
2Loss of time
If offline sampling methods are used, then measurement system complexity is reduced, but loss of time increases due to delays between sample selection and testing results
Solution Approach 1:
The patent implements real-time measurement before foam properties can deviate from specifications, allowing preventive control rather than reactive correction after defects have occurred during production
Solution Approach 2:
The patent establishes a closed-loop feedback system where real-time mass flow meter measurements are continuously monitored and fed back to control processes, enabling immediate adjustment of foam generation parameters to maintain consistent quality
3Productivity
If multiple foam feeds are processed simultaneously, then productivity increases, but difficulty of detecting and measuring increases due to the complexity of monitoring multiple streams
Solution Approach 1:
The patent applies separate mass flow meters to each individual foam feed stream, allowing independent measurement and control of each stream's properties while maintaining overall high productivity through parallel processing
Solution Approach 2:
The patent uses identical mass flow meter technology across all foam feed streams, providing a universal measurement solution that simplifies operation and maintenance while enabling simultaneous monitoring of multiple streams
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 real-time monitoring and adjustment of foam properties, reducing delays and ensuring uniformity in plaster slurry production, allowing for rapid detection and correction of inconsistencies.
Implementation Method 1
a mass flow meter configured to measure the density and mass flow rate of the foam within the foam conduit or the plaster slurry within the outlet conduit
Data Source
AI summary
An apparatus (100) for the production of a plaster slurry is described, the apparatus (100) comprising a mixer (102) for mixing at least plaster and water to form a plaster slurry, the mixer (102) comprising an outlet conduit (122), a foam generator (106) for mixing at least air, a foaming agent and water to produce a foam, the foam generator (106) in fluid communication with the mixer (102) via a fluid pathway (116) comprising a foam conduit (117); and a mass flow meter (124), wherein the mass flow meter (124) is configured to measure the density and mass flow rate of the foam within the foam conduit (117) or the plaster slurry within the outlet conduit (122). Additionally, a method of manufacturing a plaster slurry is described.