Polymerization Sampling Valve With Key-Locked Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge in polymerization plants is safely withdrawing samples from units operating at pressures above atmospheric pressure, as existing methods do not effectively manage the pressure differential, potentially leading to unsafe sampling processes and equipment contamination.
Innovation Solution
An apparatus and method involving a sampling valve, control valves, and a flushing system, with a key-operated locking mechanism for control valves, allowing controlled sample collection and discharge, ensuring safe operation and minimizing contamination by maintaining pressure equilibrium and using a flushing system to clean conduits and valves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If samples are withdrawn from polymerization units operating at elevated pressure, then sample collection is enabled, but pressure safety and equipment contamination risks increase
Solution Approach 1:
The sampling system is divided into multiple isolated segments: the high-pressure sampling valve, intermediate buffer chamber, and low-pressure collection container. Pressure control valves create segmented pressure zones that allow safe transition from high to low pressure through controlled venting, preventing uncontrolled pressure release and equipment contamination.
Solution Approach 2:
An intermediate buffer chamber serves as a mediator between the high-pressure polymerization unit and the low-pressure collection container. This intermediary chamber allows pressure equalization and controlled decompression, acting as a safety buffer that prevents direct pressure differential exposure and reduces contamination risk.
2Reliability
If multiple control valves are used to manage pressure control, then pressure safety is improved, but device complexity increases
Solution Approach 1:
Multiple pressure control functions are merged into a single integrated sampling valve assembly that incorporates the sampling valve, buffer chamber, and pressure control mechanisms. This consolidation maintains the required pressure safety through multiple control points while reducing operational complexity by providing unified control and a single-point connection to the polymerization unit.
3Object-affected harmful factors
If a flushing system is added to prevent contamination, then equipment contamination is reduced, but device complexity and operation time increase
Solution Approach 1:
The flushing system performs preliminary cleaning of the sampling valve and conduits before sample collection begins. By pre-flushing the system with inert gas or cleaning fluid, potential contamination sources are removed in advance, ensuring sample purity without requiring extended flushing operations after sampling starts, thus minimizing additional time loss.
Data Source
AI summary
An apparatus and a method to withdraw samples from a polymerization plant using a defined sequence of steps combined with locking devices for valves opened by a single key.