Pharmaceutical Unit Filter Switching to Prevent Decontaminant Binding
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Solution Overview
Problem
In pharmaceutical production facilities with high dust and aerosol loads, the effectiveness of decontamination is compromised due to the binding of decontaminants like hydrogen peroxide in filter systems, leading to incomplete decontamination and potential non-compliant operation, especially in barrier systems used in powder-processing units.
Innovation Solution
A pharmaceutical unit with a filter system featuring a first flow path and a switching device that directs air through a first filter during operation and exclusively through a second filter during decontamination, bypassing the first filter to ensure the decontaminant is fully available for the decontamination process, thereby preventing decontaminant binding and maintaining reproducible effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single filter system is used in recirculated air during operation, then filtration is provided, but decontamination effectiveness is reduced due to decontaminant binding in the filter
Solution Approach 1:
The filter system is segmented into a first filter for operation phase and a second filter for decontamination phase. The switching device directs air flow exclusively through the first filter during operation and exclusively through the second filter during decontamination, preventing decontaminant binding in the first filter and ensuring decontamination effectiveness.
Solution Approach 2:
The system dynamically switches between two operational modes: during operation, air flows through the first filter; during decontamination, air flows exclusively through the second filter. This dynamic switching prevents decontaminant binding in the first filter while maintaining filtration capability.
2Reliability
If decontaminant is introduced into recirculated air, then decontamination of the working space is achieved, but decontaminant is bound in dust-laden filters reducing availability
Solution Approach 1:
The decontamination function is extracted from the first filter and assigned to a separate second filter. During decontamination, air flows exclusively through the second filter, taking the decontaminant binding problem out of the primary filtration path and ensuring full decontaminant availability.
Solution Approach 2:
The second filter acts as an intermediary during decontamination, receiving air flow exclusively and preventing decontaminant binding. This intermediary filter protects the decontaminant from being bound in the dust-laden first filter.
3Reliability
If filters are operated continuously without switching, then simple operation is maintained, but decontamination validation becomes unreliable after several hours of operation
Solution Approach 1:
The system prepares for decontamination in advance by having a dedicated second filter ready. Before decontamination begins, the switching device is configured to direct air flow exclusively through the second filter, ensuring the first filter is bypassed and decontaminant binding is prevented from the start.
Solution Approach 2:
The system changes the flow path parameter dynamically: during operation, air flows through the first filter; during decontamination, air flows exclusively through the second filter. This parameter change ensures reliable decontamination validation while maintaining operational simplicity through automated switching.
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 ensures maximum reproducible effectiveness of the decontamination process by keeping the decontaminant available and preventing its binding in the first filter, thus maintaining compliance and ensuring thorough decontamination even after recirculation.
Implementation Method 1
The first filter (18) is arranged in the first flow path (11). The first filter (18) is designed to filter air from the working space (16).
Implementation Method 2
The switching device (22) is designed to direct air from the working space (16) via the first flow path (11) and thus via the first filter (18) during an operating phase of the pharmaceutical unit (12). The switching device (22) is further designed to direct air from the working space (16) exclusively via the second flow path (13) during a decontamination phase of the pharmaceutical unit (12).
Data Source
AI summary
The invention relates to a pharmaceutical unit (12) and to a method for operating a pharmaceutical unit (12).