Infrared Fabric Shrinking for Safe Filter Installation Without Steam
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Solution Overview
Problem
The existing methods for installing synthetic filter fabrics on filtering surfaces, such as drum and disc filters, are hazardous due to the use of hot water and steam, and can be time-consuming and complex, especially during mill shutdowns or when steam lines are unavailable, leading to potential fabric damage and service life issues.
Innovation Solution
A method utilizing an infrared radiation-based apparatus to heat the synthetic filter fabric to a controlled temperature of 100 to 160 °C, allowing for safe, fast, and efficient shrinking without the need for hot water or steam, featuring adjustable temperature measurement and uniform heating configurations to ensure firm attachment to the filtering surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hot water and steam are used for shrinking the filter fabric, then the fabric can be shrunk to fit the filtering surface, but dangerous situations and serious injuries to employees can occur
Solution Approach 1:
The patent replaces the thermal field system (hot water and steam) with an infrared radiation heating system. The infrared heating apparatus directly heats the filter fabric through radiation, eliminating the need for hot water immersion and steam exposure, thus resolving the contradiction between achieving fabric shrinkage and preventing employee injuries from hot water and steam
Solution Approach 2:
The patent introduces infrared radiation as an intermediary heating method between the heat source and the filter fabric. Instead of directly exposing employees to hot water and steam, the infrared apparatus acts as an intermediary that transfers thermal energy safely and controllably to shrink the fabric without the harmful effects of conventional methods
2Reliability
If hot water and steam are used for shrinking, then the fabric can be installed on the filter surface, but the method cannot be used when the mill is shut down and thus without hot water and steam
Solution Approach 1:
The patent extracts the dependency on mill's hot water and steam infrastructure by introducing a standalone infrared heating apparatus. This portable device can be deployed independently without requiring the mill's thermal infrastructure, enabling fabric installation during mill shutdowns and improving adaptability to different operating conditions
Solution Approach 2:
The infrared heating apparatus serves multiple functions: it can heat the filter fabric for shrinkage, it can be used during mill shutdowns when hot water and steam are unavailable, and it provides a universal solution that doesn't depend on specific plant infrastructure, thereby enhancing the versatility of the fabric installation process
3Productivity
If there is no time to replace the filter fabric shortly after the mill start-up, then the fabric cannot be replaced, but using hot water and steam requires time for heating and shrinking
Solution Approach 1:
The infrared heating apparatus can be moved sequentially along the filter fabric, applying periodic heating zones that shrink the fabric progressively. This periodic action allows rapid processing without requiring prolonged exposure of the entire fabric to high temperatures, reducing the overall time required for fabric replacement
Solution Approach 2:
The filter fabric can be pre-heated or pre-positioned using the infrared apparatus before final installation. This preliminary action prepares the fabric for rapid attachment to the filtering surface, reducing the critical time required during mill start-up and improving overall productivity
4Adaptability or versatility
If metal fabric is used for filtering, then the fabric can be used without hot water and steam, but installation is very complex and slow process requiring welding and grinding
Solution Approach 1:
The patent changes the material parameter from metal fabric to synthetic filter fabric that is responsive to infrared heating. This parameter change enables the fabric to be shrunk and attached through thermal contraction rather than welding, dramatically simplifying the installation process while maintaining adaptability to operations without steam lines
Solution Approach 2:
The patent replaces the mechanical joining system (welding and grinding required for metal fabric) with a thermal shrinking system using infrared radiation. This substitution eliminates complex installation procedures while achieving secure fabric attachment, resolving the contradiction between versatility and installation complexity
5Reliability
If too hot water and/or steam are used, then the fabric can be shrunk, but holes can be burned to the fabric
Solution Approach 1:
The infrared heating apparatus incorporates temperature sensing and control systems that provide feedback during the heating process. This feedback mechanism monitors the fabric temperature and adjusts the infrared radiation intensity accordingly, ensuring uniform shrinkage without exceeding the threshold that would cause fabric damage or hole formation
Solution Approach 2:
The infrared heating system applies localized heating zones that can be precisely controlled in terms of temperature and duration. This local quality control ensures that each portion of the fabric receives exactly the thermal energy needed for shrinkage without overheating, maintaining fabric integrity while achieving firm attachment
6Object-affected harmful factors
If too cold water and/or steam are used, then the fabric safety is maintained, but the fabric leaves loose
Solution Approach 1:
The infrared heating apparatus employs dynamic heating control that adjusts the radiation intensity and exposure time based on real-time feedback. This dynamic approach ensures that sufficient thermal energy is delivered to achieve proper fabric shrinkage and secure attachment, while the controlled nature of the heating prevents fabric damage, resolving the contradiction between attachment security and damage prevention
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 safe and rapid installation of synthetic filter fabrics during mill shutdowns, reduces the risk of fabric damage, and simplifies the process by eliminating the need for welding and grinding, ensuring a secure and long-lasting attachment to the filtering surface.
Implementation Method 1
heating the synthetic filter fabric to a temperature of 100 to 160 °C by an apparatus
Data Source
Figure 1~2
AI summary
According to an example aspect of the present invention, there is provided an apparatus (1) comprising at least one infrared element arrangement comprising at least one infrared element (3) comprising a plurality of infrared radiators (4), wherein the apparatus (1) is configured to heat a synthetic filter fabric (6) to a temperature of 100 to 160 °C for shrinking the fabric (6) on a filtering surface (5).