Microwave Curing of Mineral Wool Pipe Insulation
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Solution Overview
Problem
The existing methods for curing mineral wool pipe insulation sections require extensive energy consumption, result in atmospheric emissions, and necessitate regular maintenance due to the use of gas burner-generated heat and air blowing systems, which compromises insulation quality.
Innovation Solution
The use of microwave irradiation for curing mineral wool pipe insulation sections, employing a steel core that heats up and distributes microwave energy uniformly throughout the insulation, eliminating the need for extensive air pipe systems and reducing energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If gas burner-generated heat and air blowing system are used for curing mineral wool, then curing can be achieved, but energy consumption increases and atmospheric emissions occur
Solution Approach 1:
The patent replaces the mechanical air blowing system and gas burner heating system with a microwave irradiation system. The microwave generator directly heats the mineral wool through dielectric heating, eliminating the need for extensive air pipe systems, blowers, and gas burners, thereby reducing energy consumption and atmospheric emissions.
Solution Approach 2:
The patent changes the heating method from conventional thermal conduction (gas burner) and convection (air blowing) to microwave dielectric heating. This parameter change in the heating mechanism allows for more efficient energy transfer directly to the mineral wool, reducing overall energy consumption and eliminating combustion-related emissions.
2Temperature
If air is blown through mineral wool for curing, then heating can be achieved, but fiber re-orientation occurs creating air channels that undermine insulation capacity
Solution Approach 1:
The patent replaces the air blowing system with microwave irradiation. The microwave energy penetrates the mineral wool and heats it uniformly through dielectric heating without causing fiber movement or re-orientation. This maintains the random fiber arrangement essential for high insulation performance while achieving the required curing temperature.
3Temperature
If gas burner and air pipe system are used for curing, then heating function is provided, but device complexity increases due to extensive pipe system
Solution Approach 1:
The patent replaces the complex mechanical system of gas burners, air pipes, and blowers with a compact microwave generator and waveguide system. This substitution dramatically simplifies the apparatus structure while maintaining the ability to provide the necessary curing temperature to the mineral wool.
4Productivity
If air pipe system and blowers are used for curing, then heating and air movement are achieved, but regular maintenance and cleaning are required
Solution Approach 1:
The patent replaces the air pipe system and blowers with a microwave generator system that has no moving parts or extensive piping. The microwave system requires no regular cleaning or maintenance of air passages, eliminating the productivity losses associated with maintenance shutdowns while maintaining continuous production capability.
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 approach simplifies the section forming apparatus, reduces energy consumption, minimizes emissions, and enhances insulation quality by ensuring uniform curing without air channels, thereby improving product performance and reducing maintenance needs.
Implementation Method 1
While not wishing to be bound by theory, we believe that the reason why steel cores heat up by microwave irradiation is the ferromagnetism of steel.
Implementation Method 2
the steel core both heats up in response to microwave radiation and reflects microwaves
Implementation Method 3
in the curing of pipe insulation microwave irradiation is used
Data Source
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AI summary
The invention relates to an apparatus and method for forming pipe insulation sections of mineral wool. The apparatus features a section curing portion with one or more outer molds (31, 32) cylindrical in terms of their internal surface. The curing portion further includes a core (51, 52) installed inside each mold or capable of being installed therein or removed therefrom. In connection of each outer mold are provided first elements for heating the outer mold at least over its internal surface, and second elements (61, 62; 11, 12; 21, 22) for irradiating a mineral wool section installed in the mold with microwaves, said core having been made from some material capable of heating up in response to microwave irradiation.