Steam-Heated Mixer Drum for High-Temperature Indirect Heating
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Solution Overview
Problem
Conventional mixers have limitations in achieving high temperatures due to indirect heating methods using water or oil as transfer media, which restricts the heat transfer and are cumbersome to maintain and clean.
Innovation Solution
A mixer design featuring a drum with a mid-section and end-sections that are indirectly heated with condensing steam, where the condensate is collected and removed without moving parts, allowing for increased temperature reach and simplified maintenance, with internal mixing means that can also be heated and feature steam inlets and condensate outlets for efficient heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If water or oil is used as heating medium in indirect heating, then the mixer can be heated, but the maximum temperature is limited and heat transfer is restricted
Solution Approach 1:
The patent changes the heating medium from liquid (water or oil) to gas (steam), which fundamentally alters the heating parameters and enables higher temperature operation while maintaining indirect heating configuration
Solution Approach 2:
The patent utilizes the phase transition of steam condensing to heat the drum, allowing efficient heat transfer at high temperatures without direct contact between heating medium and product, thereby resolving the temperature limitation of liquid heating media
2Ease of manufacture
If conventional indirect heating with water or oil is used, then heating is achieved, but maintenance and cleaning become cumbersome
Solution Approach 1:
The patent extracts the heating medium from direct contact with the product space by using steam that condenses on the external surface of the drum, separating the heating function from the product containment space and enabling easier cleaning of both systems
Solution Approach 2:
The steam heating system operates automatically without requiring manual intervention for heating or condensate removal, reducing maintenance requirements while maintaining reliable high-temperature heating capability
3Temperature
If steam is used as heating medium, then higher temperatures are achieved, but condensate removal becomes challenging
Solution Approach 1:
The patent employs a rotating drum configuration where the collection pipe is positioned to utilize gravity and rotational motion for automatic condensate removal, transforming the static condensate collection problem into a dynamic self-draining system that operates continuously during drum rotation
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
The design enables the mixer to reach higher temperatures than conventional mixers, reduces maintenance needs, and allows for efficient heat transfer without direct contact between the heating medium and the product, enhancing the mixing process while maintaining a simple construction.
Implementation Method 1
the drum is indirectly heated with steam which condenses at least partially
Implementation Method 2
the heating medium does not get into contact with the product to be mixed... the steam condenses at least partially
Data Source
AI summary
The present invention relates to a mixer with a drum that comprises a mantle, a bottom and a top and which rotates around an axis of rotation.