Adjustable Guide Plate and Turbine for Papermaking Energy Recovery
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Solution Overview
Problem
Existing energy recovery systems in papermaking processes are not adaptable to various papermaking apparatus geometries, stock compositions, and flow conditions, leading to suboptimal energy recovery efficiency.
Innovation Solution
An energy recovery apparatus with an adjustable guide plate and turbine position, coupled with a modular system, allows for precise alignment and adjustment to maximize energy recovery by optimizing momentum transfer from the ejected water stream to the turbine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed energy recovery apparatus is installed, then the structure is simple and easy to manufacture, but it cannot adapt to different papermaking apparatus geometries, stock compositions, and flow conditions, leading to suboptimal energy recovery efficiency
Solution Approach 1:
The guide plate is made adjustable relative to the turbine, allowing the system to dynamically adapt to different papermaking conditions. The guide plate can be repositioned to optimize alignment with the stock flow direction for various headbox positions, geometries, and fabric velocities, while the turbine itself remains a fixed structure.
Solution Approach 2:
The energy recovery apparatus is divided into separable modules: a turbine module and a guide plate module. This segmentation allows independent adjustment and optimization of each component. The guide plate module can be adjusted without affecting the turbine module, enabling adaptability to different conditions while keeping the overall structure relatively simple.
2Manufacturing precision
If the guide plate is fixed in position, then the apparatus is simpler to manufacture and install, but alignment with the papermaking equipment cannot be optimized, reducing energy recovery efficiency
Solution Approach 1:
The guide plate is designed with adjustable positioning capabilities, allowing it to be precisely aligned with the stock flow direction for different headbox geometries and positions. The adjustability enables high alignment precision without requiring custom manufacturing for each specific papermaking configuration.
Solution Approach 2:
The guide plate's position and orientation parameters can be changed to match different papermaking apparatus geometries. This allows the same guide plate design to be used across various configurations by adjusting its angular and positional parameters rather than manufacturing different components.
3Adaptability or versatility
If the turbine position is fixed, then the apparatus structure is simpler, but it cannot be adjusted for different fabric velocities and headbox geometries, leading to suboptimal momentum transfer
Solution Approach 1:
The turbine position is made adjustable to accommodate different fabric velocities and headbox geometries. The turbine can be repositioned to optimize its alignment with the stock flow direction for various operating conditions, maximizing momentum transfer efficiency across different papermaking configurations.
Solution Approach 2:
The turbine is separated into its own module that can be independently positioned and adjusted. This modular approach allows the turbine to be optimized for different conditions without complicating the overall apparatus structure, as the adjustment mechanisms are contained within the turbine module itself.
4Ease of repair
If the energy recovery apparatus is integrated as a single unit, then the structure is more compact, but maintenance and adjustments require shutdown of the papermaking machine
Solution Approach 1:
The energy recovery apparatus is divided into separable modules that can be independently removed and maintained. The guide plate module and turbine module can be detached without shutting down the papermaking machine, allowing maintenance personnel to service these components while the papermaking operation continues uninterrupted.
Solution Approach 2:
The modular design acts as an intermediary between the papermaking process and maintenance requirements. By separating the energy recovery components from the main papermaking line, the system enables maintenance activities on the guide plate and turbine without interfering with the continuous papermaking operation.
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 solution enhances energy recovery efficiency by allowing for precise alignment and adjustment of the guide plate and turbine, reducing net energy consumption in the papermaking process and facilitating maintenance while maintaining optimal performance across different papermaking conditions.
Implementation Method 1
Alignment may increase the efficiency of momentum transfer from the ejected water stream to the turbine
Implementation Method 2
a curved guide plate shaped to direct water ejected through the forming wire into the turbine
Data Source
Figure 1
Figure 2
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AI summary
Systems and methods provide for the recovery of energy during the fabrication of paper, tissue, board, and the like. Water ejected from a forming wire (132) driven by a forming roll (110) may be directed by a guide plate (150) into a turbine (140). The guide plate may be adjustable, providing for alignment of a terminal edge of the guide plate with an entry point of the turbine. An angle of the guide plate may be adjustable, enabling a smooth transition of flow from the forming roll to the turbine. A position of the turbine may be adjustable. A guide plate and/or a turbine may be mounted modularly (e.g., with a guide plate as part of a guide plate module and/or a turbine as part of a turbine module).