Wood Conditioning System Using Counter-Flow Water Spray
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Solution Overview
Problem
Existing wood conditioning methods for ply and veneer production are energy-intensive and generate significant waste, with steam-based methods being more efficient but still consuming large amounts of energy and producing sewage that requires treatment.
Innovation Solution
A wood conditioning system comprising a first chamber and a second chamber, with an air conveyor device circulating air between the chambers and a water spraying device in the second chamber that sprays warmer water against the direction of the circulated air, optimizing energy utilization and incorporating secondary energy from other wood processing stages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If steam is used for conditioning wood logs, then heat transfer efficiency is improved, but energy consumption increases and sewage is generated
Solution Approach 1:
The invention changes the physical state parameter of water from steam (gas phase) to liquid water, and adjusts the temperature parameter to moderate levels (below boiling point). This resolves the contradiction by achieving effective heat transfer through liquid water evaporation and convection without the high energy input required for steam generation, thereby reducing energy consumption while maintaining heat transfer efficiency
Solution Approach 2:
The invention utilizes the phase transition of water from liquid to vapor during the conditioning process. Water is sprayed as liquid and then evaporates to absorb heat from the logs, providing efficient heat transfer without requiring pre-generation of steam. This natural phase transition occurs at moderate temperatures, reducing energy consumption compared to steam-based systems
2Use of energy by moving object
If steam is used for conditioning wood logs, then heat transfer efficiency is improved, but sewage generation increases
Solution Approach 1:
By changing from steam to liquid water at moderate temperatures, the invention eliminates the need for high-temperature boilers and condensate collection systems. The moderate temperature water used in the process does not generate harmful sewage requiring treatment, thus resolving the contradiction between heat transfer efficiency and sewage generation
3Device complexity
If water basin method is used for conditioning, then equipment complexity is reduced, but wood moisture becomes excessive and waste increases
Solution Approach 1:
The invention employs hydraulic spraying systems to deliver controlled amounts of liquid water to the logs through nozzles. This hydraulic approach provides precise water application control, preventing excessive moisture uptake by the wood while maintaining simplicity of equipment. The controlled spray system avoids the waterlogging problem of immersion methods, reducing wood waste
4Use of energy by moving object
If water is sprayed against air flow direction, then heat and moisture transfer to wood is improved, but system complexity increases
Solution Approach 1:
The invention creates a dynamic interaction between the sprayed water and the air flow within the chamber. Water is sprayed against the air flow direction, creating turbulence and enhanced mixing that improves heat and moisture transfer to the logs. This dynamic approach achieves superior heat transfer efficiency without requiring complex additional equipment, as the effect is achieved through the interaction of existing air circulation and water spray systems
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 system enhances energy efficiency by utilizing secondary energy and reduces waste by maintaining moderate water temperatures, thereby improving the overall energy balance and environmental impact of wood conditioning processes.
Implementation Method 1
at least one air conveyor device for circulating air between the first chamber and the second chamber
Implementation Method 2
spraying warmer water against the direction of the circulated air
Implementation Method 3
The steam is also heated so that the heat may be transferred to the logs in the chamber
Data Source
AI summary
The invention relates to a wood conditioning system comprising: a first chamber; a second chamber; at least one air conveyor device for circulating air between the first chamber and the second chamber; the second chamber comprising at least one device for spraying water substantially against a direction of the circulated air. Some aspects of the invention relate to a method for wood conditioning.