Adjustable Nozzle Plates for Uniform Drying in Multi-Tier Panel Dryers
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Solution Overview
Problem
Existing dryers for strip or panel-shaped products, such as gypsum boards, face challenges in achieving uniform drying across the entire width and height due to non-uniform air flow and cooling effects, particularly in compact multi-tier structures with small nozzle boxes, leading to inefficient heat transfer and drying results.
Innovation Solution
The implementation of adjustable blending plates on the inflow openings of nozzle boxes allows for individual adjustment of air inflow, ensuring uniform drying by reducing the opening area and using motorized mechanisms for precise control, with sensors for temperature and humidity feedback to optimize drying effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the dryer has a compact multi-tier structure with small nozzle boxes, then the dryer achieves a space-efficient design, but the air flow distribution becomes non-uniform and cooling effects increase
Solution Approach 1:
The patent applies local quality by making each nozzle box independently adjustable through individual adjusting plates. This allows each nozzle box to be optimized locally for its specific position in the stack, compensating for the non-uniform air flow and cooling effects that occur in compact multi-tier structures. The adjusting plates enable local modification of opening areas to achieve uniform drying across all levels.
2Device complexity
If the nozzle boxes are arranged in a stack-like manner with small cross-sectional dimensions, then the dryer structure becomes compact, but the air jet speed distribution becomes uneven
Solution Approach 1:
The patent implements dynamics by making the nozzle boxes adjustable through rotating adjusting plates. This dynamic adjustment capability allows the opening areas of individual nozzle boxes to be modified based on their position in the stack, compensating for the uneven air jet speed distribution that occurs in compact configurations. The system transitions from a static to a dynamically adjustable structure.
3Manufacturing precision
If the adjusting plates are provided for individual nozzle box adjustment, then the drying uniformity is improved, but the device complexity increases
Solution Approach 1:
The patent applies homogeneity by using identical adjusting plate mechanisms for all nozzle boxes. Each nozzle box is equipped with the same type of adjustable plate structure, which simplifies manufacturing and maintenance while achieving uniform drying across all levels. The homogeneous design of the adjustment mechanism reduces overall system complexity despite the increased number of adjustable components.
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 solution enhances air flow uniformity by up to 20% and compensates for flow differences between upper and lower nozzle boxes, resulting in improved drying efficiency and consistency across all levels of the dryer.
Implementation Method 1
Adjustable blend or adjusting plates are provided on the first partition wall, ie, where the inflow openings of the nozzle boxes are arranged, by means of which the openings of the nozzle boxes can be adjusted. This means that floors with nozzle boxes which are supplied with drying circulating air inside the dryer are partially closed by the adjusting plates on the opening side, so that the opening area available for the inflow of the air is reduced.
Implementation Method 2
sensors for temperature and humidity feedback to optimize drying effects
Implementation Method 3
sensors for temperature and humidity feedback to optimize drying effects
Implementation Method 4
the heat transfer from an impacting air stream to a plate to be dried is a function of the distance between the nozzle mouth and the plate
Data Source
AI summary
A dryer for drying a strip or panel-shaped product, in particular gypsum board or veneer panels, having a plurality of tiers, having an outer and an inner housing and an inner housing separated from the outer housing by a first and second partition wall, having conveying devices for conveying the product, upper and lower nozzle boxes arranged transversely to the conveying direction and extend over the width of the conveying devices between the dividing walls, have in each case one inflow opening on one end assigned to the first separating wall and are closed on the other end assigned to the second partition wall. Nozzle openings for blowing out drying air are present at least on one side of the product passing through. The dryer includes at least on the first partition wall adjustable adjusting plates wherein the inflow openings of the upper and lower nozzle boxes can be adjusted.