Biomass Drying Device with Horizontal Gas Flow
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Solution Overview
Problem
Existing devices for drying biomass, such as wood chips, are inefficient in reducing dust discharge and ensuring even drying, particularly when using hot air as a drying gas, which affects the moisture saturation and efficiency of the drying process in biomass gasification plants.
Innovation Solution
A device with a container and channel design that uses side openings for drying gas flow, allowing for horizontal gas flow to reduce dust discharge and enhance moisture saturation, featuring Z-shaped wall elements and adjustable angles to prevent biomass bridging, and incorporates a discharge system with movable wedge elements for efficient biomass removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If drying gas flows from below into the chamber, then drying speed is improved, but dust discharge increases
Solution Approach 1:
The patent inverts the conventional bottom-up drying gas flow direction by implementing side-wall openings that allow drying gas to flow horizontally through the biomass from side to side. This inversion of the flow direction simultaneously achieves effective drying while preventing dust discharge, as the horizontal flow does not entrain dust particles upward like vertical flow does.
Solution Approach 2:
The patent transitions from one-dimensional vertical flow (bottom to top) to two-dimensional horizontal flow through the biomass mass. By introducing side-wall openings and arranging biomass in layers with horizontal flow paths, the drying gas moves through another dimension (horizontally across the biomass rather than vertically through it), achieving both drying efficiency and dust control.
2Object-generated harmful factors
If drying gas flows horizontally through the chamber, then dust discharge is reduced, but drying efficiency decreases
Solution Approach 1:
The patent segments the drying chamber into multiple zones with side-wall openings distributed along the length of the chamber. This segmentation allows drying gas to be introduced at multiple points and flow through the biomass in a controlled horizontal path, increasing the total contact surface area and ensuring thorough drying while maintaining low dust discharge through the side openings.
Solution Approach 2:
The patent implements local quality by creating different flow conditions in different regions of the chamber. The side-wall openings are strategically positioned to create localized horizontal flow zones that penetrate the biomass mass, ensuring that each region receives adequate drying gas flow while collectively achieving high drying efficiency without dust discharge.
3Manufacturing precision
If side walls have multiple openings for drying gas flow, then drying uniformity is improved, but device complexity increases
Solution Approach 1:
The patent applies the porous materials principle by creating a wall structure with multiple openings that functions as a distributed flow distribution system. The side walls incorporate numerous openings of varying sizes that allow drying gas to pass through uniformly, achieving even drying across the biomass while the modular opening design keeps the structural complexity manageable.
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 device effectively reduces dust discharge, achieves even drying, and prevents biomass bridging, resulting in improved moisture removal and efficiency when using waste heat from biomass gasification plants for drying biomass, enhancing the overall performance of biomass gasification processes.
Implementation Method 1
a drying gas for drying the biomass contained therein can be supplied to a respective chamber
Implementation Method 2
Hot air, in particular with a temperature above 20°, preferably above 45°, can be used as the drying gas
Implementation Method 3
the drying gas stays in contact with the biomass for longer, improving drying. In other words, a higher moisture saturation of the drying air is achieved
Data Source
AI summary
The present invention provides a device (1) for drying bulk biomass (59), in particular wood chips, with a container (2) and a channel (10) which extends inside the container (2) and divides it into two chambers (11, 12) for receiving the biomass (59), wherein side walls (31, 32) of the channel (10) have openings (43) by means of which a drying gas (42) can be supplied to a respective chamber (11, 12) for drying the biomass (59) received therein.