Steam Dryer Drum Compartmentalization and Rotating Pipes
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Solution Overview
Problem
Existing steam dryers face issues such as low efficiency, abrasive wear of steam pipes, and exposure of critical components to corrosive vapors, leading to maintenance challenges and limited capacity for drying large quantities of materials.
Innovation Solution
The steam dryer design includes a stationary end chamber at the discharge end to protect the steam distributor manifold and flexible hoses from corrosive vapors, and divides the drum into compartments to increase the contact area between steam pipes and wet material, allowing for easier maintenance and higher efficiency by rotating the drum and steam pipes during operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the drum is filled to a high degree to increase productivity, then the drying capacity increases, but the steam pipes experience intensive abrasive wear from the material
Solution Approach 1:
The drum is divided into multiple compartments by partition walls, creating separate drying zones. This segmentation allows the steam pipes to be positioned in optimal locations within each compartment, maximizing material contact while distributing wear across different sections. The compartments enable independent optimization of steam pipe placement in each zone.
Solution Approach 2:
The steam pipes are made rotatable along with the drum, transforming them from stationary components to dynamic elements. This rotation reduces the pressure differential between the moving material and the pipes, significantly decreasing abrasive wear while maintaining effective drying contact throughout the drying cycle.
2Device complexity
If the steam distributor manifold and flexible hoses are positioned inside the drum to simplify structure, then the device complexity is reduced, but these components are exposed to corrosive vapors causing maintenance challenges
Solution Approach 1:
The steam distributor manifold and flexible hoses are extracted from the interior of the drum and positioned in the discharge end chamber. This separation removes these components from the corrosive vapor environment inside the drum, reducing corrosion and making them easily accessible for maintenance and replacement without disassembling the drum structure.
3Reliability
If longitudinal steam pipes are used to reduce wear, then the abrasive wear decreases, but the filling degree of the drum remains low limiting productivity
Solution Approach 1:
The steam pipe arrangement transitions from purely longitudinal to a three-dimensional configuration incorporating transverse intermediate pipes that connect longitudinal pipes. This spatial expansion allows steam pipes to extend into the radial dimension, increasing the effective contact area with material in all directions while maintaining the rotational movement that reduces wear.
Solution Approach 2:
Multiple steam pipes are arranged concentrically and interconnected through transverse pipes, creating a nested configuration. This allows maximum utilization of the drum's internal volume with steam pipes positioned at different radial distances, optimizing both material contact and wear reduction through 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
This design enhances drying efficiency, reduces maintenance needs, and extends the service life of the dryer by minimizing abrasive wear and allowing for easy access to components, while improving the filling degree and capacity for handling larger quantities of materials.
Implementation Method 1
steam pipe elements each of which comprises two axial pipes parallel to a longitudinal direction of the drum and interconnected by a plurality of longitudinally spaced transverse intermediate pipes
Implementation Method 2
Steam dryer for evaporating of water and/or other liquid from wet materials
Implementation Method 3
the steam intended for drying is made to flow in pipes fitted inside the drum
Data Source
Figure 1
Figure 2~5
AI summary
The invention concerns a steam dryer for evaporating of water and/or other liquid from wet materials or evaporating of materials in a liquid state. The dryer (10) comprises a cylindrical rotatable drum (11) having a shell (12) and provided with a feed end (14) delimited by a feed end plate (15), and a discharge end (16) closed by a discharge end plate (17). A plurality of steam pipe elements (26) are inserted in the drum (11). Each steam pipe element (26) comprises axial pipes (27) parallel to a longitudinal direction of the drum (11) and interconnected by transverse intermediate pipes (28). The steam pipe elements (26) are rotatable with the drum (11). A stationary end chamber (18) and a steam distributor manifold (21) are arranged at the discharge end area of the drum (11). Conveyance means (22) are disposed at the feed end (14) of the drum (11) for supplying the wet materials or the materials in a liquid state into the steam dryer (10) for evaporating. The stationary end chamber (18) is arranged at the discharge end area of the drum (11) in the axial direction between the discharge end plate (17) and the feed end plate (15) such that the discharge end plate (17) is situated outside of the discharge end chamber (18). The discharge end chamber (18) surrounds a portion of the drum (11) and it has a lower opening (19) to discharge dried material or remaining liquid and an upper opening (20) to discharge vapour from the drum (11). The steam distributor manifold (21) is arranged at the discharge end (16) of the drum (11) outside of the discharge end plate (17) to supply the steam pipe elements (26) with steam and to remove condensate formed in the steam pipe elements (26).