Cross-Flow Shredder Air Recirculation for Dust-Free Discharge
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Solution Overview
Problem
Existing material comminution devices suffer from dust generation and air contamination due to the discharge of air flows with material, leading to inefficient and dusty operating conditions.
Innovation Solution
A cross-flow shredder with integrated dust-tight conveying systems, including screw conveyors and a dust-tight intermediate bunker, combined with an air recirculation system through a hose or pipe connection, controls air flow and prevents dust escape, using a control mechanism for the discharge opening based on material fill level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If air flow is discharged with material from the shredder, then material discharge is achieved, but dust generation and air contamination occur
Solution Approach 1:
An intermediate bunker is introduced as a mediator between the shredder and the external environment. The bunker receives comminuted material and air flow, isolates them temporarily, and enables controlled discharge through a closed system with a closing mechanism, preventing direct discharge of dusty air while maintaining material flow capability
Solution Approach 2:
The intermediate bunker creates a sealed, inert environment that isolates the comminuted material and air flow from the external atmosphere. The closed system with controlled discharge openings prevents dust escape while allowing material processing to continue, effectively creating a dust-free zone
2Productivity
If air flow is discharged with material, then material discharge is achieved, but static pressure buildup occurs
Solution Approach 1:
The intermediate bunker acts as a pressure-regulating intermediary that receives air flow from the shredder and manages it through controlled discharge openings. The closing mechanism allows selective opening to release built-up pressure while maintaining the sealed environment, preventing excessive static pressure accumulation
Solution Approach 2:
The system transitions from a static sealed system to a dynamically controlled one. The closing mechanism at the discharge opening can open or close based on operational requirements, allowing the system to dynamically regulate pressure and air flow while maintaining material discharge efficiency
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
Achieves nearly dust-free operation by recirculating air flow, preventing static pressure buildup, and enhancing material discharge efficiency, particularly with light materials.
Implementation Method 1
two screw conveyors (4) for conveying the material to be comminuted
Implementation Method 2
the intermediate bunker (5) being connected to the cross-flow shredder (3) via a hose or pipe system (6), the air flow generated in the intermediate bunker (5) being returned to the cross-flow shredder (3)
Implementation Method 3
a cross-flow shredder (3) for comminuting material to be ground
Data Source
AI summary
The present disclosure relates to a cross-flow shredder for grinding material with integrated dust-tight conveying means and air recirculation, and a method for grinding material using the cross-flow shredder according to the disclosure. An apparatus and a method for comminuting material to be ground are disclosed, the apparatus comprising a feed opening for material to be ground, a feed device, a cross-flow shredder, two screw conveyors for conveying the material to be ground and an intermediate dust-tight bunker, the two screw conveyors being connected in a dust-tight manner to the cross-flow shredder on the respective feed side and in a rod-tight manner to the intermediate bunker on the discharge side, the intermediate bunker being connected to the cross-flow shredder via a hose or pipe system, and the intermediate bunker having a discharge opening closed by a slide valve.