Drop Bar Brush Sealing for Furnace Pallet Car Gaps
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Solution Overview
Problem
Existing machines for thermal treatment of bulk material suffer from gaps between pallet cars and the furnace, leading to dust and hazardous gas escape, and tramp air entry.
Innovation Solution
A sealing system comprising one or more drop bars with brushes, arranged along the traveling direction of pallet cars, to cover the gap between the furnace support structure and the pallet cars, ensuring efficient sealing even on uneven surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a gap is defined between the pallet cars and the furnace support structure, then the pallet cars can travel freely through the furnace, but dust and hazardous gases escape and tramp air enters the furnace
Solution Approach 1:
The patent employs flexible sealing elements including brushes, flexible strips, and curtains that can deform and adapt to the moving pallet cars while maintaining continuous contact to seal the gap, preventing dust and gas escape while allowing free movement
Solution Approach 2:
The patent introduces intermediary sealing components such as drop bars with brushes and flexible curtains that act as mediators between the stationary furnace support structure and the moving pallet cars, creating an effective seal without restricting movement
2Reliability
If a rigid sealing system is used to seal the gap, then sealing efficiency improves, but the system cannot adapt to uneven surfaces and reduced durability
Solution Approach 1:
The patent employs dynamic sealing elements such as flexible strips, curtains, and brush assemblies that can move and deform to maintain contact with uneven surfaces, ensuring consistent sealing efficiency while adapting to surface variations
Solution Approach 2:
The patent utilizes sealing materials with varying degrees of flexibility and compliance, allowing the sealing system to adapt its physical parameters to match surface irregularities while maintaining effective sealing
3Reliability
If conventional sealing systems are used, then some sealing coverage is achieved, but sealing efficiency and durability are insufficient
Solution Approach 1:
The patent employs composite sealing systems combining multiple materials and mechanisms - brushes with flexible strips, metal drop bars with polymer coatings, and layered curtain structures - to achieve both high sealing efficiency and extended durability
Solution Approach 2:
The patent incorporates wear-resistant coatings, protective shields, and redundant sealing elements that provide cushioning and protection against wear and damage before they occur, extending the service life of the sealing system
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 sealing system effectively prevents dust and hazardous gases from escaping while preventing tramp air from entering, enhancing fuel and power efficiency by up to 10% and providing a more durable and flexible seal.
Implementation Method 1
a brush arranged on the drop bar such that the brush is configured to be in engagement with the common engagement surface
Data Source
AI summary
The disclosure relates to a machine for thermal treatment of bulk material, comprising, a stationary furnace which presents a support structure, and a plurality of pallet cars traveling through the furnace, said plurality of pallet cars together defining, at a lateral side thereof, a common engagement surface which extends through the furnace, wherein a gap is defined between the support structure of the furnace and the common engagement surface, said gap having a gap length, the machine further comprising: a sealing system comprising: one or more drop bars, wherein each drop bar of the one or more drop bars includes a brush arranged on the drop bar such that the brush is configured to be in engagement with the common engagement surface such that the one or more drop bars covers the gap over at least parts of the gap length.