Horizontal Rotary Pyrolysis Kiln Sealing Structure
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Solution Overview
Problem
Existing sealing technologies for horizontal rotary pyrolysis kilns, such as fish-scale-type and flexible connection with rubber sealing, fail to provide complete sealing, leading to safety hazards and limited durability due to short service life.
Innovation Solution
A sealing structure featuring a rotary sealing mechanism with shifting forks, a movable heat-insulation sealing ring, and a flexible sealing mechanism, which forms a heat-insulation cavity to reduce ambient temperature and prevent torsional stress, using a gas loading pipeline to maintain pressure greater than pyrolysis coal gas pressure, and a compression mechanism to ensure tight attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If flexible connection and rubber sealing are used, then complete sealing is achieved, but service life is short due to limited durability
Solution Approach 1:
The sealing system is divided into multiple independent components: a rigid rotary sealing mechanism for structural support and positioning, and a flexible sealing mechanism for actual sealing contact. This segmentation allows each component to perform its specialized function optimally, with the rigid part providing stability and the flexible part providing adaptive sealing, thereby extending overall service life while maintaining sealing effectiveness.
Solution Approach 2:
A heat-insulation cavity is introduced as an intermediary structure between the high-temperature kiln environment and the flexible sealing mechanism. This cavity acts as a thermal barrier, protecting the flexible sealing components from direct exposure to high temperatures and harsh chemical environments,ไป่ significantly extending their service life while preserving sealing performance.
2Device complexity
If fish-scale-type sealing is used, then structural simplicity is maintained, but complete sealing cannot be achieved leading to safety hazards
Solution Approach 1:
The invention merges the advantages of both rigid structural sealing and flexible adaptive sealing into a unified system. The rotary sealing mechanism provides the rigid framework for complete enclosure, while the flexible sealing mechanism fills the gaps and adapts to dimensional variations. This combination achieves complete sealing reliability without excessive complexity, as each subsystem is relatively simple but their synergistic integration delivers superior performance.
3Speed
If the flexible sealing mechanism is exposed to high temperature, then sealing response is fast, but material degradation occurs reducing service life
Solution Approach 1:
The heat-insulation cavity serves as a thermal intermediary that decouples the sealing mechanism from the high-temperature environment. The cavity wall acts as a thermal barrier, allowing the flexible sealing mechanism to operate at lower temperatures while still maintaining rapid sealing response capability. This protects the sealing materials from thermal degradation and extends their service life without compromising their functional response speed.
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 structure effectively prolongs the service life of the flexible sealing mechanism by reducing heat dissipation and maintaining sealing effectiveness, while preventing pyrolysis coal gas from entering the heat-insulation cavity, ensuring safety and environmental protection.
Implementation Method 1
The heat-insulation cavity can effectively block the heat dissipated from the kiln tail cover and the kiln tail, thereby effectively reducing the ambient temperature of the flexible sealing mechanism in the heat-insulation cavity
Implementation Method 2
using a gas loading pipeline to maintain pressure greater than pyrolysis coal gas pressure, and a compression mechanism to ensure tight attachment
Data Source
AI summary
Provided is a sealing structure for a horizontal rotary pyrolysis kiln. A movable heat-insulation sealing ring is disposed such that a heat-insulation cavity is formed between the movable heat-insulation sealing ring and a flexible sealing mechanism. The heat-insulation cavity can effectively block the heat dissipated from a kiln tail cover and a kiln tail, thereby effectively reducing the ambient temperature of the flexible sealing mechanism in the heat-insulation cavity. In this way, the service life of the flexible sealing mechanism is prolonged, and the effectiveness of sealing is thus ensured.