Suspended Radiative Heating Elements for Furnace Tube Temperature Control
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Solution Overview
Problem
Existing electrically heated reactors face issues with prolonged interruptions and high costs due to premature failure or aging of heating elements, particularly in large-scale units, and potential domino effects from broken heating elements, leading to production losses and unwanted by-products.
Innovation Solution
An electrically heated apparatus with suspended radiative heating elements that can be easily replaced without shutting down the furnace, featuring a roof with a configured shape allowing elements to suspend at different heights for comprehensive tube heating and precise temperature control, reducing by-product formation and extending operation times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heating elements are fixed in the furnace space, then structural stability is improved, but replacement requires shutdown and entry into furnace space causing production loss
Solution Approach 1:
The heating element system is segmented into modular units that can be independently replaced. Each heating element is designed as a separate replaceable module with standardized mounting interfaces, allowing individual elements to be swapped without affecting the entire heating system or requiring furnace shutdown.
Solution Approach 2:
The replacement approach transitions from horizontal/vertical access dimensions to a dimensional approach where elements are accessible through the roof opening. The roof opening provides a new access dimension that allows element replacement without entering the furnace space through side openings, maintaining structural stability while enabling easy maintenance.
2Temperature
If heating elements are made from brittle ceramic material, then high temperature resistance is improved, but breakage causes domino effect impacting other heating elements
Solution Approach 1:
The system incorporates protective measures before breakage can occur. The modular design with individual mounting for each heating element prevents domino effects - if one element breaks, it falls independently without impacting adjacent elements. The standardized mounting structure provides a controlled environment that minimizes the risk of cascading failures.
Solution Approach 2:
Heating elements are segmented into independent modular units with individual mounting structures. This segmentation ensures that if one ceramic heating element breaks, the failure is isolated to that single element without affecting other heating elements, preventing the domino effect described in the problem.
3Ease of manufacture
If heating elements are placed at uniform height, then installation simplicity is improved, but tube heating coverage is insufficient for full length heating
Solution Approach 1:
The heating system transitions from uniform heating at a single height to localized heating zones at different heights. Each heating element is positioned at a specific height to target particular sections of the tube, creating locally optimized heating zones. This allows precise temperature control for different tube segments while maintaining relatively simple installation through standardized mounting adapters.
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
Enables continuous operation with reduced by-product formation and longer apparatus lifespan by allowing in-situ replacement of heating elements, minimizing production losses and maintaining high efficiency in large-scale applications.
Implementation Method 1
electrical radiative heating elements which heating elements heat the at least one tube
Implementation Method 2
electrical radiative heating elements located in the space, which heating elements heat the at least one tube
Data Source
AI summary
The present invention provides an electrically heated apparatus (1), at least comprising: —an electrically heated furnace (2) having a roof (2A) and walls defining a space (3); —at least one tube (10) miming through the space (3), wherein the at least one tube (10) has an inlet (11) and an outlet (12) outside of the space (3); —electrical radiative heating elements (20) located in the space (3), which heating elements (20) can heat the at least one tube (10); wherein the heating elements (20) suspend from the roof (2A) of the space (3); and wherein the roof (2A) of the space (3) has a shape configured to have heating elements (20) suspending at different heights.