Coke Oven Control Element Thermal Expansion Compensation
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Solution Overview
Problem
Coke oven chamber pressure control systems face challenges due to temperature-related expansions and displacements, leading to deviations in gas and water flow, which can result in leaks and air ingress, compromising the reliability and safety of pressure control.
Innovation Solution
A control element comprising a riser pipe with an elbow, a dip pipe, and a crown pipe, where the immersion cup and tube are encased with a collar that compensates for expansions, ensuring the water level is maintained within the control arrangement, preventing unwanted gas or water flow and maintaining a consistent pressure control without the need for readjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a control element is used to control gas pressure in coke oven chambers, then gas pressure control is achieved, but expansion-related deviations occur due to high temperatures and temperature differences
Solution Approach 1:
The control element is divided into separate components: a fixed envelope attached to the template, and a movable immersion cup assembly that can expand independently. This segmentation allows each part to handle thermal expansion differently, maintaining overall alignment and preventing deviation of the control arrangement.
Solution Approach 2:
The immersion cup assembly is designed to change its physical parameters (position, orientation) in response to temperature changes. The assembly can move vertically and rotate slightly to accommodate thermal expansion of the template and riser pipe, thereby maintaining proper alignment of the control element without compromising manufacturing precision.
2Object-generated harmful factors
If water is used for shutting off, cooling and removing water-soluble impurities from risers, then cooling and cleaning functions are achieved, but water flows out of the control element in an uncontrolled manner due to expansion deviations
Solution Approach 1:
The envelope acts as an intermediary structure between the template and the immersion cup assembly. It provides a stable reference frame that allows the immersion cup to move independently while maintaining proper sealing and control. This intermediary structure prevents uncontrolled water flow by ensuring the closure element remains properly positioned relative to the immersion cup opening.
3Manufacturing precision
If the control arrangement is rigidly fixed to prevent deviations, then alignment precision is maintained, but the system cannot accommodate thermal expansion and displacement
Solution Approach 1:
The immersion cup assembly is designed with dynamic characteristics, allowing it to move and adjust its position in response to thermal expansion. The assembly can shift vertically along the riser pipe and rotate slightly, enabling it to accommodate temperature-related displacements while maintaining proper alignment of the control element through its adjustable configuration.
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 solution maintains a consistent and reliable gas pressure control in coke oven chambers by preventing expansion-related deviations, ensuring a maintenance-free operation and preventing air ingress, thus enhancing the safety and efficiency of the coking process.
Implementation Method 1
expansions or misalignments between the template and the cover can be compensated
Implementation Method 2
the height of the water level representing a control for regulating the gas pressure
Data Source
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AI summary
The invention relates to a device for setting up a control element for controlling the gas pressure of a coke oven chamber without expansion-induced deviations of the control assembly, which deviations in comparable devices from the prior art result from high temperatures and temperature differences in coke oven chambers during operation. The device according to the invention and the method prevent water used for shutting off, cooling and removing water-soluble impurities from riser pipes from flowing out of the control element in an uncontrolled manner. The invention also relates to a method for controlling the gas pressure of a coke oven chamber using said device, wherein the pressure in the coke oven chamber relative to the collecting main conducting raw gas is controlled by using said control element without expansion-induced deviations of the regulating assembly.