Filter Regeneration Gas Control for Product Gas Plants
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Solution Overview
Problem
Current methods for cleaning filter apparatuses in product gas lines, which involve oxidizing conditions to remove carbon and hydrocarbon deposits, often lead to overheating and uneven cleaning due to limited inert gas availability, resulting in slow and inefficient filter regeneration.
Innovation Solution
The solution involves measuring and controlling oxygen content and temperature of the regeneration gas, using oxygen or oxygen-rich gas mixtures, and adjusting gas flow rates to optimize the cleaning process, while also employing scavenging gases and recirculation to manage temperature and flow effectively, and allowing for parallel filter cleaning to maintain production during regeneration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If oxidizing conditions are used to clean filters, then dirt removal is improved, but filter temperature control deteriorates leading to overheating
Solution Approach 1:
The patent applies parameter changes by controlling the oxygen content in the regeneration gas to optimize the cleaning process. By adjusting the oxygen concentration parameter, the system achieves effective dirt removal while preventing excessive temperature rise that would damage the filter structure.
Solution Approach 2:
The patent implements feedback control through measuring means that monitor oxygen content and temperature in the regeneration gas. This feedback information is used by adjusting means to dynamically control the gas flow and oxygen content, ensuring the filter is cleaned effectively without overheating.
2Temperature
If inert gas is fed to control oxygen content, then temperature control is improved, but cleaning speed deteriorates due to low total flow
Solution Approach 1:
The patent changes the parameter of oxygen content in the regeneration gas rather than using pure inert gas. By controlling oxygen content at optimized levels, the system maintains good temperature control while achieving sufficiently high total flow rates for effective and timely cleaning.
Solution Approach 2:
The measuring means monitor oxygen content and temperature to provide feedback that enables dynamic adjustment of the gas flow. This feedback control allows the system to maintain optimal cleaning speed while preventing temperature excursions.
3Temperature
If low total flow is used for cleaning, then oxygen content control is improved, but flow distribution deteriorates leading to non-uniform cleaning
Solution Approach 1:
The patent optimizes the parameter of oxygen content in the regeneration gas to achieve a balance between temperature control and flow distribution. By controlling oxygen content at appropriate levels rather than using very low flows, the system ensures both temperature management and uniform flow distribution across the filter for consistent cleaning results.
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
This approach prevents overheating, ensures uniform cleaning, and speeds up the regeneration process, allowing for more efficient and controlled filter cleaning without damaging the filter structures, thus extending their usability and maintaining product gas production.
Implementation Method 1
the regeneration gas oxidizes the dirt accumulated on the filter by controlling the oxygen content
Data Source
Figure 1~2
Figure 3a~3b
Figure 4a~4b
AI summary
An arrangement and method for cleaning a filter apparatus (3) arranged to a product gas line (2) of a product gas producing plant (1). In the method a filter (5) of the filter apparatus (3) is separated from the product gas line (2) with closing means (4), oxygen-containing control gas (CG) is fed into the filter (5) separated from the product gas line (2), the control gas (CG) forming at least part of the regeneration gas (RG) cleaning the filter (5), and the regeneration gas (RG) that has passed through the filter (5) is removed from the filter (5).