Plug Valve Internal Check Valve Catalyst Erosion
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Solution Overview
Problem
Existing plug valves used in fluid catalytic methods suffer from catalyst particle infiltration due to turbulent airflow, leading to abnormal wear from catalyst erosion.
Innovation Solution
A valve device with a plug closure member and a check valve system, featuring a stop device with radially projecting vane plates and a check valve with a larger diameter plate that moves between closed and open positions to control lift air flow, reducing catalyst particle ingress by minimizing turbulence and ensuring uniform airflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a check valve is used to control air flow exit, then air flow control is improved, but catalyst particle infiltration increases due to turbulent airflow
Solution Approach 1:
The check valve plate is segmented into multiple vanes that can move independently or in coordination. This segmentation allows the valve to control airflow in a more gradual and distributed manner, reducing the intensity of turbulence and minimizing catalyst particle infiltration while maintaining effective airflow control.
Solution Approach 2:
The check valve employs dynamic movement of the plate between open and closed positions responsive to pressure differentials. This dynamic operation allows the valve to adapt to varying flow conditions, opening to allow airflow when pressure differential is favorable and closing to prevent backflow and reduce turbulence-induced particle infiltration.
2Ease of operation
If a hollow tube plug valve with internal check valve is used, then air flow control is improved, but abnormal wear occurs due to catalyst erosion
Solution Approach 1:
The invention converts the harmful turbulent airflow into a beneficial controlled flow pattern. By designing the check valve plate with specific geometry and movement characteristics, the airflow that would normally cause turbulence and erosion is redirected to flow smoothly through defined passages, eliminating the harmful effect while maintaining the airflow control function.
Solution Approach 2:
The check valve plate acts as an intermediary element between the incoming airflow and the hollow tube plug valve. It mediates the flow by filtering out catalyst particles through its structure and controlling the airflow pattern, thereby protecting the plug valve from direct exposure to erosive catalyst-laden turbulent flow.
3Ease of operation
If the check valve plate diameter is increased to improve flow control, then airflow regulation is improved, but device complexity increases
Solution Approach 1:
The check valve plate is designed to perform multiple functions simultaneously: it controls airflow regulation, filters catalyst particles, and provides structural support. This multi-functionality allows a single component to achieve flow control precision without requiring additional separate components, thereby avoiding increased device complexity.
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 effectively reduces catalyst particle entry into the valve, minimizing wear and ensuring consistent airflow, thereby extending the valve's operational lifespan and maintaining flow control efficiency.
Implementation Method 1
The check valve can move between an open position, in which air flow can exit the valve device, and a closed position, in which air flow is prevented from exiting the valve device
Implementation Method 2
air flow past the check valve can be turbulent, thus allowing catalyst particles to infiltrate the hollow tube plug valve during normal operation
Data Source
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AI summary
A valve device (10) is provided for controlling air flow. The valve device (10) includes a plug closure member (50) having an interior chamber (64) and a stop device (120) positioned within the interior chamber (64) of the plug closure member (50). The valve device (10) further includes a check valve (100) having a plate (102) positioned adjacent an inlet opening (66) of the plug closure member (50) and an alignment device (112) attached to the plate (102) and received within a stop opening (122) of the stop device (120). The check valve (100) is movable between a closed position in which the plate (102) limits passage of a lift air through the interior chamber (64) and an open position in which the plate (102) allows passage of the lift air through the interior chamber (64). The stop device (120) engages the check valve (100) in the open position.