Discharge Valve Detachable Inner Lining for Wear Reduction
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Solution Overview
Problem
Discharge valves used in lignocellulosic material processing, such as pulp manufacturing and biofuel production, face issues with wear and corrosion due to high-temperature, abrasive, and corrosive processes, leading to frequent replacements and costly process interruptions.
Innovation Solution
A discharge valve with a detachable inner lining that can be replaced when worn, allowing the valve member to be angled for efficient wear distribution and using a solid, cylindrical valve member for enhanced durability, along with a design that allows for rotation to expose different surfaces to wear, extending the valve's service life and reducing maintenance stop-times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a discharge valve is continuously exposed to pressurized flow of hot, abrasive and corrosive material, then the valve controls pressure and flow effectively, but the valve wears out over time and requires frequent replacement
Solution Approach 1:
The discharge valve is divided into separate replaceable components: a wear-resistant insert (lining) that can be detached and replaced independently from the main valve body. This segmentation allows the vulnerable inner surface to be renewed without replacing the entire valve, directly addressing the wear and corrosion problem while extending service life.
Solution Approach 2:
The valve member is designed to be rotatable, allowing change in the orientation of its surface exposed to abrasive material. By rotating the valve member to present different surfaces to the wear zone, the service life is extended as worn surfaces can be repositioned away from the high-wear area, effectively changing the operational parameters of the valve surfaces.
2Reliability
If the discharge valve is replaced when worn out, then a functional valve is restored, but the process must be interrupted and equipment cooled and cleaned, causing lengthy stop-times
Solution Approach 1:
By segmenting the valve into a permanent valve body and a detachable wear insert, maintenance is simplified to only replacing the insert rather than the entire valve assembly. This reduces maintenance time and allows quicker restoration of valve functionality, minimizing process interruptions.
Solution Approach 2:
The wear-resistant insert is pre-installed in the valve body during initial setup, creating a protected flow path that can withstand abrasive material. This preliminary protective measure allows the valve to operate for extended periods before maintenance is needed, reducing the frequency of maintenance interruptions.
3Adaptability or versatility
If a standard discharge valve design is used, then the valve is simple in construction, but it lacks versatility for different process conditions and wear patterns
Solution Approach 1:
The valve body is designed as a universal platform that can accommodate different wear-resistant inserts and valve members suitable for various process conditions. The standardized interface and mounting mechanism allow multiple insert types to be used with the same valve body, providing versatility without increasing overall system complexity.
Solution Approach 2:
The valve member incorporates rotational capability, making it a dynamic component that can be adjusted during operation or maintenance. This dynamic feature allows the valve to adapt to different wear patterns and process conditions by repositioning the valve member to present different surfaces to the flow, enhancing versatility without requiring multiple fixed valve designs.
Data Source
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AI summary
A discharge valve (20) comprising a valve housing (21) which can be functionally connected to a process element (10) having a pressurized interior space. The valve housing (21) comprises a flow channel (22) having a longitudinal centre axis (A) and being in working cooperation with a valve member (23). The flow channel (22) is arranged to be in fluid communication with the pressurized interior space in the process element (10) after the discharge valve (20) has been connected to the process element (10). The valve member (23) is displaceable between an open position and a closed position in a displacement direction (B) whereby the discharge valve (20) can be opened and closed. The flow channel (22) comprises a detachable inner lining (25) having an envelope wall (26), wherein the detachable inner lining (25) comprises an aperture (30) extending through the envelope wall (26) and through which the valve member (23) is adapted to run when being displaced between the opened position and the closed position.