Variable Flow Screen Nozzle for Resin Backwash Adaptability
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Solution Overview
Problem
Existing nozzles in resin processes face challenges in adapting flow characteristics to varying conditions, such as backwash, which requires nozzles that can adjust flow resistance effectively between downflow and upflow phases, but current designs are difficult to manufacture and may not achieve desired performance.
Innovation Solution
A variable flow control nozzle with a body, screen, and valve that allows for different fluid flow rates depending on the direction, utilizing a ball valve to control flow between first and second positions, enabling greater flow rates during backwash compared to normal process flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing nozzle designs are used, then manufacturing simplicity is maintained, but the ability to adapt flow characteristics for different process stages (downflow and backwash) is insufficient
Solution Approach 1:
The nozzle incorporates a movable valve element (ball or plug) that can shift position in response to flow direction and pressure differential. During backwash, the valve moves to expose additional flow paths; during downflow, it returns to its original position. This dynamic adjustment allows a single nozzle structure to provide adaptably different flow characteristics for different process stages without requiring multiple fixed nozzles.
Solution Approach 2:
The nozzle design integrates multiple functions into a single device: it serves as both a flow distributor during downflow and a flow amplifier during backwash. The valve element, seat openings, and ports are configured so that the same nozzle structure performs differently based on flow direction, eliminating the need for separate nozzles for each function and reducing overall system complexity.
2Productivity
If nozzles are designed for high flow rates, then downflow distribution is effective, but backwash flow control becomes insufficient
Solution Approach 1:
The valve element dynamically reconfigures the flow paths based on operating conditions. During high-flow downflow, the valve position optimizes for distribution efficiency. During low-flow backwash, the pressure differential moves the valve to expose additional seat openings and ports, increasing the effective flow area and enabling adequate backwash flow rates despite the inherently lower flow conditions.
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 nozzle provides adaptable flow control, ensuring suitable performance across a range of conditions, maintaining distribution efficiency during both downflow and backwash phases, and is designed for durability with metal components and easy maintenance.
Implementation Method 1
the valve is movable between first and second conditions. When the valve is in the first condition, it permits first fluid flow from the second seat opening and port out the first port. On the other hand, the valve in the second condition permits second fluid flow from the first seat opening and port out the second port.
Implementation Method 2
The screen is disposed on the body and screens fluid flow into and out of the second seat opening and port.
Data Source
AI summary
A variable flow control nozzle has a head, a tube, and a valve. The head disposes adjacent an opening and has a screen for passage of fluid flow into and out of the head's interior. The tube extends from the head through the opening and secures the head thereto. A tube passage communicates the interior of the head with the other side of the opening. The valve disposed in the passage has a first condition permitting first fluid flow from the passage to the interior of the head and has a second condition permitting second fluid flow from the interior to the passage. The second fluid flow may be greater than the first fluid flow. The tube can have first and second tube members with different internal diameters, and the valve can use a ball movable between positions in the tube members.