Venturi Injection Flow Control for Consistent Dosing
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Solution Overview
Problem
Existing Venturi injectors face challenges in maintaining a fixed rate of dosing and suction regardless of flow rate variations, leading to increased capital and maintenance costs, back pressure issues, and inefficiencies due to conduit length and one-way check valve leakage at low back pressures.
Innovation Solution
A flow control device with a Venturi injection assembly and check valves that adjust fluid proportion based on parameters, minimizing leakage and maintaining pressure ratios, using fewer parts and reducing back pressure, even with variable speed pumps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional bypass installations are used to control motive flow, then flow rate control is achieved, but device complexity and capital costs increase due to large number of parts
Solution Approach 1:
The patent combines the flow control function and dosing function into a single integrated device. The flow control portion and injection assembly are merged into one unit, eliminating the need for separate bypass installations, manual valves, and booster pumps. This integration directly reduces the number of parts while maintaining flow control capability.
Solution Approach 2:
The integrated device performs multiple functions simultaneously: it controls motive flow rate, creates vacuum suction, and injects additives into the fluid stream. This multi-functionality replaces what previously required multiple separate components, reducing complexity while achieving the same operational goals.
2Ease of operation
If bypass installations are used to control motive flow, then flow regulation is achieved, but maintenance costs increase
Solution Approach 1:
By merging flow control and dosing functions into one device, the patent reduces the total number of components that require maintenance. Fewer separate valves, pumps, and connections mean fewer potential failure points and lower maintenance costs.
3Ease of operation
If bypass installations are used to control motive flow, then flow control is achieved, but footprint of installation increases
Solution Approach 1:
The integration of flow control and dosing functions into a single compact device significantly reduces the space required for installation. The merged design eliminates the need for extensive bypass piping and multiple separate components, resulting in a much smaller footprint.
4Ease of operation
If bypass installations are used to control motive flow, then flow rate management is achieved, but reliability decreases
Solution Approach 1:
The patent combines flow control and dosing functions into a single integrated device, reducing the total number of components and potential failure points. This integration improves reliability by eliminating multiple connection points and moving parts that could fail in conventional bypass installations.
5Ease of operation
If bypass installations are used to control motive flow, then flow regulation is achieved, but assembly time increases
Solution Approach 1:
By merging flow control and dosing functions into one pre-assembled unit, the patent dramatically reduces installation and assembly time. The integrated design requires fewer on-site connections and component assemblies compared to conventional bypass installations.
6Ease of operation
If bypass installations are used to control motive flow, then flow control is achieved, but back pressure on pumps increases due to frictional and static losses
Solution Approach 1:
The integrated device controls flow directly at the source without requiring long bypass conduits. This eliminates the frictional and static losses associated with extended piping, thereby reducing back pressure on pumps while maintaining effective flow control.
7Ease of operation
If bypass installations are used to control motive flow, then flow rate management is achieved, but efficiency decreases due to drag forces from conduit walls
Solution Approach 1:
The patent integrates flow control directly into the main flow path, eliminating the need for separate bypass conduits. This reduces drag forces and energy losses from extended piping, improving overall system efficiency while maintaining flow rate management capability.
8Speed
If conventional check valves are used in Venturi injectors, then low opening pressure is achieved, but leakage occurs at low back pressure conditions
Solution Approach 1:
The patent employs a diaphragm valve that changes its sealing parameter based on back pressure conditions. At low back pressures, the diaphragm maintains a tight seal preventing leakage, while still allowing operation at low opening pressures when needed. This parameter change enables the valve to adapt to different operating conditions.
Solution Approach 2:
The diaphragm valve combines flexible diaphragm material with precise sealing surfaces to achieve both low opening pressure and reliable sealing at low back pressure conditions. This composite approach integrates the benefits of flexible membrane operation with positive sealing characteristics.
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 device achieves efficient mixing and mass transfer with reduced leakage and maintenance costs, maintaining consistent dosing rates across varying flow conditions, and minimizing back pressure requirements.
Implementation Method 1
the additives enter a motive fluid stream via vacuum suction created by the Venturi device
Implementation Method 2
conventional Venturi injectors are prone to leakage through a suction port in situations in which a very low back pressure exists
Data Source
AI summary
A flow control device including a body having an inlet in a first end thereof, an outlet in a second end thereof, and a passageway extending between the inlet and the outlet, the flow control device further including an injection assembly located at least partially within the passageway such that at least a portion of a fluid flowing through the device passes through the injection assembly, and wherein the flow control device further comprises a flow control portion adapted to control the proportion of the fluid that passes through the injection assembly in response to one or more parameters.