Diverging Nozzle Design for Filter Cleaning Pressure
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Solution Overview
Problem
Dust collector devices face challenges in effectively cleaning filter elements due to insufficient pressure from exhaust jets, which fail to dislodge particulate matter efficiently.
Innovation Solution
The use of diverging nozzles that direct pressurized gas through a manifold and valve system, creating reverse gas pulses with varying angles and channel configurations to increase peak pressure within filter elements, enhancing cleaning efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If conventional nozzles are used to deliver exhaust gas for back flushing filters, then the system structure remains simple, but the pressure inside the filter element is insufficient to dislodge particulate matter effectively
Solution Approach 1:
The nozzle design changes the geometric parameters of the gas flow path, specifically creating a converging section followed by a diverging section. This parameter change in the flow path geometry transforms the exhaust gas into a high-speed jet that generates significantly higher pressure inside the filter element, resolving the pressure insufficiency problem.
Solution Approach 2:
The nozzle employs curved flow paths with specific convergence and divergence angles rather than straight linear paths. This curvature design optimizes the gas flow dynamics, allowing the exhaust gas to accelerate efficiently in the converging section and then expand controllably in the diverging section, maximizing the pressure generated within the filter element.
2Productivity
If higher pressure is achieved using conventional nozzles, then cleaning effectiveness improves, but the nozzle design becomes more complex
Solution Approach 1:
By optimizing the convergence angle and divergence angle as key geometric parameters, the nozzle achieves high cleaning efficiency through controlled gas flow acceleration and expansion. These parameter optimizations allow the system to deliver effective cleaning pressure without requiring overly complex multi-component designs.
Solution Approach 2:
The nozzle design serves multiple functions simultaneously: it acts as a flow accelerator, pressure generator, and flow director. This multi-functionality is achieved through a single integrated component with optimized geometric parameters, avoiding the need for multiple separate devices and thereby maintaining relative simplicity while achieving high productivity.
3Stress or pressure
If the nozzle channel width remains constant, then manufacturing is simpler, but the gas pressure and flow velocity are not optimized for effective cleaning
Solution Approach 1:
The nozzle design deliberately changes the channel width parameter along the flow direction, creating converging and diverging sections with specific angles. This parameter variation optimizes the gas pressure and velocity distribution, achieving effective cleaning while the angles are constrained within specific ranges to maintain manufacturability.
Solution Approach 2:
Different sections of the nozzle have different channel width characteristics tailored to their specific functions: the converging section has decreasing width to accelerate flow, while the diverging section has increasing width to control expansion. This local optimization of the width parameter achieves pressure optimization without requiring extreme or difficult-to-manufacture geometries.
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 diverging nozzle system significantly increases average peak pressure inside filter elements, improving the dislodgment of particulate matter and overall cleaning efficiency.
Implementation Method 1
The interior channel comprises a first section proximate the connector end and a second section proximate the free end such that the first section is located between the second section and the connector end and the second section is located between the first section and the free end; wherein the opposing interior surfaces of the nozzle in the first section diverge from the longitudinal axis at a first angle, wherein the first angle is greater than zero (0) degrees; and wherein the opposing interior surfaces of the nozzle in the second section diverge from the longitudinal axis at a second angle that is greater than the first angle.
Data Source
AI summary
Diverging nozzles and filter element cleaning systems using the diverging nozzles to produce reverse gas pulses in a variety of cleaning methods are described herein.