Fine-Particles-Removing Device Dry Flue Gas Cleaning
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Solution Overview
Problem
Current dry cyclone separators are inefficient in removing fine particles smaller than 20 microns from flue gases, as they rely on centrifugal and drag forces that are insufficient for such small particles, and adding a liquid is not feasible for dry gas cleaning.
Innovation Solution
A Fine-Particles-Removing Device (FPRD) incorporating a pressure-manipulating-device (PMD) with an inverse-perforated-cone (IPC) is used between the small-base-of-hollow-truncated-cone (SBHTC) and the collecting receptacle, which manipulates gas-dust flow to direct fine particles towards the walls for collection, achieving efficient removal by optimizing the distance and configuration of the PMD.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If liquid is added to the cyclone separator to improve fine particle removal, then particle removal efficiency is improved, but the dry gas cleaning requirement is violated
Solution Approach 1:
The patent replaces the liquid-based mechanical separation system with an electrostatic field-based separation system. The electrostatic precipitator uses electric fields to charge and collect particles, eliminating the need for liquid while maintaining high removal efficiency for fine particles.
Solution Approach 2:
The patent changes the separation mechanism from liquid-based centrifugal force to electrostatic force by applying high voltage. This parameter change allows the system to achieve effective fine particle removal through electrical charging and collection rather than liquid impingement.
2Reliability
If centrifugal force is increased to improve particle separation, then separation efficiency is improved, but fine particles below 20 microns remain ineffective
Solution Approach 1:
The patent replaces the centrifugal mechanical separation system with an electrostatic separation system. The electrostatic precipitator charges particles through corona discharge and collects them on oppositely charged collection plates, providing effective separation for particles as small as 10 microns or less.
Solution Approach 2:
The patent uses electrostatic fields and electrical forces instead of mechanical centrifugal forces. The high voltage electrostatic field creates ionization and electrostatic attraction/repulsion forces that are much more effective for fine particle separation than centrifugal force alone.
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 FPRD achieves over 90% efficiency in removing particles as small as 10 microns through the strategic placement and design of the inverse-perforated-cone PMD, ensuring effective dry cleaning of flue gases without the need for liquid addition.
Implementation Method 1
A Fine-Particles-Removing Device (FPRD) incorporating a pressure-manipulating-device (PMD) with an inverse-perforated-cone (IPC) is used between the small-base-of-hollow-truncated-cone (SBHTC) and the collecting receptacle, which manipulates gas-dust flow to direct fine particles towards the walls for collection
Implementation Method 2
The wet filtering is based on conveying tangential motion to fluid entering a cleaning vessel and separation of the solid particles therefrom by centrifugal force
Implementation Method 3
the dust is collected through said small-base-of-hollow-truncated-cone (SBHTC) into an appropriate collecting receptacle
Data Source
AI summary
A novel Fine-Particles-Removing Device (FPRD) is disclosed. The FPRD can be used removing fine particles from a flow of gas. Some embodiments of the FPRD can comprise a housing having a peripheral wall, upper and lower extremities wherein the housing comprises at least one inlet opening for receiving the gaseous stream and an inner-ring having a plurality of gaps. The housing can be associated with outlet means for removing of solid contaminants from the housing into a collecting receptacle for collecting the removed solid contaminants from the outlet means. In addition a pressure-manipulating-device (PMD) can be placed between the outlet means and the collecting receptacle.