Ceramic Porous Body Skeleton Structure for Dust Filter Pressure Loss
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Solution Overview
Problem
Ceramic porous bodies used in dust collecting filters experience increased pressure loss due to low thermal conductivity, leading to frequent regeneration treatments, as particulate matters deposited on their surface or inner side are not sufficiently removed during burning.
Innovation Solution
A ceramic porous body with a controlled ratio of skeleton length of 40 μm or more in a direction orthogonal to the fluid flow direction, limited to 15% or less, is developed, along with a method involving a green body formed with an aggregate of 50 μm or less and a binder, fired at temperatures between 1330 to 1580°C, to suppress pressure loss and ensure efficient fluid flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the ceramic porous body uses conventional low thermal conductivity material, then thermal insulation is maintained, but local heat generation occurs during burning of deposited particulate matters and regeneration efficiency decreases
Solution Approach 1:
The patent changes the thermal conductivity parameter of the ceramic porous body by controlling the skeleton structure (using aggregates 50 μm or less with specific binding materials) to achieve higher thermal conductivity (0.8 W/m·K or more), which enables effective heat distribution during regeneration and prevents local heat generation, thereby improving regeneration efficiency
2Reliability
If the ceramic porous body operates with deposited particulate matters, then dust collection function is maintained, but pressure loss increases and regeneration must be performed frequently
Solution Approach 1:
The patent changes the structural parameters of the ceramic porous body (aggregate size 50 μm or less, controlled skeleton length ratio of 15% or less) to optimize the balance between dust collection capability and pressure loss, enabling longer operation intervals before regeneration is needed
3Strength
If the ratio of skeleton length 40 μm or more is high, then structural strength is improved, but pressure loss increases during use
Solution Approach 1:
The patent optimizes the skeleton structure parameters by controlling the ratio of skeleton length 40 μm or more to be 15% or less, while using aggregates of 50 μm or less, achieving a balance between structural strength and fluid flow characteristics to minimize pressure loss during operation
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 solution effectively reduces pressure loss and maintains fluid flow efficiency, even when particulate matters are deposited, thereby extending the interval between regeneration treatments.
Implementation Method 1
pore portions formed between the skeleton portions, the pore portions being capable of allowing a fluid to flow therethrough
Implementation Method 2
improvement of thermal conductivity... when the particulate matters deposited on the surface or inner side of the porous ceramic body is burned
Data Source
AI summary
A ceramic porous body includes skeleton portions; and pore portions formed between the skeleton portions, the pore portions being capable of allowing a fluid to flow therethrough. In a cross section parallel to a flow direction of the fluid, the skeleton portions have a ratio of a skeleton length of 40 μm or more of 15% or less in a direction orthogonal to the flow direction of the fluid.