Horizontal Ceramic Filter with Counter-Pressure Cleaning
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Solution Overview
Problem
Existing filter systems with vertically arranged ceramic filter cartridges face issues such as mechanical stress, clogging, and reduced filtration capacity due to dust deposits, and conventional cleaning methods like jet pulse cleaning are ineffective for thick dust layers, especially at high temperatures.
Innovation Solution
A filter system with horizontally aligned tubular filter elements that are individually sealed and prestressed or curved to reduce tensile stress, using a counter-pressure cleaning process (CPP) with compressed gas to ensure efficient dust removal and prevent clogging, while the filter caps have a more open-pored structure to prevent unfiltered gas from entering the clean gas side.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If vertically arranged ceramic filter cartridges are used, then temperature and corrosion resistance are improved, but mechanical stress and fracture susceptibility increase
Solution Approach 1:
The filter elements are arranged horizontally instead of vertically, changing the spatial orientation from vertical to horizontal. This dimensional change eliminates tensile stress from self-weight and reduces bending moments, thereby improving mechanical strength while maintaining temperature and corrosion resistance of the ceramic material
2Ease of operation
If filter elements are cleaned using counterflows or countercurrent impulses, then particle removal is improved, but resuspension of particles occurs reducing filtration capacity
Solution Approach 1:
Instead of using counterflow or countercurrent impulses that blow particles back into the gas stream, the invention uses a downward-directed cleaning jet that follows the same direction as the particle settlement. This inverted approach removes particles without resuspension, maintaining filtration capacity while achieving effective cleaning
3Productivity
If larger filter surfaces are provided to compensate for reduced filtration capacity, then filtration performance is maintained, but system cost and complexity increase
Solution Approach 1:
The cleaning device is integrated directly into the filter element structure, with cleaning jets introduced through the filter element itself rather than requiring separate external cleaning systems. This self-service approach eliminates the need for complex external cleaning mechanisms while maintaining high filtration capacity, avoiding the need for oversized filter surfaces
4Ease of operation
If filter candles are briefly lifted during cleaning, then dust removal is improved, but sudden loading causes breakage
Solution Approach 1:
The filter elements are arranged horizontally rather than vertically, eliminating the need for lifting during cleaning operations. The horizontal arrangement allows cleaning jets to be applied directly to the filter surface without causing sudden mechanical loading, thereby improving dust removal while maintaining filter element reliability
5Strength
If horizontally aligned filter elements are used, then mechanical stress is reduced, but dust deposit removal becomes more difficult
Solution Approach 1:
High-velocity cleaning jets are introduced through the filter element to create strong pneumatic forces that remove dust deposits from horizontal surfaces. The pneumatic cleaning mechanism overcomes the gravitational advantage that makes horizontal cleaning difficult, enabling effective dust removal while maintaining the mechanical strength benefits of horizontal arrangement
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 system achieves a large raw gas loading capacity and improved cleanability, reducing the risk of filter element failure and maintaining high-temperature filtration efficiency by effectively removing dust deposits and preventing clogging, even with brittle ceramic materials.
Implementation Method 1
cleaning using counterflows or countercurrent impulses
Implementation Method 2
introduced, in particular by means of compressed gas, between the filter element and the outlet
Implementation Method 3
particle filtration from fluids, in particular from gases
Implementation Method 4
porous grain ceramic filter elements
Implementation Method 5
downward or horizontally aligned raw-gas line (5) to the filter elements (7)... dust deposits on the filter element
Data Source
Figure 1a~1c
Figure 2a~2c
Figure 3a~3b
AI summary
Filter system having cleaning device. The object is to propose an improved filter system having horizontally orientated filter elements and a cleaning device, which system, with a compact structure, is distinguished by a high dirty gas loading capacity and good cleanability. The object is achieved by a filter system comprising at least two horizontally orientated tubular filter elements (7) lying on both ends and sealed individually, wherein the filter element is open at one or both ends and is covered a filter cap, a dirty-gas-side feed (3) arranged outside the filter elements having a downwardly or horizontally directed dirty gas guide, a clean gas-side outlet (6) connected to the interior of the filter elements, at least one counter pressure cleaning device (9, 10) having a fluid valve in the outlet and also a pressurized gas feed into the outlet between filter element and outlet.