Cross-Flow Inorganic Membrane Filtration for Chlorosilane Dust Removal
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Solution Overview
Problem
Current dry and wet dust removal methods in organic chlorosilane production are inefficient and environmentally harmful, as traditional cyclone and bag-type dust collectors fail to completely remove small-sized dust, leading to complex processes and significant industrial water consumption and wastewater generation.
Innovation Solution
A dry dust removal method utilizing an inorganic film cross-flow filter for initial dust separation, followed by a bag filter, which allows for high-temperature cross-flow filtration and intermittent blowback to prevent filter cake accumulation, reducing environmental impact and water consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional cyclone and bag-type dust collectors are used for dust removal, then the process is simple, but small-sized dust cannot be completely removed leading to poor dust removal efficiency
Solution Approach 1:
The patent introduces an inorganic membrane filter as an intermediary component between the cyclone separator and bag filter. This membrane filter specifically targets and removes small-sized dust particles that traditional equipment cannot effectively capture, achieving 99.8% dust removal efficiency without significantly complicating the overall process flow.
2Manufacturing precision
If water washing method is used to further remove dust, then dust removal efficiency is improved, but industrial water consumption increases and environmental pollution occurs
Solution Approach 1:
The patent replaces the water washing mechanical system with a dry filtration system using inorganic membrane filters. This substitution eliminates the need for water consumption and wastewater discharge while maintaining high dust removal efficiency through physical filtration mechanisms.
Solution Approach 2:
The patent employs inorganic membrane filters with specific pore structures to capture small-sized dust particles. These porous materials provide effective filtration without requiring water, thus avoiding environmental pollution while achieving superior dust removal performance.
3Manufacturing precision
If terminal-type filtering method is used, then initial dust removal is achieved, but filter cake accumulates on film surface causing flow to rapidly decrease
Solution Approach 1:
The patent implements periodic backwashing cycles where compressed air is periodically introduced to reverse the filtration direction and remove accumulated filter cake from the membrane surface. This periodic action restores filtration flow rate and maintains high productivity over extended operation periods.
Solution Approach 2:
The system incorporates an automatic backwashing mechanism that uses a portion of the filtered gas stream to clean the filter elements. This self-service approach maintains filtration efficiency without requiring external cleaning resources or manual intervention.
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
This method achieves a high dust removal efficiency exceeding 99.8% with minimal environmental pollution and simplified process, as the inorganic film cross-flow filter effectively separates small-sized dust without the need for wet washing, maintaining high mechanical strength and stability.
Implementation Method 1
an inorganic film cross-flow filter is used to accomplish the separation of solid and gas
Implementation Method 2
inorganic film cross-flow filter... high-temperature cross-flow filtration
Implementation Method 3
intermittent blowback to prevent filter cake accumulation
Data Source
AI summary
Dry dust removal method in organic chlorosilane production is provided, in which the detailed steps are as follows: delivering high-temperature flue gas (a) from fluidized bed reactor (I) into inorganic film cross-flow filter (E) to remove dust for the first time; delivering the concentrated dust gas (c) trapped by inorganic film cross-flow filter (II) into bag filter (III) to remove dust for the second time; returning the gas mixture (f) of passing through bag filter (EI) to the air intake of inorganic film cross-flow filter (II); condensing the residual clean gas (b) from the osmotic side of inorganic film in condenser (A), and then rectifying in rectifying column (B) to separate the products of chloromethane (g) and methyl chlorosilane (h) to obtain the product of methyl chlorosilane (h); returning chloromethane to fluidized bed reactor to take part in reaction; retreating the dust (e) trapped by inorganic film cross-flow filter and bag filter, and then returning it to fluidized bed reactor (I) to take part in reaction.