Application of metal powder sintered filters in polysilicon production
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Does anyone have experience in this area? There must be great potential in the separation process.
1# CYKWS, push it yourself. The CDI mixture gas should be considered before entering the hydrogen compressor
This can be considered before the mixed gas enters the exhaust gas treatment system! This device is widely used in the polysilicon production process via the silane method
How does this filter work?
A metal powder is sintered to form a skeleton, and then a filtration substrate is sprayed on for normal mechanical filtration purposes. However, this filter can be backwashed when the pressure drop is high
Silane-based production of polysilicon involves chlorosilanes as well, and these can be filtered using titanium filter elements; the precision is excellent, and the flow rate isn’t high, making it quite suitable
Metal powder sintered filter element: Features: 1. Capable of withstanding harsh operating conditions: corrosion-resistant, heat-resistant, pressure-resistant, and long-lasting. Among the mainstream equipment in foreign polysilicon plants, there are examples of those operating at temperatures of up to ~550°C. 2. It features low filtration pressure drop, high flow rate, high precision, simple operation, easy control and maintenance, as well as a long service life for the filter elements. 3. Wide range of applications: It can be used in all scenarios involving gas/solid interactions in polysilicon production, as well as in some cases of liquid/solid separation. Disadvantage: Most of the filters in use nowadays are imported, resulting in high investment costs! Key point: The localization of high-quality filter elements is an inevitable trend for their widespread use, and this also applies to other imported equipment in polysilicon factories! ! ! I have designed multiple sets of polysilicon syngas, reducing gas, and other silicon powder filtration systems, using imported filter elements. I encourage colleagues to communicate more: zyucao@126.com
We are also considering promoting mouth care products, and we already have products under agency. I just don’t know what the competitiveness of domestic products is these days, or whether they have any practical application records in this area. Imported products still have a few good years ahead of them
Powder sintering often involves deep filtration; in applications involving gas-solid and liquid-solid separation, solid contaminants can easily cause blockages and are difficult to clean, so it is best to use sintering meshes with surface interception
It can be reused for synthesis, hydrogenation, reduction, and exhaust gas recovery.
1# CYKWS is used to capture silicon powder in gases, and it is relatively expensive