Gasification dust removal methods
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I would like to ask everyone: currently, dust removal in fluidized-bed gasification is generally done using wet methods (Venturi tubes, scrubbers, etc.) or dry methods (cyclones, filters, etc.). Why aren’t other dust removal techniques commonly used in other industries, such as bag filters or electrostatic precipitators, considered?
Bag filtration: The syngas produced by gasification has such a high temperature. Do you think it’s possible to manufacture bags suitable for use in such conditions? This applies to furnaces with upward cooling; in furnaces with downward cooling, the water vapor ratio is high, and the bags tend to get scaled.
Actually, the working principle of Shell’s fly ash filter is more or less similar to that of bag filters? Timed backflushing, pulse backflushing
Bag dust collection is limited by materials; both temperature and pressure cannot be too high. Syngas contains a certain amount of water vapor and corrosive components; once condensate forms, the bag filters can no longer be used. Electrostatic precipitators are limited by the scale of treatment, and under such conditions of crude syngas composition, it is not only particles that are captured
Every device has its scope of use; when used appropriately, it works well, but if not used correctly, even the best device becomes useless
Settling and water sealing are also types of them; venturi nozzles, various tower equipment, and electrostatic dust removal can also be used. Bag dust removal requires to be dry in order to function
\"Manual for the Design and Selection of Petrochemical Equipment – Dust Collectors\", compiled by Jin Guomiao et al.~~ It explains everything in great detail
Regarding the dust removal issue in gasification furnaces, please visit the Haichuan Chemical Industry Forum at the link http://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1445433&highlight=%C3%BA%C6%F8%BB%AF to learn in detail about the current state of dust removal technologies for gasification both domestically and internationally.