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Performance and Characteristics of High-Pressure Centrifugal Radial
Fans in Industrial Applications Involving Corrosive Gases
When high-pressure centrifugal radial fans are used to handle
corrosive gases, they exhibit distinct characteristics in terms of
material selection, structural design, performance, and industrial
adaptability:
1. Material and Anti-Corrosion Design
- Corrosion-resistant materials such as 316L stainless steel,
fiberglass-reinforced plastic (FRP), and polytetrafluoroethylene
(PTFE) must be adopted to resist erosion from acidic, alkaline, or
chemical solvent-containing gases. For instance, 316L stainless
steel impellers can effectively prevent sulfide corrosion when
handling sulfur-containing flue gas; FRP volutes are suitable for
highly corrosive chemical tail gas environments.
- Some components undergo surface anti-corrosion treatments like
chrome plating and anti-corrosion coating spraying (e.g., epoxy
resin coating) to enhance the corrosion resistance of parts prone
to wear or frequent contact with corrosive media.
2. Performance
- High-pressure characteristics: It can provide high static
pressure (usually up to several thousand Pascals), which can
overcome the flow resistance of corrosive gases in long-distance
pipelines, complex pipe networks, or high-resistance filtration
devices, ensuring efficient gas transportation.
- Flow stability: The structure of the radial impeller minimizes
the impact of pressure changes on the flow rate when handling
corrosive gases, enabling it to maintain a relatively stable gas
delivery volume even when operating conditions fluctuate.
- Efficiency and energy consumption: Although the efficiency of
high-pressure centrifugal radial fans is slightly lower than that
of backward-inclined fans, they still maintain a reasonable energy
efficiency ratio under high-pressure operating conditions. This
meets the "high-pressure, low-flow" gas transportation requirements
in industrial production (e.g., gas pressurization in chemical
reaction kettles, high-pressure injection in dust removal systems).
3. Industrial Application Adaptability
- Chemical industry: Used for transporting corrosive process gases
containing acids, alkalis, or organic solvents, such as reaction
tail gas in chemical synthesis processes and the collection and
treatment of acid-alkali waste gas.
- Environmental protection field: In desulfurization and
denitrification systems, it transports corrosive flue gas
containing sulfur and nitrogen, and cooperates with environmental
protection equipment to achieve pollutant purification.
- Pharmaceutical and food industries: Handles corrosive steam or
clean gases (when sanitary requirements are required, stainless
steel materials are used with polishing treatment), such as the
discharge of corrosive waste gas in pharmaceutical workshops and
gas circulation during food fermentation.
4. Maintenance and Service Life
- Due to long-term exposure to corrosive gases, it is necessary to
regularly inspect the integrity of the anti-corrosion coating and
the wear condition of the impeller, and replace parts that are aged
or severely corroded in a timely manner to extend the service life
of the equipment.
- Fans with a modular design facilitate the disassembly and
replacement of components, reducing maintenance difficulty and
downtime, and ensuring the continuity of industrial production.
In summary, through targeted anti-corrosion design and
high-pressure performance, high-pressure centrifugal radial fans
have become key equipment for handling corrosive gases in the
industrial field, playing an important role in ensuring production
safety and improving process efficiency.
Key Features
Applications