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GAS SCRUBBING

In chemical and industrial processes, spraying reagents into gas streams is a common method for removing contaminants or altering gas composition. With strict environmental regulations governing industrial emissions, effective gas scrubbing solutions are essential. SYNERGY SPRAY SYSTEMS provides a broad range of nozzles specifically designed for harsh scrubbing environments, addressing both environmental and operational needs.

Droplet Size and Absorption Efficiency

Smaller droplets offer greater surface area for interaction, enhancing gas absorption. However, overly fine droplets may get carried away by fast-moving gas streams before effective interaction occurs. Thus, there is a balance between droplet size and residence time to ensure maximum gas-liquid contact.
Droplet Size and Absorption Efficiency
Residence Time and Chamber Geometry

Residence Time and Chamber Geometry

The effectiveness of scrubbing is influenced by how long droplets stay within the gas flow. High-speed gases reduce this time, especially for smaller droplets. Droplets must be sized appropriately to stay suspended long enough for optimal reaction.

Spray Surface Area Dynamics

For a fixed spray flow rate, the surface area of droplets in the gas stream is key. Smaller droplets increase surface area but reduce residence time. The goal is to find the optimal droplet size that maximizes surface area while maintaining sufficient time within the chamber for absorption.
Spray Surface Area Dynamics
Gas Flow Direction and Velocity Considerations

Gas Flow Direction and Velocity Considerations

Fine mists offer better absorption but may not travel far in high-speed gas flows. The ideal nozzle creates a spray pattern with a mix of droplet sizes—small for reactivity, large for distance and coverage. Spiral designs are especially effective in balancing these needs.

Operational Environment Challenges

Gas scrubbing environments are typically hot, fast-moving, and chemically aggressive. The nozzles must resist corrosion and wear from both the gases and the reagents. SYNERGY’s ST series uses abrasion-resistant alloys and ceramics to ensure durability in extreme conditions.

Operational Environment Challenges
Flue Gas Desulphurization

Flue Gas Desulphurization (FGD)

Removing sulfur dioxide (SO2) at scale from power plant emissions requires specialized nozzles. These are typically constructed from erosion- and corrosion-resistant materials and engineered to deliver consistent droplet distribution under high flow and temperature conditions.

SYNERGY SPRAY SYSTEMS delivers reliable, high-performance gas scrubbing nozzles for applications across power generation, chemical processing, and environmental management sectors.

Nozzle Selection for Gas Scrubbing

Different scrubbing setups demand specific nozzle configurations
Packed bed scrubbers benefit from TF spiral nozzles due to their wide spray coverage (up to 170°).
Spray tower scrubbers require fine atomization for high absorption, which TF nozzles effectively deliver.

Wet vs. Dry Scrubbing

Wet Scrubbing: Involves complete saturation of the gas flow with liquid reagent. Fine atomization is preferred, but droplet strength must be enough to withstand gas velocity.
Dry Scrubbing: Uses limited liquid that must fully evaporate to avoid contaminating downstream processes. Precision in droplet control is crucial to ensure complete evaporation without residue.

Ideal Nozzle Types

TF Spiral Nozzles: Provide good atomization and include larger droplets to penetrate high-velocity gas flows. Also resistant to clogging and available in wear-resistant materials (ST series).
Half-Cone Spiral Nozzles: Ideal for large towers, they direct spray inward from the perimeter, preventing wall buildup.

SC and MP Series: Suitable for high-volume flows where large droplets are needed to resist gas entrainment.

SA Series (Air Atomizing): Best for medium-sized flows needing fine droplets with rapid evaporation.

P Series Misting Nozzles: Suitable for low-flow scenarios.

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