Chemical injection

The injection of additives into gas or liquid flows is a common use of spray nozzles.  A spray nozzle, rather than a simple open-ended injection quill, will help disperse the injected fluid far more rapidly.  Fine atomisation is desirable as this will help disperse the fluid more quickly in the process stream and increase reaction time.  At the same time, however, care needs to be taken to ensure the sides of the process pipe or vessel are not hit by the spray. 

Lances

The positioning of spray nozzles in injection applications is critical.  This will require the nozzle to be mounted on a lance of some description.  There are many designs of lance including:

• Air atomising lances
• Fully retractable lances
• Manually retractable lances
• Jacketed lances to keep the injected fluid hot or cold

SNP can design and manufacture spray lances from a huge variety of corrosion and heat-resistant materials.

Nozzle selection criteria

• Small drop size to ensure reaction
• Narrow spray angle to avoid hitting vessel walls
• Corrosion-resistant materials
• Low flow precise control of fluid