#TechTalk: Every Spin Leaves a Signature in the Air!

Dip spin coating is widely used to apply corrosion-resistant and protective finishes to fasteners and metal components. While the process appears simple, solvent-based coatings can generate volatile organic compound (VOC) emissions that may require air pollution controls to meet environmental regulations.

A typical dip spin operation includes coating storage and mixing, parts cleaning, coating application, curing, and cooling. Although emissions are generated throughout the process, curing ovens are often the largest VOC source because elevated temperatures drive solvents from the coating film into the exhaust stream.

Where Emissions Are Generated?

After cleaning, parts are submerged into a coating bath and rotated to distribute the coating while allowing excess material to drain back into the reservoir. Solvent evaporation begins during this stage and continues as coated parts move through transfer areas and into the curing oven.

For this reason, coating stations, curing ovens, and coating preparation areas are typically the primary focus when evaluating VOC control requirements.

Effective Emission Collection

The success of any VOC control system depends on proper capture before emissions reach the atmosphere.

A well-designed collection system may include:

• Coating tank enclosures
• Oven exhaust collection
• Transfer area ventilation
• Particulate filtration
• Integrated ductwork networks

Proper collection improves overall system performance and protects downstream equipment from contamination.

Why RTO Technology Is Commonly Used?

Regenerative Thermal Oxidizers (RTOs) are one of the most effective technologies for treating VOC emissions from dip spin coating operations.

Operating temperatures typically range from 1,450°F to 1,500°F, allowing destruction efficiencies greater than 98%. High-efficiency ceramic heat exchange media recovers thermal energy from the exhaust stream and returns it to the process, often achieving thermal efficiencies above 95%.
This heat recovery significantly reduces natural gas consumption and operating costs. In some applications, the energy value within the process exhaust can further reduce burner demand.

More Than Compliance

Successful projects consider emission capture, airflow management, production requirements, and energy efficiency as part of a complete control strategy.
An additional advantage of high-efficiency RTO systems is potential eligibility for utility-sponsored energy incentive programs. Advanced heat recovery and reduced fuel consumption are often key factors evaluated by qualifying providers.

At Ship & Shore Environmental, we work with manufacturers and OEMs to develop practical VOC control solutions that support compliance, operational efficiency, and long-term reliability.

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📧 Email: service@shipandshore.com