As the global shipbuilding industry accelerates toward green and low-carbon manufacturing, VOCs emission control has become a critical environmental challenge for shipyards worldwide. During shipbuilding and pretreatment processes, paint mixing, spray painting, and drying operations generate large volumes of volatile organic compounds (VOCs). Choosing a professional shipyard spray painting exhaust gas treatment company with proven engineering experience is essential for achieving compliant and energy-efficient production.
Recently, CADAIR successfully completed and delivered a spray painting exhaust gas treatment project for a major shipbuilding company in Shanghai, China. The project passed final acceptance smoothly and marks the second cooperation between the two parties following a previous RTO project completed in 2018.
Shanghai Shipyard VOC Treatment Project Successfully Passed Acceptance
Project Background
In ship pretreatment lines, painting and drying processes release VOC-containing exhaust gases, including benzene compounds, alcohols, esters, and other hazardous organic pollutants.
The new project was designed to treat exhaust gases generated from:
- Paint mixing processes
- Spray painting operations
- Drying sections
The goal was to ensure stable compliance with the Shanghai shipbuilding air emission standards while reducing long-term operating costs.
Project Key Parameters
| Item | Details |
|---|---|
| Industry | Shipyard Spray Painting VOC Treatment |
| Exhaust Sources | Paint mixing, spray coating, drying |
| Airflow Volume | 22,000 m³/h |
| VOC Concentration | 1800 mg/m³ |
| Treatment Technology | RTO Regenerative Thermal Oxidizer |
| Emission Standard | DB31/934 Shipbuilding Industry Air Pollutant Emission Standard |
| Project Status | Successfully Accepted |
The system adopts a high-efficiency regenerative thermal oxidizer (RTO) independently developed by CADAIR. The heat recovery efficiency exceeds 95%, enabling self-sustaining combustion under suitable VOC concentrations and significantly reducing fuel consumption.
Eight Years of Stable Operation Led to a Second Cooperation
Back in 2018, CADAIR supplied a 25,000 m³/h RTO system for the client’s 4.5-meter pretreatment line.
The system was designed to treat VOC emissions generated from:
- Titanium dioxide coating processes
- Ethyl silicate emissions
- Ethanol-containing exhaust gas
- Shipyard painting VOCs
After years of stable operation, the original RTO equipment continued to maintain compliant emissions with reliable performance and low maintenance requirements.
In 2026, when the shipyard expanded its 3-meter pretreatment line, the client once again selected CADAIR as its preferred shipyard VOC treatment solution provider.
For industrial clients, repeat cooperation is often the strongest proof of:
- Reliable equipment performance
- Stable VOC removal efficiency
- Low maintenance costs
- Responsive after-sales service
- Long-term operational stability
Why Is RTO the Preferred Technology for Shipyard Spray Painting Exhaust Gas Treatment?
What Is an RTO?
RTO (Regenerative Thermal Oxidizer) is one of the most widely used and energy-efficient technologies for industrial VOC abatement.
It is particularly suitable for:
- Shipyard spray painting exhaust treatment
- Heavy-duty anti-corrosion coating lines
- Large airflow VOC systems
- High-safety industrial environments
Advantages of RTO for Shipyard VOC Treatment
1. High VOC Removal Efficiency
Shipyard painting exhaust gases typically contain:
- Benzene
- Toluene
- Xylene
- Alcohols
- Esters
CADAIR RTO systems oxidize VOCs at temperatures above 760°C, converting harmful pollutants into CO₂ and H₂O.
VOC destruction efficiency can reach:
- 95%
- 98%
- Up to 99%
ensuring stable compliance with environmental regulations.
2. Significant Energy Savings
CADAIR RTO systems utilize advanced ceramic heat storage media with heat recovery efficiency exceeding 95%.
For shipyard coating applications:
- VOCs themselves contain thermal energy
- The system can achieve self-sustaining combustion at certain concentrations
- Natural gas consumption is significantly reduced
Recovered thermal energy can also be reused for:
- Drying ovens
- Workshop heating
- Industrial heat recovery applications
This helps shipyards reduce long-term operational costs.
3. Designed for Complex Shipyard Conditions
Shipyard spray painting exhaust gases often feature:
- Sticky paint mist
- Large air volume
- Variable operating conditions
- Strict safety requirements
To address these challenges, CADAIR adopts customized RTO exhaust gas treatment systems with:
- Multi-stage filtration to prevent clogging
- High-efficiency thermal oxidation technology
- Intelligent PLC automation control
- More than 20 safety interlock protections
- Stable long-term operation
This integrated solution is especially suitable for continuous shipbuilding production lines.
CADAIR Has Extensive Experience in Shipyard VOC Treatment
In addition to this project, CADAIR has provided VOC treatment solutions for:
- Guangzhou Shipyard International
- United Shipyard
- Offshore engineering manufacturers
- Heavy-duty coating enterprises
With years of experience in the marine industry, CADAIR can provide customized exhaust gas treatment systems for different pretreatment lines and painting processes.
Why More Industrial Clients Choose CADAIR
As a professional VOC treatment equipment manufacturer in China, CADAIR offers complete in-house R&D and manufacturing capabilities for:
- RTO regenerative thermal oxidizers
- TO direct-fired thermal oxidizers
- CO catalytic oxidation systems
- RCO catalytic combustion equipment
To date, CADAIR has completed:
- 1300+ VOC treatment projects
- Serving 1000+ industrial customers worldwide
Industries served include:
- Shipbuilding
- Semiconductor manufacturing
- Chemical processing
- Pharmaceutical production
- Packaging and printing
- Lithium battery manufacturing
- Carbon fiber production
- Industrial coating and painting
Conclusion | Looking for a Reliable Shipyard Spray Painting Exhaust Gas Treatment Company?
When selecting a shipyard VOC treatment supplier, choosing a company with proven engineering experience is far more important than simply comparing prices.
A reliable industrial RTO system should provide:
- Stable compliant emissions
- Low operating costs
- High operational safety
- Long-term reliability
- Professional after-sales support
If you are searching for:
- Shipyard spray painting exhaust gas treatment companies
- Marine VOC treatment solutions
- RTO regenerative thermal oxidizer manufacturers
- Shipbuilding VOC abatement systems
- Pretreatment line exhaust gas treatment equipment
