- Home
- Companies
- Yurcent Environmental Technology Co., ...
- Applications
- VOC Management Solution for Film ...
VOC Management Solution for Film Coating Industry - Plastics & Resins
In recent years, the film coating industry has seen significant advancements in environmental management, particularly in addressing Volatile Organic Compounds (VOCs). The Yurcent Regenerative Thermal Oxidizer (RTO) has emerged as a leading solution for companies involved in the production of various films and materials. These include release films, protective films, reflective materials, advertising consumables, adhesive tapes, polarizers, solar backplane films, aluminum-plastic films, and lithium battery separators. The RTO technology is specifically designed to handle the unique challenges posed by these industries, ensuring efficient VOC management.
Waste Gas Characteristics
Sources of Waste Gas
Waste gas emissions in the film coating industry originate from multiple sources:
- Organized waste gas: These come primarily from coating ovens where solvents evaporate during the drying process.
- Unorganized waste gas: These are less predictable and arise from areas such as coating machines and glue dispensing stations, where solvent usage is more sporadic.
Waste Gas Components
The waste gases typically contain a variety of organic compounds, including:
- Ethyl acetate: Commonly used as a solvent in coatings.
- Toluene: A widely used aromatic hydrocarbon in industrial processes.
- Isopropanol: Often employed for its fast-drying properties.
- Butanone: Known for its effectiveness in dissolving resins and polymers.
- n-Hexane: Utilized for its low boiling point and solvent properties.
Process Design Overview
The treatment process for managing VOC emissions involves several key steps:
1. Air Reduction and Concentration: This initial step aims to reduce the volume of waste gas while concentrating the pollutants. By doing so, the subsequent treatment stages become more efficient and cost-effective.
2. Rotary valve RTO Treatment:** The core of the system is the rotary valve RTO, which operates by oxidizing VOCs at high temperatures (typically between 750°C and 900°C). This process breaks down the organic compounds into carbon dioxide and water vapor, significantly reducing their environmental impact.
3. Waste Heat Recovery: To maximize energy efficiency, waste heat recovery methods are integrated into the system. These methods not only reduce energy consumption but also lower operational costs. Techniques include:
- Hot water recycling: Capturing heat to preheat incoming air or water.
- Steam recycling: Using recovered heat to generate steam for other industrial processes.
- Hot air recycling: Reusing heated air for drying or heating purposes.
- Heat transfer oil recycling: Employing heat transfer oils to capture and redistribute thermal energy.
Waste Gas Concentration Levels
The concentration of waste gases can vary depending on the specific production process and materials used. Typically, concentrations range from 1500 mg/m³ to 10,000 mg/m³. Higher concentrations may require additional pretreatment steps to ensure optimal performance of the RTO system.
Compliance with Emission Standards
To meet stringent environmental regulations, the emission limit for Non-Methane Hydrocarbons (NMHC) is set at ≤50 mg/m³. This standard ensures that treated exhaust gases are safe for release into the atmosphere, minimizing the impact on air quality and public health.
By implementing this comprehensive solution, companies in the film coating industry can achieve both environmental compliance and operational efficiency, contributing to sustainable manufacturing practices.