Efficient Air Pollution Control in the Recycling Industry

Chemical reactions generate exhaust streams with variable VOC concentrations and a wide variety of diverse reaction byproducts. Fluctuating operating conditions and discontinuous processes require flexible designs concepts that ensure safe, stable emission treatment under dynamic loads.

Distillation, evaporation, drying, and pyrolysis systems produce elevated temperature exhaust air. These hot gas streams offer prime conditions for energy-efficient treatment, especially when combined with heat recovery to reduce overall plant fuel and CO₂ emissions.

Thermochemical processes such as pyrolysis generate highly contaminated, complex exhaust streams containing organic cracking products and varying compositions. They require robust, high-performance systems capable of reliable operation under challenging thermal and chemical conditions.

Lithium-ion batteries are widely used in the electrification of the automotive industry. At the end of their service life, these batteries must be recycled safely and in an environmentally responsible manner. However, recycling processes generate toxic emissions such as hydrogen fluoride (HF) as well as solvent-containing exhaust air from the electrolyte, which must be reliably treated. For this purpose, Envanio offers regenerative thermal oxidation (RTO) systems and scrubbers. Depending on the application, the RTO systems can also be electrically heated. 

When refrigerators are shredded, propellants are released from the insulation foams, along with solvents and other organic compounds from refrigeration circuits. These emissions must be safely treated to meet environmental and safety requirements. Hybrid RTO systems are used for this purpose, in which the volatile organic compounds are utilized directly as fuel in the combustion chamber. This reduces the system’s additional energy requirements and makes thermal oxidation particularly efficient. These systems are also frequently combined with integrated heat recovery to further increase overall process energy efficiency. 

Precious metals are used in numerous products across the jewelry, electronics, and process industries, making their recovery both economically and environmentally sound. The thermal processing and recycling methods used for this purpose generate various pollutants depending on the feedstock, including dust, acidic gases, and organic and inorganic pollutant compounds. To ensure compliance with emission limits, multi-stage air pollution control systems are used to reliably remove these various pollutant components, ensuring environmentally sound plant operation.

Whether it involves the pyrolysis of plastics, tires, biomass, or waste: Thermal treatment generates complex exhaust gas streams containing volatile organic compounds (VOCs), hydrocarbons, odors, particulates, and other process-specific pollutants. The gas compositions can vary significantly under demanding operating conditions, requiring robust and flexibly designed exhaust air treatment concepts. Envanio offers customized solutions for this purpose, ranging from thermal oxidation to multi-stage exhaust gas treatment systems with integrated heat recovery. This reliably reduces emissions while simultaneously optimizing the energy efficiency of the entire process.

When recycling waste materials containing lead and copper, materials are melted down in thermal processes to recover valuable metals. Depending on the raw materials used, the process generates various emissions that must be reliably treated. In addition to dust, sulfur dioxide (SO₂) poses a major challenge for air pollution control. Envanio offers high-performance desulfurization (DeSOx) solutions for this purpose, available in both wet and dry configurations.

Our systems are designed to handle a wide range of industrial emissions, from volatile organic compounds (VOCs) and solvent vapors to strong odors and complex mixtures of organic pollutants. When selecting the appropriate system design, we tailor our approach directly to the requirements of your chemical processes.

Exhaust air treatment failure can lead to unplanned production shutdowns, compliance risks, and significant costs. That is why Envanio places special emphasis on robust system design, heavy-duty manufacturing quality, and comprehensive service throughout the entire equipment lifecycle.

By tailoring exhaust treatment to each specific process and using energy-efficient system designs, Envanio helps optimize your energy consumption operating costs. Integrating heat recovery – or, where applicable, acid recovery – and recirculating these resources back into production significantly increases overall cost-effectiveness.

Yes. Envanio helps companies reduce their carbon footprint through energy-efficient plant designs and electrically heated RTO systems as an alternative to conventional fossil fuels.

Envanio has more than 60 years of experience in environmental technology, with thousands of systems installed worldwide. This proven experience is built directly into our reliable, field-tested solutions for demanding industrial applications.

Yes. Envanio offers comprehensive services throughout the entire lifecycle of the system, including troubleshooting, inspection, preventative maintenance, and genuine replacement parts. In addition, we provide targeted retrofits to optimize your systems technically and thermally, facilitate compliance with evolving environmental regulations, and extend service life.