Aerosol separation in industrial plants
Aerosol separation is crucial for protecting employee health and ensuring the efficiency of production processes in companies. It removes harmful particles from the air that can cause respiratory illnesses and improves workplace air quality. Furthermore, aerosol separation contributes to compliance with legal regulations such as the Federal Immission Control Act and minimizes the risk of legal consequences for companies.
Separation enables sustainable production by recovering and reusing materials, thus reducing operating costs. Aerosol separators stabilize manufacturing processes, increase product quality, and minimize physical risks such as explosions caused by flammable particles.
Legal regulations for aerosol separation in Germany
In Germany, aerosol separation is subject to strict legal regulations designed to protect the environment and public health. The most important regulations and their functions are summarized below:
- Federal Immission Control Act (BImSchG)
- Technical guidelines on air pollution control (TA Luft)
- 22nd Regulation for the Implementation of the Federal Immission Control Act
- 33rd Ordinance for the Implementation of the Federal Immission Control Act (33rd BImSchV)
1. Federal Immission Control Act (BImSchG)
The Federal Immission Control Act (BImSchG) first came into force in 1974 and is the most important legal basis for protection against harmful environmental impacts in Germany. It sets clear limit values for emissions from industrial processes, such as particulate matter (PM10), nitrogen oxides (NOx), and sulfur dioxide (SO₂), and serves to protect the environment and public health. Monitoring is carried out by the responsible authorities, who ensure that companies comply with legally prescribed immission limits. Furthermore, the Act authorizes the Federal Government to issue regulations such as the 22nd and 33rd BImSchV (Ordinances on the Immission Control of Federal States). Violations of the BImSchG can result in substantial penalties, with fines of up to €50,000.
- First version: 1974
- Maximum fines: up to 50,000 euros
- Important pollutants: particulate matter (PM10), nitrogen oxides (NOx), sulfur dioxide (SO₂)
- Competent authorities: e.g., environmental agencies, state environmental agencies
2. Technical Instructions on Air Quality Control (TA Luft)
The Technical Instructions on Air Quality Control (TA Luft) are an administrative regulation that has been in effect since 1964 and specifies the requirements of the Federal Immission Control Act (BImSchG). They establish specific limit values for pollutants from industrial processes, such as particulate matter, heavy metals, volatile organic compounds (VOCs), and greenhouse gases. In the updated version of 2021, the emission limit values were further tightened to improve air quality. The TA Luft also contains detailed requirements for the monitoring, measurement methods, and reporting of emissions. Companies are obligated to conduct regular measurements and submit the results to the relevant authorities. The regulations are particularly stringent for emissions from large combustion plants, which produce significant quantities of nitrogen oxides and particulate matter.
- First version: 1964
- Updated version: 2021
- Important pollutants: VOCs, heavy metals, particulate matter, nitrogen oxides
- Measurement obligation: regular monitoring and reporting
- Limit value for particulate matter: 20 mg/m³ for many industrial sectors
3. 22nd Regulation for the Implementation of the Federal Immission Control Act
The 22nd Ordinance Implementing the Federal Immission Control Act (22nd BImSchV) is one of several ordinances that implement EU directives on air pollution control. It came into force in 2004 and primarily affects large industrial facilities such as refineries, steelworks, and power plants. This ordinance regulates emission limits for pollutants such as nitrogen oxides (NOx), sulfur dioxide (SO₂), and particulate matter (PM). The aim is to drastically reduce air pollution in Europe and protect public health. Companies subject to this ordinance must comply with strict emission requirements and continuously monitor and report their emissions. Violations can result in heavy fines and production shutdowns.
- Entry into force: 2004
- Key facilities: refineries, steelworks, power plants
- Limit values for nitrogen oxides: max. 150 mg/m³ for large combustion plants
- Linkage with EU directives: Implementation of the EU Clean Air Directive
4. 33rd Ordinance for the Implementation of the Federal Immission Control Act (33rd BImSchV)
The 33rd Ordinance Implementing the Federal Immission Control Act (33rd BImSchV) aims to reduce specific pollutants that cause summer smog, acidification, and excessive nutrient inputs into the environment. It entered into force in 2001 and was last updated in 2017. This ordinance sets limit values for particulate matter (PM10 and PM2.5), sulfur dioxide (SO₂), nitrogen oxides (NOx), and ammonia. It is particularly relevant for sectors such as agriculture and the chemical industry, which generate large quantities of nitrogen oxides and ammonia. The 33rd BImSchV is especially important in urban and heavily polluted regions because it aims to reduce particulate matter and other harmful substances.
- Entry into force: 2001, last updated 2017
- Important pollutants: PM10, PM2.5, SO₂, NOx, ammonia
- Goal: Reduction of summer smog and acidification
- Limit values for particulate matter (PM10): 40 µg/m³ (daily average)
Health hazards of aerosols for employees
Aerosols in industrial work environments pose significant health risks to employees. These hazards include various health impairments, which can be both acute and chronic:
- Respiratory diseases
- Toxic effects
- Carcinogenic effects
- Skin and eye irritation
1. Respiratory diseases
Aerosols, especially those containing biological substances such as bacteria, fungi, or viruses, can trigger serious respiratory illnesses. Bioaerosols are common in industrial and medical settings and can cause infectious diseases such as Legionnaires' disease or tuberculosis. With repeated or long-term exposure, these particles can also lead to chronic respiratory illnesses and increase the risk of cardiopulmonary disease. Employees in areas with high aerosol levels are particularly vulnerable, as these particles can become deeply embedded in the lungs and cause permanent lung dysfunction.
2. Toxic effects
Many aerosols contain harmful chemicals that have toxic effects on the human body. Substances like xylene, commonly used in industrial processes, can cause acute symptoms such as headaches, dizziness, and shortness of breath when inhaled. Long-term exposure increases the risk of chronic health problems, including damage to the nervous system and internal organs. The severity of the toxic effects depends on the duration of exposure and the concentration of aerosols in the air, necessitating regular monitoring and protective measures.
3. Carcinogenic effects
A particularly serious risk associated with exposure to aerosols is the potentially carcinogenic effect of certain particles, especially fine particulate matter (PM2.5). These extremely small particles penetrate deep into lung tissue and can cause cell damage, increasing the risk of various cancers. Studies have shown that long-term exposure to these fine aerosols can promote the development of lung cancer as well as other tumors. Industries with high levels of fine particulate matter must therefore adhere to strict safety protocols to minimize the cancer risk for their employees.
4. Skin and eye irritation
In addition to the risks of inhalation, aerosols can also cause skin and eye irritation upon direct contact with the skin or mucous membranes. This is particularly common in work environments where chemical or biological aerosols are released, such as in chemical production or waste management. Direct contact with these particles can lead to inflammation, itching, or more serious dermatological problems. Eye irritation can be triggered by aerosols that spread through the air, impairing vision and eye health. Protective measures such as personal protective equipment (PPE) are therefore essential to minimize these health risks.
Which aerosol separators are commonly used in industrial plants?
Various aerosol separators are used in industrial plants to remove pollutants from the air and ensure a safe working environment. The most common devices include:
- Oil mist separator
- centrifugal separator
- Electrostatic precipitator
1. Oil mist separator
Oil mist separators are widely used in industry, particularly in metalworking, to remove fine oil and emulsion particles from the air. These particles are frequently generated during the use of cooling lubricants (CMLs) in machining processes such as turning, milling, or grinding. Oil mist separators typically operate on the principle of mechanical filtration. The oil particles are passed through special filter stages that capture and separate them. Depending on the type of unit, the separated oil mist is collected, and the captured oil can be reused, thus reducing material consumption and lowering operating costs.
2. Centrifugal separator
Centrifugal separators, also known as cyclone separators, utilize the physical force of centrifugal force to separate particles from an airflow. Once the airflow containing the particles enters the separator, it is set into a rotating motion. Due to the centrifugal force, the heavier particles, such as dust, dirt, or liquid droplets, are forced against the walls of the separator, while the clean air escapes. This type of separator is particularly effective at removing coarse particles and is commonly used in manufacturing and heavy industries.
Centrifugal separators are primarily used in applications such as wood and cement processing, metallurgy and plastics production, where larger quantities of solid particles and aerosols are released into the air.
3. Electrostatic precipitator
Electrostatic precipitators, also known as electrostatic precipitators, use electric fields to remove the finest particles and aerosols from the air. Their operating principle is based on the ionization of airborne particles. The airflow is passed through a strong electric field, which electrically charges the particles. These charged particles are then attracted to and adhere to oppositely charged plates, while the purified air is released.
Electrostatic precipitators are frequently used in industries that generate fine and hazardous particles, such as flue gas cleaning, cement production, waste incineration, and metalworking processes. They are particularly effective at removing ultrafine particles that are difficult to capture with mechanical filters, such as fine dust (PM2.5) or smoke particles.
What impact does oil mist have on the risk of accidents in factories?
Oil mist increases the risk of accidents in factories due to slippery surfaces, which can lead to falls. The oil mist impairs machinery through deposits, causes malfunctions, and increases maintenance requirements. Furthermore, there is an increased fire hazard because oil mist is highly flammable, especially near heat sources. These factors result in higher operating costs and reduced efficiency.
Oil mist separator Oilmaster from Kaweha
The Oilmaster oil mist separator from Kaweha offers a highly efficient solution for separating oil and emulsion mist in industrial applications. With its three-stage filtration and robust design, it not only ensures compliance with legal limits such as those stipulated by the German Technical Instructions on Air Quality Control (TA Luft), but also achieves a residual concentration of less than 1 mg/m³ in the purified air.
The Oilmaster is specifically designed for continuous operation on production lines, reliably protecting employee health while minimizing environmental impact. Thanks to its integrated frequency converter, the operating point can be optimally adjusted, and low maintenance combined with long filter life ensures maximum efficiency. Whether CNC machines, EDM processes, or plastic extrusion – the Oilmaster guarantees safe and sustainable air purification.
October 23, 2024
