Air compressor exhaust gas cleanliness analysis
air compressor as a basic equipment in the industrial field, the cleanliness of the exhaust gas (especially the oil and moisture content) is directly related to the safe operation of the gas equipment and product quality. The following from the air compressor type, gas treatment technology, cleanliness factors and selection recommendations four aspects of the analysis, to help enterprises scientific understanding of gas cleanliness issues.
1. air compressor type and gas cleanliness
- oil air compressor
- working principle: Lubricating oil participates in the compression process to achieve cooling, lubrication and sealing.
- Gas cleanliness: The exhaust gas contains trace oil (usually less than 0.1 mg/m & sup3;), which needs to be further purified by post-processing equipment (such as oil-water separator and precision filter) to meet the scene with high gas quality requirements.
- Oil-free air compressor
- working principle: Water or other alternative lubricating materials are used, and no oil is involved in compression throughout the process.
- Gas cleanliness: The exhaust gas is theoretically free of oil, but may contain a small amount of water. It needs to be processed by drying equipment (such as freeze dryer and adsorption dryer) to achieve oil-free and water-free gas output.
2. gas treatment technology and cleanliness improvement
- oil removal technology
- oil-water separator: Through the principle of centrifugal separation and filter element filtration, the oil in the gas is removed.
- Precision filter: Use multi-stage filter elements (such as glass fiber and activated carbon) to further filter small oil droplets and particles to ensure that the oil content of the gas is less than 0.01 mg/m & sup3;.
- drying technology
- freeze dryer: The gas is cooled to below the dew point temperature through refrigeration technology, so that the water vapor is condensed into liquid water, and then discharged through the gas-water separator.
- adsorption dryer: Use the adsorption properties of adsorbents (such as activated alumina, molecular sieves) to remove the moisture in the gas and achieve deep drying.
3. Core Factors Affecting Gas Cleanliness
- air compressor type
- the oil air compressor needs to purify the gas through the post-processing equipment, and the oil-free air compressor needs to process the water through the drying equipment.
- Post-processing equipment configuration
- the selection and configuration rationality of oil-water separator, precision filter and dryer directly affect the cleanliness of gas.
- Maintenance quality
- regularly replace the filter element and desiccant, clean the separator, and ensure the continuous and efficient operation of the aftertreatment equipment.
- Operating environment
- high environmental humidity and dust may aggravate gas pollution, so it is necessary to strengthen air filtration and equipment protection.
4. selection suggestion: select gas cleanliness scheme according to demand
- scenarios requiring gas cleanliness
- medical, food, electronics and other industries: Oil-free air compressor should be selected, and precision filter and adsorption dryer should be equipped to ensure that the gas is oil-free and water-free.
- Laboratory, research field multi-stage filtration and drying equipment is required to meet the needs of high-precision experiments.
- Scenarios with general requirements for gas cleanliness
- general industrial production: Oil air compressor can be selected, and basic oil-water separator and refrigeration dryer can be equipped to meet the basic gas demand.
- Special environmental adaptability
- high temperature and high humidity environment air filtration and equipment protection shall be strengthened to avoid gas pollution.
- Dust multi-environment: Need to configure high efficiency air filter, reduce particles into the air compressor.
Gas cleanliness requirements for 5. typical scenarios
| Scene Type | gas cleanliness requirements | recommended Configuration |
|---|
| medical/Pharmaceutical | oil-free, water-free, sterile | oil-free air compressor precision filter adsorption dryer |
| food/Beverage | no oil, no water, no smell | oil-free air compressor activated carbon filter freeze dryer |
| electronics/Semiconductors | no oil, no water, no particles | oil-free air compressor HEPA filter adsorption dryer |
| general machining | trace oil and moisture controllable | oil-water separator refrigeration dryer with oil air compressor |
air compressor exhaust gas cleanliness depends on the type of air compressor, after-treatment equipment configuration, maintenance quality and operating environment. Enterprises in the selection, according to the specific application scenarios of gas cleanliness requirements, select the appropriate type of air compressor and post-processing program, to ensure the safe operation of gas equipment and product quality.
