2026-04-10Views：
Why should ordinary oil injection screw air compressor be replaced by water lubrication air compressor?
Let's first understand what is the oil content of the air.
Compressed air as the second largest power energy after electricity, its application in all walks of life. Different industries have different requirements for the quality indicators of various pollutants in compressed air. Some industries have higher requirements for the quality of compressed air, and there is no lack of demand for oil-free compressed air.
However, many people usually have the following misunderstandings about oil-free compressed air: Most users only know that they need oil-free compressed air, but the concept of specific indicators is vague.
the oil removal equipment for compressed air on the market usually uses conventional filter purification equipment. The technology itself has the disadvantage that it cannot achieve continuous deep oil removal effect. In addition, few enterprises are equipped with oil content detection equipment. Therefore, once the compressed air quality does not meet the standard, most of them are simply considered to be pure oil pollution. Users generally believe that the gas produced by oil-free air compressors is oil-free compressed air.
In view of the above situation, we are here to explore the oil-free compressed air, mainly from the following issues to analyze.
1. What is oil in compressed air
there are clear definitions in ISO 8573-1-2010 "Compressed air Part 1 Contaminants and purity classes" and GB/T 13277.2-2015 "Compressed Air Part 2: Measurement Method of Suspended Oil Content": Oil refers to hydrocarbon mixtures composed of 6 or more carbon atoms (C6), collectively referred to as oil.
2. What is oil-free compressed air
before understanding oil-free compressed air, you need to understand the composition of oil in compressed air. Referring to GB/T 13277.1-2008 "Compressed Air Part 1: Pollutant Purification Level" (eqv.ISO 8573-1), it is clear that the oil in compressed air consists of three parts: liquid oil, suspended oil and oil vapor. We think that suspended oil is also a form of liquid oil, but it exists in the state of particles and has been suspended in gas through Brownian motion, oil vapor is a single molecule state exists in the gas. The sum of their contents is the oil content in the compressed air.
It can be seen from Table 1 that among the five levels of compressed air oil content, the level 0 standard is the total oil content ≤ 0.01 mg/m3 content standard formulated by the equipment user or manufacturer, while the oil-free compressed air is the oil content level equivalent to the level 0 standard, which can be quantified into specific index values.
3. The main source of oil in compressed air
in the previous article, we have defined the composition of the total oil content by reference to the standard: liquid oil, suspended oil and oil vapor. The source of the oil in the compressed air is mainly in the following two ways: one is the trace oil contained in the atmosphere itself, which mainly exists in the form of oil vapor, and the oil content varies with the degree of pollution of the air.
The second is the oil brought into the compression cavity through oil lubrication during the compression process. The most serious oil is the oil-lubricated screw compressor, because the air in the compression cavity will be fully mixed with the lubricating oil. The oil content of the compressor exhaust is controlled by the oil and gas separator provided by the compressor. The principle of oil and gas separation is to filter the oil in the compressed air through the collision and agglomeration of droplets and the filter materials with different apertures at a certain flow rate. When the oil and gas separator works normally, the oil content of the suspended oil is 1~3mg/m3, and the oil vapor content depends on the temperature of the compressed air.
4. Oil content in the atmosphere
the definition of oil in compressed air is C6 hydrocarbons, and in areas such as human gathering points, urban environment, industrial production areas and roads, as long as there are human activities, volatile organic compounds will inevitably be emitted to the outside, many of which have a large number of C6 hydrocarbons, so the ambient air must be oily.
As can be seen from the data in Table 2, the content of hydrocarbon compounds in the atmosphere of indoor, road and industrial areas is relatively high. The analysis is mainly due to the production of surrounding factories and enterprises or automobile exhaust emissions. The oil content value will be higher due to the easy accumulation of volatile organic compounds in the closed environment. In view of this, a set of data was also measured in the air compressor room of the factory, and the average value of oil content reached 0.297 mg/m.
5. Acquisition of oil-free compressed air
it is generally understood that the compressed air produced by an oil-free air compressor is oil-free, but this is not an accurate understanding. Oil-free lubrication compressor in the compression process without oil directly involved in the lubrication, the basic process can ensure that there is no oil pollution, but the oil in the ambient air can not be ignored, so the oil-free air compressor can not do a full range of our oil-free compressed air escort.
It is difficult to achieve the production of oil-free compressed air only by oil-free air compressors, and the most effective method is to configure reliable post-processing oil removal and purification equipment at the back end. With reliable oil removal and purification equipment support, the front-end air compressor is not limited to oil-free air compressor, the use of oil-lubricated air compressor can also achieve the acquisition of oil-free compressed air, which has a large number of examples in actual production. Therefore, after eliminating misunderstandings and re-understanding, how to obtain high-quality oil-free compressed air can have a correct direction.
If you need to purchase water-lubricated air compressors, oil-free air compressors and screw air compressors, you can contact Xiao Shen of Shanghai granklin group at any time. we will provide you with a brand-new stainless steel machine. the air compressor machine does not contain oil. Water is used as the lubricating medium to lubricate the air compressor head.
Granklin water-lubricated single screw air compressor is an oil-free air compressor series, which uses water as the lubricating medium to fundamentally solve the problem of environmental pollution caused by lubricating oil. Compared with other oil-free air compressors, it has a simple and compact structure; low speed
In the field of high gas quality requirements, such as textile, metallurgy, food, chemical industry, medicine, petroleum and air separation and other places that need pure oil-free compressed air, oil-free screw compressor can provide high-quality compressed gas to meet various needs, so the application prospect
Air compressor quotation needs professionals to match. Shanghai granklin group, a domestic air compressor manufacturer, is a professional air compressor factory integrating research and development, production and sales. In the air compressor quotation, we use professional knowledge and technical reserves to customize services from user needs to better serve users.
View detailsHello, our factory specializes in producing "granklin brand" water-lubricated air compressors. Our factory is in Shanghai. You can take a look at our case. Water lubricated oil-free air compressor is generally a single screw air compressor, single screw water lubricated oil-free air compressor is used for compressor lubrication medium is water, using water as a seal, completely oil-free, pure oil-free compressed air, completely changed the production environment of some industries.
Water-lubricated variable frequency energy-saving air compressor, Granklin Group, from design to manufacturing, everywhere reflects our pursuit of energy saving, cleanliness and environmental protection. From water lubrication to non-corrosive host housings, from stainless steel screws to silicon carbide sliding bearings that never rust, from high-efficiency air filters to precision lubricated water filters, we ensure that all host components are oil-free.
View detailsScrew air compressor exhaust temperature is high, why more and more manufacturers choose the water lubricated air compressor produced by Shanghai Grankering Group? Screw air compressor has a special PLC master controller, which can display the operating status, operating temperature, pressure, current, voltage and other common faults 1. high exhaust temperature.
View detailsEnergy conservation and environmental protection is always advocated by our country, and the R & D teams of manufacturing enterprises are also trying to develop energy-saving equipment. The screw air compressor, as one of the important gas equipment for production enterprises, will inevitably cause environmental pollution in the process of use.
The water-lubricated air compressor produced by Shanghai Granklin Group can be produced from 5.5 kW to 250 kW models. In the water-lubricated air compressor products, we have a number of patents, fully localized air compressor core components to reduce the cost of gas companies to purchase air compressors.
View details"Air compressor" is mainly used to pressurize gas and some transportation and other operations of the machine. The general structure of the "air compressor" is similar to the water pump we are familiar with. It is widely used in many production and manufacturing industries. The "air compressor" also has many unique functions and uses.
Water lubricated screw air compressor host, water vapor cylinder, water filter and air filter, intake valve, cold dryer, air storage tank, etc. are integrated into one, forming an integrated air compressor system. The built-in three filters are easy to maintain, and there is no pipeline loss inside. It takes up very little space and is the key first step in forming a small lightweight air compressor; at the same time, it also provides
2018 Granklin Group. All rights reserved 沪ICP备18000439号-2
