In the dry mortar production line, a double shaft gravityless dry mortar mixer is used, which uses a pneumatic door-opening method. The automatic valve bag filling machine adopts air pressure packaging, which needs to be used with air compressors, as well as air pressure butterfly valves, pulse dust collectors and other devices. All in all, the air compressor plays a very important role in the entire dry mortar plant, and the choice of air compressor is also very important.
At present, there are many types of air compressors on the market. Small-sized air compressors, such as air pumps for cars and tractors, and large-sized air compressors, such as air pumps for mountain and mining, cost from several thousand RMB to Hundreds of thousands RMB.
How to choose an air compressor? This question is not only related to how to control the budget reasonably, but also related to the economic cost of the production line and whether it is reliable.
Air compressor is a compressor that compresses air. It is widely used in industries such as mechanical mining, chemical industry, petroleum, transportation, construction, navigation, etc. With the economic development, the use of air compressors can be seen everywhere.
In China, the discharge pressure of the air compressor is 0.7MPa or 0.8MPa, if it is higher or lower than this, it is a non-standard air compressor. Di Hai Machinery supports customization of various air compressors. Please contact us if you need it.
The classification of air compressor has the following methods：
1. According to the gas volume
Air volume refers to the gas discharged every minute when the air compressor works, which is converted into volume. The displacement of the minicomputer is less than 10 cubic meters per minute, the displacement of the medium-sized machine is 10-100 cubic meters per minute, and the displacement of the mainframe is 100 cubic meters per minute.
China's air compressors have 0.3, 0.6, 0.9, 1.6, 3, 6, 9, 10, 12, 20, 40, 60, 100 and so on.
2. According to the structure of the air compressor, it can be divided into the screw type and piston type
Due to the complicated rotor profile and high manufacturing cost, screw compressors have the advantages of small size, light weight and small parts. At the same displacement, screw compressors are more expensive than piston compressors.
3. According to the cooling method
The air compressor can make the temperature rise when the gas is compressed, so a cooler is required.
According to the cooler mode, it is divided into water cooling and air cooling. Water cooling uses water circulation cooling; air cooling uses fan cooling.
4. According to the driving, it can be divided into electric air compressor and diesel air compressor.
5. Air compressors can also be divided into fixed and mobile.
Economy, reliability and safety of the air compressor.
The size of the air displacement is one of the main parameters of the air compressor. The selected air compressor should match the required air displacement and leave a 10% margin. If the exhaust volume used is large and the air compressor exhaust volume is small, the exhaust pressure of the air compressor will be reduced, and the pneumatic tool cannot be driven. Of course, it is also wrong to blindly pursue a large displacement, because the larger the displacement, the larger the compressor motor, which will not only increase the cost, but also waste power resources. In addition, when choosing the exhaust volume, the size of the exhaust volume used during peak hours should also be considered.
Consider the quality of the air compressor.
Generally, the compressed air of an air compressor contains a certain amount of lubricating oil and a certain amount of water. In some cases, oil and water are prohibited. In this case, you need to pay attention to adding additional devices when selecting an air compressor.
There are two solutions:
1. Use a non-lubricating air compressor. The cylinder of this air compressor is basically free of oil, and its piston ring and packing are generally polytetrafluoroethylenes. This machine also has its shortcomings. First, it is poorly lubricated and has a high failure rate. In addition, PTFE is also a harmful substance, and it cannot be used in the food and pharmaceutical industries.
2. Therefore, the common practice is to add one or two purification devices or dryers to the air compressor. This device can make the compressor air neither oil nor water, so that the oily water content in the compressed air is below 5ppm to meet the process requirements.
Operational safety:
The air compressor is accompanied by temperature rise and pressure, and safety should be the first priority when working. In addition to the safety valve, the air compressor is also equipped with a pressure regulator.
In short, the choice of air compressor is very important. It is recommended that you choose an air compressor with high reputation and good quality. Do not choose an air compressor because of its low price. Otherwise, it will affect the output of dry powder mortar equipment and even endanger life.