Air compressor and compressor are not the same thing

Air compressor and compressor are not the same thing

I wonder if you have such a misunderstanding: an air compressor is a compressor. In fact, there is still a big difference between the two. Make some summary comparisons between the two (including manufacturers). Air compressors and compressors are actually two different mechanical products.

　　 process compressor can compress a variety of gas media, such as hydrogen, nitrogen, chlorine, oxygen, etc., used in the air separation industry to produce nitrogen and oxygen. Air compressors are mainly compressed air, which are used in many industries except chemical industry;

　　 There are many companies doing air compressors, but not many companies doing process compressors. Process compressor companies are generally able to produce units with different compression processes.

　　 The difference between the two concepts

　　 Air compressor is an air compressor. It is mainly a mechanical product used to compress air and is used in many places. For example, one of the most commonly used functions of an air compressor is the ability to compress air to be used as power, which is widely used in the power industry. In addition, it can also be used to refrigerate and separate gas, transport gas and so on. It plays a very important role in life and work.

　　 and compressor is the general term. And there are many types of compressors, such as refrigerant compressors, hydrogen compressors and air compressors. An air compressor is just one type of compressor. Its compression medium is air, and the compressor can be used to compress many things, not just air. Therefore, the distinction between air compressors and compressors is like the Chinese and human beings. The Chinese are included in the category of human beings, and the air compressor is included in the overall concept of the compressor, which is a type of compressor.

　　 Most people think that an air pump is an air compressor. But the air pump mentioned a long time ago is a piston type air compressor, now there are many types of air compressors, screw compressors, oil-free compressors, energy-saving frequency conversion air compressors and so on. The principle of air pump and air compressor is still different.

　　 Principle of Both

　　The working principle of air compressor:

　　 Let's take the screw air compressor as an example. The working cycle of the screw compressor can be divided into three processes: air intake (1), compression (2, 3) and exhaust (4). As the rotor rotates, each pair of meshing teeth completes the same work cycle one after another.

1. Intake process: When the rotor rotates, the tooth groove space of the female and yang rotor turns to the opening of the inlet end wall, and its space is the largest. At this time, the rotor tooth groove space is connected to the air inlet because of the gas in the tooth groove during exhaust. It is completely exhausted. When the exhaust is completed, the tooth groove is in a vacuum state. When it is turned to the air inlet, the outside air is sucked in and enters the tooth groove of the female and male rotor along the axial direction. When the gas fills the entire tooth groove, the rotor inlet side end surface turns away from the casing air inlet, and the gas in the tooth groove is closed.

　　2. Compression process: When the yin and yang rotor is inhaled, the tooth tip of the yin and yang rotor will be closed with the casing, and the gas will no longer flow out in the tooth groove. The meshing surface gradually moves toward the exhaust end. The tooth groove space between the meshing surface and the exhaust port gradually becomes smaller, and the compressed gas pressure in the tooth groove increases.

　　3. Exhaust process: When the meshing end surface of the rotor turns to communicate with the exhaust port of the casing, the compressed gas begins to be discharged until the meshing surface of the tooth tip and the tooth groove moves to the exhaust end surface. The tooth groove space of the exhaust port of the casing is 0, that is, the exhaust process is completed. At the same time, the length of the tooth groove between the meshing surface of the rotor and the intake port of the casing reaches the longest, and the air intake process is performed again.

　　The working principle of process compressor:

　　 Let's take a common centrifugal compressor as an example. The steam turbine (or electric motor) drives the compressor main shaft impeller to rotate. Under the action of centrifugal force, the gas is thrown into the diffuser behind the working wheel. A thin zone is formed in the middle of the working wheel. The gas in front enters the impeller from the steam inlet part in the middle of the working wheel. Due to the continuous rotation of the working wheel, the gas can be continuously thrown out, thus maintaining the continuous flow of gas in the air compressor. The gas increases the pressure due to the centrifugal effect, and can also leave the working wheel at a great speed. The gas gradually reduces the speed through the diffuser, and the kinetic energy is transformed into static pressure energy, which further increases the pressure. If the pressure obtained by a working impeller is not enough, the outlet pressure can be achieved by connecting multiple impellers in series. The series connection between the stages is realized by means of elbow and reflux. This is the working principle of a centrifugal compressor.

　　Both companies situation

　　 For process compressors and air compressors, there are more manufacturers of air compressors.

　　 process compressor manufacturer:

　　 1. Shaanxi Blower (Group) Co., Ltd.

　　 was built in 1968 and completed and put into production in 1975. Shaangu's products and services are widely used in the pillar industries of the national economy such as petroleum, chemical industry, metallurgy, air separation, electric power (including nuclear power), urban construction (subway), environmental protection, pharmaceuticals, and road construction. Shaangu is a system solution provider and system service provider that mainly provides distributed energy to users, and has formed three business segments of "energy conversion equipment manufacturing, industrial services, and energy infrastructure operations". Among them, the manufacturing of energy conversion equipment in the first segment includes various types of turbo compressors, blowers, fans, industrial energy recovery turbines, steam turbines, instrumentation, industrial boilers, military modified vehicles, road machinery, etc.

　　 Shaangu has been committed to the research of air separation compressor units since 2002, and is now able to independently provide the supporting compressor capacity of 20,000-120,000 air separation units. For air separation compressor products, there are mainly centrifugal compressors (EIZ), air boosters using multi-stage single-shaft compressors (EZ, EBZ) and multi-shaft compressors (EG). The above multiple combinations can meet different needs.

　　2. Shenyang Blower (Group) Co., Ltd.

Shengu Group is a pillar and strategic leader in China's major technical equipment industry. At present, Shengu has a million-ton ethylene compressor unit, 10 million-ton oil refining unit, 100,000 air separation, large-scale PTA, large-scale LNG, and large-scale MTO , Large-scale long-distance pipeline compressor, 150-ton high-thrust reciprocating compressor, and AP1000 nuclear main pump, nuclear secondary pump, nuclear tertiary pump, national defense and navy equipment pumps and other major technical equipment R&D and manufacturing capabilities. The design and manufacturing technology has reached the international advanced level.

Shengu has a national-level compressor test base. The compressor test bench of Shengu Group has 30,000-kilowatt fuel drive, 50,000-kilowatt electric drive, and 100,000-kilowatt steam turbine-driven full-speed, full-pressure and full-load operation and steam dynamic performance test capabilities. The international leading level large-scale turbo compressor test base.

　　 Air compressor manufacturer:

　　 World-renowned air compressor companies: Taiwan Fusheng, Atlas Sweden, Ingersoll Rand, Sullair (acquired by Hitachi, Japan this month).

　　American Ingersoll Rand Compressor Co., Ltd.

Ingersoll Rand began producing centrifugal compressors in 1911, and installed the world’s first 100 m3/h steam turbine-driven multi-stage air compressor in 1912. In 1928, it launched the compressor energy recovery system, 1940 Centrifugal compressors used in catalytic cracking were produced in 1949, steam turbine-driven centrifugal compressors were produced in 1949, and assembled centrifugal compressors were launched in 1958. After the successful development of Ingersoll Rand's CENTAC centrifugal air compressor (multi-shaft gear drive combined centrifugal compressor), it has been popular among users. So far, 12,000 units have been in safe and long-term stable operation all over the world.

Ingersoll Rand announced strong growth in its financial report for the first quarter of 2017. Orders in the first quarter increased strongly, reaching 6%; orders for self-owned businesses increased by 7%; sales increased by 4%, and sustained earnings per share in the first quarter For 0.47 US dollars; adjusted continuous earnings per share reached 0.57 US dollars, an increase of 14%.

　　 Fusheng Industrial Co., Ltd.

　　 Fusheng established a joint-stock company in 1953, and currently has cutting-edge automation equipment. Fusheng products involve stationary air compressors, mobile air compressors, refrigeration compressors, air compressors for new energy vehicles, diesel generators, Roots blowers and other fields.