Turbine compressor and positive displacement compressor have their own advantages.

With the prosperity of single-series process flow and the continuous expansion of economic production scale, as well as the breakthrough and perfection of high exhaust pressure technology of turbine compressor, the reliability of uninterrupted long-period continuous operation has been ensured. The super-large compressors used in synthetic ammonia, air separation, chemical industry and petrochemical industry abroad have been mainly turbines. So is the compressor selection trend of domestic owners.

Undoubtedly, turbocompressor has the characteristics of being most suitable for large flow and super capacity, and it is more convenient when the exhaust pressure is lower than the medium pressure.

Positive displacement compressors (mainly reciprocating piston compressors and positive displacement rotary compressors) which do not have the above advantages of turbo compressors are outstanding in the field of ultra-high pressure and ultra-high pressure, and also have the characteristics of high cost performance and energy-saving operation under the conditions of high pressure, medium pressure and small and medium flow.

Although the range of performance parameters (flow and pressure) that can be achieved by turbo compressor and positive displacement compressor slightly overlap, on the whole, they have their own strengths and complement each other.

Development trend of reciprocating piston compressor for process flow

1. At present, there are three hot spots in the manufacture, sales and technical development of reciprocating piston compressors for technological processes at home and abroad:

A. Multi-media compressors such as medium and large power and medium and high pressure hydrogen for various devices and processes in oil refining and petrochemical (downstream) enterprises.

B. Multi-variety, medium-high-power, medium-high pressure natural gas compressors for natural gas gathering and transportation and natural gas reinjection for oil production (or gas injection into underground gas storage) in oil and gas (upstream) enterprises.

C. CNG compressor for natural gas vehicle filling station.

2. Labyrinth compressor

Labyrinth compressor is one of the reciprocating piston compressors used in the process. Through careful design and fine manufacturing, the gas seal between the cylinder and the packing is realized in a non-contact way. Therefore, it is not only a kind of cylinder oil-free lubrication compressor, but also the only choice under ultra-high temperature or ultra-low temperature conditions, or when compressing absolute dry gas. It is more sanitary and reasonable to use labyrinth compressor than contact ring cylinder oil-free lubrication compressor when brewing beverage factory delivers compressed gas in direct contact with food and beverage to production workshop. Relatively speaking, labyrinth compressor is superior to other compressors in pharmaceutical technology and safety of oxygen making device.

Therefore, the labyrinth compressor will be widely and deeply applied.

Main service areas of compressor manufacturing industry in China

1. Supporting major technical equipment of the national economy, such as providing large and super-large hydrogenation compressors for various large-scale oil refining units and coal chemical plants, large and medium-sized natural gas compressors for gathering and gas injection of various specifications for the natural gas industry, large and medium-sized nitrogen-hydrogen compressors and carbon dioxide compressors for the fertilizer and explosive industries, and air compressors for power supply for the coal, metallurgical, electric power, textile, medicine and food and beverage industries.

2. Provide various CNG compressors and LPG compressors, improve the environment, improve the energy structure of environmentally-friendly clean fuel vehicle filling stations, and provide key equipment for natural gas vehicles or liquefied petroleum gas vehicle filling stations.

3. Serving a wide range of compressed air applications, from large-scale mining, ferrous metal/nonferrous metal/rare metal smelting, small and medium-sized air separation devices, small and medium-sized pressure swing adsorption gas making devices, road and building construction to various household gas purposes.

The Leap of Compressor Manufacturing in China

1, process flow of large reciprocating piston compressor

On a global scale, the hot spot of large reciprocating piston compressor for process flow is the hydrogenation compressor needed by refineries in petrochemical industry, and China is one of the hottest hot spots, with strong demand and competition.

An important aspect of China's energy security strategy is to promote large-scale coal liquefaction projects. Super-large hydrogen compressor is an indispensable core equipment.

Shenyang Gas Compressor Co., Ltd., Wuxi Compressor Co., Ltd., Shanghai Compressor Co., Ltd., Shanghai Dalong Machine Factory, Sichuan Dachuan Compressor Co., Ltd., Weifang Shengjian Compressor Factory, Hangzhou Hangyang Compressor Co., Ltd. and other powerful enterprises have a high domestic market share and provide many key equipment for petrochemical, chemical, oil and gas, industrial gas and other industries-large reciprocating piston compressors of various specifications.

Among them, Shenyang Gas Compressor Co., Ltd. successfully combines independent research and development with technical cooperation, and has the proprietary technology of world-class large-scale reciprocating piston compressor (piston force 100 KN ~ 1250 KN) to manufacture a full range of large-scale symmetrical balanced compressors, with the maximum power of 5000kW, the maximum piston force of 800kN and the maximum number of rows. Its main structural features are three:

A. The mechanical hydraulic connection between the piston rod and the crosshead, with the application and release of superhigh oil pressure of three times 150MPa, produces the pre-stressed elastic stress part, which effectively reduces the inevitable high stress amplitude of the piston rod in pure mechanical connection, and there is no serious stress concentration at the thread root of the large-diameter piston rod with traditional structure, thus ensuring the reliable operation of the piston rod.

B. The design of multi-row combined fuselage with strong rigidity optimized by mechanical treatment, because the fuselage has no wall perpendicular to the stress direction, thus obtaining large bearing capacity.

C. The transmission mechanism of the compressor is "reverse lubrication", and the crankshaft does not need oil holes, so it has no stress concentration at multiple oil holes of the traditional crankshaft, high strength, good rigidity, easy processing, higher specific pressure at the crosshead pin/crosshead tile, lower minimum oil pressure and higher maximum oil pressure. Therefore, the transmission mechanism has small wear, low temperature rise and small thermal expansion value, and it is easy to ensure the accurate linearity of piston rod movement.

Obviously, the safety and reliability of its compressor are guaranteed.

The large reciprocating piston compressor produced by Shenyang Gas Compressor Co., Ltd. ranks among the largest compressors in the world in terms of single machine power and piston force. For example, the 4M80-30/22-200-BX new hydrogen compressor successfully operated in super-large petrochemical enterprises such as Maoming Petrochemical Company in Guangdong Province is a 2 million tons/year residual oil desulfurization and hydrogenation device, with four rows, piston force of 800kN, exhaust pressure of 20MPa, shaft power of 3250kW, mass of 68.6t, and auxiliary machine mass such as cooler16.2 t.

Generally speaking, due to the joint efforts of Industry-University-Research, a compressor manufacturing company in China, domestic large reciprocating piston compressors not only successfully replaced imported machines, but also outperformed some imported machines in actual operation. Because of its comprehensive cost-effective advantage, it has good conditions to go overseas with petrochemical complete sets of equipment. And this has already been implemented.

2. Split and integral gas motorcycle natural gas compressor sets

Under the impact of pipeline gas turbine-centrifugal natural gas compressor unit, the high-power (up to 10067kW[ 13500HP]) integral gas motorcycle compressor gradually withdrew from the historical stage. At present, the compressors of the integral gas motorcycle are symmetrical balanced structures, and the power cylinder and the compression cylinder are laid horizontally symmetrically, and the pistons of the power cylinder and the compression cylinder move in opposite or opposite directions, so that the inertia force balance is excellent, and it is low-speed, heavy-load, durable, needs no personnel on duty, and has low operating cost and power below 630kW.

This gas motorcycle compressor unit is a skid-mounted organic whole consisting of a power cylinder burning natural gas and a compression cylinder compressing natural gas, which does not need external power supply and water supply, and the cooling, lubrication, ignition and automatic control systems of the unit do not need external power supply. Obviously, it is an ideal gathering and transportation equipment for dispersed oil and gas fields, marginal oil and gas fields and later oil and gas fields without power or power connection difficulties.

China Petroleum and Natural Gas Group Corporation, Sichuan Petroleum Administration Bureau, Chengdu Natural Gas Compressor Factory and Sichuan Dachuan Compressor Co., Ltd. are the most important suppliers of integrated gas motorcycle compressors for vast oil and gas fields in China. Among them, there are nearly 300 ZTY series products manufactured by Chengdu Natural Gas Compressor Factory, which have good running performance.

"Split" large-scale natural gas compressor unit is the main type of oil and gas gathering and transportation, which is mostly directly driven by high-power and high-speed natural gas engine (or directly driven by motor), isomorphic with large-scale air-cooled cooler, forming an independent skid-mounted unit, and is an indispensable equipment for oil and gas fields.

The RDS series medium and high power (up to 3000kW) compressor units produced by the Third Machinery Factory of Jianghan Petroleum Administration Bureau of China Petrochemical Group (Wuhan Wujiashan) belong to this category, which is the crystallization of the combination of technical cooperation and independent innovation.

3. CNG compressor for natural gas automobile filling station

The reality facing the world is that crude oil can only be mined for more than 40 years, while natural gas can be mined for more than 70 years. China is facing a good situation: focusing on energy diversification, strengthening the west-to-east gas transmission project, vigorously protecting the environment, actively developing/utilizing abundant land/sea natural gas, importing liquefied natural gas, realizing the international networking of natural gas (imported) pipelines in the near future, and increasing the development of rich coalbed methane (the follow-up natural gas of oil and gas fields).

Natural gas vehicles have obvious comprehensive advantages of environmental protection, technology and economy, such as mature technology, cleanliness, safety and good economy.

Since 193 1 built the world's first modern natural gas vehicle filling station in northern Italy and 1988 built the first domestic natural gas vehicle filling station in Rong county, Sichuan province, the variety, sales volume and technical progress of CNG compressors at home and abroad have become increasingly active. Nowadays, CNG compressor has become one of the best selling points in the global compressor market, especially in China, Southeast Asia and South America.

The single power of CNG compressor is not very large, but in recent years, it has highly enriched many advanced technologies of compressor used in contemporary reciprocating piston process. Objectively speaking, CNG compressor has almost become the only reciprocating piston compressor in the global process flow that can form mass production. With the increasing shortage of oil, the urgency of controlling automobile exhaust pollution in cities, the phased implementation of China's west-to-east gas transmission project, and the gradual popularization of gas energy in residential areas, CNG compressors will surely have greater development at home and abroad.

Although it started very late, the domestic CNG compressor almost reached the world advanced level. At the beginning of the new century, it is brilliant and colorful, and its comprehensive technical level has been gradually sublimated from different angles to the level not lower than that of imported products. Therefore, it not only makes new contributions to the construction of domestic natural gas automobile filling stations, but also has the extraordinary strength to compete with well-known foreign brands after China's accession to the WTO and enter the international market at the same time. Due to the high cost performance and low price, the number of domestic CNG compressors sold overseas is gradually increasing, and the countries and regions willing to accept CNG compressors from China are also expanding. Eighty percent of the output value of a private enterprise in Sichuan Province is actually exporting CNG compressors!

The all-air cooling unit of Jianghan No.3 Machinery Factory of China Petrochemical Company is most suitable for operation in arid and cold areas, and it is equipped with a sound insulation cover unit for downtown areas. Many flow models with low suction pressure of 0.3 MPa ~ 0.5 MPa and high suction pressure of 2.0MPa have been successfully developed. The cylinder oil-free lubricating unit of Wuxi Compressor Co., Ltd. has a wide range of low suction pressure (0.2 MPa ~ 0.5 MPa) and excellent gas supply quality. The cooling mode is water cooling and internal cooling of hollow piston rod, which ensures the normal operation of packing and piston ring and can run in urban areas without sound insulation cover. Nanjing compressor co., ltd. has a compact unit with a suction pressure of 0.5 MPa ~ 1.0 MPa and a large gas supply capacity, which is suitable for building a large-scale conventional station/filling master station in the urban high-pressure natural gas pipeline network.

Model 2D4 of No.3 Machine Works, which pioneered the domestic all-air cooled CNG compressor unit and obtained the national patent certificate, began to operate in Zhongyuan Oilfield on 200 1. After the deployment of three filling stations in Chengdu, the filling station of North Second Ring Road of Xi 'an Natural Gas Corporation chose 2D4 mode twice in 2003 and 2004. Under the working condition of heavy load (more than 20 hours a day) without standby machine, this type of unit in several gas filling stations has experienced the test of natural conditions in hot summer and cold, and has been running well so far. Its excellent design and extremely low specific pressure on the bearing surface of transmission parts ensure safety, reliability and long service life.

Chongqing Gas Compressor Factory Co., Ltd., which developed the first domestic CNG compressor, not only expanded the water-cooled units with multiple structures, varieties and types for the station, but also exported them to Southeast Asia. After the Third Machine Factory, it developed air-cooled units and expanded the service area.

Enrique (Bengbu) Compressor Co., Ltd. not only learned from the compressor technology imported from Germany and Austria and related parts of domestic technology, but also provided various kinds of CNG compressors for conventional stations earlier, and also actively developed sub-station machines and parent station machines. In particular, the urban natural gas project implemented by its parent company, Xinao Group, has broadened the application field of its CNG compressor and increased the order volume.

Beijing Jingcheng Environmental Protection Industry Development Co., Ltd. has developed an air-cooled CNG compressor with the required power of 160kW in Shengli Oilfield on the basis of air-tightness test and appraisal of small air-cooled compressors.

Sichuan Dachuan Compressor Co., Ltd., Sichuan Jinxing Compressor Manufacturing Co., Ltd., Zigong Tongda Machine Manufacturing Co., Ltd., Zigong Shanchuan Gas Compressor Co., Ltd., Sichuan Southern Gas Compressor Co., Ltd. and other CNG compressor manufacturers in Sichuan and Chongqing have achieved positive results.

The CNG compressor developed by Shanghai Dalong Machinery Factory for filling stations of large-scale conventional natural gas vehicles, with four rows, symmetrical balance, piston force of 60kN and gas-water mixed cooling mode, has become one of the leading models of Shanghai CommScope Adalong High-pressure Equipment Co., Ltd., a Sino-British joint venture.

4. Special high-pressure compressor

As a special group of compressors, special high-pressure compressors have the technical characteristics of high parameters and high performance, such as: the exhaust pressure is as high as several, the ambient temperature is as low as ××××, the ambient relative humidity is ××××, the salt spray is ××××, the pitch is ××××, the overall size is less than ×××, the weight is less than ××, the dew point is lower than ×××, and the vibration intensity is lower than.

The power and overall size of the special high-pressure compressor are not very large, and it stands at one of the few peaks of compressor design/manufacturing technology with its high-tech content.

The overall level of domestic special high-pressure, high-parameter and high-performance compressor clusters is no less than that of foreign machines. Undoubtedly, they have contributed to China's manned space flight and other high-tech fields, and they are also excellent safeguard equipment for defending the country, the sea and the airspace. The leader of compressor manufacturing industry in China has been quietly struggling for this for half a century and achieved remarkable results!

5. Membrane compressor

After more than 40 years of development, the production capacity and technical level of diaphragm compressor manufacturing enterprises in China can not be underestimated by all powerful companies. At present, domestic diaphragm compressors can not only completely replace imported products, but also have considerable competitive strength in WTO rules.

Diaphragm compressors developed by Beijing Jingcheng Environmental Protection Industry Development Co., Ltd. have been successfully applied to nuclear power plants and national defense projects in batches.

The ultra-high pressure 200MPa diaphragm hydrogen compressor developed by China General Mechanical Engineering Company, a national mechanical equipment group, in cooperation with Shanghai Dalong Machinery Factory has high technical level and reliable operation.

Beijing Huizhi Electromechanical Equipment Co., Ltd. has successfully developed a new symmetrical balanced metal diaphragm compressor with completely independent intellectual property rights.

The Beijing Municipal Science and Technology Commission organized experts to pass the appraisal of the scientific and technological achievements of Huizhi Company's GD 134-30/ 160 Symmetrical Balanced Diaphragm Compressor, confirming its innovation, filling the gap of large diaphragm compressors in China, and determining that its technical performance index is leading in China and close to the international advanced level. This technology of Huizhi Company has obtained the patent certificate of utility model in China National Intellectual Property Administration.

Due to the extremely high air tightness and high working pressure of metal diaphragm compressor, it is suitable for gas compression and transportation in military and civil nuclear energy technology, nanotechnology, chemical defense, national defense, chemical industry, petrochemical industry, medical treatment, pharmacy, supercritical carbon dioxide extraction and other fields, especially for the compression of highly toxic, corrosive, radioactive, rare, extremely pure, extremely dry, flammable and explosive gases. This special function is the positive displacement or positive displacement of other structural types. The optimization of membrane cavity contour, the service life of membrane, the safety of multi-layer membrane when it breaks, the remote transmission technology between membrane head and pneumatic membrane head, and the technology of keeping the difference between membrane cavity pressure and hydraulic cylinder oil pressure. It has also promoted the soaring demand for diaphragm compressors in China in recent years.

Undoubtedly, domestic diaphragm compressor has excellent performance and low price advantage in the international market price ratio. In fact, its export performance is also very optimistic.

6. Positive displacement rotary compressor

The selection concept of domestic compressor owners has changed from attaching great importance to compressor operation power consumption to more objective and comprehensive consideration. Many factors, such as the daily labor cost of operators, the labor required for maintenance, the cost of accessories and consumables, and the direct and indirect economic losses caused by unexpected shutdown, prompted the owners to choose screw compressors. Typical mobile and fixed screw air compressors.

After the advanced industrial countries, the design and manufacturing technology of oil-injection screw air compressor in China is becoming more and more mature, while the dry (oil-free) screw air compressor is still at a disadvantage.

Screw compressor for process flow is especially suitable for compressing gases with low pressure, strong corrosiveness, high toxicity, liquid droplets and easy liquefaction, and its market share at home and abroad will still increase.

Domestic screw compressor for process flow is still the leader of Shanghai Compressor Co., Ltd., which not only produces and sells well, but also exports.

The technical progress of screw air compressor, in addition to the important aspect of profile (tooth shape), the improvement of oil, gas, cooling and automatic control system, the optimization of unit configuration, and the measures to reduce and isolate noise can not be underestimated. Nowadays, more and more enterprises in China have comprehensively improved the screw compressor.

Manufacturers of compressors, refrigerators, industrial pumps and reducers in China all have special milling machines and grinders for screw rotors, all of which are top international brands, and the total number is amazing. The author estimates that the total number of rotor-specific machine tools in the four industries of general machinery ranks first in the world (calculated by the country), which can be said to have great manufacturing potential.

China screw air compressor manufacturers on both sides of the Taiwan Strait have strong manufacturing capacity and prosperous production and sales, such as Wuxi Compressor Co., Ltd., Nanjing Compressor Co., Ltd., Jiangxi Gas Compressor Co., Ltd., Jiangsu Lichao Machinery Co., Ltd., Wuxi Wuyang Side Compressor Co., Ltd., Shenyang Air Compressor Factory, Yantai Bluestar Compressor Co., Ltd., Shanghai Bolete Compressor Co., Ltd., Ningbo Xinda Screw Compressor Co., Ltd. and Taiwan Province Fusheng Machinery Co., Ltd.

Different from foreign countries that basically use single-screw compressor to compress refrigeration medium, the unique single-screw compressor technology in China has created powerful production bases with oil-injected single-screw air compressors as the main body-Shanghai Jialishi Machinery Co., Ltd., Guangdong Lizheng Precision Machinery Co., Ltd., Fuxin Jinhao Air Compressor Co., Ltd., Shanghai He Fei Industrial Group Co., Ltd., etc. What is particularly commendable is that people with lofty ideals in these enterprises have worked hard and obtained a number of national patent certificates for single-screw compressors and related technologies, which have been transformed into productivity. Not only the measured technical and economic indicators of single-screw air compressor rank among the top in the world, but also the varieties and specifications can meet the needs of all parties, and at the same time, production and sales are booming, and exports earn foreign exchange.

7. Reciprocating piston power air compressor and miniature air compressor.

In China, the volume flow is 3m? Screw and reciprocating piston air compressors are the mainstream in the field of power air compressors (fixed and mobile) above /min.

The advanced nature and economy of air compressor depend on the comprehensive results of design and manufacturing costs (raw material costs, equipment depreciation costs, labor costs, etc.). ) and operating costs (power consumption, water consumption, labor costs, parts replacement costs, etc. ) The unit price of electricity in China is high, and the labor cost is low, which is quite different from that in foreign countries. Therefore, it is decided that:

A. It is advisable to advocate the development of screw air compressors and form an appropriate number of manufacturing enterprises with economic production scale, whose main service areas are user departments that require high comprehensive performance of air compressors.

B the reliability of reciprocating piston air compressor should be improved, and cheap and easy-to-use products should be provided to the society.

Obviously, the air compressor with a specific structure type can obtain good technical and economic benefits only within the optimal parameters.

It should be noted that the "optimal parameter range" is developing and changing, and even in the same historical period, the definition of its specific range will be different in the industry.

China reciprocating piston power air compressor has excellent technical foundation, strong manufacturing strength and a wide range of derivative products. Nanjing Compressor Co., Ltd., Liuzhou Liuerkong Machinery Co., Ltd., Liuzhou Yuhuan Compressor Co., Ltd., Chongqing Gas Compressor Factory Co., Ltd., Weifang Shengjian Compressor Factory, Beijing Jingcheng Environmental Protection Industry Development Co., Ltd., Jiangxi Gas Compressor Co., Ltd., Yuyao Jiehua Compressor Co., Ltd., Changchun Air Compressor Manufacturing Co., Ltd., Taiyuan Gas Compressor Factory, China Railway Construction Xuzhou Machinery General Factory, Jinan Compressor Co., Ltd., Hebei Wuqiao Air Compressor Co., Ltd., Xiangtan Compressor Co., Ltd.

The choice factor that can not be ignored is that the reciprocating piston power air compressor is not only cheap, but also energy-saving in operation.

Volume flow 3m? The reciprocating piston miniature air compressor with the speed below 100 rpm is widely used, and the absolute demand is great. However, under the modern production and marketing mode, its single machine price is limited, and only manufacturing enterprises with large production scale and certain technical content can establish themselves and export products.

Changchun Air Compressor Manufacturing Co., Ltd., Jiangsu Lichao Machinery Co., Ltd., Shanghai Dongfang Compressor Manufacturing Co., Ltd., Shenyang Dongling Air Compressor Co., Ltd., Anshan Oilless Air Compressor Co., Ltd., Beijing Jin Huan Compressor Co., Ltd., Tianjin Gas Compressor Factory, Tianjin Compressor Factory, Shijiazhuang Sanyuan Compressor Factory, Taiyuan Second Gas Compressor Factory, Nanjing Huaguan Compressor Co., Ltd., China People's Liberation Army No.4812 Factory, Maanshan Zheng Ling Compressor Co., Ltd., Yantai Lanxing Compressor Co., Ltd., Wuxi Liyuan Compressor Co., Ltd., Changde General Compressor Co., Ltd., Kaifeng Air Compressor Factory, Foshan Coral Compressor Co., Ltd., Liuzhou Jinxiang Machine Manufacturing Co., Ltd., Chongqing Small Compressor Factory and other enterprises have a long history of producing reciprocating piston miniature air compressors and considerable production capacity, which have well met the social needs.

A group of private reciprocating piston miniature air compressor manufacturers in Zhejiang and Fujian provinces, represented by Zhejiang Xin Lei Electromechanical Co., Ltd., Zhejiang Hongyou Compressor Manufacturing Co., Ltd. and Fujian Quanzhou Lida Machinery Co., Ltd., as rising stars, have multinational quality certification certificates, and have also achieved extremely large-scale production with low cost, high efficiency, good product appearance and stable quality. Most of their products are exported to Europe, America, Australia and New Zealand, with an annual export volume of several million.

8, mine air compressor

Safety in production is the eternal theme of mining industry, especially coal industry.

The mine disaster is heartbreaking and heartbreaking. The reason is undoubtedly the violation of laws and regulations and neglect of management. However, we can't ignore the safety of the equipment itself in the coal industry.

As an important mining equipment in coal industry, air compressor provides essential compressed air power for direct mining machinery and tools. So, what is the safety of compressed air and air compressor operation?

As we all know, about one third of the air as a gas mixture at room temperature is oxygen. The chemical activity of oxygen goes without saying. The oxygen in the air, the lubricating oil in the compressor cylinder and the possibly too high exhaust temperature are isomorphic, which has become a safety hazard in the operation of the air compressor. As for the high velocity of compressed air and the electrostatic charge of particle rust in airflow, it is the inducement of compressed air pipeline explosion.

The early reciprocating piston air compressor for mine was lubricated with oil and was single-stage compression. Later, it evolved into two-stage compression, and the exhaust temperature at each stage was obviously reduced, which was beneficial to safe operation and energy saving, but it was still a cylinder oiler. In other words, the compressed air provided by the air compressor still contains oil mist. Condensed lubricating oil and water in gas storage tanks and compressed air pipelines are potentially huge safety hazards. If these oils and water are not discharged in time, it will not only increase the velocity of compressed air in the pipeline, but also increase the electrostatic effect of inevitable solid particles in the airflow, and may also cause ice blockage, which will lead to serious consequences.

In order to overcome the threat of oil and water in compressed air to the safe operation of air compressor, as early as the early 1950 s, the relevant safety regulations of the former Soviet Union clearly stipulated the installation of air compressor aftercooler. In the following 20 -30 years, the relevant technical specifications in China only went through the process from "aftercooler should be set" to "aftercooler should be set". Obviously, the arrangement of aftercooler not only reduces the pipeline corrosion and the generation of solid particles, but also widens the distance between the exhaust temperature of air compressor and the flash point of lubricating oil, greatly weakening the adverse effects of oil mist and moisture on safety production.

In order to fundamentally ensure the safety of reciprocating piston air compressors used in mines, far-sighted enterprises in the compressor industry resolutely and vigorously promote oil-free lubrication of cylinders, and put underground air compressors and ground compressed air station air compressors into the same new series. There is no doubt that this is a treatment. At the same time of cutting off the source of oil mist, the exhaust temperature of air compressor at all levels has been completely decoupled from the flash point of lubricating oil, that is, no matter how high the exhaust temperature is, it is impossible to cause the explosion of compressed air pipeline. More importantly, the exhaust temperature can be completely controlled. Of course, only by adopting the crosshead structure can the inherent energy-saving superiority and cheapness of the reciprocating piston air compressor for mining be established.

Rotary air compressor can provide compressed air with low temperature and low oil content, which meets the requirements of safety standards. Moreover, because of the internal cooling by oil injection during compression, the compressed exhaust gas is separated from oil and filtered, and it is also an ideal model of mine air compressor.

The vast majority of mine air compressors in use are reciprocating pistons with oil (or splash) lubrication in the cylinder. In order to operate safely, the operator must strictly abide by the relevant provisions of the instruction manual. On this basis, it is really necessary to vigorously carry out safety technical transformation-adding and transforming a few parts with less economic investment to realize oil-free lubrication of cylinders.

The development and utilization of China's rich coalbed methane resources have also been initially carried out, and the application of this new energy also needs the support of compressors. It shows that the compressor industry can also make great achievements in the comprehensive utilization of coal resources and energy saving!

When the mine ground compressed air station supplies gas to the underground, there are inevitably some defects, such as too long compressed air pipeline, large resistance loss, many air leakage points, large pipeline consumption and high actual exhaust pressure requirements when the air compressor is running. Therefore, the use of air compressor with appropriate volume flow in underground roadway has obvious energy-saving and material-saving effects. Of course, the underground air with a certain gas content is determined by the objective reality, and it is duty-bound to ensure the safe operation of the mine air compressor!

In the early 1960s, Mr. Chen Keming developed a volume flow of 10 meter in the then Shenyang Gas Compressor Factory. /min underground symmetrical balanced mine air compressor. In the early 1980s, the then Jiangxi Gas Compressor Factory successfully changed the volumetric flow to 20m? /min L underground air compressor runs in several coal mines. At present, many compressor manufacturers provide various types of reciprocating piston and rotary air compressors underground, which has produced great social/economic benefits.

9, compressor industry "Eleventh Five-Year Plan" focus.

A. the realistic demand and urgency of developing 1000kN- 1250kN reciprocating piston compressor with super piston force;

B) Popularize the advantages of reciprocating piston compressor in the field of medium and high pressure, avoid the short distance of low pressure and large flow, control the repeated production of low-end products, and develop compressors for high-pressure natural gas reinjection, drilling booster compressors, high-speed split compressors and new oil-free lubricating compressors;

C. Give full play to the technical and economic advantages of constant-capacity screw and single-screw rotary compressor;

D the improvement of technical connotation of domestic screw compressor process and the importance of users' realistic choice;

E. objective demand for developing small and medium-sized compact centrifugal air compressors;

F. The advanced models of domestic CNG compressors used in natural gas automobile filling stations have been proved to be as good as imported products, and have gone abroad, with excellent cost performance and competitive potential, and need to be well connected with international standards;

G further improve the research and development of labyrinth compressors, and provoke technological posts that compressors with other structures are not competent for;

H the importance of expanding the coverage of performance parameters of diaphragm compressors with strong market demand;

Development and production of ultra-small compressors with high performance, high parameters, low noise and low vibration required by national defense;

J. Small reciprocating piston air compressors need to adjust their positioning to improve the actual economic benefits while continuing to export in large quantities;

K. The extreme importance of independent research and development, completely independent intellectual property rights and making good use of computer network technology;

Gas purification devices, such as long air, and key components of compressors need to be deeply researched and developed.

People with lofty ideals in the compressor manufacturing industry in China are determined to continue to work hard to create a brand-new situation in which compressor manufacturing technology/economy and trade are flourishing, and to serve the inside and outside of the Great Wall and the north and south of the country with suitable products with excellent cost performance, so as to leap into the global economic circle and thus stand among the world's compressor powers!

Let's join hands!