turbine

Turbine is the transliteration of the English word turbine, derived from the Latin word turbo, meaning a rotating object. 　　A turbine is a machine that converts the energy contained in a fluid into mechanical work. Not only compressors, but also steam turbines, turbines, gas turbines, and expanders can be referred to as turbines. 　　A centrifugal compressor is a blade-type rotary compressor (i.e., a turbine compressor). In a centrifugal compressor, the high-speed rotating impeller exerts a centrifugal force on the gas, and the diffuser section applies a diffusing effect to the gas, thereby increasing the gas pressure. As advancements in gas dynamics have led to improved efficiency in centrifugal compressors, and thanks to the development of key technologies such as high-pressure sealing, the manufacturing of small-diameter impellers for low-flow applications, and multi-oil- wedge bearings, a range of issues related to the operation of centrifugal compressors at higher pressures and wider flow rates have been resolved. This has greatly expanded the scope of application for centrifugal compressors, allowing them to replace reciprocating compressors in many situations and thus **significantly broadening their range of uses. The pressure of industrial high-pressure centrifugal compressors ranges from (150~350)×105 Pa, while those used for gas injection in offshore oil fields can reach pressures as high as 700×105 Pa. The flow rate of centrifugal blowers used for blast furnace ventilation is around 7000 m3/min, the power of some of them reaches 52900 KW, and their rotation speed is generally above 10000 r/min. 　　A turbine is a power machine that uses the superheated steam generated by a power station boiler to drive the turbine blades, causing them to rotate; this in turn drives the turbine and the turbogenerator to generate electricity. It is a prime mover in power generation equipment. 　　A turbine is an engine that generates power by using the flow of fluid to drive the impeller; it is classified into steam turbines, gas turbines, and hydroturbs based on the type of fluid used. It is widely used as a power engine in power generation, aviation, navigation, and other fields. 　　A flue gas turbine is also known as a flue gas expander. It is an energy recovery device for the regenerated flue gas in a catalytic cracking unit. High-temperature flue gas under certain pressure is expanded within a flue gas turbine to generate power, which is used to drive the main fan or generator. There are single-stage and double-stage types; the thermal efficiency of single-stage machines ranges from 0.76 to 0.78, while that of double-stage machines can reach 0.80 to 0.82.

A turbine is a type of centrifugal compressor that falls under the category of internal compressors; it is quite advanced. After being tested in production over the past decade or so in China, it is now widely used by various companies. Compared to traditional reciprocating compressors, it performs the same function of circulating and pressurizing gas, but it has the following advantages: (1) The motor and compressor are sealed within a high-pressure cylinder, thus preventing any external leakage of high pressure. Motors, compressors, etc., only experience the force generated by the inlet pressure difference. ⑵The unit operates smoothly, without noise, and without high-pressure dynamic seals, resulting in low maintenance costs. ⑶The gas is compressed by multi-stage impellers, resulting in a continuous flow without pulses, which facilitates the stabilization of the temperature in the synthesis furnace. ⑷It has a large single-stage production capacity and a simple structure; it can be installed outdoors or near the synthesis tower, reducing the need for high-pressure pipelines and lowering investment costs. ⑸Gases are less susceptible to oil contamination, extending the catalyst’s lifespan. ⑹Thrust bearings are only used during startup, shutdown, or abnormal operating conditions; under normal operation, a floating balance disk is used to balance all axial forces between the motor and the compressor.

A turbine compressor is a type of high-speed rotating machine that can meet various industrial requirements for gas compression. It has a wide range of applications and is irreplaceable by other types of compressors in many fields. As an industrial equipment, it is widely used in many important sectors such as petroleum, chemicals, gas pipelines, smelting, refrigeration, and mine ventilation ； As a fundamental component of gas turbine engines, they can be found in various fields such as aviation, water and land transportation, and power generation ； As a turbocharger, it has become an essential component of modern internal combustion engines. In process units such as large-scale fertilizer and ethylene plants, it requires substantial investment and consumes a significant amount of energy; its performance directly affects the economic efficiency of the unit. Safe operation is closely linked to the reliability of the entire plant, which is why it constitutes a critical component that receives much attention. With the rapid advancement of science and technology, and thanks to new achievements in fields such as thermodynamics, gas dynamics, mechanical dynamics, computing, and modern control, as well as the application of various new technologies, research on turbine compressors is making continuous progress. With the adoption of modern manufacturing technologies, the thermal performance and reliability of turbine-based industrial compressors have improved rapidly. Although there are still some issues that need to be resolved and many further research topics remain, they have already reached a fairly advanced level. To master and continuously improve such machinery, a large number of engineering and technical personnel who understand modern science and technology, as well as the structure, principles, design, and research methods of turbine compressors, are needed for tasks related to design, development, operation, and management. A centrifugal compressor, also known as a turbine compressor, operates on the same principle as a centrifugal blower. The reason why centrifugal compressors can achieve higher outlet pressures is, in addition to having a large number of stages (usually more than 10) and a large impeller diameter, mainly due to their use of high rotational speeds (generally above 5000 rpm). To achieve a higher outlet pressure, the speed of the impeller must be higher. Due to the high compression ratio, the gas volume is greatly reduced and the temperature rises significantly; therefore, compressors are divided into several sections, with each section containing multiple stages. The diameter of the impeller decreases across these sections, and its width also decreases slightly from stage to stage. Intermediate coolers are installed between the sections as well.

Friends: A turbine is not a compressor; they are two completely different types of mechanical devices that should not be confused with each other. “Turbine” is a transliteration from English; in China it is called a steam turbine. Thermal power plants use steam turbines to drive the generator sets. In addition to steam turbines, there are also gas turbines, hydroturbines, etc., all of which are prime movers that generate power. In a turbine (steam turbine) compressor, one end is the turbine and the other end is the compressor, with a coupling connecting the two. The compressors used in fertilizer factories have very high power ratings, ranging from tens of thousands to even hundreds of thousands of kilowatts. It is difficult to drive such compressors using electric motors, but it is easy to do so with steam turbines.