Wind pressure exceeding 200 kPa
Some basic chemical raw materials, such as propylene, ethylene, butadiene, benzene, etc., can be processed into important chemical products including plastics, fibers and rubber. In petrochemical plants that produce such basic raw materials, centrifugal compressors also play an important role as one of the key pieces of equipment. In addition, centrifugal compressors are also critical equipment in other industries such as petroleum refining and refrigeration.
China was capable of manufacturing centrifugal compressors as early as the 1950s. Starting from the early 1970s, a series of high-performance medium and high-pressure centrifugal compressors were introduced mainly for petrochemical plants and large-scale fertilizer plants, and rich operational experience was gained. On the basis of digesting and absorbing the imported technology, China has greatly enhanced its independent research, design and manufacturing capabilities.
Performance Characteristics
Advantages
The wide application of centrifugal compressors is mainly due to their following advantages over reciprocating compressors:
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Large gas flow rate, simple and compact structure, light weight, small unit size and small footprint.
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Stable operation, reliable operation, high operating rate, few friction parts, resulting in low demand for spare parts, low maintenance costs and less manpower required.
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In chemical processes, centrifugal compressors can achieve a completely oil-free compression process for chemical media.
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As a rotary machine, centrifugal compressors are suitable for direct drive by industrial steam turbines or gas turbines. For general large-scale chemical plants, by-product steam is often used to drive industrial steam turbines as power, making comprehensive utilization of thermal energy possible.
However, centrifugal compressors also have some disadvantages.
Disadvantages
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Centrifugal compressors are not suitable for applications with extremely small gas flow rates or excessively high pressure ratios.
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The stable operating range of centrifugal compressors is relatively narrow; although gas flow adjustment is convenient, its economic efficiency is poor.
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The efficiency of centrifugal compressors is generally lower than that of reciprocating compressors.
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