Multi-stage centrifugal compression system and optimization method thereof

Abstract

The invention discloses a multi-stage centrifugal compression system and an optimization method thereof. According to the invention, inlet air of the multi-stage centrifugal compression system is cooled and / or subjected to pressurizing treatment at the same time, at least one stage of intermediate cooling device in the multi-stage centrifugal compression system is removed, and two stages of centrifugal compressors without the intermediate cooling device are directly connected through a connecting pipe, so that the pressure ratio loss of the multi-stage centrifugal compressor system is reduced. The pressurizing treatment is realized through a fan, the air inlet pressure of the centrifugal compression system is increased, at least the air inlet pressure of the centrifugal compression system is guaranteed to be not lower than the ambient atmospheric pressure, the air inlet pressure of the centrifugal compression system is increased through pressurizing, and therefore the centrifugal compression system can operate normally when a cooling treatment system fails. Meanwhile, the reduction of the pressure ratio loss and the increase of the air inlet pressure can reduce the working pressure ratio of the centrifugal compressors and greatly reduce the energy consumption of the system under the condition of keeping the output pressure of the centrifugal compression system unchanged.

Description

technical field [0001] The present invention relates to a method for optimizing a multistage centrifugal compression system, in particular to a method for optimizing a centrifugal compression system by utilizing intake air treatment and a related multistage centrifugal compression system. Background technique [0002] Centrifugal compression systems are widely used in important fields of the national economy, including electronic semiconductor industry, steel, chemical industry, and air separation gas manufacturing industries. They are important industrial equipment and are also large energy consumers. Centrifugal compression systems are generally large-scale compression systems with large gas production. Due to the small unipolar pressure ratio of centrifugal compression, generally less than 3, multi-stage compression is often used in centrifugal compression systems. The typical process of existing air compression is: one-stage centrifugal The compressor sucks in the ambien...

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Problems solved by technology

[0003] The above process mainly has the following problems. Air is directly sucked in from the environment. When the ambient air temperature is high, the energy consumption of the first-stage compression is high, and the gas production volume becomes smaller; the gas production volume and operating conditions of the system fluctuate with the ambient temperature.

The second is that the pressure loss of the interstage cooler is relatively large, making the actual pressure ratio of the system greater than the required pressure ratio, resulting in increased energy consumption of the system, and may also increase the number of compression stages; at the same time, the interstage cooler makes the system complex and the system reliability Reduced maintenance workload

The third is that the adsorption dryer needs to use electric energy to drive regeneration, which consumes a large amount of electric energy needlessly. At the same time, a large amount of heat generated by the compressor is discharged to the atmosphere by the cooling tower of the cooler.

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