Issue 9, 2013 - A major breakthrough in the field of large-scale air separation units in China

China's large-scale air separation unit has achieved a major breakthrough

A few days ago, the first set of domestic 60,000 Nm3/h air separation unit supporting centrifugal multi-axis supercharger independently developed by Xi'an Shaanxi Drum Power Co.
, Ltd.
was successfully
tested in Shaanxi Drum Power.
The unit will be supporting
the annual output of 400,000 tons of acetic acid project of Henan Longyu Coal Chemical Co.
, Ltd.
This is another major breakthrough
in the field of large-scale air separation units after the successful commissioning of the 60,000-level air separation unit supporting the internally cooled isothermal centrifugal compressor in October last year.

The 60,000 Nm3/h grade air separation set centrifugal compressor unit is the largest domestic air separation unit designed and manufactured by Shaanxi Drum with independent intellectual property rights
.
The successful commissioning of the unit marks that Shaanxi Drum Power has occupied the commanding height in the field of 60,000-grade air separation core compressors in China, reached the advanced level of the international air separation device of the same level, and broke the situation
that China's 60,000-grade air separation unit supporting large compressor units rely on imports.

Air separation unit compressor packages include air compressors and boosters
.
On October 16, 2012, Shaanxi Drum Power successfully tested the 60,000-grade EIZ140 air compressor provided by Henan Longyu Coal Chemical Company
.
As a supporting unit, the EG56 multi-shaft booster pressurizes part of the compressed gas from the compressor from 0.
6 MPa to 7 MPa
.
The 60,000-level multi-axis supercharger adopts a number of advanced technologies, of which the pneumatic part adopts international advanced design software, and the impeller speed at all levels matches well with the impeller structural parameters to ensure that all levels of the unit are in the high-efficiency zone; Multi-shaft compressor has a total of 5 shafts, the impeller adopts high-efficiency model stage, all stages are axially inhaled, and can be adjusted according to the needs of imported guide vanes (IGV), the compressor load can be changed by 75%~105% and other pressures, and the compressor working conditions range is wide; The compressor shaft end seal adopts carbon ring seal, which has small sealing leakage, short rotor cantilever span, excellent rotor dynamic performance and stable operation; Compared with the single-shaft booster, the compressor adopts a step-by-step cooling scheme of process gas, which has high isothermal efficiency, reduced power consumption, and reduced power by about 1400kW, saving at least 5.
6 million yuan
in annual operating costs.

The main performance parameters and technical indicators of Shaanxi Drum Power 20,000~60,000 Nm3/h grade large air separation core compressor unit have reached the international advanced level, and they are currently manufacturing 80,000 and 100,000 grade air separation core compressor prototypes, and the research and development of 120,000 grade air separation core compressor units has been completed
.
(Wang Jun)