13 December 2010

«REP Holding» renovates the blast-furnace air at the «Novolipetsk Steel»

In the end of November 2010 Y in frame contract of project for full-blown modernization of Novolipetsk metallurgical complex, «REP Holding» has put into operation the turbo compressor unit consisting of centrifugal compressor К5500-41-1М и driven steam turbine type of К22-90-2М, which were made at the enterprises of «REP Holding».

At Novolipetsk metallurgical complex works more than 60 units with a brand name of «Nevsky Zavod», the first supply were started as far back as 50-th relic of the past.

Knowing the traditional quality of «NZL» and new features of integrated supply of products in composed of «REP Holding», in purpose of modernization of the metallurgical complex were chosen these turbo-units - efficient, reliable and suitable for overall dimensions requirements.

In April of 2008 a contract was signed for the delivery of three turbo-compressor units (TCU) for OJSC «Novolipetsk Steel» as part of the renovation project of steam-and-air station for the 3 rd, 4-th and 5-th - blast furnaces of company. This project became the foremost packaged supply of «REP Holding»: developing of technical assignment, production of three TCU type of К5500-41-1М at a driven steam turbine type of К22-90-2М, ACS and Filter House-were realized by Holding on the basement of internal cooperation of affiliated companies of JSC «Electropult plant», CJSC «Nevsky Zavod», CJSC «Electropult -Engineering» and the rest daughter enterprises and JV companies.

TCU are intend for compression and supply of enriched oxygen air into blast furnaces, compressor capacity – 5200 m3/minute, steam, turbine capacity 23 MW. After operating the 72 h, the turbine has successfully passed the testing at the metallurgical complex, gained the required data, thereby acknowledge conforming of engineering specification customer technical requirements. The unit was commissioned and is now transferred to work at the blast furnace.

The advantage of modern upgraded units K5500 is the high performance (up to 5200 m3/ min) and ease of use that have been achieved as a result of changes in the flow part and the other nodes.

One of the key benefits of data sets – it’s full automation. Previously used hydraulic adjustment is replaced by electro, control units by microprocessor control system management, providing high accuracy of the main adjustable parameters (speed and performance of the compressor).

TCU production of «REP Holding» will replace the existing fleet of units with a mark «NHL» old generation, developed its resources and outdated.

As part of the planned reconstruction of the plant and in accordance with the terms of the contract before the beginning of 2012 «REP Holding» will deliver on the «Novolipetsk Steel» two more similar modern units.

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