Purpose and Application
This group includes compressors purposed to remove oxygen-converter gases from various BOS converter capacities after wet cleaning of the gases.
Typical Components of the Machine:
- centrifugal сompressor with a rotor, foundation frames, tie-rods and base plates;
- lube oil system;
- monitoring and protection instruments, instrument transducers;
- heat monitoring, control, protection and signaling board;
- compressor mounting and dismounting tools;
- accessories for lifting and alignment of the rotor and the top section of the compressor body;
- electrical motor;
- operating documents.
Package-supplies of all machine components manufactured by CJSC “REPH” result in:
lower cost of the basic equipment due to the fact that such equipment is manufactured directly by CJSC “REPH” subsidiaries;
- application of the up-to-date technical solutions;
- lower operating cost;
- reliable operation of all components;
- earlier equipment delivery dates.
The machine consists of a compressor, having a welded body and a single double-suction impeller, the lube oil system, the bearings, an electrical motor drive.
The group of equipment used for the basic oxygen steelmaking includes the following machine series:10000-11-1, 8500-11-1, 7600-13-1, 7500-13-1, 4500-11-1. A number of the machines (10000-11-1, 8500- 11-1, 4500-11-1) is equipped with a starting frequency converter. The machine is equipped with protective and control devices which ensure its stable operation. The lube oil system of the machine provides forced lubrication of the bearings of the compressor, and the electric motor.
Control of the machine start and stop, and the machine performance monitoring is done from the remote control panel located in the operator’s room.
The machine control panel is equipped with emergency and warning audible signals and lights and process status indicators.
The compressors include the compressor itself, the electrical motor drive, the reduction gear, the lube oil system, monitoring, protection, and signaling system and the heat monitoring boards.
The compressor is a single-cylinder single-stage machine with the double-suction impellers. The welded compressor body consists of two suction cavities and a volute. The suction branch pipes are directed upward, the discharge branch pipes, sideward. Due to nitrogen gas supplied to the compressor’s end seals, the latter prevent ingress of air into the blading section, and leakage of compressed gas into the mechanical equipment room. A speed-increasing gear is installed between the compressor and the electric motor.
The centrifugal compressor 10000-11-1 is purposed to remove the oxygen-converter gases from the converter with capacity of 400 tonnes which applies combined blowing process (with top-blown oxygen and bottom blown inert gas) after wet gas cleaning without reburning of the carbon oxide, and has the adjustable output.
The compressor is designed for the area class В-1А having the explosive gas category and group PA-T1 (ПА-Т1).
The compressor is driven by the electric motor SDZ-900S-4 (СДЗ-900S-4) with the frequency converter PChVS-5/10 12UHL4 (ПЧВС-5/10-12УХЛ4).
The centrifugal compressor 7600-13-1 is purposed to remove the oxygen-converter gases from the converter with capacity of 300-350 tones, and then to transfer such gases to the gas holder, after which, they will be further used as fuel. The compressor is designed for the area class В-1А having the explosive gas category and group PA-T1 (ПА-Т1).
The compressor is equipped with a vaneless diffuser specifically designed to enlarge the working space of the compressor. The compressor is driven by the electric motor SDZ-900S-4 (СДЗ-900S-4) with the frequency converter PCvVS5/10- 12UHL4 (ПЧВС-5/10-12УХЛ4).
The centrifugal compressor 7500-13-1 is purposed to remove the oxygen-converter gases from the steel-making converter, which is blown with oxygen from top, and gases of which are removed without reburning of the carbon.
The compressor is driven by the electric motor .