General- and Special-Purpose Air Centrifugal Compressors

Centrifugal compressors for the oxygen separation units.

Compressor K3000-61-1

Design Features

Compressor K3000-61-1 is a double-cylinder, three-circuit, six-stage direct-drive machine with two intermediate coolers. The compressor is driven by the steam turbine with power output of 22 MW, which allow for the centrifugal compressor to change its operating mode due to a change of the rotor speed.

Compressor K1290-121-1

Purpose

The compressor is designed to compress atmospheric air at the low-concentrated nitric acid production line.

Design Features

The compressor is a double-cylinder twelve-stage (each cylinder has 6 impellers), four-circuit machine. After every circuit the air is cooled in the intermediate air cooler located outside the housing. The compressor is driven by a steam turbine K15-41-1 with power output of 15 MW, which allow to change the rotor speed within the range of 2500-3400 min.-¹. Rotor of the low pressure cylinder is driven directly by the steam turbine, and the rotor of the highpressure cylinder, via the speed increasing gear.

Compressor K1700-61-1

Purpose

The compressor is designed to compress atmospheric air, and to supply it to the oxygen units.

Design Features

The compressor is a six-stage, three-circuit machine. Each circuit consists of two compression stages. Air is cooled by the intermediate coolers located after the first and the second circuits. Air coolers are located in the basement room. To cool the compressor outlet air, a loop air cooler is provided. The compressor is driven by a synchronous motor STD-10000-2UHL4 (СТД-10000-2УХЛ4) with a power output of 10 MW.

Compressor K905-62-1

Purpose

The compressor is designed to compress atmospheric air, and to supply it to the oxygen units.

Design Features

The compressor consists of a singlecylinder compressor itself, electric motor drive, and control, monitoring, protection and signaling system. The compressor is a six-stage, three-circuit machine. Between the circuits there are air coolers installed. Each circuit consists of two compression stages. The speed increasing gear is a singlestage herringbone (double helical) gear. The compressor is driven by a synchronous motor STD-6300-2UHL4 (СТД-6300-2УХЛ4) with a power output of 6300 kW, voltage 6 or 10, kV and speed 50 s-¹.

Compressor K384-61-1

Purpose

The compressor is designed to compress atmospheric air, and to supply it to the user. The compressor may be used for compression of nitrogen and other non-aggressive mediums.

Design Features

The compressor consists of a single-cylinder compressor itself with an intermediate air cooler, a speed increasing gear, an electric motor drive, the lube oil system of the anti-surge protection and control devices, protection, monitoring and signaling system and control panels.

The compressor is a single-cylinder, six-stage, having three double-stage circuits. Gas is cooled after every compressor circuit.

The end labyrinth seals allow to use the compressor for nitrogen and other non-explosive and nonaggressive gases as the gas supplied to the end seals prevents the compressor leakage. The speed increasing gear is a single-stage herringbone gear with nitrated teeth.

The compressor is driven by a synchronous motor STD-3150-2UHL4 (СТД-3150-2УХЛ4) with a power output of 3150 kW, speed 3000 min-¹, and voltage 5 or 10, kV.

Compressor K590-41-1

Purpose

The compressor is designed to compress air, and to supply it to the user.

Design Features

The compressor is a four-stage,double-circuit, single-suction unit with an intermediate cooler.

The compressor is so designed that its bearings can be checked without closing of the horizontal joint of the compressor housing.

The compressor is driven by an electric motor having a closedcircuit ventilation system.

The compressor is equipped with protection devices which prevent surging, backflow of air from the compressor to the supply line), axial rotor shift, overpressure (when the compressor is charging the air pressure exceeding the maximum value), excessively low pressure of lube oil, overheating of the bearing liner.

Compressor K390-112-1

Purpose

The compressor is designed to compress nitrogen supplied from the air separation units, as well as to compress atmospheric air and to supply it to the separation units.

Design Features

The compressor consists of a double-cylinder compressor itself with an intermediate air cooler, two speed increasing gears, an electric motor drive, the lube oil system, the anti-surging system, protection, monitoring and signaling system and control panels.

The compressor is a doublecylinder,11-stage machine. The low-pressure cylinder contains three double-stage circuits, as the low-pressure cylinder of the compressor K420-91-1, and the high-pressure cylinder includes one five-stage circuit. Air (nitrogen) is cooled by the intermediate gas coolers after the first, the second, and the third circuits. The gas cooler of the third circuit has a built-in moisture separator.

The speed increasing gears are installed between the electric motor and the low-pressure cylinder, and between the low-pressure cylinder and the high-pressure cylinder.

The compressor is driven by a synchronous motor.

Compressors K420-91-1

Purpose

The compressor is designed to compress air and to supply it to the user in various industry branches. Also, they can be used for compression and supply of air for injection of coal slurry into the boiler burners, and for compression of nitrogen and of other non-aggressive and non-explosive gases.

Design Features

The compressor consists of a double-cylinder compressor itself with an intermediate air cooler, a speed increasing gear, an electric motor drive, the lube oil system, the surging protection and control system, protection, monitoring and signaling system and control panels, end air cooler. The compressor is a double-cylinder, nine-stage machine. The low-pressure cylinder contains three double-stage circuits, and the high-pressure cylinder includes one three-stage circuit. Air is cooled by the intermediate air coolers after the first, the second, and the third circuits. The first air cooler located under the low-pressure cylinder contains tube bundles which are used for cooling of air after the first and the second circuits. The air cooler of the third circuit, located at the level of the mechanical equipment room floor, has a built-in moisture separator. The compressor has no leakages due to gas supplied to the end seals..

The speed increasing gear is installed between the electric motor and the low-pressure cylinder.

The compressor K420-91-1 is driven by an asynchronous motor.

Compressors 1000-31-1,1000-32-1

Purpose

The compressors are designed to compress air, and explosive gases with fluid dynamics parameters similar to those of air.

Design Features

The compressor consists of a compressor itself, an electric motor drive, a speed increasing gear, the lube oil system, and the control, monitoring, protection and signaling system.

The compressors are the singlecylinder, three-stage machines.The compressor housing is an iron casting. Suction and discharge branch.

The compressors are equipped with the speed increasing gears. The compressors are driven by a synchronous motor.

The compressor 1400-31-1

The parameters of this machine were obtained due to replacement the following parts of the standard delivery set of the compressor 1000-32-1:

electric motor;
compressor rotor;
pair of speed increasing gears;
liners of the compressor and the speed increasing gear;
set of seals.

The parameters were also obtained due to upgrading of the diffusers of all three stages and of the suction cavity bore in situ according to the Supplier’s drawings.

Gas dynamic testing of the upgraded compressor in situs proved that it has the required parameters.

Compressor K3000-63-1

Purpose

It is designed to compress atmospheric air, and to supply it to the oxygen separation units.

Design Features

The compressor consists of a compressor itself, an electric motor drive, the lube oil system, a speed increasing gear, and the control, monitoring, protection and signaling system, and heat monitoring system.

The compressor is a single-cylinder, six-stage machine having three double-stage circuits. After the first two circuits, air is cooled by two intermediate shell-andtube coolers with finned tubes. After the third circuit, air is cooled by the three parallely connected end air coolers.

The first and the second compressor stages are equipped with the inlet guide vanes extending a stable operation period of the compressor, and, meanwhile, retaining its efficiency.

The compressor is driven by a synchronous motor TDS-20000-2UHL4 (ТДС-20000-2УХЛ4) with output power capacity of 20 000 kW.

Compressor C525-61-1

Purpose

It is designed to compress and supply industrial air.

Design Features

The compressor is a single-cylinder, six-stage machine having three circuits. The compressor housing has the integrally cast iron bearing sleeves. The compressor housing has horizontal and vertical joints. The suction and the discharge branch pipes are directed downward. After the first and the second circuits there are intermediate coolers located outside the housing. The compressor is equipped with the automated monitoring and control system, and the instruments. The automated monitoring and control system controls the following:

pre-starting;
start-up;
operation;
normal stopping;
emergency shutdown.

The compressors are protected from the backflow of gas from the main line to the compressor by means of a back pressure valve located on the discharge pipeline.

A speed increasing gear is installed between the compressor and the electric motor. The compressors are driven by a synchronous motor.

Technical characteristics

Compressor Specifications