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1.3.1.2 Centrifugal compressor for natural gas

ELECTRICAL CENTRIFUGAL GAS COMPRESSOR
ECG – 7 – 250

USAGE AREAS

· compression of natural gas within natural gas extraction units;
· compression of crude-oil installation gas within crude-oil production units;
· gas pressure rising set for high and low pressure ducts within TRANSGAZ DISTRIGAZ


WORKING PARAMETERS

· compressed gas: natural gas (relative density around 0,61);
· aspiration pressure denominated / maximum: 1,5 bars / 1,8 bars;
· heading pressure: 7,5 bars;
· aspiration temperature: 15 0C;
· heading temperature: 40 – 50 0C (with cooling);
· headed flow denominated / maximum : 275.000 Nm3/day / 375.000 Nm3/day;
· carrying away : electric motor asynchronous with the rotor in by-pass 1200 kW, 6kV, 50 Hz, MIB Exd II BT4, 1500 rot/min;
· specific electrical energy consumption: maximum 72 kW/1000 Nm3;
· external sizes (Lxlxh): 5500x2500x2350 mm;
· total weight : 27.000 daN.


PRODUCT COMPONENT

· centrifugal compressors set and multiplication device;
· electric drive motor;
· coupling between the electric motor-multiplication device;
· bed set ;
· command system, adjustment, control (with micro chip);
· tightening and oiling system /dam;
· anti-explosive installation.


LAYOUT

· covered space, bridge-crane at least 10 tf, lowest temperature 5 0 C ;
· foundation: size about 5500x2200x2000 mm insulated.

UTILITIES


· high voltage power line 6 kV , with automated starting transformer;
· low voltage power line 380 V – consumption minimum/maximum 1,5/16,5 kW;
· water cooling circuit:
o cooling tower with an Dt minimum : 8 0 C;
o cooling water flow : 90 m3/h;
o maximum of water temperature entering in cooler : 30 0 C;
o cooling water pressure : 3,5 bar.
· air for driving anti-pumping valve :
o class II conform STAS 8842;
o working pressure 4 ÷ 6 bars .
· gas for driving air motor, auxiliary pump for oiling the valve :
o clean, dry gas;
o pressure 6 ÷ 8 bars.

FUNCTIONING RESOURCES

· between over-hauling: 32.000 hours;
· total resource: 4 over-hauling.

WARRANTIES

· 8000 functioning hours, but no more than 18 months from delivery ;
· spare parts, available to buy, at least 15 years from delivery ;
· post warranty service available on contract

REFFERRAL

- the ECG-7-250 set has been validated in in April 1999, in the S.P.Ţicleni unit– of PETROM Group, totaling 12,000 functioning hours, with an usage percentage of 92%.

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