BOILER FEED PUMP ERECTION AND COMMISSIONING PART-II ABC OF THERMAL POWER PLANT

        Typical  data of BHEL make Boiler Feed Pump and its motor is given below briefly.

A.  Booster  Feed Pump

a. Direction of rotation                                         Anticlockwise  (viewed on NDE)

b. Suction temperature ; C                                                           161.8 deg c

c. Suction pressure                                                                          8.43 ata

d.Discharge Pressure                                                                     25.65 ata

e.Flow rate, m³/hr                                                                          1143.7 

f. Efficiency  %                                                                                   81

g.Speed rev/m                                                                                  1494

h.Power absorbed, KW                                                                  662

i.  Driver/Pump flexible coupling                                            Euroflex, India

B. Boiler Feed Pump

a.  Suction Flow                                                                                894960 kg/hr

b. Suction pressure                                                                         26.85  ata

c.  Discharge Pressure                                                                    209.19 ata

d.  Speed rpm                                                                                    5465

e. Power consumption KW                                                          6233

f. Efficiency                                                                                        81%

g.  Normal recirculation flow                                                       250  m³/hr.    

C. Hydraulic  Coupling

a.  Manufacturer                                                                               VOITH

c.  Rotation seen in direction of power flow                         CCW

              

d.  Motor Speed rpm                                                                      1494

f.  Primary Speed ‘rpm’                                                                 5089

g.  Full load slip                                                                                 2.24%

i. Max. output speed ‘rpm’                                                          5820 

k. Oil tank filling                                                                             2500 litres.

Auxiliary  oil Pump

     Power                                                                                         30 KW

     Rated speed                                                                            2945 rpm

     Voltage                                                                                     415 V

     Frequency                                                                                 50 Hz

     Protection                                                                                  IP 55

The details above are for 500 MW units . It is prudent to verify with OEM ( original equipment Manufacturer specification during working .

Activities related to Boiler feed pump erection and commissioning (MD)

Preparation of foundation for  PUMP ,MOTOR and HYDRAULIC  COUPLING ( i.e checking of center line with respect to known co-ordinates , checking of  pocket dimensions , Level of the foundations etc .Also check the foundation of coolers .Also record the data in protocol for further decision

Placement of motor and hydraulic coupling on the foundation .

Grouting of motors & HC with ready mix grout ( conbextra GP 2 , SIKKA etc)

Motor winding RTDs( Resistence Temperature detector), Instrumentation checking completion  

Motor cooling waters lines completion

Alignment of motor & hydraulic. Coupling

Hydraulic coupling instrumentation completion

Mounting of scoop tube actuator

Checking and clearance setting of motor bearings.

continued to PART _III