ID FD PA

7/30/2019 ID FD PA

http://slidepdf.com/reader/full/id-fd-pa 1/17

Station: NTPC- Simhadri BHEL Ref No.PS-DC-186-500-0033

NTPC Ref no SIM/1/TS/1/33Sheet 1 of 15

Plant area: BOILER

PROCEDURE FOR COMMISSIONING OF FANS (ID FAN, FD FAN AND PA FAN)

SLNO

1.0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

9.0

10.0

LIST OF CONTENTS

PLANT DETAILS

OBJECTIVE

PROPOSAL

SERVICES REQUIRED

SAFETY PERECAUTIONS

EMERGENCY PROCEDURE

STATE OF THE PLANT

METHOD

COMPLETION CRITERIA

APPENDICES

a) LOG SHEET

b) CHECKING AND COMMISSIONING OF VFD.

7/30/2019 ID FD PA




Plant area: BOILER


SL.NO

1.0

1.1

1.2

PLANT DETAILS:

The plant details of the Draft System is as follows.

Induced Draft Fan

No of Fan : 2

Type : NDZV 47

Make : BHEL

Flow : 558.2 cu.m/Sec

Pressure : 485 mmwc

Temperature : 1530C

Drive : Motor

Speed : 580 RPM

Motor Rating : 3650

Control : Inlet Damper plus variableFrequency Drive. (VFD).

Forced Draft Fan

No. of Fan : 2

Type : Axial AP 1-26/16 Axial

Reaction, single stage withsilencer.

STATUS

Signatures

NTPC BHEL

7/30/2019 ID FD PA




Plant area: BOILER


SL.NO

1.3

Make : BHEL

Flow : 246 cu.m/Sec

Pressure : 351 mmwc

Temperature : 500C

Drive : Motor

Speed : 980 RPM

Motor Rating : 1175 KW

Control : Variable Blade Pitch control.

The boiler is also equipped with primary air fan, which form apart of the coal preparation and firing system.

Primary Air Fan

No. of Fan : 2

Type : Axial AP 2-20/12Axial Reaction, Doublestage with silencer

Make : BHEL

Flow : 170.5 cu.m/Sec

Pressure : 1183 mmwc

STATUS

Signatures

NTPC BHEL

7/30/2019 ID FD PA




Plant area: BOILER


SL.NO

1.4

1.5

1.6

1.7

Temperature : 500C

Drive : Motor

Speed : 1480 RPM

Motor Rating : 2450 KW.

Control : Variable Blade Pitchcontrol.

All the fan are mounted on concrete deck with suction anddischarge duct. Connected to the Fan flanges. FD Fans and PAfans are provided with Silencer at the suction duct. Regulation of Fan from no load to full load is performed by changing the pitchangle of blade profile on all blades simultaneously duringoperation. This is achieved through a sophisticated servomechanism (Hydraulic Servo Motor0 externally actuated by apower cylinder or Servomotor and forced lub-oil system.

In the case of ID Fan, the equipment is driven by variable

frequency drive motor coupled with soft coupling. The regulationof the fan is effected through the inlet dampers located at the inletof the fan and variable speed by VFD.

In FD and PA fans, the rotor is supported in antifriction bearingsand cooled by forced lubricating oil. A thrust bearing is providedto absorb axial loads. Thermometers are provided in the bearinghousing for temperature monitoring.

In ID Fan, the bearings are while metal sleeve type with forced oillubrication. Fixed bearing near drive end is designed to absorb

the Axial forces. Thermometers are provided in the bearinghousing for temperature monitoring.

STATUS

Signatures

NTPC BHEL

7/30/2019 ID FD PA




Plant area: BOILER


SL.NO

1.8

1.9

1.10

2.0

3.0

3.1

3.2

3.3

4.0

4.1

4.2

Respective O & M manuals to be referred for typical drawing of each fan.

List of plant Item readiness (Mechanical, Electrical and C&I) areto be prepared at site before commissioning of the fans.

Safety Rules clearance certificate to be signed at site beforecommissioning of the fans.

OBJECTIVE:

To commission the fans (ID Fan, FD Fan and PA fan) and make itavailable for commissioning and operation of the Unit.

PROPOSAL

It is proposed to commission the fans as per the followingproposals.

Oil flushing of lub-oil system (Refer to Testing schedule BHELRef.No PS-DC-186-500-0013A/SIM/1/TS/1/003A)

Trial run of H.T. Motor for 8 Hrs.

Trial run of Fan for 8 Hrs.

SERVICES REQUIRED

Availability of O & M Manual for fans

Availability of auxiliary cooling water

STATUS

Signatures

NTPC BHEL

7/30/2019 ID FD PA




Plant area: BOILER


SL.NO

4.3

4.4

4.5

4.6

5.0

5.1

5.2

5.3

5.4

5.5

5.6

Availability of L.T/H.T. Power supply

Availability of lighting, communication facility at the test area.

Availability of portable fire extinguishers

Availability of working crew with Technician for attending minor problem during commissioning of Fans.

SAFETY PRECAUTIONS:

Availability of first aid kit at test area.

The team commissioning the fan should be aware of theprocedure adopted.

Agencies working in the boiler area / associated ducting systemare informed about the test / cleared from the test area (As per the actual requirement).

All loose materials around the fan area are cleared.

Required approach stair cases, platforms and hand rails areerected prior to testing.

Oil collecting trays and sand buckets are made available at testarea.

STATUS

Signatures

NTPC BHEL

7/30/2019 ID FD PA




Plant area: BOILER


SL.NO

6.0

6.1

6.2

6.3

EMERGENCY PRECAUTIONS:

The group conducting the test should be aware of action to betaken on the event of injury to personnel.

The group shall be aware of operating instruction of portable fireextinguishers.

The test team should be aware of the steps to be taken to trip therunning equipment in case any emergency / abnormal

observations are notified to them.

STATUS

Signatures

NTPC BHEL

7/30/2019 ID FD PA




Plant area: BOILER


SL.NO

7.0

7.1

7.2

7.3

7.4

7.5

7.6

STATE OF THE PLANT

Erection of the following are completed.

Lub oil system

All the lub oil control oil pipe lines

C.W lines

Fan and its H.T.Motor

Suction and discharge duct and their connection with fan.

L.T./H.T switch gears required for the fan.

Fan casing, Suction / Discharge ducts are cleared off men &temporary materials.

All permanent supports and guides of fan & duct are erected.

All local instrumentation of lub-oil system, motor and fan areerected. (Required list to be prepared at site) )Pressure andtemperature indicators are duly calibrated)

Remote indication at control room are made available (List to beprepared at site)

Recommended lubrication oil is filled up in the lubrication system.

STATUS

Signatures

NTPC BHEL

7/30/2019 ID FD PA




Plant area: BOILER


SL.NO

7.7

7.8

7.9

7.10

7.11

Blade pitch operation (for FD & PA fan) and inlet damper operation for ID fan) verified at local and the same ensured fromremote for correct opening / closing with respect to positionindicator at local and remote. Free movement of Blades & inletdampers are ensured.

ACW lines are flushed and connected to the respective inletpoints.

ACW inlet / outlet connections to ID fan sleeve bearings areconnected as per the indicated markings.

Ensure variable frequency Drive (VFD) system is made ready (Incase of ID Fan for operation of the Fan. (Refer to the procedureenclosed in Section 10.0.)

Insulation resistance of the motor measured and ensured that thevalues are at satisfactory level.

STATUS

Signatures

NTPC BHEL

7/30/2019 ID FD PA




Plant area: BOILER


SL.NO

8.0

8.1

8.2

8.3

8.4

8.5

8.6

8.7

METHOD

Start lub-oil system and establish oil circulation at recommendedoil pressures (Both lub-oil and control oil, which ever isapplicable)

After obtaining clearance from all agencies, start the motor indecoupled condition and check the direction of rotation. If direction found reverse, change the direction of rotation of the

motor.

Refer to section 10.0 for details regarding checking andcommissioning of VFD system. In addition commissioning manualof VFD issued by supplier to be followed in the commissioning of VFD system.

Start the motor once again and put under 8 Hrs trial run (FD andPA motors). In the case of VFD synchronous Machine, put themachine under 4 Hrs trial through channel I and under 4 Hrs trialthrough channel II.

Performance of the motor to be monitored by logging loadcurrent, vibration and temperatures of bearings and windings,whichever applicable.

After satisfactory completion of drive trial run, drive and the fanare coupled.

Start the fan and put under 8 Hrs trial run.

STATUS

Signatures

NTPC BHEL

7/30/2019 ID FD PA




Plant area: BOILER


SL.NO

8.8

8.9

8.10

Blade pitch for FD and PA fan to be at minimum before startingthe fan and after starting, fan to be slowly loaded up to around10-15% (Exact loading of the fan to be decided at site)

For ID Fan, keeping the inlet damper at minimum, Fan startedand loading to be gradually increased to 10-15% (Exact loadingof the fan to be decided at site)

During 8 Hrs trial run, Fan performance observed by logging load

current, vibration, temperatures of the bearings, parameters of lub-oil system VFD system and draft values in PA,SA and Gascircuits covered in single fan running condition.

STATUS

Signatures

NTPC BHEL

7/30/2019 ID FD PA




Plant area: BOILER


SL.NO

9.0

10.0

COMPLETION CRITERIA

Commissioning of Fan (ID Fan, FD fan and PA Fan) completedwith satisfactory completion of

a) Oil flushing of Lub-Oil system

b) Trial run of motors for 8 Hrs

c) Trial run of Fan for 8 Hrs.

(8 Hrs trial each for motor and Fan of FD and PA system and 8Hrs trial for motor and Fan of ID system with channels I ans IIeach inservice for 4 Hrs duration)

APPENDICES:

a) Log Sheets.

b) Checking and Commissioning of VFD

STATUS

Signatures

NTPC BHEL

7/30/2019 ID FD PA


PROCEDURE FOR COMMISSIONING OF FANS

(ID FAN, FD FAN AND PA FAN)

7/30/2019 ID FD PA


SHEET 13 OF 1510.0 LOG SHEET

DATE :

Project :Unit :Activity :

SLNo

TIME

LUB-OIL SYSTEM BEARING TEMPERATUREDraft

(Suction/Discharge)

RemarksDischargePressure

Filter DP

Lub-OilPressure

Controloil

pressure

OilTempafter

cooler

TankOil

Level

Motor Fan

DE NDE DE NDE

Signatures

NTPC BHEL

7/30/2019 ID FD PA


7/30/2019 ID FD PA


7/30/2019 ID FD PA


Documents

ID FD PA