Boiler Coal Feeding Commissioning Procedure

Compiled by:

Reviewed by:

Approved by:

2014

Qingdao Huachen Weiye Electric Power Technology Engineering Co., Ltd.

Catalogue

31. overview

32. main equipment technique specification

73.commissioning basis and standard

84.commissioning purpose

85.commissioning condition

86.commissioning process and method

117.commissioning instrument and equipment

118. commissioning quality and assessment standard

129.Environment, occupational health and safety control procedure

1210 organization and division

1511.Appendix

Boiler Coal Feeding Commissioning Procedure1.Overview

ZMTP 2150MW2510t/hThe project is Zambia ZMTP 2150MW coal fired power plant, located at Maamba coal mine, Sinazongwe, Southern Province. The boiler is produced by Dongfang Boiler Company, which is 2*510t/h high temperature, super high pressure circulating CFB boiler. Here the procedure is for the boiler IDF and system commissioning.2.

Main equipment technique specification

2.1

Boiler specification

Zambia MCL 2150MW Coal Fired Power Plant2510t/h150MW

Zambia MCL 2150MW Coal Fired Power Plant is provided with two sets of 510t/h super high pressure, natural circulating CFB steam drum boilers, which is single furnace, single medium reheating, thermal isolation cyclone separator, tube-type air preheater, balanced draft, end part double flue, suspension structure, half-unsheltered layout, solid state deslagging, complete steel structure, matched with 150MW condense turbine-generator. The boiler adopts CFB combustion and limestone desulfurization technique that low pollution and high efficiency.

Boiler main parameter sheet

Item

Unit BMCRBECR

Main steam flowT/H510485.73

Main steam pressure MPa14.3214.32

Main steam temp. 540540

LP RH inlet pressure MPa2.852.85

LP RH inlet temp.334334

HP RH inlet pressureMPa2.72.7

HP RH inlet temp.540540

RH flowT/H420.42400.4

Feed water temp. 248248

Feed water temp. exclusive all HP171

#1

Feed water temp. exclusive #1 HP228.6

#2

Feed water temp. exclusive #2 HP207.3

(LHV)

Boiler guaranteed efficiency (LHV)90

Boiler desulfurization efficiency 92.3

Coal quality DescriptionRange of Coal AnalysisCoal Analysis

PerformanceWorst

ProximateAnalysis(ADB)

Ash%45.3 to 53.2748.353.27

Volatile Matter (ADB)%19.6 to 18.0518.818.08

Fixed Carbon (ADB)%33.7 to 27.4731.5527.44

Inherent Moisture (ADB)%1.4 to 1.211.351.21

Total Moisture%1.9 to 2.11.92.1

Normal Heating ValueKcal/kg4059 to 299035003110

UltimateAnalysis(as received basis)

Carbon (C)%42.8 to 37.0637.533.26

Hydrogen (H2 )%n2.81 to 2.332.452.33

Nitrogen (N2)%0.93 to 0.720.850.72

Oxygen (O2)%6.45 to 6.086.206.34

Sulphur (S)%1.0 to 2.01.7*1.7*

Moisture (H2O)%1.43 to 1.241.902.1

Ash%45.3 to 53.2549.453.55

Gross calorific value (as received basis)Kcal/kg4039 to 319135803191

Hard grove indexHGI595959

Ash Analysis

Silica (SiO2)%61.7 to 61.1361.0861.13

Alumina (A12O3 )%31.0. to 30.8930.5230.89

Iron Oxide (Fe2O3)%4.8 to 3.634.103.63

Titanio (TiO2)%3.00 to 3.443.13.44

Phosphoric Anhydride(P2O5)%0.50 to 0.370.430.37

2.2

Boiler coal consumption

1.7%

Single boiler coal consumption sheet (sulfur content: 1.7%)

No.

Item

Unit

PG coal

Worst coal

1

Operation condition -SGMCRVWOTMCRSGMCR VWOTMCR

2

Coal consumption/hour t/h109.7104.198.9124.4118.1112.2

3%

Single boiler coal consumption sheet (sulfur content: 3%)

No.

Item

Unit

PG coal

Worst coal

1

Working condition -SGMCRVWOTMCRSGMCR VWOTMCR

2

Coal consumption/hourt/h110104.499.2124.7118.4112.5

2.3

Coal feeding system regulation and equipment technique parameter

2.3.1

Coal feeding system regulation

2.3.1.1 242484400 t/h450t/h; 4300400The high amplitude oscillating screen of the project is installed in coal crusher house and screen building, the first stage oscillating screens (coarse screening) is total 4 sets, in which two sets are installed on left side, and another two sets on right side. The second stage oscillating screens (sifting screening) is total 4 sets, in which two sets are installed on left side, and another two sets on right side. Total 8 sets of high amplitude oscillating screens are provided with the project, in which 4 sets of coarse screen rated output is 400t/h, and maximum output is 450t/h, and 4 sets of sifting screen rated output is 300t/h, and maximum output is 400t/h. 2.3.1.2 156500mmQ=250t/h350t/h350mmQ=250t/h350t/h150mmQ=200t/h250t/h110mmQ=200t/h250t/h440mmQ=100t/h150t/h

Total 15 sets of oscillating coal feeders are installed, in which 6 sets are installed at underground coal hopper to convey raw coal, with raw coal grain size not 500mm, rated output of 250t/h and maximum output of 350t/h; in which 3 sets are installed at emergency underground coal hopper of coal yard to convey crushed coal with grain size 50mm, rated output of 250t/h and maximum output of 350t/h; in which one set is installed at underground coal hopper of coal cleaning plant with grain size 10mm, rated output of 200t/h and maximum output of 250t/h; in which 4 sets are installed at underground coal hopper of limestone system to convey limestone with grain size 40mm, rated output of 100t/h and maximum output of 150t/h2.3.1.3 4350t/h450t/h50mm