[keynote]upon operation of cfb boilers in china[mr.jianhua mi]

Upon Operation of

CFB Boilers in China

by J. H. Mi

May 18, 2009

中国循环流化床锅炉的运行分析

2

Contents

General Overview

CFB Boilers Actuality

135 MW CFB Units

300 MW CFB Units

Issues and Problems

Future Action

3

General Overview

By the end of 2008

Total installed power capacity: 792.53 GW

Electricity production: 3433.40 TWh.

They are all in the second place of the world.

Power capacity is twice as much as of year 2003.

The new-added capacity in last 3 years was

293.58 GW, approximately equal to total capacity

of Japan or the sum of France, Germany and UK.

4

General Overview

5

General Overview

6

General Overview

Electricity generation of 2008

coal: 79.60%

hydro:

16.41%

nuclear:1.99% wind: 0.37%

oil & gas: 1.35%

7

General Overview

Total coal-fired unit capacity: 577 GW

Electricity generation from coal-fired units :

2760.90 TWh

They are all in top 1 of the world.

Coal consumption is about 1.61 Gt, 58.76%

of total domestic consumption.

8

General Overview

9

General Overview

Strategic Policies

Energy conservation priority;

Optimize thermal power generation;

Promote the development of hydro-electric

power;

Make great efforts to build nuclear sets;

Make use of renewable energy with great

speed.

10

General Overview

Coal-Fired Power Policies:

Build large-capacity, high parameter units with

small one closedown in advance. SC & USC units

are major choices;

CHP - electricity and heat;

Large CFB boilers for difficulty fuel;

Air-cooling units for north and northwest regions;

IGCC & CCS

11


Coal washing brought 200 Mt coal gangue

annually;

Government policy promotion;

Main manufacturers support;

135MW, 200MW and 300MW units are

suitable for utility power plants.

12


135MW units in operation : more than 150sets（400~490t/h）

300MW units in operation: 15 sets

300MW units under construction: 64 sets

Total capacity: 67 GW，11.61% of coal-fired power capacity with 3000 sets.

China has the greatest amount of large CFB boilers.

13


A nationwide CFB cooperation network was set up in 2002, with 346 group members (2008) in fields of reasearch, manufacture, design, construction, commission and operation.

Operation Analysis

Surveying the whole cases.

Benefit to benchmark management.

Operating adjustment.

Reconstruction and design reform.

Helpful to improve the reliability, efficiency and cleaner production level.

14

135MW CFB Units

（brief）

Reliability

Economic Factors

Emission Factors

135MW CFB Units - Reliability

Unplanned Outage TimesMean Unplanned

Outage Times

16


Max Continuously Available Days

17

135MW CFB Units – Economic Factors

Mean Carbon Contents of

Fly Ash and Slag Flue Gas Temperature

18

135MW CFB Units - Economic Factors

Load Change

Station Service Power Consumption Rate

Net coal consumption rate

19

135MW CFB Units - Economic Factors

Oil Consumption for Ignition

20

135MW CFB Units - Emission Factors

Running Rate of

Desulfurizing DeviceMean Desulfurizing Efficency

21


Emission Level Utilization of Ash and Slag

22

300MW CFB Units

Basic

Compared with PC Boiler

Load

Reliability

Coal Contents

Economic Criteria

Emission Factors

23

300MW CFB Units - BasicName No. MW Coal Manufacturer Date

Sichuan Baima CFB Demonstration

Power Station Co., Ltd.1 300 Anthracite Alstom 2006

Qinhuangdao Power Co,.Ltd. 5, 6 300 Bituminous Dongfang 2006

Yunnan Datang International

Honghe Power Generation

Co.,Ltd.

1, 2 300 Lignite Harbin 2006

Yunnan GD Kaiyuan Power Co.,Ltd. 7, 8 300 Lignite Shanghai 2006

Yunnan Huadian Xunjiansi

Power Co., Ltd. 6 300 Lignite Harbin 2006

Mengxi Power Plant 1, 2 300 Gangue Shanghai 2007

Guangdong Heshuyuan Power Plant 3, 4 300 Anthracite Dongfang 2008

Jiangxi Fenyi Power Plant 3 330 Lean Harbin 2009

Anhui Linhuanzhongli Power Plant 1 300 Mix Harbin 2009

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300MW CFB Units - Basic

Original Technology：Alstom

Baima 1

Qinhuangdao 2

Honghe 2

GD Kaiyuan 2

Xunjiansi 2

Mengxi 2

25


Yunnan Honghe Power Plant

26


Heshuyuan 2

Designed and

manufactured by

Dongfang

27


Guangdong Heshuyuan Power Plant

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300MW CFB BoilerCompared with PC Boiler (2007)

Item Unit CFB PC

Statistic Boiler Amount sets 8 443

Mean Load Rate % 77.51 78.23

Unplanned Outage Times p.a. times 5.63 0.89

Electricity Consumption for Self % 9.44 5.67

Standard Coal Consumption per kWh g/kWh 353.86 338.79

Carbon Contents of Fly Ash % 2.34 2.6

Running Rate of Desulfurizing Facility % 100 ﹥50

Mean Desulfurizing Efficency % 93.46 93.56

SO2 Emission mg/Nm3 299.43 185.58-1000

NOx Emission mg/Nm3 93.29 500~1200

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300MW CFB Units - Load

NameUnit

No.

Power

generation

of 2007

MWh

Max.

load

MW

Mean

load

MW

Load

rate

%

Sichuan Baima CFB

Demonstration Power

Station Co., Ltd.

1 1601972.5 320 234.9 78.3

Qinhuangdao Power Co,.Ltd.1 1814377.7 306 248.6 82.8

2 1265622.3 306 248.6 82.8

Yunnan Datang International

Honghe Power Generation

Co.,Ltd.

1 2028864 319 267.0 89.0

2 1892082 323 265.0 88.3

GD Kaiyuan Power Co.,Ltd.7 948174 310 219.2 73.0

8 1421622 313 222.5 74.2

Yunnan Huadian Xunjiansi

Power Co., Ltd. 6 1249898.7 325 155.0 51.7

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NameUnit

No.

Availability

hour UOT

Max. continuously

running time (Days)

Load range of

oil aid-burning

[MW]

Sichuan Baima CFB

Demonstration Power

Station Co., Ltd.

1 7668 7 155 ——

Qinhuangdao Power

Co,.Ltd.

1 7560.3 7 175 ≤80

2 5273.7 2 —— ≤80

Yunnan Datang

International Honghe

Power Generation

Co.,Ltd.

1 7833.1 1 293 ≤105

2 8150.2 1 198 ≤105

GD Kaiyuan Power

Co.,Ltd.

7 4490.7 6 —— ≤105

8 6806.2 9 —— ≤105

Yunnan Huadian

Xunjiansi Power Co., Ltd. 6 6242 12 —— ——

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300MW CFB Units- Coal Contents

NameVdaf

%

Aar

%

Mt,ar

%

Sar

%

Qnet,ar

kJ/kg

Sichuan Baima CFB Demonstration

Power Station Co., Ltd.18.11 44.15 6.39 2.57 15235

Qinhuangdao Power Co,.Ltd. 26 27.5 2.1 0.9 19776

Yunnan Datang International Honghe

Power Generation Co.,Ltd.40.79 10.23 38.5 1.06 12900

GD Kaiyuan Power Co.,Ltd. 26.03 18.23 33.02 1.74 12224

Yunnan Huadian Xunjiansi Power Co.,

Ltd. —— —— —— —— 11147

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300MW CFB Units- Economic Factors

NameUnit

No.

Carbon

contents

of fly

ash

%

Carbon

contents

of slog

%

Net coal

consumption

rate

g/kWh

Station

service

power

consumption

rate %

Oil for

boiler

firing

t/unit.

year

Flue

gas

temp.oC

Sichuan Baima CFB

Demonstration Power

Station Co., Ltd.

1 3.99 2.43 352.79 9.18 152 126.2

Qinhuangdao Power

Co,.Ltd.

1 4.2 0 368 9.57 860 133

2 4.2 0 368 9.57 860 133

Yunnan Datang


Power Generation

Co.,Ltd.

1 1 0.2 340.84 8.59 111.6 150

2 1 0.3 340.84 8.52 127.9 149

GD Kaiyuan Power

Co.,Ltd.

7 1 0.45 347.35 9.69 218 146.9

8 1 0.72 348.08 9.62 526.5 136.2

Yunnan Huadian

Xunjiansi Power Co.,

Ltd.

6 —— —— 363.72 10.75 92.5 ——

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NameUnit

No.

Mean

desulfurization

efficiency %

Running rate of

desulfurization

equipment %

SO2

emission

mg/Nm3

NOx

emission

mg/Nm3

Ca/S

Sichuan Baima CFB

Demonstration Power

Station Co., Ltd.

1 94.7 100 487 87 1.7

Qinhuangdao Power

Co,.Ltd.

1 90 100 200 70 2.1

2 90 100 200 70 2.1

Yunnan Datang


Power Generation

Co.,Ltd.

1 95 100 327 65 1.7

2 95 100 327 65 1.7

GD Kaiyuan Power

Co.,Ltd.

7 97.5 100 280 147 1.9

8 94 100 275 149 1.9

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Issues and Problems

Surface erosion

Leakage/ BTF (Boiler Tube Failure)

Combustion trouble: bed-matter unsteady,

slagging, blasting combustion, overheat, etc.

Other failure：coal block, ash leakage, slag

disposal difficulty, etc.

Different opinions of desulfurizing effect.

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Issues and Problems

36

Issues and Problems

37

Issues and Problems

38

Future Action

During the year of 2006-2011, the installation capacity of CFB boilers burning coal waste is 20,000MW ，which are supported by the government. Most of the boilers are of 300MW class.

Based on the design and operational experience of 300MW unit, a 600MWe supercritical CFB boiler will be built and put into commissioning at the end of 2011.

[keynote]upon operation of cfb boilers in china[mr.jianhua mi]

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