Flue Gas Cleaning of Coal-fired Power Plant and SEC Technologysteag.in/sites/all/themes/steag/Seminar_2017/Flue_Gas_Cleaning_of... · Flue Gas Cleaning of Coal-fired Power Plant and

Shanghai Electric Power Generation Environment Protection Engineering Co., Ltd.

Flue Gas Cleaning of Coal-fired Power Plant and SEC Technology

Content

Introduction of SEC-PGEPE

• Environment Protection Island

• Introduction of DeNOx/FGD/Particle Control Technology

• DeNOx

• FGD

• Particle Control

2

3

2000 2005 2013

Foundation of Company

Company Name Changed

Company Share Changed

..Desulfurization.. ..Environment.. SEC-PGEPE

SO2

NOx

PM

0

200

400

600

800

1000

1200

1996 2003 2011 Ultra LowEmission

India newemission norms

from Ist Jan 2017

1200

400

10035 100

1000

450

10050 100

600

50

2010

30

Chinese Increasingly Stringent Environmental Requirements Vs India new emission norms from year Ist Jan 2017

SO2 NOx PM

PM

NOx

SO2

Background

4

Milestones of Typical Reference

1989 2000 2005 2006 2012 2015

Transferred FGD Tech

Transferred SCR Tech

Developed WESP Tech

Transferred Low-low Temp ESP Tech

Dust collector Da Gang Power Station,

Tian Jin

De-SOx Equipment（GGH）

ShanghaiWaigaoqiao 300MW

De-NOx Equipment (SCR、SNCR)

Songyu 350MW SCR (First Domestic SCR)

Advanced Low-NOxCombustion System

Low-low Temp ESP/NL-GGH

Environment Protection Island

Our technologies are authorized for global markets! 5

300

200

150150

130

16

160

117

22.5

5035

10

0

50

100

150

200

250

300

350

World Wide Emission Standard mg/Nm3

India Euro USA Average China

NOx SO2 PM

600

For India Unit≥500MW, SO2<200mg/Nm³; Unit<500MW, SO2 <600mg/Nm³

Background:

6

7

Main Business

Engineering

Procurement

Construction

￭ Project Proposal

￭ Project Detail Design

￭ Project Basic Design

￭ Equipment Design

￭ Equipment Procurement

￭ Manufacture Supervision

￭ Manufacture Supervision

Service

￭ Project Management

￭ Construction Supervision

￭ System Commissioning

￭ Training and After Service

8

26660

102644

14180

53

190

24

0

20

40

60

80

100

120

140

160

180

200

0

20000

40000

60000

80000

100000

120000

FGD De-NOx Low-low Temp ESP

Un

its

Meg

a W

att

Accomplished Capacity and Units

Unit Capacity Unit Number

Statistics by the end of Jan. 2016

Content

• Introduction of SEC-PGEPE


• Introduction of DeNOx/FGD/Particle Control Technology

• DeNOx

• FGD


9

Environment Protection Island(EPI)

10

More

Environment

More

Efficiency

More

Economic

More Energy

Saving

EPI Project Example

NOx（mg/Nm3）

<20

~2000 <20 <20SOx（mg/Nm3）

Dust（mg/Nm3）

~20,000 ~15 <2

<20

ESP

IDF Absorber

WESP

Stack

Gas Heater

Air preheater

Gas Cooler

<300

Temp（℃）

~370 >80~120 ~90 50 >80

<2

11

Non Leak GGH

Boiler

De-NOx

Waigaoqiao 2 Power Plant

~1950


Limestone

Sea water

Magnesium

LNB

SNCR

SCR

ESP

Low-low Temp ESP

Wet ESP

12

Dry

Content



Introduction of DeNOx/FGD/Particle Control Technology

DeNOx

• FGD


13

MENU

LNB①

SNCR②

SCR③

DeNOx FGD Particle Control

LNB SNCR SCR

MENU

14

DeNOx Technology

LNB SCR SNCREfficiency 50%-60% 50%-90% 30%-50%

Initial Cost Low High Medium

Operation Cost Low Medium Medium

Catalyst No Yes No

Recommend Boiler PC boiler Both CFB boiler and PC boiler

CFB Boiler

Emission: <600mg/Nm3 Recommend Tech: LNBEmission: <300mg/Nm3 and CFB Recommend Tech: SNCREmission: <300mg/Nm3 and PCB Recommend Tech: LNB+SCR

DeNOx FGD

LNB SNCR SCR

MENU

15

Particle Control

20112011

2012

Bench Scale Researsh

(30KW drop tube furnace)

Pilot Scale Research

(3MW Pilot Test Facility)

Numerical Analysis

Practical Application

(Full scale furnace)

2008

Development of Composite Air Staged Low NOx Combustion System (CASLNCS-200TM)

Composite Air Staged Low NOx Combustion System (CASLNCSTM) is developed on bench and pilot scale research, numerical analysis and practical application by Shanghai Boiler Works Ltd. (SBWL).


LNB SNCR SCR

MENU

CASLNCSTM has excellent performance on full load low NOx, high combustion efficiency, anti-slagging, anti-corrosion, and can reduce gas side energy imbalance at furnace outlet.

CASLNCS-200TM has obtained a number of invention patents and trademarks authorized.

CASLNCS-200TM has been applied to more than 200 new construction and retrofit boilers.

CASLNCS-200TM has reached the leading level in the world, which was authenticated by National Electricity Technology Market Association in 2012.

Mainburner

Low AGP burner

Summary of Composite Air Staged Low NOx Combustion System (CASLNCS-200TM)

High AGP burner

UnitName

Coal typeNOx

(mg/m3,O2=6%)

Tai shanHigh volatile bituminous

<150

Jian biLignite and bituminous

<200

An qingMedium volatile

bituminous<300

Xin mi Lean coal <600

Jiao zuo anthracite <650

Part Low NOx Retrofit Achievement


LNB SNCR SCR

MENU

Reaction principles：

2(NH2)2CO+4NO+O2→4N2+2CO2+4H2O

2(NH2)2CO+2NO+O2→3N2+2CO2+4H2O

Reaction temperature：850 ℃～1200 ℃

Reduction agent：Urea，ammonia aqueous

Catalyst：No catalyst

Efficiency: 50%-70% in CFB boiler

30%-50% in PC boiler

SNCR


LNB SNCR SCR

MENU

18

boiler

PumpDilution waterMetering module

Static mixer

Injection groups

Distribution module

Gasified airCompressed Air

Cooling air

Metering equipment

Dilution water module

The reagent storage tankFeed pump

Feed module


LNB SNCR SCR

Process

MENU

19

SNCR ProjectsType of Boiler CFB Boiler

Gas flow 1261453Nm3/h

Temp 850~895℃

Inlet NOx 200mg/Nm3

Outlet NOx 100mg/Nm3

Efficiency Required: 50%Actual: 70%

NSR 1.4


LNB SNCR SCR

20

MENU

Shuozhou Power Plant 2ⅹ350MW SNCRTime of Commission: Nov, 2015.

Type of Boiler PC Boiler

Gas flow 1869261Nm3/h

Temp 950~1150℃

Inlet NOx 860mg/Nm3

Outlet NOx 600mg/Nm3

Efficiency Required: 30%Actual: 50%

NSR 1.45

SNCR Projects


LNB SNCR SCR

MENU

21

Hanfeng Power Plant 2ⅹ600MW SNCRTime of Commission: March, 2016

Principle of SCR

• 4NO + 4NH3 + O2 → 4N2 + 6H2O

• NO + NO2 + 2NH3 → 2N2 + 3 H2O

Catalyst

Reagent:

To stack

N2& H2ONH3

Flue gas

(NOx)

Recommend Temp: 320℃-420℃

SCR


LNB SNCR SCR

MENU

22

23

Evaporator

Dilution Fan

Mixer

Surge Tank

Pyrolysis

Electrical Heater

Hot Air

Urea Solution

Tank

Bucket Elevator

Urea Solution Storage

Tank

Inlet Duct

Outlet Duct

Reactor

Inlet Duct

Outlet Duct

Reactor

Anhydrous Ammonia Tank

Reagent Storage System

Reagent Storage System

Reactor System

Reactor System

SCR Reduction Agent

Ammonia,liq

Urea,pyrolysis

Urea,hydrolysis

Ammonia,aqua

Response Very fast Very fast Medium Fast

Cost Medium High High Medium

Running Pressure

High Atm Medium Atm

Ammonia Concentration

100% <5% after dilution

~37% after hydrolysis, <5% after dilution

~25-28%

Safety Low High Medium Medium

Access Easy Easy Easy Hard

Domestic Share ~40% ~35% ~15% ~5%

DeNOx FGD

LNB SNCR SCR

MENU

24

Particle Control

25

Songyu Power Plant 2X300MW

Time of Commission: 2006

Retrofitting project, First Domestic SCR

Boiler Type PC Boiler

Gas Flow 977077Nm3/h

Temp℃ 380

NOx Inlet 450-707mg/Nm3

NOx Outlet -

DeNOx Efficiency 60%

SO2 to SO3 <1

Ammonia slip 3ppm

Ash Concentration 26g/Nm3

MENUDeNOx FGD

LNB SNCR SCR

Particle Control

26



Temp℃ 378

NOx Inlet 450mg/Nm3

NOx Outlet 90mg/Nm3


SO2 to SO3 <1

Ammonia slip 3ppm

Ash Concentration 41g/Nm3

DeNOx FGD

LNB SNCR SCR

MENUParticle Control

Puqi Power Plant 2X1000MWNew Project, High Ash

Time of Commission: Oct, 2012

27



Temp℃ 377

NOx Inlet 400mg/Nm3

NOx Outlet 80mg/Nm3


NH3/NOx 0.82

SO2 to SO3 <1

Ammonia slip 3ppm

Ash Concentration 57.9(79)g/Nm3

DeNOx FGD

LNB SNCR SCR


Yaomeng Power Plant 2X600MWRetrofitting Project, High Ash

Time of Commission: Jan, 2013



Temp℃ 376

NOx Inlet 450mg/Nm3

NOx Outlet 80mg/Nm3

DeNOx Efficiency Required 82.2%Actual 92.5%

SO2 to SO3 <1

Ammonia slip 3ppm

Air Preheater retrofitted

IDF retrofitted

Boiler steel structure Checked

28

DeNOx FGD

LNB SNCR SCR


Waigaoqiao 2 Power Plant 2X900MWRetrofitting Project

Time of Commission: 2013

Content




• DeNOx

FGD


29

MENU

Process of FGD-Limestone

SO2+CaCO3+1/2 O2+2H2O

CaSO4·2H2O+CO2

Boiler

Stack

IDFBUF GGH Absorber

Gypsum dehydration

• GGH

• Absorber

• BUF

• Limestone supply

• Gypsum dehydration

Principle

Limestone supplier

MENU

SCRAir

PreheaterESP

30


FGD-Limestone Absorber

Spray fit for

large

absorber

Recycling pump

Mixer

Air

Clean Gas

Original Gas

Spray = simple

Fit for large absorber

Low pressure drop

No block

High Stability

Easy for maintenance

MENU

31


Limestone supply system

MENU

32


Gypsum dehydration

MENU

33


Recycling pump

Cylinder Absorber

Clean gas

demister

blender

Oxidation air

Raw gas

Clean gas

Raw gas

Oxidation air

blender

demister

Recycling pump

Square Absorber

SELECTIVE AND SIMPLE

MENU

34


• High FGD and De-dust• The diameter of absorber can be narrowed.

High gas rate

Big surface shaking of drop

Big mixture drop to promote absorption reaction of SO2 .

Smaller section area of absorber

300MW FGD absorber

4.5 m/s 11.5 m

30

.5 m

4.0 m/s

12.2 m

29

.3 m

3.5 m/s

13.0 m

28

.0 m

3.0 m/s

14.1 m

26

.7 m

(m/s)Gas rate

100

Normal confine

High gas rate confine

SMALL

MENU

35


New low pressure spiral nozzle is used to decrease power of circulation pump and increase De-duct performance of FGD

0

1

2

3

4

5

6

1 2 3 4

ポンプ台数吸収塔出口ばいじん濃度　mg/m3N

従来ノズル

新型ノズル

◎spiral nozzle

low injection pressure and fine mist to increase the de-dust performance and decrease circulation pump power

Used nozzle

（hollow）

New nozzle

（spiral）

98.2

98.4

98.6

98.8

99

99.2

99.4

99.6

1 2 3 4

脱硫効率%

ポンプ台数

従来ノズル

新型ノズル

FGD efficiency

0.1% increase

SO2 reduced 10% at outlet

FGD Efficiency enhanced Outlet Dust decreased

5 3 mg／m3N

Gas outlet

nozzle

demister

Gas inlet

blender

pump

Saving

MENU

100% 80%

0%

50%

100%

Used Nozzle New Nozzle

Power of Recycling Pump

36


Side Atomizer

Characteristics

Easy maintenance High oxidation performance

Side atomizing air injection

Oxidation with less air

Easy maintenance for periodical inspection

Simple configuration inside absorber

Injected air is sheared and broken into fine bubbles

No deposit inside absorber

Air bubbles are spread and recycled in whole absorber tank

video\攪拌機ビデオ.avi

Agitator

Oxidizing Air

•Absorber

ZF 脱硫装置/PR・見積・実工事/海外/PR資料/上海外高橋用PR/video/攪拌機ビデオ.avi

38

Gas Flow 1,629,000Nm3/h

Inlet Temp 147.2℃

Inlet SO2 1800mg/m3N-dry

Inlet Dust 162mg/m3N-dry

Outlet Temp ≧ 81.7℃

Outlet SO2≦ 50mg/m3N-dry

(η=96%)

Outlet Dust ≦ 50mg/m3N-dry

Byproduct Gypsum (CaSO4•2H2O)

Purity ≧ 90%

Moisture ≦ 10wt%

GGH Yes

Baogang Power Plant 3x350MWRetrofitting project

Time of Commission: 2008-2009

FGD Projects

MENUDeNOx FGD Particle Control

FGD-Projects

MENU

39

Pingshan Power Plant 2X660MWNew project

Time of Commission: Feb, 2016

DeNOx FGD


Inlet Temp 87℃



Outlet Temp 44.5 ℃

Outlet SO2≦ 20mg/m3N-dry (η=99%)


Byproduct Gypsum

Purity ≧ 90%

Moisture ≦ 10wt%

GGH No

Particle Control

FGD- Projects

MENU

40

Waigaoqiao 2 Power Plant 2×900MWRetrofitting project

Time of Commission: Dec, 2015

DeNOx FGD


Inlet Temp 90℃



Outlet Temp 49 ℃

Outlet SO2≦ 14mg/m3N-dry

(η=98.47%)


Byproduct Gypsum

Purity ≧ 90%

Moisture ≦ 10wt%

GGH Yes, NL-GGH

Particle Control

Magnesium Desulfurization

41

Gas Flow 1.1*105Nm3/h

Inlet Temp 170℃



Outlet Temp 58℃

Outlet SO2≦ 87.5mg/Nm3-dry

(η=96.5%)


Byproduct No

GGH NoYadong Chemical Plant

Time of Commission: Dec, 2015

MENU

Semi-Dry Desulphurization

42

MENU

Water

Roots blower

Slaked Lime Silo

Belt Scale

Air trough conveyor

Air trough conveyor

Dust Silo

Dust Cleaning

Absorber

Conveyor Fan

IDF

Distributor

Flue Gas

Clean Gas

FGD Comparison

43

MENU

Semi-Dry Wet

De-SOx efficiency ~70% ~99%

Ca/S ratio 1.3~1.5 1.03

Electricity ratio 0.8% 0.9%

Water consumption presume as 1 1.1

Water quality High Low

Absorbent CaO/Ca(OH)2 CaCO3

Negative Effect on ESP High Low

Unit Load following capability Bad Good

Waste Water None Yes

Operation Cost presume as 1 0.7

Investment Cost presume as 1 1.3

Byproduct Gypsum containing dust, low value Pure gypsum

Content




• DeNOx

• FGD

Particle Control

44

MENU

High Efficiency Filter Products Before Absorber

DeNOx FGD

ESP and Bag Filter WESP

High Efficiency Filter Products After AbsorberB a g F i l t e r

MENU

45

Particle Control

E S P H y b r i d F i l t e r

W E S P

46

MENU

Advance-Patent technology

Bi-Corona® PM2.5 3/4 decreased

PM2.5Before

After

TVS Twin valve system AESM Gas consumption 40% decreased

Delta Wing® Top gas distribution technology

WFGD stack particulate emission includes:

Fly Ash Gypsum carryover H2SO4(sulfuric acid) Other Condensable

MENU

47

WESPWESP is the most useful equipment for the fine particulate matter, especially suit for the situation after the WFGD, for the gas here carried much water.

DeNOx FGD

ESP and Bag Filter WESP

Particle Control

48

Thank You

Documents

Flue Gas Cleaning of Coal-fired Power Plant and SEC Technologysteag.in/sites/all/themes/steag/Seminar_2017/Flue_Gas_Cleaning_of... · Flue Gas Cleaning of Coal-fired Power Plant and