24
Solid Fuel Firing Systems and Components

Solid Fuel Firing Systems

  • Upload
    dotruc

  • View
    227

  • Download
    0

Embed Size (px)

Citation preview

Page 1: Solid Fuel Firing Systems

Solid Fuel Firing Systemsand Components

Page 2: Solid Fuel Firing Systems

Mitsubishi Hitachi Power Systems Europe

a

b

c

d

f

e

From Coal to Electricity

Generation of electricity in a typical coal power plant

A Before being injected into the furnace, the raw coal is crushed down to a fi ne pulverized form in the coal mills.

2 Flue gases up to 1,450 °C arise from pulverized fuel combustion in the steam generator furnace. The liberated heat is used to generate high-pressure and high-temperature steam.

3 The steam is directed to a turbine; it fl ows onto the blade wheels and turns the turbine shaft. An attached generator then generates the electrical power.

4 With the help of catalysts, the nitrogen oxides in the fl ue gas react in the DeNOx system to produce nitrogen and water vapor.

5 Ash particles adhere to electrically-charged surfaces in the electrostatic precipitator; they are rapped and removed from the fl ue gas.

6 In the fl ue gas desulphurization system (FGD) lime slurry or suspended pulverized limestone bind the sulphur dioxide coming from the fl ue gas. The fi nal product arising is gypsum.

Contents

Mitsubishi Hitachi Power Systems Europe 2

Selection Criteria 5

Furnace 6

Mill Feeders 8

Pulverizers 10

Pulverized Fuel Burners 14

Burn-Out Grate 20

Ash Removal Systems 21

Replacement Parts Service 23

Page 3: Solid Fuel Firing Systems

Coal Firing Systems 3

Stronger together

The merger of the “thermal power plant” fields of Mitsubishi Heavy Industries, Ltd., (MHI)

and Hitachi, Ltd., has brought about Mitsubishi Hitachi Power Systems, Ltd., (MHPS) – one of

the world’s largest companies in thermal power generation systems.

An important mainstay of this corporate group is Mitsubishi Hitachi Power Systems Europe

GmbH (MHPSE), the successor to Hitachi Power Europe GmbH. The energy plant con­

structor (based in Duisburg) looks back over a +100­year track record in planning and

constructing fossil­fired power plants. MHPSE constructs turnkey plants, supplies key

components (e. g. utility steam generators, environmental engineering equipment, turbines,

burners, grinding systems) and handles service and rehabilitation.

Stakeholders in Mitsubishi Hitachi Power Systems Europe GmbH

MHPSE

MHPS

MHI Hitachi, Ltd.

65% 35%

100%

Mitsubishi Hitachi Power Systems Europe GmbH

Babcock Fertigungszentrum GmbH

Production of first-class components for power plants (e. g. coal mill), mainly for MHPSE

Mitsubishi Hitachi Power Systems Africa (Pty) Ltd.Subsidiary of MHPSE in South Africa

Meeraner Dampfkesselbau GmbHManufacturing of premium components for utility steam generators (e. g. pressure parts) for power plants

Donges Steel Tec GmbHOne of Germany’s leading steel and bridge constructors; manufacturing of steel structures for power plants

MH Power Systems Europe Service GmbHService, rehabilitation and components in the industrial plant field

SUBSIDIARIES AND RELATED COMPANIES

Page 4: Solid Fuel Firing Systems

Firing Systems and Components

Ensuring Economic Efficiency, Conserving Resources

As one of the global cutting-edge companies in power plant design and construction,

Mitsubishi Hitachi Power Systems Europe provides highly advanced firing systems which can

be used in their entirety or as single components for practically all fossil fuel qualities.

MHPSE develops solutions, which are just as flexible as our customers’ requirements, for

energy suppliers and industry alike. This can be seen most clearly from the large number of

different types of references (see table) available. A high degree of operational efficiency and

conservation of resources / environment is looked upon as an obligation and challenge by

MHPSE in designing and manufacturing new utility steam generators. This also applies to the

modernization and enhancement of existing power plants and their components, such as

pulverizers and burners.

It goes without saying that MHPSE as a certificated DIN ISO 9001 company always orientates

itself to the best possible quality.

Project Country Kunde MW Fuel Order obtained

Niederaußem Germany RWE Energie AG 1 x 1,012 Lignite 1995

Boxberg Q Germany VEAG 1 x 907 Lignite 1995

Elbistan B Turkey TEAS 4 x 360 Lignite 1998

Dezhou 5 / 6 China CNTIC 2 x 660 Anthrazit 1998

Hamborn Germany RWE Energie AG 1 x 260 Blast Furnace Gas 1999

Iskenderun Turkey Siemens / STEAG 2 x 660 Hard Coal 2000

Neurath F & G Germany RWE Rheinbraun AG 2 x 1,100 Lignite 2003

Baosteel China Baoshan Iron & Steel Co. Ltd 1 x 350Blast Furnace Gas, Coke Oven Gas, Heavy Fuel Oil

2005

Boxberg R Germany Vattenfall Europe 1 x 670 Lignite 2005

Walsum 10 Germany Evonik 1 x 790 Hard Coal 2006

Moorburg A / B Germany Vattenfall Europe 2 x 820 Hard Coal 2006

Datteln Germany E.ON Kraftwerke 1 x 1,100 Hard Coal 2006

Gent Belgium Electrabel 1 x 300 Blast Furnace Gas 2006

Medupi South Africa Eskom 6 x 790 Hard Coal 2007

Maasvlakte Netherlands E.ON Kraftwerke 1 x 1,100 Hard Coal 2008

Wilhelmshaven Germany Electrabel 1 x 750 Hard Coal 2008

Kusile Südafrika Eskom 6 x 790 Hard Coal 2008

Rotterdam South Africa Electrabel 1 x 790 Hard Coal 2008

Maja India NTPC 2 x 660 Hard Coal 2012

Solapur India NTPC 2 x 660 Hard Coal 2012

Raghunathpur India NTPC 2 x 660 Hard Coal 2012

Kozienice Poland Enea 1 x 1,000 Hard Coal 2012

Selection of steam generator orders since 1995

Page 5: Solid Fuel Firing Systems

Coal Firing Systems 5

What Counts is the Choice

The planning and design of firing systems is primarily dependent on the fuel used and

must be individually tailored – something requiring above-average achievements on the part

of our designers.

Whilst there is no secret about up­to­date firing systems, one still needs considerable

know­how and a long track record in plant concepts and specific sequences. Playing a prime

role here are the fuel properties themselves, such as calorific value, moisture and ash content,

volatiles and coal grindability.

Advanced firing systems with a staged combustion sequence lower emissions and require

substantial design and material selection outlay on the basis of the standards and legislation

in force. This applies equally to the selection and construction of the firing components.

Hard coal

Slag-tap firing system Cyclone firing system

Tangential firing system

U/double U firing system

Double front firing system

Front firing system

Opposed firing system

Corner firing system

Direct firing system with vapor separation

Direct firing system

Direct firing system with vapor recycling

Double front firing system

Opposed firing system

Dry bottom ash firing system

Normal volatile coal

Low volatile coal

Dry bottom ash firing systemLignite

Direct firing system

Indirect firing systemDry bottom ash firing systemBiomass

Page 6: Solid Fuel Firing Systems

Furnace

Pulverized Hard Coal Firing System

Fossil-fired power plants are currently enjoying a boom across the world. And hard coals,

in particular, can be widely used for energy transformation purposes.

The decision to design a firing system with dry bottom ash removal or as a slag­tap furnace

largely depends on the fuel properties themselves. Volatile matter, ash content and chemical

ash composition have always been of decisive significance.

The decision­making process was simplified with the launching of innovative DS® burners

followed by tremendous combustion stability. Modern steam generators are usually designed

today solely as dry ash discharging boiler plants at low cost and high efficiencies. This applies

to practically the entire range of fuels irrespective of their effects from high volatile bituminous

coal to anthracite.

For many years now, the linear arrangement as front, double­front or opposed firing equip­

ment complete with vertically offset burner levels has proved to be the most suitable system

for pulverized hard coal firing systems.

The clear arrangement of mill and burner level ensures that the highly complex systems are

clearly designed and arranged. This, in turn, creates a high degree of accessibility and ease

of maintenance.

The principal features are:

■■ Uniform liberation of heat

■■ Low nitrogen oxide emissions coupled with practically a total fuel transformation

■■ Oxygen-rich flue gas atmosphere right next to the boiler tube walls

CAD model of the Datteln 4 utility steam generator

■■ 1 x 1,100 MWel / 1 x 2,939 t/h

■■ Benson® Steam generator

■■ Hard coal

■■ Steam parameters: Superheated steam: 600 °C / 305 bar; Reheater: 620 °C / 78 bar

■■ Entering into service: 2011

■■ Scope of delivery: Utility steam generator including all the related components, engineering, installation and commissioning

Page 7: Solid Fuel Firing Systems

Coal Firing Systems 7

Pulverized Lignite Firing System

Combustion systems for lignite operated steam generators can be designed as direct

systems for the use of raw lignite or as combined systems using raw and pre-dried lignite

in the same furnace.

Even with the usage of very high ash lignites, the new MHPSE lignite swirl burners (RS® burn­

ers) do not need any vapor separation.

The excellent igniting stability of the RS® burners allows the burners to be arranged in a

different way at the combustion chamber – for instance in the form of an all­wall firing system.

Such a system combines the benefits of linear firing equipment with those of a tangential

firing system. The firing steps alone enable the 200 mg/m3 NOx standard to be undercut in

RS® burners. As a result, there is no need for complex, multiple air­staging concepts for

adherence to the NOx standards.

The stable ignition of RS® burners produces a marked improvement in the percentage load

operations of lignite firing systems. Even with problematical fuels, the excess stoichiometric

operation of these burners has a positive effect on fouling and slagging and it optimally

protects the evaporator tube walls from corrosive flue gas products.

The future will see boiler plants mainly being planned for the use of dry pulverized lignite with

interim storage.

CAD model of the Boxberg R utility steam generator

■■ 1 x 670 MWel / 1 x 1,710 t/h

■■ Benson® Steam generator

■■ Lignite

■■ Steam parameters: Superheated steam: 600 °C / 315 bar; Reheater: 610 °C / 72 bar

■■ Entering into service: 2010 / 2011

■■ Scope of delivery: Utility steam generator including all the related components, engineering, installation and placing into service

Page 8: Solid Fuel Firing Systems

Mill Feeders

Reliability even under Demanding Requirements

Designed as coal bunker dischargers, the mill feeders supply the pulverizers with raw coal –

evenly dosed and in keeping with boiler load requirements.

Even under very demanding requirements, the Mitsubishi Hitachi Power Systems Europe

designed mill feeders operate both reliably and safely.

Experienced MHPSE staff establish the optimum feeder in keeping with the requested fuel

quantity, design directives (including DIN EN 12952­9, NFPA 85 F) and customer require­

ments (for instance, volumetric and gravimetric metering).

Other selection factors are the various bulk material properties, such as coal flow and erosion

behavior. The belt speed is determined by the quantity conveyed. Purge air is supplied to the

housing to stop condensate forming and, in turn, to stop corrosion.

Belt conveyor

Page 9: Solid Fuel Firing Systems

Coal Firing Systems 9

In hard coal boiler units, belt conveyors are used to discharge the raw coal from the bunker.

In lignite plants, drag-chain conveyors together with belt conveyors are used to discharge the

raw coal from the bunker.

Belt conveyor

The belt conveyor with corrugated edge belt ensures high outputs, uniform bunker discharge

and continuous mill charging – even under low conveying rates. This design permits volumet­

ric / gravimetric metering and quantities conveyed of up to 120 t/h. Conveyed material falling

to the bottom of the feeder is transferred to the coal downcomer by the simultaneously

running scraper chain.

Drag-chain conveyor

Drag­chain conveyors are meant for limited conveyed quantities of up to approx. 40 t/h –

this can, in special cases, be raised to 70 t/h. The fuel is discharged opposite to the direction

of conveying. The drag­chain conveyor principle allows both a compact design with minimum

spacing between bunker discharge and conveyor dumping as well as a possible large

spacing between material charging and dumping.

A Bed depth limiter

B Belt drive station

C Tensioning station

D Forged fork link chain

E Bunker shut off gate

A Bed depth limiter

B Belt drive station

C Belt tensioning station

D Corrugated edge belt

E Scraper chain

F Lower belt supporting roller

G Bunker shut off gate

Conveyor-type weigher (optional)

Raw coal

a

h

d

b

e f

c

g

Raw coal

a

d

b

e

c

Page 10: Solid Fuel Firing Systems

Pulverizers

b

c

d

fg

e

a

Excellent Results

In the mills, the raw coal is simultaneously pulverized, dried and evenly distributed to the coal

burners. Hot air or flue gases transfer the pulverized fuel to the burner and reduce the mois-

ture in the coal.

MPS® Bowl & Roller Mill

The MPS® bowl & roller mill from Mitsubishi Hitachi Power Systems Europe grinds and dries

hard coals and difficult­to­grind lignite with a low moisture content to pulverized fuel and

distributes them evenly directly to the burners.

Various­sized mills for throughputs ranging from 10 t/h to 200 t/h can be supplied. Constant

refinements and impro vements have led to excellent crushing results with high fineness

grades from raw coal found throughout the world. The positive operating

properties and low energy requirements have contribu ted in no small

measure to the success of these mills.

MPS® Mill

A Rotary classifier

B Classifier drive

C Grinding rollers

D Hydro-pneumatic system

E Grinding table

F Gear

G Motor

Page 11: Solid Fuel Firing Systems

Coal Firing Systems 11

a

b

c

d

f

g

e

Long Service Life

RKD Tube Ball Mill

The Mitsubishi Hitachi Power Systems Europe RKD tube ball mill grinds and dries difficult­to­

pulverize hard coals (particularly low­volatile coals such as lean coal and anthracite).

This mill type can deal with approx. 150 t /h of coal. Depending on size and space, the tube

ball mill can be designed with drum or neck bearing and be of the single or double pass type.

RKD Mill

A Rotary classifier

B Oversize return

C Neck bearing

D Drive gear rim

E Grinding ball filling

F Feed spiral conveyor

G Classifier riser

Page 12: Solid Fuel Firing Systems

Low Energy Requirements

Pulverizing lignite is particularly challenging in view of its high moisture content and the

considerable throughputs involved. Here again Mitsubishi Hitachi Power Systems Europe

has the right products in this segment.

DGS® Integral Fan Distributor and Beater Mill

MHPSE supplies DGS® mills of various sizes up to a 180 t/h throughput for drying and pulver­

izing raw lignite and brown coals with a high moisture content.

DGS® technology involves the raw coal and flue gases being initially put through the pre­

crushing beater section of the beater wheel. This ensures excellent air and coal dust distribu­

tion into the beater wheel. Crushing in the DGS® mill is usually so

intensive that adequate grinding fineness can be obtained in one

working operation – without the need of an additional classifier.

This both raises the pressure balance and cuts back on energy

requirements. The DGS® mill has stood the test of time par­

ticularly with difficult­to­work lignites – something that explains

its considerable lifetime and unrivalled properties.

DGS® Mill

A Flue gas gate valve

B Inlet housing

C Beater shaft

D Beater wheel

E Coupling

F Motor

G Bearing

g

e

f

c

a

b

g

d

Pulverizers

Page 13: Solid Fuel Firing Systems

Coal Firing Systems 13

Easy Maintenance

NV Wet Coal Fan Mill

The NV mills ranging from 10 t/h to 140 t/h throu ghputs are for crushing high moisture

content lignites for direct injection into the furnace.

Together with the flue gases, the raw lignite is brought for crushing purposes into the beater

wheel. It acts as a fan impeller fitted with beater plates. Baffle­type classifiers ensure that the

required fuel fineness for combustion is fulfilled.

The high­tech NV mill more than meets the ongoing demands

worldwide of operational availability and low costs.

A Gate valve housing

B Grinding chamber door

C Grinding chamber

D Beater wheel

E Baffle-type classifier

F Double bearing

G Motor

NV Mill

b

c

d

gf

a

e

Page 14: Solid Fuel Firing Systems

Pulverized Fuel Burners

Optimum Combustion

How do you lower NOx emissions and at the same time control as many different fuels as

possible? Questions like these are today determining the concept of pulverized fuel firing

systems and burners.

DS® burners were introduced early in the 1990s and continuously developed over the years.

The burner’s principle is focused on fuel treatment to prepare the particles for the pyrolysis

and ignition process that follows. The characteristic features of this burner type are expressed

by the definition of initiation and course of ignition.

Ignition = Pyrolysis + Oxidation

This type of burner with a concentric design and swirled flow streams in all sections, has its

field of application mostly in direct firing systems using all kinds of pulverized fuels.

The DS® burner concept utilizes operating experience from more than 1,100 applications.

300

250

200

150

100

50

0 0

200

400

600

800

1,000

1,200

1,400

1,600

1,800

1991 1993 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015

88

19

0

88

120

260

72

20

8072

0 0

64

24

016

30

138

184

120

60

309

120

129

263

383

643

859 879959

1,0311,095 1,119 1,135

1,1651,303

1,4871,607

1,667 1,697

17546

787144

■ Total number ■ Year of commissioning

Fuel Nozzle

Secondary Air Tertiary AirPulverized FuelAdjustable Swirlers

Core Air

Igniter

DS® Burners

Page 15: Solid Fuel Firing Systems

Coal Firing Systems 15

DS® burners with an operating range of 1: 3,5 are available for direct operated combustion

systems in a range of thermal capacities from 20 to 100 MW.

Basically developed for bituminous coal, these burners are applicable now for all carbon

containing solid fuels like anthracite, sub­bituminous coal, lignite and biomass of different

structures. The DS® burner is suitable for applications with individual air control as well as for

the use in common windboxes.

DS® burner design for a windbox arrangement

Fuels Burner Classes (MW thermal capacity)

20 40 60 80 100

Lignite* x x x

Sub­bituminous coal x x x x

Bituminous coal x x x x x

Anthracite x x x

Biomass (co­firing with coal) x x x x

Biomass (standalone) x x

* Pulverizer operation on air basis

Page 16: Solid Fuel Firing Systems

Pulverized Fuel Burners

DST Burner

The DST burner has been developed on the basis of the DS® burner concept for use in

indirect fi ring systems.

This burner type is the right one for pre­dried pulverized fuels like anthracite, bituminous and

sub­bituminous coal, lignite, peat, biomass of various types as well as further carbon­con­

taining pulverized fuels separately or in any combination. Dust loading can range from 0.5 up

to 15 kg fuel / kg medium.

DST burners can be used for atmospheric operation or in pressurized systems with air and / or

oxyfuel atmosphere.

Air, inert gas and fl ue gas with or without oxygen enrichment can be used as the transport

medium for the fuel.

DST burners can be operated with a turndown rate up to 1:17. As a result a boiler can be

operated from lowest start­up load up to full load conditions with an unlimited load response

rate. Due to an extremely high PF / PA ratio the NOx emission rate is rapidly reduced.

DST burners are available for thermal capacities from 20 to 60 MW for all kinds of pre­dried

pulverized fuels used in indirect fi ring systems.

Fuel Nozzle

Secondary Gas Tertiary GasPulverized Fuel

SwirlerCore Gas

Oil Lance

Fuels(pre-dried & pulverized)

Burner Classes (MW thermal capacity)

20 40 60

Lignite x x x

Sub­bituminous coal x x x

Bituminous coal x x x

Anthracite x x x

Biomass (standalone) x x x

Page 17: Solid Fuel Firing Systems

Coal Firing Systems 17

Energy storage and plant flexibility are the main challenges of power generation in the future.

With the DST burner control range of 1:17 coal firing systems will be best prepared to meet

the resulting operating demands.

DS® burner direct (left)

DST burner indirect (right)

4

5

3

2

1

00 5 10 15 20 25 30 35 40 45

Burner control range (as tested)

Direct firing system, DS® burner

Indirect firing system, DST burner

Indirect firing system, DST burner

minimum load range

Comparison of both burner systems

Burner capacity [MW]

Coal

/ PA

Ratio

[kg/

kg]

Page 18: Solid Fuel Firing Systems

DST Burner

Flexibility is what is demanded of power generation now and in the future. With development

of the DST burner, flexible concepts using indirect firing systems are now becoming the focus

of interest.

This system offers lots of advantages like:

■■ Turn down of investment and operating costs

■■ Independency of mill and boiler operation

■■ Wide load range with all burners in service

■■ Quick response in case of high load change demand

■■ Boiler operation without supplementary fuel (oil / gas) – even for start­up

■■ Exact definition of burner air ratios that enable boiler excess air below 10 %

The combined firing system using the advantages of the direct and indirect systems is the

consequential answer to the fascinating questions surrounding coal fired power plants in

facing the challenges of the future.

M M M M

M

M

M 20 M 40 M 30 M 10

M

M

M

M

M

M M

MM

M

M

M M

Combined firing system

100 %

75 %

50 %

25 %

0 %Flexible Load Range

Pulverized Fuel Burners

Page 19: Solid Fuel Firing Systems

Coal Firing Systems 19

RS® BurnersOrders since 1994

RS® Burner

The extensive findings acquired from developing DS® burner technology (flame stability, igni­

tion as well as air staging in the burner proximate zone) are also available for lignite firing

technology purposes.

What has been developed is the lignite RS® burner. In contrast to the conventional jet burner,

the RS® burner permits control of the fuel / air mixture and flame propagation in the burner

proximate zone.

60

50

40

30

20

10

0

140

120

100

80

60

40

20

01994 1996 1998 2000 2002 2004 2006 2008 2010

44

04

610

010 6

16

0

16

0

24

0000 0

24

48

64

12

76 76

100 100 100 100 100 100 100

124

2012

18

142

0 0

124

70 160

■ Total number ■ Year of commissioning

Secondary Air

Coal Dust Cooling Air

Pulverized Fuel

Secondary Air Deflecting Cone

Radiant Shielding Pipe

Page 20: Solid Fuel Firing Systems

Burn­Out Grate

A Boiler furnace hopper

B Refractory jacket of retarded combustion reactor

C Water seal gasket

D Firmly fi xed grate supporting bars

E Grate carriage

F Grate surface

G Hydraulic system for grate carriage and deashing fl ap

Ash hopper

Cooling and combustion air

J Deashing fl ap

K Ash discharge chute

Shutoff gate valve in ash discharge chute

Deasher

Monitoring system

High Effi ciencies

In lignite coal or peat-fi red plants with a high proportion of xylitol or fi bers in the fuel,

the proportion of unburnt residue in the boiler hopper ash can be extremely high and this

impairs fi ring effi ciency.

The optimum designed burn­out grate ensures that the ash burnout in the boiler hopper is

improved to over 80 % – thus substantially raising the overall effi ciency of the boiler plant.

In addition, afterburning results in additional heat input into the boiler hopper, which would

otherwise be relatively cold. This leads to an even distribution of temperature in the furnace.

Asha

fd

e

g

h

j

k

b c

i

Burn-out grate diagram

Page 21: Solid Fuel Firing Systems

Coal Firing Systems 21

Ash Removal

Submerged scraper conveyor functions:

■■ Air sealing to the boiler hopper

■■ Ash cooling

■■ Ash conveying

■■ Inlet for furnace inspection

1 Bottom ash

2 Transfer chute with immersion piece

3 Expansion joint

4 Submerged scraper conveyor

5 Drive station frequency controlled

6 Tensioning station

7 Idler stations

8 Discharge chute

9 Cooling water inlet

J Overflow

K Travelling rails

Submerged scraper conveyor

Stable in the Extreme and Long Lasting

Ash removal systems have been part of MHPSE’s range of production and supplies for many

years now. This applies to bottom ash removal as well as to the transfer of ash accumulating

in the course of air heater and electrostatic precipitator ash removal.

c

f

e

h

i

k k gg j kd k

a

a bc i f

e

h

k g j k d k g

Submerged scraper conveyor for hard coal-fired systems

Submerged scraper conveyor for lignite-fired systems

➞➞Conveying direction

Page 22: Solid Fuel Firing Systems

Other Ash Removal Systems

MHPSE provides a broad range of ash handling systems. These systems apply to ash handling

for furnace bottom ash removal and also to the ash removal from all downstream ash

accumulation points.

Our systems offer a lot of benefits: they are stable in the extreme, wear parts are long lasting

and both the energy requirements and operating / upkeep costs are low. MHPSE provides

the entire range for utility steam generators with pulverized hard coal and lignite firing: from

design, manufacturing and erection up to commissioning the complete ash disposal systems

including loading systems for transport by truck, rail and ship.

Ash Removal Components

■■ Ash silos and dewatering bunker

■■ Single­strand chain conveyors

■■ Apron conveyor

■■ Screw conveyors

■■ Single and double roller crushers

■■ Hammer crushers

■■ Rotary feeders

■■ Single and double pendulum flap

■■ Shut off gates

■■ Ejectors

■■ Bucket­type conveyors

■■ Sluice ways

Our Other Ash Removal Systems

■■ Dry mechanical ash removal systems

■■ Hydraulic ash removal systems

■■ Pneumatic ash removal systems

■■ Mill reject systems

■■ Re­cooling systems for submerged

conveyor overflow water

Page 23: Solid Fuel Firing Systems

Coal Firing Systems 23

Replacement Parts Service

As a designer and manufacturer of original components, MHPSE is the ideal partner to contact

when modernization or replacement parts are needed.

Our extensive expertise derived from designing and delivering utility steam generators

with the associated components over many years enables our MHPSE experts to provide

professional solutions matched to customer requirements in the matter of plant design and

operations. Optimized plants ensure that performance and availability are raised and that

effi cient operations are attained as far as possible. As a competent and fl exible partner,

MHPSE’ expertise is available in the fi elds of process engineering, plant optimization, measur­

ing technology, plant­internal inspection, component installation and commissioning. At the

same time, MHPSE supports customers in the design and confi guration of their future

plants – from the technical point of view (planning, design, optimizing) and in the matter of

operating economy analyses.

Rapid Service from a Competent PartnerManufacturing from a single sourceAs stakeholder in Babcock Ferti­gungszentrum GmbH in Oberhau­sen, we are in the closest possible contact with our partners and, as such, are fl exible and quick in handling your enquiries and can provide you with dependable so­lutions. More on this under:

www.bfz-ob.de

Service Hotline: +49 2065 4221­960

Service Fax: +49 2065 4221­997

Email: [email protected]

Feedersconveyor Coal Mills Burners Ash submerged

scraper conveyor

Belts Wear partsPulverized fuel line elbows

Chains

Chains Linings Pulverized fuel lines Scraper bars

Drives Nozzle rings Impact plates Wear plates

Bearings Shaft seals Housings Drives

Gate valves Feeding screw conveyors

Adjusting mechanisms

Conveyor­type weighers

Beater sections Bearings

Expansion joints Gear units

Drives

Page 24: Solid Fuel Firing Systems

MITSUBISHI HITACHI POWER SYSTEMS

EUROPE GMBH

Schifferstraße 80, 47059 Duisburg, Germany

Phone +49 203 8038-0, Fax +49 203 8038-1809

[email protected], www.eu.mhps.com

© M

itsub

ishi

Hita

chi P

ower

Sys

tem

s E

urop

e G

mb

H /

02.2

014

/ Pri

nted

on

chlo

rine

-fre

e b

leac

hed

pap

er