AIR QUALITY CONTROL SYSTEMS

Reducing Emission and Creating Value

A one-stop-shop in environmental technologies

MHPS, with self-developed Air Quality Control Systems

(AQCS), is a world leader in energy-related environmental

systems enabling us to face global climate change challenges

from commercial and technological standpoints.

While our steam power plants and industrial boilers answer customer

demands with ultra-high performance levels, our AQCS technologies

– particularly NOx reduction systems (SCR), and Flue Gas Desulfuriza-

tion (FGD) systems – purify the flue gases. Our intellectual property

and know-how lends new-found quality and security to vital indus-

tries, making thermal plants compatible with latest environmental

requirements.

We are the OEM for Nitrogen Oxide Reduction (DeNOx) technology

with extensive experience in the field of direct and indirect

reagent injection for economically optimized and highly efficient

solutions. Our advanced Triple Action Catalyst TRAC® is a superior

technology for mercury removal. Thanks to our wide knowledge and

experience in the field of desulphurization, we provide customized

solutions in new builds, retrofits and upgrades of FGD plants. A

retrofit example is an absorber tray reduction of the SOx emissions

to meet BREF (Best Available Techniques Reference) requirements.

We also employ highly efficient dedusting technologies within our

environmental products portfolio.

NOx REDUCTION TECHNOLOGY

■ Selective Catalytic Reduction (SCR)

System

■ SCR Catalyst

■ Mercury Oxidation Catalyst (TRAC®)

SO2 REDUCTION TECHNOLOGY

■ Wet Limestone-Gypsum Flue Gas

Desulfurization (FGD)

■ Sea Water FGD

DUST REDUCTION TECHNOLOGY

■ Electrostatic Precipitator (ESP)

■ Fabric Filter

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1 SCR (Selective Cata-lytic Reduction System)

2 ESP (Electrostatic Precipitator)

3 FGD (Flue Gas Des-ulfurization)

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From industrial boilers to utility power plants

Whether looking at new builds, upgrades or retrofits of flue

gas cleaning systems, MHPS is the key to cost-efficient

highest -quality solutions. Our specialists review the entire

system from burner to stack and develop the most efficient

and economic flue gas processing facilities that mostly

include firing optimization (primary) and active cleaning

(secondary).

In retrofitting and upgrading existing plants, our specialists initially

look closely into the technology on hand to analyze the entire

system, its individual components and the process chain including

fuel, combustion and flue gas cleaning. Simultaneously, our

in-house EPC team ensures rapid project handling and adherence

to the specified emission standards during operation. This compre-

hensive analysis is conducted for new builds as well. What

distinguishes MHPS is the dedication to quality and customer satis-

faction before delivery of the tailor-made air quality products and

post-commissioning service.

This comprehensive assessment is also used in the construction of

new flue gas cleaning systems – from indusrial boilers to utility

power plants. In this way, we provide our customers with tailored

solutions. The components designed by MHPS Europe and parent

MHPS, Ltd., meet the highest efficiency, availability and service-life

requirements.

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Meeting the new emission limits

MHPS is currently constructing a lignite-fired power

plant which will meet the latest stringent BREF emission

limits, thanks to additional customized measures

undertaken during the execution phase.

NOx EMISSION FROM 200 mg/Nm³ → 85 mg/Nm³

■ SCR reactor incl. MHPS catalyst

MERCURY EMISSION → 4 μg/Nm³

■ SCR with TRAC® (TRiple Action Catalyst) catalyst and

ammonia chloride injection (storage, preparation station

included)

■ ORP (Oxidation Reduction Potential) – Control in FGD

(avoid Mercury Re-Emission)

■ Upgrade of FGD Waste Water system to cover increased

mercury discharge of FGD

■ Injection of activated carbon upstream ESP as back-up

■ Injection of additives like TMT 15 into FGD as back-up

DUST EMISSION FROM 10 MG/NM³ → 5 MG/NM³

■ ESP upgrade by additional field

■ Final reduction of dust emission in FGD

SO2 EMISSION FROM 150 mg/Nm³ → 75 mg/Nm³

■ Change of recirculation pump size, absorber sump size,

drain tank

■ Adjustment of operation (L / G)

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Service for AQCS

Frequently revised environmental goals are leading to new

operational parameters and a permanent need for higher

efficiency levels require existing equipment to be revamped,

retrofitted and / or replaced.

MHPS, as a unique OEM and technology owner, is fully aware of

the requirements placed on not only function but also fail-safety of

components. Comprehensive service and maintenance concepts

have been devised for various system parts, subassemblies and

components in Flue Gas Desulfurization systems.

OUR WORK & SERVICES

ON-SITE SERVICE

■ Servicing inspection / maintenance / repairs

■ Site logistics, standstill management

■ Site management, erection and startup

OPTIMIZATION

■ Refurbishing / revamping / modification and extension

■ Studies, process and detail engineering

■ Capacity adjustment, capacity and flow optimization

■ Spare parts management and procurement

DENOX (SCR / SNCR)

■ Catalysts (SCR) – Cleaning and replacement, retrofitting the CAT

standby level

■ NH3 Station – Maintenance and service

■ Retrofitting TRAC® catalysts for mercury capture

■ Injecting system (SCR and SNCR) – Maintenance and service

■ Variation / adaption of injecting point / quantity and reduction

agents (SCR and SNCR)

DUST EXTRACTION

■ Electrostatic precipitators

■ Fabric filters

■ Converting electrostatic precipitators into fabric filters

■ Cyclones

■ Scrubbers

■ Attemperators

■ Adsorption and additive systems

■ Fly ash and dust extracting components

■ Fans

DESULFURIZATION

■ Inspection and maintenance of the wet FGD

system and attendant components

■ System optimization

■ Modification and extension

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SERVICE EXAMPLE: WET FGD

In operating and maintaining FGD absorbers and their service

equipment, inspections, maintenance and servicing are

needed for fail-safe component running without stoppages

over the envisaged ever-longer operating intervals.

Our wet FGD service currently includes around 4,500 items for all

inspection, maintenance and servicing work on an integrated wet

FGD plant including the associated balance-of-plant.

The service concept starts with the preparatory site installation and

job safety work. It then reviews and evaluates operating records and

ends with the detailed handling steps for maintenance and servicing

of the components based on the manufacturer’s documentation

stipulations and the times specified therein. Modification and opti-

mization steps may also be necessary to adhere to more exacting

standards and optimize efficiency and / or energy.

SERVICE EXAMPLE: ELECTROSTATIC PRECIPITATORS

As part of plant overhauls we undertake all work on electro-

static pre cipitators – whether dry or wet cleaning – of any

design and from any manufacturer. This includes:

■ Inspection, maintenance and repairs of the housing,

fitted / ancillary components and the ceilings (seal tightness test)

■ Inspections and repairs on trace heaters and insulation

■ Work on the rapping equipment

(changing hammers, anvils, shafts and bearings etc.)

■ Changing the insulators

■ Replacing the interior equipment, such as discharge and collect-

ing electrodes

■ Inspection, maintenance and repair of dust conveying equipment

■ Inspection, maintenance and repair of electrical high, medium

and low-voltage equipment and electric drives

SCR1,027 Units (13 Countries)

ESP 3,261 Units (32 Countries)

FGD 323 Units (24 Countries)

COAL POWER PLANT

Westfalen, Germany

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Mitsubishi Hitachi Power Systems Europe GmbH

Schifferstraße 80, 47059 Duisburg Germany Phone +49 203 8038-0, Fax +49 203 8038-1809infobox@eu.mhps.com, www.eu.mhps.com

Mitsubishi Hitachi Power Systems Europe, Ltd.

The Point, 37 North Wharf Road London W2 1AF Phone +44 20 7535 0500 infoboxEU@mhps.com, www.emea.mhps.com

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