2010_0927 cdq_siemens vai handout

© Siemens 2010 All Rights Reserved

SIMETAL COKECoke Dry QuenchingCDQ

28 September, 2010 SOY / I IS MT EAAuthor: Veijola

Coke dry quenching in nut shell

Key features

CDQ is environmentally friendly and safe method for coke quenching Coke cooling by means of inert

circulation gas BAT solution

Economic benefit

Better and more even coke quality Utilization of waste heat into

electricity Unmanned operation Less maintenance

Ecologic benefit

No CO2 emissions Marginal dust emissions No emissions in waste water


CDQ optimizes coke quality and minimizes emissions

Challenge

Nowadays an environmentally sustainabledevelopment is an important issue in cokeproduction. Legal requirements of authorities willallow fewer harmful compounds to be treated. With good plant design and discplined operation, emissions can be cut to very low level.

TypicalCustomer benefit

Low moisture coke with consistent quality save energy in BF process

High pressure steam almost 500 000 t/a per 1.0 MTPA coke results 15-17 MW net power generation

Unmanned operations Low maintenance costs

Environ-mentalbenefit

Marginal CO2 emissions

No dust emissions

No waste waters

Solution

Siemens has opted for SIMETAL Coke DryQuenching (CDQ) process and automationtechnology for their environmentally friendlyfeatures, and also the improved coke quality and enchanced energy economy.

Baosteel COREX® C-3000


Coke dry quenching – description

Typical situationTypical situation

Wet quenching

Pollution problems in the air and water:

- CO2 emissions

- dust emissions

- waste water

Tightening local statutory regulations

How does CDQ work?How does CDQ work?

Coke quenching (cooling) by means of inert circulation gas

Due to process nature the moisture content in coke is close to 0%

As a result of cokecooling process a highpressure steam is generated according to customer preference

ResultResult

CO2 emissionspractically 0

Dust emissionsnegligible

No waste water

High pressure steam 470 000 t/a per 1.0 MTPA coke (for electricity production)


Coke dry quenching process flow

Coke in1050 oC

Hot gas out800 oC

Gas in170 oC

Coke out180 oC

Dust

Dust

Main Fan

Dust

Steam out90 bar500 oC

WasteHeatBoiler

Waterin

Cooledgas

Air

Surplus gas

CoolingChamber

Cyc

lone

s

Main control loopsand measurements Coke transfer controls Coke charging,

discharging and temperature controls

Coke level control in cooling chamber

Pressure control in cooling chamber

Circulating gas analysis and temperature control

Boiler drum level control Steam temperature

control Dust collecting and

transportation controls


Coke dry quenching –good for quality, good for the environment

UnmannedCoke Bucket Car

UnmannedCoke Bucket LifterTransfer Car

Cooling Chamber

Coke Charging

Waste Heat Boiler

Coke Discharging

Dust Catcher

Cyclones

Main Fan

Dust Removal,Dust Collection andDust Transportation Equipment

Siemens VAI offers complete control system with several developments and improvements in process instrumentation and mechanical engineering.


Typical CDQ plant –layout

Hot Coke Bucket Car

Coke Oven Battery Coke Oven Battery

Boiler

Coke Bucket Lifter

Coke BucketMaintenanceTower

CDQControlRoom Cooling Chamber

Coke Dry Quenching Plant

Coke Oven Plant


Coke dry quenching –unmanned coke bucket car

Drive bogie arrangement

AC/DC power supply system

Automatic Positioning

Conductor rail system

Limit switch andPhotocell arrangementfor fully automaticsmooth positioningunder Coke Guide Carand Coke Bucket Lifterhooks

Brake stop arrangement

Coke weighing

DC-drivelocated inElectric Room

Localcontrolunit

PLC controllocated inControl Room

Radio Link Systemfor manual control

What’s innovative? Mechanical engineering,

automation, electrical engineering and field instrumentation

State-of-the-art automation including unmanned coke bucket car operation

Main benefits High reliability Reduced maintenance

costs Accurate, automatic

positioning


Coke dry quenching – material flow, 1 MTPA plant

Raw Material & Supplies CDQ Process Products

Pressure airSteam

Instrumentation air

Cooling water

Nitrogen

Electricity

Chemical Compounds: Nil

Waste water: Marginal

Dust: Marginal

To the Environment

Coke: 112.5 t/h

Excess Gas to Coke BatteryHeating System

Dust to Recycling

Dust to Sinter Plant:1.670 t/h

Feed Water: 4 bar, 62.7 t/h

Coke: 114.2 t/h = 1 Mt/y

Coke

Feed water

High Pressure Steam:58 t/h, 95 bar, 530 oC

Low Pressure Steam:5 t/h, 8 bar


Integrated Process Control -CDQ and Waste Heat Boiler


SIMETAL Coke Dry Quenching Automation

Diagnosis Actions Explanation

Closed-loop control & positioning control

Loco, bucket & liftersCharging & discharging Power generationDust pollution control

Safe operation


Benefitseconomical & environmental focus

HP steam

generation

for electricity

Coke Moisturedown to 0.1 %

Coke QualityStabilization

ReducedEmissions(CO2, dust)


Conclusions – Coke Dry Quenching

Integrated solutions for overall coke making

process including power and emission controls

Fully automated operation controls, reliable

process instrumentation

Cooling chamber design subcontracted

Transparent, well proven optimization concept

Environmental friendly process: no dust, no CO2,

no waste waters

High pressure steam generation (power

generation)


Worldwide Coke Oven Plant References

RSP

Ruukki

WISCO

Przyjazn

ArcelorMittal Poland

ESCO

BSL

TISCO

JISCO

AutomationTechnology

XISC

ArcelorMittal RSA

US Steel

ArcelorMittal Rumania

Isdemir

NINL

VSPBSP

RSP

IISCO

USS Kosice

BSPBSP

RSP

IISCO


Thank you for your attention! Kiitos!

ContactMartti Miettinen, Business Line DirectorOlaus Ritamäki, General ManagerIlmari Veijola, Sales Engineer

I IS MTSiemens OsakeyhtiöElektroniikkatie 6FI-90590 Oulu, FINLAND

Phone: +358 10 511 5151Fax: +358 10 511 6860

E-mail: [email protected]

www.siemens.com/metals

2010_0927 cdq_siemens vai handout

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