Dry FGD System - Mission Energy

1

Dry FGD System~Solution to space restriction

and energy saving~

SOxNOx2019 ConferenceSeptember 12, 2019

Tomoki Kayukawa

Copyright 2019 JGC All Rights Reserved - 2 -

Agenda

1. Company Profile2. Dry FGD General Information3. Dry FGD + Waste Heat Recovery


Introduction of JGC

YokohamaOperations Center

Established in 1928 Net sales: US$ 5.6 Bil. (Fiscal ’18, ending March 2019) JGC group manpower: 10,000 (Domestic: 4,700 + Overseas: 5,300) Experience in over 80 different

countries worldwide


Business Area

Investment

Hydrocarbon Non Hydrocarbon

EPC

LNG

Refinery

GasProcessing

Petrochemicals

Non-FerrousMetal Smelting Nuclear

Pharmaceuticals

Infrastructure EnvironmentResourceDevelopment

New Energy


2. Dry FGD – General Information


Emission Standards

Installation Before 2003 2004~2016 After 2017

Capacity MW <500 ≧500 <500 ≧500 ALL

PM mg/Nm3 100 50 30

SOx mg/Nm3 600 200 600 200 100

NOx mg/Nm3 600 300 100

Hg mg/Nm3 N.A. 0.03 0.03 0.03

New emissions standards (issued by MoEF&CC)

Previous emissions standardsPM mg/Nm3 150~350

SOx, NOx, Hg mg/Nm3 None

Strict standard became effective


A/H ESP

ECO

STAC

K

Stream Unit 1 2 3 Env.Standards

Temp ℃ 310 145 145 -SOx mg/Nm3 800 800 800 <200NOx mg/Nm3 600 600 600 <300Dust mg/Nm3 100,000 100,000 50 <50

1 2 3

ECO : EconomizerA/H : Air HeaterESP : Electrostatic Precipitator

Abbreviations:

Existing Thermal Power Plant

SOx and NOx need to be reduced...


Retrofitting with Wet FGD (Limestone)ECO : EconomizerA/H : Air HeaterESP : Electrostatic PrecipitatorGGH : Gas/Gas Heat ex.FGD : Flue Gas Desulfurization

Abbreviations:

Corrosion protection is required at GGH /stack Waste water treatment is required Limestone slurry may cause severe plugging

A/H ESP Wet FGDGGH

60~80℃145℃

50℃

100℃

310℃

ECO

STAC

K

Low NOx Burner


A/H ESP Dry DeSOx

ECO

STAC

K

Low NOx Burner

Dry FGD

Retrofitting with Dry FGDECO : EconomizerA/H : Air HeaterESP : Electrostatic PrecipitatorFGD : Flue Gas Desulfurization

Abbreviations:

<Key Benefits>Existing stack can be usedNo waste water treatment is requiredAdditional GGH is NOT required

145℃310℃ 125℃ 120℃


Power output： 175MWFlue gas flow rate ： 644,000 Nm3/hLocation： Hokkaido, JapanOperation: Since 1991

Hokkaido Electric Power Co. (HEPCO)

Applied to Coal Fired Power Station

Source: HEPCO’s brochure

More than 25 years operation experiences


Dry-FGD Unit

Adsorbent

Flue gas(High SOx)

Clean gas(Low SOx)

Spent Adsorbent

Adsorbent

SpentAdsorbent

Fly ashSlakedlime

Adsorbent ProductionFGD tower


Typical Design Conditions; Capacity: 120 MW Flue Gas : 557,700 Nm3/h Inlet/Outlet SO2: 1,000 mg/Nm3

DeSOx Efficiency: 90%

Fresh sorbent silo

Spent sorbent silo

20 m × 30 m = 600 m2

16 m

-L FGD Tower260 m2

16.2 m-W

Flexible Layout

Layout shall be optimized based on the site condition

Layout can be proposed even for restricted footprint


3. Dry FGD + Waste Heat Recovery


Waste Heat Recovery from Flue Gas

Wet type FGD system may generate acidic mist, may result in corrosion at downstream

Corrosion in Heat exchanger

Dry FGD system prevents corrosion and enables effective heat recovery at downstream

Dry FGD system; can keep flue gas temperature can reduce acidic dew point by SOx removal


Commercial experiences in China

SCRDry FGDCokes Oven Gas

Waste Heat Recovery

(31.9GJ/h)

Dry FGD SCRSorbent SCR Catalyst

STACK

210,000 Nm3/h

Waste heat recovery improves energy efficiency

Temp: 250~280°CSOx: 400ppmNOx: 1,200ppm

Temp: 150°CSOx: <40ppmNOx: <100ppm


Summary

Tomoki KayukawaJGC, Technology Innovation CenterPhone: +81-45-682-8371E-Mail: [email protected] Thank you very much !!

JGC’s Dry FGD is the only solution to satisfy Environmental Requirementsand to solve your …

Operational Difficulties (including corrosion problems)

Space Restrictions Budgetary Issues

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