Lc-6 Flue Gas Monitoring for Coal Fired Thermal Power Plant

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  • 1Technology TransferTechnology TransferFlue Gas Monitoring Flue Gas Monitoring

    for Coalfor Coal--fired Thermal Power Plantfired Thermal Power Plant

    July 2010J-POWER Tachibanawan Thermal Power Plant1,050MWx2Units)

    2

    Content of Presentation

    Introduction

    Air Quality and Emission Standards

    Flue Gas Treatment Facility

    Flue Gas Monitoring System

    Manual Measurement of Flue Gas

    Introduction

    Air Quality and Emission Standards

    Flue Gas Treatment Facility

    Flue Gas Monitoring System

    Manual Measurement of Flue Gas

  • 3Program-1: IntroductionProgram-1: Introduction

    4

    The leading part of the energy sources used all over the world consists of fossil fuel such as coal and heavy oil. When any kind of the fossil fuel is converted into energy, it always generates nitrogen oxide (NOx), dust and sulfur oxide (SOx), all of which cause air pollution.

    Japan has experience of that various types of bronchus-related disease including asthma were caused by air pollution in areas dense with factories during 1960s. In those days, there were not enough air pollution control equipment in the country.Facing the problem, the Japanese Government established Air Pollution Control Law in the '70s. This movement rapidly developed air pollution control technology. Since then, more and more air pollution control systems have been introduced in plants in earnest.

    The following shows the typical flue gas treatment system for coal-fired boilers currently used in Japan:

    INTRODUCTIONINTRODUCTION

    Gas-gas heater(GGH)

    Boiler

    Gas air heater

    Electric precipitator

    DeSOx(FGD) System

    Desulfurizationdraft fan(BUF)

    Stack

    DeNOx(SCR) System

    Forced draft fan

    Induceddraft fan

  • 5Electricity pricing:

    Electricity rates in Japan are based on the average cost of supplying electricity. This method, The Total Cost of Services Method, is stipulated in Article 19 of the Electricity Utilities Industry Law. The article provides that general power utilities draw up a supply contract, including electricity rates, and obtain authorization of the Central Government such as METI.

    The contract will be authorized if the METI thinks it reflects proper costs, based on efficient business management, plus fair return. Proper costs are calculated by adding up expenses for personnel, fuel, maintenance, and depreciation, as well as costs for wastewater treatment, exhaust gas treatment, and other environmental measures. Fair return is calculated on the Rate Base Method by multiplying business assets invested (including facilities for generation, transmission, and distribution) by a certain rate of return. Adding up the above-mentioned costs and remuneration and deducting the target figure for management effort gives the total cost, which is used as the basis for calculating electricity rates.

    The cost calculation method allows electric power companies to take necessary measures to protect the environment and pass on the costs to consumers, thus recovering the environmental cost of power generation. Although this system tends to drive up the electricity price in Japan (it is higher than in other countries), it was Japans choice to spend more on environmental protection and energy security.

    INTRODUCTIONINTRODUCTION

    6

    Government Subsidies for Environmental MeasuresThe biggest problem implementing environmental measures is economic.Environmental equipment requires large amounts of initial investment and funding, and operating, and operating the equipment requires power to run the devices and expendable supplies like treatment chemicals. Power generation itself requires large amounts of capital investment, and additional investment significantly burdens companies. Electric power companies must be socially responsible and take environmental measures while meeting their responsibility to provide a steady supply of energy at an affordable price.

    The government has introduced assistance programs to relive the financial burden and to give business the incentive to protect the environment. Following are the main efforts by the government to support environmental measures in the electric power industry: (1) a low-interest-rate loan program through the Japan Development Bank for pollution control facilities, energy efficiency enhancement facilities, and recycling facilities; (2) preferential tax treatment through accelerated depreciation of equipment for environmental measures, reduction or exemption of fixed property taxes related to environmental facilities, and tax deductions on energy-saving technology R&D; and (3) subsidy for R&D of environment-friendly technology.

    INTRODUCTIONINTRODUCTION

  • 7Program-2:

    Air Quality and Emission Standards

    Program-2:

    Air Quality and Emission Standards

    8

    Environmental Survey to Environmental MonitoringEnvironmental Survey to Environmental Monitoring

    Prediction and Evaluation of

    Impact on Environment

    Prediction and Prediction and Evaluation of Evaluation of

    Impact on Impact on EnvironmentEnvironment

    Countermeasures of Environmental

    Conservation

    Countermeasures Countermeasures of Environmental of Environmental

    ConservationConservation

    Environmental Monitoring

    Environmental Environmental MonitoringMonitoringConstructionConstruction

    EmissionStandard

    Environmental Quality

    Standard

    EIA surveyEIA survey

    Regulation

    MonitoringExhaust gas,Waste water,

    Sound, etc

    MonitoringMonitoringExhaust gas,Exhaust gas,Waste water,Waste water,

    Sound, etcSound, etc

    ++

    Environmental Survey

    Environmental Environmental SurveySurvey

    Surveys on the conditions undertaken at the planned power plant

    Plant operation

    EmissionStandard

    New valueNew value

  • 9Why is the Monitoring of SOx, NOx etc necessary?

    It affects the Human healthand is also a substance causing Acid Rain

    Air polluted by NOx causes disease of Human respiratory organs(Nose, throat and breast hurt, breath difficulty, cough, sputum)

    Photochemical Oxidant arises by the photochemical reaction, and it cause not only bad influence to Human membrane and breath, but also affects Plant Growth (Agricultural products).

    SPM sticks to Human respiratory tract and lungs, and causes a Respiratory-organs disease

    NOx:NOx:

    SOx:SOx:

    SPM:SPM:

    ++HCHC

    Regulation

    10

    WHO World Bank

    Vietnam TCVN5937-1995

    Japan Pollutant

    g/m3 g/m3 g/m3 g/m3 ppm

    SO2 Annual 24 hr 8 hr 1 hr

    40-60 110-150

    - -

    80 150

    - -

    - 300

    - 500

    - (110)

    - (286)

    - 0.04

    - 0.1

    NO2 Annual 24 hr 8 hr 1 hr

    - 150

    - 400

    100 150

    - -

    - 100

    - 400

    - (82-123)

    - -

    - 0.04-0.06

    - -

    SPM Annual 24 hr 8 hr 1 hr

    - 70 - -

    50 150

    - -

    - 200

    - 300

    - 100

    - 200

    - - - -

    *Japanese 24hr Ave: Daily Average of hourly values*Parenthesis indicates converted value

    Comparison of the Environmental Air Quality StandardsComparison of the Environmental Air Quality Standards

    Regulation

  • 11

    Comparison of the Emission StandardsComparison of the Emission Standardsfor Coal fired Power Plantfor Coal fired Power Plant

    Regulation

    50

    750(365 ppm,

    260 mg/MJ)

    2,000(700 ppm)

    100 - 500 t/d

    World Bank

    411 (700*103 Nm3/h)*514 (400~700*103

    Nm3/h)*

    850850NOxmg/Nm3

    *: Exhaust gas volume

    Remarks

    50~100 (>200*103Nm3/h)*

    100~200(40~200*103Nm3/h)*

    98.9170Dustmg/Nm3

    K-Value ruleExample of 500MWK: 3.0 600K:17.5 3,457

    425425SO2mg/Nm3

    JapanGuaranteedParameters

    at Nghi Son 1

    VietnamTCVN7440-2005

    Pollutant

    12

    Environmental Management in Thermal Power Plants

    Control of facilitys efficiency

    Control of environmental pollutants

    Dealing with local residents and government concerning environmental issues

    O&M of environmental management system

    E M S

  • 13

    Efficiency Control of Equipment

    Efficiency of the boiler and turbine Dust collection efficiency of the electric precipitator Efficiency of the denitrification facility Efficiency of the desulfurization facility Efficiency of the waste water treatment facility

    E M S

    14

    Control of Pollutants

    Emission gases (SOx, NOx, dust, O2)

    Water quality (PH, COD, N, P, etc.)

    Noise Vibration

    E M S

  • 15

    Program-3:

    Flue Gas Treatment Facility

    Program-3:

    Flue Gas Treatment Facility

    16

    Environmental conservation countermeasuresfor thermal power plant

    Flue Gas Treatment Facility

  • 17

    Flue gas treatment facilityFlue Gas Treatment Facility

    18

    Boiler

    ESP SCR AH GGH GGHFGD

    Boiler outletSO2: 3150 mg/m3NOx: 620 mg/m3Dust: 22600 mg/m3

    Agreement valueSO2: 283 mg/m3NOx: 123 mg/m3Dust: 40 mg/m3

    Flue Gas Treatment System at Matsuura PS Flue Gas Treatment System at Matsuura PS (1000MW(1000MW2u)2u)

    ESP SCR

    Stack

    FGD

    FlueGas

    Flue Gas Treatment Facility

  • 19

    DustDust Removal TechnologyRemoval Technology-- ESPESP

    Flue Gas Treatment Facility

    20

    DustDust Removal TechnologyRemoval Technology-- ESPESP

    Flue Gas Treatment Facility

  • 21

    Flue Gas Treatment Facility

    22

    130

    Dust 150 mg/m3N

    Boiler

    SOx SOx ControlControl -- FGD SystemFGD System

    Gypsum Proce

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