Environmental Auditing Reportdocuments.worldbank.org/curated/en/193861468019145908/pdf/E17… ·...

Project Proposal for World Bank Global Environment Fund

Shanxi Yangguang Power Generation Company Ltd.

Environmental Auditing Report

Shanxi Yangguang Power Generation Company Ltd.

China Institute for Radiation Protection

November 2007

E1786 V10

Pub

lic D

iscl

osur

e A

utho

rized

Pub

lic D

iscl

osur

e A

utho

rized

Pub

lic D

iscl

osur

e A

utho

rized

Pub

lic D

iscl

osur

e A

utho

rized

Pub

lic D

iscl

osur

e A

utho

rized

Pub

lic D

iscl

osur

e A

utho

rized

Pub

lic D

iscl

osur

e A

utho

rized

Pub

lic D

iscl

osur

e A

utho

rized

II

Table of Content 1. Preface 2. Overview 2.1 Overview of the Enterprise 2.2 Enterprise Organization 2.3 Notes on the Auditing Issues 3 Overview of the Present Engineering at Shanxi Yangguang Power Plant 3.1 Geographical Location 3.2 Overview of the Engineering 3.3 Land Occupation 3.4 Power Plant Planar Setup 3.5 Energy and Raw Materials 3.6 Ash and Slag Disposal and Overview of Ash Yard 3.7 Process Flow and Polluting Points 4. Main Pollutants Emissions and Control Measures in the Power Plant 4.1 Air Pollutant Emissions and Control Measures 4.2 Wastewater Discharge and Control 4.3 Noise Pollution and Control 4.4 Solid Waste Disposal and Pollution Control Measures 4.5 Overview of the Newly Constructed Environmental Protection Projects in Yangguang Power Plant in Recent Years 4.6 Summary 5. Environment Management and Monitoring 5.1 Environment Management 5.2 Environmental Monitoring 5.3 Summary 6. Work Safety Management in the Power Plant 6.1 Work Safety Production Management 6.2 Regulations on Work Safety 6.3 Implementations of Work Safety Regulations 6.4 Results form Checks by Superior Authorities 6.5 The Yearly Accident Statistics in the Power Plant. 6.6 Summary 7. Hazardous Chemicals Management in the Power plant 7.1. Property Analysis of Toxic, Hazardous, Flammable and Explosive Materials 7.2 Risk Identification 7.3 Present Management of Hazardous Chemicals 7.4 Existing Problems and Solutions to Management of Hazardous Chemicals 7.5 Summary 8. Overview of Industrial Hygiene in the Power Plant 8.1 Regulations on Occupational Disease Control 8.2 Occupational Disease Control Plan 8.3 Funds for Occupational Disease Control 8.4 Present Occupational Disease Control 8.5 Summary

III

9. Emergency Response Plan in the Power Plant 9.1 Compilation of Emergency Response Plan in the Power Plant 9.2 Overview of Emergency Response Plan in the Power Plant 9.3 Summary 10. Social Impacts 10.1 Relationship between the enterprise and employees 10.2 Relationship between Enterprise and Local Residents 10.3 Relationship between Enterprise and Society 10.4 Summary 11. Auditing Conclusions 11.1 Conclusions: 11.2 Suggestions

Environmental Auditing Report for Energy Conservation Project in Yangguang Power Generation Company Ltd.

China Institute for Radiation Protection 1

1. Preface The objective of the environmental auditing is to retrospect the existing production facilities

in the Power Plant, to identify the problems of present production process, pollution control measures, environmental management, safety management and social impacts, etc., and to propose solutions accordingly.

An environmental auditing can effectively reveals the problems of enterprise in

environmental management, and enhances the environmental protection awareness among the relevant departments in the enterprise for strict implementation of environmental protection policies. It also helps the enterprise to build a favorable and responsible image in the light of long-term development and social responsibility, through attaching importance to environmental protection in order to enhance the environmental protection awareness in the whole society.

Shanxi Yangguang Power Generation Company Ltd. was established in December 1993, and

its four power generation sets were put into production in November 1999, presently as one of the key power plant in Shanxi Power Grid, with installed capacity is 4×300MW. The power plant has 1542 employees, with registered capital of 1.1 billion RMB. In 2006 the annual power generation was 8.23 billion KWh, and the resulting sales revenue was 1.85994 billion RMB including net profit of 122.55 million RMB; the profit plus tax of 491.17 was million RMB. While converting coal into power energy, the power plant consumes huge amount of coal and water resources and emits substantial pollutants like SO2, particulates, NO2, etc. into the environment.

This document reports the environment auditing results on the measures presently taken by the Power Plant in environmental control and management.



2 Overview 2.1 Overview of the Enterprise

Shanxi Yangguang Power Generation Company Ltd. was from the former Second Power Plant of Yangquan, Shanxi, as a national key project of the “8th-five-year plan” with total investment of 5.5 billion RMB. The total installed capacity consists of 4×300MW coal-fueled turbine power generating units. The project was initiated on December 25, 1993, and the four turbine units were consecutively put into production on December 1996, November 1997, December 1998 and November 1999.

Yangguang Power Plant is at Pingding County of Yangquan City, 120 km from Taiyuan City. The company is in the core area of Xiyang coal mine region, it mainly depends on locally produced anthracite as fuel, which is transported to the Plant via highway and special railway. Water is supplied through the “Water Elevation Project from Niangziguan to Pingding”. The four turbine units are connected to the power grid through 8-circuit transmission lines. Yangguang Power Plant is presently one of the extra-large combustion power generation plants at million-kWh scale in Shanxi province.

The main equipment in Yangguang Company is as follows. The boilers of Turbine Units 1 and 2 are of Type DG1025/18.2- 7“W” manufactured by Dongfang Boiler Group Co., Ltd. (flame, positive pressure direct blowing, subcritical, one-interval reheat, natural circulation). The boilers of Turbine Unit 3 and 4 are of Type B WB-1025/18.3-M“W” manufactured by Babcock & Wilcox Beijing Company Ltd. (flame, middle-storage, subcritical, one-interval reheat, natural circulation, drum type). The condensing turbines are of Type N300-16.7/537/537-4 manufactured by Dongfang Steam Turbine Plant. The power generators are of Type QFSN300-2-20 manufactured by Dongfang Electrical Machinery Company Limited. The main control system includes the Distributed Control System by Siemens of Germany and the Electro-hydraulic Control System by Bailey Company of USA.

From 2004 to 2007 Yangguang Power Plant invested 365 million RMB to upgrade and renovate the environmental control facilities to reduce air pollutant emissions contributing to the improvement of local and regional environmental quality. The renovation mainly included ash yard leakage proof, dry ash disposal system of Boilers 2~4, installation of wet desulfuration for Boilers 1~4, change of electrostatic precipitators into baghouses for Boilers 3~4, upgrading of control system in electrostatic precipitators of Boilers 1 and 3, renovation of chemical waste water treatment system, and the building of dust suppression and Wind proofing wall in coal yard.

In the first year of the “11th Five-year Planning”, Yangguang Power Company set up the goals of “Yangguang of Harmony, Yangguang of Environment Protection, and Yangguang of Development”. The major actions include the flue gas desulfuration project for all four turbine units. Yangguang Power Company, in pursuit of best economic benefits for the enterprise, actively responds to the calls by the municipal government of “Developing the Chinese ‘Ruhr’ and Constructing Shinning Pearl City in East Shanxi”. The Company has invested 240 million RMB for this flue gas desulfuration project, which is implemented as a major action of “Administration-of-Virtue Project” and for the promotion of the enterprise’s sustainable development.

The desulfuration project was officially started on April 18th, 2006, also as one of the 100 key projects designated by Yangquan Municipality. The desulfuration facility of Turbine Unit 3 smoothly finished its 168-hour test operation on September 11th, 2007 after the successful 168-hour test operations of such facilities of Turbine Units 1, 2 and 4, which marked completion of the flue gas desulfuration project for 4×300MW Turbine Units in Yangguang Power Company, the first 1,200-MW power plant with once-for-all desulfuration renovation for its turbine units in Shanxi province. The flue gas desulfuration facility for turbine units at Yangguang Power Company uses wet limestone-gypsum flue gas desulfuration technology, with is widely found in large turbine units in China. This technology is featured by maturity, low cost, short construction period and reliable operation. During trial period the facility operation was normal, achieving 100% of automatic thermodynamic input rate, 100% of interlock protection device usage, and



100% of gauges application. All the performance indictors are satisfactory and the desulfuration efficiency is more than 90%. The annual SO2 emission reduction is more than 30,000 tons, and the emitted SO2 concentration is within the limits for time-phase-III as defined in “Emission Standard of Air Pollutants for Thermal Power Plants” (GB13223-2003), which effectively improves the local air quality. The operation of this desulfuration project is indeed to play an active role in the mission by Yangquan Municipality of “blue sky, clear water, and green home”.

Yangguang Power Plant is also the first that successfully installed baghouse filters in 300MW turbine units in China, which reduces particulate emission concentration to 18.75mg/Nm3, much lower than the limit for time-phase-III (�50mg/Nm3) as defined in “Emission Standard of Air Pollutants for Thermal Power Plants” (GB13223-2003). The annual particulate emission reduction is close to 8,000 tons.

Yangguang Power Company develops the enterprise culture cored by “harmony, environmental protection, and development”, guides the comprehensive administration from the view of scientific development, takes the obligation of energy conservation, environmental protection, contamination control and pollution reduction, and continuously promotes the renovations in management, administrative mechanism and technology. The company has won the national and provincial awards, including “National First Rate Thermal Power Plant”, “National Civilization Entity”, “National Good Faith in Contract and Credibility Enterprise” “National Model Home of Employees”, “Top 100 Enterprise in Shanxi Province”, “May Day Labor Award of Shanxi Province”, “Patriotism Education Base of Shanxi Province”, “Advanced Entity of Legal Administration in Shanxi Province”, “Advance Entity of Patriotic Health Movement in Shanxi Province”, “Advance Entity of Enterprise Culture Development in Shanxi Province”, “Advanced Primary Party Organization” by Shanxi State-Assets Management Commission, “Model Enterprise of Shanxi Province”, etc. The company makes important contribution to the healthy development of local economy.

2.2 Enterprise Organization For details see the organization chart in Figure 2.2-1.

2.3 Notes on the Auditing Issues 2.3.1 Objectives and Significance of Auditing 2.3.1.1 Objectives:

Through in-situ survey, document review and necessary tests it is to analyze the present situation of environmental protection of the enterprise, to identify its environmental protection level, to discover the problems and shortfalls, to assess and compare potentials for environmental protection, and to propose practical and feasible measures and suggestions for environmental protection. This provides the government with true and reliable information on environmental protection, and offers guidance to the enterprise to elevate its management level in achieving the general goals of environmental protection defined in “11th-five-year planning” for the promotion of sustainable development in both economy and environment. 2.3.1.2 Significance

It is necessarily required in the identification and/or dismissal of enterprise environmental responsibility.

Enterprise environmental responsibility refers to the liability of a firm in environmental

pollution control and ecological and environmental protection. Environmental auditing monitors, assesses and identifies the enterprise environmental responsibilities as defined above, in fair and justice attitude and through unique methods and/or methodology, to ascertain and/or dismiss the liability, and its magnitude and property of the audited enterprise, in order to protect the legitimate right of the enterprise.



It is intrinsically required for continuous operation of an enterprise.

The enterprise activities such as production, business operation and market expansion all requires the enterprise for good environmental image and environmental achievements. Any environmental decision mistake is likely to bring the business management into challenge, causing financial failure, or even bankruptcy and/or liquidation. Therefore it is necessary to attach importance to environment development and actively participate in environmental control and protection, in order for an enterprise to create a good internal and external atmosphere to ensure the sustainable business operation.



Office ofGeneralManager

Dept.Enterprise

Management

Dept. HumanResources

Dept.Accounting

Dept. Partyand Mass

People

Dept.Logistics

Dept.Production& Technol.

Dept. WorkSafety

Supervision

Dept. PowerGeneration

Workshop ofBoiler andTurbine

Workshop ofElectricity

Control

Workshop ofThermalControl

Workshop ofChemistry

Workshop ofCoal

Transport

Workshop ofAuxiliary

Boiler Work

AdministrationParty and Mass

PeopleAdministration

LogisticsManagement

ProductionManagement

ProductionWorkshop

Deputy Chief Engineer ,Deputy Chief Accountant

Administration (General Manager & CCPsecretary , Secretary of Disciplinary

Committee & Chairman of Labor Union

Company Headquarter

ChengguangThermal Power

Company

Material BranchCompany

Hongguang FuelCompany

Directly AdministratedStock Holding Companies

GuangyuanBusinessCompany

Multi-BusinessSystem

PersonnelArchive

Administration

LaborMarket

InternallyRetired

Personnel

Multi-BusinessSystem

Semi-retiredOfficals

Yangguang PowerGeneration Company Ltd .

Shanxi Yangguang PowerGeneration Company Ltd .

Board of Trustees ,Board of Supersion

Figure 2.2-1 Organization Chart of Yangguang Power Plant



It is the important content in enterprise management auditing. Environmental auditing periodically monitors and assesses the enterprise’s activities in

management plan, control procedure and control methodology, in order to analyze the internal environmental factors on management effects and efficiency, to improve control system of environmental management, to facilitate the enterprise to reasonably develop and utilize environmental resources and to practice its social responsibilities. In this view, the environmental auditing, for its systematical assessment of the management system in the enterprise, becomes an important part in enterprise management and auditing.

It is required for the enterprises to explore domestic and international market.

Environmental auditing is good for Chinese enterprises to rapidly enter into international market, also good for foreign capital and projects to settle in Chinese market. It makes its contributions to economic globalization and to the mission of “Only One Home for the Earth”.

2.3.2 Audit Basis 2.3.2.1 Basis of Laws, Regulations and Policies

(1) “Environmental Protection Laws of PRC”, December 1989; (2) “Law on Prevention and Control of Atmospheric Pollution of PRC”, amended in April, 2000; (3) “Implementation Rules of Water Pollution Prevention and Control Law”, amended in March

2000; (4) “Environmental Noise Prevention and Control Law of PRC”, November 1996; (5) “Solid Waste Pollution Prevention Law of PRC, amended in December 2004; (6) “Law of Environmental Impact Assessment of PRC”, October 2002; (7) “Law of Promotion of Cleaner Production of PRC”, June 2002; (8) “Ordinance on Administration for Environmental Protection of Construction Projects”,

issued by the State Council of PRC (NO. 253), November 1998; (9) “Directory of the Administration of Construction Project Environmental Protection”, issued

by the State Environmental Protection Administration (No. 14) in January 2003; (10) “Guiding Catalogue of Industrial Structure Regulation”, issued by National Development

and Reform Commission (2005) (No. 40), December 2005; (11) “Method of Public Participation in Environmental Impact Assessment”, issued by the State

Environmental Protection Administration (No. 28, [2006]) in March 2006; (12) “Notification on Strengthening the Environmental Impact Assessment in the Projects

Financed by International Finance Organizations”, issued by the State Environmental Protection Administration (No. 324, [1993]) on June 21, 1993;

(13) “Notification on the Issuance of Mid- and Long- term Special Planning”, issued by National Development and Reform Commission (No. 2505, [2004]), November 25, 2004;

(14) “Decisions on Implementation of Scientific Development View and Strengthening of Environmental Protection”, issued by the State Council (No. 39, [2005]), in 2005;

(15 “Decisions on Energy Conservation”, issued by issued by the State Council (No. 28, [2006]), August 6, 2006;

(16) “Notification on the Issuance of the Comprehensive Working Plan of Energy Conservation and Pollution Reduction”, issued by the State Council (No. 15, [2007]), May 23, 2007.

2.3.2.2 Relevant Regulations of World Bank

(1) “World Bank OP/BP4.01 and Annexes (Environmental Assessment)”, January 1999; (2) “World Bank OP/ (Environmental Assessment), January 1999; (3) “World Bank GP4.01 (Environmental Assessment), January 1999; (4) “World Bank OP/BP4.04 (Natural Habitats), September 1995; (5)“World Bank GP4.07 (Water Resources Management), December 2000; (6) “World Bank GP14.70 (non-governmental organization participation in the funding of World

Bank)”.



2.3.3 Auditing Scope and Period This auditing covers all areas of Yangguang Power Plant, and the auditing period is from

2004 to 2007. 2.3.4 Implementation Criteria 2.3.4.1 Criteria for Environmental Quality

(1) Criteria for Air Quality: This project is in mixed rural and ordinary industrial area, where

belongs to category-II based on air quality functional area classification, subject to the Standard-II as defined in “Ambient Air Quality Standard” (GB3095-1996). The standard limits are presented in Table 2.3-1.

Table 2.3-1. Concentration Limits of Ambient Air Quality Standard (mg/m3)Pollutants TSP SO2 NO2 PM10

Annual Average 0.20 0.06 0.08 0.10 Daily Average 0.30 0.15 0.12 0.15

Hourly Average — 0.50 0.24 —

(2) Surface water: The surface water system at this project is Nanchuang River, belonging to Ziya River of Haihe River watershed. The surface water is subject to Standard-IV as defined in “Surface Water Quality Standard (GB3838-2002). The standard limits are presented in Table 2.3-2.

Table 2.3-2. Limits of Surface Water Quality Standard (mg/L)

Pollutant pH Ammonia-Nitrogen

CODCr BOD5Volatile Phenol

Standard 6 9 1.5 30 6 0.01 Pollutant cyanides Fluorides Sulfides Oils Standard 0.2 1.5 0.5 0.5

Note: pH: no unit. (3) Ground Water: The drinking water of the local residents is from ground water. According

to ground water category criteria defined in “Ground Water Quality Standard” (GB/T14848-93), the Category-III water is “based on human health baselines, mainly as water source for mass consumption and for industrial and agricultural usage”. Therefore, the ground water in the assessed area is identified as Category-III, subject to the standard to this category as defined in “Ground Water Quality Standard” (GB/T14848-93). The standard limits are presented in Table 2.3-3.

Table 2.3-2. Limits of Ground Water Quality Standard (mg/L)

Item pH Total hardness

(CaCO3)sulfates Fluorides

Total number of E.coli (number/L)

Item 6.5 8.5 �450 �250 �1.0 �3.0

Standard Ammonia-Nitrogen

Nitrate Nitrite Cr6 Total number of Bacteria (number/L)

Item �0.2 �20 �0.02 �0.05 �100

(4) Environmental Noise: The noise environment is subject to Category-II Standards as defined in “Standard of Environmental Noise of Urban Area” (GB3096-93). The criteria are in Table 2.3-4.



Table 2.3-4. Criteria for Environmental Noise Standard (dB(A))

Category Day time Night time

Category-II 60 50

2.3.4.2 Criteria for Pollutant Discharge

(1) Criteria for Air Pollution Emission In accordance with the requirements made by Shanxi Environmental Protection Bureau in

reply to the EIA of the desulfuration project in Yangguang Power Plant, prior to that project, the air pollutant emission is subject to the upper concentration limit for coal-combustion boilers for time phase-I as defined in “Emission Standard of Air Pollutants for Thermal Power Plants” (GB13223-2003); after project completion, the emission is subject to the upper concentration limit for time phase-III. The standards are listed in Table 2.3-5.

Table 2.3-5 Emission Standards of Air Pollutants for Thermal Power Plants

Type of Boilers Pollutant Upper concentration limit for

time phase-I mg/m3upper concentration limit for

time phase-III mg/m3

Smog 600 50 SO2 2100 400

Coal- Combustion

Boiler NOX 1500 — Note: Vdaf 10%.

(2) Criteria for Wastewater Discharge The wastewater discharge is subject to the Category-I standard as described in Table 4 of

“Integrated Wastewater Discharge Standard” (GB8978-1996). The details are shown in Table 2.3-6.

Table 2.3-6 .Integrated Wastewater Discharge Standard Pollutant Standard Pollutant Standard Pollutant Standard

pH 6 9 Oil 5 CODCr 100 Suspended particulates

70 Fluorides 10

(3) Criteria for Noise Within the western, southern and eastern boundary of the Power Plant the noise is subject to

Category-II standard as defined in “Noise Standard within Boundary of Industrial Site” (GB12348-90); and at the northern boundary the noise is subject to Category-IV standard of GB12348-90. The standard limits are shown in Table 2.3-7.

Table 2.3-7. Noise Standard within Boundary of Industrial Site Standard (dB(A))

Category Day time Night time

Category II 60 50 Category IV 70 55

(4) Criteria for Solid Waste Storage



Solid waste disposal is subject to “Standard for Pollution Control in Storage and Disposal Site for Common Industrial Solid Wastes” (GB18599-2001) 3 Overview of the Present Engineering at Shanxi Yangguang Power Plant 3.1 Geographical Location

Yangguang Power Plant is at Pingding County of Yangquan City, Shanxi province. It is

~15km to Yangquan City, and ~4km to Pingding Township. The Power Plant is in an open area, north to Nanchuang River and next to Nan’ao Village. At the east of the Power Plant is Yang-She Railway that connects to Shi-Tai Railway, and at the north is the special railway of the Yangquan Fifth Coal Mine that connects to Yang-She Railway in Pingding. The Yang-Xi Road is at the east of the Power Plant and Shi-Tai Highway is at the north, where transportation is extremely convenient. Yangpogou Ash Yard, 7 km east to the Power Plant, serves as the wet ash yard. The slag yard is at the No. 3 ditch at the south. Figure 3.1-1 shows the geographic location of the power plant, the ash yard and the slag yard.

3.2 Overview of the Engineering Yangguang Power Plant operates coal-combustion vapor condensing turbine power

generating units with total capacity of 4×300MW, the total boiler evaporation capacity is 4,100t/h. The power plant planning was started in 1984, the construction was started in December 1993, and the four power generating units were consecutively put into production by November 27, 1999. Two smoke stacks are each shared by Boilers 1 and 2, and Boilers 3 and 4. Each stack is 240m in height with outlet diameter of 8m.

Limestone-gypsum desulfuration is used for the four power generating units, and the flue gas

desulfuration rate is 90%. Boilers 1 and 3 are equipped with electrostatic preceptors with the dust removal efficiency of 99%, and Boilers 2 and 4 are equipped with baghouses with dust removal efficiency of 99.9%. The ash is hydraulically driven as highly dust-concentrated water to Yangpogou Ash Yard via primary and secondary ash slag pumps. In 2005~2006 the dry ash removal system was installed to Boiler 2, 3 and 4 for comprehensive coal ash utilization. The slag is transported via trucks to slag yard for storage.

Table 3.2-1 presents the main environmental protection facilities in Yangguang Power Plant.

3.3 Land Occupation

Table 3.3-1 presents the land occupation by Yangguang Power Plant.

Table 3.3-1 Land occupation by Yangguang Power Plant. Name Area (ha)

Plant Area 39.07

Coal Yard 1.58

Ash Yard 43

Slag Yard 2.2



Figure 3.1-1 The geographic location of the power plant, the ash yard and the slag yard.

N

Slagyard

AshYard

YangguangPower plant



Table 3.2-1 Overview of the Main Environmental Protection Facilities and Equipment

Item Unit No. 1 No. 2 No. 3 No. 4

Output MW 300 300 300 300 Output and Starting

operation date Time Annually one unit was put into production from

December 1996 to November 1999.

Type

Type DG1025/18.2-II“W”: flame, positive pressure direct blowing, subcritical, one-interval reheat, natural circulation

Type B&WB-1025/18.3 M“W”: flame, middle-storage, subcritical, one-interval reheat, natural circulation, drum type

Boiler

Evaporation t/h 1025 1025 1025 1025 Type N300-16.7/537/537-4

Category Subcritical, single shaft and double casings, double flow, one-interval intermediate reheat condensing turbine

Turbine

Output MW 300 300 300 300 Type Type QFSN-300-2-20

Cooling Mode

Water hydrogen hydrogen Power Generator

Capacity MW 300 300 300 300 Category Limestone gypsum wet desulfuration Desulfur

ation Desulfuration efficiency

% 90

Category

Electrostatic Precipitator

(two chamber and four electrical

fields)

Baghouse filter

Electrostatic Precipitator

(two chamber and four electrical

fields)

Baghouse filter Dust

removal

Removal Efficiency

% 99.0 99.9 99.0 99.9

No. 1# 2# Type Ferroconcrete structure Ferroconcrete structure

Height m 240 240

Flue Gas Treat-ment

Smoke Stake

Outlet inner diameter

m 8 8

Type Natural Draft Cooling Tower Cooling Mode

Cooling area m3 4500 4500 4500 4500

Wastewater production

After treatment through industrial wastewater treatment station, it is reused in coal transport system, coal yard spray or supplemented to ash flushing system

Domestic wastewater

After secondary biochemical treatment it is supplemented to ash flushing system

Wastewater Treatment

Ash water Discharged after setting for clarification in vertical wall

Coal ash Discharged into ash yard via hydraulic transport of highly dust-concentrated water or removed as dry ash for comprehensive utilization Slag Disposal

Slag Transported by trucks to slag yard or for comprehensiveutilization.



3.4 Power Plant Planar Setup The Power Plant consecutively distributes from south to north the in-house 220kV power

distribution faculty, natural draft cooling towers, main workshops, railway and coal yard. The in-house 220kV power distribution faculty is on the highland at the most southern part of the power plant and power lines are to the south (sic). The power plant planar setup is shown in the figure 3.4-1.



Figure 3.4-1. Map of Power Plant Planar Setup

1

23

4

5

6

7 8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30 31 32

33

34

Table of BuildingsNo Name No Name No Name1 Turbine house 12 In house 220kv

power distributionfacility

23 Hydrogengeneration station

2 Deoxygenatinghouse

13 Natural shaft coolingtower

24 Office building

3 Coal bunker 14 Signal tower 25 Communicationbuilding

4 Boiler house 15 Underground bridgeand truck dischargeditch

26 Open oil storage

5 Precipitators 16 Coal yard 27 Dinning hall6 Wind-blower

house17 Coal transport

building28 Single resident

building7 Flue channel 18 Ash pumps house 29 Shelter storage8 Chimney 19 Fuel tanks 30 Material warehouse9 Boiler

imitation house20 Acid and base

storage31 Coal dozer house

10 Central controlbuilding

21 Chemical watertreatment house

32 Wastewatertreatment plant

11 Transformers 22 Air compressorhouse

33 Coal HandlingGallery

34 Desulfuration tower



3.5 Energy and Raw Materials 3.5.1 Consumption of Main Energy and Raw Materials by the Power Plant

The Consumption of main energy and raw materials by Yangguang Power Plant from 2004 to 2006 is presented in Table 3.5-1. The properties of the main energy and raw materials are in Table 3.5-2.

Table 3.5-1. Summary of Consumption of Main Energy and Raw Materials in 2004~2006

Annual Consumption Main and auxiliary materials and energy

2004 2005 2006

Coal 10,000 tons/yr. 383.6 376.6 371.4 Water 10,000 tons/yr. 2408 2339 2353 Electricity 10,000 kWh 41529 40377 43054 Diesel ton/yr. 2140 2032 1712 Hydrochloric Acid ton/yr. 2052.14 1869.42 1864.7 Basic Solution ton/yr. 1604.1 1418.28 1995.29 Hydrazine ton/yr. 10 5.7 7 Sulfuric Acid ton/yr. 2402.91 2388.66 2381.24

3.5.2 Fuel Coal The fuel coal is supplied by Yangquan Fifth Coal Mine and other local coal mines of

Pingding County. The coal from Yangquan Fifth Coal Mine is all transported via railway, and the that from local coal mines are transported by trucks that enter into the site from the east side of Power Plant.

The properties of fuel anthracite used in Yangguang Power Plant in 2005~2006 are: sulfur

content: 0.68~1.8%; and ash content: 18.75~45.02%. The average parameters are in Table 3.5-3.

Table 3.5-3. Coal Assay in 2005~2006 Item Symbol Unit Value

Moisture content on as-fired basis Mt % 9.6 Ash content on as-fired basis Aar % 30.24 Volatile matter as dried basis Vdaf % 7.5

Carbon content as-received basis Car % 59.12 Sulfur content as-received basis St,ar % 1.66

Hydrogen content as-received basis Har % 2.39 Nitrogen content as-received basis Nar % 0.86 Oxygen content as-received basis Oar % 3.47 Calorific Value as-received basis Qnet.ar kJ/kg 22180



Table 3.5-2 Properties of the Main Energy and Raw Materials Used in Yangguang Power PlantItem MaterialName Coal Limestone Diesel Water HCl Basic Solution Hydrazine H2SO4

Function Of TheMaterial

Provide HeatFlue Gas

DesulfurationFire Ignition Heat Medium

Desalt And PhAdjustment

Desalt DeoxygenatingResin

RegenerationHarmful ContentAnd Property

Sulfur NoneFlammable And

ExplosiveNone Acid Base N2H4.H2O Acid

Active Content AndProperty

Gaseous Solid Liquid Liquid Liquid Liquid Liquid Liquid

Concentration OfHarmful Content

1.66% — — — 31% 40% 40% 98%

Unit Price (RMB) 350 50 500 3 650 900 30000 780Means OfTransportation

Train, Truck Truck Train Pipe Tanker Tanker Truck Tanker

Storage Coal YardLimestone

BinOil Tank Water Pool Acid Tank Base Tank Barrel Acid Tank

Storage Quantity 150,000 — 1800 — 80 80 1 120Transporting WithinThe Power Plant

Conveyer Conveyer Pipe Pipe Pipe Pipe Pipe Pipe



3.5.3 Limestone The Power Plant uses limestone-gypsum wet desulfuration method for all the four power

turbine units. The total annual consumption of limestone as desulfurating agent is 180,000 tons, provided from Huiming Stone Plant in Beichanshi of Pingding County, and Yuxin Stone Plant of Pingding County. 3.5.4 Water Consumption

The water supplementation is provided by “Water Elevation Project from Niangziguang to

Pingding”. The freshwater usage is 3092m3/h, see Table 3.5-4. The water balance is demonstrated in Figure 3.5-1.

Table 3.5-4. Water Usage in the Power Plant

Water Source Usage Unit Water amount

for recirculation Freshwater supplement

Cooling Water 74000 1579 Boiler Water Supplement

194

Industrial Water Use

m3/h

1303

Ground Water

Domestic Water Use m3/h 16 Total m3/h 74000 3092

Cooling towerCirculation water

74000

Circulation Water

Water for chemical treatment

Water source

Water recovery pool

Neutralization pool

Evaporation loss

Ash flushing pool

3092

15791036

1303

194112

82

16

38

13

6203

79

1

Desulfuration system

268

298

1005Water for

industrial use

Industrial Wastewater Treatment Plant

288

20

235

Coal transport system, coal yard spray

20

Ash Yard

Wastewater discharge 543

Boiler refill

Water for domestic use

Biochemical Treatment

Watering plants or

street spray 4loss

Figure 3.5-1. Water Balance in the Power Plant

The wastewater from industrial production and domestic sewage from Power Plant separately enters into each treatment system in wastewater treatment plant. The treated water is reused in coal transport, coal yard spray and ash flushing, etc. The water from ash yard is discharged into Nanchuan River.

3.6 Ash and Slag Disposal and Overview of Ash Yard In Yangguang Power Plant the ash from all four turbine units were originally removed using

hydraulic method, through two-stage wet slag pumps sent to Yangpogou ash yard around 7 km



away to the east. In 2005~2006 dry ash removal system were added to Turbine Unit 2,3 and 4 for coal ash comprehensive utilization. Boiler slag falls into the water-sealed slag holder at bottom, then crushed and elevated to dewatering bin by hydraulic injector. The dewatered slag is transported by trucks to the slag yard in No. 3 Ditch at the south of the Power Plant. The slag production in 2004~2006 is presented in Table 3.6-1, and the locations of ash yard and slag yard are in Figure 3.1-1.

Table 3.6-1. Slag Production at Power Plant in 2004~2006 Annual

Production Year

Dust captured in precipitators (10,000 tons/a)

Boiler slag production (10,000 tons/a)

2004 98.7 11.3

2005 97.9 11.2

2006 96.2 11.8

3.7 Process Flow and Polluting Points Yangguang Power Plant used pulverized coal-fired boilers for power production. The process

flow is as follows. The pulverized fuel and hot air is transported into boiler for combustion to convert its chemical energy into heat energy. The pretreated water is vaporized into steam of high temperature and high pressure, which expands in turbine to do work to convert heat energy into mechanical energy. The turbine then drives power generators to convert mechanical energy into electric energy for power produce. Figure 3.7-1 is the process flowchart of the Power Plant.

The whole process flow is generally divided into: fuel transport system, combustion system, ash and slag removal system, chemical water treatment system, water supply and drainage system, thermal system, electric system, and flue gas precipitation, desulfuration & cooling system. The major pollutants are waste gases, wastewater, slag and noise. The pollution control measures are presented in Chapter 3. Figure 3.7-2 presents the polluting points. �



Reuse

Wastewater

Coalsedimentation

pond

Wastewater

Coal yard

Coal

steam

UserPowergrid Power

generator

Turbine

Condenser

CoolingTower

Condensedwater pump

WaterSource

Facility forChemical water

treatment

Facility forcondensed water

treatmentDeoxygenater

Water pump High PressureHeater

Central treatment system

Oil-containingwastewater

Recovery andreutilization Domestic

sewage SecondaryBiochemicalTreatment

reuse

Slag yard

Ash yard

Ash storageHouse

Comprehensiveutlization

Coalfeeder

Coalcrusher

Boiler Boiler

Slag Ash

Ash

Dustprecipitator

Wind blower

Wind blowerfor

desulfuration

Limestonepowder

Desulfurationfacility

gypsum

Smog

SmokeStack

Figure 3.7-1 Process Flow Chart of the Power Plant



Coal yard

Comprehensive utlization

Gypsum from desulturation

Desulturationtower

DesulturationWaste water

Coal ash

Ash yard

Comprehensive utlization

Boiler

Precipitator

Boiler washing

Waste water from

washing

Coal crusher

Power generatorTurbine Power

cable

Water condenserWater

treatment

Acid, basic water water

Doemstic sewage from Power Plant Area

desalting

Waste discharge

Ash and slag

Waste gas source

Wastewater source

Solid waste source Noise source

Figure 3.7-2 Diagram of Pollution Sources in the Power Plant �



4 Main Pollutants Emissions and Control Measures in the Power Plant 4.1 Air Pollutant Emissions and Control Measures 4.1.1 Boiler Flue Gas

Control Measures against Boiler Flue Gas Prior to the desulfuration renovation of the Power Plant, Boilers 1~4 are equipped with

electrostatic precipitators and the dust removal efficiency is 99%. In 2006 baghouse filters replaced the electrostatic preceptors in Boilers 2 and 4 and dust removal efficiency is increased to 99.9%. Meanwhile upgrading was made to the control systems of the electrostatic precipitators in Boilers 1 and 3.

Prior to the desulfuration renovation of the Power Plant no sulfur removal devices were

available for all four boilers, resulting large SO2 emissions. In order to reduce SO2 emissions to satisfy environmental protection requirements and improve local environmental quality, in 2006 the Power Plant installed desulfuration facilities using limestone-gypsum wet desulfuration technique, the desulfuration efficiency is 90%. The desulfuration process diagram is shown in Figure 4.1-1.

Electrostaticprecipitator

boilerWind blower

Smoke stack

Limestone crushing

Limestone

Limestone supply facility

Dewatering machine

gypsum

Gypsum recover system

Absorption, oxidation system

Desulfuration, water discharge

Absorption tower

Air

Principle SO2 Absorption, oxidation, and gypsum recovery

Gyp-sum

Lime-stone

Figure 4.1-1. Diagram of limestone-gypsum wet desulfuration process

Two smoke stacks are each shared by Boilers 1 and 2, and Boilers 3 and 4. Each stack is

240m in height with outlet diameter of 8m.

Eight sets of continuous monitoring devices are installed at the inlet and outlet of flue gas pipes. The four sets for Boilers 1 and 2 are of Type EL3020 manufactured by Shanxi Jingtian Environment Company; and the four sets for Boilers 3 and 4 are of Type EL3020 manufactured by Beijing Zhongdianxinye Technology Development Company.

Environmental Auditing Reportdocuments.worldbank.org/curated/en/193861468019145908/pdf/E17… ·...

Documents

Transcript of Environmental Auditing Reportdocuments.worldbank.org/curated/en/193861468019145908/pdf/E17… ·...