SHANDONG POWER SECTOR FLUE GAS DESULFURIZATION (FGD) PROJECT
Xintai Inferior Coal Comprehensive Utilization
Pit Mouth Power Plan
October, 2006
Table of Content
I. Introduction and Background......
II. Project Description......
III. Environmental Management Plan
IV. Monitoring Plan......
V. Organization......
VI. Public Participation......
I. Introduction and Background
According to the guidelines of Shandong Province Development and Reform Commission (SPDRC) and Shandong Province Environmental Protection Bureau (SDEPB), Xintai inferior coal comprehensive utilization pit mouth power plant applied World Bank loan for flue gas desulphurization (FGD) project in 2004, which consists of three parts: Xintai inferior coal comprehensive utilization pit mouth power plant, Liangda coal slime power plant and Taishan Yangguang power plant.
1.1Xintai Inferior Coal Comprehensive Utilization Pit Mouth Power Plant
The project of 2 sets of 480 t/h circulating fluidized bed (CFB) ultrahigh boilers with 2 units 150MW gas traps and 2 sets of electrostatic precipitators costs 136.23 million RMB totally, invested by Xinwen Mine Group Co., Ltd, Wennan Mine Group and Yantai HONGYUAN Power Industry Co. Ltd. The proposed project will be located in WennanTown, Xintai City, Shandong Province and cover area of 168,300 M3. The location is near Beijing-Shanghai Expressway, 2.8 km away from XintaiCity and 80 km away from TaianCity. WennanTown is situated in the middle of Shandong province. The topographic feature of this area is I terrace of low hills.
Boiler construction has not yet started. An EIA was prepared which included the FGD unit. The EIA was approved by SEPA in April 2005. A public consultation for the EIA was conducted in January 2005 and the EIA report was disclosed in July 2005.
The project will consist of a single lime/limestone wet scrubber that will treat the flue gases from both boilers.
1.2 Liangda Coal Slime Power Plant
The project proposes to construct a single FGD unit for 3 existing75 t/h circulating fluidized bed (CFB) boilers. Although the FGD unit will nominally treat the flue gases from all three boilers, in fact, only two boilers are operated at any given time. The third boiler is a standby unit. The boilers currently supply heat and power to local residents. The investment of this sub-project is 77.51 million RMB, which is from payment for goods and self-finance of Xinwen Mine Group. This project is located in the west of Liangzhuang Coal Mine, 13 Km away from Xintai Government in the direction of northeast and 3 Km away from Xinwen Office in the direction of southeast. The special railway of Liangzhuang Coal Mine merges with Cilai Railway in Xinwen station 1.5 Km away from Liangzhuang Coal Mine, the transportation is quite convenient.
The Liangzhuang Coal Mine covers an area of 14.5 Km2, till the end of 2000 the storage amount of raw coal reached 62.704 million tons, and the amount of coal available is 33.966 million tons which can be used for 28 years if the annual yield could reach to 1.2 million ton. There are also by-products of 144,000 t/a coal slime used as fuel for the power plant and 200,000t/a gangue sold to Liangzhuang brick factory belongs to Liangzhuang Mining Group to produce rock brick.
An EIA was prepared for all three boilers and approved by SPEPB in November 2001, and a public consultation was conducted in August 2001. Construction start dates for the three boilers were January 2002 (Boilers #1 and 2) and February 2005 (Boiler #3). The EIA included the FGD as part of the overall project.
The selected FGD technology is a semi-dry limestone system.
1.3 Taishan Yangguang Power Plant
Yangguang Power Plant is reformed from HULIN Power Plant started in 1989. There is a 35t/h circulating fluidized bed boiler with 1*6 MW units. In 2003 the 2nd phase gangue generation project of 130t/h boiler with 24MW unit was built in the plant. The objective of this project is to utilize fuel of lower heating value, such as gangue to reuse the waste to decrease environmental pollution and increase the economic, environmental and social benefits. This project also plays important role in protecting ecological environment. The plant is located in LaiwuCity and the transportation is convenient.
The proposed project will retrofit the 130 TPH boiler with a semi-dry limestone system. An EIA for the boiler was approved by SPEPB in August 2003 and construction started also in August 2003. The boiler was in operation by the end of December 2003. The EIA included the FGD as part of the overall project.
II. Project Description
2.1Xintai Inferior Coal Comprehensive Utilization Pit Mouth Power Plant
2.1.1Natural conditions
The raw coal exploited from Wennan Coal Mine of Xinwen Mine Group is inferior coal of lower-calorific value and the annual production is more than 1 million tons, among which the ash and gang content is much higher in the coal at No 13 and No. 15 coal seam. As the high S content and lower-calorific value of the fuel, the company proposes to launch a comprehensive utilization project to reduce environmental pollution and increase economic benefits.
2.1.2Environmental protection objects and measures
The boiler project environmental protection objects near the project location are Shangtaiyu village and Leiwang village as well the rivers in this area, such as SongRiver and ChaiwenRiver. The project could have adverse impacts on superficial underground water from temporary ash disposal. However ash will be disposed in a concrete lined disposal area that will be covered to protect from rainfall thatwill minimizeunderground and surface water pollution from leaching and runoff respectively.
According to the guidelines of “New/expanded coal-fired power plant should be constructed with flue gas desulphurization facilities” [No.(2004)86] issued by State Development and Reform Committee, the plant planned to introduce two-stage desulphurization process---putting limestone into boilers and wet limestone out of boilers---to reduce the flue gas discharged. This technology has advantages in making sufficient contact of liquor and steam, the SO2 removal efficiency can reach to 92%. The flue gas can meet III time-frame of <Discharging Standard forCoal-fired Power Plant> (GB13223-2003).The standard is as follows:
Item / Pollutant / Max. Permissible discharge ConcentrationsValue / Unit / Time frame
Air / SO2 / 800 / mg/m3 / Ⅲ
Dust / 200 / mg/m3 / Ⅲ
As the proposed project is an important attached project of power plant construction, it has little impact on ambient environmental quality, as well as CHAIWENRiver water quality and local environmental protection objects.
2.2Liangda Coal Slime Power Plant
2.2.1Natural conditions
The plant is established in 2003, with 2*15 MW units and 3*75t/h circulating fluidized bed boilers. Liangda Power Plant lies in alluvial plain; the land elevation is around 168.20m. As the plant is in Xinwen Coalfield exploitation area, the waste sources are so many as to cause high concentration of SO2 and TSP. In order to reduce the pollution and increase the economic benefits, sufficient utilization of coal slime and mine water is required.
2.2.2Environmental protection objects and measures
The environmental protection objects in this area refer to residents and villages near the plant of 5Km in diameter; the surface water refers to ChaiwenRiver.
The flue gas caused by coal firing from thermoelectric boilers is the main waste source. According to the flue gas discharging standard of 200mg/Nm3, to achieve the dust removal targets, triple-field electrostatic precipitator with 120m-high chimney is chosen for dust removal. Accordingly,the circulating fluidized bed (CFB) technology is chosen for desulphurization with adding limestone into the boilers, the SO2 removal efficiency can reach to 60% or above, which meets the Class-III of <Discharging Standard for Coal-fired Power Plan> (GB13223-2003).The standard is as follows:
Item / Pollutant / Max. Permissible discharge ConcentrationsValue / Unit / Time frame
Air / SO2 / 800 / mg/m3 / Ⅲ
Dust / 200 / mg/m3 / Ⅲ
2.3Laiwu Taishan YANGGUANG Power Plant
2.3.1 Natural conditions
The ambient air pollution around the project location is heavy, especially the coal powder emission when winding. The SO2 monitoring result is good and TSP and PM10daily concentration is close to the standard value. As the power plant has been established for years, most of the FGD equipments under operation are too old to remove the SO2efficiently. The triple-field electrostatic precipitator is substitute for water film dust catcher, which can increase the SO2 removal efficiency to 99.3%. Besides, the boiler residue also has adverse impacts on environment. The first-phase of the project has totally installed 6,000KW units and 1X35t/h boiler, which supplies power through public grid. The second-phase of the project was stared in 2003 and has totally installed 1×24MW unit with 1×130 t/h CFB.
2.3.2 Environmental protection objects and measures
The environmental protection objects near the project location refer to the local villages, superficial underground water resources and ChaiwenRiver.
The main waste source is flue gas. According to the <Discharging Standard for Coal-fired Power Plant> (GB13223-1996) Class-III standard, the max concentration of SO2 and dust is respectively 1200mg/Nm3 and 500mg/Nm3.
Taishan Yangguang Power Plant proposes to introduce NID (Novel Integrated Desulfurization, an Alstrom proprietary process) dry FGD facilities based on current circulatingfluidized bed in-furnace FGD. Considering the technical and economic factors, quaternary-field electrostatic precipitator technology is more available for the project and its real removal efficiency can reach to 99.8%, decreasing the discharging amount of dust and SO2. According to the standard GB 13223-2003, a fixed instant monitoring system will be installed on the boiler.
III Environmental Management Plan
3.1 Xintai Inferior Coal Comprehensive Utilization Pit Mouth Power Plant
The power plant set up a special team responsible for environmental protection:
1. Helping to carry out the state environmental protection laws and regulations;
2. Elaborating the environmental protection plan and helping to carry out; propagandizing concepts of environmental management and cleaner production;
3. Inspecting the equipments and keeping routine maintenance;
4. Recording and filing the reports of whole plant and dust heap;
5. Helping to finish monitoring work;
6. Inspecting the operation of FGD facilities.
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Xinwen Pit Mouth Power Plant Environmental Management (Mitigation) Plan
Stage / Item / Issue / Mitigating measures / Cost / Responsibility / Start date / End dateConstruction / Water / The wastewater volume during this phase is no so much and discharged at intervals, which has slight impact on \the ambient environment. / The domestic wastewater will flow into the existing wastewater treatment plant to be recycled for road spraying or vegetation recovering. / Small / Wennan Mine Environmental Protection Unit / When construction starts / When construction finishes
Solid waste / Construction waste of digging earth and other wastes. / The solid waste can be used for filling the bottomland, which will be covered with 0.5m farming earth for re-farming preparation. / Small / Contractor / When construction starts / When construction finishes
Noise / The noise caused by operating construction equipment / Selecting the equipments with low noise, <85 dB[A], and the construction time would be limited to 7:00 AM-9:00 PM. / Small / Contractor / When construction starts / When construction finishes
Air / Dust / Water construction sites, particularly during dry windy weather / Small / Contractor / When construction starts / When construction finishes
Operation / Water / Circulating water in FGD system / The waste water will be reused in the system without discharging outside. / Small / Pit mouth power plant, Operations Unit / Boiler Startup / Ongoing
Solid waste / The solid waste is desulphurization gypsum---CaSO4·2H2O (chemical outcome of SO2 and CaCO3) / The gypsum will be sold to Xinwen Mining Group Ltd who will use it to make wallboard.. / Small / Pit mouth power plant, Operations Unit / Boiler Startup / Ongoing
Noise / The noised is caused by CaCO3 crushing machine, wet grinder, oxidation blower, DIN blower and air compressor. / Following <Standard of noise at boundary of industrial enterprises（GB12348-90）time-frame II: Max. Permissible noise level is 60dB (A) during daytime and 50dB (A) in nights. Design gas line and water pipeline with no sharp bends, planting shrubbery and arbor around the workshop for sound absorption, the noise level of main noise source can reduce by 15~20dB(A). Bid contracts will specify the following maximum noise limits for equipment:
- Limestone crusher <80 dB[A]
- Wet grinder <82 dB[A]
- Oxidation blower <82 dB[A]
- DIN blower and air compressor <80 dB[A]
Dust / Limestone dust from transport and storage /
Cover trucks and storage areas and/or spray with water
/ Small / Pit mouth power plant, Operations Unit / Boiler Startup / Ongoing1
3.2 Liangda Coal Slime Power Plant
The environmental protection of Liangda Coal Slime Power Plant is taken over by Liangzhuang Coal Mine environmental protection office, the work scope covers:
1. Helping to carry out the environmental protection laws and regulations;
2. Elaborating the environmental protection plan and helping to carry out;
3. Propagandizing environmental management concepts, knowledge and new technologies;
4. Inspecting the equipments and keeping routine maintenance;
5. Recording and filing the documents of pollution situation;
6. Making monitoring plan and coordinating to carry out;
7. Inspecting the operation of FGD facilities
1
Liangda Coal Slime Power Plant Environmental Management (Mitigation) Plan
Stage / Item / Issue / Mitigating measures / Cost / Responsibility / Start date / End dateConstruction / Water / The wastewater volume during this phase is no so much and discharged at intervals, which has slight impact on \the ambient environment. / The domestic water will be discharged to the Xinwen wastewater treatment plant.. / Minor / Contractor / When construction starts / When construction finishes
Solid waste / Construction waste of demolishing building, digging earth and other wastes. / The solid waste can be collected for filling the mine pits / Minor / Contractor / When construction starts / When construction finishes
Noise / The noise caused by grab, bulldozer, road-roller, blender and crane etc / Selecting the equipments with low noise, <85 dB[A], and the construction time would be limited to 7:00 AM-9:00 PM. / Minor / Contractor / When construction starts / When construction finishes
Air / Dust / Water construction sites, particularly during dry windy weather / Minor / Contractor / When construction starts / When construction finishes
Operation / Water / Wastewater from chemical treatment, circulating wastewater, and domestic wastewater and some industrial water / The chemical wastewater will be recycled after neutralization; the domestic water will be discharged into the existing Xinwen wastewater treatment plant. / Minor / Liangda Coal Slime Power Plant Production and Technology Department / Boiler Startup / Ongoing
Solid waste / CaSO4·2H2O waste disposal / Only a temporary dust heap is set in the power plant, all the residue is sold to new-build cement enterprise belongs to Xinwen Mining Group. / Minor / Liangda Coal Slime Power Plan Production and Technology Department / Boiler Startup / Ongoing
Dust / Limestone dust from transport and storage /
Cover trucks and storage areas and/or spray with water
/ Minor / Liangda Coal Slime Power Plan Production and Technology Department / Boiler Startup / OngoingNoise / Air driver noise, mechanical noise and electromagnetic noise caused by blowers, engineers and steam turbine is the source. / Taking measures for sound absorption and shock proof etc, design gas line and water pipelines with minimum bends and no sharp corners, planting shrubbery and arbor around the workshop for sound absorption, the noise level of main noise source can reduce by 10~20dB(A), meeting to the time-frame II of <standard of environmental noise of urban area (GB3096-93): 70 dB (A) in the day, 55 dB (A) in the night. / Minor / Liangda Coal Slime Power Plan Production and Technology Department / Boiler Startup / Ongoing
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3.3Laiwu Taishan YANGGUANG Power Plant
The production division is responsible for the environmental management to carry out the following work:
1. Helping to implement the environmental protection laws and regulations;
2. Elaborating the environmental protection plan and helping to carry out;
3. Propagandizing environmental management concepts, knowledge and new technologies;
4. Inspecting the equipments and keeping routine maintenance;
5. Recording and filing the documents of pollution status;
6. Coordinating to finish monitoring work;
7. Taking charge of FGD facilities maintenance.
1
Taishan YangGuang Power Plant Environmental Management (Mitigation) Plan
Stage / Item / Issue / Mitigating measures / Cost / Responsibility / Start date / End dateConstruction / Water / The wastewater volume during this phase is very small and discharged at intervals, which has slight impact on \the ambient environment. / The domestic wastewater will flow into diversion ditches surrounding the plant for runoff control / Minor / Contractor / When construction starts / When construction finishes
Solid waste / Earth dug out and other construction waste. / The solid waste can be collected for filling the mine pits / Minor / Contractor / When construction starts / When construction finishes
Noise / The noise caused by construction equipment / Selecting the equipments with low noise, <85 dB[A], and the construction time would be limited to 7:00 AM-9:00 PM. / Minor / Contractor / When construction starts / When construction finishes
Air / Dust / Water construction sites, particularly during dry windy weather / Minor / Contractor / When construction starts / When
construction finishes
Operation / Solid waste / Solid waste is CaSO4·2H2O. / The waste residue will be reused by YangGuang construction material plant / YangGuang Power Plant, Production Technology Department / Boiler Startup / Ongoing
Noise / The noise is primarily from the ID fan and by CaCO3 crushing machine, wet grinder, oxidation blower, DIN blower and air compressor / Following <Standard of noise at boundary of industrial enterprises（GB12348-90）time-frame II: Max. Permissible noise level is 60dB (A) during daytime and 50dB (A) in nights. Design gas line and water pipeline with no sharp bends, planting shrubbery and arbor around the workshop for sound absorption, the noise level of main noise source can reduce by 15~20dB(A). Bid contracts will specify the following maximum noise limits for equipment:
- ID Fan <85 dB[A]
- Limestone crusher <80 dB[A]
- Wet grinder <82 dB[A]
- Oxidation blower <82 dB[A]
- DIN blower and air compressor <80 dB[A]
Dust / Limestone dust from transport and storage /
Cover trucks and storage areas and/or spray with water
/ YangGuang Power Plant Production Technology Department / Boiler Startup / Ongoing1