Modern environmental protection technology
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Vinh Tan 4 Thermal Power Plant – a Branch of Vietnam Electricity:
Capacity: 1,800MW (including 3 units x 600MW).
Location: Vinh Tan Electricity Center (Binh Thuan province).
As a national key project, in the Government's Power Master Plan VII.
The plant has a high availability of 97.57%, failure rate <2.43%, meeting high mobilization capacity as required by the power system.
As of 4 August 2020, its commercial power output fed to the national grid: 20.92 billion kWh.
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Vinh Tan 4 Thermal Power Plant (TPP) is designed and operated by coal-fired thermal power technology, with supercritical steam parameters at a temperature of about 593oC and a pressure of 242 bar. Its boilers are designed to burn imported mixed coal (bituminous and sub-bituminous coals), applying advanced Low-NOx coal burner technology to minimize NOx emissions.
Coal consumption when all its three units are operating at full load is 780 tons/hour, equivalent to about 18,720 tons a day. The plant uses imported coal, so the ash and slag content is low.
The ash created is supplied to partners with consumption contracts by specialized tank trucks. The rest is transported by specialized vehicles in a closed process to the slag yard for storage in compliance with the ash and slag treatment process which had been approved by Binh Thuan province, ensuring regulations on environmental protection.
The plant applies the most advanced environmental protection technologies for waste gas treatment, using equipment from industrialized countries such as Japan, Korea, G7, etc.
The plant is equipped with a highly efficient gas emission treatment system: electrostatic precipitator system (ESP), seawater flue-gas desulfurization system (SWFGD), NOx reduction system with selective catalytic reduction system (SCR), Low-NOx coal burner technology to minimize NOx (low-NOx burner) emissions.
In particular, according to the operating process, the ESP system was automatically put into operation right from the start command to ensure that there won’t black smoke going from the stacks during boiler start-up.
For wastewater treatment, the plant is provided with residential wastewater, oil-contaminated wastewater, coal-contaminated wastewater and chemical-contaminated wastewater treatment systems.
Wastewater in the production process is collected and treated as designed to meet Vietnamese standards before being discharged into the environment. Therefore, the plant will ensure that wastewater parameters would be within the limits permitted by standards during operation.
Vinh Tan 4 Thermal Power Plant and Vinh Tan 4 Expansion Thermal Power Plant
Compliance with regulations and transparency in environmental management
The Environmental Impact Assessment (EIA) report of Vinh Tan 4 Thermal Power Plant had been approved by the Ministry of Natural Resources and Environment (MONRE) prior to its implementation. At the same time, MONRE issued a certificate of completion of the environmental protection project; license to exploit and use sea water; permits for discharging wastewater into water sources.
During commercial operation, the plant has fully complied with the regulations on environmental protection in accordance with the law and the approved EIA report, and paid the environmental protection fee as prescribed.
The plant has hired independent functional units to measure and analyze the quality of waste gas and wastewater to evaluate environmental protection works. The results showed that the wastewater and exhaust gas parameters of the plant from coming into operation until now are much lower than the requirements of the approved EIA report and national environmental regulations.
Reports on measuring and observation results from independent units were sent to the General Department of Environment, DONRE of Binh Thuan province, Department of Environmental Crime Prevention Police of Binh Thuan Police, Tuy Phong District People's Committee and Vinh Tan Commune People's Committee for checking and supervision.
Following the direction of Binh Thuan province and MONRE, the plant has installed an automatic and continuous measuring and observation system for waste gas emission and wastewater before being discharged into the environment and has transmitted data directly 24/24 to the DONRE of Binh Thuan province. At the same time, the plant has installed a monitoring camera system for the coal storage, which transmits images to DONRE of Binh Thuan province for supervising and is carrying out procedures for installing electronic boards indicating environmental parameters in front of the plant gate for people to track, check, and supervise.
Representatives of Vinh Tan Commune People's Committee and people of Hamlet 7 visiting Vinh Tan 4 Thermal Power Plant on 16 July 2020
The plant invited the People's Committee of Vinh Tan commune and representatives of households living in Hamlet 7, Vinh Phuc village, Vinh Tan commune to visit and supervise power generation and environmental protection of the plant once a quarter to understand better about the modern technology and feel secure about the environmental protection of the plant.
Inspection and supervision teams at Central level, competent organizations, departments, and local authorities have visited and supervised the operation and environmental management of the plant at the coal reception port and coal storage, the conveyor systems, the central control rooms, the ash silo, the slag yard, wastewater treatment systems, exhaust gas treatment systems, circulating water cooling channel. The minutes of inspection and supervision results are disclosed transparently to participating parties. The results of environmental protection parameters do not exceed permissible limits.
Vinh Tan 4 Thermal Power Plant is always ready to welcome departments, organizations and people to visit and supervise power generation and environmental protection to understand better about the great role of coal-fired thermal power for the country's economy, thereby, avoiding false and dishonest information causing bad public opinion, affecting business activities and creating unsafe feelings among the people.
Measuring and observation results of environmental parameters at Vinh Tan 4 Thermal Power Plant implemented by Phuong Nam Center for Environmental Analysis and Measurement:
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Monitoring location
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Unit
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Noise monitoring results
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Year 2020
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QCVN 26:2010/BTNMT
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Quarter I
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Quarter II
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At Vinh Tan 4 Thermal Power Plant
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dB(A)
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63.3
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60.8
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70
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At residential area of hamlet 4
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dB(A)
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60.8
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58.2
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70
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Vinh Tan Commune People’s Committee Centre
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dB(A)
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60.2
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58.8
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70
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At National highway No. 1A
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dB(A)
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69.5
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60.6
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70
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Access road to Slag Yard
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dB(A)
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69.7
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57.7
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70
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Vinh Hao salt field
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dB(A)
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55.6
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52.1
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70
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Shrimp breeding area
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dB(A)
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58.7
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55.3
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70
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At Vinh Tan 4 Expansion Thermal Power Plant
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dB(A)
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68.6
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56.8
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70
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Noise monitoring results