Power plant-TECHNICAL REQUIREMENTS FOR ENVIRONMENTAL ASPECTS

 

 TECHNICAL REQUIREMENTS FOR ENVIRONMENTAL ASPECTS

            GENERAL

            This section covers the general technical requirements for environmental assessment aspects. These specifications shall be complied with in every respect unless otherwise stated or agreed by the COMPANY/Engineer.

            Power plant equipment shall be designed to meet the emission & emission values of SO2, NOx, inhalable particles (IP) and dust laid down by the latest edition of Standards of Environment Protection in the Kingdom of Saudi Arabia issued by Meteorology and Environmental Protection Administration (MEPA) in force at the time of signing of Contract. In case no standards are formulated by the MEPA regulations, World Bank Standard shall be applied.

            Low NOx burners shall be provided for all GT installations allowing for max. NOx emission concentration in the exhaust gas of 25 ppm during operation on natural gas.

            Provisions shall be provided for a sampling of flue gases with proper sample cooling arrangement.

            The design, for power plant equipment, shall be such that the emission and emission concentrations of these pollutants in the exhaust gas of the plant are restricted to the values ecologically and environmentally acceptable under any load conditions. Injection of water, steam or special chemicals to suppress smoke and reduce NOx contents shall not be allowed. The Bidder shall also state the emission concentrations of SO2, NOx, and dust of the proposed equipment in the Data Sheets.

                        ENVIRONMENTAL PROTECTION REQUIREMENTS

            Applicable Environmental Regulations

            The Project shall comply with the latest edition of the Environmental Standards Limits, and Requirements of the Meteorology & Environmental Protection Administration (MEPA) of Saudi Arabia. In case no standards are formulated by the MEPA regulations, World Bank The standard shall be applied for values given in both standards, most stringent shall be followed. The environmental requirements relevant for the RPP10 Project are listed below:

            ; Emission Limits

            Pollutant emission limits of MEPA and World Bank is listed in the following table.

All limits in mg/Nm³ referring to dry exhaust gas condition at 15 % oxygen

            Conversion of [ng/J] and [% sulfur content in fuel] to [mg/m³] calculated using the most probable plant design data of the proposed GT systems

            Ambient Air Quality Standards

            The relevant ambient air quality standards of MEPA

           ; Waste Water Discharge Standards

            According to the MEPA requirements, all plant effluents to be discharged to surface water reservoirs (cooling water, domestic sewage, contaminated stormwater, other plant effluents) shall be treated to meet the following specified limits before being discharged. The MEPA discharge limits are listed in the following table, along with the corresponding World Bank Limits.

            Reduction of Air Pollutant Emissions

            (Nitrogen Oxides (NOx

            All GTs shall be equipped with dry low NOx burner facilities, which enable reduction of NOx emission during operation on the main fuel crude oil/natural gas (during normal operation on baseload and part load down to 60 %) to a maximum of 25 ppm in the exhaust gas (dry at 15 % O2 and ISO conditions).

            During an operation on Diesel Oil, no NOx the reduction shall be foreseen.

            Sulphur Dioxide (SO2)

With the main fuel crude oil, the SO2 emission will be high in relation to the applicable emission limits of MEPA and World Bank. Therefore, emission reduction facilities are required for SO2.

During an operation on Diesel Oil, no SOx reduction shall be foreseen.

            (Particulate Emissions (Dust

With the main fuel crude oil, the particulate matter (dust) emissions will be experienced. Therefore, emission reduction facilities may be required for particulate matter.

During an operation on Diesel Oil, no dust filtering shall be foreseen.

            (Carbon Monoxide (CO

The CO emissions of the GTs at baseload shall not exceed 25 ppm in the exhaust gas (dry at 15 % O2 and ISO conditions).

            Noise Reduction

            In order to reduce the noise impact on the surrounding area to a minimum, state-of-the-art noise protection shall be installed at the PP10 Plant. The GT units shall be housed at a turbine hall, which shall reduce the ambient noise emissions to the max. 70 dB(A) at 1-m from the plant installations.

            The power plant systems shall be designed to comply with the following noise level standards:

            World Bank Standards for Ambient Noise in the surroundings of the power plant as listed above (applicable in this case: 70 dB(A) for industrial areas).

            The sound level inside buildings shall not exceed 85 dB(A) when all equipment is operating. The sound level shall be measured at a 1-meter horizontal distance from any point of the equipment at 1.5 the meter above floor level.  If there will be areas with higher sound levels than 85 dB(A), it is to be agreed with the COMPANY/Engineer, whether it can be accepted.  In such areas, extensive operation and maintenance activities are not permitted. Adequate noise protection means e.g. using civil structure shall be provided.

.With all equipment in operation the sound level in the local control room(s) shall not exceed 55 dB (A) and in the remote central control room 45 dB (A)

            When all equipment is operating the sound level at 100 m distance outside the building/enclosure shall not exceed 60 dB (A)

            All sound level measurements shall be recorded by means of a sound measuring device according to international standards (e.g. DIN 45 633 adjusted to “Evaluation Curve: A “and “Speed of indication: Fast,)”

            Soil and Ground Water Protection

            All areas subject to possible oil contamination shall be sealed with oil-tight coating, equipped with an efficient drainage system, and covered by roofs to prevent water precipitation on to the contaminated areas. All contaminated drains shall be led through the static oil separator and waste oil-collecting tank.

            The major areas where oil contamination is expected are as follows:

            Standby liquid fuel storage areas

            Lubrication oil storage areas

            Turbine areas

            Transformer areas

            Standby oil unloading and oil handling areas

            Waste oil storage areas

            Collected waste oil and separated oil from oily water, wastes shall be pumped into the sludge storage tank. It can be disposed of through an incinerator or can be trucked off through.

            Wash water of turbine compressors shall be collected separately from other drains and shall be disposed of as described other Section of Technical Specifications.

 

Safety

            All hot engine parts like exhaust pipe, noise damper, valves, etc. shall be insulated with heat-resistant material. Appropriate fire fighting equipment shall be provided. All hazardous materials (fuel, cleaning liquids) must be stored in clearly labeled containers or vessels.

            Safety instruction signs shall be located at the entry of all sensible areas. Shield guards or guard railings should be installed at all belts, pulleys, gears, and other moving parts. Personnel should use earplugs during operation and maintenance work.

            Strict procedures must be followed for de-energizing and checking electrical equipment before maintenance work. Constant supervision must be implemented during maintenance work on energized equipment. Electrical equipment should be grounded, well insulated, and conform to applicable codes.

            COMPANY’s safety rules and regulations shall also be complied with at all times.

            COMPANY Employees shall be trained on the hazards, precautions, and procedures for the safe storage, handling, and use of all potentially harmful materials relevant to each employee’s task and work area. Personnel training shall also be provided on revival techniques for electrocution. A safety and fire protection program shall be established and implemented in regular drills.