Efficient Empowerment Between Movement and Stillness: Comprehensive Noise Control Solution for Gas-Steam Combined Cycle Power Generation Projects

Gas-steam combined cycle power generation, with its outstanding advantages of efficiency, flexibility, and cleanliness, has become a vital component of modern power systems. However, multiple steps in the process generate high levels of noise, posing challenges to the occupational health of plant workers and the quality of the surrounding acoustic environment. Sanyuan Environment, with its extensive experience in industrial noise control, systematically analyzes the noise sources of such projects and provides comprehensive, end-to-end noise control solutions.

1. Identify the main noise sources: Understand the noise characteristics from the source

The noise sources of gas-steam combined cycle power generation systems are numerous and have the characteristics of high sound pressure level, complex spectrum, and concentrated distribution. They can be mainly divided into the following categories:

gas turbine

As a core equipment, it is one of the largest noise sources in power plants, with noise levels typically exceeding 100-110 dB(A). The main noise levels include:

Aerodynamic noise: The injection noise generated by high-speed exhaust has a wide frequency band and travels far;

Mechanical noise: vibration and noise generated by high-speed operation of components such as turbines and compressors;

Combustion noise: The low-frequency roar produced by the burning of fuel in the combustion chamber.

Waste heat boiler system and steam turbine

Boiler exhaust/venting noise: High-temperature and high-pressure steam is periodically discharged into the air, producing extremely strong medium- and high-frequency howling. It is one of the most sudden and influential noises in power plants.

Steam turbine noise: mechanical noise generated by the operation of the steam turbine and its auxiliary equipment.

Large auxiliary system

Generator and exciter: electromagnetic noise and cooling fan noise.

Various pump groups (circulating water pumps, feed water pumps, etc.): motor operation noise and fluid dynamic noise.

Air compressor: Suction and exhaust noise, significant vibration.

Cooling tower group: fan group aerodynamic noise and water spray noise.

Other noise sources

Pipeline system: regenerative noise and valve throttling noise generated by high-speed fluid (steam, gas) transportation.

Transformer: Continuous power frequency electromagnetic hum.

2. Systematic governance measures: creating a fully quiet factory

Sanyuan Environment adheres to the governance principles of "reducing noise at the source, blocking transmission paths, and protecting sensitive points" to provide one-stop customized solutions.

1. Gas turbine and waste heat boiler area

Soundproof enclosure: Modularly designed high-efficiency ventilation and sound insulation enclosure for gas turbines and waste heat boilers, integrating sound insulation, ventilation, heat dissipation and maintenance functions, with a noise reduction of up to 25-35 dB(A).

Exhaust silencer: Aiming at the high temperature and high pressure exhaust of gas turbine, an ultra-large impedance composite silencer is designed and installed to effectively suppress high-frequency and low-frequency noise.

Boiler exhaust silencer: Install high-efficiency exhaust silencers on the exhaust ports of safety valves and pressure relief valves. This is the key to controlling sudden strong noise.

2. Steam turbine and auxiliary equipment plant

Plant sound insulation: Sound-absorbing and sound-insulating wall/roof systems are used in the steam engine room and auxiliary machine building, and sound-insulating doors and windows are used to turn the entire plant into a "soundproof enclosure".

Ventilation and Silence: Design silencer louvers or silencer ducts for the forced ventilation system of the factory to resolve the contradiction between heat dissipation and noise reduction.

3. Outdoor equipment and piping systems

Sound barrier: Set up high-efficiency sound barriers around high-noise equipment areas (such as cooling towers and air compressor clusters) close to the factory boundary to specifically block the spread of noise.

Equipment vibration reduction: Flexible foundations and vibration absorbers are installed for pump groups, compressors, etc., and elastic supports and hangers and wall seals are installed for the piping system to completely cut off the "structure-borne sound" path.

Pipe wrapping: Use sound insulation wrapping measures on high-noise pipelines to suppress fluid noise radiation.

4. Protection of factory boundaries and sensitive points

Plant boundary noise compliance planning: Use acoustic simulation software to predict the plant boundary noise contribution value, optimize the overall layout and control measures, and ensure that the plant boundary meets the standards after operation.

Soundproof windows: For sensitive buildings very close to the power plant, ventilation and soundproof windows can be installed as a final safeguard.

Gas-steam combined cycle power generation is a vital force in energy transformation, and its green credentials should not be diminished by noise pollution. Sanyuan Environment is committed to helping power customers achieve the multiple goals of environmental compliance, safe production, and community harmony through scientific, economical, and efficient noise reduction solutions.