Shishi City Thermal Power Double-Layer Steam Turbine Cover Sound Insulation and Noise Reduction Steam Turbine Enclosure

Steam turbine generator units in the Jiangsu, Anhui, Zhejiang, and Shandong regions can be considered the core equipment of power plants and thermal power plants. Moreover, steam turbine units are generally large in size and high in power. During operation, the noise generated is also very significant, especially for older units, where the noise impact can extend throughout the entire plant area. So, how can noise control be implemented for steam turbine generator units? Solutions include using steam turbine enclosures, steam turbine soundproofing (acoustic) enclosures, insulation enclosure covers, and steam turbine cosmetic panels. These products are sold to hundreds of power plants and thermal power plants across Jiangsu, Shandong, Zhejiang, and Anhui.

I. Issues to Consider in Steam Turbine Noise Control

1. Soundproofing: Select appropriate soundproof panels, soundproof doors, and accessories to ensure the steam turbine soundproof enclosure meets noise control requirements.

2. Ventilation: Gas turbines are significant heat sources. When adding a soundproof enclosure, consider installing a ventilation system to exhaust heat outdoors. The ventilation system should include electrical control equipment to monitor its operational status.

3. Ventilation Noise: After installing the ventilation system, consider the impact of fan noise on the environment.

4. Lighting: To facilitate maintenance personnel's routine inspections inside the enclosure, lighting and emergency lighting systems must be installed inside.

5. Explosion-Proof: The interior of the steam turbine enclosure, soundproof acoustic enclosure, insulation enclosure cover, and steam turbine cosmetic panel soundproof enclosure is classified as Zone 2. Electrical equipment used inside the enclosure and in the ventilation system must have explosion-proof capabilities.

6. Disassembly: To facilitate gas turbine maintenance, the soundproof enclosure must be designed for repeated, quick disassembly, ensuring that after maintenance, it meets or exceeds the original design standards.

7. Connection: The soundproof enclosure must consider how to connect and coordinate with equipment on both ends and how to minimize connection gaps.

8. Structure: Determine the stiffness, strength, and stability of the soundproof enclosure's steel structure and select suitable section steel.

Steam turbine noise primarily consists of aerodynamic noise from the exciter and vibration noise from other components. After years of research and technical development, Jiangsu Yufeng Equipment Technology Co., Ltd. addresses the noise source directly through soundproofing, analyzing the characteristics of the sound source and designing steam turbine soundproof enclosures based on on-site needs. They have successfully resolved noise issues for hundreds of power plants.

II. Overall Quality Requirements for Steam Turbine Enclosure Projects

1. After project completion, the overall quality of the steam turbine enclosure, steam turbine soundproof (acoustic) enclosure, insulation enclosure cover, and steam turbine cosmetic panel must comply with relevant national, industry, or standard specifications and meet the requirements agreed upon in this agreement.

2. When the ambient temperature does not exceed 25°C, the enclosure temperature should not exceed 50°C. When the ambient temperature exceeds 25°C, the difference between the external surface temperature and the ambient temperature should not exceed 25°C.

3. Corrosion resistance must comply with the GB2086-2006 standard, ensuring no discoloration or deformation.

4. The steam turbine enclosure, steam turbine soundproof (acoustic) enclosure, insulation enclosure cover, and steam turbine cosmetic panel must be installed firmly and reliably.

5. The layout should be reasonable, tight, neat, and aesthetically pleasing.

6. Noise must be significantly reduced, with at least a 6 dB reduction after installation.

7. Made from cold-rolled steel plates: The enclosure dimensions are 12000mm × 9000mm × 3000mm (customizable). The main columns and beam framework of the enclosure are constructed from rectangular square steel, connected with high-strength bolts in an assembled structure. The design of the main columns and beam framework should avoid the bearing seats of the steam turbine generator unit to prevent interference with bearing maintenance. The four walls of the enclosure are assembled from steel structure soundproof acoustic panels, with the outer walls made of cold-rolled steel plates no less than 1.5mm thick and internal panels made of 1.0mm cold-rolled steel plates.

8. The steam turbine enclosure, steam turbine soundproof (acoustic) enclosure, insulation enclosure cover, and steam turbine cosmetic panel include 4 soundproof doors with observation windows. The doors should open flexibly and close tightly.

9. The lower part of the enclosure's four walls should have an appropriate number of air inlets (soundproof ventilation openings, with area determined by the bidder).

10. The top of the steam turbine enclosure is made from perforated plates, with lifting rings installed for easy hoisting. Six low-noise fans are installed for forced exhaust and heat dissipation. The interior is equipped with a full set of LED lighting facilities to facilitate inspections by maintenance personnel inside the cosmetic panel enclosure.

11. The internal space and door positions of the steam turbine enclosure, steam turbine soundproof (acoustic) enclosure, insulation enclosure cover, and steam turbine cosmetic panel should be reasonably designed to ensure that cosmetic panel components do not contact the equipment.

12. The enclosure should be easy to disassemble and assemble, with reasonably预留 lifting rings and holes. The structural strength of individual cosmetic panels should meet requirements for hoisting and stacking without deformation. The needs of major and minor overhauls should be fully considered to minimize disassembly work during major overhauls.

13. The surface paint color of the enclosure is unified light gray. Electrostatic spraying is applied, followed by high-temperature curing.

14. The steam turbine enclosure, steam turbine soundproof (acoustic) enclosure, insulation enclosure cover, and steam turbine cosmetic panel should have vibration damping measures at ground contact points to reduce vibration caused by foundation movement.

15. The steam turbine enclosure, steam turbine soundproof (acoustic) enclosure, insulation enclosure cover, and steam turbine cosmetic panel must be factory-processed for direct on-site installation; on-site fabrication is not allowed. Hot work is prohibited on-site.

16. Design, manufacturing, and installation unit: Jiangsu Yufeng Equipment Technology Co., Ltd.

■ Excerpted from: Yufeng Equipment     ■ Author: Planning Department    ■ T: 13812456367   

Steam Turbine Soundproof Enclosure Manufacturer

Steam turbines are the main equipment in power plants and generate high-intensity noise exceeding 120 dB(A) during operation, severely affecting the working environment and endangering human health. Based on noise control practice projects, there are two main technical solutions for addressing steam turbine noise: overall workshop noise reduction and steam turbine soundproof enclosure enclosure. From the perspectives of worker occupational health, environmental noise control costs, and benefits, implementing customized steam turbine soundproof enclosures is currently the most feasible, cost-effective, and efficient method.

Steam turbine noise primarily consists of aerodynamic noise from the exciter and vibration noise from other components. Hanx Soundproofing addresses the noise source directly, analyzing its characteristics and designing steam turbine soundproof enclosures based on on-site needs, having successfully resolved noise issues for multiple power plants.

Brief advantages of steam turbine soundproof enclosures provided by Lanshide Environmental Protection:

1. The design includes composite soundproof panels, soundproof doors, and intake/exhaust silencers, ensuring normal operation without affecting the turbine's lifespan and facilitating daily maintenance and monitoring.

2. The soundproof enclosure is assembled from five side panels into a whole, allowing for complete installation and disassembly during major overhauls.

3. Based on on-site needs, the high-pressure cylinder part of the soundproof enclosure can also be designed as a hoistable structure, with the enclosure not fully sealed and topped with ventilation openings and louvers.

4. Considering safety and aging issues, the inner walls of the panels are coated only with damping paint and an epoxy resin damping layer to reduce panel vibration.