Power plant turbine cover

Steam turbine generator sets 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 the operation of steam turbine units, 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 sets? Solutions include using steam turbine enclosures, steam turbine soundproofing (silencing) enclosures, insulation enclosure covers, and steam turbine cosmetic panels. The products are sold to hundreds of power plants and thermal power plants across Jiangsu, Shandong, Zhejiang, and Anhui.

I. Issues to Consider for 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 must be equipped with electrical control devices 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 in performing routine inspections inside the enclosure, the enclosure must be equipped with lighting and emergency lighting systems.

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

6. Disassembly: To facilitate gas turbine maintenance, the soundproof enclosure must feature repeatable and quick disassembly functions, ensuring that post-maintenance performance is not lower than the original design level.

7. Connection: The soundproof enclosure must consider how to connect and coordinate with equipment at 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 appropriate section steel.

Steam turbine noise primarily consists of aerodynamic noise from the exciter and vibration noise from other components. Jiangsu Yufeng Equipment Technology Co., Ltd., after years of research and technical development, addresses the noise source itself through soundproofing, analyzes the characteristics of the noise source, and designs steam turbine soundproof enclosures based on on-site requirements. They have successfully resolved noise issues in hundreds of power plants.

II. Overall Quality Requirements for Steam Turbine Enclosure Projects

1. Upon project completion, the overall quality of the steam turbine enclosure, steam turbine soundproof (silencing) enclosure, insulation enclosure cover, and steam turbine cosmetic panel must comply with relevant national standards, industry standards, or 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 (silencing) enclosure, insulation enclosure cover, and steam turbine cosmetic panel must be installed firmly and reliably.

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

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

7. Manufactured using 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 section steel, connected with high-strength bolts, and feature an assembly-type structure. The design of the main columns and beam framework must avoid the bearing seats of the steam turbine generator set to prevent interference with bearing maintenance. The four walls of the enclosure are assembled from steel structure soundproof acoustic panels, with the outer layers made of cold-rolled steel plates no less than 1.5mm thick and internal panels made of 1.0mm thick cold-rolled steel plates.

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

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

10. The top of the steam turbine enclosure is made of perforated plates, equipped with lifting rings for hoisting, and installed with 6 low-noise fans for forced exhaust and heat dissipation. The interior is equipped with a full set of LED lighting facilities to facilitate inspections by personnel inside the cosmetic panel enclosure.

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

12. The enclosure must be easy to disassemble and assemble, with reasonably reserved lifting rings and holes. The structural strength of individual cosmetic panels must meet the requirements for hoisting and stacking without deformation. The needs of major and minor repairs of the unit must be fully considered, minimizing the workload of disassembling and assembling cosmetic panels during major repairs.

13. The topcoat color of the enclosure must be uniform light gray. The surface must be electrostatically sprayed and cured at high temperatures.

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

15. The steam turbine enclosure, steam turbine soundproof (silencing) enclosure, insulation enclosure cover, and steam turbine cosmetic panel must be factory-processed and ready 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 methods to address steam turbine noise: overall workshop noise reduction and steam turbine soundproof enclosure enclosure. From the perspective 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 solution.

Steam turbine noise primarily consists of aerodynamic noise from the exciter and vibration noise from other components. Hanx Soundproofing addresses the noise source itself, analyzes its characteristics, and designs steam turbine soundproof enclosures based on on-site requirements, successfully resolving noise issues in multiple power plants.

Advantages of steam turbine soundproof enclosures provided by Lanshide Environmental Protection:

1. The design includes composite soundproof panels, soundproof doors, and intake/exhaust silencers to ensure normal operation of the steam turbine without affecting its service life, while facilitating daily maintenance and equipment monitoring.

2. The soundproof enclosure is assembled from five side panels into an integrated structure, allowing for overall installation and disassembly during major unit repairs.

3. Based on on-site requirements, the soundproof enclosure for the high-pressure cylinder section can also be designed as an integrated hoisting structure, with the enclosure not fully sealed and featuring ventilation openings and louvers on the top.

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.