Temporary ventilation system arranged in steel containment

By installing a temporary ventilation system with multiple layers of ducts and external fans inside the steel containment structure, the ventilation problem during the construction phase after the steel containment structure was capped was solved, achieving efficient smoke extraction and space utilization, and improving the construction environment and schedule.

CN121938673APending Publication Date: 2026-04-28CHINA NUCLEAR IND FIFTH CONSTR CO LTD
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Patent Information

Application Number
CN202511911651.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-17
Publication Date
2026-04-28

AI Technical Summary

Technical Problem

In the field of nuclear power construction, ventilation during the construction phase after the steel containment vessel is capped is a problem. Existing technologies occupy a lot of space, affect the construction progress, and increase the risk of damage to finished products.

Method used

Design a temporary ventilation system for a steel containment, including upper and lower exhaust systems, horizontal and vertical main duct components and fans, to collect flue gas through multi-layer ducts and exhaust it using external fans, thereby reducing space occupation and improving ventilation efficiency.

Benefits of technology

It effectively reduces flue gas accumulation and residue, improves the quality of the construction environment, provides a healthy working environment, and at the same time improves space utilization and avoids construction delays.

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Abstract

The invention discloses a temporary ventilation system arranged in a steel containment vessel, which is suitable for the steel containment vessel and comprises an upper exhaust system, a lower exhaust system, a first transverse and vertical main pipe assembly and a second transverse and vertical main pipe assembly, and the upper exhaust system and the lower exhaust system are both arranged in the steel containment vessel. The upper exhaust system is arranged at the upper end of the lower exhaust system, one end of the first transverse and vertical main pipe assembly extends into the steel containment and is connected with the upper exhaust system, and one end of the second transverse and vertical main pipe assembly extends into the steel containment and is connected with the second transverse and vertical pipe assembly. Through the application of the invention, the temporary ventilation system arranged in the steel containment vessel is provided, and the temporary ventilation system can effectively collect flue gas generated at different heights, so that the sedimentation and residual rate of the flue gas in the steel containment vessel can be reduced; in addition, the probability that the temporary ventilation item occupies the space of the formal item is reduced, more sufficient space is provided for construction of the formal item, and the space utilization rate of the steel containment is increased.
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