A Supporting Baffle Structure for Steam Generator with Efficient Heat Transfer Performance

Abstract

The invention belongs to the technical field of nuclear power plant steam generators, and particularly relates to a steam generator supporting partition plate structure with efficient heat transfer performance. Each supporting partition plate is an incomplete supporting partition plate, and each supporting partition plate is arranged in the height direction in a steam generator. An opening of the supporting partition plate at the bottommost end directly faces the cold section of a loop of the steam generator, and the same deflection angle exists between every two adjacent layers of supporting partition plates from bottom to top. The spaces between every two adjacent layers of supporting partition plates are equal or are sequentially decreased from top to bottom. By the adoption of the structure, it is guaranteed that a tube bundle is fixed, the tube bundle is prevented from being affected by fluid flow so that vibration can be avoided, meanwhile, the flowing mode of secondary side fluid is changed, fluid can flow past an inverted U-shaped tube transversely, hence, an original longitudinal heat exchange mode is changed into a transverse heat exchange mode, heat exchange efficiency is improved, and the thermal siphon phenomenon is avoided; meanwhile, secondary side transverse flow enables corrosion products and chemical products not to be deposited between a supporting plate and a heat transfer plate easily, corrosion damage is reduced, and the service life of heat transfer pipes and the service life of the supporting partition plates are prolonged.

Description

technical field [0001] The invention belongs to the technical field of steam generators in nuclear power plants, and in particular relates to a support partition structure of a steam generator with high-efficiency heat transfer performance. Background technique [0002] As an important piece of equipment in a nuclear power plant, the steam generator transfers the heat in the coolant of the primary circuit to the feed water of the secondary circuit, making it generate saturated steam to supply the power plant of the secondary circuit. As a device connecting the primary circuit and the secondary circuit, the steam generator constitutes a second barrier between the primary and secondary circuits to prevent radioactive leakage. [0003] In the steam generator of Daya Bay Nuclear Power Station, there are 4474 inverted U-shaped tubes, which are used to fix the tube bundle, prevent the heat exchange tube from vibrating due to the influence of fluid flow, and ensure that there is no...

AI Technical Summary

Problems solved by technology

[0007] (2) The temperature difference between the hot side and the cold side of the heat transfer tube leads to uneven temperature of the working medium on the secondary side, resulting in thermosiphon phenomenon, which needs to be weakened by the method of unevenly distributed water supply;

[0008] (3) There are still serious corrosion phenomena in the above three support plate structures

Images