Straight-flow steam generator

Abstract

The invention discloses a straight-flow steam generator which comprises a shell and a plurality of heat exchange tubes. The shell is sequentially divided into an oil inlet chamber, an oil outlet chamber, a preheating chamber, an evaporating chamber, a dehumidifying chamber and an overheating chamber from bottom to top, a heat transfer oil inlet is arranged on the oil inlet chamber, an inner tube plate is arranged between the oil inlet chamber and the oil outlet chamber, a heat transfer oil outlet is arranged on the oil outlet chamber, an outer tube plate is arranged between the oil outlet chamber and the preheating chamber, a feed-water inlet is arranged on the preheating chamber, a steam outlet is arranged on the overheating chamber, each heat exchange tube comprises an inner tube and an outer tube, the bottom end of each inner tube extends into the oil inlet chamber and is fixed onto the inner tube plate, the top end of each inner tube extends to the upper portion of the corresponding outer tube, the bottom end of each outer tube extends to the oil outlet chamber and is fixed onto the outer tube plate, the top end of each outer tube is provided with a closed structure and extends to the overheating chamber, and each inner tube and the corresponding outer tube form an interlayer structure. The straight-flow steam generator effectively solves the problem of poor heat expansion, and has the advantages of stability, reliability, safety, high heat exchange efficiency and the like.

Description

technical field [0001] The invention relates to a steam generator, in particular to a once-through steam generator, which is especially suitable for use in solar thermal power generation systems. Background technique [0002] Solar thermal power generation uses a large number of mirrors to focus direct solar light in a focused manner, heats the heat transfer oil, and uses the heat transfer oil to heat the water liquid in the steam generator, so that the water liquid forms high-temperature and high-pressure steam, and the steam drives the steam turbine. generate electricity. Therefore, the steam generator is one of the core components of the solar thermal power generation system. [0003] At present, there are two types of steam generators commonly used in solar thermal power generation systems: saturated steam generators and once-through steam generators. Among them, the saturated steam generator preheats and evaporates the water liquid with the working medium that flows t...

AI Technical Summary

Problems solved by technology

Therefore, although this technology can solve the problem of thermal expansion difference of the steam generator, it cannot realize the reverse flow of the media on both sides, the heat transfer effect is poor, the heat transfer efficiency is low, and the structure is complex and difficult to manufacture.

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