Heat conduction oil leakage detection system and method for steam generation systems of photo-thermal power station

Abstract

The invention provides a heat conduction oil leakage detection system and method for steam generation systems of a photo-thermal power station. The steam generation systems of a photo-thermal power station are arranged in two rows; each row of steam generation system includes a pre-heater, a steam generator, a super-heater and a re-heater; accordingly, the heat load of each row of steam generation system is 50% of the total load of the power station; and compared with one row of steam generation system, the heat load of each device in each row of steam generation is decreased, and then the probability of leakage can be decreased from the source. A safe protective device for preventing pressure impact is arranged on each row of steam generation system, once leakage occurs, the pressure can be reduced timely and effectively; the whole row of steam generation system with leakage can be isolates timely, thereby facilitating maintaining it; and the other row of steam generation system works normally, it is ensured that the photo-thermal power station can normally work, and the reliability of the whole system can be improved.

Description

technical field [0001] The invention belongs to the technical field of heat transfer oil leakage detection, and in particular relates to a detection system and method for heat transfer oil leakage in a steam generation system of a photothermal power station. Background technique [0002] Photothermal power generation technology has been fully commercialized in the international field, and the technology of thermal oil-water heat exchange steam generation system (SGS) in photothermal power stations has become increasingly mature. Conventional heat transfer oil-water heat exchange type CSP steam generation system mainly includes: superheater, reheater, steam generator and preheater; it is mainly used to transfer the heat collected by the solar collector field to high pressure through heat transfer oil Feed water, and then generate medium temperature and high pressure steam to drive the steam turbine to generate electricity. The heat transfer oil-water heat exchange type solar...

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Problems solved by technology

The heat transfer oil-water heat exchange type solar thermal power plant steam generation system is the core equipment of the solar thermal power plant. It needs to be started and stopped every day. During its operation, the load changes greatly, the operating conditions are harsh, and it is prone to leakage

If the steam generation system leaks, the high-pressure feed water will leak to the heat transfer oil side with low pressure. Due to the pressure drop, the water will suddenly evaporate on the heat transfer oil side and become steam. If the leakage is relatively large, the high pressure generated by water vaporization will explode, thereby Damage to the components of the steam generation system, resulting in the outage of the power station and failure to generate electricity

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