A steam-water flushing method for a high-temperature-resistant solid-state heat storage system

Abstract

The invention relates to the technical field of solid heat storage, in particular to a water distilling rinsing method for a high-temperature-resistant solid heat-storage system. The method comprisesthe steps that water is continuously added in a pipeline of a solid heat storage medium, and the water temperature of the added water is controlled to rise gradually, so that synchronization of pipeline rinsing and solid heat-storage medium heat-exchange temperature-rising water distilling is realized; when the solid heat storage medium is heated to a preset temperature, water adding is stopped; high-temperature steam is continuously introduced into the pipeline of the solid heat-storage medium; and the solid heat-storage medium is heated and dried continuously. By adopting the method, water is firstly added, and then the steam is introduced; when the high-temperature steam is introduced in, the solid heat-storage medium is heated to the certain temperature by water, so that the conditionthat the solid heat-storage medium is cracked because of sharp heating cannot occur when the high-temperature is introduced in, and damage of the solid heat-storage medium is avoided; meanwhile, whenthe solid heat-storage medium is subjected to water distilling when the water is added, the water can also rinse the pipeline and wash impurities in the pipeline out; and conditions are created for subsequent blowing.

Description

technical field [0001] The invention relates to the technical field of solid-state energy storage, in particular to a method for flushing a high-temperature-resistant solid-state heat storage system with steam. Background technique [0002] The advantage of solar thermal power generation is that it can avoid the expensive silicon crystal photoelectric conversion process, which can greatly reduce the cost of solar power generation, and can store the heat energy converted from solar energy, even after the sun sets or in rainy weather. Still can continue to generate electricity. [0003] The thermal storage tower of a solar thermal power station is a thermal storage module used to store thermal energy. When storing energy, feed hot steam into the heat storage tower, and the hot steam completes heat exchange with the heat storage medium (concrete) through the tube bundle in the heat storage tower, and discharge condensed water; when supplying energy, feed water into the heat st...

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Problems solved by technology

The above two steps are operated step by step, which is time-consuming and labor-intensive, and because the initial temperature of the concrete when drying is relatively low, which is about 20°C, and under normal circumstances, the temperature of the concrete after drying is 300-450°C, and the temperature span before and after is large. Concrete heats up rapidly during the drying process, which can easily cause concrete cracking, thus affecting the normal use of the heat storage tower

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