Loop design for slot type solar heat power plant

Abstract

The invention discloses a loop design for a slot type solar heat power plant, and relates to the technical field of slot type solar heat power generation. The loop is arranged in a slot type solar heat collecting field; the heat collecting field is divided into a plurality of heat collector units; one of the heat collector units comprises a parabolic glass surface capable of tracking and concentrating sunlight, and a heat collecting pipe placing on the focus line of the parabolic glass surface, each heat collector unit forms a small dip angle with the ground to lead the relative altitude difference between the two ends of the heat collector unit to not exceed 1m. The loop design is characterized in that: the heat collecting pipes of two neighboring heat collector units are connected; then the highest position or the lowest position of the pipelines of the heat collection pipes are formed at the connected part of two neighboring heat collector units; a molten salt recycling valve is arranged at the lowest position of the pipelines of the heat collection pipes, then the heat collection pipes are connected with a recycled molten salt collecting loop through the valve; and a high-temperature high-pressure nitrogen valve is arranged at the highest position of two neighboring heat collector units. The molten salt in a loop pipeline can be completely conveyed to a big heat storage tank for storage in case of needing; in this way, not only is the heat energy loss due to the falling of temperature at night reduced, but also the pipeline safety is guaranteed.

Description

technical field [0001] The invention relates to the technical field of trough solar thermal power generation, in particular, the trough solar thermal power generation uses molten salt as a heat carrier for storing solar heat, and designs a recycling pipeline that can recover molten salt to a heat storage tank for storage when needed Power plant circuit design. Background technique [0002] In the solar thermal power generation technology, the trough system is currently the most mature and widely used solar thermal power generation technology. The trough solar thermal power station mainly includes: large-area trough-shaped parabolic concentrator, tracking device, heat carrier, steam generation and conventional cycle steam power generation systems. The concentrating reflector is made of surface-treated metal sheet or film material. The single-axis solar tracking system ensures that 80 to 100 times the concentrated sunlight can be accurately reflected on the heat absorption tu...

AI Technical Summary

Problems solved by technology

Second, molten salt is corrosive to pipelines, especially rubber and other materials at the joints between pipelines, which will cause leakage of pipelines and affect the safe and normal operation of the system

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