System for hindering falling of particles into solar heat absorber

Abstract

The invention discloses a system for hindering falling of particles into a solar heat absorber. The system is arranged inside the heat absorber and comprises a plurality of blocking mechanisms which are arranged in a staggered mode from top to bottom, each blocking mechanism comprises a horizontal adjusting rod and a plurality of blocking units which are arranged in the horizontal extending direction of the horizontal adjusting rod and movably connected with the horizontal adjusting rod, the blocking units comprise vertical connecting rods, sliding blocks, cams, elastic components, top plates and bottom plates, the upper ends of the vertical connecting rods are movably connected with the horizontal adjusting rods, the lower ends of the vertical connecting rods are movably connected with the cams, and the sliding blocks are attached to the left sides and the right sides of the edges of the cams correspondingly; the upper sides and the lower sides of the sliding blocks are in sliding fit with the inner side parts of the top plates and the bottom plates correspondingly, and the elastic components are fixed between the inner ends of the sliding blocks and the outer ends of the top plates, and therefore, the staying time and the heating temperature of the particles inside the heat absorber can be adjusted and controlled according to the intensity condition of solar illumination.

Description

technical field [0001] The invention relates to the technical field of solar tower-type concentrating thermal power generation, in particular to an impeding system for particle falling solar heat absorbers. Background technique [0002] Solar tower thermal power generation uses heliostats to reflect direct solar radiation and gather it on a heat absorber installed at a certain height. The heat absorber collects the heat of the sun, and transmits the heat energy to the thermal energy storage device on the ground and The steam generator generates steam to drive a steam turbine to generate electricity. Among them, the heat-absorbing medium adopts particles, such as desert sand and other gravels, with a particle size of 200-600 microns. The characteristics of high temperature resistance, corrosion resistance, wear resistance and low cost of gravels are used to reduce the material cost of solar thermal power generation. The cost performance of gravel is better than that of tower...

AI Technical Summary

Problems solved by technology

Obviously, the above-mentioned existing blocking mechanisms have the following disadvantages: they are all stationary components, and cannot actively adjust the process of the falling and flowing of the particles, and cannot realize accurate adjustment and control of the particle temperature, so that the particle flow cannot be set according to the change of sunlight to achieve the optimal flow rate. Excellent heat absorption effect

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