Inclined tubulation particle/supercritical CO2 moving bed heat exchanger

Abstract

The invention discloses an inclined staggered tubulation particle / supercritical CO2 moving bed heat exchanger. The moving bed heat exchanger comprises a moving bed main body, inlet supercritical CO2 gas distribution pipes, outlet supercritical CO2 gas collecting pipes, supercritical CO2 serpentine heat exchange pipes, a particle distributor and a particle collecting hopper, wherein the moving bedmain body is used for providing a heat exchange place for the high-temperature particles and the supercritical CO2 in the pipe, the inlet supercritical CO2 gas distribution pipes are used for uniformly distributing the low-temperature supercritical CO2 in each heat exchange pipe, the outlet supercritical CO2 gas collecting pipes are used for collecting high-temperature supercritical CO2 gas, the supercritical CO2 serpentine heat exchange pipes are installed in the moving bed main body according to the preset inclination angle, and are used for providing a heat exchange channel for the supercritical CO2 in the pipe and eliminating accumulation of particles in the pipe, the particle distributor is used for uniformly entering the high-temperature particles into the moving bed main body, and the particle collecting hopper is used for collecting the falling low-temperature particles. According to the heat exchanger, by changing the inclination angle and the arrangement structure of the heatexchange pipes in the moving bed heat exchanger, the turbulence of the particles is enhanced, the contact surface and the heat exchange coefficient are increased, and the efficiency of the heat exchanger is greatly improved.

Description

technical field [0001] The invention relates to the technical field of high-temperature solar thermal power generation, in particular to an inclined tube particle / supercritical CO 2 Moving bed heat exchanger. Background technique [0002] with supercritical CO 2 The operating pressure of the high-temperature solar power generation system for circulating working medium is greater than 15 MPa, and the temperature is higher than 600 ° C. It has the potential of high efficiency and low cost, and is currently a hot spot in international solar thermal power generation research. The European Union and the US DOE launched the technology research program in 2018. Limited to the development level of current materials and processing technology, direct use of solar energy to heat supercritical CO 2 The risk factor of thermal power generation is extremely high, and the second medium such as particles, molten salt, etc. are usually introduced to absorb the high heat flux of concentrate...

AI Technical Summary

Problems solved by technology

However, the top of the circular tube of the tubular moving bed heat exchanger is easy to accumulate particles, forming a dead zone, resulting in poor heat transfer

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