Solid particle heat exchange system for fluidized bed

Abstract

The invention provides a solid particle heat exchange system for a fluidized bed, and belongs to the field of heat exchangers. The solid particle heat exchange system for the fluidized bed comprises afluidized bed heat exchanger, an air supply part and a reflux part; the air supply part comprises an air supply pipeline which is provided with a heat; the air supply pipeline is provided with a first air inlet end, a first air outlet end and an air mixing section positioned between the first air inlet end and the first air outlet; the reflux part comprises a reflux pipeline; the reflux pipelineis provided with a second air inlet end and a second air outlet end; the first air inlet end is connected with a fresh air inlet; the first air outlet end communicates with a fluidizing air inlet of the fluidized bed heat exchanger; a fluidizing air outlet of the fluidized bed heat exchanger communicates with the second air inlet end; the second air outlet end is connected with the air mixing section; and the air mixing section is used for mixing the gas introduced from the first air inlet end and the gas flowing out from the second air outlet end. Preheating and temperature rising of the fluidized bed heat exchanger and prepacking can be completed effectively, so that high-temperature particles are prevented from entering the fluidized bed heat exchanger to affect the service life of theheat exchanger because of rising temperature too fast.

Description

technical field [0001] The invention relates to the field of heat exchangers, in particular to a fluidized bed solid particle heat exchange system. Background technique [0002] sCO with high efficiency and low cost potential with temperature above 700°C 2 Solar thermal power generation system is currently a hotspot in international solar thermal power generation research. The European Union and the US DOE launched the technology research program in 2018. with sCO 2 The representative solar thermal power generation system mainly consists of high focal ratio concentrators, high temperature absorbers, supercritical CO 2 Heat Exchanger and Supercritical CO 2 Turbines and other four parts. [0003] The solar energy utilization technology that uses solid particles as the heat transfer medium can heat up to 900-1000°C due to the heat absorption of the particles, breaking through the operating temperature of about 560°C of traditional molten salt, and is a high-temperature sup...

AI Technical Summary

Problems solved by technology

However, in view of the special requirements of frequent start-stop and rapid start-up of photothermal power plants, the solid particle heat exchange system is required to have its own preheating function and be able to be put into operation in a short period of time. This is not fully described in the literature

Images