Electric heating fluidized bed solid heat storage and supply system

Abstract

The invention provides an electric heating fluidized bed solid heat storage and supply system. The system comprises an electromagnetic heating coil, an air inlet chamber, an air distribution plate, afluidized bed heat accumulator, a gas-solid separation device, a heat exchanger, a controller and the like. The system stores heat in a sensible heat form through solid particles; the outer side and the bottom of the fluidized bed heat accumulator are provided with the electromagnetic heating coil, and the air distribution plate is arranged on the lower side; the solid particles such as quartz sand are arranged in the fluidized bed heat accumulator, and an air outlet pipe is also arranged and connected with the heat exchanger; and a grid and an air return pipeline are arranged in the air outlet pipe, the gas-solid separation device is arranged in front of the air outlet pipe, and the heat exchanger is arranged behind the air outlet pipe and connected with the air return pipeline. The system improves the energy utilization in the off-peak electricity period, saves the heat supply operation cost, and overcomes the defects of non-uniform solid heat storage, insufficient heat release and difficult control.

Description

technical field [0001] The invention belongs to the field of heat storage and energy utilization, in particular to an electrically heated fluidized bed solid heat storage and heat supply system. Background technique [0002] In recent years, the energy consumed by heating has been increasing year by year, and the gap between peak and valley electricity consumption has gradually widened, resulting in an increasingly prominent problem of electric energy waste. In order to cut peaks and fill valleys, it is necessary to develop new energy storage technologies, and the regulation capacity of the power grid will be greatly affected by this. Improvement has long-term and far-reaching significance to my country's energy security and energy conservation and emission reduction. Under the background of resource waste, coal-to-gas conversion has become a new energy-saving and emission-reduction method, but it has not achieved very good results. Therefore, it is necessary to develop valle...

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Problems solved by technology

[0005] The present invention solves the problem that existing phase-change materials have low thermal conductivity, which makes it difficult to take out stored heat energy, uneven solid heat storage, difficult to control, direct use of solid particles for complex heat exchange structure, low heat exchange efficiency, and long service life of heat exchangers. low-level problems, and at the same time, it can be used in valleys and peaks to balance the load of the grid

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