Electric heating fluidized bed heat accumulator and heat supply system

Abstract

The invention provides an electric heating fluidized bed heat accumulator. A winding electromagnetic heating coil is arranged outside the heat accumulator, solid heat accumulation particles are arranged in the heat accumulator, an electromagnetic heating coil (6) is arranged on the outer side of the fluidized bed heat accumulator (2), an air inlet chamber is arranged below the fluidized bed heat accumulator (2), an air outlet pipe is arranged on the upper portion of the fluidized bed heat accumulator (2), and the density of the electromagnetic heating coil is larger and larger from bottom to top in the height direction of the fluidized bed heat accumulator. Due to changes of the distribution density of the designed coil in the height direction, heat exchange in the heat accumulator forms asimilar countercurrent heat exchange process, heat exchange is more effective and sufficient, and the overall heat exchange effect is enhanced.

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

[0006] 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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