Molten salt regenerative electric heating central heating system

Abstract

The invention relates to a molten salt heat storage type electric heating central heating system, and belongs to the technical field of heat storage. The molten salt heat storage type electric heating central heating system comprises a molten salt electric heater, a high-temperature hot salt tank, a low-temperature cold salt tank, a molten salt pump, a molten salt-water heat exchanger and a heat user. During the time period of low-price low off-peak electricity at night, the molten salt in the cold salt tank is pumped out through the molten salt pump to be conveyed to the molten salt electric heater for heating, and enters the hot salt tank after being heated up to high temperature. During the time period of a power utilization peak, the high-temperature molten salt, with accumulated heat, in the hot salt tank is pumped put through the molten salt pump to be conveyed to the molten salt-water heat exchanger and heats water used for municipal heating to produce hot water for supplying heat to residents. On the basis of a coal-fired boiler central heating system which is in general use at present, only a boiler room of the central heating system needs to be transformed into the molten salt heat storage type electric heating system, and neither a municipal heat supply pipe network nor heat supply terminal equipment needs to be transformed. Besides, the molten salt heat storage type electric heating central heating system can cut down a peak to supplement a trough and reduce the usage amount of coal, thereby playing a role in protecting the environment.

Description

technical field [0001] The invention relates to an electric heating heat storage system, in particular to a system which adopts molten salt as a heat storage working medium and utilizes off-peak electricity for centralized heating, and belongs to the technical field of heat storage. Background technique [0002] Under the current situation of smog covering China, many provinces and cities in China have launched coal-to-electricity projects in order to obtain fresh air. At the same time, Beijing launched a coal-to-gas conversion project, changing various large coal-fired boilers to burn natural gas for heating. As a result, Beijing's natural gas is seriously insufficient. In addition, the development of society and the improvement of people's living standards have brought about drastic changes in my country's power consumption structure. The peak power is seriously insufficient, the peak-to-valley difference continues to increase, and the low-efficiency operation of generator...

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Problems solved by technology

At the same time, Beijing launched the coal-to-gas project, changing the large-scale coal-fired boilers to burn natural gas for heating, and the result is that Beijing's natural gas is seriously insufficient

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