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Molten-salt single-tank electric heating heat storage heating system and using method

A heating system and electric heating technology, applied in heating methods, heating systems, and central heating, can solve the problems of tank space not being utilized, and achieve the effects of alleviating smog, reducing peak-to-valley differences, and simple structure

Active Publication Date: 2018-01-09
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the double-tank molten salt low-valley electric heating centralized heating system is widely used in the market, which requires each tank to be able to store all the heat storage medium in the system, resulting in a part of the tank space not being used

Method used

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  • Molten-salt single-tank electric heating heat storage heating system and using method
  • Molten-salt single-tank electric heating heat storage heating system and using method
  • Molten-salt single-tank electric heating heat storage heating system and using method

Examples

Experimental program
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Embodiment 1

[0038] Such as figure 1 As shown, the present invention provides a molten salt single-tank electric heating heat storage heating system, including: a molten salt heat storage tank 10, an electric heating device 14, a low-temperature molten salt pump 20, a high-temperature molten salt pump 30, and a molten salt electric heater 40. Power supply 50, heat exchanger and heat user 70. The heat exchanger in this embodiment is a molten salt-water heat exchanger 60. The molten salt-water heat exchanger 60 includes a molten salt side and a water side, and the molten salt side includes The molten salt side inlet and the molten salt side outlet of the molten salt-water heat exchanger 60, the water side includes the water side inlet and the water side outlet of the molten salt-water heat exchanger 60; wherein:

[0039] The molten salt heat storage tank 10 of the present invention is used to store the heat storage medium molten salt, and other heat storage media can also be used to replace ...

Embodiment 2

[0052] Such as figure 2 As shown, the present invention provides a molten salt single-tank electric heating thermal storage heating system, which is similar to Embodiment 1, except that the pipeline connecting the outlet of the molten salt electric heater to the molten salt inlet of the heat exchanger is omitted, and other Structure is identical with embodiment 1. Specifically:

[0053] The molten salt heat storage tank 10 of the present invention is provided with a low-temperature molten salt pump 20 for extracting low-temperature molten salt from the lower part of the molten salt heat storage tank 10 (top). Below, the outlet of the low-temperature molten salt pump 20 is connected to the molten salt inlet of the molten salt electric heater 40, the molten salt outlet of the molten salt electric heater 40 is connected to the high-temperature molten salt inlet 11, and the molten salt electric heater 40 is connected to the power supply 50 The power supply 50 is the "garbage el...

Embodiment 3

[0063] Such as image 3 As shown, the present invention provides a molten salt single-tank electric heating thermal storage heating system, which is similar to Embodiment 1, except that the molten salt-water heat exchanger 60 is replaced by a molten salt-steam heat exchanger 61 connected in series It is connected with the steam-water heat exchanger 62, the molten salt-steam heat exchanger 61 is connected with the third interface of the heating tee pipe 90, the steam-water heat exchanger 62 is connected with the heat user 70, other structures and usage methods are the same as the embodiment 1 is the same. This embodiment adds a heat exchange process, which can reduce the temperature difference of the heat exchanger, increase the service life of the heat exchanger, and is beneficial to the safe operation of the system.

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Abstract

The invention discloses a molten-salt single-tank electric heating heat storage heating system and a using method. The molten-salt single-tank electric heating heat storage heating system comprises amolten salt heat storage tank; a high-temperature molten salt inlet is formed in the upper portion of the molten salt heat storage tank, and a low-temperature molten salt inlet is formed in the lowerportion of the molten salt heat storage tank; a low-temperature molten salt pump and a high-temperature molten salt pump are arranged on the molten salt heat storage tank; an outlet of the low-temperature molten salt pump is connected with a molten salt inlet of a molten salt electric heater, an outlet of the molten salt electric heater is connected with the low-temperature molten salt inlet and amolten salt side inlet of a heat exchanger, and the molten salt electric heater is connected with a power supply; an outlet of the high-temperature molten salt pump is connected with the molten saltside inlet of the heat exchanger, a molten salt side outlet of the heat exchanger is connected with the low-temperature molten salt inlet, and the water side of the heat exchanger is connected with aheat consumer. According to the molten-salt single-tank electric heating heat storage heating system and the using method, molten salt is adopted as a heat storage and heat release medium and is poisonless, harmless, cheap and easy to obtain; heat storage is conducted through off-peak electricity and waste electricity not using wind and light, therefore, the peak and off-peak difference of a powergrid can be significantly decreased, the actual running efficiency of a coal-fired power unit is improved, the power transmission capability of the power grid is enhanced, and the renewable energy source utilization efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of molten salt heating, in particular to a method of using molten salt as a heat storage medium, using low-valley electricity or "garbage electricity" that abandons wind and light to heat molten salt to realize building heating, hot water supply or provide industrial heating. The steam molten salt single-tank electric heating heat storage heating system and its application method. Background technique [0002] In recent years, the smog problem has attracted unprecedented attention, and a large amount of coal for heating in winter is one of the main reasons for the serious smog. To this end, the state has issued a series of coal-to-electricity policies, and the municipal and district finances have also issued corresponding subsidy policies to encourage the society to use electric heating instead of coal-fired heating to alleviate the current smog situation. However, if the electric heating device is used dir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24D11/00
Inventor 鹿院卫崔锡民吴玉庭马重芳
Owner BEIJING UNIV OF TECH
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