CN-122015061-A - Steam supply system for thermal battery

CN122015061ACN 122015061 ACN122015061 ACN 122015061ACN-122015061-A

Abstract

The disclosure provides a steam supply system for a thermal battery, which comprises a high-temperature heat exchange medium storage tank, a high-temperature inlet of a first heat exchanger is connected with an outlet of the high-temperature heat exchange medium storage tank, a low-temperature side is configured to provide energy required by steam, an inlet of the low-temperature heat exchange medium storage tank is communicated with a high-temperature outlet of the first heat exchanger, a heat pump circulation unit comprises a low-temperature inlet of a second heat exchanger and an outlet of the low-temperature heat exchange medium storage tank, the low-temperature outlet is communicated with the high-temperature heat exchange medium storage tank, an inlet of a low-temperature expansion machine is communicated with a high-temperature outlet of the second heat exchanger, an inlet of a high-temperature compression machine is communicated with an outlet of the low-temperature expansion machine, and an outlet of the high-temperature compression machine is communicated with a high-temperature inlet of the second heat exchanger. The heat pump cycle, the power cycle, the steam supply and molten salt heat storage and release unit are integrated, so that the multifunctional coordination of electric heat conversion, heat energy storage, power generation and steam supply is realized, and the heat pump cycle, the power cycle, the steam supply and molten salt heat storage and release unit are suitable for scenes such as power grid peak shaving, industrial waste heat utilization and regional energy supply.

Inventors

SUN SHAN
GAO XUFENG
LIN YINGZHAO
CONG QUN
LI HONGZHI
ZHANG YIFAN
YANG YU

Assignees

西安热工研究院有限公司
华能烟台八角热电有限公司

Dates

Publication Date: 20260512
Application Date: 20260311

Claims (10)

1. A steam supply system for a thermal battery, comprising: a high temperature heat exchange medium storage tank configured to store a high temperature medium; A first heat exchanger, a high temperature inlet of the first heat exchanger being connected to an outlet of the high temperature heat exchange medium storage tank, a low temperature side of the first heat exchanger being configured to provide energy required by steam; A low temperature heat exchange medium storage tank, an inlet of which is communicated with a high temperature outlet of the first heat exchanger, the low temperature heat exchange medium storage tank being configured to store a low temperature medium; A heat pump cycle unit comprising: The low-temperature inlet of the second heat exchanger is communicated with the outlet of the low-temperature heat exchange medium storage tank; The inlet of the low-temperature expansion machine is communicated with the high-temperature outlet of the second heat exchanger; the inlet of the high-temperature compressor is communicated with the outlet of the low-temperature expander, and the outlet of the high-temperature compressor is communicated with the high-temperature inlet of the second heat exchanger.
2. The steam supply system for a thermal battery according to claim 1, wherein the heat pump cycle unit further comprises: the low-temperature inlet of the low-temperature heat exchanger is communicated with the outlet of the low-temperature expander, and the low-temperature outlet of the low-temperature heat exchanger is communicated with the inlet of the high-temperature compressor.
3. A steam supply system for a thermal battery according to claim 1 or 2, further comprising: and one end of the low-temperature side of the power circulation unit is communicated with the low-temperature heat exchange medium storage tank, and the other end of the low-temperature side of the power circulation unit is communicated with the low-temperature inlet of the second heat exchanger.
4. A steam supply system for a thermal battery according to claim 3, wherein the power cycle unit comprises: and one end of the low-temperature side of the third heat exchanger is communicated with the outlet of the high-temperature heat exchange medium storage tank, and the other end of the low-temperature side of the third heat exchanger is communicated with the high-temperature inlet of the first heat exchanger.
5. The steam supply system for a thermal battery of claim 4, wherein the power cycle unit further comprises: the outlet of the compressor is communicated with the high Wen Ceru port of the third heat exchanger; And the outlet of the turbine is communicated with the inlet of the compressor, and the inlet of the turbine is communicated with the high-temperature side outlet of the third heat exchanger.
6. The steam supply system for a thermal battery of claim 5, wherein the power cycle unit further comprises: The high-temperature side of the fourth heat exchanger is arranged between the high-temperature side inlet of the third heat exchanger and the outlet of the compressor, and the low-temperature side of the fourth heat exchanger is arranged between the outlet of the turbine and the inlet of the compressor.
7. The steam supply system for a thermal battery of claim 2, further comprising: the electric heater is respectively communicated with the low-temperature outlet of the second heat exchanger and the outlet of the low-temperature heat exchange medium storage tank, and the outlet of the electric heater is communicated with the inlet of the high-temperature heat exchange medium storage tank.
8. The vapor supply system for a thermal battery of claim 1, further comprising a first valve; The first valve is arranged at the outlet of the low-temperature heat exchange medium storage tank and/or The first valve is arranged at the outlet of the high-temperature heat exchange medium storage tank.
9. The vapor supply system for a thermal battery of claim 7, further comprising: one end of the first pipeline is communicated with the outlet of the low-temperature heat exchange medium storage tank; one end of the second pipeline is communicated with the other end of the first pipeline, and the other end of the second pipeline is communicated with the electric heater; one end of the third pipeline is communicated with the other end of the first pipeline, and the other end of the third pipeline is communicated with the inlet of the high-temperature heat exchange medium storage tank; One end of the fourth pipeline is communicated with one end, far away from the first pipeline, of the second pipeline, and the other end of the fourth pipeline is communicated with a low-temperature outlet of the second heat exchanger; The second valve is arranged at the low-temperature outlet of the second heat exchanger; The third valve is arranged on the second pipeline; The fourth valve is arranged at the outlet of the electric heater; The fifth valve is arranged on the first pipeline; and the sixth valve is arranged on the third pipeline.
10. The vapor supply system for a thermal battery of claim 4, further comprising: one end of the fifth pipeline is communicated with the outlet of the high-temperature heat exchange medium storage tank, and the other end of the fifth pipeline is connected with the low-temperature inlet of the third heat exchanger; One end of the sixth pipeline is communicated with the outlet of the high-temperature heat exchange medium storage tank; a seventh pipeline, wherein one end of the seventh pipeline is communicated with the other end of the sixth pipeline, and the other end of the seventh pipeline is communicated with the high-temperature inlet of the first heat exchanger; one end of the eighth pipeline is communicated with the other end of the sixth pipeline, and the other end of the eighth pipeline is communicated with the inlet of the low-temperature heat exchange medium storage tank; the seventh valve is arranged on the fifth pipeline; The eighth valve is arranged on the seventh pipeline; A ninth valve arranged at the high temperature outlet of the first heat exchanger; a tenth valve arranged on the sixth pipeline; and the eleventh valve is arranged on the eighth pipeline.

Description

Steam supply system for thermal battery Technical Field The present disclosure relates to the field of energy storage and utilization technology, and in particular, to a steam supply system for a thermal battery. Background Renewable power sources such as wind and light have intermittent and fluctuating characteristics, and high-capacity and long-time energy storage technology is needed to stabilize fluctuation. The traditional fused salt heat storage system mostly heats up and stores heat in an electric heating mode, the electric-heat conversion efficiency is low, the energy release side can only realize pure power generation or pure steam supply, and the energy cascade utilization rate is insufficient. The heat pump technology can raise the low-grade environment/industrial waste heat to high temperature, but the high-quality steam requirement is difficult to meet by the heat pump technology alone. Disclosure of Invention It is an object of the present disclosure to provide a steam supply system for a thermal battery, which is capable of solving at least one of the technical problems mentioned above. The specific scheme is as follows: According to a specific embodiment of the disclosure, in one aspect, the disclosure provides a steam supply system for a thermal battery, the steam supply system for a thermal battery comprising a high temperature heat exchange medium storage tank configured to store a high temperature medium, a first heat exchanger having a high temperature inlet connected to an outlet of the high temperature heat exchange medium storage tank, a low temperature side of the first heat exchanger configured to provide energy required for steam, a low temperature heat exchange medium storage tank having an inlet in communication with a high temperature outlet of the first heat exchanger, the low temperature heat exchange medium storage tank configured to store a low temperature medium, a heat pump circulation unit comprising a second heat exchanger having a low temperature inlet in communication with an outlet of the low temperature heat exchange medium storage tank, a low temperature outlet of the second heat exchanger in communication with the high temperature heat exchange medium storage tank, a low temperature expander having an inlet in communication with a high temperature outlet of the second heat exchanger, and a high temperature compressor having an inlet in communication with an outlet of the low temperature compressor. In an alternative embodiment, the heat pump cycle unit further comprises a low temperature heat exchanger, a low temperature inlet of the low temperature heat exchanger is communicated with an outlet of the low temperature expander, and a low temperature outlet of the low temperature heat exchanger is communicated with an inlet of the high temperature compressor. In an alternative embodiment, the steam supply system for a thermal battery further comprises a power circulation unit, wherein one end of the low-temperature side of the power circulation unit is communicated with the low-temperature heat exchange medium storage tank, and the other end of the low-temperature side of the power circulation unit is communicated with the low-temperature inlet of the second heat exchanger. In an alternative embodiment, the power cycle unit comprises a third heat exchanger, one end of the low-temperature side of the third heat exchanger is communicated with the outlet of the high-temperature heat exchange medium storage tank, and the other end of the low-temperature side of the third heat exchanger is communicated with the high-temperature inlet of the first heat exchanger. In an alternative embodiment, the power cycle unit further includes a steam turbine in communication with the high temperature side of the third heat exchanger. In an alternative embodiment, the steam turbine comprises a compressor, an outlet of which is communicated with a high Wen Ceru port of the third heat exchanger, and a turbine, an outlet of which is communicated with an inlet of the compressor, and an inlet of which is communicated with a high-temperature side outlet of the third heat exchanger. In an alternative embodiment, the steam turbine further comprises a fourth heat exchanger, the high temperature side of the fourth heat exchanger is arranged between the high temperature side inlet of the third heat exchanger and the outlet of the compressor, and the low temperature side of the fourth heat exchanger is arranged between the outlet of the turbine and the inlet of the compressor. In an alternative embodiment, the power cycle unit further includes a condenser disposed between the outlet of the turbine and the inlet of the compressor. In an alternative embodiment, the steam supply system for the thermal battery further comprises an electric heater, wherein the electric heater is respectively communicated with the low-temperature outlet of the second heat exchanger and the outlet of the low-temperature