CN217813623U - Fused salt heat storage and release system based on thermal power generating unit - Google Patents
Fused salt heat storage and release system based on thermal power generating unit Download PDFInfo
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- CN217813623U CN217813623U CN202221961808.2U CN202221961808U CN217813623U CN 217813623 U CN217813623 U CN 217813623U CN 202221961808 U CN202221961808 U CN 202221961808U CN 217813623 U CN217813623 U CN 217813623U
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Abstract
The utility model provides a fused salt stores thermal system based on thermal power generating unit includes: the system comprises a low-temperature molten salt tank, a high-temperature molten salt tank, a first heat exchanger, a second heat exchanger and a pressure matcher; the steam inlet end of the pressure matcher is connected with the steam outlet end of the hot side of the first heat exchanger, the steam outlet end of the pressure matcher is connected with the steam inlet end of the reheated steam of the thermal power unit, and the injection end of the pressure matcher is connected with the steam outlet end of the main steam of the thermal power unit. In the fused salt heat storage and release system based on the thermal power generating unit, the flexible operation interval of the electric load of the thermal power generating unit is increased, and the peak regulation capacity of the thermal power generating unit is effectively improved, so that the thermal power generating unit can meet the power consumption requirements of no use, the power generation cost of the thermal power generating unit is effectively reduced, and the power generation benefit of the thermal power generating unit is further improved.
Description
Technical Field
The utility model relates to a thermal power unit technical field especially relates to a fused salt stores thermal system based on thermal power unit.
Background
In recent years, the scale and specific gravity of renewable energy power generation such as wind power and photovoltaic are greatly improved. However, renewable energy has the characteristics of volatility, intermittence and the like, and after the renewable energy is connected to a power grid, the capability of adding auxiliary services such as peak shaving and peak peaking of a conventional thermal power generating unit is still needed, and the thermal power generating unit is still in the dominant position of power generation.
Because the difference of power consumption demand, and consider the cost of electricity generation, consequently, this disclosure provides a fused salt stores thermal system based on thermal power unit to improve thermal power unit's peak regulation ability.
Disclosure of Invention
The present disclosure is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the fused salt heat storage and release system based on the thermal power generating unit is provided.
In order to achieve the above object, the present disclosure provides a fused salt heat storage and release system based on a thermal power generating unit, including: the system comprises a low-temperature molten salt tank, a high-temperature molten salt tank, a first heat exchanger, a second heat exchanger and a pressure matcher; the hot side steam inlet end of the first heat exchanger is connected with the reheated steam outlet end of the thermal power generating unit, the cold side liquid inlet end of the first heat exchanger is connected with the liquid outlet end of the low-temperature molten salt tank, and the cold side liquid outlet end of the first heat exchanger is connected with the liquid inlet end of the high-temperature molten salt tank; the hot side liquid inlet end of the second heat exchanger is connected with the liquid outlet end of the high-temperature molten salt tank, the hot side liquid outlet end of the second heat exchanger is connected with the liquid inlet end of the low-temperature molten salt tank, the cold side steam inlet end of the second heat exchanger is connected with the steam outlet end of the high-pressure cylinder of the thermal power generating unit, and the cold side steam outlet end of the second heat exchanger is connected with the steam inlet end of the medium-pressure cylinder of the thermal power generating unit; the steam inlet end of the pressure matcher is connected with the steam outlet end of the hot side of the first heat exchanger, the steam outlet end of the pressure matcher is connected with the steam inlet end of the reheat steam of the thermal power generating unit, and the injection end of the pressure matcher is connected with the steam outlet end of the main steam of the thermal power generating unit.
Optionally, the thermal power generating unit includes: the main steam outlet end of the boiler is connected with the injection end of the pressure matcher, the reheat steam inlet end of the boiler is connected with the steam outlet end of the pressure matcher, and the reheat steam outlet end of the boiler is connected with the hot side steam inlet end of the first heat exchanger; the steam inlet end of the high-pressure cylinder is connected with the main steam outlet end of the boiler, and the steam outlet end of the high-pressure cylinder is connected with the reheat steam inlet end of the boiler and the cold side steam inlet end of the second heat exchanger; the steam inlet end of the intermediate pressure cylinder is connected with the reheated steam outlet end of the boiler and the cold side steam outlet end of the second heat exchanger; and the steam inlet end of the low pressure cylinder is connected with the steam outlet end of the medium pressure cylinder.
Optionally, the thermal power generating unit further includes: the hot side steam inlet end of the condenser is connected with the steam outlet end of the low pressure cylinder, and cooling water is introduced into the cold side of the condenser; and the liquid inlet end of the deaerator is connected with the liquid outlet end of the hot side of the condenser, and the liquid outlet end of the deaerator is connected with the liquid inlet end of the main steam of the boiler.
Optionally, the thermal power generating unit further includes: the hot side steam inlet end of the high-pressure heater is connected with the steam outlet end of the high-pressure cylinder and the steam outlet end of the medium-pressure cylinder, the hot side steam outlet end of the high-pressure heater is connected with the steam inlet end of the deaerator, the cold side of the high-pressure heater is arranged between the liquid outlet end of the deaerator and the main steam liquid inlet end of the boiler, the cold side liquid inlet end of the high-pressure heater is connected with the liquid outlet end of the deaerator, and the cold side liquid outlet end of the high-pressure heater is connected with the main steam liquid inlet end of the boiler; low pressure feed water heater, low pressure feed water heater's hot side steam inlet end with the steam outlet end of intermediate pressure jar reaches the steam outlet end of low pressure jar links to each other, low pressure feed water heater's hot side steam outlet end with the hot side feed liquor end of condenser links to each other, low pressure feed water heater's cold side sets up the feed liquor end of oxygen-eliminating device with the hot side of condenser goes out between the liquid end links to each other, low pressure feed water heater's feed liquor cold side end with the hot side of condenser goes out the liquid end and links to each other, low pressure feed water heater's cold side goes out the liquid end with the feed liquor end of oxygen-eliminating device links to each other.
Optionally, the thermal power generating unit further includes: the deoxygenation water pump is arranged between the liquid inlet end of the cold side of the high-pressure heater and the liquid outlet end of the deoxygenator, the liquid inlet end of the deoxygenation water pump is connected with the liquid outlet end of the deoxygenator, and the liquid outlet end of the deoxygenation water pump is connected with the liquid inlet end of the cold side of the high-pressure heater; and the condensate pump is arranged between the cold side liquid inlet end of the low-pressure heater and the hot side liquid outlet end of the condenser, the liquid inlet end of the condensate pump is connected with the hot side liquid outlet end of the condenser, and the liquid outlet end of the condensate pump is connected with the cold side liquid inlet end of the low-pressure heater.
Optionally, the molten salt heat storage and release system further comprises: the first valve is arranged between the steam outlet end of the main steam of the boiler and the injection end of the pressure matcher; the second valve is arranged between the steam inlet end of the high-pressure cylinder and the steam outlet end of the main steam of the boiler; the third valve is arranged between the steam outlet end of the reheated steam of the boiler and the steam inlet end of the hot side of the first heat exchanger; the fourth valve is arranged between the steam inlet end of the intermediate pressure cylinder and the steam outlet end of the reheat steam of the boiler; and the fifth valve is arranged between the steam inlet end of the intermediate pressure cylinder and the cold side steam outlet end of the second heat exchanger in a connected manner.
Optionally, the molten salt heat storage and release system further comprises: the sixth valve is arranged between the reheating steam inlet end of the boiler and the steam outlet end of the pressure matcher; and the seventh valve is arranged between the steam outlet end of the high-pressure cylinder and the cold-side steam inlet end of the second heat exchanger.
Optionally, the molten salt heat storage and release system further comprises: and the steam inlet end of the water spray desuperheater is connected with the steam outlet end of the high-pressure cylinder, the steam outlet end of the water spray desuperheater is connected with the cold side steam inlet end of the second heat exchanger, and the water spraying end of the water spray desuperheater is connected with the liquid outlet end of the deaerator of the thermal power generating unit.
Optionally, the molten salt heat storage and release system further comprises: and the eighth valve is arranged between the water spraying end of the water spraying desuperheater and the liquid outlet end of the deaerator of the thermal power generating unit.
Optionally, the molten salt heat storage and release system further comprises: the ninth valve is arranged between the cold side liquid inlet end of the first heat exchanger and the liquid outlet end of the low-temperature molten salt tank; the tenth valve is arranged between the liquid inlet end at the hot side of the second heat exchanger and the liquid outlet end of the high-temperature molten salt tank; the cryogenic pump is arranged between a cold side liquid inlet end of the first heat exchanger and a liquid outlet end of the low-temperature molten salt tank, a liquid inlet end of the cryogenic pump is connected with a liquid outlet end of the low-temperature molten salt tank, and a liquid outlet end of the cryogenic pump is connected with a cold side liquid inlet end of the first heat exchanger; the high-temperature pump is arranged between the hot side liquid inlet end of the second heat exchanger and the liquid outlet end of the high-temperature molten salt tank, the liquid inlet end of the high-temperature pump is connected with the liquid outlet end of the high-temperature molten salt tank, and the liquid outlet end of the high-temperature pump is connected with the hot side liquid inlet end of the second heat exchanger.
The technical scheme provided by the disclosure can comprise the following beneficial effects:
the heat of the thermal power generating unit is stored in a mode of absorbing heat through the fused salt when the power demand is small, the heat of the fused salt is released to the thermal power generating unit in a mode of releasing heat through the fused salt when the power demand is large, therefore, the flexible operation interval of the electric load of the thermal power generating unit is increased, the peak regulation capacity of the thermal power generating unit is effectively improved, the power demand of the thermal power generating unit can be met, the power generation cost of the thermal power generating unit is effectively reduced, and the power generation benefit of the thermal power generating unit is improved.
Additional aspects and advantages of the disclosure will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the disclosure.
Drawings
The foregoing and/or additional aspects and advantages of the present disclosure will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a fused salt heat storage and release system based on a thermal power generating unit according to an embodiment of the disclosure;
fig. 2 is a schematic structural diagram of a fused salt heat storage and release system based on a thermal power generating unit according to an embodiment of the disclosure;
fig. 3 is a schematic structural diagram of a fused salt heat storage and release system based on a thermal power generating unit according to an embodiment of the disclosure;
as shown in the figure: 1. the system comprises a low-temperature molten salt tank, 2, a high-temperature molten salt tank, 3, a first heat exchanger, 4, a second heat exchanger, 5, a pressure matcher, 6, a boiler, 7, a high-pressure cylinder, 8, a medium-pressure cylinder, 9, a high-pressure heater, 10, an oxygen-removing water pump, 11, a water spray desuperheater, 12, a low-temperature pump, 13, a high-temperature pump, 14, a first valve, 15, a second valve, 16, a third valve, 17, a fourth valve, 18, a fifth valve, 19, a sixth valve, 20, a seventh valve, 21, an eighth valve, 22, a ninth valve, 23 and a tenth valve.
Detailed Description
Reference will now be made in detail to the embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of illustrating the present disclosure and should not be construed as limiting the same. On the contrary, the embodiments of the disclosure include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
As shown in fig. 1, 2, and 3, the embodiment of the present disclosure provides a fused salt heat storage and release system based on a thermal power generating unit, including a low-temperature fused salt tank 1, a high-temperature fused salt tank 2, a first heat exchanger 3, a second heat exchanger 4, and a pressure matcher 5, a hot-side steam inlet end of the first heat exchanger 3 is connected to a reheated steam outlet end of the thermal power generating unit, a cold-side liquid inlet end of the first heat exchanger 3 is connected to a liquid outlet end of the low-temperature fused salt tank 1, a cold-side liquid outlet end of the first heat exchanger 3 is connected to a liquid inlet end of the high-temperature fused salt tank 2, a hot-side liquid inlet end of the second heat exchanger 4 is connected to a liquid outlet end of the high-temperature fused salt tank 2, a hot-side liquid outlet end of the second heat exchanger 4 is connected to a liquid inlet end of the low-temperature fused salt tank 1, a cold-side steam inlet end of the second heat exchanger 4 is connected to a steam outlet end of a high-pressure cylinder 7 of the thermal power generating unit, a cold-side steam outlet end of the second heat exchanger 4 is connected to a steam inlet end 8 of the thermal power generating unit, a hot-side steam outlet end of the pressure matcher 5 is connected to a reheated steam outlet end of the thermal power generating unit, and a main steam outlet end of the thermal power generating unit is connected to a main steam matcher.
It can be understood that, as shown in fig. 1 and fig. 2, when the power consumption requirement is low, part of reheated steam of the thermal power generating unit returns to the thermal power generating unit again after sequentially passing through the hot side of the first heat exchanger 3 and the pressure matcher 5 for reheating, low-temperature molten salt in the low-temperature molten salt tank 1 enters the high-temperature molten salt tank 2 after passing through the cold side of the first heat exchanger 3, and part of main steam of the thermal power generating unit enters the pressure matcher 5. From this, the reheat steam through 3 hot sides of first heat exchanger will become high temperature fused salt through the low temperature fused salt heating of 3 cold sides of first heat exchanger, reheat steam after the cooling mixes with thermal power unit's partial main steam when passing through pressure matcher 5, so that reheat steam after the cooling intensifies and steps up, and make thermal power unit's partial main steam cooling step-down, thereby not only make full use of thermal power unit's main steam and reheat steam carry out the fused salt energy storage, but also reduced thermal power unit's acting steam volume, thermal power unit's the depth of adjusting peak has effectively been increased.
As shown in fig. 1 and fig. 3, when the power demand is large, all of the main steam and the reheated steam of the thermal power generating unit are used for acting to generate power, part of the steam at the steam outlet end of the high-pressure cylinder 7 passes through the cold side of the second heat exchanger 4 and then enters the intermediate-pressure cylinder 8, and the high-temperature molten salt in the high-temperature molten salt tank 2 passes through the hot side of the second heat exchanger 4 and then enters the low-temperature molten salt tank 1. Therefore, the high-temperature molten salt passing through the hot side of the second heat exchanger 4 heats the steam passing through the cold side of the first heat exchanger 3, and the heated steam enters the intermediate pressure cylinder 8 to do work, so that the work steam quantity of the thermal power generating unit is increased by using the heat in the molten salt, and the peak power generating capacity of the thermal power generating unit is effectively improved.
The heat of the thermal power generating unit is stored in a mode of absorbing heat through the fused salt when the power demand is small, the heat of the fused salt is released to the thermal power generating unit in a mode of releasing heat through the fused salt when the power demand is large, therefore, the flexible operation interval of the electric load of the thermal power generating unit is increased, the peak regulation capacity of the thermal power generating unit is effectively improved, the power demand of the thermal power generating unit can be met, the power generation cost of the thermal power generating unit is effectively reduced, and the power generation benefit of the thermal power generating unit is improved.
It should be noted that, the pressure matcher 5 is also called a steam ejector, a steam jet heat pump, etc., and the steam inlet end of the pressure matcher 5 is introduced with steam with lower pressure, for example: reheat steam after cooling in first heat exchanger 3, pressure matcher 5 draws the end to inject and lets in the higher steam of pressure, for example: the main steam and the steam outlet end of the pressure adapter 5 discharge steam with medium pressure, such as: the steam pressure of the steam outlet end of the pressure matcher 5 is smaller than the steam pressure of the injection end of the pressure matcher 5 but is larger than the steam of the steam inlet end of the pressure matcher 5.
Low temperature molten salt jar 1 is used for storing low temperature fused salt, and high temperature molten salt jar 2 is used for storing high temperature fused salt, and specific size, shape etc. of low temperature molten salt jar 1 and high temperature molten salt jar 2 can set up according to actual need, do not do the restriction here, and simultaneously, the specific type of fused salt also can set up according to actual need, do not do the restriction here.
As shown in fig. 1, 2 and 3, in some embodiments, the thermal power generating unit includes a boiler 6, a high pressure cylinder 7, an intermediate pressure cylinder 8 and a low pressure cylinder, a main steam outlet of the boiler 6 is connected to an injection end of the pressure adapter 5, a reheat steam inlet of the boiler 6 is connected to a steam outlet of the pressure adapter 5, the reheat steam outlet of the boiler 6 is connected to a hot side steam inlet of the first heat exchanger 3, a steam inlet of the high pressure cylinder 7 is connected to a main steam outlet of the boiler 6, a steam outlet of the high pressure cylinder 7 is connected to a reheat steam inlet of the boiler 6 and a cold side steam inlet of the second heat exchanger 4, a steam inlet of the intermediate pressure cylinder 8 is connected to a reheat steam outlet of the boiler 6 and a cold side steam outlet of the second heat exchanger 4, and a steam inlet of the low pressure cylinder is connected to a steam outlet of the intermediate pressure cylinder 8.
It can be understood that, as shown in fig. 1 and fig. 2, when the power demand is small, part of the reheated steam of the boiler 6 enters the intermediate pressure cylinder 8 to do work and generate power, the rest of the reheated steam returns to the boiler 6 again after sequentially passing through the hot side of the first heat exchanger 3 and the pressure matcher 5 to be reheated, the low-temperature molten salt in the low-temperature molten salt tank 1 enters the high-temperature molten salt tank 2 after passing through the cold side of the first heat exchanger 3, part of the main steam of the boiler 6 enters the high-pressure cylinder 7 to do work and generate power, and the rest of the main steam enters the pressure matcher 5. From this, the reheat steam through 3 hot sides of first heat exchanger will become high temperature fused salt through the low temperature fused salt heating of 3 cold sides of first heat exchanger, reheat steam after the cooling mixes with main steam when passing through pressure matcher 5, so that reheat steam after the cooling intensifies and steps up, and make main steam cooling step-down, thereby main steam and reheat steam that not only make full use of boiler 6 carry out the fused salt energy storage, but also reduced thermal power unit's acting steam volume, thermal power unit's peak regulation degree of depth has effectively been increased.
As shown in fig. 1 and 3, when the power demand is large, all of the main steam and the reheat steam of the boiler 6 are used for power generation, part of the steam at the steam outlet end of the high-pressure cylinder 7 enters the boiler 6 for reheating, the rest of the steam enters the intermediate pressure cylinder 8 after passing through the cold side of the second heat exchanger 4, and the high-temperature molten salt in the high-temperature molten salt tank 2 enters the low-temperature molten salt tank 1 after passing through the hot side of the second heat exchanger 4. Therefore, the high-temperature molten salt passing through the hot side of the second heat exchanger 4 heats the steam passing through the cold side of the first heat exchanger 3, and the heated steam enters the intermediate pressure cylinder 8 to do work, so that the work steam quantity of the thermal power generating unit is increased by using the heat in the molten salt, and the peak power generating capacity of the thermal power generating unit is effectively improved.
The thermal power generating unit further comprises a generator, main steam of the boiler 6 enters the high-pressure cylinder 7, steam in the high-pressure cylinder 7 enters the boiler 6 for reheating, the reheated steam and steam heated by high-temperature molten salt in the second heat exchanger 4 enter the intermediate pressure cylinder 8, steam in the intermediate pressure cylinder 8 enters the low-pressure cylinder, and the steam in the high-pressure cylinder 7, the intermediate pressure cylinder 8 and the low-pressure cylinder drives the generator to generate electricity.
In some embodiments, the thermal power generating unit further comprises a condenser and a deaerator, a hot side steam inlet end of the condenser is connected with a steam outlet end of the low-pressure cylinder, cooling water is introduced into a cold side of the condenser, a liquid inlet end of the deaerator is connected with a hot side liquid outlet end of the condenser, and a liquid outlet end of the deaerator is connected with a main steam liquid inlet end of the boiler 6.
It can be understood that, steam after doing work in the low pressure jar enters the oxygen-eliminating device behind the hot side of condenser, the cooling water passes through the cold side of condenser, therefore, the cooling water through the condenser cold side will pass through the steam cooling of condenser hot side, make the steam condensation behind the work in the low pressure jar become the condensate water, the condensate water carries out the deoxidization and forms the oxygen-eliminating water when passing through the oxygen-eliminating device, the oxygen-eliminating water heats into main steam in entering boiler 6, thereby recycling, in order to reduce the generating cost of thermal power unit, improve thermal power unit's power generation benefit, and simultaneously, deoxidization through the oxygen-eliminating device, in order to reduce the oxygen content in the condensate water, thereby reduce pipeline in the thermal power unit, the corruption that equipment etc. received, effectively prolong thermal power unit's life.
As shown in fig. 1, 2 and 3, in some embodiments, the thermal power generating unit further includes a high-pressure heater 9 and a low-pressure heater (not shown in the figure), a hot-side steam inlet end of the high-pressure heater 9 is connected to a steam outlet end of the high-pressure cylinder 7 and a steam outlet end of the intermediate pressure cylinder 8, a hot-side steam outlet end of the high-pressure heater 9 is connected to a steam inlet end of the deaerator, a cold side of the high-pressure heater 9 is disposed between a steam outlet end of the deaerator and a main steam inlet end of the boiler 6, a cold-side steam inlet end of the high-pressure heater 9 is connected to a steam outlet end of the intermediate pressure cylinder 8 and a steam outlet end of the low-pressure cylinder 6, a cold-side steam outlet end of the low-pressure heater is connected to a steam inlet end of the deaerator, a cold side of the low-pressure heater is disposed between a steam inlet end of the deaerator and a hot-side steam outlet end of the condenser, a hot-side steam inlet end of the low-pressure heater is connected to a liquid outlet end of the cold-side condenser, and a cold-side steam inlet end of the low-pressure heater is connected to a liquid outlet end of the cold-side condenser.
It can be understood that the partial steam after acting in the high-pressure cylinder 7 and the partial steam after acting in the intermediate-pressure cylinder 8 pass through the hot side of the high-pressure heater 9 and then enter the deaerator, and the deaerated water at the liquid outlet end of the deaerator passes through the cold side of the high-pressure heater 9 and then enters the boiler 6. From this, the steam through the 9 hot sides of high pressure feed water heater will pass through the heating of the deoxygenated water of 9 cold sides of high pressure feed water heater to reduced the energy loss of boiler 6, reduced thermal power unit's generating cost, but also reduced the heat time of deoxygenated water, improved thermal power unit's generating efficiency.
And part of steam doing work in the intermediate pressure cylinder 8 and part of steam doing work in the low pressure cylinder enter the condenser after passing through the hot side of the low pressure heater, and condensed water at the liquid outlet end of the condenser enters the deaerator after passing through the cold side of the low pressure heater. Therefore, steam passing through the hot side of the low-pressure heater heats condensed water passing through the cold side of the low-pressure heater, so that the heating time of deoxygenated water is shortened, and the power generation efficiency of the thermal power generating unit is improved.
As shown in fig. 1, fig. 2, and fig. 3, in some embodiments, the thermal power generating unit further includes a deoxygenation water pump 10 and a condensate pump (not shown in the figure), the deoxygenation water pump 10 is disposed between a cold-side liquid inlet end of the high-pressure heater 9 and a liquid outlet end of the deoxygenation device, a liquid inlet end of the deoxygenation water pump 10 is connected to a liquid outlet end of the deoxygenation device, a liquid outlet end of the deoxygenation water pump 10 is connected to a cold-side liquid inlet end of the high-pressure heater 9, the condensate pump is disposed between a cold-side liquid inlet end of the low-pressure heater and a hot-side liquid outlet end of the condenser, a liquid inlet end of the condensate pump is connected to a hot-side liquid outlet end of the condenser, and a liquid outlet end of the condensate pump is connected to a cold-side liquid inlet end of the low-pressure heater.
It can be understood that deoxidization water pump 10 carries the deoxidization water pressure boost of the play liquid end of oxygen-eliminating device to the cold side of high pressure feed water heater 9, guarantees that the deoxidization water can stably enter into boiler 6 and recycles, and condensate pump carries the condensate water pressure boost of the play liquid end of condenser to the cold side of low pressure feed water heater, guarantees that the condensate water can stably enter into the oxygen-eliminating device, guarantees the stable circulation of deoxidization and deoxidization water of condensate water.
As shown in fig. 1, in some embodiments, the molten salt heat storage and release system further includes a first valve 14, a second valve 15, a third valve 16, a fourth valve 17 and a fifth valve 18, the first valve 14 is disposed between the main steam outlet of the boiler 6 and the leading end of the pressure matching device 5, the second valve 15 is disposed between the steam inlet of the high pressure cylinder 7 and the main steam outlet of the boiler 6, the third valve 16 is disposed between the reheat steam outlet of the boiler 6 and the hot side steam inlet of the first heat exchanger 3, the fourth valve 17 is disposed between the steam inlet of the intermediate pressure cylinder 8 and the reheat steam outlet of the boiler 6, and the fifth valve 18 is disposed between the steam inlet of the intermediate pressure cylinder 8 and the cold side steam outlet of the second heat exchanger 4.
It can be understood that through the arrangement of the first valve 14 and the second valve 15, not only is the switching of the thermal power generating unit between the deep peak regulation and the peak regulation facilitated, but also the distribution proportion of the main steam between the pressure matcher 5 and the high-pressure cylinder 7 is facilitated to be controlled, so that the flexibility of the peak regulation of the thermal power generating unit is higher; through the arrangement of the third valve 16 and the fourth valve 17, the switching between the deep peak regulation and the peak regulation of the thermal power generating unit is facilitated, the distribution proportion of the reheated steam between the first heat exchanger 3 and the intermediate pressure cylinder 8 is also conveniently controlled, and the peak regulation flexibility of the thermal power generating unit is higher; through the setting of fifth valve 18, not only be convenient for the switching of thermal power unit between degree of depth peak regulation and crest, be convenient for control the steam volume of second heat exchanger 4 to intermediate pressure jar 8 moreover, make the peak regulation flexibility of thermal power unit higher.
As shown in fig. 1, in some embodiments, the molten salt storage and discharge heat system further includes a sixth valve 19 and a seventh valve 20, the sixth valve 19 is disposed between the inlet of the reheat steam of the boiler 6 and the outlet of the pressure adapter 5, and the seventh valve 20 is disposed between the outlet of the high pressure cylinder 7 and the inlet of the cold side of the second heat exchanger 4.
It can be understood that the sixth valve 19 is arranged, so that the switching of the thermal power generating unit between the deep peak regulation and the peak regulation is facilitated, the steam quantity from the pressure matcher 5 to the main steam inlet end of the boiler 6 is conveniently controlled, and the flexibility of the peak regulation of the thermal power generating unit is higher; through the setting of seventh valve 20, not only be convenient for the thermal power generating unit in the switching between degree of depth peak regulation and crest, be convenient for moreover control high pressure cylinder 7 to the steam volume of second heat exchanger 4, make thermal power generating unit's peak regulation flexibility higher.
As shown in fig. 1 and 3, in some embodiments, the molten salt heat storage and release system further includes a water spray desuperheater 11, a steam inlet end of the water spray desuperheater 11 is connected with a steam outlet end of the high-pressure cylinder 7, a steam outlet end of the water spray desuperheater 11 is connected with a cold-side steam inlet end of the second heat exchanger 4, and a water spray end of the water spray desuperheater 11 is connected with a water outlet end of a deaerator of the thermal power generating unit.
It can be understood that part of the steam after working in the high-pressure cylinder 7 enters the cold side of the second heat exchanger 4 after passing through the water spray desuperheater 11, and part of the deoxygenated water is sprayed into the water spray desuperheater 11 from the water spray end of the water spray desuperheater 11. From this, the steam that gets into water spray desuperheater 11 mixes with the oxygen-removed water that sprays into water spray desuperheater 11, so that the steam that gets into water spray desuperheater 11 cools down, thereby improve the difference in temperature of 4 hot sides of second heat exchanger and cold side, guarantee that the heat exchange efficiency of second heat exchanger 4 and the abundant of high temperature fused salt are exothermic, and simultaneously, also reduced the heating loss of boiler 6 to the oxygen-removed water, the power generation cost of thermal power unit has effectively been reduced, the power generation benefit of thermal power unit has been improved.
It should be noted that high-temperature steam is introduced into the steam inlet end of the water spray desuperheater 11, for example: cooling water is introduced into the water spraying end of the water spraying desuperheater 11 of part of steam after doing work in the high-pressure cylinder 7, for example: the oxygen-free water, cooling water spout into among the water spray desuperheater 11 and atomize into water vapor, and the high-temperature steam in water vapor and the water spray desuperheater 11 mixes, realizes the cooling to high-temperature steam, and 11 play steam end discharge steam after the cooling of water spray desuperheater, for example: the temperature of the steam at the steam outlet end of the water spray desuperheater 11 of the steam at the cold side of the second heat exchanger 4 is lower than the temperature of the steam at the steam inlet end of the water spray desuperheater 11, but is higher than the temperature of the cooling water at the water spray end of the water spray desuperheater 11.
In some embodiments, as shown in fig. 1, the molten salt heat storage and release system further includes an eighth valve 21, and the eighth valve 21 is disposed between the water spraying end of the water spraying desuperheater 11 and the liquid outlet end of the oxygen remover of the thermal power generating unit.
It can be understood that, through the setting of the eighth valve 21, not only the switching of the thermal power generating unit between the deep peak regulation and the peak regulation is facilitated, but also the distribution proportion of the deoxygenated water between the boiler 6 and the water spray desuperheater 11 is facilitated to be controlled, so that the peak regulation flexibility of the thermal power generating unit is higher.
As shown in fig. 1, in some embodiments, the molten salt heat storage and release system further includes a ninth valve 22, a tenth valve 23, a cryogenic pump 12, and a high temperature pump 13, the ninth valve 22 is disposed between a cold-side liquid inlet end of the first heat exchanger 3 and a liquid outlet end of the low temperature molten salt tank 1, the tenth valve 23 is disposed between a hot-side liquid inlet end of the second heat exchanger 4 and a liquid outlet end of the high temperature molten salt tank 2, the cryogenic pump 12 is disposed between a cold-side liquid inlet end of the first heat exchanger 3 and a liquid outlet end of the low temperature molten salt tank 1, a liquid inlet end of the cryogenic pump 12 is connected to the liquid outlet end of the low temperature molten salt tank 1, a liquid outlet end of the cryogenic pump 12 is connected to a cold-side liquid inlet end of the first heat exchanger 3, the high temperature pump 13 is disposed between a liquid inlet end of the second heat exchanger 4 and a liquid outlet end of the high temperature molten salt tank 2, a liquid inlet end of the high temperature pump 13 is connected to the liquid outlet end of the high temperature molten salt tank 2, and a hot-side liquid outlet end of the high temperature pump 13 is connected to a liquid inlet end of the second heat exchanger 4.
It can be understood that the ninth valve 22 and the tenth valve 23 are arranged, so that the switching of the thermal power generating unit between the deep peak regulation and the peak regulation is facilitated, the fused salt amount between the low-temperature fused salt tank 1 and the high-temperature fused salt tank 2 is conveniently controlled, and the peak regulation flexibility of the thermal power generating unit is higher; the cryopump 12 carries the low temperature fused salt pressure boost in the low temperature fused salt jar 1 to the cold side of first heat exchanger 3, and the high temperature pump 13 carries the high temperature fused salt pressure boost of high temperature fused salt pump to the hot side of second heat exchanger 4 to make fused salt can stable cycle between low temperature fused salt jar 1 and high temperature fused salt jar 2, guarantee the nimble peak regulation of thermal power unit.
It should be noted that the first valve 14, the second valve 15, the third valve 16, the fourth valve 17, the fifth valve 18, the sixth valve 19, the seventh valve 20, the eighth valve 21, the ninth valve 22, and the tenth valve 23 may be manual valves or electric valves, and when the first valve 14, the second valve 15, the third valve 16, the fourth valve 17, the fifth valve 18, the sixth valve 19, the seventh valve 20, the eighth valve 21, the ninth valve 22, and the tenth valve 23 are all electric valves, the first valve 14, the second valve 15, the third valve 16, the fourth valve 17, the fifth valve 18, the sixth valve 19, the seventh valve 20, the eighth valve 21, the ninth valve 22, and the tenth valve 23 are controlled by the controller.
As shown in fig. 1 and fig. 2, when the power consumption demand is small, the thermal power generating unit needs deep peak regulation, the controller controls the first valve 14, the second valve 15, the third valve 16, the fourth valve 17, the sixth valve 19 and the ninth valve 22 to be opened, and controls the fifth valve 18, the seventh valve 20, the eighth valve 21 and the tenth valve 23 to be closed, so that the low-temperature molten salt is stored with heat, and meanwhile, the controller can also control the opening degrees of the first valve 14, the second valve 15, the third valve 16, the fourth valve 17, the sixth valve 19 and the ninth valve 22 to meet different demands;
as shown in fig. 1 and 3, when the power demand is large, the thermal power generating unit needs to generate power at the peak, the controller controls the second valve 15, the fourth valve 17, the fifth valve 18, the seventh valve 20, the eighth valve 21 and the tenth valve 23 to be opened, and controls the first valve 14, the third valve 16, the sixth valve 19 and the ninth valve 22 to be closed, so that the high-temperature molten salt releases heat, and meanwhile, the controller can also control the opening degrees of the second valve 15, the fourth valve 17, the fifth valve 18, the seventh valve 20, the eighth valve 21 and the tenth valve 23 to meet different demands.
It should be noted that, in the description of the present disclosure, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present disclosure, the meaning of "a plurality" is two or more unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present disclosure includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present disclosure.
In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure, and that changes, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present disclosure.
Claims (10)
1. The utility model provides a fused salt stores hot system based on thermal power generating unit which characterized in that includes: the system comprises a low-temperature molten salt tank, a high-temperature molten salt tank, a first heat exchanger, a second heat exchanger and a pressure matcher;
the hot side steam inlet end of the first heat exchanger is connected with the reheated steam outlet end of the thermal power generating unit, the cold side liquid inlet end of the first heat exchanger is connected with the liquid outlet end of the low-temperature molten salt tank, and the cold side liquid outlet end of the first heat exchanger is connected with the liquid inlet end of the high-temperature molten salt tank;
a hot side liquid inlet end of the second heat exchanger is connected with a liquid outlet end of the high-temperature molten salt tank, a hot side liquid outlet end of the second heat exchanger is connected with a liquid inlet end of the low-temperature molten salt tank, a cold side steam inlet end of the second heat exchanger is connected with a steam outlet end of a high-pressure cylinder of the thermal power generating unit, and a cold side steam outlet end of the second heat exchanger is connected with a steam inlet end of a medium-pressure cylinder of the thermal power generating unit;
the steam inlet end of the pressure matcher is connected with the steam outlet end of the hot side of the first heat exchanger, the steam outlet end of the pressure matcher is connected with the steam inlet end of the reheated steam of the thermal power unit, and the injection end of the pressure matcher is connected with the steam outlet end of the main steam of the thermal power unit.
2. The fused salt heat storage and release system based on the thermal power generating unit as claimed in claim 1, wherein the thermal power generating unit comprises:
the main steam outlet end of the boiler is connected with the injection end of the pressure matcher, the reheat steam inlet end of the boiler is connected with the steam outlet end of the pressure matcher, and the reheat steam outlet end of the boiler is connected with the hot side steam inlet end of the first heat exchanger;
the steam inlet end of the high-pressure cylinder is connected with the main steam outlet end of the boiler, and the steam outlet end of the high-pressure cylinder is connected with the reheat steam inlet end of the boiler and the cold side steam inlet end of the second heat exchanger;
the steam inlet end of the intermediate pressure cylinder is connected with the reheated steam outlet end of the boiler and the cold side steam outlet end of the second heat exchanger;
and the steam inlet end of the low pressure cylinder is connected with the steam outlet end of the medium pressure cylinder.
3. The fused salt heat storage and release system based on the thermal power generating unit as claimed in claim 2, wherein the thermal power generating unit further comprises:
the hot side steam inlet end of the condenser is connected with the steam outlet end of the low pressure cylinder, and cooling water is introduced into the cold side of the condenser;
and the liquid inlet end of the deaerator is connected with the liquid outlet end of the hot side of the condenser, and the liquid outlet end of the deaerator is connected with the liquid inlet end of the main steam of the boiler.
4. The fused salt heat storage and release system based on the thermal power generating unit as claimed in claim 3, wherein the thermal power generating unit further comprises:
the hot side steam inlet end of the high-pressure heater is connected with the steam outlet end of the high-pressure cylinder and the steam outlet end of the medium-pressure cylinder, the hot side steam outlet end of the high-pressure heater is connected with the steam inlet end of the deaerator, the cold side of the high-pressure heater is arranged between the liquid outlet end of the deaerator and the main steam liquid inlet end of the boiler, the liquid inlet end of the high-pressure heater is connected with the liquid outlet end of the deaerator, and the liquid outlet end of the high-pressure heater is connected with the main steam liquid inlet end of the boiler;
the low pressure heater, low pressure heater's hot side steam inlet end with the steam outlet end of intermediate pressure jar reaches the steam outlet end of low pressure jar links to each other, low pressure heater's hot side steam outlet end with the hot side feed liquor end of condenser links to each other, low pressure heater's cold side sets up the feed liquor end of oxygen-eliminating device with the hot side of condenser goes out between the liquid end links to each other, low pressure heater's feed liquor cold side end with the hot side of condenser goes out the liquid end and links to each other, low pressure heater's cold side goes out the liquid end with the feed liquor end of oxygen-eliminating device links to each other.
5. The fused salt heat storage and release system based on the thermal power generating unit as claimed in claim 4, wherein the thermal power generating unit further comprises:
the deoxygenation water pump is arranged between the cold side liquid inlet end of the high-pressure heater and the liquid outlet end of the deoxygenator, the liquid inlet end of the deoxygenation water pump is connected with the liquid outlet end of the deoxygenator, and the liquid outlet end of the deoxygenation water pump is connected with the cold side liquid inlet end of the high-pressure heater;
and the condensate pump is arranged between the cold side liquid inlet end of the low-pressure heater and the hot side liquid outlet end of the condenser, the liquid inlet end of the condensate pump is connected with the hot side liquid outlet end of the condenser, and the liquid outlet end of the condensate pump is connected with the cold side liquid inlet end of the low-pressure heater.
6. The fused salt heat storage and release system based on the thermal power generating unit as claimed in claim 2, further comprising:
the first valve is arranged between the steam outlet end of the main steam of the boiler and the injection end of the pressure matcher;
the second valve is arranged between the steam inlet end of the high-pressure cylinder and the main steam outlet end of the boiler;
the third valve is arranged between the steam outlet end of the reheated steam of the boiler and the steam inlet end of the hot side of the first heat exchanger;
the fourth valve is arranged between the steam inlet end of the intermediate pressure cylinder and the steam outlet end of the reheat steam of the boiler;
and the fifth valve is arranged between the steam inlet end of the intermediate pressure cylinder and the cold side steam outlet end of the second heat exchanger.
7. The fused salt heat storage and release system based on the thermal power generating unit as claimed in claim 2, further comprising:
the sixth valve is arranged between the steam inlet end of the reheated steam of the boiler and the steam outlet end of the pressure matcher;
and the seventh valve is arranged between the steam outlet end of the high-pressure cylinder and the cold-side steam inlet end of the second heat exchanger.
8. A molten salt heat storage and release system based on a thermal power generating unit according to any one of claims 1-7, characterized by further comprising:
and the steam inlet end of the water spray desuperheater is connected with the steam outlet end of the high-pressure cylinder, the steam outlet end of the water spray desuperheater is connected with the cold side steam inlet end of the second heat exchanger, and the water spraying end of the water spray desuperheater is connected with the liquid outlet end of the deaerator of the thermal power generating unit.
9. The fused salt heat storage and release system based on the thermal power generating unit as claimed in claim 8, further comprising:
and the eighth valve is arranged between the water spraying end of the water spraying desuperheater and the liquid outlet end of the deaerator of the thermal power generating unit.
10. A molten salt heat storage and release system based on a thermal power generating unit according to any one of claims 1-7, characterized by further comprising:
the ninth valve is arranged between a cold-side liquid inlet end of the first heat exchanger and a liquid outlet end of the low-temperature molten salt tank;
the tenth valve is arranged between the liquid inlet end at the hot side of the second heat exchanger and the liquid outlet end of the high-temperature molten salt tank;
the cryogenic pump is arranged between a cold side liquid inlet end of the first heat exchanger and a liquid outlet end of the low-temperature molten salt tank, a liquid inlet end of the cryogenic pump is connected with a liquid outlet end of the low-temperature molten salt tank, and a liquid outlet end of the cryogenic pump is connected with a cold side liquid inlet end of the first heat exchanger;
the high-temperature pump is arranged between the hot side liquid inlet end of the second heat exchanger and the liquid outlet end of the high-temperature molten salt tank, the liquid inlet end of the high-temperature pump is connected with the liquid outlet end of the high-temperature molten salt tank, and the liquid outlet end of the high-temperature pump is connected with the hot side liquid inlet end of the second heat exchanger.
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| CN202221961808.2U CN217813623U (en) | 2022-07-27 | 2022-07-27 | Fused salt heat storage and release system based on thermal power generating unit |
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| CN202221961808.2U CN217813623U (en) | 2022-07-27 | 2022-07-27 | Fused salt heat storage and release system based on thermal power generating unit |
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