CN209944288U - Single-tank fused salt heat accumulating type electric heating steam boiler - Google Patents
Single-tank fused salt heat accumulating type electric heating steam boiler Download PDFInfo
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- CN209944288U CN209944288U CN201920582660.3U CN201920582660U CN209944288U CN 209944288 U CN209944288 U CN 209944288U CN 201920582660 U CN201920582660 U CN 201920582660U CN 209944288 U CN209944288 U CN 209944288U
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- 150000003839 salts Chemical class 0.000 title claims abstract description 115
- 238000005485 electric heating Methods 0.000 title claims abstract description 58
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 91
- 238000009825 accumulation Methods 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 238000005338 heat storage Methods 0.000 claims description 83
- 238000009413 insulation Methods 0.000 claims description 20
- 238000005192 partition Methods 0.000 claims description 19
- 239000007788 liquid Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 8
- 229920006395 saturated elastomer Polymers 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 230000001172 regenerating effect Effects 0.000 claims 9
- 238000012423 maintenance Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000004146 energy storage Methods 0.000 description 6
- 238000012546 transfer Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/14—Thermal energy storage
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Abstract
The utility model discloses a single jar fused salt heat accumulation formula electrical heating steam boiler, including single jar fused salt heat accumulation device and catch water, the sealed intercommunication of steam inlet on single jar fused salt heat accumulation device is through first connecting tube and catch water, and the last water supply inlet of single jar fused salt heat accumulation device is provided with the feed pump on the second connecting tube through the sealed intercommunication of return water export on second connecting tube and the catch water. The single-tank molten salt heat accumulating type electric heating steam boiler with the structure can efficiently accumulate heat, and is low in manufacturing cost and low in operation and maintenance cost.
Description
Technical Field
The utility model relates to a heat accumulation energy storage technical field especially relates to a single jar fused salt heat accumulation formula electrical heating steam boiler.
Background
The molten salt has the advantages of wide liquid temperature range, low viscosity, good flow performance, small vapor pressure, low requirement on pipeline pressure-bearing capacity, high relative density, high specific heat capacity, strong heat storage capacity, low cost and the like, is a well-known good medium-high temperature heat transfer and storage medium, and a molten salt energy storage technology utilizing the molten salt as a heat transfer and storage medium is one of the most mainstream medium-high temperature heat storage technologies at present.
At present, the fused salt double-tank heat storage technology is mature, but the double-tank fused salt heat storage type electric heating steam boiler occupies a large space, the connecting pipelines between the two heat storage tank bodies are more and complicated, and a driving pump for enabling the fused salt to move back and forth between the two heat storage tank bodies needs to be independently arranged; in addition, due to the factors of large usage amount of the materials and the molten salt of the heat storage tank, high temperature maintenance requirement and the like, the double-tank molten salt heat storage type electric heating steam boiler is expensive in manufacturing cost and very high in operation and maintenance cost.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that needs to solve is: the single-tank molten salt heat accumulating type electric heating steam boiler can efficiently accumulate heat, and is low in manufacturing cost and operation and maintenance cost.
In order to solve the above problem, the utility model adopts the following technical scheme: the single-tank molten salt heat accumulating type electric heating steam boiler comprises: the single-tank molten salt heat storage device comprises a single-tank molten salt heat storage device and a steam-water separator, wherein the single-tank molten salt heat storage device is structurally characterized in that: the heat storage tank comprises a heat storage tank body with a heat insulation layer, wherein a molten salt injection port communicated with an inner cavity of the heat storage tank body is arranged at the top of the heat storage tank body, a molten salt discharge port communicated with the inner cavity of the heat storage tank body is arranged at the bottom of the heat storage tank body, a cylindrical heat insulation partition plate is arranged in the middle of the inner cavity of the heat storage tank body in a hanging mode through a support piece and is coaxially arranged with the heat storage tank body, a high-temperature region is formed in the inner cavity of the cylindrical heat insulation partition plate, an annular heat exchange region is formed between the outer side wall of the cylindrical heat insulation partition plate and the inner side wall of the heat storage tank body at intervals, an upper channel for molten salt to flow is; a steam outlet and a water supply inlet are sequentially arranged on the side wall of the heat storage tank body positioned at the annular heat exchange region from top to bottom, an electric heating device for heating a high-temperature region is arranged at the bottom of the inner cavity of the heat storage tank body, a spiral coil heat exchanger is arranged in the annular heat exchange region, the outlet end of the spiral coil heat exchanger is hermetically communicated with the steam outlet, and the inlet end of the spiral coil heat exchanger is hermetically communicated with the water supply inlet; the steam outlet is communicated with a steam inlet on the steam-water separator in a sealing way through a first connecting pipeline, the water supply inlet is communicated with a water return outlet on the steam-water separator in a sealing way through a second connecting pipeline, and a water supply pump is arranged on the second connecting pipeline.
Further, the single-tank molten salt heat storage type electric heating steam boiler comprises: the tail end of each electric heating rod penetrates through a corresponding through hole at the bottom of the heat storage tank body in a sealing manner and then extends out of the heat storage tank body, and the electric heating rods are uniformly distributed at intervals and surround the high-temperature area.
Further, aforementioned single jar fused salt heat accumulation formula electric heating steam boiler, wherein, vertical fixed a plurality of sleeves that are provided with in heat accumulation tank body inner chamber bottom, the sleeve pipe top is sealed, and the sleeve pipe bottom is opened, and in the sleeve pipe top stretched into high temperature region, the sleeve pipe bottom was sealed to be passed the through-hole that heat accumulation tank body bottom corresponds and stretch out outside the heat accumulation tank body, and each electric heating rod inserts respectively through the open mouth in sleeve pipe bottom and corresponds the sleeve pipe.
Further, in the single-tank molten salt heat accumulating type electric heating steam boiler, the sleeves are uniformly distributed at intervals and surround the high-temperature area.
Further, in the single-tank molten salt heat accumulating type electric heating steam boiler, the heat insulating layer wrapped on the heat accumulating tank body is a heat insulating layer with a heat conductivity coefficient smaller than 0.12W/(m · K).
Further, in the single-tank molten salt heat accumulating type electric heating steam boiler, the cylindrical heat insulating partition plate arranged in the inner cavity of the heat accumulating tank body is a cylindrical heat insulating partition plate with a heat conductivity coefficient not more than 0.025W/(m.K).
Further, the single-tank molten salt heat accumulating type electric heating steam boiler is characterized in that the steam-water separator is a baffle-type steam-water separator, and the structure of the steam-water separator is as follows: the steam-gas separation device comprises a tank body, wherein a steam baffle plate with a gas-liquid separation function is arranged in an inner cavity of the tank body, the inner cavity of the tank body is divided into an upper inner cavity and a lower inner cavity by the steam baffle plate, a saturated steam outlet communicated with the upper inner cavity is arranged at the top of the tank body, and a water return outlet communicated with the lower inner cavity is arranged at the bottom of the tank body; the side wall of the tank body positioned at the lower inner cavity is respectively provided with a steam inlet and a water replenishing port for replenishing water to the lower inner cavity, the top end of the steam pipe is hermetically communicated with the steam inlet, and the tail end of the steam pipe is immersed in the water in the lower inner cavity.
Further, in the single-tank molten salt heat accumulating type electric heating steam boiler, the water replenishing port is communicated with a water source through a water replenishing pump, and the water feeding pump is a plunger type metering pump.
Further, in the single-tank molten salt heat accumulating type electric heating steam boiler, a pressure gauge for measuring the pressure in the inner cavity of the tank body is arranged at the top of the tank body, the pressure gauge and the plunger type metering pump are both connected with the control device, and the control device dynamically adjusts the flow of the plunger type metering pump according to data measured by the pressure gauge, so that the pressure in the inner cavity of the tank body is maintained at a constant value.
Further, in the single-tank molten salt heat accumulating type electric heating steam boiler, a liquid level meter for measuring the water level of the lower inner cavity is arranged on the tank body.
The utility model has the advantages that: the single-tank molten salt heat accumulating type electric heating steam boiler has the advantages of compact structure, small occupied area and simple operation process, and can well realize the purpose of high-efficiency heat accumulation. Compared with a double-tank molten salt heat accumulating type electric heating steam boiler, the consumption of materials of a heat accumulating tank body is reduced, the number of external connecting pipelines for connecting double tanks is reduced, in addition, the density difference caused by the high-low temperature difference of the molten salt in the high-temperature region and the molten salt in the annular heat exchange region is utilized, the molten salt in the high-temperature region and the molten salt in the annular heat exchange region form natural convection, a driving pump for enabling the molten salt to flow is not needed to be additionally arranged, the manufacturing cost is reduced by 35% compared with the double-tank molten salt heat accumulating type electric heating steam boiler, and the operation cost and the maintenance cost are.
Drawings
Fig. 1 is a schematic diagram of the internal structure principle of the single-tank molten salt heat accumulating type electric heating steam boiler of the present invention.
Fig. 2 is a schematic sectional view of the molten salt heat storage device for a single tank in fig. 1.
Fig. 3 is a schematic view of the heat storage tank of fig. 1 with a top portion removed.
Fig. 4 is a schematic view of the position of the sleeve and the electric heating rod.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and preferred embodiments.
Example one
As shown in fig. 1, 2 and 3, the single-tank molten salt heat storage type electric heating steam boiler of the present embodiment includes a single-tank molten salt heat storage device and a steam-water separator, and the single-tank molten salt heat storage device has a structure that: the heat storage tank comprises a heat storage tank body 1 with a heat insulation layer, wherein the heat insulation layer wrapped on the heat storage tank body 1 is the heat insulation layer with the heat conductivity coefficient smaller than 0.12W/(m.K), the heat insulation layer with the heat conductivity coefficient smaller than 0.12W/(m.K) has a very good heat insulation effect, and heat loss of high-temperature molten salt in an inner cavity 10 of the heat storage tank body after heat storage can be effectively prevented. A molten salt injection port 11 communicated with the inner cavity 10 of the heat storage tank body is arranged at the top of the heat storage tank body 1, a molten salt discharge port 12 communicated with the inner cavity 10 of the heat storage tank body is arranged at the bottom of the heat storage tank body 1, molten salt enters the heat storage tank body 1 through the molten salt injection port 11, and the molten salt injection port 11 and the molten salt discharge port 12 are in a normally closed state during normal operation. The inner cavity 10 of the heat storage tank body is provided with a cylindrical heat insulation partition plate 3, and the cylindrical heat insulation partition plate 3 is a cylindrical heat insulation partition plate with the heat conductivity coefficient not more than 0.025W/(m.K). The cylindrical heat-insulating partition 3 is suspended in the middle of the inner cavity 10 of the heat storage tank body through a support piece 31, and the cylindrical heat-insulating partition 3 is coaxial with the heat storage tank body 1. An upper channel 13 for molten salt to flow is formed by a gap between the top of the cylindrical heat insulation partition plate 3 and the top of the inner cavity 10 of the heat storage tank body, a lower channel 14 for molten salt to flow is formed by a gap between the bottom of the cylindrical heat insulation partition plate 3 and the bottom of the inner cavity 10 of the heat storage tank body, a high-temperature zone 4 is formed by the inner cavity of the cylindrical heat insulation partition plate, an annular heat exchange zone 5 is formed by a gap between the outer side wall of the cylindrical heat insulation partition plate 3 and the inner side wall of the heat storage tank body 1, and the molten salt in the high-temperature zone. A steam outlet 15 and a water supply inlet 16 are sequentially arranged on the side wall of the heat storage tank body 1 positioned at the annular heat exchange area 5 from top to bottom, a spiral coil heat exchanger 2 is arranged at the annular heat exchange area 5, the outlet end of the spiral coil heat exchanger 2 is hermetically communicated with the steam outlet 15, and the inlet end of the spiral coil heat exchanger 2 is hermetically communicated with the water supply inlet 16.
Be provided with the electric heater unit that heats high temperature zone 4 bottom heat accumulation tank body inner chamber 10, electric heater unit include: a plurality of cylindrical electric heating rods 6 are arranged at the lower section of the high-temperature zone 4, and the tail end of each electric heating rod 6 passes through a corresponding through hole at the bottom of the heat storage tank body 1 in a sealing manner and then extends out of the heat storage tank body 1. Wherein, each electric heating rod 6 is evenly distributed at intervals around the high temperature zone 4.
The steam-water separator is a baffle type steam-water separator, and the structure of the steam-water separator is as follows: the steam-gas separation tank comprises a tank body 7, wherein a steam baffle plate 8 with a gas-liquid separation function is arranged in an inner cavity of the tank body, the inner cavity of the tank body is divided into an upper inner cavity 71 and a lower inner cavity 72 by the steam baffle plate 8, a saturated steam outlet 73 communicated with the upper inner cavity 71 is arranged at the top of the tank body 7, and a water return outlet 75 communicated with the lower inner cavity 72 is arranged at the bottom of the tank body 7. A steam inlet 76 and a water replenishing port 74 are respectively arranged on the side wall of the tank body positioned at the lower inner cavity 72, and when the water level in the lower inner cavity 72 is lower than a set value, water is replenished into the lower inner cavity 72 through the water replenishing port 74. A steam pipe 10 is disposed in the lower inner cavity, the top end of the steam pipe 10 is in sealed communication with the steam inlet 76, and the tail end of the steam pipe 10 is immersed in the water in the lower inner cavity 72. When the steam-water separator works normally, the tail end of the steam pipe 10 is always immersed in the water in the lower inner cavity 72.
The steam outlet 15 on the heat storage tank body 1 is in sealed communication with the steam inlet 76 on the steam-water separator through a first connecting pipeline 91, the water supply inlet 16 on the heat storage tank body 1 is in sealed communication with the water return outlet 75 on the steam-water separator through a second connecting pipeline 92, the water supply pump 101 is arranged on the second connecting pipeline 92, and water in the lower inner cavity 72 is pumped into the spiral coil heat exchanger 2 through the water supply pump 101.
The working principle of the single-tank molten salt heat accumulating type electric heating steam boiler is as follows:
a heat storage stage:
the water feeding pump 101 does not work, no heat transfer medium, namely water, exists in the spiral coil heat exchanger 2, the steam-water separator does not work at the moment, and only the single-tank molten salt heat storage device carries out heat storage and energy storage operation.
The electric heating rods 6 are supplied with electric energy through an external power supply, so that the electric heating rods 6 heat the molten salt in the high-temperature region 4, the temperature of the molten salt in the high-temperature region 4 is gradually increased, the density of the molten salt with gradually increased temperature is gradually reduced, the temperature of the molten salt in the annular heat exchange region 5 is lower than that of the molten salt in the high-temperature region 4 at the moment, the density of the molten salt with low temperature is higher, and the density difference of the molten salt in the two regions caused by the high-low temperature difference existing in the two regions of the high-temperature region 4 and the annular heat exchange region 5 makes the molten salt in the high-temperature region 4 and the molten salt: the molten salt in the annular heat exchange region 5 flows to the high temperature region 4 through the lower channel 14, while the molten salt in the high temperature region 4 flows upwards from the bottom of the high temperature region 4, then flows to the annular heat exchange region 5 through the upper channel 13, and then flows downwards from the top of the annular heat exchange region 5, so that natural convection is formed.
The molten salt in the inner cavity 10 of the heat storage tank body is uniformly distributed and the temperature in the inner cavity 10 of the heat storage tank body is uniformly distributed through natural convection of the molten salt in the high-temperature region 4 and the molten salt in the annular heat exchange region 5, so that the purpose of high-efficiency energy storage is realized, the utilization rate of the molten salt is greatly improved, and the service life of the molten salt is greatly prolonged.
An exothermic phase:
the water feed pump 101 works to enable the heat transfer medium-water in the lower inner cavity 72 to enter the spiral coil heat exchanger 2 through the water return outlet 75, the water feed pump 101 and the water feed inlet 16 to perform indirect heat exchange with the molten salt in the annular heat exchange region 5, the heat transfer medium-water absorbs heat in the molten salt to become high-temperature superheated steam and enter the water in the lower inner cavity 72 from the steam outlet 15, the first connecting pipeline 91, the steam inlet 76 and the steam pipe 10 to perform secondary heat exchange with the water in the lower inner cavity 72 to form saturated steam, the saturated steam rises and is subjected to gas-liquid separation through the steam baffle plate 8, the saturated steam separated by the steam baffle plate 8 is output to a user through the saturated steam outlet 73, and liquid water separated by the steam baffle plate 8 falls into the lower inner cavity 72 to be mixed with the water in the lower inner cavity 72. The above process is a water circulation process.
The temperature of the molten salt in the annular heat exchange zone 5 is reduced after indirect heat exchange with water, which is a heat transfer medium in the spiral coil heat exchanger 2, and the density of the molten salt with reduced temperature is increased, at this time, the temperature of the molten salt in the annular heat exchange zone 5 is lower than that of the molten salt in the high temperature zone 4, the density of the molten salt with low temperature is higher, and the density difference of the molten salt in the two zones caused by the high-low temperature difference existing in the two zones of the high temperature zone 4 and the annular heat exchange zone 5 causes the molten salt in the high temperature zone 4 and the molten salt in: the molten salt in the annular heat exchange region 5 flows to the high temperature region 4 through the lower channel 14, while the molten salt in the high temperature region 4 flows upwards from the bottom of the high temperature region 4, then flows to the annular heat exchange region 5 through the upper channel 13, and then flows downwards from the top of the annular heat exchange region 5, so that natural convection is formed.
In actual use, the molten salt in the internal cavity 10 of the heat storage tank body can be heated to a set temperature by the electric heating rods 6 using the low-valley electricity which is cheap at night, and the low-valley electricity at night is converted into high-temperature heat energy of the molten salt and stored. The high-temperature heat energy stored in the solar energy storage device is released for heating in the peak period of electricity utilization in the daytime, so that peak shifting and valley filling of the electricity can be realized, the problem of serious urban pollution can be solved, and the solar energy storage device has good economy.
Example two
As shown in fig. 2 and 4, the present embodiment is different from the first embodiment in that: in the present embodiment, each electric heating rod 6 is sleeved with a sleeve 61, and the specific connection manner of the sleeve 61 and the heat storage tank 1 is as follows: a plurality of sleeves 61 are vertically and fixedly arranged at the bottom of the inner cavity 10 of the heat storage tank body, the top ends of the sleeves 61 are closed, the bottom ends of the sleeves 61 are opened, the top ends of the sleeves 61 extend into the high-temperature region 4, the bottom ends of the sleeves 61 penetrate through corresponding through holes in the bottom of the heat storage tank body 1 in a sealing mode and then extend out of the heat storage tank body 1, and each electric heating rod 6 is inserted into the corresponding sleeve 61 through an opening in the bottom end of the sleeve. As shown in fig. 3, the sleeves 61 are uniformly distributed around the high-temperature zone 4 at intervals. The arrangement of the sleeve 61 can prevent corrosion phenomena caused by direct contact between each electric heating rod 6 and fused salt, prolong the service life of each electric heating rod 6, facilitate replacement of each electric heating tube 6, avoid shutdown of the single-tank fused salt heat accumulation type electric heating steam boiler during replacement, avoid treatment of discharging fused salt to the inner cavity 10 of the heat accumulation tank body, and replace the electric heating tube 6 only by taking out the electric heating tube 6 to be replaced from the sleeve 61. The rest of the structure and the using mode are the same as those of the first embodiment, and are not described again.
EXAMPLE III
As shown in fig. 1, the difference between the present embodiment and the first embodiment is: the water replenishing port 74 is communicated with a water source through a water replenishing pump 102, and the water feeding pump 101 adopts a plunger type metering pump. The top of the tank body 7 is provided with a pressure gauge 103 for measuring the pressure in the inner cavity of the tank body, the pressure gauge 103 and the plunger type metering pump are both connected with a control device, and the control device dynamically adjusts the flow of the plunger type metering pump according to data measured by the pressure gauge 103, so that the pressure in the inner cavity of the tank body is maintained at a constant value. The specific dynamic regulation is that the flow of the plunger type metering pump is controlled by frequency conversion according to the change rate of the pressure in the inner cavity of the tank body: when the pressure increasing rate in the steam-water separator exceeds a set value, the flow of the plunger type metering pump is reduced, and when the pressure increasing rate in the steam-water separator is lower than the set value, the flow of the plunger type metering pump is increased.
In this embodiment, a liquid level meter 104 for measuring the water level in the lower cavity 72 is disposed on the tank 7, and when the water level in the lower cavity 72 is lower than a set value, the water can be supplied to the lower cavity 72 by the water supply pump 102. The rest of the structure and the using mode are the same as those of the first embodiment, and are not described again.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any modifications or equivalent changes made in accordance with the technical spirit of the present invention are also within the scope of the present invention.
The utility model has the advantages that: the single-tank molten salt heat accumulating type electric heating steam boiler has the advantages of compact structure, small occupied area and simple operation process, and can well realize the purpose of high-efficiency heat accumulation. Compared with a double-tank molten salt heat accumulating type electric heating steam boiler, the consumption of materials of a heat accumulating tank body is reduced, the number of external connecting pipelines for connecting double tanks is reduced, in addition, the molten salt in the high-temperature region 4 and the molten salt in the annular heat exchange region 5 form natural convection by utilizing the density difference caused by the high-low temperature difference of the molten salt in the high-temperature region 4 and the molten salt in the annular heat exchange region 5, so that a driving pump for enabling the molten salt to flow does not need to be additionally arranged, the manufacturing cost is reduced by 35% compared with the double-tank molten salt heat accumulating type electric heating steam boiler, and the operation cost and the maintenance cost.
Claims (10)
1. Single jar fused salt heat accumulation formula electrical heating steam boiler, its characterized in that: the single-tank molten salt heat storage device comprises a single-tank molten salt heat storage device and a steam-water separator, and the structure of the single-tank molten salt heat storage device is as follows: the heat storage tank comprises a heat storage tank body with a heat insulation layer, wherein a molten salt injection port communicated with an inner cavity of the heat storage tank body is arranged at the top of the heat storage tank body, a molten salt discharge port communicated with the inner cavity of the heat storage tank body is arranged at the bottom of the heat storage tank body, a cylindrical heat insulation partition plate is arranged in the middle of the inner cavity of the heat storage tank body in a hanging mode through a support piece and is coaxially arranged with the heat storage tank body, a high-temperature region is formed in the inner cavity of the cylindrical heat insulation partition plate, an annular heat exchange region is formed in a gap between the outer side wall of the cylindrical heat insulation partition plate and the inner side wall of the heat storage tank body, an upper channel for molten salt to flow; a steam outlet and a water supply inlet are sequentially arranged on the side wall of the heat storage tank body positioned at the annular heat exchange region from top to bottom, an electric heating device for heating a high-temperature region is arranged at the bottom of the inner cavity of the heat storage tank body, a spiral coil heat exchanger is arranged in the annular heat exchange region, the outlet end of the spiral coil heat exchanger is hermetically communicated with the steam outlet, and the inlet end of the spiral coil heat exchanger is hermetically communicated with the water supply inlet; the steam outlet is communicated with a steam inlet on the steam-water separator in a sealing way through a first connecting pipeline, the water supply inlet is communicated with a water return outlet on the steam-water separator in a sealing way through a second connecting pipeline, and a water supply pump is arranged on the second connecting pipeline.
2. A single vessel molten salt regenerative electric heating steam boiler according to claim 1, wherein: the electric heating device comprises: the tail end of each electric heating rod penetrates through a corresponding through hole at the bottom of the heat storage tank body in a sealing manner and then extends out of the heat storage tank body, and the electric heating rods are uniformly distributed at intervals and surround the high-temperature area.
3. A single vessel molten salt regenerative electric heating steam boiler according to claim 1, wherein: the heat storage tank body is characterized in that a plurality of sleeves are vertically and fixedly arranged at the bottom of the inner cavity of the heat storage tank body, the top ends of the sleeves are closed, the bottom ends of the sleeves are opened, the top ends of the sleeves stretch into the high-temperature area, the bottom ends of the sleeves are sealed to penetrate through corresponding through holes in the bottom of the heat storage tank body and then stretch out of the heat storage tank body, and each electric heating rod is inserted into the corresponding sleeve through.
4. A single vessel molten salt regenerative electric heating steam boiler according to claim 3, wherein: the sleeves are uniformly distributed at intervals and surround the high-temperature area.
5. A single vessel molten salt regenerative electric heating steam boiler according to claim 1, 2 or 3, wherein: the heat-insulating layer wrapped on the heat-storage tank body is a heat-insulating layer with the heat conductivity coefficient less than 0.12W/(m.K).
6. A single vessel molten salt regenerative electric heating steam boiler according to claim 1, 2 or 3, wherein: the cylindrical heat-insulating partition plate arranged in the inner cavity of the heat storage tank body is a cylindrical heat-insulating partition plate with the heat conductivity coefficient not more than 0.025W/(m.K).
7. A single vessel molten salt regenerative electric heating steam boiler according to claim 1, wherein: the steam-water separator is a baffle type steam-water separator, and the structure of the steam-water separator is as follows: the steam-gas separation device comprises a tank body, wherein a steam baffle plate with a gas-liquid separation function is arranged in an inner cavity of the tank body, the inner cavity of the tank body is divided into an upper inner cavity and a lower inner cavity by the steam baffle plate, a saturated steam outlet communicated with the upper inner cavity is arranged at the top of the tank body, and a water return outlet communicated with the lower inner cavity is arranged at the bottom of the tank body; the side wall of the tank body positioned at the lower inner cavity is respectively provided with a steam inlet and a water replenishing port for replenishing water to the lower inner cavity, the top end of the steam pipe is hermetically communicated with the steam inlet, and the tail end of the steam pipe is immersed in the water in the lower inner cavity.
8. A single vessel molten salt regenerative electric heating steam boiler according to claim 7, wherein: the water replenishing port is communicated with a water source through a water replenishing pump, and the water feeding pump is a plunger type metering pump.
9. A single vessel molten salt regenerative electric heating steam boiler according to claim 8, wherein: the pressure gauge for measuring the pressure in the inner cavity of the tank body is arranged at the top of the tank body, the pressure gauge and the plunger type metering pump are both connected with the control device, and the control device dynamically adjusts the flow of the plunger type metering pump according to data obtained by measuring of the pressure gauge, so that the pressure in the inner cavity of the tank body is maintained at a constant value.
10. A single vessel molten salt regenerative electric heating steam boiler according to claim 7, wherein: a liquid level meter for measuring the water level of the lower inner cavity is arranged on the tank body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920582660.3U CN209944288U (en) | 2019-04-26 | 2019-04-26 | Single-tank fused salt heat accumulating type electric heating steam boiler |
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| CN201920582660.3U CN209944288U (en) | 2019-04-26 | 2019-04-26 | Single-tank fused salt heat accumulating type electric heating steam boiler |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109973975A (en) * | 2019-04-26 | 2019-07-05 | 张家港威孚热能股份有限公司 | Single-tank molten salt regenerative electric heating steam boiler |
| WO2022088649A1 (en) * | 2020-10-26 | 2022-05-05 | 西安西热节能技术有限公司 | Molten salt layered energy storage system capable of supplying steam at constant temperature |
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2019
- 2019-04-26 CN CN201920582660.3U patent/CN209944288U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109973975A (en) * | 2019-04-26 | 2019-07-05 | 张家港威孚热能股份有限公司 | Single-tank molten salt regenerative electric heating steam boiler |
| WO2022088649A1 (en) * | 2020-10-26 | 2022-05-05 | 西安西热节能技术有限公司 | Molten salt layered energy storage system capable of supplying steam at constant temperature |
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