CN209960600U - Single-tank molten salt heating system - Google Patents
Single-tank molten salt heating system Download PDFInfo
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- CN209960600U CN209960600U CN201821933341.4U CN201821933341U CN209960600U CN 209960600 U CN209960600 U CN 209960600U CN 201821933341 U CN201821933341 U CN 201821933341U CN 209960600 U CN209960600 U CN 209960600U
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Abstract
The utility model discloses a single jar fused salt heating system, include: the system comprises a molten salt storage tank, a shell-and-tube heat exchanger and a first water storage tank, wherein the molten salt storage tank is communicated with a pipeline in the shell-and-tube heat exchanger, so that high-temperature liquid molten salt in the molten salt storage tank circularly flows in the pipeline in the shell-and-tube heat exchanger; the shell of the shell-and-tube heat exchanger is sequentially communicated with the first water storage tank and the heat consumer, so that water in the shell of the shell-and-tube heat exchanger and high-temperature liquid molten salt in the shell-and-tube heat exchanger sequentially enter the first water storage tank and the heat consumer after heat exchange and temperature rise, and then sequentially return to the first water storage tank to form closed-loop circulation. The utility model discloses a single jar fused salt heating system has solved the problem such as fused salt storage tank is bulky, the cost is high, maintenance cost height, makes the heat exchange efficiency of fused salt improve, has also reduced the flow loss of water.
Description
Technical Field
The utility model belongs to the technical field of the energy storage heat-retaining, in particular to single jar fused salt heating system.
Background
In recent years, with the acceleration of urbanization and industrialization in China, the development speed of many high-energy-consumption industries (such as power generation, petrochemical industry and the like) is faster and faster, so that the energy demand is increased rapidly, the energy conversion and utilization efficiency becomes the research center of energy science and technology, and particularly, the low utilization rate of coal causes long duration of haze weather and large pollution degree, so that more and more adverse effects are caused to the life of people. In order to effectively treat haze weather and improve the quality of ambient air, a plurality of provinces and cities have greatly promoted a coal-to-electricity project, and an electric heating boiler is used for replacing a coal-fired boiler. Meanwhile, the contradiction between the supply and demand between the power plant and the user causes huge economic loss and energy waste, the heat storage technology is an effective means for solving the problems of peak-valley difference of the power grid and environmental protection, and the needed energy is stored by using low-valley cheap electric power for use when needed, so that the problems of increased peak-valley difference of the power grid, difficult peak regulation of a unit and the like are solved.
The fused salt has high heat storage density and good heat conductivity, and is a novel heat storage material widely applied at present. Adopt electrical heating fused salt to carry out central heating, can store in the high temperature fused salt with unnecessary electric power conversion heat energy when the power consumption low ebb, release the heat of storage again when the power consumption peak period and heat, solve the problem of air pollution and electric wire netting peak regulation. CN204084540U discloses a fused salt heat accumulation formula electrical heating central heating system, this system at night off-peak electricity period through the fused salt pump with the fused salt in the cold salt jar take out to convey fused salt electric heater with fused salt heating to high temperature after get into the hot salt jar, utilize the fused salt pump to take out the high temperature fused salt of heat accumulation in the hot salt jar and convey to fused salt-water heat exchanger heating municipal administration heating usefulness's aquatic product hot water to the resident heating daytime peak. CN 104235929A discloses a solar molten salt heat storage heating system, which adopts a static molten salt tank and an electric heater to directly heat inside a molten salt water body, releases the heat for users by an indirect heat exchange method through a heat insulation layer, and also adopts a solar heat collector and a heat preservation water tank to store solar heat energy. The two systems have the defects of complex structure and high operation cost, and are not favorable for stable operation of the systems in the heating field.
The problems of the prior art are as follows:
(1) in the prior art, a cold salt storage tank and a hot salt storage tank need to be arranged, low-temperature molten salt in the cold salt storage tank is conveyed to an electric heater by a cold salt pump to be heated, then enters the hot salt storage tank to be stored and then goes to heat exchange equipment, and the molten salt storage tank is large in size, high in heat preservation performance requirement, high in manufacturing cost and high in maintenance cost;
(2) the heat exchanger is not arranged in the prior art, indirect heat exchange is carried out through the heat insulation layer of the fused salt storage tank, the flowing loss of water is increased, the heat exchange efficiency of the fused salt is reduced, and the comprehensive popularization and stable operation of the system are not facilitated.
In view of the above, it is an urgent problem in the art to overcome the above-mentioned drawbacks of the prior art.
SUMMERY OF THE UTILITY MODEL
In order to overcome the technical problems in the prior art,
an aspect of the utility model provides a single-tank fused salt heating system, include:
fused salt storage tank, shell and tube type heat exchanger, first storage water tank, wherein:
the molten salt storage tank is communicated with a pipeline in the shell-and-tube heat exchanger, so that the high-temperature liquid molten salt in the molten salt storage tank circularly flows in the pipeline in the shell-and-tube heat exchanger;
the shell of the shell-and-tube heat exchanger is sequentially communicated with the first water storage tank and the heat consumer, so that water in the shell of the shell-and-tube heat exchanger and high-temperature liquid molten salt in the shell-and-tube heat exchanger sequentially enter the first water storage tank and the heat consumer after heat exchange and temperature rise, and then sequentially return to the first water storage tank to form closed-loop circulation.
The utility model provides a single-tank molten salt heating system on the other hand, which comprises a molten salt storage tank, a shell-and-tube heat exchanger and a first water storage tank,
the molten salt storage tank is communicated with a shell in the shell-and-tube heat exchanger, so that the high-temperature liquid molten salt in the molten salt storage tank circularly flows in the shell-and-tube heat exchanger;
the pipeline of the shell-and-tube heat exchanger is sequentially communicated with the first water storage tank and the heat consumer, so that water in the pipeline of the shell-and-tube heat exchanger and high-temperature liquid molten salt in the shell-and-tube heat exchanger sequentially enter the first water storage tank and the heat consumer after heat exchange and temperature rise, and then sequentially return to the first water storage tank to form closed-loop circulation.
Further, the hot water storage device also comprises a second water storage tank, wherein the second water storage tank is communicated with the first water storage tank and the second water storage tank is communicated with a hot user; and
the solar heat collector is communicated with a heat user; the solar heat collector is respectively communicated with the first water storage tank and the second water storage tank.
Furthermore, a salt inlet pipeline and a salt return pipeline are respectively arranged between the molten salt storage tank and the shell-and-tube heat exchanger, a first one-way electromagnetic valve is arranged on the salt return pipeline, and the molten salt is heated by utilizing the off-peak electricity at night, so that the water in the shell-and-tube heat exchanger is pumped into the first water storage tank after heat exchange.
Furthermore, a first water inlet pipeline and a first water return pipeline are respectively arranged between the first water storage tank and the shell-and-tube heat exchanger, a second one-way electromagnetic valve is arranged on the first water return pipeline, and water after heat exchange is pumped into the first water storage tank; if the water in the first water storage tank does not reach the set temperature, the second one-way electromagnetic valve is opened, and the water after heat exchange returns to the shell-and-tube heat exchanger through the first water return pipeline to continue heat exchange; and circulating until the water in the first water storage tank reaches the set temperature.
Furthermore, a second water inlet pipeline is arranged between the first water storage tank and the second water storage tank, a third one-way electromagnetic valve is arranged on the second water inlet pipeline, and when the water in the first water storage tank reaches the set temperature, the third one-way electromagnetic valve is opened so that the water reaching the set temperature enters the second water storage tank.
Furthermore, a third water inlet pipeline is arranged between the second water storage tank and the hot user, a fourth one-way electromagnetic valve is arranged on the third water inlet pipeline, and when the hot user uses hot water, the fourth one-way electromagnetic valve is opened to enable the hot water to flow out of the second water storage tank; a second water return pipeline is arranged between the hot user and the first water storage tank, and a third water return pipeline is arranged between the hot user and the solar heat collector; the second return water pipeline and the third return water pipeline are crossed and connected out to be provided with a first three-way electromagnetic valve: when the sunlight is sufficient, the backwater enters the solar heat collector through the first three-way electromagnetic valve and the third backwater pipeline; when sunlight is insufficient, the backwater enters the first water storage tank through the first three-way electromagnetic valve and the second backwater pipeline.
Furthermore, a fourth water inlet pipeline and a fourth water return pipeline are respectively arranged between the solar thermal collector and the first water storage tank, and a fifth water inlet pipeline is arranged between the solar thermal collector and the second water storage tank; a fifth one-way electromagnetic valve is arranged on the fourth water return pipeline; a second three-way electromagnetic valve is arranged at the joint of the fourth water inlet pipeline and the fifth water inlet pipeline: when the backwater is heated in the solar thermal collector and the set temperature is not reached, the backwater enters the first water storage tank through the fourth water inlet pipe by the second three-way electromagnetic valve and then enters the solar thermal collector through the fourth backwater pipe for cyclic heating; when the set temperature is reached, the water directly enters the second water storage tank through the second three-way electromagnetic valve and the fifth water inlet pipe.
Furthermore, when the sunlight is sufficient, the fifth one-way electromagnetic valve and the second three-way electromagnetic valve are in an open state; when the sunlight is insufficient, the fifth one-way electromagnetic valve and the second three-way electromagnetic valve are in a closed state.
Through the structure, the molten salt storage tank can store heat and supply heat at the low valley electricity period at night, the molten salt storage tank is heated through valley electricity and stores the heat in the molten salt, meanwhile, the molten salt loop circulation and the water heating loop are opened, hot water reaching the set temperature is stored in the first storage tank and used by a user, return water returns to the first storage tank along the loop to continue heating to complete the heating circulation, the solar thermal collector is not opened at night, and the electromagnetic valve and the pump connected with the solar thermal collector are both closed; only heating and not heating the fused salt storage tank in the off-peak electricity period, closing the electric heater, opening the rear fused salt loop circulation and the heating circulation, opening a valve and a pump connected with the solar heat collector to supplement energy to the system if the light is good, and closing the system if the light is not good
Preferably, an electric heater is arranged inside the molten salt storage tank and used for heating the molten salt.
Further, a thermocouple is arranged on the tank body of the molten salt storage tank in the height direction of the tank body and is used for measuring the temperature of the molten salt in the molten salt storage tank;
the electric heating control device obtains the temperature of the molten salt from the thermocouple and controls the electric heater to enable the molten salt to reach the preset temperature.
Preferably, the measuring points of the thermocouples are all on the central axis of the molten salt storage tank.
Preferably, the upper part of the first water storage tank is further provided with an automatic water replenishing device for automatically replenishing water to the first water storage tank.
Preferably, the solar heat collector is a plurality of solar heat collectors.
Preferably, the number of hot users is plural.
Preferably, the plurality of thermal users are connected in parallel.
Compared with the prior art, the utility model provides a single-tank fused salt heating system has following advantage:
(1) the system uses a single molten salt storage tank and a solar heat collector for heat supplement, so that the problems of large volume, high manufacturing cost, high maintenance cost and the like of the molten salt storage tank are solved;
(2) the system improves the heat exchange efficiency of the molten salt and reduces the flow loss of water by the indirect heat exchange mode between the molten salt-water heat exchanger and the water.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the apparatus and method in accordance with the invention and, together with the detailed description, serve to explain the advantages and principles of the invention.
FIG. 1 is a schematic diagram of a single-tank molten salt heating system according to a preferred embodiment of the present invention;
fig. 2 is a schematic structural view of a single-tank molten salt heating system according to another preferred embodiment of the present invention.
Description of the reference numerals
1-molten salt storage tank
2-shell-and-tube heat exchanger
3-first water storage tank
4-second water storage tank
5-electric heating controller
6-Heat consumer
7-Heat consumer
8-solar heat collector
9-electric heater
10-thermocouple
Y1-salt inlet pipeline
Y2-salt return pipeline
G1-first water inlet pipeline
G2-second water inlet pipeline
G3-third water inlet pipeline
G4-fourth water inlet pipeline
G5-fifth water inlet pipeline
R1-first water return line
R2-second water return pipeline
R3-third water return pipeline
R4-fourth water return pipeline
c 1-first one-way solenoid valve
c 2-second one-way solenoid valve
c 3-third one-way solenoid valve
c 4-fourth one-way solenoid valve
c 4-1-fourth one-way solenoid valve for user 6
c 4-1-fourth one-way solenoid valve for user 7
sc 1-first three-way electromagnetic valve
sc 2-second three-way electromagnetic valve
Detailed Description
The following detailed description of the embodiments of the present invention refers to the accompanying drawings. However, the present invention is not limited to the embodiments described below. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other, and the technical idea of the present invention may be combined with other known techniques or other techniques similar to those known techniques.
The terms "first" and "second" as used herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another, unless otherwise specified. Similarly, modifiers similar to "about", "approximately" or "approximately" that occur before a numerical term herein typically include the same number, and their specific meaning should be read in conjunction with the context. Similarly, unless a specific number of a claim recitation is intended to cover both the singular and the plural, and also that claim may include both the singular and the plural.
In the description of the specific embodiments above, the use of the directional terms "upper", "lower", "left", "right", "top", "bottom", "vertical", "transverse", and "lateral", etc., are for convenience of description only and should not be considered limiting.
A preferred embodiment of the present invention provides a single-tank molten salt heating system, as shown in fig. 1, including: the system comprises a molten salt storage tank 1, a shell-and-tube heat exchanger 2 and a first water storage tank 3, wherein the molten salt storage tank 1 is communicated with a pipeline in the shell-and-tube heat exchanger 2, so that high-temperature liquid molten salt in the molten salt storage tank 1 circularly flows in the pipeline in the shell-and-tube heat exchanger 2.
The shell of the shell-and-tube heat exchanger 2 is sequentially communicated with the first water storage tank 3 and the heat users 6 and 7, so that water in the shell of the shell-and-tube heat exchanger 2 and high-temperature liquid molten salt in the shell-and-tube heat exchanger 2 sequentially enter the first water storage tank 3 and the heat users 6 and 7 after heat exchange and temperature rise, and then sequentially return to the first water storage tank 3 to form closed-loop circulation.
In the embodiment, the water heater also comprises a second water storage tank 4, wherein the second water storage tank 4 is communicated with the first water storage tank 3, and the second water storage tank 4 is communicated with hot users 6 and 7; and
a solar collector 8, which is communicated with the heat users 6 and 7; the solar heat collector 8 is respectively communicated with the first water storage tank 3 and the second water storage tank 4.
A salt inlet pipeline Y1 and a salt return pipeline Y2 are respectively arranged between the molten salt storage tank 1 and the shell-and-tube heat exchanger 2, a first one-way electromagnetic valve c1 is arranged on the salt return pipeline Y2, and the molten salt is heated by utilizing the night valley electricity, so that the water in the shell-and-tube heat exchanger 2 is pumped into the first water storage tank 3 after heat exchange.
A first water inlet pipeline G1 and a first water return pipeline R1 are respectively arranged between the first water storage tank 3 and the shell-and-tube heat exchanger 2, a second one-way electromagnetic valve c2 is arranged on the first water return pipeline R1, and water after heat exchange is pumped into the first water storage tank 3; if the water in the first water storage tank 3 does not reach the set temperature, the second one-way electromagnetic valve c2 is opened, and the water after heat exchange returns to the shell-and-tube heat exchanger 2 through the first water return pipeline R1 to continue heat exchange; the circulation is repeated until the water in the first water storage tank 3 reaches the set temperature.
A second water inlet pipeline G2 is arranged between the first water storage tank 3 and the second water storage tank 4, a third one-way electromagnetic valve c3 is arranged on the second water inlet pipeline, and when the water in the first water storage tank 3 reaches the set temperature, the third one-way electromagnetic valve c3 is opened to enable the water reaching the set temperature to enter the second water storage tank 4.
A third water inlet line G3 is provided between the second water storage tank 4 and the hot users 6 and 7, a fourth one-way solenoid valve c4 is provided on the third water inlet line G3 (when there is only one hot user), and the fourth one-way solenoid valve c4 is opened when the hot user 6 uses hot water so that the hot water flows out of the second water storage tank 4. If a plurality of hot users exist, each hot user can be correspondingly provided with a fourth one-way electromagnetic valve. In this embodiment, user 6 sets solenoid valve c4-1 correspondingly, user 7 sets solenoid valve c4-2 correspondingly, and user 6 is connected in parallel with user 7.
A second water return pipe R2 is provided between the hot users 6 and 7 and the first water storage tank 3, and a third water return pipe R3 is provided between the hot users 6 and 7 and the solar heat collector 8; a first three-way electromagnetic valve sc1 is connected to the intersection of the second water return line R2 and the third water return line R3: when sunlight is sufficient, the backwater passes through a first three-way electromagnetic valve sc1 and enters the solar heat collector 8 through a third backwater pipeline R3; when sunlight is insufficient, the backwater enters the first water storage tank 3 through the first three-way electromagnetic valve sc1 and the second backwater pipeline R2.
A fourth water inlet pipeline G4 and a fourth water return pipeline R4 are respectively arranged between the solar heat collector 8 and the first water storage tank 3, and a fifth water inlet pipeline G5 is arranged between the solar heat collector 8 and the second water storage tank 4; a fifth one-way solenoid valve c5 is arranged on the fourth water return pipe R4; a second three-way electromagnetic valve sc2 is arranged at the intersection of the fourth water inlet pipeline G4 and the fifth water inlet pipeline G5: when the backwater is heated in the solar heat collector 8 and the set temperature is not reached, the backwater enters the first water storage tank 3 through the second three-way electromagnetic valve sc2 through the fourth water inlet pipe G4 and then enters the solar heat collector 8 through the fourth water return pipe R4 for circulating heating; when the set temperature is reached, the water directly enters the second water storage tank 4 through a second three-way electromagnetic valve sc2 and a fifth water inlet pipe G5.
When the sunlight is sufficient, the fifth one-way solenoid valve c5 and the second three-way solenoid valve sc2 are in an open state; the fifth one-way solenoid valve c5 and the second three-way solenoid valve sc2 are in a closed state when sunlight is insufficient.
Through the structure, the molten salt storage tank can store heat and supply heat at the low valley electricity period at night, the molten salt storage tank is heated through valley electricity and stores the heat in the molten salt, meanwhile, the molten salt loop circulation and the water heating loop are opened, hot water reaching the set temperature is stored in the first storage tank and used by a user, return water returns to the first storage tank along the loop to continue heating to complete the heating circulation, the solar thermal collector is not opened at night, and the electromagnetic valve and the pump connected with the solar thermal collector are both closed; only heating and not heating the fused salt storage tank in the off-peak electricity period, closing the electric heater, opening the rear fused salt loop circulation and the heating circulation, opening a valve and a pump connected with the solar heat collector to supplement energy to the system if the light is good, and closing the system if the light is not good
In this embodiment, the molten salt storage tank 1 is provided with an electric heater 9 inside for heating the molten salt. The electric heaters 9 are uniformly distributed in the molten salt storage tank. A thermocouple 10 is arranged on the tank body of the molten salt storage tank 1 in the height direction of the tank body and is used for measuring the temperature of the molten salt in the molten salt storage tank 1; the electric heating system further comprises an electric heating controller 5, the thermocouple 10 is electrically connected with the electric heater 9 through the electric heating controller 5, the electric heating controller 5 obtains the temperature of the molten salt collected by the thermocouple 10, and the electric heater 9 is controlled to enable the molten salt to reach the preset temperature. The measuring points of the thermocouples 10 are uniformly distributed on the central axis of the molten salt storage tank. The molten salt storage tank 1 is connected with the electric heating controller 2, the electric heaters 9 are inserted from the upper part of the molten salt storage tank 1 and are uniformly arranged in the molten salt storage tank 1, the thermocouples 10 are uniformly arranged on the side surface of the molten salt storage tank 1 from top to bottom, so that more accurate temperature of the molten salt in the molten salt storage tank 1 can be obtained, measuring points are all arranged on the central axis of the molten salt storage tank 1, the connecting wires of the measuring points are connected with the electric heating controller 5, the molten salt in the molten salt storage tank 1 is heated by the control of the electric heaters 9, the temperature of the molten salt is not lower than the melting point temperature of the molten salt, and the molten salt is heated by; the high-temperature liquid molten salt in the molten salt storage tank 1 is driven by a molten salt pump to enter the shell-and-tube heat exchanger 2 for heat exchange and then returns to the molten salt storage tank 1 to form molten salt loop circulation.
The upper part of the first water storage tank 3 is also provided with an automatic water replenishing device (not shown in the figure) for automatically replenishing water to the first water storage tank 3. The first water tank 3 has a buffer function, the second water tank 4 is equivalent to a constant temperature water tank, and hot water reaching the use temperature is stored in the second water tank 4.
The utility model discloses a single-tank fused salt heating system is at the low ebb electricity period at night, fused salt storage tank 1 both stores the heat and supplies heat, fused salt storage tank 1 is through millet electric heating and with the heat storage in the fused salt, fused salt loop circulation and water heating loop open simultaneously and will reach the hot water storage of settlement temperature and use in heat supply user 6 and 7 in homothermal second storage water tank 4, the return water then returns to and continues to heat in the first storage water tank 3 that is used as the buffering and accomplishes the heating circulation, do not open solar collector 8 night, solenoid valve and the pump that is connected with it are all closed; and in the off-peak electricity period, the fused salt storage tank 1 only supplies heat and does not heat, the electric heaters 9 are all closed, the rear fused salt loop circulation and the heating circulation are started, if the light is good, a valve and a pump connected with the solar heat collector 8 are started to supplement the energy of the system, and if the light is not good, the system is closed.
The solar collector 8 supplements energy to the single-tank molten salt heating system, and in order to obtain the reduction amount of the molten salt and the volume reduced by the molten salt storage tank 1, the heat storage amount of the system is obtained through the house heat load q, the house area A, the heating time, the off-peak electricity time t and the energy storage efficiency eta, and the heat storage amount is as follows:
Q＝q·A·t·η
then calculating the usage amount of the molten salt according to the inlet temperature tj, the outlet temperature tc and the specific heat c of the molten salt, wherein the low-melting-point molten salt flows into and out of the molten salt-water heat exchanger, and the usage amount is as follows:
and obtaining the supplemented total energy according to the daily radiant quantity q ' of a certain region, the effective area A ' and the quantity n of the selected heat collector and the heat efficiency eta ' of the heat collector, and the formula is as follows:
Qb＝q′·A′·n·η′
the energy which should be actually stored by the molten salt storage tank 1 is obtained by subtracting the total energy which can be supplemented by the solar heat collector 8 from the heat storage amount, namely:
Qs＝Q-Qb
the amount of molten salt actually used is thus calculated, as follows:
the quality of the reduction of the molten salt by supplementing energy using the solar collector 8 can be obtained by comparison, namely:
m″＝m-m′
meanwhile, the percentage of the reduction of the molten salt can be calculated, and the reduction of the volume of the molten salt storage tank 1 can be obtained through the density of the molten salt. In this embodiment, the solar collectors 8 are connected in parallel.
Another preferred embodiment of the present invention provides a single-tank molten salt heating system, as shown in fig. 2, which is different from the above embodiments in that: the single-tank molten salt heating system comprises a molten salt storage tank 1, a shell-and-tube heat exchanger 2 and a first water storage tank 3,
the molten salt storage tank 1 is communicated with a shell in the shell-and-tube heat exchanger 2, so that the high-temperature liquid molten salt in the molten salt storage tank 1 circularly flows in the shell-and-tube heat exchanger 2;
the pipeline of the shell-and-tube heat exchanger 2 is sequentially communicated with the first water storage tank 3 and the heat users 6 and 7, so that water in the pipeline of the shell-and-tube heat exchanger 2 and high-temperature liquid molten salt in the shell-and-tube heat exchanger 2 sequentially enter the first water storage tank 3 and the heat users 6 and 7 after heat exchange and temperature rise, and then sequentially return to the first water storage tank 3 to form closed-loop circulation.
In the above embodiments, the one-way solenoid valve and the three-way solenoid valve are both connected to the control cabinet for controlling the opening and closing of the valve.
Compared with the prior art, the utility model provides a single-tank fused salt heating system has following advantage:
(1) the system uses a single molten salt storage tank and a solar heat collector for heat supplement, so that the problems of large volume, high manufacturing cost, high maintenance cost and the like of the molten salt storage tank are solved;
(2) the system improves the heat exchange efficiency of the molten salt and reduces the flow loss of water by the indirect heat exchange mode between the molten salt-water heat exchanger and the water.
Although particular embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are examples only and that the scope of the present invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are all within the scope of the invention.
Claims (16)
1. The utility model provides a single-tank molten salt heating system which characterized in that, includes molten salt storage tank, shell and tube type heat exchanger, first storage water tank, wherein:
the molten salt storage tank is communicated with a pipeline in the shell-and-tube heat exchanger, so that the high-temperature liquid molten salt in the molten salt storage tank circularly flows in the pipeline in the shell-and-tube heat exchanger;
the shell of the shell-and-tube heat exchanger is sequentially communicated with the first water storage tank and the heat consumer, so that water in the shell of the shell-and-tube heat exchanger and high-temperature liquid molten salt in the shell-and-tube heat exchanger sequentially enter the first water storage tank and the heat consumer after heat exchange and temperature rise, and then sequentially return to the first water storage tank to form closed-loop circulation.
2. A single-tank molten salt heating system is characterized by comprising a molten salt storage tank, a shell-and-tube heat exchanger and a first water storage tank,
the molten salt storage tank is communicated with a shell in the shell-and-tube heat exchanger, so that the high-temperature liquid molten salt in the molten salt storage tank circularly flows in the shell-and-tube heat exchanger;
the pipeline of the shell-and-tube heat exchanger is sequentially communicated with the first water storage tank and the heat consumer, so that water in the pipeline of the shell-and-tube heat exchanger and high-temperature liquid molten salt in the shell-and-tube heat exchanger sequentially enter the first water storage tank and the heat consumer after heat exchange and temperature rise, and then sequentially return to the first water storage tank to form closed-loop circulation.
3. The single-pot molten salt heating system of claim 1 or 2, further comprising a second water storage tank in communication with the first water storage tank, the second water storage tank in communication with the hot user; and
a solar thermal collector in communication with the thermal user; the solar heat collector is respectively communicated with the first water storage tank and the second water storage tank.
4. The single-tank molten salt heating system according to claim 3, wherein a salt inlet pipeline and a salt return pipeline are arranged between the molten salt storage tank and the shell-and-tube heat exchanger respectively, a first one-way electromagnetic valve is arranged on the salt return pipeline, and the molten salt is heated by using night valley electricity, so that water in the shell-and-tube heat exchanger is pumped into the first water storage tank after heat exchange.
5. The single-tank molten salt heating system according to claim 4, wherein a first water inlet pipeline and a first water return pipeline are arranged between the first water storage tank and the shell-and-tube heat exchanger respectively, a second one-way electromagnetic valve is arranged on the first water return pipeline, and water after heat exchange is pumped into the first water storage tank; if the water in the first water storage tank does not reach the set temperature, the second one-way electromagnetic valve is opened, and the water after heat exchange returns to the shell-and-tube heat exchanger through the first water return pipeline to continue heat exchange; and circulating until the water in the first water storage tank reaches the set temperature.
6. The single-tank molten salt heating system according to claim 5, wherein a second water inlet pipeline is arranged between the first water storage tank and the second water storage tank, a third one-way electromagnetic valve is arranged on the second water inlet pipeline, and when water in the first water storage tank reaches a set temperature, the third one-way electromagnetic valve is opened so that the water reaching the set temperature enters the second water storage tank.
7. The single-tank molten salt heating system according to claim 6, wherein a third water inlet pipeline is arranged between the second water storage tank and the hot user, a fourth one-way solenoid valve is arranged on the third water inlet pipeline, and when the hot user uses hot water, the fourth one-way solenoid valve is opened to enable the hot water to flow out of the second water storage tank; a second water return pipeline is arranged between the hot user and the first water storage tank, and a third water return pipeline is arranged between the hot user and the solar heat collector; the second return water pipeline and the third return water pipeline are intersected and connected to form a first three-way electromagnetic valve: when sunlight is sufficient, backwater passes through the first three-way electromagnetic valve and enters the solar thermal collector after passing through the third backwater pipeline; when sunlight is insufficient, backwater passes through the first three-way electromagnetic valve and enters the first water storage tank after passing through the second backwater pipeline.
8. The single-tank molten salt heating system according to claim 7, wherein a fourth water inlet pipeline and a fourth water return pipeline are arranged between the solar thermal collector and the first water storage tank respectively, and a fifth water inlet pipeline is arranged between the solar thermal collector and the second water storage tank; a fifth one-way electromagnetic valve is arranged on the fourth water return pipeline; the fourth water inlet pipeline and the fifth water inlet pipeline are connected with each other, and a second three-way electromagnetic valve is arranged at the joint of the fourth water inlet pipeline and the fifth water inlet pipeline: when the returned water is heated in the solar thermal collector and does not reach the set temperature, the returned water enters the first water storage tank through the fourth water inlet pipe through the second three-way electromagnetic valve and then enters the solar thermal collector through the fourth water return pipe for cyclic heating; when the set temperature is reached, the water directly enters the second water storage tank through the second three-way electromagnetic valve and the fifth water inlet pipe.
9. The single-pot molten salt heating system according to claim 8, wherein the fifth one-way solenoid valve and the second three-way solenoid valve are in an open state when sunlight is sufficient; and when the sunlight is insufficient, the fifth one-way electromagnetic valve and the second three-way electromagnetic valve are in a closed state.
10. The single-tank molten salt heating system according to claim 1 or 2, characterized in that an electric heater is provided inside the molten salt storage tank for heating molten salt.
11. The single-pot molten salt heating system according to claim 10, wherein a thermocouple is provided on a pot body of the molten salt storage tank in a height direction thereof, for measuring a temperature of molten salt of the molten salt storage tank;
the electric heating control device obtains the temperature of the molten salt from the thermocouple and controls the electric heater to enable the molten salt to reach the preset temperature.
12. The single-pot molten salt heating system of claim 11, wherein the thermocouple points are all on a central axis of the molten salt storage tank.
13. The single-tank molten salt heating system according to claim 1 or 2, wherein an automatic water replenishing device is further arranged at the upper part of the first water storage tank and used for automatically replenishing water to the first water storage tank.
14. The single-pot molten salt heating system of claim 3, wherein the solar collector is plural.
15. The single-pot molten salt heating system as claimed in claim 1 or 2, wherein the heat user is plural.
16. The single-pot molten salt heating system of claim 1 or 2, wherein the plurality of thermal users are connected in parallel.
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| CN201821933341.4U CN209960600U (en) | 2018-11-22 | 2018-11-22 | Single-tank molten salt heating system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109323320A (en) * | 2018-11-22 | 2019-02-12 | 上海电气集团股份有限公司 | A kind of list tank fused salt heating system |
| CN111396977A (en) * | 2020-03-27 | 2020-07-10 | 南京理工大学 | Station radiation heating system and control method thereof |
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2018
- 2018-11-22 CN CN201821933341.4U patent/CN209960600U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109323320A (en) * | 2018-11-22 | 2019-02-12 | 上海电气集团股份有限公司 | A kind of list tank fused salt heating system |
| CN111396977A (en) * | 2020-03-27 | 2020-07-10 | 南京理工大学 | Station radiation heating system and control method thereof |
| CN111396977B (en) * | 2020-03-27 | 2021-06-18 | 南京理工大学 | Station radiation heating system and control method thereof |
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