CN116294740A - Pressure stabilizing device and pressure stabilizing method suitable for high-capacity heat storage water tank - Google Patents

Abstract

The embodiment of the application provides the pressure stabilizing device and the pressure stabilizing method suitable for the high-capacity heat storage water tank, the pressure is regulated by controlling the steam density at the upper part of the heat storage body, the pressure fluctuation caused by flow deviation of high-temperature water and low-temperature water can be effectively eliminated, the manual intervention workload is reduced, the pressure in the heat storage body is safe and stable, the advantages of low heat loss, low running cost and few running components are achieved, and the pressure stabilizing device and the pressure stabilizing method can be widely applied to the high-capacity heat storage body.

Description

Pressure stabilizing device and pressure stabilizing method suitable for high-capacity heat storage water tank

Technical Field

The application relates to the technical field of water heat storage, in particular to a voltage stabilizing device and a voltage stabilizing method suitable for a large-capacity heat storage water tank.

Background

The heat storage technology can solve the problem of mismatching of the thermal energy preparation and use processes in space and time, is a very important technology for improving the energy utilization efficiency, can be generally divided into three types of sensible heat, latent heat, thermochemical heat storage and the like, sensible heat storage media are represented by water, heat conduction oil, molten salt, concrete, gravel and the like, latent heat storage media are represented by steam, phase change materials and the like, and thermochemical heat storage media are mainly magnesium oxide, ferric oxide, metal hydride and other substances capable of carrying out heat absorption/heat release chemical reactions. At present, sensible heat and latent heat storage technologies are mature in development, and thermochemical heat storage technologies are in the early stage of commercial application.

The water heat storage technology is a low-cost pollution-free sensible heat storage technology, is widely applied to solar water heater systems, utilizes the temperature difference and the characteristic of large specific heat capacity of water to store heat, and generally has the heat storage temperature not exceeding 95 ℃ because the saturation temperature of water is lower. The large-capacity water heat storage technology is to build a large storage tank to store hot water, and the volume is usually 5000-20000m ³ The heat storage body is only one in scope, and the two are prevented from being mixed through the inclined temperature layer between the high-temperature water and the low-temperature water, so that the heat storage body is widely applied to a cogeneration unit and a garbage power station, the stored heat is mainly used for building heating, the thermoelectric decoupling capacity of the unit can be improved, and the electric load adjusting range of the unit is enlarged. Because there is only one large-capacity heat storage body in the system, when the temperature of the internal water is changed as a whole, the pressure at the upper part of the heat storage body is changed correspondingly, the pressure is required to be regulated continuously to be stable, the safety of the tank body is ensured, the conventional nitrogen sealing system is required to continuously prepare nitrogen and intermittently emit steam outwards, the heat loss is high, and the operation cost is high.

Disclosure of Invention

Aiming at the prior art, at least one technical problem is solved, and the embodiment of the application provides the pressure stabilizing device and the pressure stabilizing method suitable for the high-capacity heat storage water tank, which can effectively eliminate pressure fluctuation caused when high-temperature water and low-temperature water generate flow deviation by controlling the steam density at the upper part of the heat storage body, reduce the workload of manual intervention, ensure that the pressure in the heat storage body is safe and stable, have the advantages of low heat loss, low running cost and few running parts, and can be widely applied to the high-capacity heat storage water tank.

According to a first aspect of the present application, there is provided a pressure stabilizing device suitable for a high-capacity hot-water storage tank, comprising

The heat storage body comprises a lower chamber and an upper chamber which are respectively used for accommodating cold working medium and hot working medium and are mutually communicated; the upper chamber is communicated with a ventilation assembly; the ventilation assembly comprises a ventilation pipeline which is communicated with the upper chamber and air respectively and is provided with an electric control valve, and the ventilation pipeline is opened intermittently for discharging non-condensable gas in the upper chamber;

a heat exchange assembly; the lower chamber and the upper chamber are respectively connected with the heat exchange assembly through a first pipeline group and a second pipeline group in a heat exchange manner; under different working conditions, the first pipeline group is used for inputting or outputting cold working media to the lower chamber; the second pipeline group inputs or outputs a hot working medium to the upper chamber; and

a condenser assembly; the condensing device comprises a condensing passage provided with a condensing water pump, wherein the lower chamber is communicated with the upper chamber through the condensing passage, and is used for inputting a cold working medium of the lower chamber into the upper chamber and controlling the condensing speed of steam in the upper chamber.

In some embodiments, the first tubing set includes a first outlet tubing and a first return tubing; the first liquid outlet pipeline is respectively connected with the lower cavity and the cold side inlet of the heat exchange assembly and is used for conveying cold working medium in the lower cavity to the cold side of the heat exchange assembly; the first liquid outlet pipeline is connected in parallel to the first liquid return pipeline, and the first liquid return pipeline is used for shunting backwater of the low-temperature heat network which is introduced into the cold side of the heat exchange assembly and introducing the backwater into the lower cavity.

In some embodiments, the first liquid outlet pipeline comprises a second valve, a first heat storage water pump and a third valve which are sequentially arranged according to the flowing direction of the cold working medium; a fourth valve is arranged on the first liquid return pipeline; and two ends of the fourth valve are respectively connected with the inlet of the second valve and the outlet of the third valve.

In some embodiments, the second tubing set includes a second outlet tubing and a second return tubing; the second liquid outlet pipeline is respectively connected with the upper chamber and the hot side outlet of the heat exchange assembly and is used for conveying the hot working medium in the upper chamber to the hot side outlet of the heat exchange assembly; the second liquid outlet pipeline is connected in parallel to the second liquid return pipeline, and the second liquid return pipeline is used for shunting hot side water outlet of the heat exchange assembly and introducing the hot side water outlet into the upper cavity.

In some embodiments, the second liquid outlet pipeline comprises a fifth valve, a second heat storage water pump and a sixth valve which are sequentially arranged according to the flowing direction of the hot working medium; a first valve is arranged on the second liquid return pipeline; and two ends of the first valve are respectively connected with the inlet of the fifth valve and the outlet of the sixth valve.

In some embodiments, the second liquid outlet line and the first liquid outlet line share a single heat storage water pump.

In some embodiments, the heat exchange assembly includes a heating pump and a heating grid heater; the heating pump boosts the backwater of the low-temperature heat supply network and then leads the backwater to the cold side of the heat supply network heater; and the hot side of the heat supply network heater is filled with steam.

In some embodiments, the condenser assembly further comprises a condenser; wherein a condensing passageway communicates with a cold side of the condenser; and the steam in the upper chamber flows back into the upper chamber after heat exchange on the hot side of the condenser.

In some embodiments, the vent assembly further comprises a vent chamber disposed on the vent line; the input end of the exhaust chamber is connected with the hot side outlet of the condenser, and the output end of the exhaust chamber is communicated with the upper chamber.

In some embodiments, a pressure measurement point is disposed on the upper chamber for measuring the pressure within the upper chamber.

According to a second aspect of the present application, a voltage stabilizing method suitable for a high-capacity hot-water storage tank is provided, and the voltage stabilizing device in any of the above embodiments is used for voltage stabilization, including the following procedures:

and (3) heat storage process: the low-temperature water of the lower chamber is communicated with the low-temperature heat network backwater through the first pipeline group and is heat exchanged by the heat exchange component, and the generated high-temperature water is respectively conveyed to the user and the upper chamber; when the pressure in the heat storage body is increased, low-temperature water in the lower chamber is introduced into the condenser assembly for cooling steam in the upper chamber and reducing the steam density; when the upper chamber has non-condensable gas, opening an electric control valve to reduce the pressure of the upper chamber;

exothermic process: the low-temperature heat-net backwater is respectively introduced into the lower cavity and the heat exchange component for heat exchange; the high-temperature water generated by the heat exchange assembly and the high-temperature water in the upper chamber are jointly conveyed to a user; when the pressure in the upper chamber of the heat storage body is continuously reduced to reach a threshold value affecting the safety of equipment, the electric control valve is opened to introduce air into the upper chamber so as to ensure stable pressure.

Additional aspects and advantages of the application 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 application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

fig. 1 is a schematic structural diagram of a pressure stabilizing device suitable for a high-capacity hot-water storage tank according to an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a pressure stabilizing device for high-capacity water storage according to another embodiment of the present application;

fig. 3 is a schematic structural diagram of a pressure stabilizing device suitable for a high-capacity hot-water storage tank according to another embodiment of the present application;

fig. 4 is a schematic structural diagram of a pressure stabilizing device suitable for a high-capacity hot-water storage tank according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a pressure stabilizing device suitable for a high-capacity hot-water storage tank according to another embodiment of the present application;

FIG. 6 is a flow chart of a method for stabilizing pressure suitable for a high-capacity hot-water storage tank according to an embodiment of the present application;

in the figure, 1, a heat storage body; 2. a heat storage water pump; 21. a first heat storage water pump; 22. a second heat storage water pump; 3. a heating pump; 4. a heating network heater; 5. a condenser; 6. an exhaust chamber; 7. a condensate pump; 8. a first valve; 9. a second valve; 10. a third valve; 11. a fourth valve; 12. a fifth valve; 13. a sixth valve; 14. an electric control valve; 15. and (5) measuring a pressure point.

Detailed Description

In order to better understand the embodiments of the present application, the following description will clearly and completely describe the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments, and are not intended to limit the scope of the disclosure of the present application. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the concepts disclosed herein. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.

A schematic structural diagram according to an embodiment of the present disclosure is shown in the drawings. The figures are not drawn to scale, wherein certain details are exaggerated for clarity of presentation and may have been omitted. The shapes of the various regions, layers and their relative sizes, positional relationships shown in the drawings are merely exemplary, may in practice deviate due to manufacturing tolerances or technical limitations, and one skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions as actually required.

The embodiment of the present application is described below with reference to fig. 1, specifically, the embodiment of the present application proposes a pressure stabilizing device suitable for a high-capacity hot-water storage tank, and the pressure stabilizing device includes a heat storage body 1, a heat exchange assembly and a condenser assembly; the heat storage body 1 has a certain volume and can contain working media, and because the volume of the heat storage body 1 is larger, the working media at different positions in the up-down direction are different in temperature, so that the heat storage body 1 can be divided into a lower chamber and an upper chamber which are respectively used for containing cold working media and hot working media, no barrier exists between the lower chamber and the upper chamber, the working media between the two chambers can circulate mutually, but the working media circulation quantity between the two chambers is less, and generally, the temperature of the hot working media in the upper chamber is generally higher than the temperature of the cold working media in the lower chamber.

In the embodiment, the lower chamber and the upper chamber are respectively connected with the heat exchange component through a first pipeline group and a second pipeline group in a heat exchange way; the lower chamber is provided with a through hole for inputting and outputting cold working medium, and the upper chamber is provided with a through hole for inputting and outputting hot working medium; the lower cavity is in heat exchange connection with the heat exchange assembly through the first pipeline group, and the upper cavity is in heat exchange connection with the heat exchange assembly through the second pipeline group, so that the input and output of a cold working medium and a hot working medium can be realized under different heat storage or heat release working conditions of the heat storage body 1, and the heat storage and release can be realized. In addition, the upper chamber is communicated with a ventilation component; the vent assembly comprises a vent pipeline, two ends of the vent pipeline are respectively communicated with the upper chamber and air, the vent pipeline is provided with an electric control valve 14, and the electric control valve 14 can be opened intermittently to discharge non-condensable gas in the upper chamber and air is introduced into the upper chamber.

The condenser assembly in this embodiment includes a condensation passage provided with a condensate pump 7, and the lower chamber and the upper chamber are communicated through the condensation passage, so as to input the cold working medium of the lower chamber into the upper chamber and control the condensation speed of the steam in the upper chamber. In other words, the cold working medium in the lower chamber can enter the condensing passage through the delivery of the condensing water pump 7, so that the cold working medium is delivered to the upper chamber, the steam above the liquid level of the upper chamber is cooled, the density of the steam is reduced, and the purpose of controlling the condensing speed of the steam in the upper chamber is realized.

In the heat storage process in this embodiment, the following steps are adopted: the low-temperature water of the lower chamber enters the cold side of the heat exchange assembly through the first pipeline group, and meanwhile, the cold side of the heat exchange assembly is introduced into a low-temperature heat network for backwater; during this process the hot side of the heat exchange assembly is steamed. After heat exchange, one part of high-temperature water at the cold side outlet of the heat supply network heater 4 is delivered to a user for heat supply, and the other part of the high-temperature water enters the upper chamber through the second pipeline group for storage. Along with the progress of heat accumulation process, the whole temperature of working medium in heat accumulation body 1 risees, and the volume of medium of the same quality grow, leads to the pressure that the liquid level was above in heat accumulation body 1 to rise, lets in the upper chamber with the low temperature water of lower cavity in this moment through the condensation passageway for the steam above the cooling upper chamber liquid level, reduce steam density. When the upper chamber is in the presence of non-condensable gas, the electric control valve 14 is intermittently opened through the vent line for discharging the non-condensable gas in the upper chamber.

In the exothermic process of this example: and part of the low-temperature heat-exchange-component backwater enters the lower cavity through the first pipeline group, the other part of the low-temperature heat-exchange-component backwater directly enters the cold-side inlet of the heat exchange component, steam is introduced into the hot side of the heat exchange component to heat the low-temperature heat-exchange-component backwater, high-temperature water at the cold-side outlet of the heat exchange component is directly conveyed to a user for heat supply, and the high-temperature water in the upper cavity is mixed with the high-temperature water at the cold-side outlet of the heat exchange component through the second pipeline group and is conveyed to the user for heat supply. Along with the progress of exothermic process, the whole temperature in the heat accumulation body 1 reduces, and the volume of water of the same quality can become less, leads to the pressure reduction more than the liquid level in the heat accumulation body 1, because upper portion of the cavity is 95 ℃ or so high temperature water, when the pressure reduction more than the liquid level of heat accumulation body 1, the steam density in the space can be improved by automatic evaporation of high temperature water, generally need not to start the condenser subassembly, when the pressure of upper cavity obviously reduces and reaches the threshold value that influences equipment safety, can let in air in the upper cavity and guarantee that pressure is steady. Therefore, in this embodiment, the condensation speed of the steam in the upper cavity of the heat storage body 1 is controlled to adjust the steam pressure in the heat storage body 1, so as to control the space pressure of the heat storage body 1, avoid the steam leakage and have low operation cost.

In some embodiments, the first tubing set includes a first outlet tubing and a first return tubing; the first liquid outlet pipeline is respectively connected with the lower cavity and the cold side inlet of the heat exchange assembly and is used for conveying cold working medium in the lower cavity to the cold side of the heat exchange assembly; the first liquid outlet pipeline is connected in parallel to the first liquid return pipeline, and the first liquid return pipeline is used for shunting the backwater of the low-temperature heat network which is introduced into the cold side of the heat exchange assembly and introducing the backwater into the lower cavity.

The first pipeline group comprises a first liquid outlet pipeline and a first liquid return pipeline; the two ends of the first liquid outlet pipeline are respectively connected with the lower cavity and the cold side inlet of the heat exchange assembly and are used for conveying cold working media in the lower cavity to the cold side inlet of the heat exchange assembly. In other words, the input end of the first liquid outlet pipeline is connected with the lower chamber, the cold working medium in the lower chamber can be introduced into the first liquid outlet pipeline, the output end of the first liquid outlet pipeline is connected with the cold side inlet of the heat exchange assembly, the cold working medium in the lower chamber enters the cold side of the heat exchange assembly, and the heat exchange between the cold working medium and the working medium on the hot side of the heat exchange assembly is realized. Meanwhile, in the embodiment, the first liquid outlet pipeline is connected in parallel to the first liquid return pipeline, namely, the first liquid return pipeline shunts the low-temperature heat-net backwater introduced at the cold side inlet of the heat exchange assembly, and the low-temperature heat-net backwater part at the cold side inlet of the heat exchange assembly is input into the lower chamber through the first liquid return pipeline.

As shown in fig. 1, according to the flowing direction of the cold working medium, a second valve 9, a first heat storage water pump 21 and a third valve 10 are sequentially arranged on the first liquid outlet pipeline; a fourth valve 11 is arranged on the first liquid return pipeline; the inlet of the fourth valve 11 is connected to the outlet of the third valve 10, and the outlet of the fourth valve 11 is connected to the inlet of the second valve 9.

In some embodiments, the second tubing set includes a second outlet tubing and a second return tubing; the second liquid outlet pipeline is respectively connected with the upper chamber and the hot side outlet of the heat exchange assembly and is used for conveying the hot working medium in the upper chamber to the hot side outlet of the heat exchange assembly; the second liquid outlet pipeline is connected in parallel to the second liquid return pipeline, and the second liquid return pipeline is used for shunting the hot side water outlet of the heat exchange assembly and introducing the hot side water outlet into the upper cavity.

The second pipeline group comprises a second liquid outlet pipeline and a second liquid return pipeline; and two ends of the second liquid outlet pipeline are respectively connected with the upper cavity and the cold side outlet of the heat exchange assembly and are used for conveying the hot working medium in the upper cavity to the cold side outlet of the heat exchange assembly. In other words, the input end of the second liquid outlet pipeline is connected with the upper cavity, the hot working medium in the upper cavity can be introduced into the second liquid outlet pipeline, the output end of the second liquid outlet pipeline is connected with the cold side outlet of the heat exchange assembly, the hot working medium in the upper cavity enters the cold side outlet of the heat exchange assembly, and the hot working medium and the working medium at the cold side outlet of the heat exchange assembly are output together to a user for heat supply. Meanwhile, in the embodiment, the second liquid outlet pipeline is connected in parallel with the second liquid return pipeline, namely, the low-temperature heat-exchange heat-net backwater output at the cold side outlet of the heat exchange assembly is partially input into the upper cavity through the second liquid return pipeline.

As shown in fig. 1, according to the flowing direction of the hot working medium, a fifth valve 12, a second heat storage water pump 22 and a sixth valve 13 are sequentially arranged on the second liquid outlet pipeline; a first valve 8 is arranged on the second liquid return pipeline; the inlet of the first valve 8 is connected to the outlet of the sixth valve 13 and the outlet of the first valve 8 is connected to the inlet of the fifth valve 12.

In some embodiments, the second outlet line and the first outlet line share one heat storage water pump 2.

In this embodiment, the second liquid outlet pipeline and the first liquid outlet pipeline share one heat storage water pump 2 as shown in fig. 2, that is, the second heat storage water pump 22 and the first heat storage water pump 21 may be alternatively used, that is, the pipelines provided with the second heat storage water pump 22 and the first heat storage water pump 21 are combined, and the heat storage water pump 2 is provided on the combined pipelines, and the heat storage water pump 2 is started by opening the fifth valve 12 and the sixth valve 13 and the second valve 9 and the third valve 10, so as to achieve the purpose of pumping cold working medium or hot working medium under different working conditions. In this embodiment, the second liquid outlet pipeline and the first liquid outlet pipeline share one heat storage water pump 2, so that the setting of pump components and the connection of pipelines can be reduced, the control and management processes are convenient, and the operation components are fewer and the operation cost is low.

In some embodiments, the heat exchange assembly includes a heating pump 3 and a heating grid heater 4; the heating pump 3 boosts the backwater of the low-temperature heat supply network and then leads the backwater to the cold side of the heat supply network heater 4; the hot side of the grid heater 4 is steamed.

The heat exchange assembly comprises a heating pump 3 and a heat supply network heater 4, wherein an outlet of the heating pump 3 is connected with a cold side inlet of the heat supply network heater 4, and low-temperature heat supply network backwater enters the cold side of the heat supply network heater 4 after being boosted by the heating pump 3. It can be known that the heat supply network heater 4 includes a cold side and a hot side, where the cold side and the hot side are respectively fed with media with different temperatures for heat exchange, and in this embodiment, the low-temperature heat supply network backwater is boosted by the heating pump 3 and then enters the cold side of the heat supply network heater 4, and exchanges heat with steam on the hot side of the heat supply network heater 4, so as to achieve the effect of heating the low-temperature heat supply network backwater.

In some embodiments, further comprising a condenser 5; wherein the condensing passageway communicates with the cold side of the condenser 5; the steam in the upper chamber flows back into the upper chamber after heat exchange on the hot side of the condenser 5.

Wherein the lower chamber, the condensate pump 7, the cold side of the condenser 5 and the upper chamber are sequentially connected to form a condensation passage; it can be seen that the cold working medium in the lower chamber is introduced into the cold side of the condenser 5 after passing through the condensate pump 7, and is introduced into the upper chamber after being heated after heat exchange. In the process the steam in the upper chamber passes through the hot side of the condenser 5 back into the upper chamber as shown in figure 3.

Preferably, the upper chamber is provided with a pressure measurement point 15 as shown in fig. 5 for measuring the pressure in the upper chamber. According to the embodiment, the flow rate of the condensate pump 7 can be adjusted according to the data change of the pressure measuring point 15, part of low-temperature water in the lower chamber is conveyed to the condenser 5 for cooling steam above the liquid level of the upper chamber, reducing the density of the steam, and the steam is condensed and then flows back to the top of the upper chamber.

In some embodiments, the vent assembly further comprises a vent chamber 6, the vent chamber 6 being disposed on the vent line; the inlet of the exhaust chamber 6 is connected to the hot side outlet of the condenser 5 and the outlet thereof is connected to the upper chamber.

The ventilation assembly further comprises an exhaust chamber 6, wherein the exhaust chamber 6 is arranged on the ventilation pipeline, and steam in the upper chamber flows through the hot side of the condenser 5 and flows back to the upper chamber after being condensed and recovered by the exhaust chamber 6. In the embodiment, the upper chamber is communicated with air, wherein an electric control valve 14 is arranged on a connecting pipeline, and when the non-condensable gas exists in the upper chamber, the non-condensable gas is discharged through the intermittent opening of the electric control valve 14 at the upper part of the exhaust chamber 6; after the upper vapor in the upper chamber has been effectively cooled, the space pressure is reduced.

The embodiment also provides a voltage stabilizing method suitable for the high-capacity hot water storage tank, and the voltage is stabilized by using the voltage stabilizing device in any one of the embodiments, which comprises the following steps of:

s1, heat storage process: the low-temperature water of the lower chamber is communicated with the low-temperature heat network backwater through the first pipeline group and is heat exchanged by the heat exchange component, and the generated high-temperature water is respectively conveyed to the user and the upper chamber; when the pressure in the heat storage body 1 is increased, low-temperature water of the lower chamber is introduced into the condenser assembly for cooling steam in the upper chamber and reducing the steam density; when the upper chamber has non-condensable gas, opening the electric control valve 14 to reduce the pressure of the upper chamber;

s2 exothermic process: the low-temperature heat-net backwater is respectively introduced into the lower cavity and the heat exchange component for heat exchange; the high temperature water generated by the heat exchange component and the high temperature water in the upper chamber are jointly conveyed to a user; when the pressure in the upper chamber of the heat storage body 1 is continuously reduced to reach a threshold value affecting the safety of equipment, the electric control valve 14 is opened, and air is introduced into the upper chamber to ensure the pressure to be stable.

In the specific heat storage process: opening the first valve 8, the second valve 9 and the third valve 10, and closing the fourth valve 11, the fifth valve 12 and the sixth valve 13; the low-temperature heat supply network backwater is boosted by the heating pump 3 and then enters the cold side inlet of the heat supply network heater 4, the low-temperature water in the lower chamber is boosted by the heat storage water pump 2 on the first liquid outlet pipeline and then enters the cold side of the heat supply network heater 4, and the hot side of the heat supply network heater 4 is filled with steam for heating the low-temperature heat supply network backwater and the low-temperature water in the lower chamber. After heat exchange, one part of high-temperature water at the cold side outlet of the heat supply network heater 4 is delivered to a user for heat supply, and the other part of the high-temperature water enters the upper chamber through the first valve 8 for storage through the second liquid return pipeline.

Along with the progress of heat accumulation process, the whole temperature of working medium in heat accumulation body 1 increases, and the volume of medium of the same quality grow, leads to the pressure of heat accumulation body 1 above the liquid level to rise, adjusts the flow of condensate pump 7 according to the data change of pressure measurement station 15 this moment, and the cold side of entering condenser 5 is passed through to partly low-temperature water in the lower cavity and is finally let in the upper cavity in the cold side of condenser 5 for the steam above the cooling upper cavity liquid level, reduction steam density. During the process, the steam above the liquid level of the upper chamber is introduced into the hot side of the condenser 5, and flows back to the upper chamber after being collected in the exhaust chamber 6 after being condensed; when the upper chamber has non-condensable gas, the non-condensable gas is discharged through the intermittent opening of the electric control valve 14 at the upper part of the exhaust chamber 6; after the upper part of the upper chamber is effectively cooled, the space pressure is reduced.

During the exothermic process: closing the first valve 8, the second valve 9 and the third valve 10, and opening the fourth valve 11, the fifth valve 12 and the sixth valve 13; after the pressure of the low-temperature heat supply network backwater is increased by the heating pump 3, one part of backwater enters the lower cavity through the first liquid return pipeline and passes through the fourth valve 11, the other part of backwater directly enters the cold side inlet of the heat supply network heater 4, steam is introduced into the hot side of the heat supply network heater 4 to heat the low-temperature heat supply network backwater, the high-temperature water at the cold side outlet of the heat supply network heater 4 is directly conveyed to a user for heat supply, and the high-temperature water in the upper cavity is mixed with the high-temperature water at the outlet of the heat supply network heater 4 for heat supply after being increased by the heat storage water pump 2. Along with the progress of exothermic process, whole temperature reduces in the heat accumulation body 1, the volume of water of the same quality can become little, lead to the pressure reduction more than the liquid level in the heat accumulation body 1, because upper portion of the cavity is 95 ℃ or so high temperature water, when the pressure reduction more than the liquid level of heat accumulation body 1, the steam density in the space can be improved by automatic evaporation of high temperature water, generally, need not to start condenser 5 and condensate pump 7, when pressure measurement station 15 monitors the pressure of upper cavity obviously to reduce, can open electric control valve 14, let the outside air flow in the upper cavity and pinch, guarantee that the pressure is steady.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., 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 application. In this specification, schematic representations of the above terms are not necessarily directed 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. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims (11)

1. A voltage stabilizing device suitable for a high-capacity hot water storage tank is characterized by comprising

The heat storage body comprises a lower chamber and an upper chamber which are respectively used for accommodating cold working medium and hot working medium and are mutually communicated; the upper chamber is communicated with a ventilation assembly; the ventilation assembly comprises a ventilation pipeline which is communicated with the upper chamber and air respectively and is provided with an electric control valve, wherein the ventilation pipeline is used for intermittently opening the ventilation pipeline for discharging non-condensable gas in the upper chamber;

a heat exchange assembly; the lower chamber and the upper chamber are respectively connected with the heat exchange assembly through a first pipeline group and a second pipeline group in a heat exchange manner; under different working conditions, the first pipeline group is used for inputting or outputting cold working media to the lower chamber; the second pipeline group inputs or outputs a hot working medium to the upper chamber; and

a condenser assembly; the condensing device comprises a condensing passage provided with a condensing water pump, wherein the lower chamber is communicated with the upper chamber through the condensing passage, and is used for inputting a cold working medium of the lower chamber into the upper chamber and controlling the condensing speed of steam in the upper chamber.

2. The pressure regulating device of claim 1, wherein the first line set comprises a first liquid outlet line and a first liquid return line; the first liquid outlet pipeline is respectively connected with the lower cavity and the cold side inlet of the heat exchange assembly and is used for conveying cold working medium in the lower cavity to the cold side of the heat exchange assembly; the first liquid outlet pipeline is connected in parallel to the first liquid return pipeline, and the first liquid return pipeline is used for shunting backwater of the low-temperature heat network which is introduced into the cold side of the heat exchange assembly and introducing the backwater into the lower cavity.

3. The pressure stabilizing device according to claim 2, wherein the first liquid outlet pipeline comprises a second valve, a first heat storage water pump and a third valve which are sequentially arranged according to the flowing direction of the cold working medium; a fourth valve is arranged on the first liquid return pipeline; and two ends of the fourth valve are respectively connected with the inlet of the second valve and the outlet of the third valve.

4. A pressure stabilizing device as claimed in claim 2 or claim 3 wherein said second conduit set comprises a second liquid outlet conduit and a second liquid return conduit; the second liquid outlet pipeline is respectively connected with the upper chamber and the hot side outlet of the heat exchange assembly and is used for conveying the hot working medium in the upper chamber to the hot side outlet of the heat exchange assembly; the second liquid outlet pipeline is connected in parallel to the second liquid return pipeline, and the second liquid return pipeline is used for shunting hot side water outlet of the heat exchange assembly and introducing the hot side water outlet into the upper cavity.

5. The pressure stabilizing device according to claim 4, wherein the second liquid outlet pipeline comprises a fifth valve, a second heat storage water pump and a sixth valve which are sequentially arranged according to the flowing direction of the hot working medium; a first valve is arranged on the second liquid return pipeline; and two ends of the first valve are respectively connected with the inlet of the fifth valve and the outlet of the sixth valve.

6. The pressure regulating apparatus of claim 5, wherein the second liquid outlet line and the first liquid outlet line share a heat storage water pump.

7. The pressure regulating apparatus of claim 4, wherein the heat exchange assembly comprises a heating pump and a heating grid heater; the heating pump boosts the backwater of the low-temperature heat supply network and then leads the backwater to the cold side of the heat supply network heater; and the hot side of the heat supply network heater is filled with steam.

8. The pressure regulating apparatus of claim 4, wherein the condenser assembly further comprises a condenser; wherein a condensing passageway communicates with a cold side of the condenser; and the steam in the upper chamber flows back into the upper chamber after heat exchange on the hot side of the condenser.

9. The pressure regulating device of claim 8, wherein the vent assembly further comprises a vent chamber disposed on the vent line; the input end of the exhaust chamber is connected with the hot side outlet of the condenser, and the output end of the exhaust chamber is communicated with the upper chamber.

10. The pressure regulating device of claim 8, wherein the upper chamber is provided with a pressure measurement point for measuring the pressure in the upper chamber.

11. A voltage stabilizing method suitable for a large-capacity hot water storage tank, which is characterized by utilizing the voltage stabilizing device of any one of claims 1-10 to stabilize voltage, comprising the following steps:

and (3) heat storage process: the low-temperature water of the lower chamber is communicated with the low-temperature heat network backwater through the first pipeline group and is heat exchanged by the heat exchange component, and the generated high-temperature water is respectively conveyed to the user and the upper chamber; when the pressure in the heat storage body is increased, low-temperature water in the lower chamber is introduced into the condenser assembly for cooling steam in the upper chamber and reducing the steam density; when the upper chamber has non-condensable gas, opening an electric control valve to reduce the pressure of the upper chamber;

exothermic process: the low-temperature heat-net backwater is respectively introduced into the lower cavity and the heat exchange component for heat exchange; the high-temperature water generated by the heat exchange assembly and the high-temperature water in the upper chamber are jointly conveyed to a user; when the pressure in the upper chamber of the heat storage body is continuously reduced to reach a threshold value affecting the safety of equipment, the electric control valve is opened to introduce air into the upper chamber so as to ensure stable pressure.

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