CN217082932U - Hot air preheating and purging system - Google Patents

Abstract

Hot-air preheating and purging system belongs to light and heat power station and energy storage power station technical field. The problem of adopt high temperature steam to appear hydrophobic and water hammer as preheating medium among the prior art, also can cause equipment or intraductal rust is solved. The technical points are as follows: the solid heat reservoir is connected with a pipeline to be preheated or equipment to be preheated through a hot air pipeline and a cold air pipeline, the first valve is installed on the hot air pipeline, the second valve and the third valve are installed on the cold air pipeline, and the blower or the compressor is installed on the cold air pipeline and is located between the second valve and the third valve. The utility model discloses utilize solid heat reservoir heated air to carry out the heating coil as the heating coil medium to the heat conduction oil pipe way of conduction oil slot type light and heat power station, avoided the appearance of hydrophobic and water hammer problem, also can not arouse intraductal rust, to conduction oil safety oiling, utilize to abandon wind and abandon light energy, extend the light and heat power station and have the significance in the aspect of the energy storage system ability.

Description

Hot air preheating and purging system

Technical Field

The utility model relates to a preheat and purge system, concretely relates to hot-air preheats and purge system belongs to light and heat power station and energy storage power station technical field.

Background

Thermal conductive media are commonly used in photothermal power stations to receive solar radiation, one of the widely used thermal conductive media being thermal conductive oil. The high-temperature heat conduction oil heats water to generate high-temperature high-pressure steam to drive a steam turbine to generate power, the heat conduction oil commonly used at present is a mixture of biphenyl and diphenyl ether, and the freezing point is about 12 ℃.

For the photo-thermal power station distributed in a region with a higher latitude, the photo-thermal power station is limited by the freezing point of heat conduction oil, oil needs to be injected at a higher temperature of the heat conduction oil, the oil injection temperature which can be provided by a manufacturer is 40-90 ℃, and the higher temperature of the heat conduction oil will obviously increase the potential safety hazard in the oil injection process.

Likewise, heat transfer media are used in energy storage power stations to absorb rejected or other energy, with the widely used heat transfer media being 60% NaNO ₃ And 40% KNO ₃ The solidifying point of the binary molten salt is about 238 ℃. When injecting salt, the fused salt pipeline needs to be preheated to a temperature above the freezing pointAnd the molten salt is prevented from being solidified in the pipeline.

It is thus clear that no matter to light thermal power station or energy storage power station, during the start-up system, all need guarantee that equipment and pipeline temperature are higher than the heat-conducting medium freezing point, need carry out the heating pipe promptly or warm up. The heating pipe technology is widely applied to high-temperature medium working pipelines, and the heating pipe is mainly applied to occasions where high-temperature steam can be generated by devices such as coal-fired boilers in advance in thermal power plants, chemical plants and the like. For a photo-thermal power station and an energy storage power station, because the requirement on cleanliness of a heat conduction oil pipeline is high, the quality of the heat conduction oil can be influenced by the existence of impurities such as water, and the problems of drainage and water attack can occur by adopting high-temperature steam as a heating pipe medium, and rusting in the pipe can also be caused.

SUMMERY OF THE UTILITY MODEL

In view of the above fact, the utility model aims at adopting high temperature steam to can appear hydrophobic and water hammer problem as the warm braw warm-up medium among the prior art, also can arouse equipment or intraductal rust problem, and then designed a hot-air preheating and purge system, utilize the millet electricity, abandon the energy heated air that the light was abandoned to the wind and then preheat high temperature conduction oil working line or working equipment, prevent stress concentration and conduction oil oiling or salt injection salt in-process phenomenon of condensing, with the reduction system operation risk.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

hot-air preheating and purging system, include solid heat reservoir, hot-air pipeline, cold air pipeline, treat the preheating pipeline or treat preheating equipment, first valve, second valve, third valve and air-blower or compressor, the solid heat reservoir passes through the hot-air pipeline with the cold air pipeline with treat the preheating pipeline or treat that preheating equipment connects, first valve is installed on the hot-air pipeline, second valve and third valve are installed on the cold air pipeline, air-blower or compressor are installed on the cold air pipeline, and are located between second valve and the third valve.

Further, the hot air preheating and purging system further comprises a temperature sensor installed on the hot air duct.

Further, the temperature sensor is located between the outlet end of the solids heat reservoir and the first valve.

Further, the hot air preheating and purging system further comprises a flow sensor installed on the hot air duct.

Further, the flow sensor is located between the temperature sensor and the first valve.

Further, the hot air preheating and purging system further includes a first pressure sensor mounted on the hot air duct.

Further, the first pressure sensor is positioned between the first valve and the inlet end of the pipeline to be preheated or the equipment to be preheated.

Further, the hot air preheating and purging system further includes a second pressure sensor mounted on the cold air duct.

Further, the second pressure sensor is located between the third valve and the blower or compressor.

Further, the solid heat reservoir is a solid medium heat storage device.

Further, the pipeline to be preheated is an oil pipe, a salt pipe or a flowing water medium pipeline, and the equipment to be preheated is a heat exchanger, an evaporator, an evaporation pump or a steam turbine.

Further: the solid heat reservoir is replaced by a solar heat collection field and a heat collector, the solar heat collection field is used for collecting solar heat and heating air in a vacuum heat collection pipe of the heat collector to serve as a heat source. So set up, form required high temperature air in the heat collector, utilize high temperature air to heat pipeline or equipment.

The utility model discloses the effect that reaches does:

the utility model discloses a hot-air preheats and sweeps system, utilize solid heat reservoir heated air to carry out the heating pipe as the heating pipe medium to the heat conduction oil pipeline of conduction oil slot type light and heat power station, in light and heat power station and energy storage power station, the setting of heat-retaining system provides convenient condition for heated air, because solid energy storage cost is lower, the operating temperature range is wide and in utilizing millet electricity, abandon the advantage in the light energy aspect of wind abandoning, give priority to and combine solid energy storage equipment heated air as the heating pipe medium to carry out the heating pipe to the heat conduction medium pipeline of light and heat power station and energy storage power station, preheat equipment, the required time that pipeline or equipment heat conduction medium temperature reduces to below the freezing point has been prolonged effectively, compare in high temperature steam heating pipe, high temperature air heating pipe is more suitable for heating pipe or warm-up machine before light and heat storage power station pour into heat conduction medium, use high temperature air as the warm-up pipe medium and avoided hydrophobic and the appearance of water attack problem, the device and the tube can not be rusted, and the device and the tube have important significance in the aspects of safe injection of a heat-conducting medium, utilization of abandoned wind and abandoned light energy and expansion of the energy storage system of the photo-thermal power station. In addition, the hot air heating pipe technology based on solid energy storage has strong adaptability, not only can be used as a technology for preheating heat-conducting medium pipelines or equipment of a light thermal power station and an energy storage power station, but also can be used as other occasions with requirements on preheating pipelines or preheating equipment, and has important popularization and application values in the technical field of solar energy and other industrial fields. In addition, the solid energy storage hot air medium can also be other gases, including gases such as nitrogen, helium and the like.

Drawings

Fig. 1 is a schematic structural diagram of a hot air preheating and purging system (solid heat storage device) according to the present invention;

fig. 2 is a schematic structural view (heat collector) of the hot air preheating and purging system of the present invention.

Wherein:

1-a solid heat reservoir; 2-hot air pipes; 3-a cold air duct; 4-a pipeline or equipment to be preheated; 5-a first valve; 6-a second valve; 7-a third valve; 8-a temperature sensor; 9-a flow sensor; 10-a first pressure sensor; 11-a second pressure sensor; 12-blower or compressor.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In this application, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "disposed," "connected," and "secured" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail with reference to the accompanying fig. 1 in conjunction with an embodiment.

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Example 1: referring to fig. 1, the hot air preheating and purging system of the present embodiment includes a solid heat reservoir 1, a hot air pipe 2, a cold air pipe 3, a pipe to be preheated, a first valve 5, a second valve 6, a third valve 7, a blower or compressor 12, a flow sensor 9, a first pressure sensor 10, and a second pressure sensor 11, the solid heat reservoir 1 is connected with the pipeline to be preheated through the hot air pipeline 2 and the cold air pipeline 3, the temperature sensor 8, the flow sensor 9, the first valve 5 and the first pressure sensor 10 are sequentially installed on the hot air duct 2 according to the hot air flowing direction, the second valve 6, the blower or the compressor 12, the second pressure sensor 11 and the third valve 7 are sequentially installed on the cold air pipeline 3 according to the cold air flowing direction, and the solid heat reservoir 1 is a solid medium heat storage device. The common solid heat storage medium is magnesia brick. The magnesia brick has the characteristics of high specific heat capacity, high material density, wide working temperature range (0-700 ℃), low cost and the like, and is proved to be a good solid energy storage material in wide and long-term application. This embodiment utilizes millet electricity, abandons the advantage in the aspect of wind and abandons light energy, and the preferential consideration combines solid energy storage equipment heating air to carry out the heating pipe and sweep as the heating pipe and sweep the pipeline of medium optothermal power station or energy storage power station, and hot-air warp hot-air pipeline 2 follows solid heat reservoir 1 gets into wait to preheat the pipeline, heat and sweep wait to preheat behind the pipeline, the warp cold-air pipeline 3 returns solid heat reservoir 1, cold-air is in heat absorption intensification gets into next circulation in the solid heat reservoir 1.

Example 2: referring to fig. 1, the hot air preheating and purging system of the present embodiment includes a solid heat reservoir 1, a hot air pipe 2, a cold air pipe 3, a device to be preheated, a first valve 5, a second valve 6, a third valve 7, a blower or compressor 12, a flow sensor 9, a first pressure sensor 10, and a second pressure sensor 11, the solid heat reservoir 1 is connected with the equipment to be preheated through the hot air pipeline 2 and the cold air pipeline 3, the temperature sensor 8, the flow sensor 9, the first valve 5 and the first pressure sensor 10 are sequentially installed on the hot air duct 2 according to the hot air flowing direction, the second valve 6, the blower or the compressor 12, the second pressure sensor 11 and the third valve 7 are sequentially installed on the cold air pipeline 3 according to the cold air flowing direction, and the solid heat reservoir 1 is a solid medium heat storage device. The common solid heat storage medium is magnesia brick. The magnesia brick has the characteristics of high specific heat capacity, high material density, wide working temperature range (0-700 ℃), low cost and the like, and is proved to be a good solid energy storage material in wide and long-term application. This embodiment utilizes millet electricity, abandons the advantage in the aspect of the wind energy of abandoning, and the priority combines solid energy storage equipment heating air to carry out the warm-up and sweep as warm-up and sweep the equipment of medium optothermal power station or energy storage power station, and hot-air warp hot-air pipeline 2 follows solid heat reservoir 1 gets into wait to preheat equipment, heat and sweep wait to preheat equipment after, the warp cold-air pipeline 3 returns solid heat reservoir 1, cold-air is in heat absorption intensification gets into next circulation in the solid heat reservoir 1.

Example 3: referring to fig. 2, the hot air preheating and purging system of the embodiment includes a heat collector, a heat collecting field, a hot air pipe 2, a cold air pipe 3, a pipe to be preheated, a first valve 5, a second valve 6, a third valve 7, a blower or compressor 12, a flow sensor 9, a first pressure sensor 10, and a second pressure sensor 11, the heat collecting field is used to collect solar heat and heat air in the heat collector, the heat collector is connected to the pipe to be preheated through the hot air pipe 2 and the cold air pipe 3, the temperature sensor 8, the flow sensor 9, the first valve 5, and the first pressure sensor 10 are sequentially installed on the hot air pipe 2 according to a hot air flowing direction, the second valve 6, the blower or compressor 12, the second pressure sensor 11, and the third valve 7 are sequentially installed on the cold air pipe 3 according to a cold air flowing direction, required high-temperature air is formed in the heat collector, and the high-temperature air is used for heating and blowing the pipeline. In the embodiment, the advantages of valley electricity, abandoned wind and abandoned light energy are utilized, the combination of a heat collection field and a heat collector for heating air to serve as a heating pipe and a blowing medium for heating and blowing the pipe of the thermoelectric power station or the energy storage power station is preferably considered, hot air enters the pipe to be preheated from the heat collector through the hot air pipeline 2, after the pipe to be preheated is heated and blown, the hot air returns to the heat collector through the cold air pipeline 3, and cold air absorbs heat in the heat collector and is heated to enter the next circulation. Before the solar thermal collector of the photo-thermal power station is injected with the heat exchange medium, the heated air can be used as a heat source in project construction and debugging stages, for example, the heated air can be used for preheating and blowing a pipeline

Example 4: referring to fig. 2, the hot air preheating and purging system of the embodiment includes a heat collector, a heat collecting field, a hot air pipe 2, a cold air pipe 3, a pipe to be preheated, a first valve 5, a second valve 6, a third valve 7, a blower or compressor 12, a flow sensor 9, a first pressure sensor 10, and a second pressure sensor 11, the heat collecting field is used to collect solar heat and heat air in the heat collector, the heat collector is connected to the equipment to be preheated through the hot air pipe 2 and the cold air pipe 3, the temperature sensor 8, the flow sensor 9, the first valve 5, and the first pressure sensor 10 are sequentially installed on the hot air pipe 2 according to a hot air flowing direction, the second valve 6, the blower or compressor 12, the second pressure sensor 11, and the third valve 7 are sequentially installed on the cold air pipe 3 according to a cold air flowing direction, required high-temperature air is formed in the heat collector, and the high-temperature air is used for heating and blowing the equipment. In the embodiment, the advantages of valley electricity, abandoned wind and abandoned light energy are utilized, the heat collection field and the heat collector are preferably combined to heat air as a warming and purging medium to warm and purge the equipment of the thermoelectric power station or the energy storage power station, the hot air enters the equipment to be preheated from the heat collector through the hot air pipeline 2, the hot air returns to the heat collector through the cold air pipeline 3 after heating and purging the equipment to be preheated, and the cold air absorbs heat in the heat collector and is heated to enter the next circulation. Before the solar thermal collector of the photothermal power station is injected into the heat exchange medium, the heated air can be used as a heat source in project construction and debugging stages, and for example, the heated air can be used for preheating and purging pipelines.

The above embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (10)

1. The hot air preheating and purging system is characterized in that: including solid heat reservoir (1), hot-air line (2), cold-air line (3), treat the preheating pipe way or treat preheating device (4), first valve (5), second valve (6), third valve (7) and air-blower or compressor (12), solid heat reservoir (1) passes through hot-air line (2) with cold-air line (3) with treat the preheating pipe way or treat the preheating device and connect, install first valve (5) on hot-air line (2), install second valve (6) and third valve (7) on cold-air line (3), air-blower or compressor (12) are installed on cold-air line (3), and are located between second valve (6) and third valve (7).

2. The hot air preheating and purging system according to claim 1, wherein: the hot air pipeline system further comprises a temperature sensor (8), wherein the temperature sensor (8) is installed on the hot air pipeline (2).

3. The hot air preheating and purging system according to claim 2, wherein: the temperature sensor (8) is positioned between the outlet end of the solid heat reservoir (1) and the first valve (5).

4. The hot air preheat and purge system of claim 3, wherein: the hot air pipeline system further comprises a flow sensor (9), wherein the flow sensor (9) is installed on the hot air pipeline (2).

5. The hot air preheating and purging system according to claim 4, wherein: the flow sensor (9) is located between the temperature sensor (8) and the first valve (5).

6. The hot air preheating and purging system according to claim 5, wherein: the device is characterized by further comprising a first pressure sensor (10), wherein the first pressure sensor (10) is installed on the hot air pipeline (2), and the first pressure sensor (10) is located between the first valve (5) and the inlet end of the pipeline to be preheated or the equipment (4) to be preheated.

7. The hot air preheating and purging system according to claim 6, wherein: the cold air pipeline is characterized by further comprising a second pressure sensor (11), wherein the second pressure sensor (11) is installed on the cold air pipeline (3), and the second pressure sensor (11) is located between a third valve (7) and a blower or a compressor (12).

8. The hot air preheating and purging system according to any one of claims 1 to 7, wherein: the solid heat reservoir (1) is a solid medium heat storage device.

9. The hot air preheating and purging system according to claim 8, wherein: the pipeline to be preheated is an oil pipe, a salt pipe or a flowing water medium pipeline, and the equipment to be preheated is a heat exchanger, an evaporator, an evaporation pump or a steam turbine.

10. The hot air preheating and purging system according to any one of claims 1 to 7, wherein: the solid heat reservoir (1) is replaced by a solar heat collection field and a heat collector, wherein the solar heat collection field is used for collecting solar heat and heating air in a vacuum heat collection pipe of the heat collector to serve as a heat source.

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