Heat and gas supply device

Abstract

The utility model provides a heat supply and air supply device which is used for the technical field of energy storage and comprises an air storage which is divided into a working medium storage cavity and an air storage cavity, the pressure in the working medium storage cavity and the pressure in the air storage cavity are equal and are constant, and the sum of the volume of the working medium storage cavity and the volume of the air storage cavity is constant. The air storage cavity is connected to air utilization equipment; the compressed air energy storage equipment is used for providing compressed air for the air storage cavity and storing heat; the heat pump loop can convert the gaseous working medium output from the working medium storage cavity into a gas phase and a liquid phase and convey the gas phase and the liquid phase back to the working medium storage cavity; and the gasification loop can gasify the liquid working medium in the working medium storage cavity and convey the liquid working medium back to the working medium storage cavity. According to the heat supply and air supply device, the compressed air energy storage equipment is used for providing compressed air and heating and storing energy in the night off-peak electricity period, the compressed air in the air storage can be used in the daytime, the heat pump loop and the gasification loop are matched to achieve the volume change of the air storage cavity in the air storage, and therefore high-energy-efficiency air production and heat production are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage, in particular to a heat and gas supply device. BACKGROUND

[0002] In industrial production processes, a large amount of low-temperature heat energy is often needed, and the ways to obtain heat energy include external centralized heat supply and self-built boilers by enterprises. For higher-temperature heat energy, it is more economical to produce by natural gas or electric boilers. For hot water with a lower temperature, the energy-saving effect and economy are better by using a heat pump. At the same time, a large amount of compressed air is usually needed in industrial production processes, and the compression process of air produces compression heat, which can also be used as heat energy needed for industrial production. Heat energy and compressed air can be stored by appropriate means to save electricity costs by taking advantage of peak and valley electricity prices. However, if the heat pump device, compressed air device, and heat and gas storage facilities are built separately, the initial investment is high, and energy waste occurs, resulting in less than ideal benefits. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the present application provides a heat and gas supply device, which uses a compressed air storage device to provide compressed air and store heat energy at night during the valley electricity period, and uses the compressed air in the air storage library and a heat pump circuit and a gasification circuit to cooperate to realize the volume change of the air storage cavity in the air storage library during the day, so as to achieve high energy efficiency of gas production and heat production.

[0004] In order to achieve the above purpose, the present application provides the following technical solutions:

[0005] A heat and gas supply device, comprising:

[0006] An air storage library, which is a pressure vessel and is divided into a working medium storage cavity and an air storage cavity which are independent of each other, the pressure in the working medium storage cavity is equal to the pressure in the air storage cavity and is constant, the sum of the volume of the working medium storage cavity and the volume of the air storage cavity is constant, and the air storage cavity is connected to a gas-using device;

[0007] A compressed air storage device, which can compress and deliver air to the air storage cavity, and collect and provide heat generated during air compression to a heat-using device;

[0008] A heat pump circuit, which can compress and liquefy gaseous working medium output from the working medium storage cavity when the air storage cavity expands and the working medium storage cavity contracts, and convert the liquid working medium into gas-liquid two-phase and deliver it back to the working medium storage cavity;

[0009] A gasification circuit, liquid working medium in the working medium storage cavity can be output to the gasification circuit, and the liquid working medium can be gasified by the gasification circuit and delivered back to the working medium storage cavity.

[0010] Optionally, the compressed air storage device comprises an air compressor and a heat storage heat exchanger, compressed air output by the air compressor is delivered to the air storage chamber after passing through the heat storage heat exchanger, and the heat storage heat exchanger absorbs heat generated in the process of air compression and supplies the heat to the heat utilization device.

[0011] Optionally, the compressed air storage device comprises a first air compressor, a first heat storage heat exchanger, a second air compressor and a second heat storage heat exchanger connected in sequence.

[0012] Optionally, the heat storage heat exchanger can transfer heat to a heat storage water tank, and supply heat to the heat utilization device through the heat storage water tank.

[0013] Optionally, the heat pump circuit comprises a gas liquefaction device and a gas-liquid two-phase conversion device, and gaseous working medium in the working medium storage chamber is sequentially liquefied by the gas liquefaction device, converted into gas-liquid two-phase by the gas-liquid two-phase conversion device, and then delivered back to the working medium storage chamber.

[0014] Optionally, the gas liquefaction device comprises a heat pump compressor and a heat pump heat storage heat exchanger, gaseous working medium is liquefied after being compressed by the heat pump compressor and exchanging heat with the heat pump heat storage heat exchanger, and the heat pump heat storage heat exchanger can store heat released by liquefaction of gaseous working medium in a heat storage water tank and supply heat to the heat utilization device through the heat storage water tank.

[0015] Optionally, the gas-liquid two-phase conversion device is a liquid expander.

[0016] Optionally, the gas-liquid two-phase conversion device further comprises a throttle valve arranged downstream of the liquid expander.

[0017] Optionally, the gasification circuit comprises a circulating pump and a gasifier, and liquid working medium in the working medium storage chamber can be delivered to the gasifier by the circulating pump, gasified in the gasifier, and then delivered back to the working medium storage chamber.

[0018] Optionally, an inlet of the circulating pump is connected to a bottom of the working medium storage chamber.

[0019] The heating and gas supply device provided in the application is used in cooperation with the compressed air storage device, the heat pump circuit and the gasification circuit, compressed air is provided by the compressed air storage device during the night valley power period to produce heat storage, gaseous working medium is first liquefied by the heat pump circuit, and then gas-liquid two-phase is used to appropriately reduce the total volume of working medium, i.e., to reduce the volume of the working medium storage chamber to release space for the air storage chamber; when the gas utilization device needs to use compressed air in the air storage chamber, part of the liquid working medium is gasified by the gasification circuit to increase the total volume of working medium, i.e., to increase the volume of the working medium storage chamber to supplement the compressed air used, so as to save electricity and improve energy utilization. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only constitute a part of the embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of the provided drawings.

[0021] Figure 1 The schematic diagram of the heat and gas supply device provided by the present application.

[0022] In Figure 1 which:

[0023] 1, gas storage device; 11, first air compressor; 12, first heat storage heat exchanger; 13, second air compressor; 14, second heat storage heat exchanger; 15, heat storage water tank;

[0024] 2, heat pump circuit; 21, heat pump compressor; 22, third heat storage heat exchanger; 23, liquid expander; 24, throttle valve; 25, circulating pump; 26, gasifier;

[0025] 3, gas storage; 31, working medium storage cavity; 32, air storage cavity; 33, flexible diaphragm;

[0026] 4, heat using equipment; 5, gas using equipment. DETAILED DESCRIPTION

[0027] The present application provides a heat and gas supply device, which provides compressed air and heat storage energy by using gas storage device at night during valley electricity period, and can use compressed air in gas storage during the day, and use heat pump circuit and gasification circuit to cooperate to realize the volume change of air storage cavity in gas storage, so as to achieve high energy efficiency of gas production and heat production.

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0029] As Figure 1 shown, the heat and gas supply device provided by the present application includes gas storage 3, gas storage device 1, heat pump circuit 2 and gasification circuit, wherein:

[0030] An air reservoir 3, which is a pressure container separated into a working medium storage cavity 31 and an air storage cavity 32, the pressure in the working medium storage cavity 31 and the pressure in the air storage cavity 32 are equal and constant, the sum of the volume of the working medium storage cavity 31 and the volume of the air storage cavity 32 is constant; the separation of the working medium storage cavity 31 and the air storage cavity 32 can be realized by a flexible diaphragm 33, specifically, the flexible diaphragm 33 can be used in the pressure container to enclose the air storage cavity 32, and the space between the inner surface of the pressure container and the outer surface of the flexible diaphragm 33 is used as the working medium storage cavity 31, or vice versa; or, a slidable piston is arranged between the pressure containers to separate the working medium storage cavity 31 and the air storage cavity 32; wherein the air storage cavity 32 is connected to the air using equipment 5 and can provide compressed air for the air using equipment 5 at any time.

[0031] A compressed air storage device 1, which can compress air with atmospheric air as raw material and deliver it to the air storage cavity 32, and collect and provide the heat generated in the air compression process to the heat using equipment 4.

[0032] When in the valley electricity period such as night, the compressed air production and delivery to the air storage cavity 32 can be realized by the compressed air storage device 1, at this time, the air storage cavity 32 expands and the working medium storage cavity 31 shrinks, and the heat pump circuit 2 can compress and liquefy the gaseous working medium output from the working medium storage cavity 31 when the air storage cavity 32 expands and the working medium storage cavity 31 shrinks, and convert the liquid working medium into gas-liquid two-phase and deliver it back to the working medium storage cavity 31, so as not to reduce the total volume of the working medium too fast, to achieve the purpose of appropriately reducing the volume of the working medium storage cavity 31, to make room for the increased volume of the air storage cavity 32.

[0033] When the air using equipment 5 needs to use compressed air, the compressed air in the air storage cavity 32 is consumed, at this time, the liquid working medium in the working medium storage cavity 31 can be output to the gasification circuit, the liquid working medium is gasified by the gasification circuit and delivered back to the working medium storage cavity 31, so as to increase the volume of the working medium storage cavity 31 to fill the part of the volume of the air storage cavity 32 that is reduced.

[0034] The heating and air supply device of the present application, through the cooperation of the compressed air storage device 1, the heat pump circuit 2 and the gasification circuit, can provide compressed air and produce heat energy storage during the valley electricity period at night by using the compressed air storage device 1, and then use the heat pump circuit 2 to first liquefy the gaseous working medium, and then use the gas-liquid two-phase to appropriately reduce the total volume of the working medium, i.e. to reduce the volume of the working medium storage cavity 31 to release space for the air storage cavity 32; when the air using equipment 5 needs to use the compressed air in the air storage cavity 32, then use the gasification circuit to gasify part of the liquid working medium to increase the total volume of the working medium, i.e. to increase the volume of the working medium storage cavity 31 to supplement the compressed air used, so as to achieve the purpose of saving electricity and improving energy utilization.

[0035] In a preferred embodiment, the compressed air energy storage device 1 comprises an air compressor and a heat storage heat exchanger, compressed air output by the air compressor is delivered to the air storage chamber 32 after passing through the heat storage heat exchanger, and the heat storage heat exchanger absorbs heat generated during air compression and supplies the heat to the heat utilization device 4.

[0036] The air compressor provides compressed air for the air storage chamber 32 of the air storage 3, and the heat generated during the compression process can be supplied to the heat utilization device 4 through the heat storage heat exchanger, thereby improving energy utilization.

[0037] In a preferred embodiment, as shown in Figure 1 , the compressed air energy storage device 1 comprises a first air compressor 11, a first heat storage heat exchanger 12, a second air compressor 13, and a second heat storage heat exchanger 14 connected in sequence.

[0038] The working efficiency of compressed air can be improved by connecting multiple air compressors in series, and a heat storage heat exchanger is also arranged downstream of each compressor to collect heat; specifically, the air outlet of the first air compressor 11 is connected to the air inlet of the first heat storage heat exchanger 12, the air outlet of the first heat storage heat exchanger 12 is connected to the air inlet of the second air compressor 13, the air outlet of the second air compressor 13 is connected to the air inlet of the second heat storage heat exchanger 14, and the air outlet of the second heat storage heat exchanger 14 is connected to the air storage chamber 32.

[0039] In a preferred embodiment, as shown in Figure 1 , the heat storage heat exchanger can transfer heat to the heat storage water tank 15 and supply heat to the heat utilization device 4 through the heat storage water tank 15.

[0040] The heat utilization device 4 does not need heat supply at all times, so heat can be stored in the form of hot water in the heat storage water tank 15, and when needed, it can be supplied to the heat utilization device 4 through the heat storage water tank 15, which is not easy to waste.

[0041] In a preferred embodiment, the heat pump circuit 2 comprises a gas liquefaction device and a gas-liquid two-phase conversion device, and the gaseous working medium in the working medium storage chamber 31 is sequentially liquefied by the gas liquefaction device and converted into gas-liquid two-phase by the gas-liquid two-phase conversion device, and then delivered back to the working medium storage chamber 31.

[0042] The gaseous working medium is first liquefied by the gas liquefaction device, and then the liquid working medium is converted into gas-liquid two-phase by the gas-liquid two-phase conversion device, which can appropriately reduce the total volume of the working medium, thereby offsetting the part of the volume of the working medium storage chamber 31 that is reduced when the air storage chamber 32 is enlarged, and further making space in the air storage chamber 32 to accommodate the part of the compressed air produced by the compressed air energy storage device 1 during the valley electricity period and input into the air storage chamber 32.

[0043] In a preferred embodiment, as shown in Figure 1As shown, the gas liquefaction equipment includes a heat pump compressor 21 and a heat pump heat storage exchanger (i.e., the third heat storage exchanger 22). The gaseous working fluid is compressed by the heat pump compressor 21 and liquefied after exchanging heat with the heat pump heat storage exchanger. The heat pump heat storage exchanger can store the heat released by the liquefaction of the gaseous working fluid in the hot water storage tank 15 and supply heat to the heat-using equipment 4 through the hot water storage tank 15.

[0044] The gas liquefaction device can compress and liquefy the gaseous working fluid, thereby reducing the volume of the working fluid storage chamber 31. The heat generated during the compression process is stored in the hot water storage tank 15 through the heat pump heat storage exchanger so that it can be supplied to the heat-using equipment 4 when needed.

[0045] Specifically, such as Figure 1 As shown, a main water supply pipeline can be divided into three branches to provide cold water to the first heat storage heat exchanger 12, the second heat storage heat exchanger 14 in the compressed air energy storage device 1, and the heat pump heat storage heat exchanger (i.e., the third heat storage heat exchanger 22) in the heat pump circuit 2. The heated water is then collected and stored in the hot water storage tank 15 to achieve heat storage.

[0046] In a preferred embodiment, such as Figure 1 As shown, the gas-liquid two-phase conversion device is a liquid expander 23.

[0047] The liquid expander 23 can vaporize a portion of the liquid working fluid, thereby turning the liquid working fluid into a two-phase gas-liquid mixture, thus achieving the purpose of adjusting the volume of the working fluid storage chamber 31.

[0048] In a preferred embodiment, such as Figure 1 As shown, the gas-liquid two-phase conversion device also includes a throttle valve 24 located downstream of the liquid expander 23.

[0049] By connecting the throttle valve 24 in series with the liquid expander 23, the liquid working fluid can be further vaporized, increasing the proportion of gas in the gas-liquid mixture and improving the vaporization efficiency.

[0050] Specifically, such as Figure 1 As shown, a gas outlet is provided on the working fluid storage chamber 31. The gas outlet is connected to the air inlet of the heat pump compressor 21. The air outlet of the heat pump compressor 21 is connected to the working fluid inlet of the third heat storage heat exchanger 22. The working fluid outlet of the third heat storage heat exchanger 22 is connected to the inlet of the liquid expander 23. The outlet of the liquid expander 23 is connected to the inlet of the throttle valve 24. The outlet of the throttle valve 24 is connected to the first gas inlet of the working fluid storage chamber 31.

[0051] In a preferred embodiment, such as Figure 1 As shown, the vaporization circuit includes a circulation pump 25 and a vaporizer 26. The liquid working fluid in the working fluid storage chamber 31 can be transported by the circulation pump 25 to the vaporizer 26 for vaporization and then transported back to the working fluid storage chamber 31.

[0052] In this way, the gasification circuit can be powered by the circulation pump 25, which delivers the liquid working medium to the gasifier 26 to be gasified, and then delivers the gaseous working medium back to the working medium storage chamber 31.

[0053] Specifically, as shown in Figure 1 the working medium storage chamber 31 is provided with a liquid outlet, the inlet of the circulation pump 25 is connected to the liquid outlet, the outlet of the circulation pump 25 is connected to the inlet of the gasifier 26, and the outlet of the gasifier 26 is connected to the second gas inlet of the working medium storage chamber 31 (the second gas inlet and the gas outlet of the working medium storage chamber 31 can be the same).

[0054] In a preferred embodiment, the inlet of the circulation pump 25 is connected to the bottom of the working medium storage chamber 31.

[0055] Since the gasification circuit is to gasify the liquid working medium, and the liquid working medium will gather at the bottom of the working medium storage chamber 31 due to gravity, connecting the inlet of the circulation pump 25 to the bottom of the working medium storage chamber 31 can facilitate the liquid working medium to flow out to the circulation pump 25 by gravity.

[0056] Specifically, in the case of using a flexible diaphragm 33 to enclose the air storage chamber 32 in the pressure vessel, and using the space between the inner surface of the pressure vessel and the outer surface of the flexible diaphragm 33 as the working medium storage chamber 31, a liquid outlet can be formed at the bottom of the pressure vessel, and the inlet of the circulation pump 25 can be connected to the liquid outlet.

[0057] In a preferred embodiment, a control system and pressure sensors arranged in the air storage chamber 32 and the working medium storage chamber 31, respectively, are further included, and the control system determines and controls the start and stop of the heat pump circuit 2 and / or the gasification circuit according to the pressure signals in the air storage chamber 32 and the working medium storage chamber 31.

[0058] The basic principles of the present application are described above in conjunction with specific embodiments, but it should be noted that the advantages, advantages, effects, etc. mentioned in the present application are only examples and not limitations, and these advantages, advantages, effects, etc. cannot be considered as the must-have of each embodiment of the present application. In addition, the above specific details are only for the purpose of example and understanding, and are not limited to the above specific details. The above details do not limit the present application to the above specific details.

[0059] The block diagrams of the devices, apparatuses, equipment, systems involved in the present application are only illustrative examples and are not intended to require or imply that the connection, arrangement, configuration must be as shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, equipment, systems can be connected, arranged, configured in any manner. Words such as "include", "contain", "have", and the like are open-ended words, mean "including but not limited to", and can be used interchangeably. The words "or" and "and" used herein mean the word "or", and can be used interchangeably, unless the context clearly indicates otherwise. The word "such as" used herein means the phrase "such as but not limited to", and can be used interchangeably.

[0060] It should also be noted that in the devices, apparatuses and methods of the present application, each component or step can be decomposed or recombined. These decompositions or recombinations should be considered as equivalent solutions of the present application.

[0061] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other aspects without departing from the scope of the present application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0062] It should be understood that the adjectives "first", "second", "third", "fourth", "fifth" and "sixth" used in the embodiments of the present application are only used for clearer description of the technical solutions and cannot be used to limit the protection scope of the present application.

[0063] The above description has been given for the purpose of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, one skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

[0064] The above describes the basic principles of the present application in combination with specific embodiments, but it should be noted that the advantages, benefits, effects mentioned in the present application are only examples and not limitations, and these advantages, benefits, effects cannot be considered as necessary for each embodiment of the present application. In addition, the above specific details are only for the purpose of illustration and understanding, and the above details do not limit the present application to the specific details described above.

[0065] The block diagrams of the devices, apparatuses, equipment, systems involved in the present application are only illustrative examples and are not intended to require or imply that the connection, arrangement, configuration must be as shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, equipment, systems can be connected, arranged, configured in any manner. Words such as "include", "contain", "have", and the like are open-ended words, mean "including but not limited to", and can be used interchangeably. The words "or" and "and" used herein mean the word "or", and can be used interchangeably, unless the context clearly indicates otherwise. The word "such as" used herein means the phrase "such as but not limited to", and can be used interchangeably.

[0066] It should also be noted that in the devices, apparatuses and methods of the present application, each component or each step can be decomposed or recombined. These decompositions or recombinations should be considered as equivalent solutions of the present application.

[0067] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other aspects without departing from the scope of the present application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0068] It should be understood that the adjectives "first", "second", "third", "fourth", "fifth" and "sixth" used in the embodiments of the present application are only used for more clearly describing the technical solutions, and cannot be used to limit the protection scope of the present application.

[0069] The above description has been given for the purpose of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A heat and gas supply device, characterized in that The application relates to a gas storage device, comprising: a gas storage, which is a pressure container and is divided into a working medium storage chamber and an air storage chamber, the pressure in the working medium storage chamber is equal to the pressure in the air storage chamber, the pressure is constant, the sum of the volume of the working medium storage chamber and the volume of the air storage chamber is constant, and the air storage chamber is connected to a gas-using device; a gas compression and storage device, which can compress and deliver air to the air storage chamber, and collect and provide heat generated in the air compression process to a heat-using device; a heat pump circuit, which can compress and liquefy gaseous working medium output from the working medium storage chamber when the working medium storage chamber is contracted, and convert the liquid working medium into gas-liquid two-phase and deliver it back to the working medium storage chamber when the air storage chamber is expanded; a gasification circuit, in which liquid working medium in the working medium storage chamber can be output, and the liquid working medium can be gasified by the gasification circuit and delivered back to the working medium storage chamber.

2. The heat and gas supply device according to claim 1, characterized in that The gas compression and storage device comprises an air compressor and a heat storage heat exchanger, compressed air output by the air compressor is delivered to the air storage chamber after passing through the heat storage heat exchanger, and the heat storage heat exchanger absorbs heat generated in the air compression process and supplies the heat to the heat-using device.

3. The heat and gas supply device according to claim 2, characterized in that The gas compression and storage device comprises a first air compressor, a first heat storage heat exchanger, a second air compressor and a second heat storage heat exchanger connected in sequence.

4. The heat and gas supply device according to claim 2, characterized in that The heat storage heat exchanger can transfer heat to a heat storage water tank, and supply heat to the heat-using device through the heat storage water tank.

5. The heat and gas supply device according to claim 1, characterized in that The heat pump circuit comprises a gas liquefaction device and a gas-liquid two-phase conversion device, gaseous working medium in the working medium storage chamber is liquefied by the gas liquefaction device and converted into gas-liquid two-phase by the gas-liquid two-phase conversion device in sequence, and then is delivered back to the working medium storage chamber.

6. The heat and gas supply device according to claim 5, characterized in that The gas liquefaction device comprises a heat pump compressor and a heat pump heat storage heat exchanger, gaseous working medium is compressed by the heat pump compressor and is liquefied after heat exchange with the heat pump heat storage heat exchanger, the heat pump heat storage heat exchanger can store heat released by the liquefaction of gaseous working medium in a heat storage water tank, and supply heat to the heat-using device through the heat storage water tank.

7. The heat and gas supply device according to claim 5, characterized in that The gas-liquid two-phase conversion device is a liquid expander.

8. The heat and gas supply device according to claim 7, characterized in that The gas-liquid two-phase conversion device further comprises a throttle valve arranged downstream of the liquid expander.

9. The heat and gas supply device according to claim 1, characterized in that The gasification circuit comprises a circulating pump and a gasifier, liquid working medium in the working medium storage chamber can be delivered by the circulating pump to the gasifier for gasification and then delivered back to the working medium storage chamber.

10. The heat and gas supply device according to claim 9, characterized in that The inlet of the circulating pump is connected to the bottom of the working medium storage chamber.

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