Energy-saving system for continuously boiling by adding solar energy into boiler in brewery

Abstract

The invention provides an energy-saving system for continuously boiling by adding solar energy into a brewery boiler. According to the scheme, the energy-saving system comprises the boiler, a solar heating device, a storage tank, a first heat exchanger, a second heat exchanger, a third heat exchanger, a fourth heat exchanger and temperature values among the devices. The storage tank can store heat of solar energy and energy of waste heat generated after boiling of the boiling device, and can provide heat supplement for continuous boiling of the boiling device in reverse. Solar heat energy is used for supplementing heat for the wort boiling system and recycling and storing secondary steam energy of the boiler, so that the heat energy utilization rate can be increased, heat circulation and reutilization of the system can be realized, the steam consumption of an external pipe network can be saved, the consumption of raw coal combustion is reduced, the steam loss is reduced, and the energy-saving effect is achieved; and moreover, the wort heating time is shortened, so that the wort boiling time of the boiling device is shortened, and the production efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of food machinery engineering, and in particular to an energy-saving system for adding solar energy to a brewery's boiling vessel to continue boiling. Background Technology

[0002] With economic and social development, human demand for energy is increasing, and dependence on it is also growing. However, the reserves of traditional energy sources such as coal, oil, and natural gas are irreversibly decreasing, making energy crises and energy security the most pressing global concerns. Against this backdrop, developing and utilizing renewable energy, improving scientific and technological levels, and promoting industrial development have become important measures for countries to implement sustainable energy strategies.

[0003] Currently, breweries remain a special industry that consumes a large amount of resources, generates a lot of waste, and is highly energy-intensive. Moreover, the energy consumption of traditional breweries in China is 30% to 40% higher than the international advanced level. Therefore, China's beer industry needs to adopt a "circular economy" model for innovation and research and development, update brewing equipment and processes, and embrace the "low-carbon era." This model should be based on the principles of "reduction, reuse, and recycling," characterized by low consumption, low emissions, and high efficiency, and should conform to the concept of sustainable development. This will contribute to the protection of the motherland's green mountains and clear waters and make efforts to control the impact of smog on the human respiratory system.

[0004] Traditional atmospheric pressure boiling systems in beer brewing suffer from significant energy waste. The high boiling intensity of traditional processes results in substantial heat consumption, with large amounts of hot steam being directly released from the chimney into the outside air during production, causing environmental and thermal pollution. This increases both material and energy consumption in the brewery's production process. Summary of the Invention

[0005] To address the aforementioned problems, this application provides an energy-saving system for adding solar energy to a brewery's boiling vessel to continue boiling.

[0006] According to one aspect of the embodiments of this application, an energy-saving system for adding solar energy to a brewery boiler for continued boiling is disclosed. The energy-saving system includes: a boiler for boiling wort and generating steam; a storage tank having a high-temperature zone for storing high-temperature stored water and a low-temperature zone for storing low-temperature stored water; the temperature of the low-temperature stored water is lower than the temperature of the high-temperature stored water; a solar heating device including a solar collector configured to absorb solar energy and heat an internal heat-collecting medium; and a first heat exchanger having a first hot-side channel and a first cold-side channel for heat exchange, the first hot-side channel for introducing the heated heat-collecting medium, and the first cold-side channel for introducing the stored heat medium, wherein the first heat exchanger can initially heat the stored heat medium. The second heat exchanger has a second hot-side channel and a second cold-side channel for heat exchange. The second hot-side channel is used to introduce steam generated by the boiler or condensate from the steam generated by the boiler. The medium inlet of the second cold-side channel is connected to the medium outlet of the first cold-side channel, and the medium outlet of the second cold-side channel is connected to the low-temperature zone. The second heat exchanger can reheat the heat storage medium after the initial heat exchange to form the low-temperature energy storage water and store it in the low-temperature zone. The low-temperature energy storage water in the low-temperature zone can absorb heat from the steam generated by the boiler to form high-temperature energy storage water and then store it in the high-temperature zone. The high-temperature energy storage water in the high-temperature zone can provide heat for the boiler to continue boiling the wort, thereby forming the low-temperature energy storage water and then storing it in the low-temperature zone.

[0007] In an exemplary embodiment, the energy-saving system for adding solar energy to the brewery boiler for continued boiling further includes: a medium inlet pipe having an inlet end and two outlet ends that are interconnected. The inlet end is used to introduce a medium. A first control valve is provided on the medium inlet pipe at a position corresponding to the two outlet ends. The two first control valves are used to control the on / off state of the two outlet ends respectively. One outlet end is connected to the medium inlet of the first cold side channel, and the other outlet end is connected to the medium inlet of the solar collector.

[0008] In one exemplary embodiment, the energy-saving system for adding solar energy to the brewery boiler for continued boiling further includes: a third heat exchanger having a third hot-side channel and a third cold-side channel for heat exchange; the boiler having a steam outlet for discharging the steam; the third hot-side channel communicating with the steam outlet for introducing the steam; the medium inlet of the third cold-side channel communicating with the low-temperature zone; and the medium outlet of the third cold-side channel communicating with the high-temperature zone; wherein: the steam passes through the third heat exchanger to heat the low-temperature energy storage water, and the heated low-temperature energy storage water forms the high-temperature energy storage water and is stored in the high-temperature zone.

[0009] In one exemplary embodiment, the medium outlet of the third hot-side channel is connected to the medium inlet of the second hot-side channel, so that the steam after heat exchange in the third heat exchanger forms condensate of the steam and is introduced into the second hot-side channel; the third heat exchanger is provided with a waste discharge pipe, one axial end of the waste discharge pipe is connected to the third hot-side channel, the waste discharge pipe is provided with a shut-off valve, and the other axial end of the waste discharge pipe is connected to a chimney.

[0010] In one exemplary embodiment, the energy-saving system for adding solar energy to the brewery boiler for continued boiling further includes: a fourth heat exchanger having a fourth hot-side channel and a fourth cold-side channel for heat exchange; the medium inlet of the fourth hot-side channel is connected to the high-temperature zone, the medium outlet of the fourth hot-side channel is connected to the low-temperature zone, the medium inlet of the fourth cold-side channel is used to introduce wort, and the medium outlet of the fourth cold-side channel is connected to the interior of the boiler; wherein: the high-temperature stored water passes through the fourth heat exchanger to heat the wort, the heated wort enters the boiler for boiling, and the heat-exchanged high-temperature stored water forms the low-temperature stored water and is stored in the low-temperature zone.

[0011] In one exemplary embodiment, the energy-saving system for adding solar energy to the brewery boiler for continued boiling further includes: a first low-temperature storage pipe connected between the medium outlet of the second cold-side channel and the low-temperature zone, and provided with a second control valve for controlling its on / off state; a second low-temperature storage pipe connected between the medium outlet of the fourth hot-side channel and the low-temperature zone, and provided with a third control valve for controlling its on / off state; and a low-temperature drain pipe connected between the low-temperature zone and the medium inlet of the third cold-side channel, and provided with a fourth control valve for controlling its on / off state.

[0012] In an exemplary embodiment, the energy-saving system for adding solar energy to the brewery boiler for continued boiling further includes: a high-temperature liquid storage pipe connected between the medium outlet of the third cold-side channel and the high-temperature zone, and equipped with a fifth control valve for controlling its on / off state; a high-temperature liquid discharge pipe connected between the high-temperature zone and the medium inlet of the fourth hot-side channel, and equipped with a sixth control valve for controlling its on / off state; the outlet of the high-temperature liquid storage pipe is connected to the inlet of the high-temperature liquid discharge pipe.

[0013] In one exemplary embodiment, the storage tank includes a tank body, a high-temperature water pipe, and a low-temperature water pipe; the tank body extends vertically, and the internal space of the tank body includes a high-temperature zone at the top and a low-temperature zone at the bottom, the high-temperature zone and the low-temperature zone being interconnected; the high-temperature water pipe is connected to the top of the high-temperature zone for introducing or discharging the high-temperature energy storage water; the low-temperature water pipe is connected to the bottom of the low-temperature zone for introducing or discharging the low-temperature energy storage water; the temperature of the low-temperature energy storage water is 78℃-80℃, and the temperature of the high-temperature energy storage water is 96℃-98℃.

[0014] In one exemplary embodiment, the cryogenic water pipe includes a first pipe section and a second pipe section disposed at least within the cryogenic zone of the tank body. One axial end opening of the first pipe section and one axial end opening of the second pipe section both extend outside the tank body. The portions of the first pipe section and the second pipe section located within the cryogenic zone can be interconnected or independent of each other. Specifically: the first pipe section is connected to the medium outlet of the second cold-side channel for introducing cryogenic energy storage water, after secondary heating by the second heat exchanger, into the tank body; the second pipe section is connected to the medium outlet of the fourth hot-side channel for introducing cryogenic energy storage water formed by heat exchange in the fourth heat exchanger into the tank body; and the second pipe section is connected to the medium inlet of the third cold-side channel to transport the cryogenic energy storage water in the tank body to the third heat exchanger.

[0015] In one exemplary embodiment, the solar collector is a vacuum tube solar water heater; the solar heating device further includes a circulation pipe and a circulation pump, a control valve, and a check valve disposed on the circulation pipe. The solar collector is disposed on the circulation pipe to realize the circulation flow of the heat collection medium in the circulation pipe. A portion of the circulation pipe forms the first hot side channel, and the control valve is used to control the opening and closing of the circulation pipe.

[0016] The technical solutions provided by the embodiments of this application include at least the following beneficial effects: The energy-saving system for adding solar energy to the brewery boiler disclosed in this application achieves automatic collection of solar heat through a solar collector. The heating process of the heat collector does not require the introduction of other energy sources. It utilizes solar energy, which is renewable and environmentally friendly, reducing energy consumption and environmental pollution problems in the wort boiling system. Furthermore, the storage tank can store solar energy and waste heat generated during boiling, and can in turn provide heat supplementation for the continued boiling of the boiler. This application saves on the use of external pipeline steam, reduces steam loss, reduces the boiling time of the wort in the boiler, improves production efficiency, and further reduces energy consumption and environmental pollution problems.

[0017] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the specification, serve to explain the principles of this application.

[0019] Figure 1 A schematic diagram of an energy-saving system for adding solar energy to a brewery boiler according to an embodiment of this application is shown.

[0020] The reference numerals in the attached drawings are explained as follows: 1-Boiler, 11-Steam outlet, 12-Internal heater, 13-Sedimentation tank, 2-Solar heating device, 21-Solar collector, 211-Vacuum tube, 212-Water tank, 22-Circulation pipeline, 23-Circulation pump, 24-Remote temperature sensor, 25-Check valve, 26-Control valve, 3-First heat exchanger, 31-Medium inlet pipe, 311-First control valve, 4-Second heat exchanger 5-Thermometer, 6-Storage tank, 61-High temperature zone, 62-Low temperature zone, 63-Tank body, 64-High temperature water pipe, 65-Low temperature water pipe, 651-First pipe section, 652-Second pipe section, 71-Third heat exchanger, 711-Waste discharge pipe, 712-Chimney, 72-Fourth heat exchanger, 73-First low temperature liquid storage pipe, 74-Second low temperature liquid storage pipe, 75-Low temperature drain pipe, 76-High temperature liquid storage pipe, 77-High temperature drain pipe. Detailed Implementation

[0021] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that the description of this application will be more complete and fully convey the concept of the exemplary embodiments to those skilled in the art.

[0022] In the description of this invention, all connection relationships mentioned do not refer to direct connection of components, but rather to the ability to form a better connection structure by adding or removing connecting accessories according to specific implementation conditions. The various technical features in this invention can be combined interactively without contradicting each other.

[0023] In the description of this invention, unless otherwise explicitly defined, terms such as setting, installing, and connecting should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0024] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0025] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than", "less than", "exceeding" are understood to exclude the number itself, and "above", "below", "within" are understood to include the number itself.

[0026] The energy-saving system for adding solar energy to the brewery boiler, as described in this application, is applied to the saccharification and boiling process in breweries. It adds a solar heating device 2 to the existing boiling system, allowing the heat storage medium to absorb solar heat through a first heat exchanger 3 for initial heating. Then, after secondary heating through a second heat exchanger 4, the heat storage medium is stored in a storage tank 6. The storage tank 6 stores heat for the boiling system in advance. The heat storage medium stored in the tank 6 provides the heat required for boiling the wort in the boiler 1, thus powering and heating the boiling process and ensuring continuous boiling of the wort to produce qualified wort. During the continued boiling of the wort in the boiler 1, the system reduces the direct use of steam from the external pipeline network, achieving energy saving, environmental protection, and reduced production costs.

[0027] Figure 1 A schematic diagram of the energy-saving system of the brewery boiler of this application, which adds solar energy to continue boiling, is shown.

[0028] Reference Figure 1 The energy-saving system for adding solar energy to the brewery's boiling unit to continue boiling includes a boiling unit 1, a solar heating device 2, a first heat exchanger 3, a second heat exchanger 4, a storage tank 6, a third heat exchanger 71, and a fourth heat exchanger 72.

[0029] Boiler 1 is used to boil the wort and generate steam. When boiler 1 is first turned on, it needs to exchange heat with the wort entering the boiler 1 using the heat of the high-temperature steam from the external pipeline network in order to boil the wort.

[0030] The boiler 1 has a steam outlet 11 for discharging steam. The steam outlet 11 is located at the top of the boiler 1. After the wort in the boiler 1 boils, a large amount of steam is generated and can be discharged outside the boiler 1 through the steam outlet 11.

[0031] The boiling vessel 1 of this application is equipped with an internal heater 12. The wort is fed into the boiling vessel 1, and high-temperature steam from an external pipeline is introduced into the internal heater 12 so that the high-temperature steam in the internal heater 12 can exchange heat with the wort in the boiling vessel 1, thereby boiling the wort. The condensate formed after the external high-temperature steam heats the wort is discharged into a condensate tank outside the boiling vessel 1.

[0032] The bottom outlet of the boiler 1 is connected to the external sedimentation tank 13. After the wort is boiled at high temperature, it is pumped into the sedimentation tank 13 for the next process. The purpose of the boiler 1 is to sterilize, concentrate the wort, add hops to give it flavor and aroma, and promote the combination of proteins and tannins to form sediment.

[0033] The solar collector 21 in this embodiment is a device that absorbs solar radiation and converts the absorbed solar energy into heat energy. The solar heating device 2 includes the solar collector 21, which is configured to absorb solar energy and heat an internal heat-collecting medium. In this embodiment, the heat-collecting medium can be tap water.

[0034] The solar collector 21 is a vacuum tube solar water heater, which includes multiple vacuum tubes 211 and a water tank 212.

[0035] The heat-collecting medium, heated by the vacuum tube 211, can naturally circulate into the water tank 212 under siphon action. Furthermore, the water tank 212 is equipped with an insulation layer on its outer perimeter, which insulates and prevents freezing of the heat-collecting medium inside the tank, reducing heat loss and ensuring it can always be used to heat the stored heat medium. In practical engineering applications, the solar heating device can include multiple sets or multiple solar collectors 21 to improve the heating efficiency of the heat-collecting medium.

[0036] The solar heating device 2 also includes a circulation pipe 22 and a circulation pump 23 installed on the circulation pipe 22.

[0037] The solar collector 21 is installed on the circulation pipe, and the circulation pump 23 can drive the heat collection medium to circulate in the circulation pipe. Under the action of the circulation pump 23, the heat collection medium heated in the solar collector 21 can flow into the circulation pipe, and the heat collection medium after heat exchange in the first heat exchanger 3 can flow back from the circulation pipe into the solar collector 21 for further heating.

[0038] The solar collector 21 has a temperature sensor 24 at its heat collection medium outlet, which can detect the temperature of the heated heat collection medium. For example, the temperature of the heat collection medium after absorbing solar energy through the solar collector 21 is 50°C.

[0039] A one-way valve 25 is also installed on the circulation pipeline to ensure that the heat collection medium can flow in one direction within the circulation pipeline, thus preventing the heat collection medium from flowing back.

[0040] A seventh control valve 26 is also provided on the circulation pipeline, which is used to control the opening and closing of the circulation pipeline. In this embodiment, the seventh control valve 26 is a pneumatic valve.

[0041] When the seventh control valve 26 is opened, the heat collection medium passing through the solar collector 21 can flow into the circulation pipe.

[0042] With the seventh control valve 26 in the closed state, the solar collector 21 always operates automatically under the siphon effect, and can absorb solar energy to heat the heat collection medium located in the vacuum tube 211, and the heated heat collection medium is stored in the water tank 212.

[0043] The solar collector 21 of this application can prepare and replenish the heated heat collection medium for the boiling system at all times, and can respond to the heat demand of the boiler 1 in a timely manner, so as to continuously provide heat for the boiler 1 to continue boiling the wort, improve production efficiency, and reduce consumption and emissions. At the same time, the heat collection medium realizes automatic collection of solar heat through the solar collector 21, reducing the introduction of other energy sources. It adopts solar energy with renewable and clean environmental protection characteristics, further reducing the consumption of fossil energy and environmental pollution problems of the wort boiling system.

[0044] The first heat exchanger 3 and the second heat exchanger 4 can heat the heat storage medium in sequence, and the heat storage medium after two heating cycles can be stored in the storage tank 6.

[0045] The first heat exchanger 3 of this application has a first hot side channel and a first cold side channel for heat exchange.

[0046] The first hot-side channel is used to introduce the heat collection medium heated by the solar collector 21. A portion of the circulation pipe in this application forms the first hot-side channel, and the heat collection medium can enter the first hot-side channel after the seventh control valve 26 is opened.

[0047] The first cold-side channel is used to introduce the heat storage medium. In this embodiment, the heat storage medium can be purified tap water.

[0048] Inside the first heat exchanger 3, the heat collection medium that has absorbed solar heat can preheat the heat storage medium that initially enters the system. By utilizing solar heat, the initial temperature of the heat storage medium entering the system can be increased, thereby achieving the purpose of supplementing the system with heat, improving the efficiency of subsequent reheating of the heat storage medium, and providing heat supplementation for the continued boiling of the boiler 1, thus achieving energy-saving effect.

[0049] For example, the temperature of the heat storage medium at the medium outlet of the first cold side channel in the first heat exchanger 3 is 45°C.

[0050] Furthermore, the first heat exchanger 3 in this embodiment can be a plate heat exchanger. The first hot-side channel and the first cold-side channel are independent of each other and can exchange heat.

[0051] This application also includes a medium inlet pipe 31. The medium inlet pipe 31 has an inlet end and two outlet ends that are interconnected. The inlet end is used to introduce the medium. A first control valve 311 is provided on the medium inlet pipe 31 at the position corresponding to the two outlet ends. The two first control valves 311 are used to control the opening and closing of the two outlet ends respectively. One outlet end is connected to the medium inlet of the first cold side channel in the first heat exchanger 3, and the other outlet end is connected to the heat collection medium inlet of the solar collector 21.

[0052] Specifically, the inlet end of the medium inlet pipe 31 can be used to introduce purified tap water. One outlet end of the medium inlet pipe 31 is connected to the first heat exchanger 3, and when the first control valve 311 is open, it provides the heat storage medium to the first heat exchanger 3. When the first control valve 311 is closed, the supply of heat storage medium to the first heat exchanger 3 is stopped. The other outlet end of the medium inlet pipe 31 is connected to the solar collector 21, and when the second control valve is open, it provides the solar heating device 2 with the heat collection medium. When the second control valve is closed, the supply of heat storage medium to the solar heating device 2 is stopped.

[0053] In this application, both the heat collection medium and the heat storage medium are tap water. The medium inlet pipe 31 can simultaneously supply the heat storage medium to the first heat exchanger 3 and the heat collection medium to the solar heating device 2, simplifying the pipeline design. In another embodiment, the inlet pipe of the heat storage medium and the inlet pipe of the heat collection medium can be independent of each other, and the heat storage medium and the heat collection medium can also be different media.

[0054] The second heat exchanger 4 of this application has a second hot side channel and a second cold side channel that are independent of each other and can exchange heat.

[0055] In this embodiment, the medium inlet of the second hot-side channel is used to introduce the condensate from the steam generated by the boiler 1. The condensate is generated during the boiling process of the wort in the boiler 1. The medium outlet of the second hot-side channel is used to discharge the low-temperature condensate after heat exchange. For example, this low-temperature condensate is 60°C.

[0056] The medium inlet of the second cold-side channel is connected to the medium outlet of the first cold-side channel, and is used to receive the heat storage medium after heat exchange with the heat collection medium in the first heat exchanger 3. The medium outlet of the second cold-side channel is connected to the storage tank 6. For example, the temperature of the heat storage medium at the outlet of the second cold-side channel is 79°C.

[0057] The heat storage medium is reheated by steam generated in the boiling device 1, which improves the waste heat utilization rate, achieves energy saving and environmental protection, optimizes energy use, and reduces energy waste. The heat storage medium, after being reheated by the second heat exchanger 4, is stored in the storage tank 6.

[0058] Furthermore, the second heat exchanger 4 in this embodiment can be a plate heat exchanger.

[0059] Furthermore, to improve the precise control of system pipeline temperature, thermometers 5 are installed at the four medium inlet and outlet of the first heat exchanger 3 and the four medium inlet and outlet of the second heat exchanger 4. This allows for the monitoring of the medium inlet and outlet temperatures of the first heat exchanger 3 and the second heat exchanger 4, achieving online, remote monitoring, management, and control of the medium temperature, facilitating the obtaining of real-time, effective, and usable temperatures of the heat storage medium by staff.

[0060] In actual production, the solar heating device 2 can circulate and heat the heat collection medium. The heated heat collection medium is discharged from the solar collector 21 to the first heat exchanger 3, which then pre-heats the heat storage medium entering the first heat exchanger 3, achieving the purpose of supplementing the system with heat. The pre-heated heat storage medium is then fed into the second heat exchanger 4, and the condensate from the steam generated by the boiler 1 is also discharged into the second heat exchanger 4, thus completing the secondary heating of the pre-heated heat storage medium, reducing energy consumption, improving energy utilization, and saving on production costs. The secondary-heated heat storage medium forms low-temperature energy storage water and is stored in the storage tank 6, thereby recovering the waste heat generated during the wort boiling process.

[0061] The storage tank 6 of this application has a low-temperature zone 62 for storing low-temperature energy storage water and a high-temperature zone 61 for storing high-temperature energy storage water. The temperature of the low-temperature energy storage water is lower than the temperature of the high-temperature energy storage water.

[0062] It should be noted that low-temperature energy storage water and high-temperature energy storage water are thermal storage media that reach a certain temperature range. In this embodiment, the temperature of the low-temperature energy storage water is 78℃-80℃, and the low-temperature energy storage water illustrated is 79℃ for illustrative purposes. In this embodiment, the temperature of the high-temperature energy storage water is 96℃-98℃, and the high-temperature energy storage water illustrated is 97℃ for illustrative purposes.

[0063] After being heated twice by the second heat exchanger 4, the heat storage medium forms low-temperature energy storage water. That is, the low-temperature energy storage water is a new "79°C heat storage medium" formed by the heat from solar energy and the waste heat discharged from the third heat exchanger 71 attached to the boiling device 1, after two cycles of heat exchange through gradient stacking, and is stored in the low-temperature zone 62 of the storage tank 6.

[0064] In addition, storage tank 6 can also absorb the heat from the steam generated by the boiler 1. Otherwise, a large amount of hot steam from the boiler 1 would be directly emitted from the chimney into the air outside the factory during the production process, resulting in a waste of energy. This allows the low-temperature stored water to be heated to form high-temperature stored water, which is then stored in the high-temperature zone 61 of storage tank 6. The high-temperature stored water in the high-temperature zone 61 can then provide heat for the boiler 1 to continue boiling the wort. After being heated, the high-temperature stored water cools down to form low-temperature stored water, which is then stored in the low-temperature zone 62. This reduces the amount of heat from the high-temperature steam supplied to the boiler 1 from the external pipeline network, achieving the self-sufficiency of energy internal circulation, reuse, and energy saving.

[0065] The storage tank 6 can store heat storage media at two temperatures at the same time, so as to store solar heat and steam waste heat from the boiler 1 into the storage tank 6, which facilitates heat recovery and reuse of the wort boiling system and improves energy utilization.

[0066] Furthermore, the storage tank 6 includes a tank body 63. The internal space of the tank body 63 includes a high-temperature zone 61 located at the top and a low-temperature zone 62 located at the bottom. According to the principle of water stratification, the high-temperature zone 61 and the low-temperature zone 62 can be interconnected. The upper high-temperature zone 61 stores high-temperature energy storage water at 96℃~98℃, and the lower low-temperature zone 62 stores low-temperature energy storage water at 78℃~80℃.

[0067] The third heat exchanger 71 of this application has a third hot-side passage and a third cold-side passage for heat exchange.

[0068] The third hot-side channel is connected to the steam outlet 11 on the boiler 1 and is used to introduce steam into the third heat exchanger 71.

[0069] The medium inlet of the third cold-side channel is connected to the low-temperature zone 62 of the storage tank 6, and the third cold-side channel can be used to receive low-temperature energy storage water in the storage tank 6. The medium outlet of the third cold-side channel is connected to the high-temperature zone 61 of the storage tank 6.

[0070] Wherein: the steam generated by boiling wort in the boiler 1 is used to heat the low-temperature energy storage water through the third heat exchanger 71. The heated low-temperature energy storage water forms high-temperature energy storage water and is stored in the high-temperature zone 61 of the storage tank 6.

[0071] Furthermore, the medium outlet of the third hot-side channel is connected to the medium inlet of the second hot-side channel, so that the steam after heat exchange in the third heat exchanger 71 forms steam condensate and is then introduced into the second hot-side channel of the second heat exchanger 4 for heating.

[0072] The steam generated by boiling wort in the boiler 1 first exchanges heat with low-temperature energy storage water through the third heat exchanger 71. The low-temperature energy storage water after heat exchange in the third heat exchanger 71 becomes high-temperature energy storage water and is stored in the high-temperature zone 61. The steam after heat exchange cools down to form steam condensate. The second heat exchanger 4 uses the condensate of the steam generated by the boiler 1 to heat the heat storage medium, thereby forming low-temperature energy storage water and storing it in the low-temperature zone 62 of the storage tank 6, thus realizing the secondary utilization of the waste heat generated by the boiling process of the boiler 1.

[0073] The third heat exchanger 71 in this embodiment is a shell-and-tube secondary steam condenser.

[0074] Furthermore, the third heat exchanger 71 is equipped with a waste discharge pipe 711. One axial end of the waste discharge pipe 711 is connected to the third hot-side channel, and the waste discharge pipe 711 is equipped with an adjustable pneumatic butterfly valve for on / off switching. The other axial end of the waste discharge pipe 711 is connected to a chimney 712. Clean, pollution-free, odorless, and low-heat flue gas is discharged from the chimney 712 through the waste discharge pipe 711.

[0075] In addition, thermometers 5 are installed at the four medium inlets and outlets of the second steam condenser to detect and manage the temperature of the heat storage medium in the corresponding pipelines.

[0076] The fourth heat exchanger 72 of this application has a fourth hot-side channel and a fourth cold-side channel for heat exchange. It can be used to heat wort.

[0077] The medium inlet of the fourth hot-side channel is connected to the high-temperature zone 61, and the medium outlet of the fourth hot-side channel is connected to the low-temperature zone 62. The medium inlet of the fourth cold-side channel is used to introduce wort, and the medium outlet of the fourth cold-side channel is connected to the interior of the boiler 1.

[0078] The wort is preheated by supplying high-temperature energy storage water in the high-temperature zone 61 to the fourth heat exchanger 72 to achieve the heating function. The heated wort enters the boiling vessel 1 for boiling. The high-temperature energy storage water after heat exchange forms low-temperature energy storage water and is stored in the low-temperature zone 62 of the storage tank 6.

[0079] Storage tank 6 stores a new "79°C heat storage medium" formed by storing solar energy and waste heat energy from boiler 1, and stores it in the low-temperature zone 62 of storage tank 6. The fourth heat exchanger 72 preheats the wort by using the high-temperature stored water in storage tank 6, reducing the supply of heat required from the external pipeline steam before the wort enters boiler 1, reducing the demand for external pipeline steam, improving heat utilization efficiency, realizing heat circulation and reuse of the system, and achieving energy-saving effect.

[0080] Furthermore, the brewery's boiling system, which incorporates a solar-powered boiling system, also includes a first low-temperature storage pipe 73, a second low-temperature storage pipe 74, a low-temperature drain pipe 75, a high-temperature storage pipe 76, and a high-temperature drain pipe 77.

[0081] The first cryogenic storage pipe 73 connects the medium outlet of the second cold-side channel and the cryogenic zone 62. The first cryogenic storage pipe 73 is used to transport the cryogenic energy storage water formed after secondary heating in the second heat exchanger 4 into the cryogenic zone 62 of the storage tank 6, thereby replenishing the cryogenic energy storage water in the storage tank 6. The first cryogenic storage pipe 73 is equipped with a second control valve for controlling its on / off state.

[0082] The second cryogenic storage pipe 74 connects the medium outlet of the fourth hot-side channel and the cryogenic zone 62. The second cryogenic storage pipe 74 is used to transport the cryogenic energy storage water formed in the fourth heat exchanger 72 into the cryogenic zone 62 of the storage tank 6. The second cryogenic storage pipe 74 is equipped with a third control valve for controlling its on / off state.

[0083] The cryogenic drain pipe 75 connects the cryogenic zone 62 and the medium inlet of the third cold-side channel. The cryogenic drain pipe 75 is used to transport the cryogenic energy storage water in the cryogenic zone 62 of the storage tank 6 to the third heat exchanger 71. The cryogenic drain pipe 75 is equipped with a fourth control valve for controlling its on / off state.

[0084] The high-temperature liquid storage pipe 76 connects the medium outlet of the third cold-side channel and the high-temperature zone 61. The high-temperature liquid storage pipe 76 is used to transport the high-temperature energy storage water formed in the third heat exchanger 71 to the high-temperature zone 61 of the storage tank 6. The high-temperature liquid storage pipe 76 is equipped with a fifth control valve for controlling its on / off state.

[0085] The high-temperature drain pipe 77 connects the high-temperature zone 61 and the medium inlet of the fourth hot-side channel. The high-temperature drain pipe 77 is used to transport the high-temperature stored water in the high-temperature zone 61 of the storage tank 6 to the fourth heat exchanger 72. A sixth control valve is installed on the high-temperature drain pipe 77 to control its on / off state.

[0086] The second, third, fourth, fifth, and sixth control valves mentioned above can all be pneumatic valves.

[0087] A first circulation of the heat storage medium is formed between the low-temperature drain pipe 75, the third cold-side channel of the third heat exchanger 71, the high-temperature storage pipe 76, and the storage tank 6. Specifically, the low-temperature energy storage water in the low-temperature zone 62 of the storage tank 6 enters the third heat exchanger 71 through the low-temperature drain pipe 75. The high-temperature steam generated by the boiling device 1 is introduced into the third heat exchanger 71 and heats the low-temperature energy storage water. The heated low-temperature energy storage water rises to form high-temperature energy storage water, which is then stored in the high-temperature zone 61 of the storage tank 6 through the high-temperature storage pipe 76.

[0088] A second circulation of the heat storage medium is formed between the high-temperature drain pipe 77, the fourth hot-side channel of the fourth heat exchanger 72, the second low-temperature storage pipe 74, and the storage tank 6. Specifically, the high-temperature stored water in the high-temperature zone 61 of the storage tank 6 enters the fourth heat exchanger 72 through the high-temperature drain pipe, while the lower-temperature wort (e.g., 74°C) is introduced into the fourth heat exchanger 72, where the high-temperature stored water exchanges heat with the wort. After heat exchange in the fourth heat exchanger 72, the high-temperature stored water cools down to form low-temperature stored water, which is then stored back into the low-temperature zone 62 of the storage tank 6 through the second low-temperature storage pipe 74.

[0089] The first and second circulation processes of the heat storage medium are accompanied by the heat absorption of low-temperature energy storage water and the heat release of high-temperature energy storage water. Both low-temperature and high-temperature energy storage water can be stored in and output from storage tank 6, enabling storage tank 6 to realize the heat recovery and reuse of the wort boiling system. A balance exists between the replenishment of low-temperature energy storage water from the second heat exchanger 4 to storage tank 6, the first circulation process of the heat storage medium, and the second circulation process of the heat storage medium, thereby ensuring the balance of the amount of low-temperature and high-temperature energy storage water in storage tank 6.

[0090] It should be noted that the fourth heat exchanger 72 and the third heat exchanger 71 operate in a staggered manner. Generally, the fourth heat exchanger 72 operates first, and after the wort preheats and is fed into the boiling vessel 1, transferring heat to the boiling vessel 1, the fourth heat exchanger 72 stops operating. The third heat exchanger 71 operates while the boiling vessel 1 is operating, to receive the wort steam from the boiling vessel 1. Therefore, the process of the high-temperature stored water in the storage tank 6 being discharged to the fourth heat exchanger 72 and the process of the high-temperature stored water formed by the third heat exchanger 71 entering the storage tank 6 are independent. Thus, the pipelines connecting the storage tank 6 to the media inlet of the fourth hot-side channel of the fourth heat exchanger and the media outlet of the third cold-side channel of the third heat exchanger 71 can be independent or shared, neither of which will affect the inflow and outflow of the high-temperature stored water.

[0091] In this embodiment, the storage tank also includes a high-temperature water pipe 64, which is connected to the top of the high-temperature zone 61 and is used to supply or discharge high-temperature stored water to or from the tank body 63. The outlet of the high-temperature liquid storage pipe 76 is connected to the inlet of the high-temperature drain pipe 77 and then to the high-temperature water pipe 64, simplifying the pipeline connection. Correspondingly, one of the fifth control valve and the sixth control valve opens the corresponding pipeline, while the other disconnects the corresponding pipeline.

[0092] It should be noted that the solar heating device 2, the first heat exchanger 3, and the second heat exchanger 4 can operate continuously, ensuring a constant supply of low-temperature stored water to the wort boiling system. Therefore, the pipeline from the second heat exchanger 4 to the storage tank 6 needs to be activated at all times. As mentioned above, the third heat exchanger 71 needs to wait for the fourth heat exchanger 72 to preheat the wort before starting the boiler 1. Therefore, the pipelines from the storage tank 6 to the third heat exchanger 71 and from the fourth heat exchanger 72 to the storage tank 6 supply low-temperature stored water separately.

[0093] Therefore, in order to avoid disrupting the delivery of cryogenic energy storage water, the first cryogenic liquid storage pipe 73 between the second heat exchanger 4 and the storage tank 6 needs to deliver cryogenic energy storage water independently, while the cryogenic drain pipe 75 between the storage tank 6 and the third heat exchanger 71 and the second cryogenic liquid storage pipe 74 between the storage tank 6 and the fourth heat exchanger 72 can be independent or shared.

[0094] In this embodiment, the outlet of the second cryogenic storage pipe 74 and the inlet of the cryogenic drain pipe 75 are connected, simplifying the pipe connection.

[0095] In this embodiment, the storage tank 6 also includes a cryogenic water pipe. The cryogenic water pipe 65 is connected to the bottom of the cryogenic zone 62 and is used for the inlet or outlet of cryogenic energy storage water.

[0096] Specifically, the low-temperature water pipe 65 includes a first pipe section 651 and a second pipe section 652, which are at least located in the low-temperature zone 62 of the tank body 63. The axial opening at one end of the first pipe section 651 and the axial opening at one end of the second pipe section 652 both extend outside the tank body 63. The portions of the first pipe section 651 and the second pipe section 652 located in the low-temperature zone 62 can be interconnected or independent of each other.

[0097] The first pipe section 651 is connected to the second heat exchanger 4 through the first cryogenic liquid storage pipe 73, and is used to introduce cryogenic energy storage water that has been heated twice by the second heat exchanger 4 into the tank 63.

[0098] The second pipe section 652 is connected to both the third heat exchanger 71 and the fourth heat exchanger 72. It is used to supply low-temperature energy storage water to the storage tank 6 through the fourth heat exchanger 72, or to supply low-temperature hot water to the third heat exchanger 71 through the storage tank 6.

[0099] Specifically, the second pipe section 652 is connected to the fourth heat exchanger 72 via the second cryogenic storage pipe 74, through which cryogenic energy storage water formed by heat exchange in the fourth heat exchanger 72 is introduced into the storage tank 6. Simultaneously, the second pipe section 652 is connected to the third heat exchanger 71 via the cryogenic drain pipe 75, allowing the cryogenic energy storage water in the tank 63 to be transported to the third heat exchanger 71. Correspondingly, one of the third control valve and the fourth control valve opens the corresponding pipeline, while the other disconnects the corresponding pipeline. In this embodiment, the outlet of the second cryogenic storage pipe 74 and the inlet of the cryogenic drain pipe 75 are interconnected, simplifying the pipe connection.

[0100] In a specific embodiment, the portions of the first pipe segment 651 and the second pipe segment 652 located in the low-temperature zone 62 are interconnected, and the ends of the first pipe segment 651 and the second pipe segment 652 in this embodiment are connected to form a U-shaped pipe structure. In another embodiment, the first pipe segment 651 and the second pipe segment 652 may also be staggered.

[0101] Furthermore, the portions of the first pipe section 651 and the second pipe section 652 located in the low-temperature zone 62 can be independent of each other, such as being spaced apart from each other or arranged in parallel.

[0102] In practice, the energy-saving system of adding solar energy to the brewery boiler in this embodiment does not initially reach its normal operating state after the initial startup. It requires injecting room-temperature tap water (e.g., 15°C) into the system into the tank 6. The wort in the boiler 1 needs to be heated and boiled entirely using external steam. Therefore, during the initial working stages of the first and second pots of boiling, a certain amount of time and steam from the external pipeline are needed to continuously absorb heat from the boiler 1 to reach its normal operating state. This allows the heat storage medium in the tank 6 to accumulate and reach the specified storage temperature, ultimately enabling the tank 6 to release heat to the boiler 1.

[0103] This application includes a solar heating device 2, and the storage tank 6 is used in conjunction with the first heat exchanger 3, the second heat exchanger 4, and the solar heating device 2. Because the solar collector 21 can always prepare the heated heat collection medium for the boiling system, in the initial state of the system, the solar heating device 2, the first heat exchanger 3, and the second heat exchanger 4 can be activated at any time. Therefore, the heat energy absorbed by the solar collector can be directly replenished and stored in the storage tank 6 through the energy storage medium, thereby enabling the stored heat storage medium in the storage tank 6 to reach the temperature after absorbing solar energy (e.g., 45°C). After starting the boiler 1, this embodiment can significantly reduce the boiling time of the wort in the boiler 1 and the amount of steam required from the external pipeline network, reducing energy consumption, shortening the heating time of the wort inside the boiler 1, and reducing the total boiling time, thus achieving energy saving and efficiency improvement.

[0104] The specific production process for this application is as follows: The first control valve 311 corresponding to the two outlet ends of the medium inlet pipe 31 is opened, allowing the solar heating device 2 to receive the heat collection medium and the first heat exchanger 3 to receive the heat storage medium. The solar heating device 2 can circulate and heat the heat collection medium. The heated heat collection medium is discharged from the solar collector 21 to the first heat exchanger 3, thereby initially heating the heat storage medium entering the first heat exchanger 3 to achieve the purpose of supplementing the system with heat.

[0105] The preheated heat storage medium is fed into the second heat exchanger 4, and the condensate from the steam generated during the boiling process of the wort in the boiler 1 is also supplied to the second heat exchanger 4, thereby completing the secondary heating of the preheated heat storage medium and achieving the water usage process requirements for the low-temperature energy storage water in the storage tank 6. The secondary-heated heat storage medium forms low-temperature energy storage water and is stored in the storage tank 6, entering the low-temperature zone 62.

[0106] The steam generated by boiling the wort in the boiler 1 is fed into the third heat exchanger 71. The third heat exchanger 71 heats the low-temperature energy storage water with the steam to form high-temperature energy storage water, which is then stored in the storage tank 6 and enters the high-temperature zone 61, thereby recovering the heat energy of the secondary steam in the wort boiling process 1.

[0107] After exchanging heat with low-temperature energy storage water in the third heat exchanger 71, the secondary steam condenses into condensate and is then introduced into the second heat exchanger 4. This allows the condensate to reheat the heat storage medium, forming low-temperature energy storage water, which is then stored in the storage tank 6 and enters the low-temperature zone 62. This enables the secondary recovery of the heat energy from the secondary steam during the boiling process of the wort in the boiler 1. Furthermore, the waste heat from the condensate of the secondary steam is used to generate new low-temperature energy storage water.

[0108] The high-temperature stored water in the storage tank 6 is fed into the fourth heat exchanger 72. The fourth heat exchanger 72 preheats the wort with the high-temperature stored water. The preheated wort enters the boiling vessel 1 for the next boiling stage. In the boiling vessel 1, the wort is sterilized, evaporated and concentrated, enzyme activity is terminated, hop aroma is extracted, and proteins and tannins in the wort are combined.

[0109] The energy-saving system disclosed in this application, which adds solar energy to the brewery's boiling unit for continued boiling, includes a storage tank 6 capable of storing solar heat and waste heat energy from the boiling unit 1, which in turn provides additional heat for the boiling unit 1 to continue boiling. By utilizing solar thermal energy to supplement the wort boiling system and recovering and storing the secondary steam heat energy from the boiling unit 1, the system improves thermal energy utilization, achieves heat circulation and reuse, saves on external pipeline steam consumption, reduces raw coal combustion consumption, lowers steam loss, achieves energy-saving effects, and shortens the wort heating time, thereby reducing the boiling time of the boiling unit 1 and improving production efficiency.

[0110] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the appended claims.

Claims

1. An energy-saving system for adding solar energy to a brewery's boiling unit for continued boiling, characterized in that, include: A boiling vessel, used to boil wort and produce steam; The storage tank has a high-temperature zone for storing high-temperature energy storage water and a low-temperature zone for storing low-temperature energy storage water; the temperature of the low-temperature energy storage water is lower than the temperature of the high-temperature energy storage water. A solar heating device includes a solar collector configured to absorb solar energy and heat an internal heat collection medium. The first heat exchanger has a first hot side channel and a first cold side channel for heat exchange. The first hot side channel is used to introduce the heated heat collection medium, and the first cold side channel is used to introduce the heat storage medium. The first heat exchanger can perform preliminary heating on the heat storage medium. The second heat exchanger has a second hot-side channel and a second cold-side channel for heat exchange. The second hot-side channel is used to introduce steam generated by the boiler or condensate of the steam generated by the boiler. The medium inlet of the second cold-side channel is connected to the medium outlet of the first cold-side channel, and the medium outlet of the second cold-side channel is connected to the low-temperature zone. The second heat exchanger can reheat the heat storage medium after the initial heat exchange to form the low-temperature energy storage water and store it in the low-temperature zone. The low-temperature energy storage water in the low-temperature zone absorbs the heat from the steam generated by the boiler to form high-temperature energy storage water, which is then stored in the high-temperature zone. The high-temperature energy storage water in the high-temperature zone provides heat for the boiler to continue boiling the wort, thereby forming low-temperature energy storage water, which is then stored in the low-temperature zone.

2. The energy-saving system for adding solar energy to the brewery boiler for continued boiling according to claim 1, characterized in that, Also includes: The medium inlet pipe has an inlet end and two outlet ends that are interconnected. The inlet end is used to introduce the medium. The medium inlet pipe is provided with a first control valve at the position corresponding to the two outlet ends. The two first control valves are used to control the opening and closing of the two outlet ends respectively. One outlet end is connected to the medium inlet of the first cold side channel, and the other outlet end is connected to the medium inlet of the solar collector.

3. The energy-saving system for adding solar energy to the brewery boiler for continued boiling according to claim 1, characterized in that, Also includes: The third heat exchanger has a third hot-side channel and a third cold-side channel for heat exchange, the boiler has a steam outlet for discharging the steam, the third hot-side channel is connected to the steam outlet for introducing the steam, the medium inlet of the third cold-side channel is connected to the low-temperature zone, and the medium outlet of the third cold-side channel is connected to the high-temperature zone. Wherein: the steam passes through the third heat exchanger to heat the low-temperature energy storage water, and the heated low-temperature energy storage water forms the high-temperature energy storage water and is stored in the high-temperature zone.

4. The energy-saving system for adding solar energy to the brewery boiler according to claim 3, characterized in that, The medium outlet of the third hot-side channel is connected to the medium inlet of the second hot-side channel so that the steam after heat exchange in the third heat exchanger forms condensate of the steam and is introduced into the second hot-side channel. The third heat exchanger is equipped with a waste discharge pipe, one axial end of which is connected to the third hot side channel. The waste discharge pipe is equipped with a shut-off valve, and the other axial end of the waste discharge pipe is connected to a chimney.

5. The energy-saving system for adding solar energy to the brewery boiler according to claim 3, characterized in that, Also includes: The fourth heat exchanger has a fourth hot-side channel and a fourth cold-side channel for heat exchange. The medium inlet of the fourth hot-side channel is connected to the high-temperature zone, and the medium outlet of the fourth hot-side channel is connected to the low-temperature zone. The medium inlet of the fourth cold-side channel is used to introduce wort, and the medium outlet of the fourth cold-side channel is connected to the interior of the boiler. Wherein: the high-temperature energy storage water is heated by the fourth heat exchanger, the heated wort enters the boiling vessel for boiling, and the high-temperature energy storage water after heat exchange forms the low-temperature energy storage water and is stored in the low-temperature zone.

6. The energy-saving system for adding solar energy to the brewery boiler according to claim 5, characterized in that, Also includes: The first cryogenic liquid storage pipe is connected between the medium outlet of the second cold side channel and the cryogenic zone, and is provided with a second control valve for controlling the on and off of the pipe. The second cryogenic storage pipe is connected between the medium outlet of the fourth hot side channel and the cryogenic zone, and is equipped with a third control valve for controlling the on / off state. A low-temperature drain pipe is connected between the low-temperature zone and the medium inlet of the third cold-side channel, and a fourth control valve is provided on it for controlling the on / off state.

7. The energy-saving system for adding solar energy to the brewery boiler according to claim 5, characterized in that, Also includes: A high-temperature liquid storage pipe is connected between the medium outlet of the third cold side channel and the high-temperature zone, and a fifth control valve for controlling the on / off state is provided on it. A high-temperature drain pipe is connected between the high-temperature zone and the medium inlet of the fourth hot-side channel, and a sixth control valve for controlling the on / off state is provided on it. The outlet of the high-temperature liquid storage pipe is connected to the inlet of the high-temperature liquid discharge pipe.

8. The energy-saving system for adding solar energy to the brewery boiler according to claim 5, characterized in that, The storage tank includes a tank body, a high-temperature water pipe, and a low-temperature water pipe; The tank extends vertically, and its internal space includes a high-temperature zone at the top and a low-temperature zone at the bottom, which are interconnected. The high-temperature water pipe is connected to the top of the high-temperature zone and is used to allow the high-temperature energy storage water to flow in or out. The low-temperature water pipe is connected to the bottom of the low-temperature zone and is used to introduce or drain the low-temperature energy storage water. The temperature of the low-temperature energy storage water is 78℃-80℃, and the temperature of the high-temperature energy storage water is 96℃-98℃.

9. The energy-saving system for adding solar energy to the brewery boiler according to claim 8, characterized in that, The low-temperature water pipe includes a first pipe section and a second pipe section, both located within the low-temperature zone of the tank. One axial end opening of the first pipe section and one axial end opening of the second pipe section extend outside the tank. The portions of the first and second pipe sections located within the low-temperature zone can be interconnected or independent of each other. The first pipe section is connected to the medium outlet of the second cold-side channel for introducing the low-temperature energy storage water, which has been reheated by the second heat exchanger, into the tank; the second pipe section is connected to the medium outlet of the fourth hot-side channel for introducing the low-temperature energy storage water formed by heat exchange in the fourth heat exchanger into the tank, and the second pipe section is connected to the medium inlet of the third cold-side channel so that the low-temperature energy storage water in the tank is transported to the third heat exchanger.

10. The energy-saving system for adding solar energy to the brewery boiler according to claim 1, characterized in that, The solar collector is a vacuum tube solar water heater. The solar heating device also includes a circulation pipe and a circulation pump, a control valve, and a check valve installed on the circulation pipe. The solar collector is installed on the circulation pipe to realize the circulation flow of the heat collection medium in the circulation pipe. A portion of the circulation pipe forms the first hot side channel. The control valve is used to control the opening and closing of the circulation pipe.

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