A heating system

Abstract

The utility model discloses a heating system relates to heating device technical field, the utility model discloses a boiler body includes steam pocket, is equipped with first water inlet, first water outlet and atmospheric communication pipe on steam pocket, heat exchanger includes first heat exchange pipeline and second heat exchange pipeline, and first heat exchange pipeline has first import and first export, and second heat exchange pipeline has second import and second export, and is equipped with second water inlet and second water outlet on user end, first water outlet is connected through first pipeline and first import, and first export is communicated with first water inlet through second pipeline, because the hot water in steam pocket heats user end water through heat exchanger, and this alleviates the speed that steam pocket takes place electrochemistry corrosion and scale formation, prolongs the service life of boiler body, because heat exchanger is located the outside of boiler body, even if user end loop such as third pipeline, fourth pipeline leaks, and the medium of leakage also can not flow into steam pocket, further prolongs the service life of steam pocket and boiler body.

Description

Technical Field

[0001] This utility model relates to the field of heating device technology, and in particular to a heating system. Background Technology

[0002] Atmospheric pressure hot water boilers are a type of domestic boiler commonly used for heating and bathing. However, in existing technologies, the water inside the atmospheric pressure hot water boiler directly participates in the water circulation of the user's heating system. User use for bathing or leaks in the user's pipes can cause water loss from the boiler, increasing the frequency of water replenishment. The oxygen in the frequently added fresh water accelerates the electrochemical corrosion of the boiler. Furthermore, calcium and magnesium ions in the fresh water continuously precipitate and adhere to the inside of the boiler during heating, reducing its heating efficiency and making it prone to overheating in certain areas. This exacerbates boiler deformation and damage, significantly shortening the service life of atmospheric pressure hot water boilers.

[0003] Furthermore, to ensure the atmospheric pressure operation of atmospheric pressure hot water boilers, existing technologies often install on-off valves, i.e., quick-closing gate valves, to disconnect the boiler from the user end when the circulating water pump stops. This prevents the pressure from the user end (i.e., water flow) from being transmitted to the atmospheric pressure hot water boiler, causing it to expand and deform. However, because the sealing components and spring mechanism of the on-off valve are easily affected by environmental factors such as water quality and temperature, the on-off valve is difficult to close tightly. Some pressure from the user end will still be transmitted to the atmospheric pressure hot water boiler, causing it to deform and further shortening its service life.

[0004] Therefore, how to extend the service life of atmospheric pressure hot water boilers has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a heating system that extends the service life of an atmospheric pressure hot water boiler.

[0006] To achieve the above objectives, this utility model provides the following solution: This utility model provides a heating system, the heating system comprising: The boiler body includes a steam drum for storing water. The steam drum is provided with a first water inlet, a first water outlet and an atmospheric connection pipe that are connected to the steam drum. The atmospheric connection pipe is connected to the outside. A heat exchanger is located outside the boiler body and includes a first heat exchange pipe and a second heat exchange pipe. The medium in the first heat exchange pipe exchanges heat with the medium in the second heat exchange pipe through a heat exchange channel. The first heat exchange pipe has a first inlet and a first outlet connected to the first heat exchange pipe, and the second heat exchange pipe has a second inlet and a second outlet connected to the second heat exchange pipe. The user terminal is provided with a second water inlet and a second water outlet connected to the user terminal. Wherein, the first outlet is connected to the first inlet through a first pipe, the first outlet is connected to the first inlet through a second pipe, and a first delivery pump is provided on the first pipe and / or the second pipe; the second outlet is connected to the second inlet through a third pipe, the second outlet is connected to the second inlet through a fourth pipe, and a second delivery pump is provided on the third pipe and / or the fourth pipe.

[0007] Preferably, the atmospheric communication pipe is connected to an expansion tank that is connected to the outside, and the expansion tank is connected to the first water inlet through a fifth pipe.

[0008] Preferably, the heating system includes a water storage tank. The water storage tank is connected to the third or fourth pipe via a sixth pipe, and a third delivery pump is installed on the sixth pipe. Alternatively, the water storage tank is connected to the first water inlet via a seventh pipe, and a fourth delivery pump is installed on the seventh pipe.

[0009] Preferably, the first pipe and / or the second pipe are equipped with a dirt remover; and / or, a backup pipe is connected in parallel to the first pipe or the second pipe, and the backup pipe is equipped with a first valve.

[0010] Preferably, the dirt separator is connected in parallel with the backup pipeline.

[0011] Preferably, the first pipeline or the second pipeline is provided with two first delivery pumps connected in parallel.

[0012] Preferably, a check valve is provided on the second pipeline, which allows water to flow from the first outlet, through the first pipeline, the first heat exchange pipeline, and the second pipeline toward the first inlet; and / or, a thermometer and a pressure gauge are provided on the steam drum and the first pipeline.

[0013] Preferably, the user terminal includes a water distributor and a water collector connected together. The water distributor includes a main water distribution pipe connected to the fourth pipe. The main water distribution pipe is connected to the corresponding user terminal heating equipment through several branch water distribution pipes. The main water distribution pipe is provided with a first inlet. The water collector includes a main water collection pipe connected to the third pipe. The main water collection pipe is connected to the corresponding user terminal heating equipment through several branch water collection pipes.

[0014] Preferably, a second valve is provided at both the inlet and outlet of the first delivery pump.

[0015] The present invention achieves the following technical advantages over the prior art: The heating system of this utility model includes a boiler body, a heat exchanger, and a user end. The boiler body includes a steam drum for storing water. The steam drum is provided with a first water inlet, a first water outlet, and an atmospheric connection pipe connected to the steam drum. The atmospheric connection pipe is connected to the outside. The heat exchanger is located outside the steam drum and includes a first heat exchange pipe and a second heat exchange pipe. The medium in the first heat exchange pipe can exchange heat with the medium in the second heat exchange pipe through the heat exchange channel. The first heat exchange pipe has a first inlet and a first outlet connected to the first heat exchange pipe. The second heat exchange pipe has a second inlet and a second outlet connected to the second heat exchange pipe. The user end is provided with a second water inlet and a second water outlet connected to the user end. The first water outlet is connected to the first inlet through the first pipe, and the first outlet is connected to the first water inlet through the second pipe. A first delivery pump is provided on the first pipe and / or the second pipe. The second water outlet is connected to the second inlet through a third pipe, and the second outlet is connected to the second inlet through a fourth pipe. A second delivery pump is provided on the third pipe and / or the fourth pipe. When the heating system is in heating mode, under the action of the first delivery pump, hot water in the steam drum enters the first heat exchange pipe through the first outlet, the first pipe, and the first inlet. At the same time, under the action of the second delivery pump, cold water at the user end enters the second heat exchange pipe through the second outlet, the third pipe, and the second inlet. This allows the hot water in the first heat exchange pipe and the cold water in the second heat exchange pipe to exchange heat. After the heat exchange is completed, the cold water enters the steam drum again under the action of the first delivery pump through the first outlet, the second pipe, and the first inlet and is reheated by the boiler body. The hot water enters the user end under the action of the second delivery pump through the second outlet, the fourth pipe, and the second inlet to supply hot water to the user. In this design, the hot water inside the steam drum heats the incoming water at the user end through a heat exchanger and does not directly participate in the user end heating. This reduces the frequency of steam drum water replenishment due to user hot water use or leaks in user-end pipelines, thereby mitigating the rate of electrochemical corrosion and scaling in the steam drum and extending the service life of the steam drum and boiler body. Furthermore, because the heat exchanger is located outside the boiler body, even if leaks occur in the user-end circuits such as the third or fourth pipelines, the leaked medium will not flow into the steam drum. This reduces the possibility of leaked medium from the user-end circuits entering the steam drum and causing it to expand and deform, further extending the service life of the steam drum and boiler body. In summary, this utility model effectively extends the service life of an atmospheric pressure hot water boiler through the above-described structure. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the heating system. The components are as follows: 1. Boiler body; 2. Atmospheric connection pipe; 3. Heat exchanger; 4. First pipeline; 5. Second pipeline; 6. Third pipeline; 7. Fourth pipeline; 8. First transfer pump; 9. Second transfer pump; 10. Water distributor; 11. Water collector; 12. Expansion tank; 13. Fifth pipeline; 14. Water storage tank; 15. Sixth pipeline; 16. Third transfer pump; 17. Seventh pipeline; 18. Fourth transfer pump; 19. Sludge separator; 20. Backup pipeline; 21. Check valve; 22. Pressure gauge; 23. Thermometer; 24. First valve; 25. User-end heating equipment; 26. Water level gauge; 27. Flexible connection; 28. Second valve. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] like Figure 1 As shown, this utility model discloses a heating system, which includes a boiler body 1, a heat exchanger 3, and a user end. The boiler body 1 includes a steam drum for storing water, and the steam drum is provided with a first water inlet, a first water outlet, and an atmospheric connection pipe 2 connected to the steam drum. The atmospheric connection pipe 2 is connected to the outside. The heat exchanger 3 is located outside the steam drum and includes a first heat exchange pipe and a second heat exchange pipe. The medium in the first heat exchange pipe can exchange heat with the medium in the second heat exchange pipe through the heat exchange channel. The first heat exchange pipe has a first inlet and a first outlet connected to the first heat exchange pipe. The outlet has a second inlet and a second outlet connected to the second heat exchange pipe, and the user end has a second inlet and a second outlet connected to the user end; wherein, the first outlet is connected to the first inlet through the first pipe 4, the first outlet is connected to the first inlet through the second pipe 5, the first transfer pump 8 is provided on the first pipe 4 and / or the second pipe 5, the second outlet is connected to the second inlet through the third pipe 6, the second outlet is connected to the second inlet through the fourth pipe 7, and the second transfer pump 9 is provided on the third pipe 6 and / or the fourth pipe 7; When the heating system is in heating mode, under the action of the first delivery pump 8, hot water in the steam drum enters the first heat exchange pipe through the first outlet, the first pipe 4, and the first inlet. At the same time, under the action of the second delivery pump 9, cold water at the user end enters the second heat exchange pipe through the second outlet, the third pipe 6, and the second inlet. This allows the hot water in the first heat exchange pipe and the cold water in the second heat exchange pipe to exchange heat. After the heat exchange is completed, the cold water enters the steam drum again under the action of the first delivery pump 8 through the first outlet, the second pipe 5, and the first inlet and is reheated by the boiler body 1. The hot water enters the user end under the action of the second delivery pump 9 through the second outlet, the fourth pipe 7, and the second inlet to supply hot water to the user. In this design, the hot water in the steam drum heats the user-end inlet water via heat exchanger 3 and does not directly participate in user-end heating. This reduces the frequency of steam drum water replenishment due to user-end hot water use or user-end pipe leaks, thereby mitigating the rate of electrochemical corrosion and scaling in the steam drum and extending the service life of the steam drum and boiler body 1. Furthermore, because heat exchanger 3 is located outside the boiler body 1, even if user-end circuits such as the third pipe 6 and the fourth pipe 7 leak, the leaked medium will not flow into the steam drum. This reduces the possibility of leaked medium from user-end circuits entering the steam drum and causing it to expand and deform, further extending the service life of the steam drum and boiler body 1. In summary, this utility model effectively extends the service life of an atmospheric pressure hot water boiler through the above-mentioned structure.

[0021] The first and second heat exchange pipes refer to the pipes within heat exchanger 3 used for the flow of two media. The first and second heat exchange pipes are in contact. Depending on the type of heat exchanger 3, the heat exchange channel includes one or two layers of pipe walls. The two media entering heat exchanger 3 exchange heat through one or two layers of pipe walls. Specifically, heat exchanger 3 can be a plate heat exchanger 3 or a tubular heat exchanger 3, etc. The specific structure of heat exchanger 3 is existing technology and will not be described further here. The boiler body 1 is an existing atmospheric pressure hot water boiler; its specific structure will not be described further.

[0022] Furthermore, the atmospheric connection pipe 2, which connects to the outside environment, ensures that the steam drum remains connected to the outside under all circumstances, thereby reducing the possibility of steam drum expansion and deformation damage due to internal pressure buildup. This means that the boiler body 1 in this invention is an atmospheric pressure hot water boiler. Figure 1 As shown, the atmospheric connection pipe 2 in this utility model is connected to the expansion tank 12, and the expansion tank 12 is connected to the outside. This allows excess water to be discharged into the expansion tank 12 through the atmospheric connection pipe 2 when the pressure inside the steam drum increases due to rising water temperature or other factors. This reduces the possibility of the steam drum being damaged due to the internal pressure exceeding the safe value caused by a sudden pressure increase. At this time, the atmospheric connection pipe 2 is connected to the outside through the expansion tank 12, maintaining the steam drum at normal pressure. Furthermore, the expansion tank 12 is connected to the first inlet via the fifth pipe 13. When the expansion tank 12 is located at the top of the steam drum, after the pressure inside the steam drum decreases, the excess water in the expansion tank 12 can flow back into the steam drum through the fifth pipe 13 and the first inlet under its own gravity. Alternatively, when the expansion tank 12 is not located at the top of the steam drum, but is level with the steam drum or located at the bottom of the steam drum, a transfer pump can be installed on the fifth pipe 13. When the operator observes the pressure drop inside the steam drum through the pressure gauge 22 connected to the steam drum, the transfer pump can be manually started to add the excess water in the expansion tank 12 back into the steam drum.

[0023] The user end includes a water distributor 10 and a water collector 11, collectively referred to as the water distributor-water collector 11. The water collector 11 includes a main water collection pipe connected to the third pipe 6, which is connected to the corresponding user heating equipment through several water collection branch pipes. The water distributor 10 includes a main water distribution pipe connected to the fourth pipe 7, which is connected to the corresponding user heating equipment 25 through several water distribution branch pipes. As needed, a corresponding number of delivery pumps can be installed on the water distribution branch pipes and the water collection branch pipes to ensure smooth return of water at the user end.

[0024] like Figure 1As shown, check valves 21 are installed on both the first pipe 4 and the second pipe 5. These check valves 21 allow water to flow sequentially from the first outlet through the first pipe 4, the first heat exchange pipe, and the second pipe 5, and then back to the first outlet. Check valves 21 are also installed on the third pipe 6 and the fourth pipe 7. These check valves 21 allow water to flow sequentially from the second outlet through the third pipe 6, the second heat exchange pipe, and the fourth pipe 7, and then back to the second inlet. A check valve 21 on the sixth pipe 15 allows water to flow from the storage tank 14 towards the third pipe 6 or the fourth pipe 7. A check valve 21 on the fifth pipe 13 allows water to flow from the storage tank 14 towards the first inlet, specifically the expansion tank 12. By installing these check valves 21, damage to the first delivery pump 8, the second delivery pump 9, the third delivery pump 16, and the fourth delivery pump 18 is prevented from being caused by the water flow. The expansion tank 12 is equipped with a water level gauge 26 for detecting the water level inside the expansion tank 12. The water level gauge 26 is existing technology, and its specific structure will not be described in detail.

[0025] like Figure 1 As shown, pressure gauges 22 are installed on the first pipe 4, the third pipe 6, the sixth pipe 15, the water distributor 10, and the water collector 11 to reflect the pressure of the above structures in real time, allowing operators to make timely adjustments. Thermometers 23 are installed on the boiler body 1, the first pipe 4, the second pipe 5, the water distributor 10, and the water collector 11 to monitor the water temperature of the above structures and determine the operating status of the heating system. Furthermore, butterfly valves or ball valves 28 are installed at the inlet and outlet of the first transfer pump 8, the second transfer pump 9, the third transfer pump 16, the fourth transfer pump 18, the heat exchanger 3, and the dirt separator 19, so that in the event of a malfunction in any of the above structures, the corresponding second valves 28 can be closed for maintenance. The inlets and outlets of the first transfer pump 8, second transfer pump 9, third transfer pump 16, fourth transfer pump 18, and heat exchanger 3 are connected to the surrounding pipelines via flexible connections 27. Flexible connections 27 include flexible pipes made of rubber or plastic and connecting flanges at both ends of the flexible pipe. These flanges connect to the corresponding structures. Alternatively, the flanges can be omitted, and joints can be installed at both ends of the flexible pipe, with clamps used to fix the joints and corresponding structures together. When disassembly and maintenance are required, the pipelines and equipment can be separated without prying; the fixing bolts on the flanges can be removed, thus improving the convenience of maintenance. A filter 19 is installed on the first pipeline 4 and / or the second pipeline 5, and on the third pipeline 6 and / or the fourth pipeline 7. The filter 19 filters impurities in the water within the pipelines, performing decontamination treatment. The specific structure of the filter 19 is existing technology and will not be described in detail.

[0026] like Figure 1As shown, at least one of the first pipe 4, the second pipe 5, the third pipe 6, and the fourth pipe 7 is connected in parallel to a backup pipe 20. The backup pipe 20 is equipped with a first valve 24. When any of the first pipe 4, the second pipe 5, the third pipe 6, or the fourth pipe 7 fails, the valve on the corresponding pipe is closed, and the first valve 24 on the backup pipe 20 connected in parallel with the failed pipe is opened, ensuring the continuous operation of the heating system. Alternatively, as... Figure 1 As shown, the dirt separator 19 and the backup pipeline 20 are connected in parallel. This allows the valve on the pipeline containing the dirt separator 19 to be closed and the first valve 24 on the backup pipeline 20, which is connected in parallel with the dirt separator 19, to be opened when the dirt separator 19 needs maintenance, ensuring the continuous operation of the heating system. Furthermore, as... Figure 1 As shown, multiple pipelines are connected in parallel on the first pipeline 4 or the second pipeline 5, and each pipeline is equipped with a first delivery pump 8. Similarly, multiple pipelines are connected in parallel on the third pipeline 6 or the fourth pipeline 7, and each pipeline is equipped with a second delivery pump 9. This allows the other working first delivery pump 8 or second delivery pump 9 to be started if one of them fails, ensuring the continuous operation of the heating system and improving the heating system's ability to cope with emergencies.

[0027] like Figure 1 As shown, the heating system includes a water storage tank 14; the water storage tank 14 is connected to a third pipe 6 or a fourth pipe 7 via a sixth pipe 15, and a third delivery pump 16 is installed on the sixth pipe 15. Under the action of the third delivery pump 16, water can be replenished to the third pipe 6 or the fourth pipe 7 through the sixth pipe 15. And / or, the water storage tank 14 is connected to a first water inlet via a seventh pipe 17, and a fourth delivery pump 18 is installed on the seventh pipe 17. When the seventh pipe 17 is directly connected to the first water inlet, the fourth delivery pump 18 can supply water from the water storage tank 14 to the steam drum when the steam drum is short of water. Or, as Figure 1 As shown, the seventh pipe 17 is connected to the expansion tank 12. Water from the storage tank 14 is supplied to the expansion tank 12. When the steam drum is short of water, the expansion tank 12 will replenish it.

[0028] The operation process of the heating system is as follows: Cycle 1: The boiler body 1 heats the water in the steam drum. The heated water, under the action of the first delivery pump 8, enters the heat exchanger 3 through the first inlet via the first pipe 4. After the heating is completed, it flows along the second pipe 5 and is cleaned at the dirt remover 19 in the second pipe 5. The low-temperature clean water coming out of the dirt remover 19 continues to flow along the second pipe 5 and flows back to the steam drum for reheating. This cycle repeats to form Cycle 1. During this period, the water lost in the steam drum can be replenished through the third delivery pump 16 and the expansion tank 12. Cycle Two: The hot water from the second outlet of heat exchanger 3, after absorbing heat and heating up, enters the distributor 10 through the fourth pipe 7. From the distributor 10, it flows to the heating equipment at each user end for heat dissipation. After heat dissipation, the low-temperature water flows to the collector 11. The low-temperature water flowing out of the collector 11 flows along the third pipe 6 and is treated by the filter 19 on the third pipe 6. The clean water discharged from the filter 19 on the third pipe 6 continues to flow along the third pipe 6 and flows back to the second inlet of heat exchanger 3. It then enters heat exchanger 3 and exchanges heat with the boiler hot water entering heat exchanger 3 through the heat exchange channel. This process is repeated to form Cycle Two. Working principle: The boiler body 1 is a heat energy conversion device that provides hot water. The heat energy generated by the fuel is transferred to the water in the steam drum through the radiation and convection heating surfaces inside the boiler, which raises the water temperature. The first transfer pump 8 extracts the hot water from the steam drum and sends it to the first inlet of the heat exchanger 3, i.e., the hot medium inlet. After releasing heat, the hot water returns to the boiler body 1 through the first outlet of the heat exchanger 3, i.e., the cold medium outlet, to be heated, completing the first circulation system. At the same time, the second transfer pump 9 extracts the return water from the user end and sends it to the second inlet of the heat exchanger 3, i.e., the cold medium inlet. After absorbing heat, the water is sent to the user end heating equipment 25 through the second outlet of the heat exchanger 3, i.e., the hot medium outlet, to complete the second circulation system.

[0029] Furthermore, since the water in the boiler system does not participate in the circulation between the third pipe 6, the user end, the heat exchanger 3, and the fourth pipe 7, the energy loss caused by the need to treat the replenished water due to severe water loss is reduced. The elimination of on / off valves eliminates potential malfunctions, reduces noise, and lowers the workload for personnel. Simultaneously, the closed-loop water circulation between the third pipe 6, the user end, the heat exchanger 3, and the fourth pipe 7 reduces pressure loss compared to open-loop circulation, significantly lowering the operating pressure (head) of the second delivery pump 9, thus reducing the energy consumption of the heating system and alleviating the economic burden on users.

[0030] In this document, "several" refers to at least one. "And / or" refers to text content preceding "and / or," and text content following "and / or" can exist simultaneously or individually. For example, "A and / or B" includes the existence of only A or B, as well as the simultaneous existence of A and B. This utility model discloses multiple technical solutions, but does not provide any contrary technical teachings. Any content not covered in this utility model is applicable to existing technologies.

[0031] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A heating system, characterized in that, The heating system includes: The boiler body includes a steam drum for storing water. The steam drum is provided with a first water inlet, a first water outlet and an atmospheric connection pipe that are connected to the steam drum. The atmospheric connection pipe is connected to the outside. A heat exchanger is located outside the boiler body and includes a first heat exchange pipe and a second heat exchange pipe. The medium in the first heat exchange pipe exchanges heat with the medium in the second heat exchange pipe through a heat exchange channel. The first heat exchange pipe has a first inlet and a first outlet connected to the first heat exchange pipe, and the second heat exchange pipe has a second inlet and a second outlet connected to the second heat exchange pipe. The user terminal is provided with a second water inlet and a second water outlet connected to the user terminal. Wherein, the first outlet is connected to the first inlet through a first pipe, the first outlet is connected to the first inlet through a second pipe, and a first delivery pump is provided on the first pipe and / or the second pipe; the second outlet is connected to the second inlet through a third pipe, the second outlet is connected to the second inlet through a fourth pipe, and a second delivery pump is provided on the third pipe and / or the fourth pipe.

2. The heating system according to claim 1, characterized in that The atmospheric connection pipe is connected to an expansion tank that is connected to the outside world, and the expansion tank is connected to the first water inlet through a fifth pipe.

3. The heating system according to claim 1, characterized in that, The heating system includes a water storage tank. The water storage tank is connected to the third or fourth pipe via a sixth pipe, and a third delivery pump is installed on the sixth pipe. Alternatively, the water storage tank is connected to the first water inlet via a seventh pipe, and a fourth delivery pump is installed on the seventh pipe.

4. The heating system according to claim 1, characterized in that, The first pipe and / or the second pipe are equipped with a dirt remover; and / or, a backup pipe is connected in parallel to the first pipe or the second pipe, and the backup pipe is equipped with a first valve.

5. A heating system according to claim 4, characterised in that, The dirt separator is connected in parallel with the backup pipeline.

6. The heating system according to claim 1, characterized in that, Two first delivery pumps are connected in parallel on the first pipeline or the second pipeline.

7. The heating system of claim 1, wherein, The second pipeline is equipped with a check valve, which allows water to flow from the first outlet, through the first pipeline, the first heat exchange pipeline, and the second pipeline toward the first inlet; and / or, the steam drum and the first pipeline are equipped with a thermometer and a pressure gauge.

8. The heating system of claim 1, wherein, The user terminal includes a water distributor and a water collector connected together. The water distributor includes a main water distribution pipe connected to the fourth pipe. The main water distribution pipe is connected to the corresponding user terminal heating equipment through several branch water distribution pipes. The main water distribution pipe is provided with a first inlet. The water collector includes a main water collection pipe connected to the third pipe. The main water collection pipe is connected to the corresponding user terminal heating equipment through several branch water collection pipes.

9. The heating system of claim 1, wherein, The first delivery pump is equipped with a second valve at both its inlet and outlet.

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