Intra-station heating system for long-distance hot water delivery pressure isolation station and relay station

Abstract

The utility model relates to the technical field of heat supply, in particular to an in-station heating system for a long-distance hot water delivery pressure isolation station and a relay station. The heating system comprises a dirt separator, a circulating pump, a space to be heated, a heating water supply pipeline, a heating water return pipeline, a primary net water return pipeline and a heat exchange station connected with the primary net water return pipeline. The input end of the dirt separator is communicated with a primary net water return pipeline; the first end of the heating water supply pipeline is communicated with the input end of the dirt separator and the primary net water return pipeline, and the second end of the heating water supply pipeline is provided with a first plug; the output end of the dirt separator is communicated with the access end of the circulating pump; the first end of the heating water return pipeline is communicated with the output end of the dirt separator and the access end of the circulating pump, and the second end of the heating water return pipeline is provided with a second plug; the space to be heated is located between the heating water supply pipeline and the heating water return pipeline. According to the technical scheme, heat can be supplied to a room in a station, meanwhile, a heating system can be optimized, and cost can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of heating technology, and in particular to a heating system for long-distance hot water pressure reducing stations and relay stations. Background Technology

[0002] With social development, centralized heating is rapidly becoming the preferred form of winter heating for urban residents in northern regions. As national environmental protection requirements become more stringent, combined heat and power (CHP) units, primarily used for heating in winter, offer advantages such as high energy efficiency and energy conservation. CHP plants are generally located far from urban heat users, averaging over 20km. Sometimes, significant elevation differences exist along the heating pipeline routes. In such cases, to overcome pipeline resistance and reduce system pressure, relay pump stations, pressure-reducing stations, or combinations thereof are typically installed for heating.

[0003] Pressure reducing stations or relay pump stations (collectively referred to as "station interiors") typically have duty rooms and restrooms. The heating source for these rooms comes from the station's supply and return water pipes. Since the long-distance supply water temperature of thermal power plants is generally between 120 and 130°C, and the return water temperature is between 50 and 60°C, while the design temperature of conventional heat users' radiators is between 80 and 90°C, mixing devices or heat exchange units are usually installed to lower the supply water temperature of the long-distance system before heating the rooms in the station. The addition of mixing devices or heat exchange units in the station increases the station building's footprint, investment, and the complexity of the station's heating system setup and operation. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a heating system for long-distance hot water pressure reducing stations and relay stations, which can provide heating to the rooms within the station while optimizing the heating system and reducing costs.

[0005] This utility model provides a heating system for long-distance hot water pressure reducing stations and relay stations, including:

[0006] Sludge separator, circulating pump, space to be heated, heating water supply pipe, heating return pipe, primary network return pipe and heat exchange station connected to the primary network return pipe;

[0007] The input end of the dirt separator is connected to the primary network return water pipe; the first end of the heating water supply pipe is connected to the input end of the dirt separator and the primary network return water pipe, and the second end of the heating water supply pipe is provided with a first plug;

[0008] The output end of the dirt separator is connected to the inlet end of the circulating pump; the first end of the heating return water pipe is connected to the output end of the dirt separator and the inlet end of the circulating pump, and the second end of the heating return water pipe is provided with a second plug.

[0009] The space to be heated is located between the heating water supply pipe and the heating water return pipe; a pressure difference is formed between the input and output ends of the dirt separator so that the fluid in the primary network return pipe heats the space to be heated when it flows through the dirt separator.

[0010] In some embodiments, the heating system for long-distance hot water pressure reducing stations and relay stations further includes:

[0011] First shut-off valve and second shut-off valve;

[0012] The first shut-off valve is located on the heating water supply pipe, and the second shut-off valve is located on the heating water return pipe.

[0013] In some embodiments, the heating system for long-distance hot water pressure reducing stations and relay stations further includes:

[0014] A balancing valve is installed on the heating return water pipe, and the second shut-off valve is located between the dirt remover and the balancing valve.

[0015] In some embodiments, the heating system for long-distance hot water pressure reducing stations and relay stations further includes:

[0016] The first air vent valve is located at a first position on the heating water supply pipe;

[0017] The first position is the position where the heating water supply pipe is furthest from the horizontal plane.

[0018] In some embodiments, the heating system for long-distance hot water pressure reducing stations and relay stations further includes:

[0019] The second air vent valve is located at a second position on the heating return water pipe;

[0020] The second position is the position where the heating return water pipe is furthest from the horizontal plane.

[0021] In some embodiments, the heating system for long-distance hot water pressure reducing stations and relay stations further includes:

[0022] The third shut-off valve and the fourth shut-off valve;

[0023] The third shut-off valve is located on the connecting pipe between the heating water supply pipe and the space to be heated, and the fourth shut-off valve is located on the connecting pipe between the heating return pipe and the space to be heated.

[0024] In some embodiments, the heating system for long-distance hot water pressure reducing stations and relay stations further includes:

[0025] A radiator located in the space to be heated, the radiator being connected between the heating water supply pipe and the heating water return pipe.

[0026] In some embodiments, the desiccant is a cyclone desiccant.

[0027] In some embodiments, the heating system for long-distance hot water pressure reducing stations and relay stations further includes:

[0028] Heating stations and primary water supply pipelines;

[0029] The heating station is connected to the heat exchange station via a primary network water supply pipeline, and the heating station is also connected to the heat exchange station via the primary network return water pipeline.

[0030] In some embodiments, the heating system for long-distance hot water pressure reducing stations and relay stations further includes:

[0031] The system includes an input pipe and an output pipe. The input end of the dirt separator is connected to the primary network return water pipe through the input pipe, and the first end of the heating water supply pipe is connected to the input pipe.

[0032] The output end of the dirt separator is connected to the circulating pump through the output pipe, and the first end of the heating return water pipe is connected to the output pipe.

[0033] The technical solution provided by this utility model has the following advantages compared with the prior art:

[0034] The heating system for long-distance hot water pressure reducing station and relay station provided in this embodiment includes: a dirt remover, a circulating pump, a space to be heated, a heating water supply pipe, a heating return pipe, a primary network return pipe, and a heat exchange station connected to the primary network return pipe;

[0035] The input end of the dirt separator for the heating system within the long-distance hot water pressure reducing station and relay station is connected to the primary network return water pipeline of the heating system within the long-distance hot water pressure reducing station and relay station; the first end of the heating water supply pipeline for the heating system within the long-distance hot water pressure reducing station and relay station is connected to the input end of the dirt separator for the heating system within the long-distance hot water pressure reducing station and relay station, and to the primary network return water pipeline of the heating system within the long-distance hot water pressure reducing station and relay station; the second end of the heating water supply pipeline for the heating system within the long-distance hot water pressure reducing station and relay station is equipped with a first plug;

[0036] The output end of the dirt separator for the heating system within the long-distance hot water pressure reducing station and relay station is connected to the input end of the circulating pump for the heating system within the long-distance hot water pressure reducing station and relay station; the first end of the heating return water pipe for the heating system within the long-distance hot water pressure reducing station and relay station is connected to the output end of the dirt separator for the heating system within the long-distance hot water pressure reducing station and relay station, and the input end of the circulating pump for the heating system within the long-distance hot water pressure reducing station and relay station; a second plug is provided at the second end of the heating return water pipe for the heating system within the long-distance hot water pressure reducing station and relay station.

[0037] The space awaiting heating in the heating system of the long-distance hot water pressure reducing station and relay station is located between the heating supply water pipeline and the heating return water pipeline of the heating system of the long-distance hot water pressure reducing station and relay station. A pressure difference is formed between the input and output ends of the dirt separator of the heating system of the long-distance hot water pressure reducing station and relay station, so that the fluid in the primary network return water pipeline of the heating system of the long-distance hot water pressure reducing station and relay station heats the space awaiting heating when it flows through the dirt separator. Therefore, this utility model embodiment, considering the small area, short transmission distance, and low resistance (average no more than 0.5m water column) of the rooms requiring heating within the station (e.g., pressure reducing stations and relay stations), integrates a sludge separator. Utilizing the at least 1m pressure difference between the two ends of the sludge separator during normal operation, the fluid flowing through the primary network return water pipe can circulate in the space to be heated, thus providing heat to that space. This solves the problems in related technologies where heating rooms within the station leads to increased floor space, higher investment, more complex heating system setup, and more complex operation and adjustment. This utility model embodiment can heat rooms within the station while optimizing the heating system and reducing setup costs. Attached Figure Description

[0038] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0039] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 A schematic diagram of the structure of a heating system for a long-distance hot water pressure reducing station and a relay station provided in this embodiment of the present invention;

[0041] Figure 2 This is a schematic diagram of another heating system for a long-distance hot water pressure reducing station and relay station provided as an embodiment of the present invention.

[0042] Among them, 10. Sludge separator; 11. Circulating pump; 12. Heating space; 13. Heating water supply pipe; 14. Heating return pipe; 15. Primary network return pipe; 16. First plug; 17. Second plug; 18. First shut-off valve; 19. Second shut-off valve; 20. Balancing valve; 21. Third shut-off valve; 22. Fourth shut-off valve; 23. Radiator; 24. Input pipe; 25. Output pipe; 26. Heating station; 27. Heat exchange station; 28. Primary network water supply pipe; 29. ​​First air vent valve; 30. Second air vent valve; A. Input end of sludge separator; B. Output end of sludge separator. Detailed Implementation

[0043] To better understand the above-mentioned objectives, features, and advantages of this utility model, the solution of this utility model will be further described below. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.

[0044] Many specific details are set forth in the following description in order to provide a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the present invention, and not all embodiments.

[0045] This utility model provides a heating system for long-distance hot water pressure reducing stations and relay stations. Considering the small area, short transmission distance, and low resistance (average no more than 0.5m water column) of the rooms requiring heating within the station (e.g., pressure reducing stations and relay stations), a sludge separator is integrated. Utilizing the at least 1m pressure difference across the separator during normal operation, the fluid flowing through the primary network return water pipe can circulate within the space to be heated, thus providing heat. This solves the problems of increased floor space, higher investment, more complex heating system setup, and more complex operation and adjustment associated with heating rooms in related technologies. This utility model embodiment can heat rooms within the station while optimizing the heating system and reducing setup costs.

[0046] The following description, in conjunction with the accompanying drawings, provides an exemplary description of the heating system provided by the present invention for long-distance hot water pressure reducing stations and relay stations.

[0047] Figure 1 This is a schematic diagram of a heating system for a long-distance hot water pressure reducing station and relay station, according to an embodiment of this utility model. Figure 1As shown, the heating system for the long-distance hot water pressure reducing station and relay station includes: a dirt separator 10, a circulating pump 11, a space to be heated 12, a heating water supply pipe 13, a heating water return pipe 14, a primary network return pipe 15, and a heat exchange station 27 connected to the primary network return pipe 15; the input end A of the dirt separator 10 is connected to the primary network return pipe 15; the first end of the heating water supply pipe 13 is connected to the input end A of the dirt separator 10 and the primary network return pipe 15, and the second end of the heating water supply pipe 13 is provided with a first plug 16;

[0048] The output end B of the dirt separator 10 is connected to the inlet end of the circulating pump 11; the first end of the heating return water pipe 14 is connected to the output end B of the dirt separator 10 and the inlet end of the circulating pump 11, and the second end of the heating return water pipe 14 is provided with a second plug 17; wherein, the space to be heated 12 is located between the heating supply water pipe 13 and the heating return water pipe 14; a pressure difference is formed between the input end A and the output end B of the dirt separator 10 so that the fluid in the primary network return water pipe 15 heats the space to be heated 12 when it flows through the dirt separator 10.

[0049] Specifically, when the dirt separator 10 is working normally, there is at least a pressure difference of 1m between its input end A and output end B. Furthermore, the space 12 to be heated described in this embodiment can be a room (duty room, toilet) within the station (e.g., a pressure reducing station or a relay station) that requires heating. These rooms are generally small in area, have short transport distances, and low resistance (averaging no more than 0.5m of water column).

[0050] Based on this, the present invention proposes the above-mentioned technical solution by utilizing the pressure difference existing at both ends of the dirt separator 10 during normal operation. Specifically, a heating water supply pipe 13 and a heating water return pipe 14 are installed between the space to be heated 12 (e.g., a pressure isolation station and a relay station) and the dirt separator 10. The input end A of the dirt separator 10 is connected to the primary network return pipe 15. The first end of the heating water supply pipe 13 is connected between the input end A of the dirt separator 10 and the primary network return pipe 15. The first end of the heating water return pipe 14 is connected between the output end B of the dirt separator 10 and the inlet end of the circulating pump 11. Thus, by utilizing the pressure difference of at least 1m that exists when the dirt separator 10 is working normally, the fluid flowing through the primary network return pipe 15 can be circulated in the space to be heated 12 to provide heat for the space to be heated 12.

[0051] Figure 1 The example shows a space 12 to be heated, including a station duty room, a station toilet, and other heated rooms within the station.

[0052] The heating system for long-distance hot water pressure reducing stations and relay stations provided in this embodiment includes: a dirt separator, a circulating pump, a space to be heated, a heating water supply pipe, a heating water return pipe, a primary network return pipe, and a heat exchange station connected to the primary network return pipe; the input end of the dirt separator is connected to the primary network return pipe; the first end of the heating water supply pipe is connected between the input end of the dirt separator and the primary network return pipe, and the second end of the heating water supply pipe is provided with a first plug; the output end of the dirt separator is connected to the inlet end of the circulating pump; the first end of the heating water return pipe is connected between the output end of the dirt separator and the inlet end of the circulating pump, and the second end of the heating water return pipe is provided with a second plug; wherein, the space to be heated is connected between the heating water supply pipe and the heating water return pipe; a pressure difference is formed between the input end and the output end of the dirt separator so that the fluid in the primary network return pipe heats the space to be heated when it flows through the dirt separator. Therefore, this utility model embodiment, considering the small area, short transmission distance, and low resistance (average no more than 0.5m water column) of the rooms requiring heating within the station (e.g., pressure reducing stations and relay stations), integrates a sludge separator. Utilizing the at least 1m pressure difference between the two ends of the sludge separator during normal operation, the fluid flowing through the primary network return water pipe can circulate in the space to be heated, thus providing heat to that space. This solves the problems in related technologies where heating rooms within the station leads to increased floor space, higher investment, more complex heating system setup, and more complex operation and adjustment. Therefore, this utility model embodiment can heat rooms within the station while optimizing the heating system and reducing setup costs.

[0053] In some embodiments, such as Figure 1 As shown, the heating system for the long-distance hot water pressure reducing station and relay station also includes: a first shut-off valve 18 and a second shut-off valve 19; the first shut-off valve 18 is installed on the heating water supply pipe 13, and the second shut-off valve 19 is located on the heating return water pipe 14.

[0054] Specifically, the first shut-off valve 18 is used to open or close the heating water supply pipe 13, and the second shut-off valve 19 is used to open or close the heating return water pipe 14. For example, both the first shut-off valve 18 and the second shut-off valve 19 can be configured as internally threaded gate valves or internally threaded ball valves.

[0055] Among them, the internal thread gate valve has the following advantages: (1) Simple structure: The gate valve has a relatively simple structure, mainly composed of valve body, valve disc, valve stem and other components, which are easy to manufacture and maintain; (2) Quick opening and closing: The working stroke is small and the opening and closing time is short, which can quickly realize the function of cutting off or connecting the fluid, and is suitable for occasions that require frequent opening and closing; (3) Good sealing performance: It belongs to the forced sealing valve, which forces the sealing surface to not leak by applying pressure to the valve disc, and the sealing performance is reliable. In addition, the friction between the sealing surfaces is small, not easy to wear, and has a long service life; (4) Precise control: The flow rate can be precisely adjusted by controlling the opening height of the valve disc, which has good adjustment performance and can meet the requirements of flow control under different working conditions; (5) Strong adaptability: It is usually made of stainless steel, copper, cast steel and other materials, which has good corrosion resistance and can be used for a long time in various harsh environments. It is suitable for a variety of media, such as fluid transportation pipelines in the petroleum, chemical, pharmaceutical and food industries. Based on this, both the first shut-off valve and the second shut-off valve are configured as threaded gate valves. The first shut-off valve has the aforementioned advantages of a threaded gate valve when applied to a heating water supply pipeline, and the second shut-off valve has the aforementioned advantages of a threaded gate valve when applied to a heating return water pipeline.

[0056] Among them, the internal thread ball valve has the following advantages: (1) Low fluid resistance: The fluid resistance coefficient of the ball valve is equal to that of the pipe section of the same length. In the fully open state, the medium can pass through the valve without obstruction. Even the reduced diameter ball valve has a relatively small fluid resistance, which can effectively reduce energy loss; (2) Compact structure: The structure is simple, the size is small and the weight is light, which makes it easy to install and disassemble. It is especially suitable for occasions with limited space. It has obvious advantages in some small pipeline systems or places with requirements for installation space; (3) Good sealing performance: The valve seat adopts an elastic sealing structure, which is reliable. At present, the sealing surface material of the ball valve is widely used as plastic, which has good sealing performance and can also be widely used in vacuum systems, which can effectively prevent medium leakage; (4) Convenient operation: It opens and closes quickly. It only needs to rotate 90° from fully open to fully closed. It is easy to operate and can easily realize automatic control and remote control. It can be configured with pneumatic, electric and other drive mechanisms; (5) Easy maintenance: The ball valve has a simple structure and the sealing ring is generally movable. It is easy to disassemble and replace, and the maintenance cost is low. Based on this, both the first shut-off valve and the second shut-off valve are configured as threaded ball valves. The first shut-off valve has the aforementioned advantages of threaded ball valves when applied to heating water supply pipelines, and the second shut-off valve has the aforementioned advantages of threaded ball valves when applied to heating return water pipelines.

[0057] In some embodiments, such as Figure 1As shown, the heating system for the long-distance hot water pressure reducing station and relay station also includes: a first air vent valve 29 and a second air vent valve 30; the first air vent valve 29 is located at a first position on the heating water supply pipe 13, and the second air vent valve 30 is located at a second position on the heating water return pipe 14; wherein, the first position is the position where the heating water supply pipe 13 is farthest from the horizontal plane, and the second position is the position where the heating water return pipe 14 is farthest from the horizontal plane.

[0058] For example, Figure 1 The first air vent valve 29 shown is located on the heating water supply pipe 13 and near the second end of the heating water supply pipe 13. This position can be the first position, that is, the position where the heating water supply pipe 13 is farthest from the horizontal plane. The second air vent valve 30 is located on the heating return water pipe 14 and near the second end of the heating return water pipe 14. This position can be the second position, that is, the position where the heating return water pipe 14 is farthest from the horizontal plane.

[0059] Therefore, by setting the first air vent valve 29, gas in the heating water supply pipe 13 can be removed, and by setting the second air vent valve 30, gas in the heating water return pipe 14 can be removed, which is beneficial for the circulation of fluid in the heating water supply pipe 13 and the heating water return pipe 14, and improves the heating effect of the space to be heated 12.

[0060] In some embodiments, such as Figure 1 As shown, the heating system for long-distance hot water pressure reducing station and relay station also includes: a balancing valve 20, which is installed on the heating return water pipe 14, and the second shut-off valve 19 is located between the dirt remover 10 and the balancing valve 20.

[0061] Specifically, a balancing valve 20 is installed on the heating return water pipe 14, which enables reasonable flow distribution. For example, by adjusting the opening of the balancing valve, the flow capacity of the valve is changed, thereby adjusting the flow resistance through the valve, ensuring that the flow ratio of each pipe in the heating system matches the design flow ratio. In this way, when the total flow rate of the heating system equals the design total flow rate, the flow rate of each pipe can also simultaneously reach the design flow rate, solving the problem of uneven room temperature in the heating system.

[0062] For example, by setting a balancing valve, the system pressure can be adjusted to help balance the pressure difference between different parts of the system and avoid some problems caused by uneven pressure. By increasing or decreasing local resistance, the system pressure distribution is made more uniform, ensuring the stable operation of the heating system.

[0063] In some embodiments, such as Figure 1 As shown, the connection type of the balance valve 20 is internal thread.

[0064] Specifically, the internal thread connection simplifies the connection between the balancing valve and the pipeline. Simply tighten the internal thread of the balancing valve to the corresponding external thread on the pipeline; no additional welding or flange connections are required, making installation relatively quick and effectively saving installation time and labor costs. Furthermore, the internal thread connection provides a good seal after tightening, reducing the possibility of fluid leakage. At the same time, the balancing valve itself typically uses high-quality sealing materials, such as PTFE and silicone, further improving sealing performance and effectively preventing media leakage.

[0065] In some embodiments, such as Figure 1 As shown, the heating system used in the long-distance hot water pressure reducing station and relay station also includes: a third shut-off valve 21 and a fourth shut-off valve 22; the third shut-off valve 21 is located on the connecting pipe between the heating water supply pipe 13 and the space to be heated 12, and the fourth shut-off valve 22 is located on the connecting pipe between the heating return water pipe 14 and the space to be heated 12.

[0066] Specifically, a third shut-off valve 21 is installed on the connecting pipe between the heating water supply pipe 13 and the space to be heated 12, and the opening and closing of the connecting pipe between the heating water supply pipe 13 and the space to be heated 12 are controlled by the third shut-off valve 21; a fourth shut-off valve 22 is installed on the connecting pipe between the heating return pipe 14 and the space to be heated 12, and the opening and closing of the connecting pipe between the heating return pipe 14 and the space to be heated 12 are controlled by the fourth shut-off valve 22.

[0067] For example, such as Figure 1 As shown, a third shut-off valve 21 is installed on the connecting pipe between the station duty room and the heating water supply pipe 13, and a fourth shut-off valve 22 is installed on the connecting pipe between the station duty room and the heating return water pipe 14; a third shut-off valve 21 is installed on the connecting pipe between the station toilet and the heating water supply pipe 13, and a fourth shut-off valve 22 is installed on the connecting pipe between the station toilet and the heating return water pipe 14; a third shut-off valve 21 is installed on the connecting pipe between other heated rooms in the station and the heating water supply pipe 13, and a fourth shut-off valve 22 is installed on the connecting pipe between other heated rooms in the station and the heating return water pipe 14.

[0068] In some embodiments, such as Figure 1 As shown, the dirt separator 10 is a cyclone dirt separator.

[0069] Specifically, cyclone separators have advantages such as high cleaning efficiency, resistance to clogging, online cleaning capability, low local resistance coefficient, large filtration area, and convenient maintenance. Therefore, this embodiment of the invention uses a cyclone separator to improve its working efficiency.

[0070] In some embodiments, Figure 2 This is a schematic diagram of another heating system for a long-distance hot water pressure reducing station and relay station, provided as an embodiment of the present invention. Figure 2 As shown, the heating system for the long-distance hot water pressure reducing station and relay station also includes: a radiator 23 located in the space to be heated 12, which is connected between the heating water supply pipe 13 and the heating water return pipe 14.

[0071] Therefore, the fluid transmitted in the heating water supply pipe 13 flows through the radiator and then through the heating return pipe 14. As it flows through the radiator, it dissipates heat to the space 12 to be heated.

[0072] In some embodiments, such as Figure 2 As shown, the heating system for the long-distance hot water pressure reducing station and relay station also includes: a heating station 26 and a primary network water supply pipeline 28. The heating station 26 is connected to the heat exchange station 27 through the primary network water supply pipeline 28. The heat exchange station 27 is also connected to the heat exchange station 27 through the primary network return water pipeline 15.

[0073] Specifically, heating station 26, also called a heat source plant, is where heat is generated in the centralized heating system. It heats water or steam by burning fuels (such as coal or natural gas) in a boiler or by utilizing other energy sources (such as geothermal energy or industrial waste heat), allowing these media to carry a large amount of heat and providing initial energy for the entire heating system. The primary heating water supply pipeline 13 is the heat transport channel: it is typically a high-temperature, high-pressure pipeline originating from heating station 26, responsible for transporting the high-temperature heat medium (hot water or steam) generated by heating station 26 to various heat exchange stations 27. These pipelines are generally wrapped with insulation material to reduce heat loss during transport, and to ensure effective long-distance heat transport, they are maintained in a high-temperature, high-pressure operating state.

[0074] The heat exchange station 27 is the hub for heat conversion. When the high-temperature heat medium in the primary heating water supply pipeline 13 is transported to the heat exchange station 27, the heat exchange station 27 uses heat exchange equipment (such as plate heat exchangers 23) to transfer the heat of the primary heat medium to the low-temperature heat medium in the secondary network, realizing heat exchange and conversion. After the heat exchange is completed in the heat exchange station 27, the cooled heat medium (return water) flows back to the heating station 26 through the primary network return water pipeline 15. The return water returning to the heating station 26 can be reheated, becoming a high-temperature heat medium again, and participating in the next round of heating cycle.

[0075] In some embodiments, such as Figure 1As shown, the heating system for the long-distance hot water pressure reducing station and relay station also includes: an input pipe 24 and an output pipe 25; the input end A of the dirt separator 10 is connected to the primary network return water pipe 15 through the input pipe 24, and the first end of the heating water supply pipe 13 is connected to the input pipe 24; the output end B of the dirt separator 10 is connected to the circulating pump 11 through the output pipe 25, and the first end of the heating return water pipe 14 is connected to the output pipe 25.

[0076] Therefore, the heating system provided by this utility model embodiment can be applied to long-distance hot water pressure isolation stations and relay stations. The heating system directly provides fluid to the rooms in the station that need heating through the pressure difference before and after the sludge remover in the primary network return water pipeline of the long-distance system in the station. Conventional radiators can be used in the rooms in the station, thus simplifying the heating system in the station, reducing the floor space, reducing engineering investment, and making operation and adjustment simple and convenient. At the same time, the radiators are also more aesthetically pleasing. The technical solution of this utility model embodiment can achieve the following effects: (1) The system directly provides fluid to the rooms in the station that need heating through the pressure difference before and after the sludge remover in the primary network return water pipeline of the long-distance system in the station, eliminating the need for a mixing device, reducing the floor space, and reducing engineering investment; (2) The system eliminates the need for a mixing device, thus simplifying the heating system in the station, making operation and adjustment simple and convenient, and saving operation and maintenance costs; (3) Conventional radiators can be used in the rooms in the station, which reduces the amount of steel used compared with hot water pipe radiators, and the appearance is also more aesthetically pleasing.

[0077] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0078] The above description is merely a specific embodiment of this utility model, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this utility model. Therefore, this utility model is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features of the utility model herein.

Claims

1. A heating system for long-distance hot water pressure reducing stations and relay stations, characterized in that, include: Sludge separator, circulating pump, space to be heated, heating water supply pipe, heating return pipe, primary network return pipe and heat exchange station connected to the primary network return pipe; The input end of the dirt separator is connected to the primary network return water pipe; the first end of the heating water supply pipe is connected to the input end of the dirt separator and the primary network return water pipe, and the second end of the heating water supply pipe is provided with a first plug; The output end of the dirt separator is connected to the inlet end of the circulating pump; the first end of the heating return water pipe is connected to the output end of the dirt separator and the inlet end of the circulating pump, and the second end of the heating return water pipe is provided with a second plug. The space to be heated is located between the heating water supply pipe and the heating water return pipe; a pressure difference is formed between the input and output ends of the dirt separator so that the fluid in the primary network return pipe heats the space to be heated when it flows through the dirt separator.

2. The heating system for long-distance hot water pressure reducing stations and relay stations according to claim 1, characterized in that, Also includes: First shut-off valve and second shut-off valve; The first shut-off valve is located on the heating water supply pipe, and the second shut-off valve is located on the heating water return pipe.

3. The heating system for long-distance hot water pressure reducing stations and relay stations according to claim 2, characterized in that, Also includes: A balancing valve is installed on the heating return water pipe, and the second shut-off valve is located between the dirt remover and the balancing valve.

4. The heating system for long-distance hot water pressure reducing stations and relay stations according to claim 1, characterized in that, Also includes: The first air vent valve is located at a first position on the heating water supply pipe; The first position is the position where the heating water supply pipe is furthest from the horizontal plane.

5. The heating system for long-distance hot water pressure reducing stations and relay stations according to claim 1, characterized in that, Also includes: The second air vent valve is located at a second position on the heating return water pipe; The second position is the position where the heating return water pipe is furthest from the horizontal plane.

6. The heating system for long-distance hot water pressure reducing stations and relay stations according to claim 1, characterized in that, Also includes: The third shut-off valve and the fourth shut-off valve; The third shut-off valve is located on the connecting pipe between the heating water supply pipe and the space to be heated, and the fourth shut-off valve is located on the connecting pipe between the heating return pipe and the space to be heated.

7. The heating system for long-distance hot water pressure reducing stations and relay stations according to claim 1, characterized in that, Also includes: A radiator located in the space to be heated, the radiator being connected between the heating water supply pipe and the heating water return pipe.

8. The heating system for long-distance hot water pressure reducing stations and relay stations according to claim 1, characterized in that, Also includes: Heating stations and primary water supply pipelines; The heating station is connected to the heat exchange station through the primary network water supply pipeline, and the heating station is also connected to the heat exchange station through the primary network return water pipeline.

9. The heating system for long-distance hot water pressure reducing stations and relay stations according to claim 1, characterized in that, Also includes: The system includes an input pipe and an output pipe. The input end of the dirt separator is connected to the primary network return water pipe through the input pipe, and the first end of the heating water supply pipe is connected to the input pipe. The output end of the dirt separator is connected to the circulating pump through the output pipe, and the first end of the heating return water pipe is connected to the output pipe.

10. The heating system for long-distance hot water pressure reducing stations and relay stations according to any one of claims 1-9, characterized in that, The desiccant is a cyclone desiccant.

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