Energy station system constructed by utilizing urban heating primary pipe network

Abstract

The utility model relates to the technical field of urban heating pipe network utilization, and particularly discloses an energy station system constructed by utilizing an urban heating first-stage pipe network, which comprises a first-stage pipe network water supply pipe and a first-stage pipe network water return pipe, the heat utilization equipment is connected with the primary pipe network water return pipe through a hot water return pipe, and the heat utilization equipment is one of a hot water type absorption cooling-water machine, a flash tank or a heat exchanger. According to the system, heat of hot water in a city heating primary pipe network can be used for refrigerating, ice making, steam making and hot water making in the non-heating period, waste heat is fully utilized, and energy waste and treatment cost caused by waste heat emptying are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of urban heating pipe network utilization, in particular to an energy station system constructed by utilizing a primary urban heating pipe network. Background Art

[0002] Winter heating in cities and industrial parks now uses waste heat from power plants, thermal power plants, petrochemicals, coking, steel and other large industries in and around the city, which is processed into hot water required for heating. The water supply temperature of the primary urban heating network is about 80℃-130℃. According to the winter temperature in various places, the heating period is about 3-6 months. The heating system and heating companies cannot work most of the year. In addition, the waste heat generated by industrial waste heat heating companies cannot be directly discharged except during the heating period, which increases the processing costs and environmental hazards.

[0003] Large hotels, hospitals, office buildings, supermarkets, schools, factories, residential buildings and other places that use the city's primary heating network for heating in winter also have needs for cooling, ice making or steam in summer. Electricity or natural gas is usually used to meet the above needs, which requires separate equipment and investment in electricity and gas capacity expansion, and the operating cost is very high. Utility Model Content

[0004] In order to solve the problems that the waste heat as the heat source of the primary pipe network of urban heating is not fully utilized and is wasted in the non-heating period, and the cost is high when the heating place is used for cooling, making ice, making steam and making hot water in the non-heating period, the utility model provides an energy station system constructed by using the primary pipe network of urban heating to use the waste heat of the heat source plant as the energy required for cooling, making ice, making steam and making hot water in the non-heating period.

[0005] In order to solve the above technical problems, the utility model comprises a primary pipe network water supply pipe and a primary pipe network water return pipe, wherein the primary pipe network water supply pipe is connected to a heat-using device through a hot water inlet pipe, and the heat-using device is connected to the primary pipe network water return pipe through a hot water return pipe, and its structural characteristics are: the heat-using device is one of a hot water type absorption chiller, a flash tank or a heat exchanger;

[0006] When the heat-using equipment is a hot water absorption chiller, the hot water absorption chiller is connected to a cooling tower through a cooling circulation pipeline, and the hot water absorption chiller is also connected to a cold water user or an ice maker through a circulation pipeline. When the hot water absorption chiller is connected to a cold water user, the hot water absorption chiller and the cold water user are connected through a cold water circulation pipeline; when the hot water absorption chiller is connected to an ice maker, the hot water absorption chiller and the ice maker are connected through a refrigerant circulation pipeline, and the ice maker is also connected to an ice maker water inlet pipe and an ice water outlet pipe;

[0007] When the heat-using equipment is a flash tank, the flash tank is connected to a first tap water pipe, and the top of the flash tank is connected to a steam exhaust pipe;

[0008] When the heat-using device is a heat exchanger, the heat exchanger is connected to a second tap water pipe, and the heat exchanger is connected to a hot water user through a hot water outlet pipe.

[0009] After adopting the above structure, part of the hot water in the primary pipe network water supply pipe enters the heat-using equipment through the hot water inlet pipe. The heat-using equipment uses the heat in the hot water as energy for cooling, making ice, making steam, and making hot water. The hot water after absorbing the heat enters the return pipe of the primary pipe network through the hot water return pipe. When using the heat in the primary pipe network of urban heating for cooling or ice making, the heat-using equipment adopts a hot water absorption chiller. The hot water absorption chiller absorbs the heat of the hot water in the primary pipe network for cooling, and provides circulating cold water for cold water users who need circulating cold water. The hot water absorption chiller is connected to the cold water users through a cold water circulation pipeline. The cold water obtained by cooling and cooling the hot water absorption chiller enters the cold water users through the cold water circulation pipeline, and is heated after passing through the cold water users. The water enters the hot water absorption chiller through the cold water circulation pipeline and is cooled down again, and circulates; when making ice, the hot water absorption chiller is connected to the ice maker through the refrigerant circulation pipeline, and the refrigerant obtained by cooling and cooling the hot water absorption chiller enters the ice maker through the refrigerant circulation pipeline, and the refrigerant heated after passing through the ice maker enters the hot water absorption chiller through the refrigerant circulation pipeline and is cooled down again, and circulates, and the external water source enters the ice maker through the ice maker water inlet pipe to exchange heat with the refrigerant in the refrigerant circulation pipeline, and the obtained ice water is discharged through the ice water outlet pipe 74; the hot water absorption chiller is connected to the cooling tower through the cooling circulation pipeline, and the cooling circulation pipeline cools the hot water absorption chiller. When using the heat in the primary pipe network of urban heating to produce steam, the heat-using equipment uses a flash tank, and tap water enters the flash tank through the first tap water pipe. After entering the flash tank, the tap water exchanges heat with the hot water in the hot water inlet pipe. After absorbing heat, the tap water evaporates to produce steam, and the steam is discharged through the steam discharge pipe at the top of the flash tank; the hot water absorption chiller is connected to the cooling tower through the cooling circulation pipeline, and the cooling circulation pipeline cools the hot water absorption chiller. When using the heat in the primary pipe network of urban heating to produce hot water, the heat-using equipment uses a heat exchanger, and tap water enters the heat exchanger through the second tap water pipe. After entering the heat exchanger, the tap water exchanges heat with the hot water in the hot water inlet pipe to increase the temperature. The hot water obtained after absorbing heat is provided to hot water users through the hot water outlet pipe.

[0010] A heat meter for measuring the heat consumption of the heat-consuming equipment is arranged between the hot water inlet pipe and the hot water return pipe.

[0011] The hot water inlet pipe is provided with a heating device for heating the hot water.

[0012] The first tap water pipe is provided with a water processor for purifying tap water.

[0013] The steam discharge pipe is provided with a water vapor compressor for extracting and compressing the steam and a pressure stabilizing tank for stabilizing the steam pressure, which are arranged in sequence along the steam flow direction.

[0014] When the heat-using equipment is a hot water absorption chiller or a flash tank, a secondary heat exchanger is further provided between the primary pipe network water supply pipe, the primary pipe network return pipe and the chiller or the flash tank, a secondary heat supply circulation pipeline is provided between the secondary heat exchanger and the chiller or the flash tank, the hot water inlet pipe and the hot water return pipe are both connected to the secondary heat exchanger, and the primary pipe network water supply pipe, the primary pipe network return pipe form a primary heat supply circulation pipeline for heating water in the secondary heat supply circulation pipeline through the hot water inlet pipe, the hot water return pipe and the secondary heat exchanger.

[0015] The utility model utilizes the energy station system constructed by the primary pipe network of urban heating, and uses the thermal energy of hot water in the primary pipe network as the energy of hot water type absorption chiller, flash tank and heat exchanger, so as to realize refrigeration, ice making, steam making and hot water making by utilizing the primary pipe network of urban heating in the non-heating period. When the hot water temperature does not meet the demand, the hot water can be heated by a heater or a high-temperature water flow heat pump, so as to effectively utilize the waste heat generated by the heat source plant and reduce the waste and processing cost caused by the discharge of waste heat. The primary pipe network of urban heating and the energy station can be directly connected or connected through a secondary heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of Example 1;

[0017] Figure 2 It is a structural schematic diagram of Example 2;

[0018] Figure 3 It is a structural schematic diagram of Example 3;

[0019] Figure 4 It is a structural schematic diagram of Example 4;

[0020] Figure 5 It is a structural schematic diagram of Example 5;

[0021] Figure 6 It is a structural schematic diagram of Example 6;

[0022] Figure 7 is a schematic structural diagram of Example 7;

[0023] Figure 8 It is a structural schematic diagram of Example 8;

[0024] Fig. 9This is a schematic diagram of the primary pipe network of Example 1 being connected to the energy station via the secondary heat exchanger;

[0025] Fig.10 This is a schematic diagram of the primary pipe network of Example 3 being connected to the energy station via the secondary heat exchanger;

[0026] Fig.11 This is a schematic diagram of the primary pipe network of Example 5 being connected to the energy station via the secondary heat exchanger;

[0027] In the figure: 1. primary network water supply pipe; 11. hot water inlet pipe; 111. heating equipment; 2. primary network return pipe; 21. hot water return pipe; 3. heat meter; 4. hot water absorption chiller; 5. cooling tower; 51. cooling water inlet pipe; 52. cooling water return pipe; 6. cold water user; 61. cold water return pipe; 62. cold water supply pipe; 7. ice maker; 71. refrigerant outlet pipe; 711. circulating pump; 72. refrigerant inlet pipe; 73. ice maker inlet pipe; 74. ice water outlet pipe; 8. flash tank; 81. steam discharge pipe; 811. steam compressor; 812. pressure regulating tank; 82. first tap water inlet pipe; 821. water treatment device; 9. heat exchanger; 91. second tap water inlet pipe; 92. hot water outlet pipe; 10. hot water user; 12. secondary heat exchanger. DETAILED DESCRIPTION Example 1

[0028] Reference Figure 1 A circulating cold water system constructed by using the primary pipe network of urban heating includes a primary pipe network water supply pipe 1 and a primary pipe network return pipe 2. The primary pipe network water supply pipe 1 is provided with a hot water inlet pipe 11, and the primary pipe network return pipe 2 is provided with a hot water return pipe 21. The hot water inlet pipe 11 and the hot water return pipe 21 are both connected to a hot water absorption chiller 4. A heat meter 3 for measuring the heat consumption is provided between the hot water inlet pipe 11 and the hot water return pipe 21, which is convenient for settlement with the heating company. The hot water in the primary pipe network water supply pipe 1 enters the hot water absorption chiller 4 through the hot water inlet pipe 11. After the heat in the hot water is absorbed, it enters the primary pipe network return pipe 2 through the hot water return pipe 21. The hot water absorption chiller 4 usually adopts a lithium bromide absorption chiller, and its structure and principle are prior art and will not be described in detail here. Figure 1 As shown, the hot water absorption chiller 4 is connected to the cold water user 6 through a cold water circulation pipeline. Specifically, a cold water return pipe 61 and a cold water supply pipe 62 are provided between the hot water absorption chiller 4 and the cold water user 6. The circulating cold water circulates between the hot water absorption chiller 4 and the cold water user 6 through the cold water return pipe 61 and the cold water supply pipe 62. Figure 1As shown, the hot water absorption chiller 4 is also connected to the cooling tower 5 through a cooling circulation pipeline. Specifically, a cooling water inlet pipe 51 and a cooling water return pipe 52 are provided between the hot water absorption chiller 4 and the cooling tower 5. The circulating cooling water circulates between the hot water absorption chiller 4 and the cooling tower 5 through the cooling water inlet pipe 51 and the cooling water return pipe 52 to cool the hot water absorption chiller 4.

[0029] Working process: Take 90℃ hot water to produce 7-12℃ cold water for building refrigeration or industrial cooling as an example. 90℃ hot water enters the hot water absorption chiller 4 through the hot water inlet pipe 11. The hot water absorption chiller 4 uses the heat of the hot water as energy to cool the circulating cold water entering the hot water absorption chiller 4 through the cold water return pipe 61. The circulating cold water entering the hot water absorption chiller 4 through the cold water return pipe 61 is at a temperature of 10-18℃. It is reduced to 7-12℃ by the hot water absorption chiller 4. The cooled cold water is then sent to the cold water supply pipe 61. 62 is used for building refrigeration or industrial cooling. The temperature of the cold water after building refrigeration or industrial cooling rises to 10-18°C, and then enters the hot water absorption chiller 4 through the cold water return pipe 61 for cooling and circulation; the temperature of the hot water after absorbing heat in the hot water absorption chiller 4 drops to 65°C, and enters the primary pipe network return pipe 2 through the hot water return pipe 21; the temperature of the circulating cooling water entering the hot water absorption chiller 4 through the cooling water inlet pipe 51 is 32°C, and the temperature of the circulating cooling water entering the cooling tower 5 through the cooling water return pipe 52 is 35°C.

[0030] Reference Fig. 9 A secondary heat exchanger 12 can also be arranged between the primary pipe network water supply pipe 1, the primary pipe network return pipe 2 and the hot water absorption chiller 4 of the system. Specifically, the hot water inlet pipe 11 and the hot water return pipe 21 are both connected to the secondary heat exchanger 12. The primary pipe network water supply pipe 1 and the primary pipe network return pipe 2 form a primary heating circulation pipeline with the secondary heat exchanger 12 through the hot water inlet pipe 11 and the hot water return pipe 21. The secondary heat exchanger 12 and the hot water absorption chiller 4 form a secondary heating circulation pipeline. The hot water in the primary pipe network water supply pipe 1 enters the secondary heat exchanger 12 and heats the water in the secondary heating circulation pipeline. The heated hot water in the secondary heating circulation pipeline enters the hot water absorption chiller 4 as the energy source of the hot water absorption chiller 4. Example 2

[0031] Reference Figure 2, a circulating cold water system constructed by using the primary pipe network of urban heating. This embodiment is basically the same as embodiment 1, except that: a heating device 111 for heating hot water is provided on the hot water inlet pipe 11. The heating device 111 can adopt a high-temperature heat pump, an electric heater, a gas heater, etc. When the hot water temperature in the primary pipe network water supply pipe 1 does not reach the temperature required by the hot water absorption chiller 4, the heating device 111 is used to heat the hot water temperature to the required temperature before entering the hot water absorption chiller 4. Example 3

[0032] Reference Figure 3 , an ice-making system constructed by using a primary pipe network for urban heating, this embodiment is basically the same as embodiment 1, except that: this embodiment does not set a cold water user 6 and a cold water circulation pipeline, the hot water type absorption chiller 4 of this embodiment is connected to the ice-making machine 7 through a refrigerant circulation pipeline, the structure and principle of the ice-making machine 7 are prior art and are not described in detail herein, specifically, a refrigerant outlet pipe 71 and a refrigerant inlet pipe 72 are provided between the hot water type absorption chiller 4 and the ice-making machine 7, a circulating pump 711 for driving the refrigerant circulation is provided on the refrigerant outlet pipe 71, and the refrigerant circulates between the hot water type absorption chiller 4 and the ice-making machine 7 through the refrigerant outlet pipe 71 and the refrigerant inlet pipe 72; the ice-making machine 7 is also connected with an ice-making machine water inlet pipe 73 for water entry and an ice water outlet pipe 74 for ice water discharge.

[0033] Working process: Taking 115℃ hot water to produce 0℃ ice water as an example, 115℃ hot water enters the hot water absorption chiller 4 through the hot water inlet pipe 11. The hot water absorption chiller 4 uses the heat of the hot water as energy to cool down the refrigerant entering the hot water absorption chiller 4 through the refrigerant outlet pipe 71. The temperature of the refrigerant entering the hot water absorption chiller 4 through the refrigerant outlet pipe 71 is -5℃, and it is reduced to -10℃ by the hot water absorption chiller 4. The cooled refrigerant is cooled by The refrigerant inlet pipe 72 enters the ice maker 7, and after passing through the ice maker 7, the refrigerant temperature rises to -5°C, and then enters the hot water type absorption chiller 4 through the refrigerant outlet pipe 71 for cooling and circulation; normal temperature water enters the ice maker 7 through the ice maker inlet pipe 73, is cooled to 0°C in the ice maker 7, and the obtained ice water is discharged through the ice water outlet pipe 74; the hot water temperature after absorbing heat in the hot water type absorption chiller 4 drops to 100°C, and enters the primary pipe network return pipe 2 through the hot water return pipe 21.

[0034] Reference Fig.10A secondary heat exchanger 12 can also be arranged between the primary pipe network water supply pipe 1, the primary pipe network return pipe 2 and the hot water absorption chiller 4 of the system. Specifically, the hot water inlet pipe 11 and the hot water return pipe 21 are both connected to the secondary heat exchanger 12. The primary pipe network water supply pipe 1 and the primary pipe network return pipe 2 form a primary heating circulation pipeline with the secondary heat exchanger 12 through the hot water inlet pipe 11 and the hot water return pipe 21. The secondary heat exchanger 12 and the hot water absorption chiller 4 form a secondary heating circulation pipeline. The hot water in the primary pipe network water supply pipe 1 enters the secondary heat exchanger 12 and heats the water in the secondary heating circulation pipeline. The heated hot water in the secondary heating circulation pipeline enters the hot water absorption chiller 4 as the energy source of the hot water absorption chiller 4. Example 4

[0035] Reference Figure 4 , an ice-making system constructed by using the primary pipe network of urban heating. This embodiment is basically the same as the third embodiment, except that: a heating device 111 for heating the hot water is provided on the hot water inlet pipe 11. The heating device 111 can adopt a high-temperature heat pump, an electric heater, a gas heater, etc. When the hot water temperature in the primary pipe network water supply pipe 1 does not reach the temperature required by the hot water absorption chiller 4, the heating device 111 is used to heat the hot water temperature to the required temperature before entering the hot water absorption chiller 4. Example 5

[0036] Reference Figure 5 A steam making system constructed by using a primary pipe network for urban heating comprises a primary pipe network water supply pipe 1 and a primary pipe network return pipe 2, a hot water inlet pipe 11 is arranged on the primary pipe network water supply pipe 1, a hot water return pipe 21 is arranged on the primary pipe network return pipe 2, the hot water inlet pipe 11 and the hot water return pipe 21 are both connected to a flash tank 8, a heat meter 3 for measuring the heat used is arranged between the hot water inlet pipe 11 and the hot water return pipe 21, a heat exchange device is arranged inside the flash tank 8, water is heated and evaporated to generate steam, and its structure and principle are prior art and will not be described in detail herein. The flash tank 8 is connected to a first tap water pipe 82 for tap water to enter, and a water treatment device 821 for purifying tap water is provided on the first tap water pipe 82. A steam discharge pipe 81 for steam discharge is connected to the top of the flash tank 8, and a water vapor compressor 811 for extracting and compressing steam and a pressure stabilizing tank 812 for stabilizing the steam pressure are provided on the steam discharge pipe 81 in sequence along the steam flow direction. The water vapor compressor 811 extracts the steam generated by the flash tank 8 and compresses it to increase the pressure and temperature, and can also prevent the steam from flowing back.

[0037] Working process: Taking 70-115℃ hot water to produce saturated steam above 100-180℃ as an example, the treated normal temperature tap water enters the flash tank 8 through the first tap water inlet pipe 82, and the 70-115℃ hot water enters the flash tank 8 through the hot water inlet pipe 11. The flash tank 8 uses the heat of the hot water as energy to heat the tap water. After the tap water is heated to a certain temperature, steam is generated and discharged from the steam discharge pipe 81. Under the suction action of the water vapor compressor 811, the flash tank 8 is in a negative pressure, and the tap water will accelerate the generation of steam. The steam is compressed and heated by the water vapor compressor 811 and enters the pressure regulating tank 812 to output saturated steam to the outside. In order to obtain saturated steam above 100-170℃, a multi-stage water vapor compressor 811 can be used; the hot water cooled after passing through the flash tank 8 enters the first-level pipe network return pipe 2 through the hot water return pipe 21.

[0038] Reference Fig.11 A secondary heat exchanger 12 can also be arranged between the primary pipe network water supply pipe 1, the primary pipe network return pipe 2 and the flash tank 8 of the system. Specifically, the hot water inlet pipe 11 and the hot water return pipe 21 are both connected to the secondary heat exchanger 12. The primary pipe network water supply pipe 1 and the primary pipe network return pipe 2 form a primary heating circulation pipeline with the secondary heat exchanger 12 through the hot water inlet pipe 11 and the hot water return pipe 21. The secondary heat exchanger 12 and the flash tank 8 form a secondary heating circulation pipeline. The hot water in the primary pipe network water supply pipe 1 enters the secondary heat exchanger 12 and heats the water in the secondary heating circulation pipeline. The hot water heated in the secondary heating circulation pipeline enters the flash tank 8 as the energy source of the flash tank 8. Example 6

[0039] Reference Figure 6 , a steam making system constructed by using the primary pipe network of urban heating, this embodiment is basically the same as embodiment 5, except that: a heating device 111 for heating the hot water is provided on the hot water inlet pipe 11, and the heating device 111 can adopt a high-temperature heat pump, an electric heater, a gas heater, etc. When the hot water temperature in the primary pipe network water supply pipe 1 does not reach the temperature required by the flash tank 8, the heating device 111 is used to heat the hot water to the required temperature before entering the flash tank 8. Example 7

[0040] Reference Figure 7A hot water making system constructed by using a primary pipe network for urban heating includes a primary pipe network water supply pipe 1 and a primary pipe network return pipe 2. The primary pipe network water supply pipe 1 is provided with a hot water inlet pipe 11, and the primary pipe network return pipe 2 is provided with a hot water return pipe 21. The hot water inlet pipe 11 and the hot water return pipe 21 are both connected to a heat exchanger 9. A heat meter 3 for measuring the heat consumption is provided between the hot water inlet pipe 11 and the hot water return pipe 21. The structure and principle of the heat exchanger 9 are prior art and are not described in detail herein. The heat exchanger 9 is also connected to a second tap water pipe 91 for tap water to enter, and the heat exchanger 9 is connected to a hot water user 10 through a hot water outlet pipe 92.

[0041] Working process: Taking 120℃ hot water to make 80℃ hot water for industrial water and bathing water as an example, normal temperature tap water enters the heat exchanger 9 through the second tap water inlet pipe 91, and 120℃ hot water enters the heat exchanger 9 through the hot water inlet pipe 11. The heat exchanger 9 uses the heat of the hot water as energy to heat the tap water. The tap water exchanges heat with the hot water in the hot water inlet pipe 11 to increase the temperature. After the tap water is heated to 80℃, it is sent to the hot water user 10 through the hot water outlet pipe 92 as industrial water or bathing water; the hot water entering the heat exchanger 9 through the hot water inlet pipe 11 is cooled down and the temperature drops to 85℃, and enters the primary pipe network return pipe 2 through the hot water return pipe 21. Example 8

[0042] Reference Figure 8 , a hot water making system constructed by using the primary pipe network of urban heating, this embodiment is basically the same as embodiment 7, except that: a heating device 111 for heating the hot water is provided on the hot water inlet pipe 11, and the heating device 111 can adopt a high-temperature heat pump, an electric heater, a gas heater, etc. When the hot water temperature in the primary pipe network water supply pipe 1 does not reach the temperature required by the heat exchanger 9, the heating device 111 is used to heat the hot water to the required temperature before entering the heat exchanger 9.

[0043] The utility model utilizes the energy station system constructed by the urban heating primary pipeline network, which can utilize the hot water in the urban heating primary pipeline network as energy to provide users with refrigeration, ice making, steam making, and hot water making needs during the non-heating period, so that the waste heat generated by power plants, thermal power plants, petrochemicals, coking, steel and other industries and the urban heating primary pipeline network can be fully utilized during the non-heating period, avoiding the waste and processing costs caused by the emptying of waste heat from the heat source plant, saving energy and reducing consumption, and reducing the cost of refrigeration, ice making, steam making, and hot water making for users during the non-heating period; the urban heating primary pipeline network and the energy station can be directly connected or connected through a secondary heat exchanger.

Claims

1. An energy station system constructed using a primary pipe network for urban heating, comprising a primary pipe network water supply pipe (1) and a primary pipe network return pipe (2), wherein the primary pipe network water supply pipe (1) is connected to a heat-using device via a hot water inlet pipe (11), and the heat-using device is connected to the primary pipe network return pipe (2) via a hot water return pipe (21), wherein: The heat-using equipment is one of a hot water absorption chiller (4), a flash tank (8) or a heat exchanger (9); When the heat-using equipment is a hot water absorption chiller (4), the hot water absorption chiller (4) is connected to a cooling tower (5) via a cooling circulation pipeline, and the hot water absorption chiller (4) is also connected to a cold water user (6) or an ice maker (7) via a circulation pipeline. When the hot water absorption chiller (4) is connected to a cold water user (6), the hot water absorption chiller (4) and the cold water user (6) are connected via a cold water circulation pipeline; when the hot water absorption chiller (4) is connected to an ice maker (7), the hot water absorption chiller (4) and the ice maker (7) are connected via a refrigerant circulation pipeline, and the ice maker (7) is also connected to an ice maker water inlet pipe (73) and an ice water outlet pipe (74); When the heat-using equipment is a flash tank (8), the flash tank (8) is connected to a first tap water pipe (82), and the top of the flash tank (8) is connected to a steam exhaust pipe (81); When the heat-using device is a heat exchanger (9), the heat exchanger (9) is connected to a second tap water supply pipe (91), and the heat exchanger (9) is connected to a hot water user (10) via a hot water outlet pipe (92).

2. The energy station system constructed by utilizing the primary urban heating network according to claim 1 is characterized in that: A heat meter (3) for measuring the heat consumption of the heat-consuming equipment is provided between the hot water inlet pipe (11) and the hot water return pipe (21).

3. The energy station system constructed by utilizing the primary urban heating network according to claim 1 is characterized in that: The hot water inlet pipe (11) is provided with a heating device (111) for heating the hot water.

4. The energy station system constructed by utilizing the primary urban heating network according to claim 1 is characterized in that: The first tap water pipe (82) is provided with a water processor (821) for purifying tap water.

5. The energy station system constructed by using the primary urban heating network according to claim 1 is characterized in that: The steam discharge pipe (81) is provided with a water vapor compressor (811) for extracting and compressing the steam and a pressure stabilizing tank (812) for stabilizing the steam pressure, which are arranged in sequence along the steam flow direction.

6. The energy station system constructed by utilizing the primary urban heating network according to claim 1 is characterized in that: When the heat-using equipment is a hot water absorption chiller (4) or a flash tank (8), a secondary heat exchanger (12) is further provided between the primary pipe network water supply pipe (1), the primary pipe network water return pipe (2) and the chiller (4) or the flash tank (8); a secondary heat supply circulation pipeline is provided between the secondary heat exchanger (12) and the chiller (4) or the flash tank (8); the hot water inlet pipe (11) and the hot water return pipe (21) are both connected to the secondary heat exchanger (12); the primary pipe network water supply pipe (1), the primary pipe network water return pipe (2) form a primary heat supply circulation pipeline for heating water in the secondary heat supply circulation pipeline through the hot water inlet pipe (11), the hot water return pipe (21) and the secondary heat exchanger (12).

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