A comprehensive heating system

Abstract

The utility model belongs to the field of energy comprehensive utilization technique, disclose a kind of comprehensive heating system, belong to the field of energy comprehensive utilization technique. Including geothermal heating system, expand economizer, heat network heater, combined cycle unit system;Wherein through expand economizer and geothermal heating system collaborative work, utilize waste heat boiler flue gas waste heat and geothermal energy respectively with heat network return water preheating, again through heat network heater, utilize the steam turbine steam preheated heat network water heating to meet the hot water of heat network requirement, supply resident user use. The system not only effectively utilizes combined cycle unit waste heat boiler tail flue gas waste heat and geothermal energy, realizes energy comprehensive efficient utilization. Meanwhile, effectively reduce the steam extraction flow of combined cycle unit steam turbine, improve the output of combined cycle unit, reduce the energy consumption level of combined cycle unit.

Description

Technical Field

[0001] This utility model belongs to the field of comprehensive energy utilization technology, specifically relating to a comprehensive heating and heat supply system. Background Technology

[0002] Most combined cycle generator units use steam turbine extraction for heating to heat the circulating water of the heating network and provide heating for residents. However, the flue gas from the waste heat boiler of the combined cycle generator unit is directly discharged into the atmosphere at a temperature of 80℃~110℃. This part of the waste heat energy of the flue gas is not fully utilized, which seriously reduces the overall thermal efficiency of the plant and affects the economic operation of the combined cycle unit.

[0003] Chinese patent publication number CN109854315A, entitled "A Heating System and its Operation Method for Integrated Steam Extraction in a Gas-Steam Combined Cycle Unit," describes a system comprising a gas turbine unit and a steam turbine unit. The gas turbine unit includes a gas turbine compressor, a gas turbine combustion chamber, a gas turbine turbine itself, and a first generator. The steam turbine unit includes a waste heat boiler, a high-pressure cylinder, an intermediate-pressure cylinder, a low-pressure cylinder, a second generator, a condenser, a condensate pump, a shaft seal heater, a deaerator, a first desuperheating and pressure reducing device, a second desuperheating and pressure reducing device, a third desuperheating and pressure reducing device, power equipment, a heating network heater, a condensate heat exchanger, and a heating network circulation pump. This patent application is based on the principle of energy cascade utilization and integrates different steam extraction methods; however, the structure is complex and it does not utilize geothermal energy. Utility Model Content

[0004] In order to overcome the problems existing in the prior art, the purpose of this utility model is to provide an integrated heating system. By arranging a geothermal heating system in the power plant and an enlarged economizer at the tail end of the waste heat boiler of the combined cycle unit, the waste heat of the flue gas at the tail end of the waste heat boiler and the geothermal energy are used to preheat the return water of the heating network. The heated and mixed hot water then enters the extraction steam heating network heater and is further heated by steam extracted from the steam turbine to meet the hot water requirements of the heating network and supplied to residential users.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A comprehensive heating system includes: a gas turbine, a steam turbine, a waste heat boiler, a heat network return water pipe, and a ground source heat pump. The exhaust outlet of the gas turbine is connected to the waste heat boiler via a pipe. The waste heat boiler has a steam generation system and an expanded economizer. The condenser has a first input end, a second input end, and an output end. The steam turbine has a first exhaust port, a second exhaust port, and an input port. The first exhaust port of the steam turbine is connected to the interior of the heat network heater, and the heat network heater is connected to the second input end of the condenser. The second... The exhaust port is connected to the first input end of the condenser; the output end of the condenser is connected to the steam generation system, and the steam generation system is connected to the input end of the steam turbine; the return water pipe of the heating network is connected to a heating circulation pump, which is connected to an expanded economizer through a first pipe, and the expanded economizer is connected to the heat exchange element inside the heating network heater through an output pipe; a second pipe is connected to the first pipe, which is connected to the heat exchange element inside the ground source heat pump, and the ground source heat pump is connected to the output pipe of the expanded economizer; the ground source heat pump contains a heat transfer medium.

[0006] Optionally, the first generator and the compressor are coaxially connected to the shaft of the gas turbine; the second generator is coaxially connected to the shaft of the steam turbine.

[0007] Optionally, the pretreatment device is a filter.

[0008] Optionally, the ground source heat pump has a bottom input end and a bottom output end; the bottom output end of the ground source heat pump is connected to a plate heat exchanger through a return output pipe, and the plate heat exchanger is connected to the bottom input end of the ground source heat pump through a return input pipe.

[0009] Optionally, a closed-loop circulation pump is installed on the return output pipeline.

[0010] Optionally, the plate heat exchanger has a top inlet and a bottom outlet, and the outlet of the ground source heat pump is connected to the heat exchange element inside the plate heat exchanger via a return outlet pipe.

[0011] Optionally, the bottom output end of the plate heat exchanger is located above the reinjection well, and the top input end of the plate heat exchanger is connected to the production well via a pipeline.

[0012] Optionally, a pretreatment device is installed on the pipeline connecting the plate heat exchanger to the production well.

[0013] Optionally, a submersible pump is installed at the end of the pipe connecting the plate heat exchanger to the production well that extends into the production well.

[0014] Optionally, the heat exchange elements inside the heating network heater are connected to the heating network water supply pipe via pipes.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This utility model provides an integrated heating system. On the one hand, the system utilizes the waste heat of the flue gas at the tail end of the combined cycle unit's waste heat boiler through an expanded economizer, thereby achieving efficient cascade utilization of energy in the combined cycle unit and reducing the energy consumption level of the combined cycle unit.

[0016] Furthermore, this utility model effectively converts geothermal energy into residential heating heat through a ground source heat pump and a plate heat exchanger, achieving efficient utilization of green energy. In addition, by effectively utilizing flue gas waste heat and geothermal energy, the heating area of ​​the combined cycle unit can be expanded without changing the power generation. Attached Figure Description

[0017] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely schematic to aid in understanding the present invention and do not specifically limit the shapes and proportions of the components. In the drawings: Figure 1 This is a schematic diagram of the integrated heating system of this utility model; The system includes: 1. Geothermal heating system; 111. Production well; 112. Submersible pump; 113. Pretreatment device; 114. Plate heat exchanger; 115. Reinjection well; 116. Closed-loop circulation pump; 117. Ground source heat pump; 2. Expanded economizer; 3. Heating circulation pump; 4. Heat network heater; 5. Gas turbine; 6. Combustion chamber; 7. Compressor; 8. First generator; 9. Steam turbine; 10. Second generator; 11. Steam generation system; 12. Waste heat boiler; 13. Condenser; 31. First pipeline; 32. Second pipeline; 1171. Return output pipeline; 1172. Return input pipeline; 30. Heat network return water pipe; 40. Heat network supply water pipe. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0019] Therefore, the following detailed description of embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0020] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0021] When an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments. The use of the term "horizontal" does not imply that the component is required to be absolutely horizontal, but rather that it may be slightly tilted. "Horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it may be slightly tilted.

[0022] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of this utility model, it should be understood that the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or collections thereof.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0024] The present invention will now be described in detail with reference to the accompanying drawings.

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] The present invention will now be described in further detail with reference to the accompanying drawings: This utility model discloses a comprehensive heating and heat supply system, comprising: a gas turbine 5, a steam turbine 9, a waste heat boiler 12, a heat network return water pipe 30, and a ground source heat pump 117. The exhaust outlet of the gas turbine 5 is connected to the waste heat boiler 12 via a pipe. The waste heat boiler 12 has a steam generation system 11 and an expanded economizer 2. The condenser 13 has a first input end, a second input end, and an output end. The steam turbine 9 has a first exhaust port, a second exhaust port, and an input port. The first exhaust port of the steam turbine 9 is connected to the heat network heater 4, and the heat network heater 4 is connected to the second input end of the condenser 13. The second exhaust port of the steam turbine 9... The first input end of the condenser 13 is connected to the condenser 13; the output end of the condenser 13 is connected to the steam generation system 11, and the steam generation system 11 is connected to the input port of the steam turbine 9; the heating network return water pipe 30 is connected to the heating circulation pump 3, the heating circulation pump 3 is connected to the expanded economizer 2 through the first pipe 31, and the expanded economizer 2 is connected to the heat exchange element inside the heating network heater 4 through the output pipe; a second pipe 32 is connected to the first pipe 31, the second pipe 32 is connected to the heat exchange element inside the ground source heat pump 117, and the ground source heat pump 117 is connected to the output pipe of the expanded economizer 2; the ground source heat pump 117 has a closed-loop circulation structure.

[0032] The ground source heat pump 117 contains a heat transfer medium.

[0033] This invention provides a comprehensive heating system. On one hand, the system utilizes the waste heat from the tail-end flue gas of the combined cycle unit's waste heat boiler 12 through an expanded economizer 2, achieving efficient cascaded energy utilization of the combined cycle unit and reducing its energy consumption. On the other hand, the system effectively converts geothermal energy into residential heating heat through a ground source heat pump 117, achieving efficient utilization of green energy. Furthermore, by effectively utilizing the waste heat from the flue gas and geothermal energy, the heating area of ​​the combined cycle unit can be expanded without changing the power generation capacity.

[0034] Example 1 This utility model discloses an integrated heating system, comprising: a geothermal heating system 1, a heat network heater 4, a waste heat boiler 12, a heat network return water pipe 30, a heat network supply water pipe 40, and a combined cycle unit system.

[0035] The combined cycle unit system includes a gas turbine 5, a combustion chamber 6, a compressor 7, a first generator 8, a steam turbine 9, a second generator 10, a condenser 13, and a waste heat boiler 12.

[0036] The waste heat boiler 12 has a steam generation system 11 and an enlarged economizer 2.

[0037] The output shaft of the first generator 8 is coaxially connected to the rotating shaft of the compressor 7 and the rotating shaft of the gas turbine 5.

[0038] The shafts of the steam turbine 9 and the second generator 10 are coaxially connected.

[0039] The exhaust outlet of the gas turbine 5 is connected to the waste heat boiler 12 via a pipeline.

[0040] The flue gas from the gas turbine 5 enters the waste heat boiler 12, and after passing through the steam generation system 11 and the expanded economizer 2 in sequence, it is discharged into the atmosphere.

[0041] The condenser 13 has a first input end, a second input end, and an output end; the steam turbine 9 has a first exhaust port, a second exhaust port, and an input port.

[0042] The first exhaust port of the steam turbine 9 is connected to the inside of the heat network heater 4 through a pipe, and the heat network heater 4 is connected to the second input end of the condenser 13 through a pipe; the second exhaust port of the steam turbine 9 is connected to the first input end of the condenser 13 through a pipe.

[0043] The steam turbine 9, the condenser 13, and the waste heat boiler 2 are connected by pipelines.

[0044] The output end of the condenser 13 is connected to the input end of the steam generation system 11, and the output end of the steam generation system 11 is connected to the input port of the steam turbine 9.

[0045] One stream of steam from the steam turbine 9 is condensed in the condenser 13 and then enters the steam generation system 11. After generating steam, it enters the steam turbine 9, forming a steam-water cycle. The other stream of steam heats the inside of the heating network heater 4 and then enters the condenser 13 for condensation.

[0046] The geothermal heating system 1 includes: a production well 111, a submersible pump 112, a pretreatment device 113, a plate heat exchanger 114, a reinjection well 115, and a ground source heat pump 117.

[0047] The plate heat exchanger 114 has a top inlet and a bottom outlet.

[0048] One end of the submersible pump 112 extends into the production well 111 through a pipe, and the other end is connected to the pretreatment device 113 through a pipe. The other end of the pretreatment device 113 is connected to the top input end of the plate heat exchanger 114 through a pipe. The bottom output end of the plate heat exchanger 114 is located above the reinjection well 115.

[0049] Specifically, the pretreatment device 113 is a filter.

[0050] The return water pipe 30 of the heating network is connected to a heating circulation pump 3 via a pipeline. The heating circulation pump 3 is connected to the input end of the expanded economizer 2 via a first pipeline 31. The output end of the expanded economizer 2 is connected to the heat exchange element inside the heating network heater 4 via an output pipeline. Heating is achieved through the heat exchange element inside the heating network heater 4. The heat exchange element inside the heating network heater 4 is connected to the heating network supply water pipe 40 via a pipeline. Specifically, the heat exchange element inside the heating network heater 4 is a heat exchange tube.

[0051] The first pipe 31 is connected to the second pipe 32.

[0052] The heating circulation pump 3 is connected to the heat exchange element inside the ground source heat pump 117 through the second pipe 32, and the ground source heat pump 117 is connected to the output pipe of the expanded economizer 2 through a pipe.

[0053] The return water from the heating network in the return water pipe 30 passes through the heating circulation pump 3. One path leads to the expanded economizer 2 via the first pipe 31, where it is heated by waste heat from the flue gas. The other path leads to the ground source heat pump 117 in the geothermal heating system 1 via the second pipe 32, where it exchanges heat with the closed-loop circulating water. After being heated by both paths, the water enters the heating network heater 4 and is heated by steam extraction from the steam turbine 9 to hot water that meets the requirements of the heating network, and then supplied to residential users.

[0054] The ground source heat pump 117 has a bottom input end and a bottom output end; the bottom output end of the ground source heat pump 117 is connected to the inside of the plate heat exchanger 114 through the return output pipe 1171, specifically, the plate heat exchanger 114 has a plate assembly inside.

[0055] The plate heat exchanger 114 is connected to the input end of the ground source heat pump 117 at the bottom through the return input pipe 1172; and the closed circulation pump 116 is installed on the return output pipe 1171.

[0056] After the geothermal water is drawn from the production well 111 by the submersible pump 112, it is desanded by the pretreatment device 113 and then enters the plate heat exchanger 114 to exchange heat with the heat medium before being discharged into the reinjection well 115.

[0057] After heat exchange, the heat medium enters the ground source heat pump 117 to heat the return water of the heating network. After heat exchange, the heat medium returns to the plate heat exchanger 114 via the closed-loop circulation pump 116.

[0058] The ground source heat pump 117, plate heat exchanger 114, and closed-loop circulation pump 116 form a closed-loop interconnection structure through the return output pipe 1171 and the return input pipe 1172.

[0059] Water is used as the heat transfer medium in the geothermal heating system 1.

[0060] The above description also applies to coaxial combined cycle units.

[0061] Example 2 In this embodiment, a comprehensive heating system is provided. The gas turbine 5 and the steam turbine 9 are gas-steam combined cycle units in a Mitsubishi M701F gas-steam combined cycle generator set in northern China. The units are manufactured by Mitsubishi Heavy Industries of Japan and are model 1X1M701F.

[0062] Among them, the gas turbine type 5 is a single-shaft, heavy-duty (industrial) type, model M701F, with a rated power of 270,300kW; the steam turbine type 9 is TC2F-35.4, with a rated output of 138,480kW. The waste heat boiler model is DG287 / 10.67 / 38.2 / 3.73 / 48.2 / 0.49-M102. It is a horizontal, natural circulation, three-pressure, non-supplementary combustion, open-air arrangement (with a small enclosed room on the furnace top), manufactured by Dongfang Hitachi Boiler Co., Ltd.

[0063] Currently, the unit provides a regional heat load of approximately 147MW, covering a heating area of ​​approximately 2.6 million square meters. The circulating water volume of the heating network is 2255t / h, the supply water temperature is 90℃, and the return water temperature is 55℃.

[0064] In this embodiment, the heat exchange power of the expanded economizer is 11.48MW. The expanded economizer is a finned economizer, and the material is generally stainless steel.

[0065] In this embodiment, the heat exchange power of the geothermal heating system 1 is 2.22MW, wherein the plate heat exchanger 114 is a deep corrugated plate heat exchanger made of stainless steel 304.

[0066] In this embodiment, the rated power of the ground source heat pump 1 is 3800kW.

[0067] After the heating system is adopted, the return water of the heating network with a capacity of 2150t / h and a return water temperature of 55℃ enters the expanded economizer for heat exchange, and the temperature is raised to 59.6℃. The flue gas temperature at the tail end of the waste heat boiler drops from 94.2℃ to 78.9℃. The return water of the heating network with a capacity of 416.5t / h and a return water temperature of 55℃ enters the geothermal heating system for heat exchange, and the temperature is raised to 59.6℃. After mixing with the heating network water at the outlet of the expanded economizer 2, it enters the heating network heater and is heated to 90℃ by steam extraction before entering the heating network water supply pipeline.

[0068] Unless otherwise specified, the equipment components involved in the above embodiments are all conventional equipment components, and the structural settings, working methods or control methods involved are all conventional settings, working methods or control methods in the art unless otherwise specified.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

[0070] Many embodiments and applications beyond the examples provided will be apparent to those skilled in the art upon reading the foregoing description. Therefore, the scope of this teaching should not be determined by reference to the foregoing description, but rather by reference to the foregoing claims and the full scope of their equivalents. For purposes of completeness, all articles and references, including patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended as a waiver of that subject matter, nor should it be construed as an indication that the applicant has not considered that subject matter as part of the disclosed utility model subject matter.

[0071] The above content provides a further detailed description of this utility model. It should not be considered that the specific embodiments of this utility model are limited to this. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of this utility model, and all such deductions or substitutions should be considered to fall within the scope of protection of this utility model as defined by the submitted claims.

Claims

1. A comprehensive heating and heat supply system, characterized in that, include: The gas turbine (5), steam turbine (9), waste heat boiler (12), heat network return water pipe (30), and ground source heat pump (117) are provided. The exhaust outlet of the gas turbine (5) is connected to the waste heat boiler (12) through a pipe. The waste heat boiler (12) has a steam generation system (11) and an expanded economizer (2). The condenser (13) has a first input end, a second input end, and an output end. The steam turbine (9) has a first exhaust port, a second exhaust port, and an input port. The first exhaust port of the steam turbine (9) is connected to the heat network heater (4), and the heat network heater (4) is connected to the second input end of the condenser (13). The second exhaust port of the steam turbine (9) is connected to the first input port of the condenser (13). An input terminal is connected; the output terminal of the condenser (13) is connected to the steam generation system (11), and the steam generation system (11) is connected to the input port of the steam turbine (9); the heat network return water pipe (30) is connected to the heating circulation pump (3), the heating circulation pump (3) is connected to the expanded economizer (2) through the first pipe (31), and the expanded economizer (2) is connected to the heat exchange element inside the heat network heater (4) through the output pipe; a second pipe (32) is connected to the first pipe (31), the second pipe (32) is connected to the heat exchange element inside the ground source heat pump (117), and the ground source heat pump (117) is connected to the output pipe of the expanded economizer (2); the ground source heat pump (117) contains a heat transfer medium.

2. The integrated heating system according to claim 1, characterized in that, The first generator (8) and the compressor (7) are coaxially connected to the shaft of the gas turbine (5); the second generator (10) is coaxially connected to the shaft of the steam turbine (9).

3. The integrated heating system according to claim 1, characterized in that, The pretreatment device (113) is a filter.

4. The integrated heating system according to claim 1, characterized in that, The ground source heat pump (117) has a bottom input end and a bottom output end; the bottom output end of the ground source heat pump (117) is connected to a plate heat exchanger (114) through a return output pipe (1171), and the plate heat exchanger (114) is connected to the bottom input end of the ground source heat pump (117) through a return input pipe (1172).

5. The integrated heating system according to claim 4, characterized in that, A closed-loop circulation pump (116) is installed on the return output pipe (1171).

6. The integrated heating system according to claim 4, characterized in that, The plate heat exchanger (114) has a top inlet and a bottom outlet. The outlet of the ground source heat pump (117) is connected to the heat exchange element inside the plate heat exchanger (114) through a return outlet pipe (1171).

7. A comprehensive heating system according to claim 6, characterized in that, The bottom output end of the plate heat exchanger (114) is located above the reinjection well (115), and the top input end of the plate heat exchanger (114) is connected to the production well (111) through a pipe.

8. The integrated heating system according to claim 1, characterized in that, A pretreatment device (113) is installed on the pipeline connecting the plate heat exchanger (114) and the production well (111).

9. A comprehensive heating system according to claim 1, characterized in that, A submersible pump (112) is installed at the end of the pipe connecting the plate heat exchanger (114) and the production well (111) that extends into the production well (111).

10. A comprehensive heating system according to claim 1, characterized in that, The heat exchange element inside the heat network heater (4) is connected to the heat network water supply pipe (40) through a pipe.

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