An all-electric driven heating system with external heat source

Abstract

The application provides an all-electric driven heat supply system with an external heat source, and belongs to the field of heat pumps. In order to solve the problems of insufficient starting and peak regulation energy, lack of unified gradient energy bus structure, limited dynamic efficiency and operation stability, and energy waste of the multi-temperature-zone heat supply system, the application adopts gradient-distributed high-temperature thermal bus, medium-temperature thermal bus, normal-temperature thermal bus and cooling water circulation bus, which can be used as a starting heat source of the heat pump process heat supply device, and after the starting is completed, the internal heat pump equipment is driven to realize self-circulation heat supply operation, and can directly supply heat to the process end to meet the heat demand of different types of process ends, relying on the temperature rise of the three-level heat pump, a large amount of low-grade waste heat is converted into usable heat energy and recycled in the system; or realize the cross-stage or single-stage discharge of the process tail end heat and the multi-stage energy quality improvement of the heat pump, and take the medium-deep geothermal energy as the energy core, the excess heat is discharged through the cooling tower to ensure the stability and efficiency of the supply.

Description

Technical Field

[0001] This invention relates to the field of heat pump technology, and more specifically, to a fully electric driven heating system with an external heat source. Background Technology

[0002] With the increasing demand for multi-temperature zone heating in industrial production, heat pump technology has been widely applied to process circulation heating due to its energy-saving and environmentally friendly advantages. However, existing multi-temperature zone heating systems generally suffer from problems such as insufficient start-up heat sources, ineffective cascade utilization of process waste heat, and insufficient system operational stability. High-temperature, medium-temperature, and normal-temperature process zones are mostly heated by independent heat sources, lacking a unified cascade energy bus structure, which makes it difficult to recover and utilize waste heat across stages, resulting in the direct emission of a large amount of low-temperature waste heat and causing serious energy waste. In addition, traditional systems lack stable basic heat source support, limiting start-up efficiency and operational stability.

[0003] To address the aforementioned issues, this invention utilizes renewable energy sources, such as deep geothermal energy, as the fundamental heat source for the thermal busbar, ensuring a stable heat supply during system startup and providing peak-shaving and emergency heat sources during load fluctuations or when external energy is insufficient, thereby improving system stability. By constructing a four-stage cascade thermal busbar and combining it with single- or double-stage electric-driven heat pumps, energy quality is progressively enhanced between busbars, promoting cross-stage recovery and recycling of waste heat from multi-temperature zones, effectively reducing waste heat emissions and improving the overall energy efficiency of the system. Simultaneously, a dual-process heating mode is designed, allowing the thermal busbar to serve as a heat source for heat pump startup, ensuring smooth startup and self-circulation operation, and also to directly supply heat to the process end, meeting the diverse needs of different process loads and improving the system's operational flexibility and applicability. This invention reduces high-grade energy consumption and achieves the goal of green and efficient energy supply for complex multi-temperature zone heating in industrial applications. Summary of the Invention

[0004] The technical problem to be solved by this invention is:

[0005] To address the problems of insufficient start-up and peak-shaving energy, lack of a unified cascade energy bus structure, limited dynamic efficiency and operational stability, and energy waste in existing multi-temperature zone heating systems.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0007] This invention provides a fully electrically driven heating system with an external heat source, comprising a first heat pump process heating device, a second heat pump process heating device, a third heat pump process heating device, a first process heat exchanger, a second process heat exchanger, a third process heat exchanger, a first heat pump heat exchanger, a second heat pump heat exchanger, a third heat pump heat exchanger, a cooling tower, a buried pipe, a low-level heat source heat exchanger, a first regulating valve, a second regulating valve, a third regulating valve, a fourth regulating valve, a fifth regulating valve, a sixth regulating valve, a first circulating pump, a second circulating pump, a third circulating pump, a fourth circulating pump, a fifth circulating pump, a first high-temperature thermal pipeline, a first medium-temperature thermal pipeline, a first normal-temperature thermal pipeline, and a first cooling water circulation pipeline.

[0008] The outlet of the first high-temperature heat pipe merges with the heating outlet of the low-level heat source heat exchanger. The merged pipe then connects sequentially to the high-level inlet of the first heat pump process heating unit and the high-temperature side inlet of the first process heat exchanger. This connected pipe then merges with the high-level outlet of the first heat pump heat exchanger. A first circulation pump is installed on this merged pipe. One branch of this merged pipe connects to the high-level inlet of the first heat pump heat exchanger. Another branch of this merged pipe connects sequentially to the high-temperature side inlet of the first process heat exchanger and the high-level outlet of the first heat pump process heating unit. Finally, one branch of this merged pipe connects to the regenerative inlet of the low-level heat source heat exchanger. Another branch of this merged pipe connects to the inlet of the first high-temperature heat pipe. The heat extraction outlet of the low-level heat source heat exchanger connects to the inlet of the buried pipe, and a fifth circulation pump is installed on this connected pipe. The outlet of the buried pipe connects to the heat extraction inlet of the low-level heat source heat exchanger.

[0009] The outlet end of the first medium-temperature heating pipeline is connected to the high-level inlet end of the second heat pump process heating device, the high-level inlet end of the second process heat exchanger, and the low-level inlet end of the first heat pump heat exchanger, respectively. The connected pipeline merges with the high-level inlet end of the second heat pump heat exchanger. A second circulation pump is installed on the merged pipeline. One branch of the merged pipeline is connected to the high-level inlet end of the second heat pump heat exchanger. The other branch of the merged pipeline merges sequentially with the low-level outlet end of the first heat pump heat exchanger, the high-level outlet end of the second process heat exchanger, and the high-level outlet end of the second heat pump process heating device before connecting to the inlet end of the first medium-temperature heating pipeline.

[0010] The outlet of the first ambient temperature heating pipeline is connected to the high-level inlet of the third heat pump process heating unit, the high-level inlet of the third process heat exchanger, and the low-level inlet of the second heat pump heat exchanger. The connected pipeline merges with the outlet of the third heat pump heat exchanger. A third circulation pump is installed on the merged pipeline. One branch of the merged pipeline is connected to the inlet of the third heat pump heat exchanger. The other branch of the merged pipeline merges sequentially with the low-level outlet of the second heat pump heat exchanger, the high-level outlet of the third process heat exchanger, and the high-level outlet of the third heat pump process heating unit before connecting to the inlet of the first ambient temperature heating pipeline.

[0011] The outlet end of the first cooling water circulation pipeline is sequentially connected to the low-level outlet end of the first heat pump process heating device, the low-level outlet end of the second heat pump process heating device, the low-level outlet end of the third heat pump process heating device, the wastewater outlet end of the first process heat exchanger, the wastewater outlet end of the second process heat exchanger, and the wastewater outlet end of the third process heat exchanger. The pipeline after the connection is sequentially connected to the low-level inlet end of the third heat pump heat exchanger and the inlet end of the cooling tower. The connected pipeline is connected to the outlet end of the cooling tower. A fourth circulation pump is installed on the pipeline after the second connection. The pipeline after the second connection is connected to the low-level outlet end of the third heat pump heat exchanger. Finally, the pipeline after the connection is sequentially connected to the wastewater inlet end of the third process heat exchanger, the wastewater inlet end of the second process heat exchanger, the wastewater inlet end of the first process heat exchanger, the low-level inlet end of the third heat pump process heating device, the low-level inlet end of the second heat pump process heating device, and the low-level inlet end of the first heat pump process heating device. The connected pipeline is connected to the inlet end of the first cooling water circulation pipeline.

[0012] Furthermore, the first, second, and third heat pump process heating devices all include a process heat exchanger, a heat pump heat exchanger, a first high-temperature side regulating valve, a second low-temperature side regulating valve, a high-temperature side circulating pump, and a low-temperature side circulating pump.

[0013] One branch of the high-temperature side outlet of the process heat exchanger is connected to the high-temperature side return water pipeline. The other branch of the high-temperature side outlet of the process heat exchanger is connected in sequence to the first high-temperature side regulating valve, the high-temperature side circulating pump and the high-level inlet of the heat pump heat exchanger to form a high-temperature side water supply circulation. The high-temperature side water supply pipeline is connected to the pipeline connecting the high-level outlet of the heat pump heat exchanger and the high-temperature side inlet of the process heat exchanger.

[0014] One branch of the low-temperature side inlet of the process heat exchanger is connected to the low-temperature side return water pipeline. The other branch of the low-temperature side inlet of the process heat exchanger is connected in sequence to the second low-temperature side regulating valve, the low-position inlet of the heat pump heat exchanger and the low-temperature side circulating pump to form a low-temperature side water supply circulation. The low-temperature side water supply pipeline is connected to the pipeline that connects the low-temperature side outlet of the process heat exchanger and the low-position inlet of the heat pump heat exchanger.

[0015] Furthermore, it also includes a second high-temperature side regulating valve, a first low-temperature side regulating valve, and a third low-temperature side regulating valve. The second high-temperature side regulating valve is installed on the pipeline where the high-temperature side water supply pipeline is connected to the high-temperature side water supply circulation pipeline; the first low-temperature side regulating valve is installed on the pipeline where the low-temperature side water supply circulation is connected to the low-temperature side water supply pipeline; and the third low-temperature side regulating valve is installed on the pipeline where the low-temperature side return water pipeline is connected to the low-temperature side water supply circulation pipeline.

[0016] Furthermore, a first regulating valve is provided on the pipeline connected to the high-temperature side inlet of the first process heat exchanger, a second regulating valve is provided on the pipeline connected to the low-temperature side inlet of the first process heat exchanger, a third regulating valve is provided on the pipeline connected to the high-temperature side inlet of the second process heat exchanger, a fourth regulating valve is provided on the pipeline connected to the low-temperature side inlet of the second process heat exchanger, a fifth regulating valve is provided on the pipeline connected to the high-temperature side inlet of the third process heat exchanger, and a sixth regulating valve is provided on the pipeline connected to the low-temperature side inlet of the third process heat exchanger.

[0017] A fully electrically driven heating system with an external heat source further includes: a first heat pump process heating device, a second heat pump process heating device, a third heat pump process heating device, a first process heat exchanger, a second process heat exchanger, a third process heat exchanger, a fourth process heat exchanger, a fifth process heat exchanger, a sixth process heat exchanger, a seventh process heat exchanger, a first heat pump heat exchanger, a second heat pump heat exchanger, a third heat pump heat exchanger, a fourth heat pump heat exchanger, a fifth heat pump heat exchanger, a cooling tower, a buried pipe, a low-level heat source heat exchanger, a first regulating valve, a second regulating valve, a third regulating valve, a fourth regulating valve, a fifth regulating valve, a sixth regulating valve, a seventh regulating valve, an eighth regulating valve, a ninth regulating valve, a tenth regulating valve, an eleventh regulating valve, a twelfth regulating valve, a thirteenth regulating valve, a fourteenth regulating valve, a first circulating pump, a second circulating pump, a third circulating pump, a fourth circulating pump, a fifth circulating pump, a first medium-temperature heating pipeline, a first normal-temperature heating pipeline, and a first cooling water circulating pipeline.

[0018] The outlet end of the first high-temperature heat pipe merges with the heating outlet end of the low-level heat source heat exchanger and then sequentially connects to the high-level inlet end of the first heat pump process heating unit, the high-temperature side inlet end of the first process heat exchanger, the high-temperature side inlet end of the fifth process heat exchanger, and the high-temperature side inlet end of the seventh process heat exchanger. The connected pipe then sequentially merges with the high-level outlet ends of the first and fifth heat pump heat exchangers. A first circulation pump is installed on the pipe after this second merging. The pipe after this second merging then connects to the high-level inlet ends of the fifth and first heat pump heat exchangers, respectively. The connecting pipelines sequentially merge with the high-temperature outlet of the seventh process heat exchanger, the high-temperature outlet of the fifth process heat exchanger, the high-temperature outlet of the first process heat exchanger, and the high-level outlet of the first heat pump process heating unit. Finally, one branch of the merged pipeline connects to the regenerative inlet of the low-level heat source heat exchanger, and the other branch of the merged pipeline connects to the inlet of the first high-temperature thermal pipeline. The heat extraction outlet of the low-level heat source heat exchanger connects to the inlet of the buried pipe, and a fifth circulating pump is installed on this connected pipeline. The outlet of the buried pipe connects to the heat extraction inlet of the low-level heat source heat exchanger.

[0019] The outlet of the first intermediate-temperature heating pipeline is connected to the high-level inlet of the second heat pump process heating unit, the high-temperature inlet of the second process heat exchanger, the high-temperature inlet of the fourth process heat exchanger, and the high-temperature inlet of the sixth process heat exchanger, respectively. The connected pipeline merges with the low-temperature outlet of the seventh process heat exchanger. One branch of this merged pipeline connects to the low-level inlet of the first heat pump heat exchanger, and the other branch connects sequentially to the high-level outlet of the second and fourth heat pump heat exchangers. The pipelines merge at both ends, and a second circulation pump is installed on the merged pipeline. The merged pipeline then connects to the high-level inlet of the fourth heat pump heat exchanger, the high-level inlet of the second heat pump heat exchanger, and the low-temperature inlet of the seventh process heat exchanger. The connected pipelines then sequentially merge with the high-temperature outlet of the sixth process heat exchanger, the high-temperature outlet of the fourth process heat exchanger, the high-temperature outlet of the second process heat exchanger, and the high-level outlet of the second heat pump process heating unit. Finally, the merged pipeline connects to the inlet of the first medium-temperature thermal pipeline.

[0020] The outlet of the first ambient temperature heating pipe is connected to the high-temperature inlet of the third heat pump process heating unit and the high-temperature inlet of the third process heat exchanger, respectively. The connected pipe then merges sequentially with the low-temperature outlet of the fifth and sixth process heat exchangers. One branch of this merged pipe connects to the low-level inlet of the second heat pump heat exchanger, and another branch connects to the high-level outlet of the third heat pump heat exchanger. The merged pipe then connects to the low-level inlet of the fifth heat pump heat exchanger. A third circulation circuit is installed on the connected pipe. The pump, after connection, connects to the low-level outlet of the fifth heat pump heat exchanger. A branch of this connecting pipeline connects to the high-level inlet of the third heat pump heat exchanger. Another branch of this connecting pipeline connects to the low-level outlet of the second heat pump heat exchanger and then connects to the low-temperature inlet of both the sixth and fifth process heat exchangers. This connecting pipeline then connects to the high-temperature outlet of the third process heat exchanger and the high-temperature outlet of the third heat pump process heating unit. Finally, this connecting pipeline connects to the inlet of the first ambient temperature heating pipeline.

[0021] The outlet of the first cooling water circulation pipeline connects sequentially to the low-temperature side outlets of the first, second, and third heat pump heating units, as well as the low-temperature side outlets of the first, second, third, and fourth process heat exchangers. The merged pipeline then connects to the low-level inlet of the third and fourth heat pump heat exchangers, and the inlet of the cooling tower. A fourth circulation pump is installed on the connected pipeline. The connecting pipelines are sequentially connected to the outlet end of the cooling tower, the low-level outlet end of the fourth heat pump heat exchanger, and the low-level outlet end of the third heat pump heat exchanger. The connecting pipelines are then connected to the low-temperature side inlet end of the fourth process heat exchanger, the low-temperature side inlet end of the third process heat exchanger, the low-temperature side inlet end of the second process heat exchanger, the low-temperature side inlet end of the first process heat exchanger, the low-temperature side inlet end of the third heat pump process heating device, the low-temperature side inlet end of the second heat pump process heating device, and the low-temperature side inlet end of the first heat pump process heating device. The connecting pipelines are then connected to the inlet end of the first cooling water circulation pipeline.

[0022] Furthermore, the first, second, and third heat pump process heating devices all include a process heat exchanger, a heat pump heat exchanger, a first high-temperature side regulating valve, a second low-temperature side regulating valve, a high-temperature side circulating pump, and a low-temperature side circulating pump.

[0023] One branch of the high-temperature side outlet of the process heat exchanger is connected to the high-temperature side return water pipeline. The other branch of the high-temperature side outlet of the process heat exchanger is connected in sequence to the first high-temperature side regulating valve, the high-temperature side circulating pump and the high-level inlet of the heat pump heat exchanger to form a high-temperature side water supply circulation. The high-temperature side water supply pipeline is connected to the pipeline connecting the high-level outlet of the heat pump heat exchanger and the high-temperature side inlet of the process heat exchanger.

[0024] One branch of the low-temperature side inlet of the process heat exchanger is connected to the low-temperature side return water pipeline. The other branch of the low-temperature side inlet of the process heat exchanger is connected in sequence to the second low-temperature side regulating valve, the low-position inlet of the heat pump heat exchanger and the low-temperature side circulating pump to form a low-temperature side water supply circulation. The low-temperature side water supply pipeline is connected to the pipeline that connects the low-temperature side outlet of the process heat exchanger and the low-position inlet of the heat pump heat exchanger.

[0025] Furthermore, it also includes a second high-temperature side regulating valve, a first low-temperature side regulating valve, and a third low-temperature side regulating valve. The second high-temperature side regulating valve is installed on the pipeline where the high-temperature side water supply pipeline is connected to the high-temperature side water supply circulation pipeline; the first low-temperature side regulating valve is installed on the pipeline where the low-temperature side water supply circulation is connected to the low-temperature side water supply pipeline; and the third low-temperature side regulating valve is installed on the pipeline where the low-temperature side return water pipeline is connected to the low-temperature side water supply circulation pipeline.

[0026] Furthermore, a first regulating valve is installed on the pipe connected to the high-temperature inlet of the first process heat exchanger; a second regulating valve is installed on the pipe connected to the low-temperature inlet of the first process heat exchanger; a third regulating valve is installed on the pipe connected to the high-temperature inlet of the second process heat exchanger; a fourth regulating valve is installed on the pipe connected to the low-temperature inlet of the second process heat exchanger; a fifth regulating valve is installed on the pipe connected to the high-temperature inlet of the third process heat exchanger; a sixth regulating valve is installed on the pipe connected to the low-temperature inlet of the third process heat exchanger; and a seventh regulating valve is installed on the pipe connected to the high-temperature inlet of the fourth process heat exchanger. An eighth regulating valve is installed on the pipe connected to the low-temperature side inlet of the fourth process heat exchanger; a ninth regulating valve is installed on the pipe connected to the high-temperature side inlet of the fifth process heat exchanger; a tenth regulating valve is installed on the pipe connected to the low-temperature side inlet of the fifth process heat exchanger; an eleventh regulating valve is installed on the pipe connected to the high-temperature side inlet of the sixth process heat exchanger; a twelfth regulating valve is installed on the pipe connected to the low-temperature side inlet of the sixth process heat exchanger; a thirteenth regulating valve is installed on the pipe connected to the high-temperature side inlet of the seventh process heat exchanger; and a fourteenth regulating valve is installed on the pipe connected to the low-temperature side inlet of the seventh process heat exchanger.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] (1) This invention uses renewable energy, represented by deep geothermal energy, as the external basic heat source of the high-temperature thermal bus. After the geothermal energy is upgraded by a low-level heat source heat exchanger, it is supplied to the system. It can provide a continuous and stable start-up heat source during the start-up phase of the multi-temperature zone heating system. In the event of load fluctuation (unstable energy output of the bus) or external energy shortage, it can be used as a peak-shaving or emergency heat source, thereby significantly improving the stability of system operation and energy self-sufficiency.

[0029] (2) The cascade thermal busbar of the present invention can serve as the starting heat source for the heat pump process heating device, driving the internal heat pump equipment to achieve self-circulating heating operation after startup; it can also directly supply heat to the process end to meet the heating needs of different types of process ends. This dual-mode operation effectively improves the system's adaptability to multiple types of industrial processes and operational flexibility, and expands its application scope.

[0030] (3) The four-stage thermal busbars of high temperature, medium temperature, normal temperature and cooling water constructed in this invention are arranged in sequence, which can achieve water supply and return effects of 95℃ / 90℃, 80℃ / 70℃, 60℃ / 50℃ and 40℃ / 35℃ respectively. The energy quality is improved between adjacent busbars and the next adjacent busbars through single-stage or double-stage heat pumps, so that the process waste heat in different temperature ranges can be recovered and reused across stages. The waste heat at the end of the process can be directly discharged to the cooling water circulation busbar, or discharged into the low-level busbar across single-stage or double-stage busbars, realizing efficient cascade recovery and recycling of waste heat, and significantly improving the overall energy efficiency of the system.

[0031] (4) During the operation of the system, the external input is mainly heat pump driven electric energy, the basic heat is provided by geothermal energy, and the waste heat is recycled and reused through the cascade recovery of each level of busbars. This reduces the use of high-grade primary energy such as boiler steam and gas, reduces system operating costs, and significantly reduces carbon emissions, thus having good energy-saving and emission-reduction effects and environmental benefits. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of the heat pump process heating device in an embodiment of the present invention;

[0033] Figure 2 This invention provides a structure of a fully electrically driven heating system with an external heat source, as described in an embodiment of the present invention. Figure 1 ;

[0034] Figure 3 This invention provides a structure of a fully electrically driven heating system with an external heat source, as described in an embodiment of the present invention. Figure 2 .

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. First heat pump process heating device; 1-1. Process heat exchanger; 1-2. Heat pump heat exchanger; 1-11. First high-temperature side regulating valve; 1-12. Second high-temperature side regulating valve; 1-13. First low-temperature side regulating valve; 1-14. Second low-temperature side regulating valve; 1-15. Third low-temperature side regulating valve; 1-16. High-temperature side circulating pump; 1-17. Low-temperature side circulating pump; 1-21. First start-up heat source pipeline; 1-22. First high-temperature water pipeline; 1-23. Second high-temperature water pipeline; 1-24. Second start-up heat source pipeline; 1-25. Third high-temperature water pipeline; 1-26. Fourth high-temperature water pipeline; 1-31. First exhaust cooling pipeline; 1-32. First low-temperature water pipeline; 1-33. Second low-temperature water pipeline; 1-34. Second row of hot cooling pipes; 1-35. Third low-temperature water pipes; 1-36. Fourth low-temperature water pipes; 2. Second heat pump process heating unit; 3. Third heat pump process heating unit; 4. First process heat exchanger; 5. Second process heat exchanger; 6. Third process heat exchanger; 7. Fourth process heat exchanger; 8. Fifth process heat exchanger; 9. Sixth process heat exchanger; 10. Seventh process heat exchanger; 11. First heat pump heat exchanger; 12. Second heat pump heat exchanger; 13. Third heat pump heat exchanger; 14. Fourth heat pump heat exchanger; 15. Fifth heat pump heat exchanger; 16. Cooling tower; 17. Buried pipe; 18. Low-level heat source heat exchanger; 21. First regulating valve; 22. Second regulating valve; 23. Third regulating valve; 24. Fourth regulating valve; 25, Fifth regulating valve; 26, Sixth regulating valve; 27, Seventh regulating valve; 28, Eighth regulating valve; 29, Ninth regulating valve; 30, Tenth regulating valve; 31, Eleventh regulating valve; 32, Twelfth regulating valve; 33, Thirteenth regulating valve; 34, Fourteenth regulating valve; 35, First circulating pump; 36, Second circulating pump; 37, Third circulating pump; 38, Fourth circulating pump; 39, Fifth circulating pump; 41, First high-temperature heating pipeline; 42, Second high-temperature heating pipeline; 43, Third high-temperature heating pipeline; 44, Fourth high-temperature heating pipeline; 45, Fifth high-temperature heating pipeline; 45-1, Fifth high-temperature heating pipeline one; 45-2, Fifth high-temperature heating pipeline two; 45-3, Fifth high-temperature heating pipeline... Route 3; 45-4, Fifth High-Temperature Heating Pipeline 4; 46, Sixth High-Temperature Heating Pipeline; 47, Seventh High-Temperature Heating Pipeline; 48, Eighth High-Temperature Heating Pipeline; 49, Ninth High-Temperature Heating Pipeline; 50, Tenth High-Temperature Heating Pipeline; 51, Eleventh High-Temperature Heating Pipeline; 52, Twelfth High-Temperature Heating Pipeline; 53, Thirteenth High-Temperature Heating Pipeline; 54, Fourteenth High-Temperature Heating Pipeline; 55, Ground Source Heating Pipeline; 56, Ground Source Regeneration Heating Pipeline; 57, Ground Source Water Supply Pipeline; 58, Ground Source Return Water Pipeline; 61, First Medium-Temperature Heating Pipeline; 62, Second Medium-Temperature Heating Pipeline; 63, Third Medium-Temperature Heating Pipeline; 64, Fourth Medium-Temperature Heating Pipeline; 64-1, Fourth Medium-Temperature Heating Pipeline 1; 64-2, Fourth Medium-Temperature Heating Pipeline 2;64-3, Fourth Medium-Temperature Heating Pipeline III; 64-4, Fourth Medium-Temperature Heating Pipeline IV; 65, Fifth Medium-Temperature Heating Pipeline; 66, Sixth Medium-Temperature Heating Pipeline; 67, Seventh Medium-Temperature Heating Pipeline; 68, Eighth Medium-Temperature Heating Pipeline; 69, Ninth Medium-Temperature Heating Pipeline; 70, Tenth Medium-Temperature Heating Pipeline; 71, Eleventh Medium-Temperature Heating Pipeline; 72, Twelfth Medium-Temperature Heating Pipeline; 73, Thirteenth Medium-Temperature Heating Pipeline; 74, Fourteenth Medium-Temperature Heating Pipeline; 75, Fifteenth Medium-Temperature Heating Pipeline; 76, Sixteenth Medium-Temperature Heating Pipeline; 81, First Ambient Temperature Heating Pipeline; 82, Second Ambient Temperature Heating Pipeline; 83, Third Ambient Temperature Heating Pipeline; 84, Fourth Ambient Temperature Heating Pipeline; 84-1, Fourth Ambient Temperature Heating Pipeline I; 84-2, ... Four ambient temperature heating pipes, Part 2; 84-3, Part 3; 84-4, Part 4; 84-5, Part 5; 85, Part 5; 86, Part 6; 87, Part 7; 88, Part 8; 89, Part 9; 90, Part 10; 91, Part 11; 92, Part 12; 93, Part 13; 94, Part 14; 101, Part 1 cooling water circulation pipe; 102, Part 2 cooling water circulation pipe; 103, Part 3 cooling water circulation pipe; 104, Part 4 cooling water circulation pipe; 105, Part 5 cooling water circulation pipe; 10 6. Sixth Cooling Water Circulation Pipeline; 107. Seventh Cooling Water Circulation Pipeline; 108. Eighth Cooling Water Circulation Pipeline; 108-1. Eighth Cooling Water Circulation Pipeline 1; 108-2. Eighth Cooling Water Circulation Pipeline 2; 108-3. Eighth Cooling Water Circulation Pipeline 3; 108-4. Eighth Cooling Water Circulation Pipeline 4; 108-5. Eighth Cooling Water Circulation Pipeline 5; 108-6. Eighth Cooling Water Circulation Pipeline 6; 109. Ninth Cooling Water Circulation Pipeline; 110. Tenth Cooling Water Circulation Pipeline; 111. Eleventh Cooling Water Circulation Pipeline; 112. Twelfth Cooling Water Circulation Pipeline; 113. Thirteenth Cooling Water Circulation Pipeline; 114. Fourteenth Cooling Water Circulation Pipeline; 115. Fifteenth Cooling Water Circulation Pipeline; 116. Sixteen cooling water circulation pipelines; 121. First cooling water pipeline; 122. Second cooling water pipeline; 123. Twenty-first cooling water circulation pipeline; 124. Twenty-second cooling water circulation pipeline; 125. Twenty-third cooling water circulation pipeline; 126. Twenty-fourth cooling water circulation pipeline; 127. Twenty-fifth cooling water circulation pipeline; 128. Twenty-sixth cooling water circulation pipeline; 129. Twenty-seventh cooling water circulation pipeline; 131. First process heat pipe; 132. Second process heat pipe; 133. Third process heat pipe; 134. Fourth process heat pipe; 135. Fifth process heat pipe; 136. Sixth process heat pipe; 137. Seventh process heat pipe; 138. Eighth process heat pipe;139. Process 9 heat pipe; 140. Process 10 heat pipe; 141. Process 11 heat pipe; 142. Process 12 heat pipe; 143. Process 13 heat pipe; 144. Process 14 heat pipe; 151. First waste heat discharge pipe; 152. Second waste heat discharge pipe; 153. Third waste heat discharge pipe; 154. Fourth waste heat discharge pipe; 155. Fifth waste heat discharge pipe; 156. Sixth waste heat discharge pipe; 157. Seventh waste heat discharge pipe; 158. Eighth waste heat discharge pipe; 159. Ninth waste heat discharge pipe; 160. Tenth waste heat discharge pipe; 161. Eleventh waste heat discharge pipe; 162. Twelfth waste heat discharge pipe; 163. Thirteenth waste heat discharge pipe; 164. Fourteenth waste heat discharge pipe Pipelines: 171. First high-temperature heating pipeline; 172. Second high-temperature heating pipeline; 173. Third high-temperature heating pipeline; 174. Fourth high-temperature heating pipeline; 175. Fifth high-temperature heating pipeline; 176. Sixth high-temperature heating pipeline; 177. Seventh high-temperature heating pipeline; 178. Eighth high-temperature heating pipeline; 179. Ninth high-temperature heating pipeline; 180. Tenth high-temperature heating pipeline; 181. First low-temperature heat source pipeline; 182. Second low-temperature heat source pipeline; 183. Third low-temperature heat source pipeline; 184. Fourth low-temperature heat source pipeline; 185. Fifth low-temperature heat source pipeline; 186. Sixth low-temperature heat source pipeline; 187. Seventh low-temperature heat source pipeline; 188. Eighth low-temperature heat source pipeline; 189. Ninth low-temperature heat source pipeline; 190. Tenth low-temperature heat source pipeline. Detailed Implementation

[0037] In the description of this invention, it should be noted that the terms used in the various embodiments, such as "upper," "lower," "front," "rear," "left," and "right," which indicate orientation, are only used to simplify the description of the positional relationships based on the accompanying drawings and do not mean that the components and devices referred to must be operated in accordance with the specific orientations and defined operations, methods, and structures in the specification. Such directional terms do not constitute a limitation of this invention.

[0038] In the description of this invention, it should be noted that the terms "first," "second," and "third" mentioned in the embodiments of this invention are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," and "third" may explicitly or implicitly include one or more of that feature.

[0039] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0040] Combination Figure 1As shown, the first heat pump process heating device 1, the second heat pump process heating device 2, and the third heat pump process heating device 3 each include a process heat exchanger 1-1, a heat pump heat exchanger 1-2, a first high-temperature side regulating valve 1-11, a second high-temperature side regulating valve 1-12, a first low-temperature side regulating valve 1-13, a second low-temperature side regulating valve 1-14, a third low-temperature side regulating valve 1-15, a high-temperature side circulating pump 1-16, a low-temperature side circulating pump 1-17, a first start-up heat source pipeline 1-21, a first high-temperature water pipeline 1-22, a second high-temperature water pipeline 1-23, a second start-up heat source pipeline 1-24, a third high-temperature water pipeline 1-25, a fourth high-temperature water pipeline 1-26, a first exhaust cooling pipeline 1-31, a first low-temperature water pipeline 1-32, a second low-temperature water pipeline 1-33, a second exhaust cooling pipeline 1-34, a third low-temperature water pipeline 1-35, and a fourth low-temperature water pipeline 1-36.

[0041] The high-temperature side water supply pipeline connects to the inlet of the first start-up heat source pipeline 1-21. The outlet of the first start-up heat source pipeline 1-21 merges with the outlet of the fourth high-temperature water pipeline 1-26 and then connects to the inlet of the first high-temperature water pipeline 1-22. The outlet of the first high-temperature water pipeline 1-22 connects to the high-temperature side inlet of the process heat exchanger 1-1. The high-temperature side outlet of the process heat exchanger 1-1 connects to the inlet of the second high-temperature water pipeline 1-23. The outlet of the second high-temperature water pipeline 1-23 connects to... The inlet end of the second start-up heat source pipeline 1-24 is connected to the inlet end of the third high-temperature water pipeline 1-25. The outlet end of the second start-up heat source pipeline 1-24 is connected to the high-temperature side return water pipeline. The third high-temperature water pipeline 1-25 is sequentially equipped with a first high-temperature side regulating valve 1-11 and a high-temperature side circulating pump 1-16. The outlet end of the third high-temperature water pipeline 1-25 is connected to the high-level inlet end of the heat pump heat exchanger 1-2. The high-level outlet end of the heat pump heat exchanger 1-2 is connected to the inlet end of the fourth high-temperature water pipeline 1-26.

[0042] The low-temperature return water pipeline connects to the inlet of the first row of hot cooling pipelines 1-31. A third low-temperature regulating valve 1-15 is installed on the first row of hot cooling pipelines 1-31. The outlet of the first row of hot cooling pipelines 1-31 merges with the outlet of the fourth low-temperature water pipeline 1-36 and connects to the inlet of the first low-temperature water pipeline 1-32. A low-temperature circulating pump 1-17 is installed on the first low-temperature water pipeline 1-32. The outlet of the first low-temperature water pipeline 1-32 connects to the low-temperature inlet of the process heat exchanger 1-1. The low-temperature outlet of the process heat exchanger 1-1 connects to the second low-temperature... The inlet end of water pipe 1-33 is connected to the outlet end of the second low-temperature water pipe 1-33, which is connected to the inlet end of the second row of hot cooling pipe 1-34 and the inlet end of the third low-temperature water pipe 1-35 respectively. The second row of hot cooling pipe 1-34 is equipped with a first low-temperature side regulating valve 1-13. The outlet end of the second row of hot cooling pipe 1-34 is connected to the low-temperature side water supply pipe. The outlet end of the third low-temperature water pipe 1-35 is connected to the low-position inlet end of the heat pump heat exchanger 1-2. The low-position outlet end of the heat pump heat exchanger 1-2 is connected to the inlet end of the fourth low-temperature water pipe 1-36.

[0043] Operating principle of heat pump heating system:

[0044] Start-up phase: Open the second high-temperature side regulating valve 1-12 and close the first high-temperature side regulating valve 1-11. The high-grade hot water from the high-temperature side water supply pipeline flows through the process heat exchanger 1-1 to supply the heat required by the process and complete the start-up. At the same time, the first low-temperature side regulating valve 1-13 and the third low-temperature side regulating valve 1-15 are in the open state. The low-grade hot water from the low-temperature side water supply pipeline flows through the process heat exchanger 1-1 to carry away the waste heat discharged at the end of the process.

[0045] Self-operation phase: Open all regulating valves on the low-temperature side. Part of the waste heat at the end of the process is discharged to the low-level side pipeline through the cooling water circulation pipeline, and the other part is discharged through the third low-temperature water pipeline 1-35. At this time, the first high-temperature side regulating valve 1-11 is opened and the second high-temperature side regulating valve 1-12 is closed. The heat pump heat exchanger 1-2 is driven by electricity to improve the energy quality of the low-grade waste heat, heat the heat-use side outlet water of the process heat exchanger 1-1, and then supply heat to the process. The low-level water flows through the fourth low-temperature water pipeline 1-36 and merges with another stream of low-temperature return water flowing out from the first heat exhaust cooling pipeline 1-31 before continuing to enter the process heat exhaust side for cooling and temperature reduction, completing the cycle.

[0046] Specific Implementation Plan 1: Combining Figure 1 and Figure 2As shown, the present invention provides a fully electric driven heating system with an external heat source, including a first heat pump process heating device 1, a second heat pump process heating device 2, a third heat pump process heating device 3, a first process heat exchanger 4, a second process heat exchanger 5, a third process heat exchanger 6, a first heat pump heat exchanger 11, a second heat pump heat exchanger 12, a third heat pump heat exchanger 13, a cooling tower 16, a buried pipe 17, a low-level heat source heat exchanger 18, a first regulating valve 21, a second regulating valve 22, a third regulating valve 23, a fourth regulating valve 24, a fifth regulating valve 25, a sixth regulating valve 26, a first circulating pump 35, a second circulating pump 36, a third circulating pump 37, a fourth circulating pump 38, a fifth circulating pump 39, a first high-temperature heat pipe 41, and a second high-temperature heat pipe. Route 42, Third High-Temperature Heating Pipeline; 43, Fourth High-Temperature Heating Pipeline; 44, Fifth High-Temperature Heating Pipeline; 45, Sixth High-Temperature Heating Pipeline; 46, Seventh High-Temperature Heating Pipeline; 47, Eighth High-Temperature Heating Pipeline; 48, Ground Source Heating Pipeline; 55, Ground Source Regeneration Heating Pipeline; 56, Ground Source Water Supply Pipeline; 57, Ground Source Water Return Pipeline; 58, First Medium-Temperature Heating Pipeline; 61, Second Medium-Temperature Heating Pipeline; 62, Third Medium-Temperature Heating Pipeline; 63, Fourth Medium-Temperature Heating Pipeline; 64, Fifth Medium-Temperature Heating Pipeline; 65, Sixth Medium-Temperature Heating Pipeline; 66, First Normal-Temperature Heating Pipeline; 81, Second Normal-Temperature Heating Pipeline; 82, Third Normal-Temperature Heating Pipeline; 83, Fourth Normal-Temperature Heating Pipeline; 84, Fifth Normal-Temperature Heating Pipeline; 85, Sixth Normal-Temperature Heating Pipeline; 86, Seventh ambient temperature heat pipe 87, Eighth ambient temperature heat pipe 88, First cooling water circulation pipe 101, Second cooling water circulation pipe 102, Third cooling water circulation pipe 103, Fourth cooling water circulation pipe 104, Fifth cooling water circulation pipe 105, Sixth cooling water circulation pipe 106, Seventh cooling water circulation pipe 107, Eighth cooling water circulation pipe 108, Ninth cooling water circulation pipe 109, Tenth cooling water circulation pipe 110, Eleventh cooling water circulation pipe 111, Twelfth cooling water circulation pipe 112, Thirteenth cooling water circulation pipe 113, Fourteenth cooling water circulation pipe 114, Fifteenth cooling water circulation pipe 115, Sixteenth cooling water circulation pipe 116, First cooling water pipe 121, Second Cooling water pipeline 122, first process heat pipeline 131, second process heat pipeline 132, third process heat pipeline 133, fourth process heat pipeline 134, fifth process heat pipeline 135, sixth process heat pipeline 136, first waste heat discharge pipeline 151, second waste heat discharge pipeline 152, third waste heat discharge pipeline 153, fourth waste heat discharge pipeline 154, fifth waste heat discharge pipeline 155, sixth waste heat discharge pipeline 156, first high-temperature heating pipeline 171, second high-temperature heating pipeline 172, third high-temperature heating pipeline 173, fourth high-temperature heating pipeline 174, fifth high-temperature heating pipeline 175, sixth high-temperature heating pipeline 176, first low-temperature heat source pipeline 181, second low-temperature heat source pipeline 182.The third low-level heat source pipe 183, the fourth low-level heat source pipe 184, the fifth low-level heat source pipe 185, and the sixth low-level heat source pipe 186 are also mentioned.

[0047] First start-up heat source pipeline 1-21, second start-up heat source pipeline 1-24, third start-up heat source pipeline 2-21, fourth start-up heat source pipeline 2-24, fifth start-up heat source pipeline 3-21, sixth start-up heat source pipeline 3-24, first row of hot cooling pipeline 1-31, second row of hot cooling pipeline 1-34, third row of hot cooling pipeline 2-31, fourth row of hot cooling pipeline 2-34, fifth row of hot cooling pipeline 3-31, sixth row of hot cooling pipeline 3-34.

[0048] The outlet end of the first high-temperature heating pipeline 41 merges with the outlet end of the ground source heating pipeline 55 and then connects to the inlet end of the second high-temperature heating pipeline 42. The outlet end of the second high-temperature heating pipeline 42 is connected to the inlet end of the third high-temperature heating pipeline 43 and the inlet end of the first start-up heat source pipeline 1-21. The outlet end of the first start-up heat source pipeline 1-21 is connected to the high-level inlet end of the first heat pump process heating device 1. The high-level outlet end of the first heat pump process heating device 1 is connected to the inlet end of the second start-up heat source pipeline 1-24. The outlet end of the third high-temperature heating pipeline 43 is connected to the inlet end of the fourth high-temperature heating pipeline 44 and the inlet end of the third high-temperature heating pipeline 43. The inlet end of the first process heat pipe 131 is connected to the inlet end of the first process heat pipe 131, and the outlet end of the first process heat pipe 131 is connected to the high-temperature side inlet end of the first process heat exchanger 4. The high-temperature side outlet end of the first process heat exchanger 4 is connected to the inlet end of the second process heat pipe 132. The outlet end of the fourth high-temperature heat pipe 44 merges with the outlet end of the second high-temperature heating pipe 172 and then connects to the inlet end of the fifth high-temperature heat pipe 45. The fifth high-temperature heat pipe 45 is equipped with a first circulation pump 35, and the outlet end of the fifth high-temperature heat pipe 45 is connected to the inlet end of the sixth high-temperature heat pipe 46 and the inlet end of the first high-temperature heating pipe 171, respectively. The outlet end of the first high-temperature heating pipeline 171 is connected to the high-level inlet end of the first heat pump heat exchanger 11. The high-level outlet end of the first heat pump heat exchanger 11 is connected to the inlet end of the second high-temperature heating pipeline 172. The outlet end of the sixth high-temperature heating pipeline 46 merges with the outlet end of the second process heat pipeline 132 and then connects to the inlet end of the seventh high-temperature heating pipeline 47. The outlet end of the seventh high-temperature heating pipeline 47 merges with the outlet end of the second start-up heat source pipeline 1-24 and then connects to the inlet end of the eighth high-temperature heating pipeline 48. The outlet end of the eighth high-temperature heating pipeline 48 is connected to the inlet end of the first high-temperature heating pipeline 41 and the ground. The inlet end of the ground source heat return pipeline 56 is connected to the ground source heat return pipeline 56. The outlet end of the ground source heat return pipeline 56 is connected to the heat return inlet end of the low-level heat source heat exchanger 18. The heating outlet end of the low-level heat source heat exchanger 18 is connected to the inlet end of the ground source heating pipeline 55. The heat extraction outlet end of the low-level heat source heat exchanger 18 is connected to the inlet end of the ground source water supply pipeline 57. The ground source water supply pipeline 57 is equipped with a fifth circulation pump 39. The outlet end of the ground source water supply pipeline 57 is connected to the inlet end of the buried pipe 17. The outlet end of the buried pipe 17 is connected to the inlet end of the ground source return water pipeline 58. The outlet end of the ground source return water pipeline 58 is connected to the heat extraction inlet end of the low-level heat source heat exchanger 18.

[0049] The outlet end of the first intermediate temperature heating pipe 61 is connected to the inlet end of the second intermediate temperature heating pipe 62 and the inlet end of the third start-up heat source pipe 2-21, respectively. The outlet end of the third start-up heat source pipe 2-21 is connected to the high-level inlet end of the second heat pump process heating device 2. The high-level outlet end of the second heat pump process heating device 2 is connected to the inlet end of the fourth start-up heat source pipe 2-24. The outlet end of the second intermediate temperature heating pipe 62 is connected to the inlet end of the third intermediate temperature heating pipe 63 and the third process heat pipe 13, respectively. The inlet end of the third process heat pipe 133 is connected to the outlet end of the third process heat pipe 133, which is connected to the high-level inlet end of the second process heat exchanger 5. The high-level outlet end of the second process heat exchanger 5 is connected to the inlet end of the fourth process heat pipe 134. The outlet end of the third medium-temperature heat pipe 63 is connected to the inlet end of the fourth medium-temperature heat pipe 64 and the inlet end of the first low-level heat source pipe 181. The outlet end of the first low-level heat source pipe 181 is connected to the low-level inlet end of the first heat pump heat exchanger 11. The first heat pump heat exchanger 11... The low-level outlet end of the fifth medium-temperature heating pipeline 64 is connected to the inlet end of the second low-level heat source pipeline 182. The outlet end of the fourth medium-temperature heating pipeline 64 merges with the outlet end of the fourth high-temperature heating pipeline 174 and then connects to the inlet end of the fifth medium-temperature heating pipeline 65. The fifth medium-temperature heating pipeline 65 is equipped with a second circulation pump 36. The outlet end of the fifth medium-temperature heating pipeline 65 is connected to the inlet end of the sixth medium-temperature heating pipeline 66 and the inlet end of the third high-temperature heating pipeline 173. The outlet end of the third high-temperature heating pipeline 173 is connected to the second heat pump. The high-level inlet end of heat exchanger 12 is connected to the high-level outlet end of the second heat pump heat exchanger 12, which is connected to the inlet end of the fourth high-temperature heating pipeline 174. The outlet end of the sixth medium-temperature heating pipeline 66, the outlet end of the second low-level heat source pipeline 182, and the outlet end of the fourth process heat pipeline 134 merge and are connected to the inlet end of the seventh medium-temperature heating pipeline 67. The outlet end of the seventh medium-temperature heating pipeline 67 merges with the outlet end of the fourth start-up heat source pipeline 2-24 and is connected to the inlet end of the first medium-temperature heating pipeline 61.

[0050] The outlet end of the first ambient temperature heating pipe 81 is connected to the inlet end of the second ambient temperature heating pipe 82 and the inlet end of the fifth start-up heat source pipe 3-21, respectively. The outlet end of the fifth start-up heat source pipe 3-21 is connected to the high-level inlet end of the third heat pump process heating device 3. The high-level outlet end of the third heat pump process heating device 3 is connected to the inlet end of the sixth start-up heat source pipe 3-24. The outlet end of the second ambient temperature heating pipe 82 is connected to the inlet end of the third ambient temperature heating pipe 83 and the inlet end of the fifth process heat pipe 135, respectively. The outlet end of the fifth process heat pipe 135 is connected to the high-level inlet end of the third process heat exchanger 6. The high-level outlet end of the third process heat exchanger 6 is connected to the inlet end of the sixth process heat pipe 136. The outlet end of the third ambient temperature heat pipe 83 is connected to the inlet end of the fourth ambient temperature heat pipe 84 and the inlet end of the third low-level heat source pipe 183. The outlet end of the third low-level heat source pipe 183 is connected to the low-level inlet end of the second heat pump heat exchanger 12. The low-level outlet end of the second heat pump heat exchanger 12 is connected to the fourth low-level heat source pipe. The inlet end of pipe 184 is connected to the outlet end of the fourth ambient temperature heating pipe 84 and the outlet end of the sixth high temperature heating pipe 176, which then connect to the inlet end of the fifth ambient temperature heating pipe 85. A third circulating pump 37 is installed on the fifth ambient temperature heating pipe 85. The outlet end of the fifth ambient temperature heating pipe 85 is connected to the inlet end of both the sixth ambient temperature heating pipe 86 and the fifth high temperature heating pipe 175. The outlet end of the fifth high temperature heating pipe 175 is connected to the inlet end of the third heat pump heat exchanger 13. The outlet end of the third heat pump heat exchanger 13... The outlet end of the sixth high-temperature heating pipeline 176 is connected to the inlet end of the sixth ambient temperature heating pipeline 86. The outlet end of the sixth ambient temperature heating pipeline 86 and the outlet end of the fourth low-level heat source pipeline 184 merge and are then connected to the inlet end of the seventh ambient temperature heating pipeline 87. The outlet end of the seventh ambient temperature heating pipeline 87 merges with the outlet end of the sixth process heat pipeline 136 and is then connected to the inlet end of the eighth ambient temperature heating pipeline 88. The outlet end of the eighth ambient temperature heating pipeline 88 merges with the outlet end of the sixth start-up heat source pipeline 3-24 and is then connected to the inlet end of the first ambient temperature heating pipeline 81.

[0051] The outlet end of the first cooling water circulation pipe 101 merges with the outlet end of the second exhaust cooling pipe 1-34 and then connects to the inlet end of the second cooling water circulation pipe 102. The outlet end of the second cooling water circulation pipe 102 merges with the outlet end of the fourth exhaust cooling pipe 2-34 and then connects to the inlet end of the third cooling water circulation pipe 103. The outlet end of the third cooling water circulation pipe 103 merges with the outlet end of the sixth exhaust cooling pipe 3-34 and then connects to the inlet end of the fourth cooling water circulation pipe 104. The outlet end of the fourth cooling water circulation pipe 104 merges with the outlet end of the second waste heat discharge pipe 152 and then connects to the inlet end of the fifth cooling water circulation pipe 105. The outlet end of the fifth cooling water circulation pipe 105 connects to the fourth waste heat discharge pipe... The outlet ends of 154 merge and connect to the inlet end of the sixth cooling water circulation pipe 106. The outlet end of the sixth cooling water circulation pipe 106 merges with the outlet end of the sixth waste heat discharge pipe 156 and connects to the inlet end of the seventh cooling water circulation pipe 107. The outlet end of the seventh cooling water circulation pipe 107 connects to the inlet end of the eighth cooling water circulation pipe 108 and the inlet end of the fifth low-level heat source pipe 185. The outlet end of the fifth low-level heat source pipe 185 connects to the low-level inlet end of the third heat pump heat exchanger 13. The low-level outlet end of the third heat pump heat exchanger 13 connects to the inlet end of the sixth low-level heat source pipe 186. The outlet end of the eighth cooling water circulation pipe 108 connects to the inlet end of the ninth cooling water circulation pipe 109 and the first cooling water... The inlet end of pipe 121 is connected to the outlet end of the first cooling water pipe 121, which is connected to the inlet end of the cooling tower 16. The outlet end of the cooling tower 16 is connected to the inlet end of the second cooling water pipe 122. The outlet end of the ninth cooling water circulation pipe 109 merges with the outlet end of the second cooling water pipe 122 and then connects to the inlet end of the tenth cooling water circulation pipe 110. The tenth cooling water circulation pipe 110 is equipped with a fourth circulation pump 38. The outlet end of the tenth cooling water circulation pipe 110 merges with the outlet end of the sixth low-level heat source pipe 186 and then connects to the inlet end of the eleventh cooling water circulation pipe 111. The outlet end of the eleventh cooling water circulation pipe 111 is connected to the inlet end of the twelfth cooling water circulation pipe 112 and the fifth waste heat discharge pipe 155, respectively. The inlet end of the fifth waste heat discharge pipe 155 is connected to the outlet end of the wastewater inlet end of the third process heat exchanger 6. The outlet end of the third process heat exchanger 6 is connected to the inlet end of the sixth waste heat discharge pipe 156. The outlet end of the twelfth cooling water circulation pipe 112 is connected to the inlet end of the thirteenth cooling water circulation pipe 113 and the inlet end of the third waste heat discharge pipe 153. The outlet end of the third waste heat discharge pipe 153 is connected to the wastewater inlet end of the second process heat exchanger 5. The wastewater outlet end of the second process heat exchanger 5 is connected to the inlet end of the fourth waste heat discharge pipe 154. The outlet end of the thirteenth cooling water circulation pipe 113 is connected to the inlet end of the fourteenth cooling water circulation pipe 114 and the inlet end of the first waste heat discharge pipe 151.The outlet end of the first waste heat discharge pipe 151 is connected to the wastewater inlet end of the first process heat exchanger 4. The wastewater outlet end of the first process heat exchanger 4 is connected to the inlet end of the second waste heat discharge pipe 152. The outlet end of the fourteenth cooling water circulation pipe 114 is connected to the inlet end of the fifteenth cooling water circulation pipe 115 and the inlet end of the fifth heat cooling pipe 3-31. The outlet end of the fifth heat cooling pipe 3-31 is connected to the low-level inlet end of the third heat pump process heating device 3. The low-level outlet end of the third heat pump process heating device 3 is connected to the inlet end of the sixth heat cooling pipe 3-34. The outlet end of the fifteenth cooling water circulation pipe 115 is connected to the sixteenth cooling water circulation pipe 114. The inlet end of the sixteenth cooling water circulation pipe 116 is connected to the inlet end of the third row of hot cooling pipes 2-31. The outlet end of the third row of hot cooling pipes 2-31 is connected to the low-level inlet end of the second heat pump process heating device 2. The low-level outlet end of the second heat pump process heating device 2 is connected to the inlet end of the fourth row of hot cooling pipes 2-34. The outlet end of the sixteenth cooling water circulation pipe 116 is connected to the inlet end of the first cooling water circulation pipe 101 and the inlet end of the first row of hot cooling pipes 1-31. The outlet end of the first row of hot cooling pipes 1-31 is connected to the low-level inlet end of the first heat pump process heating device 1. The low-level outlet end of the first heat pump process heating device 1 is connected to the inlet end of the second row of hot cooling pipes 1-34.

[0052] The first process heat pipe 131 is equipped with a first regulating valve 21, the first waste heat discharge pipe 151 is equipped with a second regulating valve 22, the third process heat pipe 133 is equipped with a third regulating valve 23, the third waste heat discharge pipe 153 is equipped with a fourth regulating valve 24, the fifth process heat pipe 135 is equipped with a fifth regulating valve 25, and the fifth waste heat discharge pipe 155 is equipped with a sixth regulating valve 26.

[0053] The operating principle of the implementation plan:

[0054] The high-temperature thermal busbar consists of a supply and return water circulation system composed of high-temperature thermal pipelines, which can achieve supply and return water temperatures of 95℃ / 90℃ through the first circulation pump 35; the medium-temperature thermal busbar consists of a supply and return water circulation system composed of medium-temperature thermal pipelines, which can achieve supply and return water temperatures of 80℃ / 70℃ through the second circulation pump 36; the normal-temperature thermal busbar consists of a supply and return water circulation system composed of normal-temperature thermal pipelines, which can achieve supply and return water temperatures of 60℃ / 50℃ through the third circulation pump 37; the environmental heat source end, composed of cooling water circulation pipelines, is called the cooling water circulation busbar, which can centrally discharge excess waste heat through the cooling tower 16, and achieve supply and return water temperatures of 40℃ / 35℃ through the fourth circulation pump 38; the four sets of circulation busbars are arranged sequentially from top to bottom, which can realize energy cascade utilization and circulation.

[0055] Specifically, the high-temperature heat busbar can provide a start-up heat source for the first heat pump process heating device 1. After startup, the device adjusts to self-circulation operation, that is, drives the internal heat pump equipment to meet the process-side heating demand. Excess waste heat of the system is discharged to the cooling water circulation pipeline through the first exhaust cooling pipeline 1-31. In addition to its startup function, the high-temperature heat busbar can also directly supply heat to the process end. The high-temperature heat busbar can supply approximately 95°C to the first process heat exchanger 4 (high-temperature zone process end) through the first process heat pipeline 131. The hot water, after heat exchange, returns to a temperature of around 90°C. The corresponding first heat pump heat exchanger 11 is electrically driven and absorbs heat from the 80°C supply water on the low side through the first low-level heat source pipeline 181, which can raise the return water temperature of the high-temperature heat bus from 90°C to 95°C, thereby maintaining the energy balance of the high-temperature heat bus. The excess waste heat after being used by the first process heat exchanger 4 achieves a cooling cycle of 35°C / 40°C through the first waste heat discharge pipeline 151 and the second waste heat discharge pipeline 152.

[0056] The medium-temperature thermal busbar provides a start-up heat source for the second heat pump process heating unit 2. After startup, it drives the internal heat pump equipment to meet the process-side heating needs, completing the unit's self-circulation operation. Excess waste heat from the process unit is cooled and circulated by the third row of heat cooling pipes 2-31 and the fourth row of heat cooling pipes 2-34. In addition to serving as a start-up heat source, the medium-temperature thermal busbar can directly supply hot water at approximately 80°C to the second process heat exchanger 5 (medium-temperature zone process end) via the third process heat pipe 133. After heat exchange... The return water temperature is around 70℃. The corresponding second heat pump heat exchanger 12 is electrically driven and absorbs the heat from the 60℃ supply water on the low side through the third low-temperature heat source pipe 183 and the fourth low-temperature heat source pipe 184. This can raise the return water temperature of the medium-temperature heat bus from 70℃ to 80℃, thereby maintaining the energy balance of the medium-temperature heat bus. The excess waste heat after being used by the second process heat exchanger 5 achieves a cooling cycle of 35℃ / 40℃ through the third waste heat discharge pipe 153 and the fourth waste heat discharge pipe 154.

[0057] The ambient temperature heat bus serves as the start-up heat source for the third heat pump process heating unit 3. After startup, it drives the internal heat pump equipment to meet the process-side heating needs, completing the unit's self-circulation operation. Excess waste heat from the process unit is cooled and circulated by the fifth row of heat cooling pipes 3-31 and the sixth row of heat cooling pipes 3-34. In addition to its startup function, the ambient temperature heat bus can supply hot water at approximately 60°C to the third process heat exchanger 6 (the process end in the ambient temperature zone) through the fifth process heat pipe 135. The return water temperature after heat exchange is... The temperature is around 50℃. The corresponding third heat pump heat exchanger 13 is electrically driven. It absorbs the heat from the 40℃ supply water on the low side through the fifth low-temperature heat source pipe 185 and the sixth low-temperature heat source pipe 186, which can raise the return water temperature of the ambient temperature heat bus from 50℃ to 60℃, thereby maintaining the energy balance of the ambient temperature heat bus. The excess waste heat after being used by the third process heat exchanger 6 achieves a cooling cycle of 35℃ / 40℃ through the fifth waste heat discharge pipe 155 and the sixth waste heat discharge pipe 156.

[0058] The entire cycle is based on renewable energy sources, represented by geothermal energy. The low-level heat source heat exchanger 18 enhances the quality of medium-deep geothermal energy and supplies it to the high-temperature thermal bus, providing the necessary basic guarantee for external heat sources.

[0059] Overall, two effects are achieved: the high-temperature, medium-temperature, and normal-temperature heat busbars provide heat sources of 95℃, 80℃, and 60℃ respectively for the process ends at different temperature ranges. The cascaded heat busbars can serve as the start-up heat source for the heat pump process heating device, driving the internal heat pump equipment to achieve self-circulation heating operation after startup, and can also directly supply heat to the process ends to meet the heating needs of different types of process ends, thus improving the adaptability of process heating. For waste heat generated at the end of the process, it is centrally introduced into the cooling water circulation busbar through the waste heat discharge pipeline, realizing centralized recovery of waste heat across the entire chain covering a large temperature difference range of 35℃ to 95℃. Relying on the temperature increase of the multi-stage heat pump, a large amount of low-grade waste heat is converted into usable thermal energy and recycled within the system, thereby significantly improving the level of energy cascade utilization and the overall system energy efficiency.

[0060] The entire cycle is based on renewable energy, providing the start-up heat source for the overall internal circulation system and serving as a peak-shaving or emergency heat source when necessary. Deep geothermal energy is the core energy source, with excess heat discharged through cooling towers to ensure stable and efficient supply.

[0061] Specific Implementation Plan Two: Combining Figure 1 and Figure 3As shown, this invention provides a fully electric driven heating system with an external heat source, including a first heat pump process heating device 1, a second heat pump process heating device 2, a third heat pump process heating device 3, a first process heat exchanger 4, a second process heat exchanger 5, a third process heat exchanger 6, a fourth process heat exchanger 7, a fifth process heat exchanger 8, a sixth process heat exchanger 9, a seventh process heat exchanger 10, a first heat pump heat exchanger 11, a second heat pump heat exchanger 12, a third heat pump heat exchanger 13, a fourth heat pump heat exchanger 14, a fifth heat pump heat exchanger 15, a cooling tower 16, a buried pipe 17, a low-level heat source heat exchanger 18, a first regulating valve 21, a second regulating valve 22, a third regulating valve 23, a fourth regulating valve 24, a fifth regulating valve 25, a sixth regulating valve 26, and a seventh process heat exchanger 10. Regulating valve 27, regulating valve 28, regulating valve 29, regulating valve 30, regulating valve 31, regulating valve 32, regulating valve 33, regulating valve 34, regulating valve 35, circulating pump 36, circulating pump 37, circulating pump 38, circulating pump 39, high-temperature heating pipeline 41, high-temperature heating pipeline 42, high-temperature heating pipeline 43, high-temperature heating pipeline 44, high-temperature heating pipeline 1 45-1, high-temperature heating pipeline 2 45-2, high-temperature heating pipeline 3 45-3, high-temperature heating pipeline 4 45-4, high-temperature heating pipeline 9 49, high-temperature heating pipeline 10 50, high-temperature heating pipeline 11 51, high-temperature heating pipeline 12 Pipeline 52, Thirteenth High-Temperature Heating Pipeline 53, Fourteenth High-Temperature Heating Pipeline 54, Ground Source Heating Pipeline 55, Ground Source Regeneration Heating Pipeline 56, Ground Source Water Supply Pipeline 57, Ground Source Return Water Pipeline 58, First Medium-Temperature Heating Pipeline 61, Second Medium-Temperature Heating Pipeline 62, Third Medium-Temperature Heating Pipeline 63, Fourth Medium-Temperature Heating Pipeline I 64-1, Fourth Medium-Temperature Heating Pipeline II 64-2, Fourth Medium-Temperature Heating Pipeline III 64-3, Fourth Medium-Temperature Heating Pipeline IV 64-4, Eighth Medium-Temperature Heating Pipeline 68, Ninth Medium-Temperature Heating Pipeline 69, Tenth Medium-Temperature Heating Pipeline 70, Eleventh Medium-Temperature Heating Pipeline 71, Twelfth Medium-Temperature Heating Pipeline 72, Thirteenth Medium-Temperature Heating Pipeline 73, Fourteenth Medium-Temperature Heating Pipeline 74, Fifteenth Medium-Temperature Heating Pipeline 75, Sixteen medium-temperature heating pipes 76, First ambient-temperature heating pipe 81, Second ambient-temperature heating pipe 82, Third ambient-temperature heating pipe 83, Fourth ambient-temperature heating pipe 1 84-1, Fourth ambient-temperature heating pipe 2 84-2, Fourth ambient-temperature heating pipe 3 84-3, Fourth ambient-temperature heating pipe 4 84-4, Fourth ambient-temperature heating pipe 5 84-5, Ninth ambient-temperature heating pipe 89, Tenth ambient-temperature heating pipe 90, Eleventh ambient-temperature heating pipe 91, Twelfth ambient-temperature heating pipe 92, Thirteenth ambient-temperature heating pipe 93, Fourteenth ambient-temperature heating pipe 94, First cooling water circulation pipe 101, Second cooling water circulation pipe 102, Third cooling water circulation pipe 103, Fourth cooling water circulation pipe 104, Fifth cooling water circulation pipe 105.The following are listed: Sixth Cooling Water Circulation Pipe 106, Seventh Cooling Water Circulation Pipe 107, Eighth Cooling Water Circulation Pipe 1 108-1, Eighth Cooling Water Circulation Pipe 2 108-2, Eighth Cooling Water Circulation Pipe 3 108-3, Eighth Cooling Water Circulation Pipe 4 108-4, Eighth Cooling Water Circulation Pipe 5 108-5, Eighth Cooling Water Circulation Pipe 6 108-6, Twenty-first Cooling Water Circulation Pipe 123, Twenty-second Cooling Water Circulation Pipe 124, Twenty-third Cooling Water Circulation Pipe 125, Twenty-fourth Cooling Water Circulation Pipe 126, Twenty-fifth Cooling Water Circulation Pipe 127, and Twenty-sixth Cooling Water Circulation Pipe. 128. Twenty-seventh Cooling Water Circulation Pipeline; 129. First Cooling Water Pipeline; 121. Second Cooling Water Pipeline; 122. First Process Heat Pipeline; 131. Second Process Heat Pipeline; 132. Third Process Heat Pipeline; 133. Fourth Process Heat Pipeline; 134. Fifth Process Heat Pipeline; 135. Sixth Process Heat Pipeline; 136. Seventh Process Heat Pipeline; 137. Eighth Process Heat Pipeline; 138. Ninth Process Heat Pipeline; 139. Tenth Process Heat Pipeline; 140. Eleventh Process Heat Pipeline; 141. Twelfth Process Heat Pipeline; 142. Thirteenth Process Heat Pipeline; 143. Fourteenth Process Heat Pipeline 144. First waste heat discharge pipeline; 151. Second waste heat discharge pipeline; 152. Third waste heat discharge pipeline; 153. Fourth waste heat discharge pipeline; 154. Fifth waste heat discharge pipeline; 155. Sixth waste heat discharge pipeline; 156. Seventh waste heat discharge pipeline; 157. Eighth waste heat discharge pipeline; 158. Ninth waste heat discharge pipeline; 159. Tenth waste heat discharge pipeline; 160. Eleventh waste heat discharge pipeline; 161. Twelfth waste heat discharge pipeline; 162. Thirteenth waste heat discharge pipeline; 163. Fourteenth waste heat discharge pipeline; 164. First high-temperature heating pipeline; 171. Second high-temperature heating pipeline; 172. Third high-temperature heating pipeline. 173, Fourth High-Temperature Heating Pipeline; 174, Fifth High-Temperature Heating Pipeline; 175, Sixth High-Temperature Heating Pipeline; 176, Seventh High-Temperature Heating Pipeline; 177, Eighth High-Temperature Heating Pipeline; 178, Ninth High-Temperature Heating Pipeline; 179, Tenth High-Temperature Heating Pipeline; 180, First Low-Level Heat Source Pipeline; 181, Second Low-Level Heat Source Pipeline; 182, Third Low-Level Heat Source Pipeline; 183, Fourth Low-Level Heat Source Pipeline; 184, Fifth Low-Level Heat Source Pipeline; 185, Sixth Low-Level Heat Source Pipeline; 186, Seventh Low-Level Heat Source Pipeline; 187, Eighth Low-Level Heat Source Pipeline; 188, Ninth Low-Level Heat Source Pipeline; 189, Tenth Low-Level Heat Source Pipeline; 190,

[0062] First start-up heat source pipeline 1-21, second start-up heat source pipeline 1-24, third start-up heat source pipeline 2-21, fourth start-up heat source pipeline 2-24, fifth start-up heat source pipeline 3-21, sixth start-up heat source pipeline 3-24, first row of hot cooling pipeline 1-31, second row of hot cooling pipeline 1-34, third row of hot cooling pipeline 2-31, fourth row of hot cooling pipeline 2-34, fifth row of hot cooling pipeline 3-31, sixth row of hot cooling pipeline 3-34.

[0063] The outlet end of the first high-temperature heating pipeline 41 and the outlet end of the ground source heating pipeline 55 merge and are connected to the inlet end of the second high-temperature heating pipeline 42. The outlet end of the second high-temperature heating pipeline 42 is connected to the inlet end of the third high-temperature heating pipeline 43 and the inlet end of the first start-up heat source pipeline 1-21. The outlet end of the first start-up heat source pipeline 1-21 is connected to the high-level inlet end of the first heat pump process heating device 1. The high-level outlet end of the first heat pump process heating device 1 is connected to the inlet end of the second start-up heat source pipeline 1-24. The outlet end of the third high-temperature heating pipeline 43 is connected to the inlet end of the fourth high-temperature heating pipeline 44 and the inlet end of the first process heat pipeline 131. The outlet end of the first process heat pipeline 131 is connected to the first process heat pipeline 1-24. The high-temperature side inlet of the first process heat exchanger 4 is connected to the inlet of the second process heat pipe 132. The outlet of the fourth high-temperature heat pipe 44 is connected to the inlet of the fifth high-temperature heat pipe 45-1 and the inlet of the ninth process heat pipe 139. The outlet of the ninth process heat pipe 139 is connected to the high-temperature side inlet of the fifth process heat exchanger 8. The high-temperature side outlet of the fifth process heat exchanger 8 is connected to the inlet of the tenth process heat pipe 140. The outlet of the fifth high-temperature heat pipe 45-1 is connected to the inlet of the fifth high-temperature heat pipe 45-2 and the inlet of the thirteenth process heat pipe 143. The outlet of the thirteenth process heat pipe 143 is connected to the inlet of the fifth high-temperature heat pipe 45-2 and the inlet of the thirteenth process heat pipe 143. The high-temperature side inlet of the seventh process heat exchanger 10 is connected to the high-temperature side outlet of the seventh process heat exchanger 10, which is connected to the inlet of the fourteenth process heat pipe 144. The outlet of the fifth high-temperature heat pipe 2 45-2 merges with the outlet of the second high-temperature heating pipe 172 and then connects to the inlet of the fifth high-temperature heat pipe 3 45-3. The outlet of the fifth high-temperature heat pipe 3 45-3 merges with the outlet of the tenth high-temperature heating pipe 180 and then connects to the inlet of the fifth high-temperature heat pipe 45-4. The fifth high-temperature heat pipe 45-4 is equipped with a first circulation pump 35. The outlet of the fifth high-temperature heat pipe 45-4 is connected to the inlet of the ninth high-temperature heat pipe 49 and the inlet of the ninth high-temperature heating pipe 179, respectively. The outlet end of the ninth high-temperature heating pipeline 179 is connected to the high-level inlet end of the fifth heat pump heat exchanger 15. The high-level outlet end of the fifth heat pump heat exchanger 15 is connected to the inlet end of the tenth high-temperature heating pipeline 180. The outlet end of the ninth high-temperature heating pipeline 49 is connected to the inlet end of the tenth high-temperature heating pipeline 50 and the inlet end of the first high-temperature heating pipeline 171. The outlet end of the first high-temperature heating pipeline 171 is connected to the high-level inlet end of the first heat pump heat exchanger 11. The high-level outlet end of the first heat pump heat exchanger 11 is connected to the inlet end of the second high-temperature heating pipeline 172. The outlet end of the tenth high-temperature heating pipeline 50 and the outlet end of the fourteenth process heat pipeline 144 merge and are then connected to the inlet end of the eleventh high-temperature heating pipeline 51.The outlet end of the eleventh high-temperature heat pipe 51 merges with the outlet end of the tenth process heat pipe 140 and then connects to the inlet end of the twelfth high-temperature heat pipe 52. The outlet end of the twelfth high-temperature heat pipe 52 merges with the outlet end of the second process heat pipe 132 and then connects to the inlet end of the thirteenth high-temperature heat pipe 53. The outlet end of the thirteenth high-temperature heat pipe 53 merges with the outlet end of the second start-up heat source pipes 1-24 and then connects to the inlet end of the fourteenth high-temperature heat pipe 54. The outlet end of the fourteenth high-temperature heat pipe 54 connects to the inlet end of the first high-temperature heat pipe 41 and the ground source regeneration pipe 5. The inlet end of the ground source heat exchanger 56 is connected to the ground source heat exchanger 18, the outlet end of the ground source heat exchanger 56 is connected to the heat exchanger inlet end of the low-level heat source heat exchanger 18, the heating outlet end of the low-level heat source heat exchanger 18 is connected to the inlet end of the ground source heating pipeline 55, the heat extraction outlet end of the low-level heat source heat exchanger 18 is connected to the inlet end of the ground source water supply pipeline 57, the ground source water supply pipeline 57 is equipped with a fifth circulation pump 39, the outlet end of the ground source water supply pipeline 57 is connected to the inlet end of the buried pipe 17, the outlet end of the buried pipe 17 is connected to the inlet end of the ground source return water pipeline 58, and the outlet end of the ground source return water pipeline 58 is connected to the heat extraction inlet end of the low-level heat source heat exchanger 18.

[0064] The outlet end of the first intermediate-temperature heating pipe 61 is connected to the inlet end of the second intermediate-temperature heating pipe 62 and the inlet end of the third start-up heat source pipe 2-21. The outlet end of the third start-up heat source pipe 2-21 is connected to the high-level inlet end of the second heat pump process heating device 2. The high-level outlet end of the second heat pump process heating device 2 is connected to the inlet end of the fourth start-up heat source pipe 2-24. The outlet end of the second intermediate-temperature heating pipe 62 is connected to the inlet end of the third intermediate-temperature heating pipe 63 and the inlet end of the third process heat pipe 133. The outlet end of the third process heat pipe 133 is connected to the high-temperature side inlet end of the second process heat exchanger 5. The high-temperature side outlet end of the second process heat exchanger 5 is connected to the inlet end of the fourth process heat pipe 134. The third intermediate-temperature heating pipe... The outlet end of line 63 is connected to the inlet end of the fourth intermediate temperature heat pipe 64-1 and the inlet end of the seventh process heat pipe 137. The outlet end of the seventh process heat pipe 137 is connected to the high-temperature side inlet end of the fourth process heat exchanger 7. The high-temperature side outlet end of the fourth process heat exchanger 7 is connected to the inlet end of the eighth process heat pipe 138. The outlet end of the fourth intermediate temperature heat pipe 64-1 is connected to the inlet end of the fourth intermediate temperature heat pipe 64-2 and the inlet end of the eleventh process heat pipe 141. The outlet end of the eleventh process heat pipe 141 is connected to the high-temperature side inlet end of the sixth process heat exchanger 9. The high-temperature side outlet end of the sixth process heat exchanger 9 is connected to the inlet end of the twelfth process heat pipe 142. The fourth intermediate temperature heat pipe 64-2... The outlet of the -2 line merges with the outlet of the fourteenth waste heat discharge pipeline 164 and then connects to the inlet of the fourth intermediate temperature heating pipeline 3 64-3. The outlet of the fourth intermediate temperature heating pipeline 3 64-3 connects to the inlet of the fourth intermediate temperature heating pipeline 4 64-4 and the inlet of the first low-level heat source pipeline 181. The outlet of the first low-level heat source pipeline 181 connects to the low-level inlet of the first heat pump heat exchanger 11. The low-level outlet of the first heat pump heat exchanger 11 connects to the inlet of the second low-level heat source pipeline 182. The outlet of the fourth intermediate temperature heating pipeline 4 64-4 merges with the outlet of the fourth high-temperature heating pipeline 174 and then connects to the inlet of the eighth intermediate temperature heating pipeline 68. The outlet of the eighth intermediate temperature heating pipeline 68 connects to the eighth high-temperature heating pipeline 174. The outlet ends of pipe 8 converge and connect to the inlet end of pipe 69, which is equipped with a second circulating pump 36. The outlet end of pipe 69 is connected to the inlet end of pipe 70, which is connected to the inlet end of pipe 70, which is connected to the inlet end of pipe 177, which is connected to the high-level inlet end of pipe 14, which is connected to the inlet end of pipe 178, which is connected to the inlet end of pipe 70, which is connected to the inlet end of pipe 71, which is connected to the inlet end of pipe 173, which is connected to the inlet end of pipe 173, which is connected to the high-level inlet end of pipe 12, which is connected to the outlet end of pipe 70, which is connected to the inlet end of pipe 71, which is connected to the inlet end of pipe 71, which is connected to the inlet end of pipe 173, which is connected to the high-level inlet end of pipe 12, which is connected to the outlet end of pipe 70.The high-level outlet end of the second heat pump heat exchanger 12 is connected to the inlet end of the fourth high-temperature heating pipeline 174. The outlet end of the eleventh medium-temperature heating pipeline 71 and the outlet end of the second low-temperature heat source pipeline 182 merge and are connected to the inlet end of the twelfth medium-temperature heating pipeline 72. The outlet end of the twelfth medium-temperature heating pipeline 72 is connected to the inlet end of the thirteenth medium-temperature heating pipeline 73 and the inlet end of the thirteenth waste heat discharge pipeline 163. The outlet end of the thirteenth waste heat discharge pipeline 163 is connected to the low-temperature side inlet end of the seventh process heat exchanger 10. The low-temperature side outlet end of the seventh process heat exchanger 10 is connected to the inlet end of the fourteenth waste heat discharge pipeline 164. The outlet end of the 13th medium-temperature heating pipeline 73 merges with the outlet end of the 12th process heat pipeline 142 and then connects to the inlet end of the 14th medium-temperature heating pipeline 74. The outlet end of the 14th medium-temperature heating pipeline 74 merges with the outlet end of the 8th process heat pipeline 138 and then connects to the inlet end of the 15th medium-temperature heating pipeline 75. The outlet end of the 15th medium-temperature heating pipeline 75 merges with the outlet end of the 4th process heat pipeline 134 and then connects to the inlet end of the 16th medium-temperature heating pipeline 76. The outlet end of the 16th medium-temperature heating pipeline 76 merges with the outlet end of the 4th start-up heat source pipeline 2-24 and then connects to the inlet end of the 1st medium-temperature heating pipeline 61.

[0065] The outlet end of the first ambient temperature heating pipe 81 is connected to the inlet end of the second ambient temperature heating pipe 82 and the inlet end of the fifth start-up heat source pipe 3-21, respectively. The outlet end of the fifth start-up heat source pipe 3-21 is connected to the high-temperature side inlet end of the third heat pump process heating device 3. The high-temperature side outlet end of the third heat pump process heating device 3 is connected to the inlet end of the sixth start-up heat source pipe 3-24. The outlet end of the second ambient temperature heating pipe 82 is connected to the inlet end of the third ambient temperature heating pipe 83 and the inlet end of the fifth process heat pipe 135, respectively. The outlet end of the fifth process heat pipe 135 is connected to the high-temperature side inlet end of the third process heat exchanger 6. The high-temperature side outlet end of the third process heat exchanger 6 is connected to the inlet end of the sixth process heat pipe 136. The outlet end of heat pipe 83 merges with the outlet end of the tenth waste heat discharge pipe 160 and then connects to the inlet end of the fourth ambient temperature heat pipe 84-1. The outlet end of the fourth ambient temperature heat pipe 84-1 merges with the outlet end of the twelfth waste heat discharge pipe 162 and then connects to the inlet end of the fourth ambient temperature heat pipe 84-2. The outlet end of the fourth ambient temperature heat pipe 84-2 connects to the inlet end of the fourth ambient temperature heat pipe 84-3 and the inlet end of the third low-level heat source pipe 183. The outlet end of the third low-level heat source pipe 183 connects to the low-level inlet end of the second heat pump heat exchanger 12. The low-level outlet end of the second heat pump heat exchanger 12 connects to the inlet end of the fourth low-level heat source pipe 184. The outlet end of the fourth ambient temperature heat pipe 84-3 connects to... The outlet of the sixth high-temperature heating pipeline 176 merges with the inlet of the fourth ambient temperature heating pipeline 84-4. The outlet of the fourth ambient temperature heating pipeline 84-4 connects to the inlet of the fourth ambient temperature heating pipeline 84-5 and the inlet of the ninth low-temperature heat source pipeline 189. The outlet of the ninth low-temperature heat source pipeline 189 connects to the low-level inlet of the fifth heat pump heat exchanger 15. The low-level outlet of the fifth heat pump heat exchanger 15 connects to the inlet of the tenth low-temperature heat source pipeline 190. The fourth ambient temperature heating pipeline 84-5 is equipped with a third circulating pump 37. The outlet of the fourth ambient temperature heating pipeline 84-5 merges with the outlet of the tenth low-temperature heat source pipeline 190 and connects to the inlet of the ninth ambient temperature heating pipeline 89. The outlet of pipe 89 is connected to the inlet of the tenth ambient temperature heating pipe 90 and the inlet of the fifth high temperature heating pipe 175. The outlet of the fifth high temperature heating pipe 175 is connected to the high-level inlet of the third heat pump heat exchanger 13. The high-level outlet of the third heat pump heat exchanger 13 is connected to the inlet of the sixth high temperature heating pipe 176. The outlet of the tenth ambient temperature heating pipe 90 merges with the outlet of the fourth low-level heat source pipe 184 and is then connected to the inlet of the eleventh ambient temperature heating pipe 91. The outlet of the eleventh ambient temperature heating pipe 91 is connected to the inlet of the twelfth ambient temperature heating pipe 92 and the inlet of the eleventh waste heat discharge pipe 161. The outlet of the eleventh waste heat discharge pipe 161 is connected to the low-temperature side inlet of the sixth process heat exchanger 9.The low-temperature outlet of the sixth process heat exchanger 9 is connected to the inlet of the twelfth waste heat discharge pipeline 162. The outlet of the twelfth ambient temperature heating pipeline 92 is connected to the inlet of the thirteenth ambient temperature heating pipeline 93 and the inlet of the ninth waste heat discharge pipeline 159. The outlet of the ninth waste heat discharge pipeline 159 is connected to the low-temperature inlet of the fifth process heat exchanger 8. The low-temperature outlet of the fifth process heat exchanger 8 is connected to the inlet of the tenth waste heat discharge pipeline 160. The outlet of the thirteenth ambient temperature heating pipeline 93 merges with the outlet of the sixth process heat supply pipeline 136 and then connects to the inlet of the fourteenth ambient temperature heating pipeline 94. The outlet of the fourteenth ambient temperature heating pipeline 94 merges with the outlet of the sixth start-up heat source pipeline 3-24 and then connects to the inlet of the first ambient temperature heating pipeline 81.

[0066] The outlet end of the first cooling water circulation pipe 101 merges with the outlet end of the second row of hot cooling pipes 1-34 and then connects to the inlet end of the second cooling water circulation pipe 102. The outlet end of the second cooling water circulation pipe 102 merges with the outlet end of the fourth row of hot cooling pipes 2-34 and then connects to the inlet end of the third cooling water circulation pipe 103. The outlet end of the third cooling water circulation pipe 103 merges with the outlet end of the sixth row of hot cooling pipes 3-34 and then connects to the inlet end of the fourth cooling water circulation pipe 104. The outlet end of the fourth cooling water circulation pipe 104 connects to the outlet end of the second waste heat discharge pipe 152. After merging, it connects to the inlet end of the fifth cooling water circulation pipe 105. The outlet end of the fifth cooling water circulation pipe 105 merges with the outlet end of the fourth waste heat discharge pipe 154 and then connects to the inlet end of the sixth cooling water circulation pipe 106. The outlet end of the sixth cooling water circulation pipe 106 merges with the outlet end of the sixth waste heat discharge pipe 156 and then connects to the inlet end of the seventh cooling water circulation pipe 107. The outlet end of the seventh cooling water circulation pipe 107 merges with the outlet end of the eighth waste heat discharge pipe 158 and then connects to the inlet end of the eighth cooling water circulation pipe 108-1.

[0067] The outlet end of 108-1 is connected to the inlet end of the eighth cooling water circulation pipeline 108-2 and the inlet end of the fifth low-level heat source pipeline 185, respectively. The outlet end of the fifth low-level heat source pipeline 185 is connected to the low-level inlet end of the third heat pump heat exchanger 13. The low-level outlet end of the third heat pump heat exchanger 13 is connected to the inlet end of the sixth low-level heat source pipeline 186. The outlet end of the eighth cooling water circulation pipeline 108-2 is connected to the inlet end of the eighth cooling water circulation pipeline 108-3 and the inlet end of the seventh low-level heat source pipeline 187, respectively. The outlet end of the seventh low-level heat source pipeline 187 is connected to the low-level inlet end of the fourth heat pump heat exchanger 14. The low-level outlet end of the fourth heat pump heat exchanger 14 is connected to the eighth low-level heat source pipeline. The inlet end of 188 is connected, and the outlet end of the eighth cooling water circulation pipe 3 108-3 is connected to the inlet end of the eighth cooling water circulation pipe 4 108-4 and the inlet end of the first cooling water pipe 121 respectively. The outlet end of the first cooling water pipe 121 is connected to the inlet end of the cooling tower 16, and the outlet end of the cooling tower 16 is connected to the inlet end of the second cooling water pipe 122. The eighth cooling water circulation pipe 4 108-4 is equipped with a fourth circulation pump 38. The outlet end of the eighth cooling water circulation pipe 4 108-4 and the outlet end of the second cooling water pipe 122 merge and are connected to the inlet end of the eighth cooling water circulation pipe 5 108-5. The outlet end of the eighth cooling water circulation pipe 5 108-5 is connected to the eighth low-level heat source pipe. The outlet of line 188 merges with the inlet of the eighth cooling water circulation line 6 108-6. The outlet of the eighth cooling water circulation line 6 108-6 merges with the outlet of the sixth low-level heat source line 186 and then connects to the inlet of the twenty-first cooling water circulation line 123. The outlet of the twenty-first cooling water circulation line 123 connects to the inlet of the twenty-second cooling water circulation line 124 and the inlet of the seventh waste heat discharge line 157. The outlet of the seventh waste heat discharge line 157 connects to the low-temperature side inlet of the fourth process heat exchanger 7. The low-temperature side outlet of the fourth process heat exchanger 7 connects to the inlet of the eighth waste heat discharge line 158. The outlet of the twenty-second cooling water circulation line 124... The outlet of the 23rd cooling water circulation pipe 125 is connected to the inlet of the 23rd cooling water circulation pipe 125 and the inlet of the 5th waste heat discharge pipe 155, respectively. The outlet of the 5th waste heat discharge pipe 155 is connected to the low-temperature side inlet of the 3rd process heat exchanger 6. The low-temperature side outlet of the 3rd process heat exchanger 6 is connected to the inlet of the 6th waste heat discharge pipe 156. The outlet of the 23rd cooling water circulation pipe 125 is connected to the inlet of the 24th cooling water circulation pipe 126 and the inlet of the 3rd waste heat discharge pipe 153, respectively. The outlet of the 3rd waste heat discharge pipe 153 is connected to the low-temperature side inlet of the 2nd process heat exchanger 5. The low-temperature side outlet of the 2nd process heat exchanger 5 is connected to the inlet of the 4th waste heat discharge pipe 154.The outlet end of the 24th cooling water circulation pipe 126 is connected to the inlet end of the 25th cooling water circulation pipe 127 and the inlet end of the first waste heat discharge pipe 151. The outlet end of the first waste heat discharge pipe 151 is connected to the low-temperature side inlet end of the first process heat exchanger 4. The low-temperature side outlet end of the first process heat exchanger 4 is connected to the inlet end of the second waste heat discharge pipe 152. The outlet end of the 25th cooling water circulation pipe 127 is connected to the inlet end of the 26th cooling water circulation pipe 128 and the inlet end of the fifth exhaust cooling pipe 3-31. The outlet end of the fifth exhaust cooling pipe 3-31 is connected to the low-temperature side inlet end of the third heat pump process heating device 3. The low-temperature side outlet end of the third heat pump process heating device 3 is connected to the inlet end of the sixth exhaust cooling pipe 3-34. The outlet end of the sixth cooling water circulation pipe 128 is connected to the inlet end of the twenty-seventh cooling water circulation pipe 129 and the inlet end of the third row of hot cooling pipes 2-31, respectively. The outlet end of the third row of hot cooling pipes 2-31 is connected to the low-temperature side inlet end of the second heat pump process heating device 2. The low-temperature side outlet end of the second heat pump process heating device 2 is connected to the inlet end of the fourth row of hot cooling pipes 2-34. The outlet end of the twenty-seventh cooling water circulation pipe 129 is connected to the inlet end of the first cooling water circulation pipe 101 and the inlet end of the first row of hot cooling pipes 1-31, respectively. The outlet end of the first row of hot cooling pipes 1-31 is connected to the low-temperature side inlet end of the first heat pump process heating device 1. The low-temperature side outlet end of the first heat pump process heating device 1 is connected to the inlet end of the second row of hot cooling pipes 1-34.

[0068] The first process heat pipe 131 is equipped with a first regulating valve 21; the first waste heat discharge pipe 151 is equipped with a second regulating valve 22; the third process heat pipe 133 is equipped with a third regulating valve 23; the third waste heat discharge pipe 153 is equipped with a fourth regulating valve 24; the fifth process heat pipe 135 is equipped with a fifth regulating valve 25; the fifth waste heat discharge pipe 155 is equipped with a sixth regulating valve 26; the seventh process heat pipe 137 is equipped with a seventh regulating valve 27; the seventh waste heat discharge pipe 157 is equipped with an eighth regulating valve 28; the ninth process heat pipe 139 is equipped with a ninth regulating valve 29; the ninth waste heat discharge pipe 159 is equipped with a tenth regulating valve 30; the eleventh process heat pipe 141 is equipped with an eleventh regulating valve 31; the eleventh waste heat discharge pipe 161 is equipped with a twelfth regulating valve 32; the thirteenth process heat pipe 143 is equipped with a thirteenth regulating valve 33; and the thirteenth waste heat discharge pipe 163 is equipped with a fourteenth regulating valve 34.

[0069] The operating principle of this implementation plan is as follows:

[0070] The high-temperature thermal busbar consists of a supply and return water circulation system composed of high-temperature thermal pipelines, which can achieve supply and return water temperatures of 95℃ / 90℃ through the first circulation pump 35; the medium-temperature thermal busbar consists of a supply and return water circulation system composed of medium-temperature thermal pipelines, which can achieve supply and return water temperatures of 80℃ / 70℃ through the second circulation pump 36; the normal-temperature thermal busbar consists of a supply and return water circulation system composed of normal-temperature thermal pipelines, which can achieve supply and return water temperatures of 60℃ / 50℃ through the third circulation pump 37; the environmental heat source end, composed of cooling water circulation pipelines, is called the cooling water circulation busbar, which can centrally discharge excess waste heat through the cooling tower 16, and achieve supply and return water temperatures of 40℃ / 35℃ through the fourth circulation pump 38; the four sets of circulation busbars are arranged sequentially from top to bottom, which can realize energy cascade utilization and circulation.

[0071] Specifically, the high-temperature heat busbar provides a start-up heat source for the first heat pump process heating unit 1. After startup, the unit operates in self-circulation mode, driving the internal heat pump equipment to meet the process-side heating needs. Excess waste heat is discharged to the cooling water circulation pipeline. In addition to its startup function, the high-temperature heat busbar can also directly supply heat to the process end. It can directly supply hot water at approximately 95°C to the first process heat exchanger 4, the fifth process heat exchanger 8, and the seventh process heat exchanger 10. The return water temperature after heat exchange is approximately 90°C. Excess waste heat from process heat is discharged to the cooling water circulation bus, ambient temperature heat pump bus, and medium temperature heat pump bus to achieve cooling circulation in different temperature ranges. The corresponding first heat pump heat exchanger 11 and fifth heat pump heat exchanger 15 are electrically driven and absorb heat from the circulating water on the medium temperature side and ambient temperature side, respectively. They raise the return water temperature of the high temperature heat pump bus from 90°C to 95°C in a single stage or across two stages to maintain the energy balance of the high temperature heat pump bus. Excess waste heat is discharged across two stages, across a single stage, and adjacent to the corresponding bus to achieve cooling circulation.

[0072] The medium-temperature heat busbar provides a start-up heat source for the second heat pump process heating unit 2. After startup, it drives the internal heat pump equipment to meet the process-side heating needs, completing the self-circulation operation of the unit. Excess waste heat from the process unit is discharged to the cooling water circulation pipeline. In addition to serving as a start-up heat source, the medium-temperature heat busbar can directly supply hot water at around 80°C to the second process heat exchanger 5, the fourth process heat exchanger 7, and the sixth process heat exchanger 9. The return water temperature after heat exchange is around 70°C. Excess waste heat after process heat is discharged to the cooling water circulation busbar and the ambient temperature heat busbar respectively to achieve cooling circulation. The corresponding second heat pump heat exchanger 12 and fourth heat pump heat exchanger 14 are electrically driven, absorbing heat from the circulating water on the ambient temperature side and the cooling side respectively. They raise the return water temperature of the medium-temperature heat busbar from 70°C to 80°C in a single stage or across two stages, thereby maintaining the energy balance of the medium-temperature heat busbar. Excess waste heat is discharged across a single stage and to the corresponding busbar to achieve cooling circulation.

[0073] The ambient temperature heat bus serves as the start-up heat source for the third heat pump process heating device 3. After startup, it drives the internal heat pump equipment to meet the process-side heating needs, completing the self-circulation operation of the device. Excess waste heat from the process device is discharged to the cooling water circulation pipeline. In addition to its startup function, the ambient temperature heat bus can supply hot water at around 60°C to the third process heat exchanger 6. The return water temperature after heat exchange is around 50°C. Correspondingly, the third heat pump heat exchanger 13 is electrically driven and absorbs heat from the 40°C supply water on the lower side, which can raise the return water temperature of the ambient temperature heat bus from 50°C to 60°C, thereby maintaining the energy balance of the ambient temperature heat bus. Excess waste heat after being used by the third process heat exchanger 6 is discharged to the cooling circulation bus to achieve a 35°C / 40°C cooling cycle.

[0074] The entire cycle is based on renewable energy sources, represented by geothermal energy. The low-level heat source heat exchanger 18 enhances the quality of medium-deep geothermal energy and supplies it to the high-temperature thermal bus, providing the necessary basic guarantee for external heat sources.

[0075] Overall, this invention achieves two effects. By setting up a tiered structure of high-temperature, medium-temperature, and ambient-temperature heat pumps and cooling water pumps, combined with electric-driven heat pumps between adjacent pumps, it enhances energy quality and constructs a multi-temperature zone process end system with heating and circulation capabilities of 95℃ / 90℃, 80℃ / 70℃, 60℃ / 50℃, and 40℃ / 35℃. Two process operation modes have been developed: one serving as the start-up heat source for the heat pump process unit, enabling self-circulation operation after startup; and the other directly supplying heat to the process end through the heat pumps at each level. Relying on the temperature enhancement and tiered heat energy utilization of the multi-stage heat pumps, a large amount of waste heat within the system is effectively recovered and recycled.

[0076] This invention utilizes single-stage or dual-stage heat pumps to enhance the energy quality between adjacent and next-next-adjacent busbars, enabling the cross-stage recovery and reuse of process waste heat from different temperature ranges. Waste heat from the process end can be directly discharged to the cooling water circulation busbar, or discharged across single-stage or dual-stage busbars into a lower-level busbar, achieving efficient cascade recovery and recycling of waste heat and significantly improving the overall energy efficiency of the system.

[0077] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A fully electrically driven heating system with an external heat source, characterized in that: It includes a first heat pump process heating device (1), a second heat pump process heating device (2), a third heat pump process heating device (3), a first process heat exchanger (4), a second process heat exchanger (5), a third process heat exchanger (6), a first heat pump heat exchanger (11), a second heat pump heat exchanger (12), a third heat pump heat exchanger (13), a cooling tower (16), a buried pipe (17), a low-level heat source heat exchanger (18), a first regulating valve (21), a second regulating valve (22), a third regulating valve (23), a fourth regulating valve (24), a fifth regulating valve (25), a sixth regulating valve (26), a first circulating pump (35), a second circulating pump (36), a third circulating pump (37), a fourth circulating pump (38), a fifth circulating pump (39), a first high-temperature thermal pipeline (41), a first medium-temperature thermal pipeline (61), a first normal-temperature thermal pipeline (81), and a first cooling water circulating pipeline (101). The outlet end of the first high-temperature heat pipe (41) merges with the heating outlet end of the low-level heat source heat exchanger (18). The merged pipe is then connected to the high-level inlet end of the first heat pump process heating device (1) and the high-temperature side inlet end of the first process heat exchanger (4) in sequence. The connected pipe merges with the high-level outlet end of the first heat pump heat exchanger (11). The merged pipe is equipped with a first circulating pump (35). One branch of the merged pipe is connected to the high-level inlet end of the first heat pump heat exchanger (11). The other branch of the merged pipe is connected to the first process heat exchanger (4) in sequence. The high-temperature inlet end of the process heat exchanger (4) and the high-level outlet end of the first heat pump process heating device (1) converge. One branch of the converged pipeline is connected to the regenerative inlet end of the low-level heat source heat exchanger (18), and the other branch of the converged pipeline is connected to the inlet end of the first high-temperature thermal pipeline (41). The heat extraction outlet end of the low-level heat source heat exchanger (18) is connected to the inlet end of the buried pipe (17), and a fifth circulation pump (39) is installed on the connected pipeline. The outlet end of the buried pipe (17) is connected to the heat extraction inlet end of the low-level heat source heat exchanger (18). The outlet end of the first medium-temperature heating pipeline (61) is connected to the high-level inlet end of the second heat pump process heating device (2), the high-level inlet end of the second process heat exchanger (5), and the low-level inlet end of the first heat pump heat exchanger (11), respectively. The connected pipeline merges with the high-level inlet end of the second heat pump heat exchanger (12). A second circulating pump (36) is installed on the merged pipeline. One branch of the merged pipeline is connected to the high-level inlet end of the second heat pump heat exchanger (12). The other branch of the merged pipeline merges with the low-level outlet end of the first heat pump heat exchanger (11), the high-level outlet end of the second process heat exchanger (5), and the high-level outlet end of the second heat pump process heating device (2) in sequence, and then connects to the inlet end of the first medium-temperature heating pipeline (61). The outlet end of the first ambient temperature heating pipeline (81) is connected to the high-level inlet end of the third heat pump process heating device (3), the high-level inlet end of the third process heat exchanger (6), and the low-level inlet end of the second heat pump heat exchanger (12), respectively. The connected pipeline merges with the outlet end of the third heat pump heat exchanger (13). A third circulating pump (37) is installed on the merged pipeline. One branch of the merged pipeline is connected to the inlet end of the third heat pump heat exchanger (13). The other branch of the merged pipeline merges with the low-level outlet end of the second heat pump heat exchanger (12), the high-level outlet end of the third process heat exchanger (6), and the high-level outlet end of the third heat pump process heating device (3) in sequence, and then connects to the inlet end of the first ambient temperature heating pipeline (81). The outlet end of the first cooling water circulation pipeline (101) is sequentially connected to the low-level outlet end of the first heat pump process heating device (1), the low-level outlet end of the second heat pump process heating device (2), the low-level outlet end of the third heat pump process heating device (3), the wastewater outlet end of the first process heat exchanger (4), the wastewater outlet end of the second process heat exchanger (5), and the wastewater outlet end of the third process heat exchanger (6). The pipeline after the connection is sequentially connected to the low-level inlet end of the third heat pump heat exchanger (13) and the inlet end of the cooling tower (16). The pipeline after the connection is connected to the outlet end of the cooling tower (16), and then the pipeline is connected again. The combined pipeline is equipped with a fourth circulation pump (38). The combined pipeline is connected to the low outlet end of the third heat pump heat exchanger (13). Finally, the combined pipeline is connected to the wastewater inlet end of the third process heat exchanger (6), the wastewater inlet end of the second process heat exchanger (5), the wastewater inlet end of the first process heat exchanger (4), the low inlet end of the third heat pump process heating device (3), the low inlet end of the second heat pump process heating device (2), and the low inlet end of the first heat pump process heating device (1) in sequence. The connected pipeline is connected to the inlet end of the first cooling water circulation pipeline (101).

2. The all-electric driven heating system with an external heat source according to claim 1, characterized in that: The first heat pump process heating device (1), the second heat pump process heating device (2) and the third heat pump process heating device (3) all include a process heat exchanger (1-1), a heat pump heat exchanger (1-2), a first high-temperature side regulating valve (1-11), a second low-temperature side regulating valve (1-14), a high-temperature side circulating pump (1-16) and a low-temperature side circulating pump (1-17). One branch of the high-temperature side outlet of the process heat exchanger (1-1) is connected to the high-temperature side return water pipeline. The other branch of the high-temperature side outlet of the process heat exchanger (1-1) is connected in sequence to the first high-temperature side regulating valve (1-11), the high-temperature side circulating pump (1-16), and the high-level inlet of the heat pump heat exchanger (1-2) to form a high-temperature side water supply circulation. The high-temperature side water supply pipeline is connected to the pipeline connecting the high-level outlet of the heat pump heat exchanger (1-2) and the high-temperature side inlet of the process heat exchanger (1-1). One branch of the low-temperature side inlet of the process heat exchanger (1-1) is connected to the low-temperature side return water pipeline. The other branch of the low-temperature side inlet of the process heat exchanger (1-1) is connected in sequence to the second low-temperature side regulating valve (1-14), the low-position inlet of the heat pump heat exchanger (1-2), and the low-temperature side circulating pump (1-17) to form a low-temperature side water supply circulation. The low-temperature side water supply pipeline is connected to the pipeline that connects the low-temperature side outlet of the process heat exchanger (1-1) to the low-position inlet of the heat pump heat exchanger (1-2).

3. The all-electric driven heating system with an external heat source according to claim 2, characterized in that: It also includes a second high-temperature side regulating valve (1-12), a first low-temperature side regulating valve (1-13), and a third low-temperature side regulating valve (1-15). The second high-temperature side regulating valve (1-12) is installed on the pipeline connecting the high-temperature side water supply pipeline to the high-temperature side water supply circulation pipeline; the first low-temperature side regulating valve (1-13) is installed on the pipeline connecting the low-temperature side water supply circulation pipeline and the low-temperature side water supply pipeline; and the third low-temperature side regulating valve (1-15) is installed on the pipeline connecting the low-temperature side return water pipeline to the low-temperature side water supply circulation pipeline.

4. The all-electric driven heating system with an external heat source according to claim 3, characterized in that: A first regulating valve (21) is provided on the pipeline connected to the high-temperature side inlet of the first process heat exchanger (4), a second regulating valve (22) is provided on the pipeline connected to the low-temperature side inlet of the first process heat exchanger (4), a third regulating valve (23) is provided on the pipeline connected to the high-temperature side inlet of the second process heat exchanger (5), a fourth regulating valve (24) is provided on the pipeline connected to the low-temperature side inlet of the second process heat exchanger (5), a fifth regulating valve (25) is provided on the pipeline connected to the high-temperature side inlet of the third process heat exchanger (6), and a sixth regulating valve (26) is provided on the pipeline connected to the low-temperature side inlet of the third process heat exchanger (6).

5. A fully electrically driven heating system with an external heat source, characterized in that: Includes a first heat pump process heating device (1), a second heat pump process heating device (2), a third heat pump process heating device (3), a first process heat exchanger (4), a second process heat exchanger (5), a third process heat exchanger (6), a fourth process heat exchanger (7), a fifth process heat exchanger (8), a sixth process heat exchanger (9), a seventh process heat exchanger (10), a first heat pump heat exchanger (11), a second heat pump heat exchanger (12), a third heat pump heat exchanger (13), a fourth heat pump heat exchanger (14), a fifth heat pump heat exchanger (15), a cooling tower (16), a buried pipe (17), a low-level heat source heat exchanger (18), a first regulating valve (21), and a second... Regulating valve (22), third regulating valve (23), fourth regulating valve (24), fifth regulating valve (25), sixth regulating valve (26), seventh regulating valve (27), eighth regulating valve (28), ninth regulating valve (29), tenth regulating valve (30), eleventh regulating valve (31), twelfth regulating valve (32), thirteenth regulating valve (33), fourteenth regulating valve (34), first circulating pump (35), second circulating pump (36), third circulating pump (37), fourth circulating pump (38), fifth circulating pump (39), first medium-temperature heat pipe (61), first normal-temperature heat pipe (81) and first cooling water circulating pipe (101). The outlet end of the first high-temperature heat pipe (41) merges with the heating outlet end of the low-level heat source heat exchanger (18) and then sequentially connects to the high-level inlet end of the first heat pump process heating device (1), the high-temperature side inlet end of the first process heat exchanger (4), the high-temperature side inlet end of the fifth process heat exchanger (8), and the high-temperature side inlet end of the seventh process heat exchanger (10). The connected pipe sequentially merges with the high-level outlet end of the first heat pump heat exchanger (11) and the high-level outlet end of the fifth heat pump heat exchanger (15). The pipe after merging is equipped with a first circulation pump (35). The pipe after merging is connected to the high-level inlet end of the fifth heat pump heat exchanger (15) and the high-level inlet end of the first heat pump heat exchanger (11), respectively. The connecting pipelines are sequentially connected to the high-temperature side outlet of the seventh process heat exchanger (10), the high-temperature side outlet of the fifth process heat exchanger (8), the high-temperature side outlet of the first process heat exchanger (4), and the high-level outlet of the first heat pump process heating device (1). Finally, one branch of the combined pipeline is connected to the regenerative inlet of the low-level heat source heat exchanger (18), and the other branch of the combined pipeline is connected to the inlet of the first high-temperature thermal pipeline (41). The heat extraction outlet of the low-level heat source heat exchanger (18) is connected to the inlet of the buried pipe (17), and a fifth circulating pump (39) is installed on the connected pipeline. The outlet of the buried pipe (17) is connected to the heat extraction inlet of the low-level heat source heat exchanger (18). The outlet end of the first medium-temperature heating pipeline (61) is connected to the high-level inlet end of the second heat pump process heating device (2), the high-temperature side inlet end of the second process heat exchanger (5), the high-temperature side inlet end of the fourth process heat exchanger (7), and the high-temperature side inlet end of the sixth process heat exchanger (9), respectively. The connected pipeline merges with the low-temperature side outlet end of the seventh process heat exchanger (10). One branch of the merged pipeline is connected to the low-level inlet end of the first heat pump heat exchanger (11), and the other branch of the merged pipeline is connected in sequence to the high-level outlet end of the second heat pump heat exchanger (12) and the high-level outlet end of the fourth heat pump heat exchanger (14). The pipes merge at the inlet and outlet, and a second circulating pump (36) is installed on the pipes after the second merging. The pipes after the second merging are connected to the high-level inlet of the fourth heat pump heat exchanger (14), the high-level inlet of the second heat pump heat exchanger (12), and the low-temperature side inlet of the seventh process heat exchanger (10). The connected pipes are connected to the high-temperature side outlet of the sixth process heat exchanger (9), the high-temperature side outlet of the fourth process heat exchanger (7), the high-temperature side outlet of the second process heat exchanger (5), and the high-level outlet of the second heat pump process heating device (2) in sequence. Finally, the pipes after the merging are connected to the inlet of the first medium-temperature thermal pipeline (61). The outlet end of the first ambient temperature heat pipe (81) is connected to the high-temperature side inlet end of the third heat pump process heating device (3) and the high-temperature side inlet end of the third process heat exchanger (6), respectively. The connected pipes are connected to the low-temperature side outlet end of the fifth process heat exchanger (8) and the low-temperature side outlet end of the sixth process heat exchanger (9) in sequence. One branch of the connected pipe is connected to the low-level inlet end of the second heat pump heat exchanger (12), and the other branch of the connected pipe is connected to the high-level outlet end of the third heat pump heat exchanger (13). The connected pipes are connected to the low-level inlet end of the fifth heat pump heat exchanger (15). A third circulation pump is installed on the connected pipes. 37), the connected pipeline merges with the low-level outlet end of the fifth heat pump heat exchanger (15), and one branch of the merged pipeline connects to the high-level inlet end of the third heat pump heat exchanger (13). The other branch of the merged pipeline merges with the low-level outlet end of the second heat pump heat exchanger (12) and then connects to the low-temperature side inlet end of the sixth process heat exchanger (9) and the low-temperature side inlet end of the fifth process heat exchanger (8). The connected pipeline merges with the high-temperature side outlet end of the third process heat exchanger (6) and the high-temperature side outlet end of the third heat pump process heating device (3). Finally, the merged pipeline connects to the inlet end of the first ambient temperature thermal pipeline (81). The outlet end of the first cooling water circulation pipeline (101) is sequentially connected to the low-temperature side outlet end of the first heat pump process heating device (1), the low-temperature side outlet end of the second heat pump process heating device (2), the low-temperature side outlet end of the third heat pump process heating device (3), the low-temperature side outlet end of the first process heat exchanger (4), the low-temperature side outlet end of the second process heat exchanger (5), the low-temperature side outlet end of the third process heat exchanger (6), and the low-temperature side outlet end of the fourth process heat exchanger (7). The pipeline after the connection is connected to the low-level inlet end of the third heat pump heat exchanger (13), the low-level inlet end of the fourth heat pump heat exchanger (14), and the inlet end of the cooling tower (16). A fourth circulation pump (38) is installed on the connected pipeline. The connected pipelines are connected in sequence to the outlet end of the cooling tower (16), the low outlet end of the fourth heat pump heat exchanger (14) and the low outlet end of the third heat pump heat exchanger (13). The pipelines after being connected are connected to the low temperature side inlet end of the fourth process heat exchanger (7), the low temperature side inlet end of the third process heat exchanger (6), the low temperature side inlet end of the second process heat exchanger (5), the low temperature side inlet end of the first process heat exchanger (4), the low temperature side inlet end of the third heat pump process heating device (3), the low temperature side inlet end of the second heat pump process heating device (2) and the low temperature side inlet end of the first heat pump process heating device (1). The connected pipelines are connected to the inlet end of the first cooling water circulation pipeline (101).

6. A fully electric driven heating system with an external heat source according to claim 5, characterized in that: The first heat pump process heating device (1), the second heat pump process heating device (2) and the third heat pump process heating device (3) all include a process heat exchanger (1-1), a heat pump heat exchanger (1-2), a first high-temperature side regulating valve (1-11), a second low-temperature side regulating valve (1-14), a high-temperature side circulating pump (1-16) and a low-temperature side circulating pump (1-17). One branch of the high-temperature side outlet of the process heat exchanger (1-1) is connected to the high-temperature side return water pipeline. The other branch of the high-temperature side outlet of the process heat exchanger (1-1) is connected in sequence to the first high-temperature side regulating valve (1-11), the high-temperature side circulating pump (1-16), and the high-level inlet of the heat pump heat exchanger (1-2) to form a high-temperature side water supply circulation. The high-temperature side water supply pipeline is connected to the pipeline connecting the high-level outlet of the heat pump heat exchanger (1-2) and the high-temperature side inlet of the process heat exchanger (1-1). One branch of the low-temperature side inlet of the process heat exchanger (1-1) is connected to the low-temperature side return water pipeline. The other branch of the low-temperature side inlet of the process heat exchanger (1-1) is connected in sequence to the second low-temperature side regulating valve (1-14), the low-position inlet of the heat pump heat exchanger (1-2), and the low-temperature side circulating pump (1-17) to form a low-temperature side water supply circulation. The low-temperature side water supply pipeline is connected to the pipeline that connects the low-temperature side outlet of the process heat exchanger (1-1) to the low-position inlet of the heat pump heat exchanger (1-2).

7. A fully electric driven heating system with an external heat source according to claim 6, characterized in that: It also includes a second high-temperature side regulating valve (1-12), a first low-temperature side regulating valve (1-13), and a third low-temperature side regulating valve (1-15). The second high-temperature side regulating valve (1-12) is installed on the pipeline connecting the high-temperature side water supply pipeline to the high-temperature side water supply circulation pipeline; the first low-temperature side regulating valve (1-13) is installed on the pipeline connecting the low-temperature side water supply circulation pipeline and the low-temperature side water supply pipeline; and the third low-temperature side regulating valve (1-15) is installed on the pipeline connecting the low-temperature side return water pipeline to the low-temperature side water supply circulation pipeline.

8. A fully electric driven heating system with an external heat source according to claim 7, characterized in that: A first regulating valve (21) is provided on the pipe connected to the high-temperature side inlet of the first process heat exchanger (4), a second regulating valve (22) is provided on the pipe connected to the low-temperature side inlet of the first process heat exchanger (4), a third regulating valve (23) is provided on the pipe connected to the high-temperature side inlet of the second process heat exchanger (5), a fourth regulating valve (24) is provided on the pipe connected to the low-temperature side inlet of the second process heat exchanger (5), a fifth regulating valve (25) is provided on the pipe connected to the high-temperature side inlet of the third process heat exchanger (6), a sixth regulating valve (26) is provided on the pipe connected to the low-temperature side inlet of the third process heat exchanger (6), and a seventh regulating valve (27) is provided on the pipe connected to the high-temperature side inlet of the fourth process heat exchanger (7). An eighth regulating valve (28) is provided on the pipe connected to the low-temperature side inlet of the process heat exchanger (7), a ninth regulating valve (29) is provided on the pipe connected to the high-temperature side inlet of the fifth process heat exchanger (8), a tenth regulating valve (30) is provided on the pipe connected to the low-temperature side inlet of the fifth process heat exchanger (8), an eleventh regulating valve (31) is provided on the pipe connected to the high-temperature side inlet of the sixth process heat exchanger (9), a twelfth regulating valve (32) is provided on the pipe connected to the low-temperature side inlet of the sixth process heat exchanger (9), a thirteenth regulating valve (33) is provided on the pipe connected to the high-temperature side inlet of the seventh process heat exchanger (10), and a fourteenth regulating valve (34) is provided on the pipe connected to the low-temperature side inlet of the seventh process heat exchanger (10).

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