A power drive energy recycling system based on stepped energy bus

Abstract

The application provides a power-driven energy circulation system based on a stepped energy bus, and belongs to the field of power-driven heating. In order to solve the problems of the inability of the multi-temperature zone waste heat to be recycled as a whole and the low efficiency of the energy quality improvement of the heat pump in the prior art, the application is characterized in that the high-temperature thermal bus, the medium-temperature thermal bus, the normal-temperature thermal bus and the cooling water bus are arranged in stages, the energy quality is improved by the electrically-driven heat pump between the adjacent buses, the staged heating and closed circulation of the process ends in different temperature zones are realized, a large amount of waste heat is recycled in the system through the three-stage heat pump improvement and stepped utilization, the consumption of high-grade energy is reduced, or the heat can be discharged to the adjacent or next-adjacent low-position bus side through the cross single-stage or double-stage bus, the energy quality is improved between the adjacent buses and the next-adjacent buses by the heat pump device, and the energy is recycled through the temperature improvement of the single-stage or double-stage heat pump.

Description

Technical Field

[0001] This invention relates to the field of electric-driven heating technology, and more specifically, to an electric-driven energy cycle system based on a cascaded energy bus. Background Technology

[0002] In industrial production, heat pump systems are widely used to provide thermal energy support for various process cycles. However, multi-temperature zone industrial heating systems generally suffer from poor coupling between process heat and heat pump supply, and the heat demand of different process zones is provided by their own independent heat sources, lacking a unified energy circulation channel. Due to the differences in the temperature ranges of each process heat application, waste heat between high-temperature, medium-temperature, and normal-temperature zones cannot be directly transferred and recycled, resulting in low-temperature waste heat often being directly discharged into the environment or cooling towers, causing energy waste. Under the current model, heat pumps in each temperature zone typically extract heat from the ambient heat source, lacking energy and mass transfer between them, and cannot flexibly allocate heat according to the overall energy distribution of the system, resulting in low operating efficiency.

[0003] To address the problems of the inability to fully recycle waste heat from multiple temperature zones and the low efficiency of heat pump energy quality improvement in existing technologies, this invention aims to construct an energy circulation system based on a tiered energy bus. By arranging high-temperature, medium-temperature, normal-temperature, and cooling water busbars in a tiered manner, and combining them with an electrically driven heat pump device, energy quality improvement is achieved between adjacent and sub-adjacent busbars, forming a closed loop for process heat in multiple temperature zones. This maximizes the recovery and utilization of process waste heat, improves the overall energy efficiency of the system, reduces primary energy consumption, and achieves the goals of energy conservation and carbon reduction. Summary of the Invention

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

[0005] In order to solve the problems of the inability to recycle waste heat in multiple temperature zones and the low efficiency of heat pump energy quality improvement in existing technologies.

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

[0007] This invention provides an electric drive energy circulation system based on a cascaded energy bus, comprising 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 first circulating pump, a second circulating pump, a third circulating pump, a fourth circulating pump, a first high-temperature thermal pipeline, a first medium-temperature thermal pipeline, a second medium-temperature thermal pipeline, a first ambient-temperature thermal pipeline, a second ambient-temperature thermal pipeline, a first cooling water circulation pipeline, a fourth cooling water circulation pipeline, and a fifth cooling water circulation pipeline.

[0008] In the high-temperature thermal cycle, one branch pipe at the outlet end of the first high-temperature thermal pipeline is connected to the hot water inlet end of the first process heat exchanger. Another branch pipe at the outlet end of the first high-temperature thermal pipeline merges with the high-level outlet end of the first heat pump heat exchanger and then connects to the inlet end of the first circulating pump. A branch pipe at the outlet end of the first circulating pump is connected to the high-level inlet end of the first heat pump heat exchanger. Another branch pipe at the outlet end of the first circulating pump merges with the hot water outlet end of the first process heat exchanger and then connects to the inlet end of the first high-temperature thermal pipeline.

[0009] In the intermediate-temperature thermal cycle, one branch pipe at the outlet end of the first intermediate-temperature thermal pipeline is connected to the hot water inlet end of the second process heat exchanger; another branch pipe at the outlet end of the first intermediate-temperature thermal pipeline is connected to the inlet end of the second intermediate-temperature thermal pipeline; one branch pipe at the outlet end of the second intermediate-temperature thermal pipeline is connected to the low-side inlet end of the first heat pump heat exchanger; another branch pipe at the outlet end of the second intermediate-temperature thermal pipeline merges with the high-side outlet end of the second heat pump heat exchanger and connects to the inlet end of the second circulating pump; one branch pipe at the outlet end of the second circulating pump is connected to the high-side inlet end of the second heat pump heat exchanger; and another branch pipe at the outlet end of the second circulating pump sequentially merges with the low-side outlet end of the first heat pump heat exchanger and the hot water outlet end of the second process heat exchanger before connecting to the inlet end of the first intermediate-temperature thermal pipeline.

[0010] In the ambient temperature thermal cycle, one branch pipe at the outlet end of the first ambient temperature thermal pipeline is connected to the hot water inlet of the third process heat exchanger; another branch pipe at the outlet end of the first ambient temperature thermal pipeline is connected to the inlet of the second ambient temperature thermal pipeline; one branch pipe at the outlet end of the second ambient temperature thermal pipeline is connected to the low-side inlet of the second heat pump heat exchanger; another branch pipe at the outlet end of the second ambient temperature thermal pipeline merges with the high-side outlet of the third heat pump heat exchanger and then connects to the inlet of the third circulating pump; one branch pipe at the outlet end of the third circulating pump is connected to the high-side inlet of the third heat pump heat exchanger; and another branch pipe at the outlet end of the third circulating pump sequentially merges with the hot water outlet of the third process heat exchanger and the low-side outlet of the second heat pump heat exchanger before connecting to the inlet of the first ambient temperature thermal pipeline.

[0011] In the cooling water circulation, the outlet end of the first cooling water circulation pipeline connects sequentially with the wastewater outlet ends of the first, second, and third process heat exchangers, and then connects to the inlet end of the fourth cooling water circulation pipeline. One branch pipe at the outlet end of the fourth cooling water circulation pipeline connects to the low-side inlet end of the third heat pump heat exchanger. Another branch pipe at the outlet end of the fourth cooling water circulation pipeline connects to the inlet end of the fifth cooling water circulation pipeline. The outlet end of the fifth cooling water circulation pipeline connects to the inlet end of the fourth circulation pump after flowing through the cooling tower via a branch pipe. The outlet end of the fourth circulation pump connects with the low-side outlet end of the third heat pump heat exchanger. The connecting pipe connects sequentially with the wastewater inlet ends of the third, second, and first process heat exchangers, and finally connects to the inlet end of the first cooling water circulation pipeline.

[0012] Furthermore, a first regulating valve is provided on the pipe connected to the hot water inlet of the first process heat exchanger, a second regulating valve is provided on the pipe connected to the waste water inlet of the first process heat exchanger, a third regulating valve is provided on the pipe connected to the hot water inlet of the second process heat exchanger, a fourth regulating valve is provided on the pipe connected to the waste water inlet of the second process heat exchanger, a fifth regulating valve is provided on the pipe connected to the hot water inlet of the third process heat exchanger, and a sixth regulating valve is provided on the pipe connected to the waste water inlet of the third process heat exchanger.

[0013] A power-driven energy cycle system based on a cascaded energy bus includes 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 first high-temperature thermal pipeline, a first medium-temperature thermal pipeline, a first ambient-temperature thermal pipeline, and a first cooling water circulation pipeline.

[0014] In the high-temperature thermal cycle, the outlet end of the first high-temperature thermal pipeline is sequentially connected to the hot water inlet ends of the first, fifth, and seventh process heat exchangers. After connection, the pipeline sequentially merges with the high-level outlet ends of the first and fifth heat pump heat exchangers. The merged pipeline then connects to the inlet end of the first circulating pump. The outlet end of the first circulating pump is sequentially connected to the high-level outlet ends of the fifth and first heat pump heat exchangers. This connected pipeline then sequentially merges with the hot water outlet ends of the seventh, fifth, and first process heat exchangers. Finally, the merged pipeline connects to the inlet end of the first high-temperature thermal pipeline.

[0015] In the intermediate-temperature thermal cycle, the outlet end of the first intermediate-temperature thermal pipeline is sequentially connected to the hot water inlet ends of the second, fourth, and sixth process heat exchangers. This connected pipeline then merges with the wastewater inlet end of the seventh process heat exchanger. The merged pipeline then connects to the low-level inlet end of the first heat pump heat exchanger. This connected pipeline then sequentially merges with the high-level outlet ends of the second and fourth heat pump heat exchangers. This merged pipeline then connects to the inlet end of the second circulation pump. The outlet end of the second circulation pump is sequentially connected to the high-level inlet ends of the fourth and second heat pump heat exchangers. This connected pipeline then sequentially merges with the hot water outlet ends of the sixth, fourth, and second process heat exchangers. Finally, the merged pipeline connects to the inlet end of the first intermediate-temperature thermal pipeline.

[0016] In the low-temperature thermodynamic cycle, one branch pipe at the outlet of the first ambient temperature heat exchanger connects to the hot water inlet of the third process heat exchanger. Another branch pipe at the outlet of the first ambient temperature heat exchanger successively merges with the wastewater outlets of the fifth and sixth process heat exchangers. One branch pipe of this merged pipe connects to the low-side inlet of the second heat pump heat exchanger. Another branch pipe of this merged pipe merges with the high-side outlet of the third heat pump heat exchanger. A third branch pipe of this merged pipe connects to the low-side inlet of the fifth heat pump heat exchanger. After this final merge... Another branch of the pipeline connects to the inlet of the third circulating pump. The outlet of the third circulating pump merges with the low-side outlet of the fifth heat pump heat exchanger. A branch of this merged pipeline connects to the high-side inlet of the third heat pump heat exchanger. Another branch of this merged pipeline connects to the low-side outlet of the second heat pump heat exchanger. This merged pipeline then connects sequentially to the wastewater inlet of the sixth and fifth process heat exchangers. Finally, this connected pipeline merges with the hot water outlet of the third process heat exchanger and connects to the inlet of the first ambient temperature heating pipeline.

[0017] In the cooling water circulation, the outlet end of the first cooling water circulation pipeline sequentially merges with the waste hot water outlet ends of the first, second, third, and fourth process heat exchangers. The merged pipeline then sequentially connects to the low-level inlet end of the third and fourth heat pump heat exchangers and the inlet end of the cooling tower. The connected pipeline then connects to the inlet end of the fourth circulation pump. The outlet end of the fourth circulation pump sequentially merges with the outlet end of the cooling tower, the low-level outlet end of the fourth and third heat pump heat exchangers, and the low-level outlet end of the third heat pump heat exchanger. Finally, the merged pipeline sequentially connects to the waste hot water inlet ends of the fourth, third, second, and first process heat exchangers. The connected pipeline then finally connects to the inlet end of the first cooling water circulation pipeline.

[0018] Furthermore, a first regulating valve is installed on the pipe connected to the hot water inlet of the first process heat exchanger; a second regulating valve is installed on the pipe connected to the waste water inlet of the first process heat exchanger; a third regulating valve is installed on the pipe connected to the hot water inlet of the second process heat exchanger; a fourth regulating valve is installed on the pipe connected to the waste water inlet of the second process heat exchanger; a fifth regulating valve is installed on the pipe connected to the hot water inlet of the third process heat exchanger; a sixth regulating valve is installed on the pipe connected to the waste water inlet of the third process heat exchanger; and a seventh regulating valve is installed on the pipe connected to the hot water inlet of the fourth process heat exchanger. An eighth regulating valve is installed on the pipe connected to the waste hot water inlet of the fourth process heat exchanger; a ninth regulating valve is installed on the pipe connected to the hot water inlet of the fifth process heat exchanger; a tenth regulating valve is installed on the pipe connected to the waste hot water inlet of the fifth process heat exchanger; an eleventh regulating valve is installed on the pipe connected to the hot water inlet of the sixth process heat exchanger; a twelfth regulating valve is installed on the pipe connected to the waste hot water inlet of the sixth process heat exchanger; a thirteenth regulating valve is installed on the pipe connected to the hot water inlet of the seventh process heat exchanger; and a fourteenth regulating valve is installed on the pipe connected to the waste hot water inlet of the seventh process heat exchanger.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] (1) This invention achieves graded heating and closed-loop circulation at different temperature zones by arranging high-temperature heating busbars, medium-temperature heating busbars, normal-temperature heating busbars, and cooling water busbars in a tiered manner, combined with electric-driven heat pumps between adjacent busbars to improve energy quality. Compared with existing single heating methods, this structure can simultaneously meet the heating needs of multiple temperature zones within the same system, significantly improving the tiered utilization rate of energy and the overall energy efficiency of the system.

[0021] (2) The external input of the system is only the electrical energy to drive the heat pump cycle. The required heat depends on the waste heat of the process recovered in stages. Through multi-stage heat pump boosting and cascade utilization, a large amount of waste heat is recovered and reused in the system, which significantly reduces the consumption of primary high-grade energy such as gas boilers or centralized heating, and at the same time significantly reduces the heat discharged to the cooling tower, thus reducing environmental heat emissions.

[0022] (3) The waste heat after heat exchange at each temperature zone process end is uniformly collected into the cooling water bus via waste heat discharge pipeline, and then the next stage heat pump gradually increases the temperature to replenish the previous stage heat bus, realizing full-chain waste heat recovery within a large temperature range of 35℃~95℃. At the same time, the cascade bus layout and the zoned control mode of the circulating pump can simultaneously meet the heat demand of different process ends at high temperature, medium temperature and normal temperature, improving the system applicability and energy utilization rate.

[0023] (4) By using cross-stage waste heat transfer and cross-stage heat pump heating, the supply and return water temperature and flow rate can be independently adjusted according to the changes in each process load. When the load in a local temperature zone suddenly increases or the load in another temperature zone decreases, heat balance across zones can be achieved, which significantly improves the system's adaptability and operational stability to multiple types and multiple fluctuating load conditions. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of an electric drive energy cycle system based on a cascaded energy bus in an embodiment of the present invention. Figure 1 ;

[0025] Figure 2 This is a schematic diagram of the structure of an electric drive energy cycle system based on a cascaded energy bus in an embodiment of the present invention. Figure 2 .

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. First process heat exchanger; 2. Second process heat exchanger; 3. Third process heat exchanger; 4. Fourth process heat exchanger; 5. Fifth process heat exchanger; 6. Sixth process heat exchanger; 7. Seventh process heat exchanger; 8. First heat pump heat exchanger; 9. Second heat pump heat exchanger; 10. Third heat pump heat exchanger; 11. Fourth heat pump heat exchanger; 12. Fifth heat pump heat exchanger; 13. Cooling tower; 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; 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; 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. First medium-temperature heating pipeline; 52. Second medium-temperature heating pipeline; 53. Third medium-temperature heating pipeline; 54. Fourth medium-temperature heating pipeline; 55. Fifth medium-temperature heating pipeline; 56. Sixth medium-temperature heating pipeline; 57. Seventh medium-temperature heating pipeline; Heat supply piping; 58. Eighth intermediate temperature heat supply piping; 59. Ninth intermediate temperature heat supply piping; 60. Tenth intermediate temperature heat supply piping; 61. Eleventh intermediate temperature heat supply piping; 62. Twelfth intermediate temperature heat supply piping; 63. Thirteenth intermediate temperature heat supply piping; 71. First ambient temperature heat supply piping; 72. Second ambient temperature heat supply piping; 73. Third ambient temperature heat supply piping; 74. Fourth ambient temperature heat supply piping; 75. Fifth ambient temperature heat supply piping; 76. Sixth ambient temperature heat supply piping; 77. Seventh ambient temperature heat supply piping; 78. Eighth ambient temperature heat supply piping; 79. Ninth ambient temperature heat supply piping; 80. Tenth ambient temperature heat supply piping; 81. Eleventh ambient temperature heat supply piping; 91. First cooling water circulation piping; 92. Second cooling water circulation piping; 93. Third cooling water circulation piping; Circulation piping; 94. Fourth cooling water circulation piping; 95. Fifth cooling water circulation piping; 96. Sixth cooling water circulation piping; 97. Seventh cooling water circulation piping; 98. Eighth cooling water circulation piping; 99. Ninth cooling water circulation piping; 100. Tenth cooling water circulation piping; 101. Eleventh cooling water circulation piping; 102. Twelfth cooling water circulation piping; 103. Thirteenth cooling water circulation piping; 104. Fourteenth cooling water circulation piping; 111. First process heat piping; 112. Second process heat piping; 113. Third process heat piping; 114. Fourth process heat piping; 115. Fifth process heat piping; 116. Sixth process heat piping; 117. Seventh process heat piping;118. Heat pipes for the eighth process; 119. Heat pipes for the ninth process; 120. Heat pipes for the tenth process; 121. Heat pipes for the eleventh process; 122. Heat pipes for the twelfth process; 123. Heat pipes for the thirteenth process; 124. Heat pipes for the fourteenth process; 131. First waste heat discharge pipe; 132. Second waste heat discharge pipe; 133. Third waste heat discharge pipe; 134. Fourth waste heat discharge pipe; 135. Fifth waste heat discharge pipe; 136. Sixth waste heat discharge pipe; 137. Seventh waste heat discharge pipe; 13 8. Eighth waste heat discharge pipeline; 139. Ninth waste heat discharge pipeline; 140. Tenth waste heat discharge pipeline; 141. Eleventh waste heat discharge pipeline; 142. Twelfth waste heat discharge pipeline; 143. Thirteenth waste heat discharge pipeline; 144. Fourteenth waste heat discharge pipeline; 151. First high-temperature heating pipeline; 152. Second high-temperature heating pipeline; 153. Third high-temperature heating pipeline; 154. Fourth high-temperature heating pipeline; 155. Fifth high-temperature heating pipeline; 156. Sixth high-temperature heating pipeline; 157. Seventh high-temperature heating pipeline; 158. 159. Eighth high-temperature heating pipeline; 160. Ninth high-temperature heating pipeline; 161. Tenth high-temperature heating pipeline; 162. First low-temperature heat source pipeline; 163. Second low-temperature heat source pipeline; 164. Third low-temperature heat source pipeline; 165. Fourth low-temperature heat source pipeline; 166. Fifth low-temperature heat source pipeline; 167. Sixth low-temperature heat source pipeline; 168. Seventh low-temperature heat source pipeline; 169. Eighth low-temperature heat source pipeline; 170. Ninth low-temperature heat source pipeline; 171. Tenth low-temperature heat source pipeline; 172. First cooling water pipeline; 173. Second cooling water pipeline; 173. Eleventh High-Temperature Heat Pipeline; 174. Twelfth High-Temperature Heat Pipeline; 175. Fourteenth Medium-Temperature Heat Pipeline; 176. Fifteenth Medium-Temperature Heat Pipeline; 177. Twelfth Normal-Temperature Heat Pipeline; 178. Thirteenth Normal-Temperature Heat Pipeline; 179. Fourteenth Normal-Temperature Heat Pipeline; 180. Fifteenth Cooling Water Circulation Pipeline; 181. Sixteenth Cooling Water Circulation Pipeline; 182. Seventeenth Cooling Water Circulation Pipeline; 183. Eighteenth Cooling Water Circulation Pipeline; 184. Nineteenth Cooling Water Circulation Pipeline; 185. Twentieth Cooling Water Circulation Pipeline. Detailed Implementation

[0028] 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.

[0029] 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.

[0030] 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.

[0031] Specific Implementation Plan 1: Combining Figure 1As shown, this invention provides an electric drive energy circulation system based on a cascaded energy bus, including a first process heat exchanger 1, a second process heat exchanger 2, a third process heat exchanger 3, a first heat pump heat exchanger 8, a second heat pump heat exchanger 9, a third heat pump heat exchanger 10, a cooling tower 13, 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 first high-temperature heat pipe 41, a second high-temperature heat pipe 42, and a third high-temperature heat pipe 43. 42. High-temperature heating pipe 43. High-temperature heating pipe 44. First medium-temperature heating pipe 51. Second medium-temperature heating pipe 52. Third medium-temperature heating pipe 53. Fourth medium-temperature heating pipe 54. Fifth medium-temperature heating pipe 55. First ambient temperature heating pipe 71. Second ambient temperature heating pipe 72. Third ambient temperature heating pipe 73. Fourth ambient temperature heating pipe 74. Fifth ambient temperature heating pipe 75. First cooling water circulation pipe 91. Second cooling water circulation pipe 92. Third cooling water circulation pipe 93. Fourth cooling water circulation pipe 94. Fifth cooling water circulation pipe Water circulation pipeline 95, sixth cooling water circulation pipeline 96, seventh cooling water circulation pipeline 97, eighth cooling water circulation pipeline 98, ninth cooling water circulation pipeline 99, tenth cooling water circulation pipeline 100, first process heat pipe 111, second process heat pipe 112, third process heat pipe 113, fourth process heat pipe 114, fifth process heat pipe 115, sixth process heat pipe 116, first waste heat discharge pipeline 131, second waste heat discharge pipeline 132, third waste heat discharge pipeline 133, fourth waste heat discharge pipeline 134. Fifth waste heat discharge pipeline 135, sixth waste heat discharge pipeline 136, first high-temperature heating pipeline 151, second high-temperature heating pipeline 152, third high-temperature heating pipeline 153, fourth high-temperature heating pipeline 154, fifth high-temperature heating pipeline 155, sixth high-temperature heating pipeline 156, first low-temperature heat source pipeline 161, second low-temperature heat source pipeline 162, third low-temperature heat source pipeline 163, fourth low-temperature heat source pipeline 164, fifth low-temperature heat source pipeline 165, sixth low-temperature heat source pipeline 166, first cooling water pipeline 171 and second cooling water pipeline 172,

[0032] The outlet end of the first high-temperature heating pipe 41 is connected to the inlet end of the second high-temperature heating pipe 42 and the inlet end of the first process heating pipe 111. The first process heating pipe 111 is equipped with a first regulating valve 21. The outlet end of the first process heating pipe 111 is connected to the hot water inlet end of the first process heat exchanger 1. The hot water outlet end of the first process heat exchanger 1 is connected to the inlet end of the second process heating pipe 112. The outlet end of the second high-temperature heating pipe 42 merges with the outlet end of the second high-temperature heating pipe 152 and then connects to the inlet end of the third high-temperature heating pipe 43. A first circulating pump 35 is installed on the third high-temperature heating pipeline 43. 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 high-temperature heating pipeline 151. The outlet end of the first high-temperature heating pipeline 151 is connected to the high-level inlet end of the first heat pump heat exchanger 8. The high-level outlet end of the first heat pump heat exchanger 8 is connected to the inlet end of the second high-temperature heating pipeline 152. The outlet end of the fourth high-temperature heating pipeline 44 merges with the outlet end of the second process heating pipeline 112 and then connects to the inlet end of the first high-temperature heating pipeline 41.

[0033] The outlet end of the first intermediate-temperature heating pipe 51 is connected to the inlet end of the second intermediate-temperature heating pipe 52 and the inlet end of the third process heating pipe 113. The third process heating pipe 113 is equipped with a third regulating valve 23. The outlet end of the third process heating pipe 113 is connected to the hot water inlet end of the second process heat exchanger 2. The hot water outlet end of the second process heat exchanger 2 is connected to the inlet end of the fourth process heating pipe 114. The outlet end of the second intermediate-temperature heating pipe 52 is connected to the inlet end of the third intermediate-temperature heating pipe 53 and the inlet end of the first low-level heat source pipe 161. The outlet end of the first low-level heat source pipe 161 is connected to the low-level inlet end of the first heat pump heat exchanger 8. The low-level outlet end of the first heat pump heat exchanger 8 is connected to the inlet end of the second low-level heat source pipe 162. The outlet end of the third intermediate-temperature heating pipe 53... After merging with the outlet end of the fourth high-temperature heating pipeline 154, it connects to the inlet end of the fourth medium-temperature heating pipeline 54. The fourth medium-temperature heating pipeline 54 is equipped with a second circulating pump 36. One branch of the outlet end of the fourth medium-temperature heating pipeline 54 merges with the outlet end of the second low-level heat source pipeline 162 and connects to the inlet end of the fifth medium-temperature heating pipeline 55. Another branch of the outlet end of the fourth medium-temperature heating pipeline 54 connects to the inlet end of the third high-temperature heating pipeline 153. The outlet end of the third high-temperature heating pipeline 153 connects to the high-level inlet end of the second heat pump heat exchanger 9. The high-level outlet end of the second heat pump heat exchanger 9 connects to the inlet end of the fourth high-temperature heating pipeline 154. The outlet end of the fifth medium-temperature heating pipeline 55 merges with the outlet end of the fourth process heat pipeline 114 and connects to the inlet end of the first medium-temperature heating pipeline 51.

[0034] The outlet end of the first ambient temperature heating pipe 71 is connected to the inlet end of the second ambient temperature heating pipe 72 and the inlet end of the fifth process heating pipe 115. The fifth process heating pipe 115 is equipped with a fifth regulating valve 25. The outlet end of the fifth process heating pipe 115 is connected to the hot water inlet end of the third process heat exchanger 3. The hot water outlet end of the third process heat exchanger 3 is connected to the inlet end of the sixth process heating pipe 116. The outlet end of the second ambient temperature heating pipe 72 is connected to the inlet end of the third ambient temperature heating pipe 73 and the inlet end of the third low-level heat source pipe 163. The outlet end of the third low-level heat source pipe 163 is connected to the low-level inlet end of the second heat pump heat exchanger 9. The low-level outlet end of the second heat pump heat exchanger 9 is connected to the inlet end of the fourth low-level heat source pipe 164. The outlet end of the third ambient temperature heating pipe 73 is connected to... The outlet end of the sixth high-temperature heating pipeline 156 merges with the inlet end of the fourth ambient temperature heating pipeline 74. The fourth ambient temperature heating pipeline 74 is equipped with a third circulating pump 37. One branch of the outlet end of the fourth ambient temperature heating pipeline 74 merges with the outlet end of the fourth low-temperature heat source pipeline 164 and then connects to the inlet end of the fifth ambient temperature heating pipeline 75. Another branch of the outlet end of the fourth ambient temperature heating pipeline 74 connects to the inlet end of the fifth high-temperature heating pipeline 155. The outlet end of the fifth high-temperature heating pipeline 155 connects to the high-level inlet end of the third heat pump heat exchanger 10. The high-level outlet end of the third heat pump heat exchanger 10 connects to the inlet end of the sixth high-temperature heating pipeline 156. The outlet end of the fifth ambient temperature heating pipeline 75 merges with the outlet end of the sixth process heat pipeline 116 and then connects to the inlet end of the first ambient temperature heating pipeline 71.

[0035] The outlet end of the first cooling water circulation pipe 91 merges with the outlet end of the second waste heat discharge pipe 132 and then connects to the inlet end of the second cooling water circulation pipe 92. The outlet end of the second cooling water circulation pipe 92 merges with the outlet end of the fourth waste heat discharge pipe 134 and then connects to the inlet end of the third cooling water circulation pipe 93. The outlet end of the third cooling water circulation pipe 93 merges with the outlet end of the sixth waste heat discharge pipe 136 and then connects to the inlet end of the fourth cooling water circulation pipe 94. The outlet end of the fourth cooling water circulation pipe 94 connects to the inlet end of the fifth cooling water circulation pipe 95 and the inlet end of the fifth low-level heat source pipe 165, respectively. The outlet end of the fifth low-level heat source pipe 165 connects to the third heat pump heat exchanger 1. The low-side inlet end of the 0 is connected, the low-side outlet end of the third heat pump heat exchanger 10 is connected to the inlet end of the sixth low-side heat source pipeline 166, the outlet end of the fifth cooling water circulation pipeline 95 is connected to the inlet end of the sixth cooling water circulation pipeline 96 and the inlet end of the first cooling water pipeline 171, the outlet end of the first cooling water pipeline 171 is connected to the inlet end of the cooling tower 13, the outlet end of the cooling tower 13 is connected to the inlet end of the second cooling water pipeline 172, the sixth cooling water circulation pipeline 96 is equipped with a fourth circulation pump 38, the outlet end of the sixth cooling water circulation pipeline 96 and the outlet end of the second cooling water pipeline 172 merge and are connected to the inlet end of the seventh cooling water circulation pipeline 97, the seventh cooling water circulation pipeline 97... The outlet of pipe 7 merges with the outlet of the sixth low-level heat source pipe 166 and then connects to the inlet of the eighth cooling water circulation pipe 98. The outlet of the eighth cooling water circulation pipe 98 is connected to the inlet of the ninth cooling water circulation pipe 99 and the inlet of the fifth waste heat discharge pipe 135. The fifth waste heat discharge pipe 135 is equipped with a sixth regulating valve 26. The outlet of the fifth waste heat discharge pipe 135 is connected to the waste hot water inlet of the third process heat exchanger 3. The waste hot water outlet of the third process heat exchanger 3 is connected to the inlet of the sixth waste heat discharge pipe 136. The outlet of the ninth cooling water circulation pipe 99 is connected to the inlet of the tenth cooling water circulation pipe 100 and the inlet of the third waste heat discharge pipe 133. The third waste heat discharge pipeline 133 is equipped with a fourth regulating valve 24. The outlet end of the third waste heat discharge pipeline 133 is connected to the waste hot water inlet end of the second process heat exchanger 2. The waste hot water outlet end of the second process heat exchanger 2 is connected to the inlet end of the fourth waste heat discharge pipeline 134. The outlet end of the tenth cooling water circulation pipeline 100 is connected to the inlet end of the first cooling water circulation pipeline 91 and the inlet end of the first waste heat discharge pipeline 131 respectively. The first waste heat discharge pipeline 131 is equipped with a second regulating valve 22. The outlet end of the first waste heat discharge pipeline 131 is connected to the waste hot water inlet end of the first process heat exchanger 1. The waste hot water outlet end of the first process heat exchanger 1 is connected to the inlet end of the second waste heat discharge pipeline 132.

[0036] The operating principle of the implementation plan:

[0037] 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 13, 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.

[0038] Specifically, the high-temperature heat bus can supply 95°C hot water to the first process heat exchanger 1 (high-temperature zone process end) through the first process heat pipe 111 and the second process heat pipe 112. The return water temperature after heat exchange is 90°C. The corresponding first heat pump heat exchanger 8 is electrically driven and absorbs the heat of the 80°C supply water on the low side through the first low-level heat source pipe 161 and the second low-level heat source pipe 162, which can raise the return water temperature of the high-temperature heat bus from 90°C to 95°C, thereby maintaining the energy input and output balance of the high-temperature heat bus. The excess waste heat after being used by the first process heat exchanger 1 achieves a 35°C / 40°C cooling cycle through the first waste heat discharge pipe 131 and the second waste heat discharge pipe 132.

[0039] The medium-temperature heat exchanger can supply 80°C hot water to the second process heat exchanger 2 (medium-temperature zone process end) through the third process heat pipe 113 and the fourth process heat pipe 114. The return water temperature after heat exchange is 70°C. The corresponding second heat pump heat exchanger 9 is electrically driven and absorbs the heat of the 60°C supply water on the low side through the third low-level heat source pipe 163 and the fourth low-level heat source pipe 164, which can raise the return water temperature of the medium-temperature heat exchanger from 70°C to 80°C, thereby maintaining the energy balance of the medium-temperature heat exchanger. The excess waste heat after being used by the second process heat exchanger 2 achieves a 35°C / 40°C cooling cycle through the third waste heat discharge pipe 133 and the fourth waste heat discharge pipe 134.

[0040] The ambient temperature heat exchanger can supply 60°C hot water to the third process heat exchanger 3 (ambient temperature zone process end) through the fifth process heat pipe 115 and the sixth process heat pipe 116. The return water temperature after heat exchange is 50°C. The corresponding third heat pump heat exchanger 10 is electrically driven and absorbs the heat of the 40°C supply water on the low side through the fifth low-level heat source pipe 165 and the sixth low-level heat source pipe 166, which can raise the return water temperature of the ambient temperature heat exchanger from 50°C to 60°C, thereby maintaining the energy balance of the ambient temperature heat exchanger. The excess waste heat after being used by the third process heat exchanger 3 achieves a 35°C / 40°C cooling cycle through the fifth waste heat discharge pipe 135 and the sixth waste heat discharge pipe 136.

[0041] Overall, two effects were achieved: the high-temperature, medium-temperature, and normal-temperature thermal busbars provide heat sources of 95℃, 80℃, and 60℃ respectively for the process ends at different temperature ranges, improving the adaptability of process heat; for waste heat at the end of the process, it is uniformly collected into the cooling water busbar through the waste heat discharge pipeline, realizing full-chain waste heat recovery within a large temperature range of 35℃~95℃; through multi-stage heat pump enhancement, a large amount of waste heat is recovered and reused within the system, significantly improving the cascade utilization rate of energy and the overall energy efficiency of the system.

[0042] In the entire circulation system, the only external input is the electrical energy driving the heat pump cycle, and excess heat is discharged through the cooling tower. The bus layout and zoned control of the circulating pumps allow for independent adjustment of the supply and return water temperature and flow rate in each temperature zone, simultaneously meeting the heat demands of different process ends at high, medium, and normal temperatures, making it highly adaptable. All waste heat from the end of the heat-using process is discharged to the cooling water circulation bus, and the heat pump units achieve energy quality enhancement between adjacent busbars. Through the temperature enhancement of the three-stage heat pump, energy recycling is achieved.

[0043] Specific Implementation Plan Two: Combining Figure 2As shown, the present invention provides a power-driven energy recycling system based on a cascaded energy bus, including a first process heat exchanger 1, a second process heat exchanger 2, a third process heat exchanger 3, a fourth process heat exchanger 4, a fifth process heat exchanger 5, a sixth process heat exchanger 6, a seventh process heat exchanger 7, a first heat pump heat exchanger 8, a second heat pump heat exchanger 9, a third heat pump heat exchanger 10, a fourth heat pump heat exchanger 11, a fifth heat pump heat exchanger 12, a cooling tower 13, 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 seventh regulating valve 27, an eighth regulating valve 28, a ninth regulating valve 29, a tenth regulating valve 30, an eleventh regulating valve 31, a twelfth regulating valve 32, a thirteenth regulating valve 33, a fourteenth regulating valve 34, a first circulation pump 35, a second circulation pump 36, a third circulation pump 37, a fourth circulation pump 38, a first high-temperature heat pipeline 41, a second high-temperature heat pipeline 42, a fifth high-temperature heat pipeline 45, a sixth high-temperature heat pipeline 46, a seventh high-temperature heat pipeline 47, an eighth high-temperature heat pipeline 48, a ninth high-temperature heat pipeline 49, a tenth high-temperature heat pipeline 50, a first medium-temperature heat pipeline 51, a second medium-temperature heat pipeline 52, a third medium-temperature heat pipeline 53, a sixth medium-temperature heat pipeline 56, a seventh medium-temperature heat pipeline 57, an eighth medium-temperature heat pipeline 58, a ninth medium-temperature heat pipeline 59, a tenth medium-temperature heat pipeline 60, an eleventh medium-temperature heat pipeline 61, a twelfth medium-temperature heat pipeline 62, a thirteenth medium-temperature heat pipeline 63, a first normal-temperature heat pipeline 71, a second normal-temperature heat pipeline 72, a sixth normal-temperature heat pipeline 76, a seventh normal-temperature heat pipeline 77, an eighth normal-temperature heat pipeline 78, a ninth normal-temperature heat pipeline 79, a tenth normal-temperature heat pipeline 80, an eleventh normal-temperature heat pipeline 81, a first cooling water circulation pipeline 91, a second cooling water circulation pipeline 92, a third cooling water circulation pipeline 93, a fourth cooling water circulation pipeline 94, an eleventh cooling water circulation pipeline 101, a twelfth cooling water circulation pipeline 102, a thirteenth cooling water circulation pipeline 103, a fourteenth cooling water circulation pipeline 104, a first process heat-using pipeline 111, a second process heat-using pipeline 112, a third process heat-using pipeline 113, a fourth process heat-using pipeline 114, a fifth process heat-using pipeline 115, a sixth process heat-using pipeline 116, a seventh process heat-using pipeline 117, an eighth process heat-using pipeline 118, a ninth process heat-using pipeline 119, a tenth process heat-using pipeline 120, an eleventh process heat-using pipeline 121, a twelfth process heat-using pipeline 122, a thirteenth process heat-using pipeline 123, a fourteenth process heat-using pipeline 124, a first waste heat discharge pipeline 131, a second waste heat discharge pipeline 132, a third waste heat discharge pipeline 133, a fourth waste heat discharge pipeline 134, a fifth waste heat discharge pipeline 135, a sixth waste heat discharge pipeline 136, a seventh waste heat discharge pipeline 137, an eighth waste heat discharge pipeline 138, a ninth waste heat discharge pipeline 139, a tenth waste heat discharge pipeline 140Eleventh waste heat discharge pipeline 141, Twelfth waste heat discharge pipeline 142, Thirteenth waste heat discharge pipeline 143, Fourteenth waste heat discharge pipeline 144, First high-temperature heating pipeline 151, Second high-temperature heating pipeline 152, Third high-temperature heating pipeline 153, Fourth high-temperature heating pipeline 154, Fifth high-temperature heating pipeline 155, Sixth high-temperature heating pipeline 156, Seventh high-temperature heating pipeline 157, Eighth high-temperature heating pipeline 158, Ninth high-temperature heating pipeline 159, Tenth high-temperature heating pipeline 160, First low-temperature heat source pipeline 161, Second low-temperature heat source pipeline 162, Third low-temperature heat source pipeline 163, Fourth low-temperature heat source pipeline 164, Fifth low-temperature heat source pipeline 165, Sixth low-temperature heat source pipeline 166 7. Low-temperature heat source pipeline 167, 8. Low-temperature heat source pipeline 168, 9. Low-temperature heat source pipeline 169, 10. Low-temperature heat source pipeline 170, 11. Cooling water pipeline 171, 2. Cooling water pipeline 172, 11. High-temperature heat source pipeline 173, 12. High-temperature heat source pipeline 174, 14. Medium-temperature heat source pipeline 175, 15. Medium-temperature heat source pipeline 176, 12. Normal-temperature heat source pipeline 177, 13. Normal-temperature heat source pipeline 178, 14. Normal-temperature heat source pipeline 179, 15. Cooling water circulation pipeline 180, 16. Cooling water circulation pipeline 181, 17. Cooling water circulation pipeline 182, 18. Cooling water circulation pipeline 183, 19. Cooling water circulation pipeline 184, 20. Cooling water circulation pipeline 185.

[0044] The outlet end of the first high-temperature heat pipe 41 is connected to the inlet end of the second high-temperature heat pipe 42 and the inlet end of the first process heat pipe 111. The first process heat pipe 111 is equipped with a first regulating valve 21. The outlet end of the first process heat pipe 111 is connected to the hot water inlet end of the first process heat exchanger 1. The hot water outlet end of the first process heat exchanger 1 is connected to the inlet end of the second process heat pipe 112. The outlet end of the second high-temperature heat pipe 42 is connected to the inlet end of the eleventh high-temperature heat pipe 173 and the inlet end of the ninth process heat pipe 119. The ninth process heat pipe 119 is equipped with a ninth regulating valve 29. The outlet end of the ninth process heat pipe 119 is connected to the fifth process heat exchanger. The hot water inlet of the fifth process heat exchanger 5 is connected to the hot water outlet of the fifth process heat exchanger 5, which is connected to the inlet of the tenth process heat pipe 120. The outlet of the eleventh high-temperature heat pipe 173 is connected to the inlet of the twelfth high-temperature heat pipe 174 and the inlet of the thirteenth process heat pipe 123. The thirteenth process heat pipe 123 is equipped with a thirteenth regulating valve 33. The outlet of the thirteenth process heat pipe 123 is connected to the hot water inlet of the seventh process heat exchanger 7. The hot water outlet of the seventh process heat exchanger 7 is connected to the inlet of the fourteenth process heat pipe 124. The outlet of the twelfth high-temperature heat pipe 174 merges with the outlet of the second high-temperature heating pipe 152 and then connects to the fifth high-temperature heat pipe 5. The inlet end of the fifth high-temperature heating pipeline 45 is connected to the outlet end of the tenth high-temperature heating pipeline 160, which then connects to the inlet end of the sixth high-temperature heating pipeline 46. A first circulating pump 35 is installed on the sixth high-temperature heating pipeline 46. The outlet end of the sixth high-temperature heating pipeline 46 is connected to the inlet end of the seventh high-temperature heating pipeline 47 and the inlet end of the ninth high-temperature heating pipeline 159. The outlet end of the ninth high-temperature heating pipeline 159 is connected to the high-level inlet end of the fifth heat pump heat exchanger 12. The high-level outlet end of the fifth heat pump heat exchanger 12 is connected to the inlet end of the tenth high-temperature heating pipeline 160. The outlet end of the seventh high-temperature heating pipeline 47 is connected to the inlet end of the eighth high-temperature heating pipeline 48 and the... The inlet end of the first high-temperature heating pipeline 151 is connected to the inlet end of the first high-temperature heating pipeline 151, and the outlet end of the first high-temperature heating pipeline 151 is connected to the high-level inlet end of the first heat pump heat exchanger 8. The high-level outlet end of the first heat pump heat exchanger 8 is connected to the inlet end of the second high-temperature heating pipeline 152. The outlet end of the eighth high-temperature heating pipeline 48 merges with the fourteenth process heating pipeline 124 and then connects to the inlet end of the ninth high-temperature heating pipeline 49. The outlet end of the ninth high-temperature heating pipeline 49 merges with the outlet end of the tenth process heating pipeline 120 and then connects to the inlet end of the tenth high-temperature heating pipeline 50. The outlet end of the tenth high-temperature heating pipeline 50 merges with the outlet end of the second process heating pipeline 112 and then connects to the inlet end of the first high-temperature heating pipeline 41.

[0045] The outlet of the first intermediate-temperature heating pipe 51 is connected to the inlet of the second intermediate-temperature heating pipe 52 and the inlet of the third process heating pipe 113. The third process heating pipe 113 is equipped with a third regulating valve 23. The outlet of the third process heating pipe 113 is connected to the hot water inlet of the second process heat exchanger 2. The hot water outlet of the second process heat exchanger 2 is connected to the inlet of the fourth process heating pipe 114. The outlet of the second intermediate-temperature heating pipe 52 is connected to the inlet of the third intermediate-temperature heating pipe 53 and the inlet of the seventh process heating pipe 117. The seventh process heating pipe 117 is equipped with a seventh regulating valve 27. The outlet of the seventh process heating pipe 117 is connected to the fourth process heat exchanger 4. The hot water inlet of the fourth process heat exchanger 4 is connected to the inlet of the eighth process heat pipe 118. The outlet of the third medium-temperature heat pipe 53 is connected to the inlet of the fourteenth medium-temperature heat pipe 175 and the inlet of the eleventh process heat pipe 121. The eleventh process heat pipe 121 is equipped with an eleventh regulating valve 31. The outlet of the eleventh process heat pipe 121 is connected to the hot water inlet of the sixth process heat exchanger 6. The hot water outlet of the sixth process heat exchanger 6 is connected to the inlet of the twelfth process heat pipe 122. The outlet of the fourteenth medium-temperature heat pipe 175 merges with the fourteenth waste heat discharge pipe 144 and then connects to the inlet of the fifteenth medium-temperature heat pipe 176. The outlet end of the fifteenth medium-temperature heating pipe 176 is connected to the inlet end of the sixth medium-temperature heating pipe 56 and the inlet end of the first low-level heat source pipe 161. The outlet end of the first low-level heat source pipe 161 is connected to the low-level inlet end of the first heat pump heat exchanger 8. The low-level outlet end of the first heat pump heat exchanger 8 is connected to the inlet end of the second low-level heat source pipe 162. The outlet end of the sixth medium-temperature heating pipe 56 merges with the fourth high-temperature heating pipe 154 and then connects to the inlet end of the seventh medium-temperature heating pipe 57. The outlet end of the seventh medium-temperature heating pipe 57 merges with the eighth high-temperature heating pipe 158 and then connects to the inlet end of the eighth medium-temperature heating pipe 58. A second circulating pump 36 is installed on the eighth medium-temperature heating pipe 58. The outlet end of the eighth intermediate-temperature heating pipe 58 is connected to the inlet end of the ninth intermediate-temperature heating pipe 59 and the inlet end of the seventh high-temperature heating pipe 157, respectively. The outlet end of the seventh high-temperature heating pipe 157 is connected to the high-level inlet end of the fourth heat pump heat exchanger 11. The high-level outlet end of the fourth heat pump heat exchanger 11 is connected to the inlet end of the eighth high-temperature heating pipe 158. The outlet end of the ninth intermediate-temperature heating pipe 59 is connected to the inlet end of the tenth intermediate-temperature heating pipe 60 and the inlet end of the third high-temperature heating pipe 153, respectively. The outlet end of the third high-temperature heating pipe 153 is connected to the high-level inlet end of the second heat pump heat exchanger 9. The high-level outlet end of the second heat pump heat exchanger 9 is connected to the outlet end of the fourth high-temperature heating pipe 154.The outlet of the tenth intermediate temperature heating pipe 60 is connected to the inlet of the eleventh intermediate temperature heating pipe 61 and the inlet of the thirteenth waste heat discharge pipe 143. The thirteenth waste heat discharge pipe 143 is equipped with a fourteenth regulating valve 34. The outlet of the thirteenth waste heat discharge pipe 143 is connected to the waste hot water inlet of the seventh process heat exchanger 7. The waste hot water outlet of the seventh process heat exchanger 7 is connected to the inlet of the fourteenth waste heat discharge pipe 144. The outlet of the eleventh intermediate temperature heating pipe 61 merges with the outlet of the twelfth process heat pipe 122 and then connects to the inlet of the twelfth intermediate temperature heating pipe 62. The outlet of the twelfth intermediate temperature heating pipe 62 merges with the eighth process heat pipe 118 and then connects to the inlet of the thirteenth intermediate temperature heating pipe 63. The outlet of the thirteenth intermediate temperature heating pipe 63 merges with the fourth process heat pipe 114 and then connects to the inlet of the first intermediate temperature heating pipe 51.

[0046] The outlet of the first ambient temperature heating pipe 71 is connected to the inlet of the second ambient temperature heating pipe 72 and the inlet of the fifth process heating pipe 115. The fifth process heating pipe 115 is equipped with a fifth regulating valve 25. The outlet of the fifth process heating pipe 115 is connected to the hot water inlet of the third process heat exchanger 3. The hot water outlet of the third process heat exchanger 3 is connected to the inlet of the sixth process heating pipe 116. The outlet of the second ambient temperature heating pipe 72 merges with the outlet of the tenth waste heat discharge pipe 140 and then connects to the inlet of the twelfth ambient temperature heating pipe 177. The outlet of the twelfth ambient temperature heating pipe 177 merges with the twelfth waste heat discharge pipe 142 and then connects to the inlet of the thirteenth ambient temperature heating pipe 178. The outlet of the thirteenth ambient temperature heating pipe 178 is connected to the inlet of the fourteenth ambient temperature heating pipe 179 and the inlet of the third low-level heat source pipe 163. The outlet of the third low-level heat source pipe 163 is connected to the low-level inlet of the second heat pump heat exchanger 9. The low-level outlet of the second heat pump heat exchanger 9 is connected to the inlet of the fourth low-level heat source pipe 164. The outlet of the fourteenth ambient temperature heating pipe 179 merges with the outlet of the sixth high-temperature heating pipe 156 and then connects to the inlet of the sixth ambient temperature heating pipe 76. The outlet of the sixth ambient temperature heating pipe 76 is connected to the inlet of the seventh ambient temperature heating pipe 77 and the inlet of the ninth low-level heat source pipe 169. The outlet of the ninth low-level heat source pipe 169 is connected to the fifth heat source pipe 164. The low-side inlet end of the heat pump heat exchanger 12 is connected to the inlet end of the seventh ambient temperature heat pipeline 77, which is equipped with a third circulating pump 37. The low-side outlet end of the fifth heat pump heat exchanger 12 is connected to the inlet end of the tenth low-side heat source pipeline 170. The outlet end of the seventh ambient temperature heat pipeline 77 and the outlet end of the tenth low-side heat source pipeline 170 merge and are connected to the inlet end of the eighth ambient temperature heat pipeline 78. The outlet end of the eighth ambient temperature heat pipeline 78 is connected to the inlet end of the ninth ambient temperature heat pipeline 79 and the inlet end of the fifth high-temperature heating pipeline 155. The outlet end of the fifth high-temperature heating pipeline 155 is connected to the high-side inlet end of the third heat pump heat exchanger 10. The high-side outlet end of the third heat pump heat exchanger 10 is connected to the inlet end of the sixth high-temperature heating pipeline 156. The outlet of ambient temperature heating pipe 79 is connected to the inlet of the tenth ambient temperature heating pipe 80 and the inlet of the eleventh waste heat discharge pipe 141. The eleventh waste heat discharge pipe 141 is equipped with a twelfth regulating valve 32. The outlet of the eleventh waste heat discharge pipe 141 is connected to the wastewater inlet of the sixth process heat exchanger 6. The wastewater outlet of the sixth process heat exchanger 6 is connected to the inlet of the twelfth waste heat discharge pipe 142. The outlet of the tenth ambient temperature heating pipe 80 is connected to the inlet of the eleventh ambient temperature heating pipe 81 and the inlet of the ninth waste heat discharge pipe 139. The ninth waste heat discharge pipe 139 is equipped with a tenth regulating valve 30. The outlet of the ninth waste heat discharge pipe 139 is connected to the wastewater inlet of the fifth process heat exchanger 5.The wastewater outlet of the fifth process heat exchanger 5 is connected to the inlet of the tenth waste heat discharge pipeline 140. The outlet of the eleventh ambient temperature heat pipeline 81 merges with the outlet of the sixth process heat pipeline 116 and then connects to the inlet of the first ambient temperature heat pipeline 71.

[0047] The outlet end of the first cooling water circulation pipe 91 merges with the outlet end of the second waste heat discharge pipe 132 and then connects to the inlet end of the second cooling water circulation pipe 92. The outlet end of the second cooling water circulation pipe 92 merges with the outlet end of the fourth waste heat discharge pipe 134 and then connects to the inlet end of the third cooling water circulation pipe 93. The outlet end of the third cooling water circulation pipe 93 merges with the outlet end of the sixth waste heat discharge pipe 136 and then connects to the inlet end of the fourth cooling water circulation pipe 94. The outlet end of the fourth cooling water circulation pipe 94 merges with the outlet end of the eighth waste heat discharge pipe 138 and then connects to the inlet end of the fifteenth cooling water circulation pipe 180. The outlet end of the fifteenth cooling water circulation pipe 180 connects to the outlet end of the sixteenth cooling water circulation pipe 180. The inlet end of cooling water circulation pipe 181 is connected to the inlet end of the fifth low-level heat source pipe 165. The outlet end of the fifth low-level heat source pipe 165 is connected to the low-level inlet end of the third heat pump heat exchanger 10. The outlet end of the sixteenth cooling water circulation pipe 181 is connected to the inlet end of the seventeenth cooling water circulation pipe 182 and the inlet end of the seventh low-level heat source pipe 167. The outlet end of the seventh low-level heat source pipe 167 is connected to the low-level inlet end of the fourth heat pump heat exchanger 11. The outlet end of the seventeenth cooling water circulation pipe 182 is connected to the inlet end of the eighteenth cooling water circulation pipe 183 and the inlet end of the first cooling water pipe 171. The outlet end of the first cooling water pipe 171 is connected to the inlet end of the cooling tower 13. The outlet end of the cooling tower 13 is connected to the second cooling water pipe 171. The inlet end of pipe 172 is connected to the fourth circulation pump 38 installed on the eighteenth cooling water circulation pipe 183. The outlet end of the eighteenth cooling water circulation pipe 183 merges with the outlet end of the second cooling water pipe 172 and then connects to the inlet end of the nineteenth cooling water circulation pipe 184. The outlet end of the nineteenth cooling water circulation pipe 184 merges with the outlet end of the eighth low-level heat source pipe 168 and then connects to the inlet end of the twentieth cooling water circulation pipe 185. The outlet end of the twentieth cooling water circulation pipe 185 merges with the outlet end of the sixth low-level heat source pipe 166 and then connects to the inlet end of the eleventh cooling water circulation pipe 101. The outlet end of the eleventh cooling water circulation pipe 101 is connected to the inlet end of the twelfth cooling water circulation pipe 102 and the seventh waste The inlet end of the seventh waste heat discharge pipe 137 is connected to the eighth regulating valve 28. The outlet end of the seventh waste heat discharge pipe 137 is connected to the waste hot water inlet end of the fourth process heat exchanger 4. The waste hot water outlet end of the fourth process heat exchanger 4 is connected to the inlet end of the eighth waste heat discharge pipe 138. The outlet end of the twelfth cooling water circulation pipe 102 is connected to the inlet end of the thirteenth cooling water circulation pipe 103 and the inlet end of the fifth waste heat discharge pipe 135. The fifth waste heat discharge pipe 135 is equipped with a sixth regulating valve 26. The outlet end of the fifth waste heat discharge pipe 135 is connected to the waste hot water inlet end of the third process heat exchanger 3. The waste hot water outlet end of the third process heat exchanger 3 is connected to the sixth waste heat discharge pipe 136.The outlet of the thirteenth cooling water circulation pipe 103 is connected to the inlet of the fourteenth cooling water circulation pipe 104 and the inlet of the third waste heat discharge pipe 133. A fourth regulating valve 24 is installed on the third waste heat discharge pipe 133. The outlet of the third waste heat discharge pipe 133 is connected to the waste hot water inlet of the second process heat exchanger 2. The waste hot water outlet of the second process heat exchanger 2 is connected to the inlet of the fourth waste heat discharge pipe 134. The outlet of the fourteenth cooling water circulation pipe 104 is connected to the inlet of the first cooling water circulation pipe 91 and the inlet of the first waste heat discharge pipe 131. A second regulating valve 22 is installed on the first waste heat discharge pipe 131. The outlet of the first waste heat discharge pipe 131 is connected to the waste hot water inlet of the first process heat exchanger 1. The waste hot water outlet of the first process heat exchanger 1 is connected to the inlet of the second waste heat discharge pipe 132.

[0048] The operating principle of this implementation plan is as follows:

[0049] 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 13, 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.

[0050] Specifically, the high-temperature heat busbar supplies 95°C hot water to the first process heat exchanger 1 (high-temperature zone process end) via the first process heat pipe 111 and the second process heat pipe 112. The return water temperature after heat exchange is 90°C. Excess waste heat after being used by the first process heat exchanger 1 achieves a cooling cycle of 35°C / 40°C through the first waste heat discharge pipe 131 and the second waste heat discharge pipe 132. The high-temperature heat busbar supplies 95°C hot water to the fifth process heat exchanger 5 via the ninth process heat pipe 119 and the tenth process heat pipe 120. The return water temperature after heat exchange is 90°C. Excess waste heat after being used by the fifth process heat exchanger 5 achieves a cooling cycle of 50°C / 60°C through the ninth waste heat discharge pipe 139 and the tenth waste heat discharge pipe 140. The high-temperature heat busbar supplies 95°C hot water to the fifth process heat exchanger 5 via the tenth process heat pipe 119 and the tenth process heat discharge pipe 120. The third process heat pipe 123 and the fourteenth process heat pipe 124 supply 95°C hot water to the seventh process heat exchanger 7. The return water temperature after heat exchange is 90°C. The excess waste heat after the heat is used by the seventh process heat exchanger 7 achieves a 70°C / 80°C cooling cycle through the thirteenth waste heat discharge pipe 143 and the fourteenth waste heat discharge pipe 144. The corresponding first heat pump heat exchanger 8 is electrically driven and absorbs the heat of the 80°C supply water on the low side through the first low-level heat source pipe 161 and the second low-level heat source pipe 162, or electrically driven fifth heat pump heat exchanger 12 absorbs the heat of the 60°C supply water on the low side through the ninth low-level heat source pipe 169 and the tenth low-level heat source pipe 170. This can raise the return water temperature of the high-temperature heat bus from 90°C to 95°C, thereby maintaining the energy input and output balance of the high-temperature heat bus.

[0051] The medium-temperature heat busbar can supply 80°C hot water to the second process heat exchanger 2 (medium-temperature zone process end) through the third process heat pipe 113 and the fourth process heat pipe 114. The return water temperature after heat exchange is 70°C. Excess waste heat after being used by the second process heat exchanger 2 achieves a 35°C / 40°C cooling cycle through the third waste heat discharge pipe 133 and the fourth waste heat discharge pipe 134. The medium-temperature heat busbar can supply 80°C hot water to the fourth process heat exchanger 4 through the seventh process heat pipe 117 and the eighth process heat pipe 118. The return water temperature after heat exchange is 70°C. Excess waste heat after being used by the fourth process heat exchanger 4 achieves a 35°C / 40°C cooling cycle through the seventh waste heat discharge pipe 137 and the eighth waste heat discharge pipe 138. The medium-temperature heat busbar can supply 80°C hot water to the second process heat exchanger 4 through the eleventh process heat pipe 121 and the twelfth process heat pipe 112. The process heat exchanger 122 supplies 80°C hot water to the sixth process heat exchanger 6. The return water temperature after heat exchange is 70°C. The excess waste heat after the sixth process heat exchanger 6 is used achieves a 50°C / 60°C cooling cycle through the eleventh waste heat discharge pipe 141 and the twelfth waste heat discharge pipe 142. The corresponding second heat pump heat exchanger 9 is electrically driven and absorbs 60°C supply heat from the low-level side water supply through the third low-level heat source pipe 163 and the fourth low-level heat source pipe 164, which can raise the return water temperature of the medium-temperature heat bus from 70°C to 80°C. Alternatively, the fourth heat pump heat exchanger 11 is electrically driven and absorbs 40°C supply heat from the low-level side water supply through the seventh low-level heat source pipe 167 and the eighth low-level heat source pipe 168, which can raise the return water temperature of the medium-temperature heat bus from 70°C to 80°C, thereby maintaining the energy input and output balance of the high-temperature heat bus.

[0052] The ambient temperature heat exchanger can supply 60°C hot water to the third process heat exchanger 3 (ambient temperature zone process end) through the fifth process heat pipe 115 and the sixth process heat pipe 116. The return water temperature after heat exchange is 50°C. The excess waste heat after the third process heat exchanger 3 uses heat achieves a 35°C / 40°C cooling cycle through the fifth waste heat discharge pipe 135 and the sixth waste heat discharge pipe 136. The corresponding third heat pump heat exchanger 10 is electrically driven and absorbs the heat of the 40°C supply water on the low side through the fifth low-level heat source pipe 165 and the sixth low-level heat source pipe 166, which can raise the return water temperature of the ambient temperature heat exchanger from 50°C to 60°C, thereby maintaining the energy balance of the ambient temperature heat exchanger.

[0053] In the entire cycle system, the external input is only the electrical energy to drive the heat pump cycle, and excess heat is discharged through the cooling tower; the waste heat at the end of the heat-using process can be directly discharged to the cooling water circulation bus, or it can be discharged to the adjacent or second-adjacent low-level bus side through a single-stage or double-stage bus; the heat pump device realizes the energy quality improvement between adjacent buses and second-adjacent buses, and realizes the recycling of energy through the temperature increase of single-stage and double-stage heat pumps.

[0054] Overall, this invention achieves two effects. Through a tiered arrangement of high-temperature, medium-temperature, and ambient-temperature heat pumps and cooling water busbars, combined with electric-driven heat pumps between adjacent busbars for energy quality enhancement, it enables tiered heating and closed-loop circulation at different temperature zones. By leveraging multi-stage heat pumps and cascade utilization, a significant amount of waste heat is recovered and reused within the system, significantly reducing the consumption of primary high-grade energy sources such as gas-fired boilers or centralized heating systems. Simultaneously, it significantly reduces the heat ultimately discharged to the cooling tower, thus lowering environmental heat emissions.

[0055] This invention utilizes multi-stage waste heat transfer and multi-stage heat pump heating to independently adjust the supply and return water temperature and flow rate according to changes in the load of each process. It achieves heat balance across zones when the load in a local temperature zone suddenly increases or the load in another temperature zone decreases, significantly improving the system's adaptability and operational stability to various types of fluctuating load conditions.

[0056] 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 power-driven energy cycle system based on a cascaded energy bus, characterized in that: It includes a first process heat exchanger (1), a second process heat exchanger (2), a third process heat exchanger (3), a first heat pump heat exchanger (8), a second heat pump heat exchanger (9), a third heat pump heat exchanger (10), a cooling tower (13), a first circulating pump (35), a second circulating pump (36), a third circulating pump (37), a fourth circulating pump (38), a first high-temperature thermal pipeline (41), a first medium-temperature thermal pipeline (51), a second medium-temperature thermal pipeline (52), a first normal-temperature thermal pipeline (71), a second normal-temperature thermal pipeline (72), a first cooling water circulation pipeline (91), a fourth cooling water circulation pipeline (94), and a fifth cooling water circulation pipeline (95). In the high-temperature thermal cycle, one branch pipe at the outlet end of the first high-temperature thermal pipeline (41) is connected to the hot water inlet end of the first process heat exchanger (1), and another branch pipe at the outlet end of the first high-temperature thermal pipeline (41) merges with the high-level outlet end of the first heat pump heat exchanger (8) and then connects to the inlet end of the first circulating pump (35). One branch pipe at the outlet end of the first circulating pump (35) is connected to the high-level inlet end of the first heat pump heat exchanger (8), and another branch pipe at the outlet end of the first circulating pump (35) merges with the hot water outlet end of the first process heat exchanger (1) and then connects to the inlet end of the first high-temperature thermal pipeline (41). In the intermediate-temperature thermal cycle, one branch pipe at the outlet end of the first intermediate-temperature thermal pipeline (51) is connected to the hot water inlet end of the second process heat exchanger (2), and another branch pipe at the outlet end of the first intermediate-temperature thermal pipeline (51) is connected to the inlet end of the second intermediate-temperature thermal pipeline (52). One branch pipe at the outlet end of the second intermediate-temperature thermal pipeline (52) is connected to the low-side inlet end of the first heat pump heat exchanger (8), and another branch pipe at the outlet end of the second intermediate-temperature thermal pipeline (52) is connected to the inlet end of the second heat pump heat exchanger (8). The high-side outlet of the first heat pump heat exchanger (9) and the second heat pump heat exchanger (9) merge and are connected to the inlet of the second circulating pump (36). One branch pipe at the outlet of the second circulating pump (36) is connected to the high-side inlet of the second heat pump heat exchanger (9). The other branch pipe at the outlet of the second circulating pump (36) merges with the low-side outlet of the first heat pump heat exchanger (8) and the hot water outlet of the second process heat exchanger (2) and is connected to the inlet of the first medium-temperature thermal pipeline (51). In the ambient temperature thermal cycle, one branch pipe at the outlet end of the first ambient temperature thermal pipeline (71) is connected to the hot water inlet end of the third process heat exchanger (3), and another branch pipe at the outlet end of the first ambient temperature thermal pipeline (71) is connected to the inlet end of the second ambient temperature thermal pipeline (72). One branch pipe at the outlet end of the second ambient temperature thermal pipeline (72) is connected to the low-side inlet end of the second heat pump heat exchanger (9), and another branch pipe at the outlet end of the second ambient temperature thermal pipeline (72) After merging with the high-side outlet end of the third heat pump heat exchanger (10), it is connected to the inlet end of the third circulating pump (37). One branch pipe of the outlet end of the third circulating pump (37) is connected to the high-side inlet end of the third heat pump heat exchanger (10). Another branch pipe of the outlet end of the third circulating pump (37) is connected to the hot water outlet end of the third process heat exchanger (3) and the low-side outlet end of the second heat pump heat exchanger (9) in sequence, and then connected to the inlet end of the first ambient temperature heat pipe (71). In the cooling water circulation, the outlet end of the first cooling water circulation pipe (91) is connected to the waste hot water outlet end of the first process heat exchanger (1), the waste hot water outlet end of the second process heat exchanger (2), and the waste hot water outlet end of the third process heat exchanger (3) in sequence, and then connected to the inlet end of the fourth cooling water circulation pipe (94). One branch pipe at the outlet end of the fourth cooling water circulation pipe (94) is connected to the low-side inlet end of the third heat pump heat exchanger (10), and another branch pipe at the outlet end of the fourth cooling water circulation pipe (94) is connected to the fifth cooling water circulation pipe (94). The inlet end of the fifth cooling water circulation pipeline (95) is connected to the outlet end of the fifth cooling water circulation pipeline (95). After flowing through the cooling tower (13) in a branch pipeline, it is connected to the inlet end of the fourth circulation pump (38). The outlet end of the fourth circulation pump (38) and the low-side outlet end of the third heat pump heat exchanger (10) merge. The merged pipeline is connected in sequence to the waste hot water inlet end of the third process heat exchanger (3), the waste hot water inlet end of the second process heat exchanger (2) and the waste hot water inlet end of the first process heat exchanger (1), and finally connected to the inlet end of the first cooling water circulation pipeline (91).

2. The electric drive energy cycle system based on a cascade energy bus according to claim 1, characterized in that: A first regulating valve (21) is provided on the pipeline connected to the hot water inlet end of the first process heat exchanger (1), a second regulating valve (22) is provided on the pipeline connected to the waste hot water inlet end of the first process heat exchanger (1), a third regulating valve (23) is provided on the pipeline connected to the hot water inlet end of the second process heat exchanger (2), a fourth regulating valve (24) is provided on the pipeline connected to the waste hot water inlet end of the second process heat exchanger (2), a fifth regulating valve (25) is provided on the pipeline connected to the hot water inlet end of the third process heat exchanger (3), and a sixth regulating valve (26) is provided on the pipeline connected to the waste hot water inlet end of the third process heat exchanger (3).

3. A power-driven energy cycle system based on a cascaded energy bus, characterized in that: It includes a first process heat exchanger (1), a second process heat exchanger (2), a third process heat exchanger (3), a fourth process heat exchanger (4), a fifth process heat exchanger (5), a sixth process heat exchanger (6), a seventh process heat exchanger (7), a first heat pump heat exchanger (8), a second heat pump heat exchanger (9), a third heat pump heat exchanger (10), a fourth heat pump heat exchanger (11), a fifth heat pump heat exchanger (12), a cooling tower (13), a first high-temperature heat pipeline (41), a first medium-temperature heat pipeline (51), a first normal-temperature heat pipeline (71), and a first cooling water circulation pipeline (91). In the high-temperature thermal cycle, the outlet end of the first high-temperature thermal pipeline (41) is sequentially connected to the hot water inlet end of the first process heat exchanger (1), the hot water inlet end of the fifth process heat exchanger (5), and the hot water inlet end of the seventh process heat exchanger (7). After connection, the pipeline is sequentially connected to the high-level outlet end of the first heat pump heat exchanger (8) and the high-level outlet end of the fifth heat pump heat exchanger (12). The pipeline after connection is connected to the inlet end of the first circulating pump (35). The outlet end of the first circulating pump (35) is sequentially connected to the high-level outlet end of the fifth heat pump heat exchanger (12) and the high-level outlet end of the first heat pump heat exchanger (8). The pipeline after connection is sequentially connected to the hot water outlet end of the seventh process heat exchanger (7), the hot water outlet end of the fifth process heat exchanger (5), and the hot water outlet end of the first process heat exchanger (1). The pipeline after connection is connected to the inlet end of the first high-temperature thermal pipeline (41). In the intermediate-temperature thermal cycle, the outlet end of the first intermediate-temperature thermal pipeline (51) is sequentially connected to the hot water inlet end of the second process heat exchanger (2), the hot water inlet end of the fourth process heat exchanger (4), and the hot water inlet end of the sixth process heat exchanger (6). The connected pipeline merges with the wastewater inlet end of the seventh process heat exchanger (7). The merged pipeline is then connected to the low-level inlet end of the first heat pump heat exchanger (8). The connected pipeline is sequentially connected to the high-level outlet end of the second heat pump heat exchanger (9) and the high-level outlet end of the fourth heat pump heat exchanger (11). The pipes merge at the side outlets and then connect to the inlet of the second circulating pump (36). The outlet of the second circulating pump (36) is connected in sequence to the high-level inlet of the fourth heat pump heat exchanger (11) and the high-level inlet of the second heat pump heat exchanger (9). The connected pipes then merge in sequence with the hot water outlet of the sixth process heat exchanger (6), the hot water outlet of the fourth process heat exchanger (4), and the hot water outlet of the second process heat exchanger (2). Finally, the merged pipes are connected to the inlet of the first medium-temperature thermal pipeline (51). In the low-temperature thermal cycle, one branch pipe at the outlet end of the first ambient temperature thermal pipeline (71) is connected to the hot water inlet end of the third process heat exchanger (3). Another branch pipe at the outlet end of the first ambient temperature thermal pipeline (71) is successively connected to the waste hot water outlet end of the fifth process heat exchanger (5) and the waste hot water outlet end of the sixth process heat exchanger (6). One branch pipe of the merged pipeline is connected to the low-side inlet end of the second heat pump heat exchanger (9). Another branch pipe of the merged pipeline is connected to the high-side outlet end of the third heat pump heat exchanger (10). One branch pipe of the merged pipeline is connected to the low-side inlet end of the fifth heat pump heat exchanger (12). Another branch of the pipeline connects to the inlet of the third circulating pump (37). The outlet of the third circulating pump (37) merges with the low-side outlet of the fifth heat pump heat exchanger (12). After merging again, one branch of the pipeline connects to the high-side inlet of the third heat pump heat exchanger (10). After merging again, another branch of the pipeline merges with the low-side outlet of the second heat pump heat exchanger (9). The pipeline that merges again connects sequentially to the waste hot water inlet of the sixth process heat exchanger (6) and the waste hot water inlet of the fifth process heat exchanger (5). Finally, the pipeline merges with the hot water outlet of the third process heat exchanger (3) and then connects to the inlet of the first ambient temperature heating pipeline (71). In the cooling water circulation, the outlet end of the first cooling water circulation pipeline (91) is sequentially connected to the waste hot water outlet end of the first process heat exchanger (1), the waste hot water outlet end of the second process heat exchanger (2), the waste hot water outlet end of the third process heat exchanger (3), and the waste hot water outlet end of the fourth process heat exchanger (4). The pipeline after the connection is sequentially connected to the low-side inlet end of the third heat pump heat exchanger (10), the low-side inlet end of the fourth heat pump heat exchanger (11), and the inlet end of the cooling tower (13). The pipeline after the connection is connected to the inlet end of the fourth circulation pump (38). Then, the outlet end of the fourth circulating pump (38) is connected in sequence to the outlet end of the cooling tower (13), the low-side outlet end of the fourth heat pump heat exchanger (11) and the low-side outlet end of the third heat pump heat exchanger (10). Finally, the pipeline after the connection is connected in sequence to the waste hot water inlet end of the fourth process heat exchanger (4), the waste hot water inlet end of the third process heat exchanger (3), the waste hot water inlet end of the second process heat exchanger (2) and the waste hot water inlet end of the first process heat exchanger (1). Finally, the pipeline after connection is connected to the inlet end of the first cooling water circulation pipeline (91).

4. The electric drive energy cycle system based on a cascade energy bus according to claim 3, characterized in that: A first regulating valve (21) is provided on the pipe connected to the hot water inlet of the first process heat exchanger (1), a second regulating valve (22) is provided on the pipe connected to the waste hot water inlet of the first process heat exchanger (1), a third regulating valve (23) is provided on the pipe connected to the hot water inlet of the second process heat exchanger (2), a fourth regulating valve (24) is provided on the pipe connected to the waste hot water inlet of the second process heat exchanger (2), a fifth regulating valve (25) is provided on the pipe connected to the hot water inlet of the third process heat exchanger (3), a sixth regulating valve (26) is provided on the pipe connected to the waste hot water inlet of the third process heat exchanger (3), and a seventh regulating valve (27) is provided on the pipe connected to the hot water inlet of the fourth process heat exchanger (4). The pipe connected to the waste hot water inlet of the fourth process heat exchanger (4) is equipped with an eighth regulating valve (28), the pipe connected to the hot water inlet of the fifth process heat exchanger (5) is equipped with a ninth regulating valve (29), the pipe connected to the waste hot water inlet of the fifth process heat exchanger (5) is equipped with a tenth regulating valve (30), the pipe connected to the hot water inlet of the sixth process heat exchanger (6) is equipped with an eleventh regulating valve (31), the pipe connected to the waste hot water inlet of the sixth process heat exchanger (6) is equipped with a twelfth regulating valve (32), the pipe connected to the hot water inlet of the seventh process heat exchanger (7) is equipped with a thirteenth regulating valve (33), and the pipe connected to the waste hot water inlet of the seventh process heat exchanger (7) is equipped with a fourteenth regulating valve (34).

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