Multi-function coupling self-driven sewage treatment and heat recovery system

Abstract

This invention relates to a multi-energy coupled self-driven wastewater treatment and heat recovery synergistic system. It includes a wastewater treatment component, a heat recovery component, and a thermoelectric module. The wastewater treatment component comprises a flocculation chamber, a wastewater treatment chamber, and a flocculated particle collection chamber. The sidewall of the flocculation chamber is equipped with a flexible diaphragm switch driven by fluid pressure difference, enabling adaptive and precise dosing of flocculant. The flocculated particle collection chamber is equipped with a flocculated particle capture plate triggered by particle gravity torque, achieving self-triggered solid-liquid separation. The heat recovery component suspends multiple phase change heat storage rods via elastic ropes. The front end of each phase change heat storage rod has a balance ball controlled by a positive arc temperature-sensing piezoelectric spring signal, which, together with the elastic ropes, excites the phase change heat storage rod to generate multi-degree-of-freedom oscillation, enhancing heat transfer. The phase change heat storage rods have a built-in thermoelectric module that converts the temperature difference energy and expansion mechanical energy of the phase change process into electrical energy, providing self-powered operation for the system. This achieves integrated, low-energy-consumption operation.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment and energy recovery technology, and in particular to a multi-energy coupled self-driven wastewater treatment and heat recovery synergistic system. Background Technology

[0002] For wastewater treatment containing low-grade heat energy, the wastewater treatment unit mainly adopts the traditional flocculation sedimentation process. Wastewater enters the reaction tank through pipelines, and flocculants are quantitatively added by an external dosing pump. The mixture reacts with a stirrer (mechanical or hydraulic), forming flocs. Solid-liquid separation is then achieved in the subsequent sedimentation tank or flotation tank by gravity or air bubbles. This wastewater treatment unit suffers from poor intelligence and adaptability, resulting in high energy and chemical consumption. On the one hand, chemical dosing is inefficient; flocculants are typically added using a fixed-flow pump, making precise adjustments based on real-time changes in wastewater flow and concentration impossible. This leads to chemical waste or uneven mixing, affecting treatment effectiveness and increasing costs. On the other hand, separation efficiency is limited; solid-liquid separation relies on passive methods such as gravity sedimentation, which is inefficient, requires a large area, and lacks intelligent response to dynamic changes in floc state.

[0003] Heat recovery units are typically located at the end of wastewater treatment processes. These units suffer from low heat transfer efficiency, and enhancement methods are energy-intensive. The poor thermal conductivity of phase change thermal storage materials is an inherent bottleneck, leading to long heat storage / release cycles and bulky equipment. Existing passive enhancement technologies (such as fins) have limited effectiveness and sacrifice heat storage capacity; active enhancement technologies (such as mechanical vibration and stirring) require continuous high-grade electrical energy to operate, and their energy input may offset or even exceed the recovered heat energy gains, resulting in poor economic efficiency. Furthermore, during heat storage / release, the phase change material inevitably undergoes volume changes (expansion / contraction), generating significant mechanical energy (expansion force); simultaneously, a temperature gradient (temperature difference) always exists within the system due to the movement of the phase change interface and fluid flow. In existing technologies, this mechanical and thermal energy is often considered a negative factor that needs to be absorbed by the structure or naturally dissipated, resulting in complete energy waste and failure to be converted into valuable output.

[0004] The aforementioned wastewater treatment unit and heat recovery unit are two physically separate and functionally independent systems. The wastewater treatment process consumes external electrical energy (for stirring and pumping), while the subsequent heat recovery unit can only recover a portion of the sensible heat, and the energy consumed by each unit is all externally input. The entire process involves multiple energy inputs and wastes, resulting in low overall system energy efficiency and hindering its widespread application in the field of energy conservation and carbon reduction. Summary of the Invention

[0005] This invention provides a multi-energy coupled self-driven wastewater treatment and heat recovery synergistic system to solve the problems of multiple energy inputs and wastes in the entire process of the existing technology, resulting in low overall system energy efficiency and restricting its widespread application in the field of energy conservation and carbon reduction.

[0006] This invention discloses a multi-energy coupled self-driven wastewater treatment and heat recovery synergistic system, comprising: a wastewater treatment component, a heat recovery component, and a thermoelectric module; the wastewater treatment component includes a flocculation chamber, a wastewater treatment chamber, and a flocculated particle collection chamber arranged sequentially from the inside out; a flexible diaphragm switch is provided on the side wall of the flocculation chamber, which can control the outflow of flocculated liquid from the flocculation chamber according to the fluid pressure in the wastewater treatment chamber; a flocculated particle capturing plate is provided on the inner wall of the flocculated particle collection chamber, which can automatically open when the gravitational torque generated by the accumulation of flocculated particles in the wastewater treatment chamber exceeds a preset threshold, so that the flocculated particles enter the flocculated particle collection chamber; the heat recovery component includes a heat recovery area and a phase change heat storage component disposed in the heat recovery area; the heat recovery inlet of the heat recovery area is connected to the outlet of the wastewater treatment chamber, and the heat recovery outlet of the heat recovery area is located at the end away from the wastewater treatment component; The phase change thermal storage assembly includes multiple phase change thermal storage rods; each phase change thermal storage rod is equipped with a heat exchange component, which promotes heat exchange between the thermal fluid and the phase change thermal storage rod; a floating component is also provided in the heat recovery area, which, under the action of the electrical signal of the heat exchange component, can adjust the uniformity of the phase change material in the phase change thermal storage rod in the vertical direction; a fixing component is also provided in the heat recovery area, and adjacent phase change thermal storage rods and the top wall of the heat recovery area are connected by the fixing component, which can cause the phase change thermal storage rods to swing horizontally to adjust the uniformity of the phase change material in the phase change thermal storage rods; a thermoelectric module is provided in the heat recovery assembly, which is used to supply power to the multi-energy coupled self-driven wastewater treatment and heat recovery collaborative system.

[0007] Optionally, both the wastewater treatment chamber and the flocculated particle collection chamber are conical structures. The heat recovery component is connected to the downstream end of the conical structure. The wastewater treatment chamber and the flocculated particle collection chamber are respectively provided with a wastewater inlet and a discharging liquid inlet at the ends away from the heat recovery component. The flocculated particle collection chamber is respectively provided with a flocculated particle outlet and a flocculated particle heat recovery outlet at the end near the heat recovery component. The flocculated particle heat recovery outlet is configured to open before the flocculated particle outlet opens to preferentially recover the heat energy in the interstitial liquid of the flocculated particles. The flocculated particle heat recovery outlet is connected to the heat recovery component and is provided with a filter screen. The wastewater treatment chamber is also provided with a wastewater chute connected to the wastewater inlet. The wastewater chute has a spirally descending groove structure. The flocculated liquid chamber has a cylindrical structure, and a flocculated liquid inlet is provided at the end of the flocculated liquid chamber away from the heat recovery component.

[0008] Optionally, the heat exchange assembly includes an inner swirling main pipe and a plurality of inner swirling branch pipes located on the outer periphery of the inner swirling main pipe. The inlet of the inner swirling branch pipe is located on the side close to the outer wall of the phase change heat storage rod, and the outlet of the inner swirling branch pipe is connected to the inner swirling main pipe. The phase change heat storage rod includes an outer shell and a phase change material disposed within the outer shell. The outer shell includes a plurality of adjacent shell assemblies. The shell assembly includes a first expandable deformable shell, a first fixed shell, a second fixed shell, and a second expandable deformable shell arranged sequentially. The first expandable deformable shell and the first fixed shell are connected, and the second fixed shell and the second expandable deformable shell are connected. The first fixed shell and the second fixed shell abut against each other. The outer shell can adjust the opening and closing of the inlet of the inner swirling branch pipe according to the phase change state of the phase change heat storage rod, so that the fluid can form a swirling flow that enhances heat exchange.

[0009] Optionally, the flexible diaphragm switch includes a mounting frame and two flexible diaphragms disposed within the mounting frame; the flexible diaphragms and the mounting frame are connected by a semi-circular pleat; wherein, in the initial state, the multi-energy coupled self-driven wastewater treatment and heat recovery synergistic system is not running, there is no pressure in the flocculation chamber, and the flexible diaphragms are tightly attached to the opening under their own elasticity, and are in a closed state; when the multi-energy coupled self-driven wastewater treatment and heat recovery synergistic system is started, wastewater flows in the wastewater treatment chamber, and a hydrostatic pressure P_out is generated inside the wastewater treatment chamber. At the same time, the flocculation pump starts, and a hydrostatic pressure P_in is established in the flocculation chamber. When P_in>P_out, a positive pressure difference is generated inside and outside the flexible diaphragm, causing it to bulge outward, and is in an open state; the greater the pressure difference, the greater the opening degree of the flexible diaphragm switch.

[0010] Optionally, the flocculant capture plate includes a micro-hinge and a grid plate disposed on the micro-hinge. The micro-hinge is disposed on the side wall of the flocculant collection chamber, and the grid plate is rotatably disposed on the micro-hinge, so that the grid plate can switch between a closed state and an open state. When the grid plate is in the open state, the flocculant particles can enter the flocculant collection chamber through the grid plate. When the gravitational torque generated by the flocculant particles accumulated on the inner wall of the wastewater treatment chamber exceeds the preset reset torque of the micro-hinge, the flocculant capture plate automatically rotates and opens towards the flocculant collection chamber.

[0011] Optionally, the multi-energy coupled self-driven wastewater treatment and heat recovery synergistic system further includes: a positive arc temperature-sensing piezoelectric spring and a negative arc temperature-sensing piezoelectric spring. One end of the positive arc temperature-sensing piezoelectric spring is connected to the first expandable deformable shell, and the other end is connected to the first fixed shell. One end of the negative arc temperature-sensing piezoelectric spring is connected to the second fixed shell, and the other end is connected to the second expandable deformable shell. The electrical signals generated by the positive arc temperature-sensing piezoelectric spring and / or the negative arc temperature-sensing piezoelectric spring can trigger the piezoelectric spring in the floating component to perform contraction and extension movements, thereby driving the floating component to work.

[0012] Optionally, the floating component includes a balance ball and a piezoelectric spring. The piezoelectric spring is arranged vertically, with one end connected to the top wall of the heat recovery zone near the heat recovery inlet, and the other end connected to the balance ball. The positive arc temperature-sensing piezoelectric spring and / or the negative arc temperature-sensing piezoelectric spring can control the balance ball to load or unload the phase change heat storage rod.

[0013] Optionally, the fastener includes a plurality of elastic ropes, each of which is arranged vertically. One end of a portion of the elastic ropes is connected to the top of the heat recovery zone, and the other end is connected to the outer wall of the phase change heat storage rod. Another portion of the elastic ropes is used to connect two adjacent phase change heat storage rods arranged on the same vertical line.

[0014] Optionally, the thermoelectric module includes a first type of thermoelectric element and a second type of thermoelectric element. The first type of thermoelectric element is disposed on the inner wall of the outer shell of the phase change heat storage rod, and the second type of thermoelectric element is disposed on the outer wall of the inner swirling main tube. Both the first type of thermoelectric element and the second type of thermoelectric element are used to generate electricity by the difference between the phase change temperature and the fluid temperature during the charging / discharging process.

[0015] Optionally, the multi-energy coupled self-driven wastewater treatment and heat recovery synergistic system further includes: a device support frame; the device support frame is used to support the wastewater treatment component and the heat recovery component; an insulation layer is provided on the wall of the heat recovery component; and a jet oscillator is provided at the heat recovery inlet.

[0016] The beneficial effects of the multi-energy coupled self-driven wastewater treatment and heat recovery synergistic system provided by this invention are as follows: The wastewater treatment component adopts a nested structural design, with a flocculant chamber, a wastewater treatment chamber, and a flocculant particle collection chamber nested sequentially from the inside out, forming a layered and synergistic treatment space, replacing the traditional independent reaction tank and sedimentation tank, and significantly reducing the equipment footprint. Among them, the side wall of the flocculant chamber is equipped with a flexible diaphragm switch, the core function of which is to drive the flexible diaphragm switch according to the fluid pressure difference in the wastewater treatment chamber, so as to realize the adaptive and precise addition of flocculant, solving the problem of the coarse addition of flocculant by the traditional fixed flow pump; the inner wall of the flocculant particle collection chamber is equipped with a flocculant particle capture plate, which is used to control the flocculant particles formed in the wastewater treatment chamber to enter the flocculant particle collection chamber. The flocculant particle capture plate is triggered by the gravity torque of the flocculant particles to realize self-triggered solid-liquid separation, replacing the traditional passive gravity sedimentation and improving the separation efficiency. The heat recovery assembly includes a heat recovery zone and a phase change heat storage assembly. The heat recovery inlet of the heat recovery zone is connected to the outlet of the sewage treatment chamber to ensure that the fluid containing low-grade heat energy after sewage treatment can directly enter the heat recovery zone and avoid heat energy loss during transmission. The heat recovery outlet is located at the end away from the sewage treatment assembly to ensure that the fluid after heat exchange is discharged smoothly. The phase change thermal storage component consists of multiple phase change thermal storage rods. Compared with the traditional integral phase change thermal storage structure, the decentralized phase change thermal storage rod design can increase the heat exchange area and alleviate the inherent bottleneck of poor thermal conductivity of phase change materials. Each phase change thermal storage rod is equipped with a heat exchange component, which is specifically used to promote heat transfer between the heat fluid and the phase change thermal storage rod, and enhance the heat exchange effect. In addition, floating components and fixing components are also set in the heat recovery area. Under the action of the electrical signal of the heat exchange component, the floating component adjusts the uniformity of the phase change material in the phase change thermal storage rod in the vertical direction. The fixing component is used to connect multiple phase change thermal storage rods and the top wall of the heat recovery area, so that the phase change thermal storage rods swing in the horizontal direction to adjust the uniformity of the phase change material. The two work together to solve the problem of uneven distribution of phase change material caused by volume change during heat storage / release, and further improve the heat exchange efficiency. The thermoelectric module is located inside the heat recovery assembly. Its core function is to convert the energy generated during the heat recovery process into electrical energy, specifically powering the multi-energy coupled self-driven wastewater treatment and heat recovery collaborative system of this application. This enables the system to achieve self-circulation of internal energy, reducing dependence on external power input and improving energy utilization efficiency. In summary, this application integrates the wastewater treatment assembly and the heat recovery assembly, improving wastewater treatment and heat recovery efficiency while also achieving self-sufficiency in internal energy supply, further reducing overall system energy consumption and meeting the application requirements for energy conservation and carbon reduction. Attached Figure Description

[0017] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0018] Figure 1This is a schematic diagram of the overall structure of the multi-energy coupled self-driven wastewater treatment and heat recovery synergistic system provided in the embodiments of the present invention; Figure 2 yes Figure 1 A magnified view of a section at point A in the middle; Figure 3 yes Figure 1 A magnified view of a section at point B in the middle; Figure 4 This is one of the schematic diagrams of the phase change heat storage rod and floating component cooperation structure provided in the embodiments of the present invention; Figure 5 This is the second schematic diagram of the phase change heat storage rod and floating component cooperation structure provided in the embodiment of the present invention; Figure 6 This is a cross-sectional view of the phase change heat storage rod provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the phase change thermal storage component provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of the flexible diaphragm switch when it is closed, provided in an embodiment of the present invention; Figure 9 This is a schematic diagram of the flexible diaphragm switch provided in an embodiment of the present invention when it is open; Figure 10 This is a schematic diagram illustrating the application of the flexible diaphragm switch provided in an embodiment of the present invention; Figure 11 This is a schematic diagram of the flocculant capture plate provided in an embodiment of the present invention when it is closed; Figure 12 yes Figure 11 A magnified view of a section at point D; Figure 13 This is a schematic diagram of the flocculant capture plate provided in an embodiment of the present invention when it is opened; Figure 14 yes Figure 13 A magnified view of a section at point E in the middle; Figure 15 This is one of the schematic diagrams of the cooperation structure between the outer shell and the positive arc temperature-sensing piezoelectric spring and the negative arc temperature-sensing piezoelectric spring provided in the embodiments of the present invention; Figure 16 This is the second schematic diagram of the cooperation structure between the outer shell and the positive arc temperature-sensing piezoelectric spring and the negative arc temperature-sensing piezoelectric spring provided in the embodiment of the present invention; Figure 17 yes Figure 1 AA section view; Figure 18 This is a schematic diagram of the structure of the thermoelectric module provided in an embodiment of the present invention.

[0019] In the diagram: 10. Wastewater treatment component; 110. Flocculant chamber; 1101. Flocculant inlet; 120. Wastewater treatment chamber; 1201. Wastewater inlet; 1202. Wastewater chute; 130. Flocculant collection chamber; 1301. Discharge liquid inlet; 1302. Flocculant outlet; 1303. Flocculant heat recovery outlet; 210. Flexible diaphragm switch; 21. Mounting frame; 211. Flexible diaphragm; 212. Semi-circular pleat; 220. Flocculant capture plate; 221. Miniature hinge; 222. Grating plate; 30. Heat recovery component; 310. Heat recovery area; 320. Phase change heat storage component; 321. Phase change heat storage rod; 31. Outer shell; 311. 312. Expandable deformable outer shell; 313. First fixed outer shell; 314. Second fixed outer shell; 315. Second expandable deformable outer shell; 301. Heat recovery inlet; 302. Heat recovery outlet; 40. Heat exchange assembly; 410. Inner swirl main pipe; 420. Inner swirl branch pipe; 50. Floating assembly; 510. Balance ball; 520. Piezoelectric spring; 60. Fixing component; 610. Elastic rope; 710. Positive arc temperature-sensing piezoelectric spring; 720. Reverse arc temperature-sensing piezoelectric spring; 80. Thermoelectric module; 810. First type of thermoelectric element; 801. Outer ring fin structure; 820. Second type of thermoelectric element; 802. Inner ring fin; 910. Device support frame; 920. Jet oscillator. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0021] This invention provides a multi-energy coupled self-driven wastewater treatment and heat recovery synergistic system, such as... Figures 1 to 18As shown, the system includes a wastewater treatment component 10, a heat recovery component 30, and a thermoelectric module 80. The wastewater treatment component 10 includes a flocculant chamber 110, a wastewater treatment chamber 120, and a flocculant particle collection chamber 130, arranged sequentially from the inside out. A flexible diaphragm switch 210 is provided on the side wall of the flocculant chamber 110, which can control the outflow of flocculant from the flocculant chamber 110 according to the fluid pressure in the wastewater treatment chamber 120. The inner wall of the flocculant particle collection chamber 130 is provided with flocculant particles. The flocculated particle capture plate 220 automatically opens when the gravitational torque generated by the accumulation of flocculated particles in the wastewater treatment chamber 120 exceeds a preset threshold, allowing the flocculated particles to enter the flocculated particle collection chamber 130. The heat recovery assembly 30 includes a heat recovery region 310 and a phase change heat storage assembly 320 disposed within the heat recovery region 310. The heat recovery inlet 301 of the heat recovery region 310 is connected to the outlet of the wastewater treatment chamber 120. The recovery outlet 302 is located at the end furthest from the wastewater treatment component 10; the phase change heat storage component 320 includes multiple phase change heat storage rods 321; each phase change heat storage rod 321 is equipped with a heat exchange component 40, which promotes heat exchange between the hot fluid and the phase change heat storage rod 321; a floating component 50 is also provided in the heat recovery zone 310, which can adjust the uniformity of the phase change material in the phase change heat storage rod 321 in the vertical direction under the action of the electrical signal of the heat exchange component 40; the heat recovery zone Within the domain 310, a fixing member 60 is also provided. The two adjacent phase change heat storage rods 321 along the height direction, as well as the phase change heat storage rods 321 and the top wall of the heat recovery area 310, are all connected by the fixing member 60. The fixing member 60 can cause the phase change heat storage rods 321 to swing horizontally to adjust the uniformity of the phase change material within the phase change heat storage rods 321. Thermoelectric module 80 is located within the heat recovery assembly 30. The thermoelectric module 80 is used to supply power to the multi-energy coupled self-driven wastewater treatment and heat recovery collaborative system.

[0022] In this embodiment, the wastewater treatment component 10 adopts a nested structure design, with a flocculant chamber 110, a wastewater treatment chamber 120, and a flocculant particle collection chamber 130 nested sequentially from the inside out, forming a layered and collaborative treatment space. This replaces the traditional independent reaction tank and sedimentation tank, significantly reducing the equipment's footprint. The side wall of the flocculant chamber 110 is equipped with a flexible diaphragm switch 210, whose core function is to drive the flexible diaphragm switch 210 according to the fluid pressure in the wastewater treatment chamber 120, thereby achieving adaptive and precise flocculant dosing and solving the problem of coarse flocculant dosing by traditional fixed flow pumps. The inner wall of the flocculant particle collection chamber 130 is equipped with a flocculant particle capture plate 220, which is used to control the flocculant particles formed in the wastewater treatment chamber 120 to enter the flocculant particle collection chamber 130. The flocculant particle capture plate 220 is triggered by the gravitational torque of the flocculant particles, achieving self-triggered solid-liquid separation, replacing the traditional passive gravity sedimentation and improving separation efficiency. The heat recovery assembly 30 includes a heat recovery zone 310 and a phase change heat storage assembly 320. The heat recovery inlet 301 of the heat recovery zone 310 is connected to the outlet of the sewage treatment chamber 120 to ensure that the fluid containing low-grade heat energy after sewage treatment can directly enter the heat recovery zone 310, avoiding heat energy loss during transmission. The heat recovery outlet 302 is located at the end away from the sewage treatment assembly 10 to ensure that the fluid after heat exchange is discharged smoothly. The phase change heat storage component 320 is composed of multiple phase change heat storage rods 321. Compared with the traditional integral phase change heat storage structure, the decentralized phase change heat storage rod 321 design can increase the heat exchange area and alleviate the inherent bottleneck of poor thermal conductivity of phase change materials. Each phase change heat storage rod 321 is equipped with a heat exchange component 40, which is specifically used to promote heat transfer between the heat fluid and the phase change heat storage rod 321 and enhance the heat exchange effect. In addition, a floating component 50 and a fixing component 60 are also provided in the heat recovery area 310. The floating component 50 adjusts the uniformity of the phase change material in the phase change heat storage rod 321 in the vertical direction under the action of the heat exchange component 40. The fixing component 60 is used to connect multiple phase change heat storage rods 321 and the top wall of the heat recovery area 310, so that the phase change heat storage rods 321 swing in the horizontal direction to adjust the uniformity of the phase change material. The two work together to solve the problem of uneven distribution of phase change material caused by volume change during heat storage / release, and further improve the heat exchange efficiency. The thermoelectric module 80 is located inside the heat recovery component 30. Its core function is to convert the energy generated during the heat recovery process into electrical energy, specifically powering the multi-energy coupled self-driven wastewater treatment and heat recovery collaborative system of this application. For example, it powers units such as the jet oscillator 920 and the piezoelectric spring 520, realizing the self-circulation of energy within the system, reducing dependence on external power input, and improving energy utilization efficiency. In summary, this embodiment integrates the wastewater treatment component 10 and the heat recovery component 30 together, improving wastewater treatment and heat recovery efficiency while also achieving self-sufficiency of energy within the system, further reducing the overall energy consumption of the system, and meeting the application requirements of energy conservation and carbon reduction.

[0023] As an optional solution in this embodiment, refer to Figure 1 and Figure 2 Both the wastewater treatment chamber 120 and the flocculated particle collection chamber 130 have a conical structure. The heat recovery component 30 is connected to the downstream end of the conical structure. Wastewater inlet 1201 and effluent inlet 1301 are respectively provided at the ends of the wastewater treatment chamber 120 and the flocculated particle collection chamber 130 away from the heat recovery component 30. Flocculated particle outlet 1302 and flocculated particle heat recovery outlet 1303 are respectively provided at the end of the flocculated particle collection chamber 130 near the heat recovery component 30. The flocculated particle heat recovery outlet 1303 is configured to be located at the flocculated particle outlet 1... Before 302 is turned on, it is turned on first to prioritize the recovery of heat energy in the interstitial liquid of the flocculated particles. The heat recovery outlet 1303 of the flocculated particles is connected to the heat recovery component 30, and a filter screen (not shown in the figure) is provided on the heat recovery outlet 1303 of the flocculated particles. The sewage treatment chamber 120 is also provided with a sewage chute 1202 connected to the sewage inlet 1201. The sewage chute 1202 has a spiral descending groove structure. The flocculated liquid chamber 110 has a cylindrical structure, and the end of the flocculated liquid chamber 110 away from the heat recovery component 30 is provided with a flocculated liquid inlet 1101.

[0024] Among them, the sewage treatment chamber 120 serves as the core reaction and separation channel, and is in the shape of a gradually widening cone. A semi-circular sewage inlet 1201 is provided at the far left front end, which is connected to the water inlet pipe. The sewage treatment chamber 120 is equipped with a unique sewage slide 1202, which is a spiral descending groove structure, resembling a rotating slide, used to guide and structure the sewage flow field.

[0025] The flocculation chamber 110 is located on the innermost side and is cylindrical, with a circular flocculation inlet 1101 on the far left.

[0026] The flocculation particle collection chamber 130 surrounds the wastewater treatment chamber 120 and is also tapered in shape to collect the separated flocculated particles. Its cross-section gradually widens along the fluid flow direction, facilitating the settling and enrichment of the flocculated particles. A flocculation particle outlet 1302 is located at its bottom end, and a discharging liquid inlet 1301 is located on the far left to introduce external driving fluid (or partially treated clarified liquid). This assists in the directional transport of flocculated particles to the end and creates flow conditions for subsequent heat recovery. A flocculation particle heat recovery outlet 1303 is located at the end of the flocculation particle collection chamber 130 and is covered with a fine filter screen to intercept flocculated particles while allowing the clarified liquid to carry heat out. The pipeline of this flocculation particle heat recovery outlet 1303 is directly connected to the subsequent heat recovery area 310. The flocculation particle outlet 1302 is located on the lower surface of the end of the flocculation particle collection chamber 130 for the final discharge of flocculated particles that have released heat. When the flocculent particles accumulate to a certain extent at the front end of the flocculent particle collection chamber 130, the flocculent particle heat recovery outlet 1303 opens first. Driven by the auxiliary fluid introduced through the effluent inlet 1301, the high-temperature clear liquid carried between the flocculent particles passes through the filter screen and enters the heat recovery pipeline, where it is transported to the subsequent heat recovery zone 310 for heat extraction. During this stage, the flocculent particles themselves are trapped by the filter screen and remain in the collection chamber. After the recoverable heat energy between the flocculent particles has been fully extracted or the heat recovery outlet 302 is closed, the flocculent particle outlet 1302 then opens. Under the continuous flushing of the effluent and the action of gravity, the flocculent particles accumulated in the flocculent particle collection chamber 130 are directionally discharged from the system and enter the subsequent sludge treatment unit.

[0027] As an optional solution in this embodiment, refer to Figures 4 to 6 The heat exchange assembly 40 includes an inner swirling main pipe 410 and a plurality of inner swirling branch pipes 420 located on the outer periphery of the inner swirling main pipe 410. The inlet of the inner swirling branch pipe 420 is located on the side close to the outer wall of the phase change heat storage rod 321, and the outlet of the inner swirling branch pipe 420 is connected to the inner swirling main pipe 410. The phase change heat storage rod 321 includes an outer shell 31 and a phase change material disposed within the outer shell 31. The outer shell 31 includes a plurality of adjacently arranged shell assemblies, and the shell assemblies include a first expandable deformable outer shell 3 arranged sequentially. 11. A first fixed outer shell 312, a second fixed outer shell 313, and a second expandable deformable outer shell 314, wherein the first expandable deformable outer shell 311 and the first fixed outer shell 312 are connected, the second fixed outer shell 313 and the second expandable deformable outer shell 314 are connected, and the first fixed outer shell 312 and the second fixed outer shell 313 abut against each other; the outer shell 31 can adjust the opening and closing of the inlet of the inner swirling branch pipe 420 according to the phase change state of the phase change heat storage rod 321 so that the fluid can form a swirling flow that enhances heat transfer.

[0028] The internal swirling branch pipe 420, which can be opened and closed periodically, is achieved by the periodic arrangement of the shell assembly of the phase change heat storage rod 321. Specifically, after the phase change heat storage rod 321 absorbs heat, it expands and deforms. The inlet of the internal swirling branch pipe 420 is controlled by the self-driven motion of the first expandable deformable shell 311 and / or the second expandable deformable shell 314, which allows the hot fluid to enter the internal swirling main pipe 410 from the inlet of the internal swirling branch pipe 420. During the flow, it fully contacts the phase change heat storage rod 321, thereby improving the heat exchange efficiency. The inner swirling main pipe 410 is embedded in the innermost ring of the phase change heat storage rod 321, and its inner surface is spiral-patterned. The inner swirling branch pipes 420 are uniformly arranged in a ring at 60° intervals on the wall of the phase change heat storage rod 321, forming a connection channel between the heat exchange fluid in the heat recovery area 310 and the inner swirling main pipe 410. The inlet of the inner swirling branch pipe 420 is a reducing tube structure, which helps to enhance the internal swirling velocity of the heat exchange fluid and accelerate the rate at which it enters the inner swirling main pipe 410. The outlet of the inner swirling branch pipe 420 is a widening tube structure, which slows down the speed at which the heat exchange fluid is about to enter the inner swirling main pipe 410, increases the contact time between the heat exchange fluid and the phase change heat storage rod 321, and promotes heat exchange.

[0029] As an optional solution in this embodiment, refer to Figures 8 to 10 The flexible diaphragm switch 210 includes a mounting frame 21 and two flexible diaphragms 211 disposed within the mounting frame 21. A semi-circular pleat 212 is formed between the flexible diaphragms 211 and the mounting frame 21. Initially, the multi-energy coupled self-driven wastewater treatment and heat recovery co-operated system is not running, there is no pressure in the flocculation chamber 110, and the flexible diaphragms 211 are tightly attached to the opening due to their own elasticity, and are in a closed state. When the multi-energy coupled self-driven wastewater treatment and heat recovery co-operated system is started, wastewater flows in the wastewater treatment chamber 120, generating a hydrostatic pressure P_out inside the wastewater treatment chamber 120. Simultaneously, the flocculation pump starts, establishing a hydrostatic pressure P_in within the flocculation chamber 110. When P_in > P_out, a positive pressure difference is generated inside and outside the flexible diaphragm 211, causing it to bulge outwards, and is in an open state. The greater the pressure difference, the greater the opening degree of the flexible diaphragm switch 210.

[0030] The flexible diaphragm switch 210 is fixed to the side wall of the flocculation chamber 110 via the mounting frame 21. Wastewater enters through the wastewater inlet 1201 and moves forward along the wastewater chute 1202. Flocculation solution is injected through the flocculation inlet 1101. When the wastewater reaches the corresponding flexible diaphragm switch 210 in the flocculation chamber 110, the flexible diaphragm switch 210 is automatically controlled by the fluid pressure difference across the flexible diaphragm 211, following a simple physical principle: a larger pressure difference results in a larger opening, and a smaller pressure difference results in a smaller opening. Specifically, in the initial state: when the system is not running, there is no pressure in the flocculation chamber 110, and the flexible diaphragm 211 is tightly closed by its own elasticity, preventing backflow of external wastewater. Subsequently, a pressure difference is established, and the system starts. Wastewater begins to flow in the wastewater treatment chamber 120, generating a hydrostatic pressure P_out outside the flexible diaphragm switch 210. Simultaneously, the flocculant pump starts, establishing a static pressure P_in within the flocculant chamber 110. If P_in > P_out, a positive pressure difference is generated across the flexible diaphragm 211, causing it to bulge outwards (towards the wastewater side), opening the diaphragm and allowing the flocculant to flow out. The degree of bulging (opening) of the flexible diaphragm 211 is directly related to the pressure difference: the greater the pressure difference, the greater the opening and the greater the flow rate; as the pressure difference decreases, the opening automatically retracts under elastic action. The flexible diaphragm 211 eventually stabilizes at an equilibrium opening. At this opening, the throttling effect of the opening causes the local pressure drop generated by the outflowing flocculant to reach equilibrium with (P_in - P_out). At this point, the flow rate is stable. Because P_out varies at different locations within the wastewater treatment chamber 120 (lower pressure where flow velocity is high, and higher pressure where flow velocity is low), flow distribution is naturally achieved: in areas with high wastewater flow velocity, P_out is small, resulting in a larger pressure difference for the same P_in. This allows for a larger opening of the flexible diaphragm 211, automatically injecting more flocculant to match the mixing requirements of high flow velocities; conversely, injection is reduced when flow velocities are low. Through the injection of flocculant, the wastewater is uniformly mixed and reacted with it, thereby coagulating impurities in the wastewater into flocculent particles.

[0031] Figure 8 In the middle, the semi-circular fold 212 is the deformation area of ​​the flexible diaphragm 211, as shown in the reference. Figure 2 Multiple flexible diaphragm switches 210 are provided along the outer wall of the flocculation chamber 110.

[0032] As an optional solution in this embodiment, refer to Figures 11 to 14The flocculant capture plate 220 includes a micro hinge 221 and a grid plate 222 disposed on the micro hinge 221. The micro hinge 221 is disposed on the side wall of the flocculant collection chamber 130. The grid plate 222 is rotatably disposed on the micro hinge 221, so that the grid plate 222 can switch between a closed state and an open state. When the grid plate 222 is in the open state, flocculant particles can enter the flocculant collection chamber 130 through the grid plate 222. When the gravitational torque generated by the flocculant particles accumulated on the inner wall of the sewage treatment chamber 120 exceeds the preset reset torque of the micro hinge 221, the flocculant capture plate 220 automatically rotates and opens in the direction of the flocculant collection chamber 130.

[0033] In this process, wastewater carrying flocculent particles flows through the wastewater treatment chamber 120 as the wastewater fluid moves. When the fluid encounters the grid plate 222, the flow direction is forced to change. Larger flocculent particles, due to their greater inertia, tend to maintain their original direction of motion and are thus captured by the grid plate 222. When the accumulated flocculent particles reach a certain mass, the resulting gravitational torque exceeds the preset reset torque of the micro-hinge 221. The grid plate 222 then instantly rotates and opens around the axis of the micro-hinge 221, causing it to rotate outwards and pour the accumulated flocculent particles into the flocculent particle collection chamber 130. After the force is released, the grid plate 222 automatically resets and closes under the action of the micro-hinge 221 and its own gravity, awaiting the next capture. This process achieves efficient, intermittent sludge discharge triggered by flocculent particle enrichment, greatly reducing the mixing of clarified liquid. (Refer to...) Figure 2 Multiple flocculant capture plates 220 are provided along the side wall of the flocculant collection chamber 130.

[0034] As an optional solution in this embodiment, refer to Figure 15 and Figure 16 The multi-energy coupled self-driven wastewater treatment and heat recovery synergistic system also includes: a positive arc temperature-sensing piezoelectric spring 710 and a negative arc temperature-sensing piezoelectric spring 720. One end of the positive arc temperature-sensing piezoelectric spring 710 is connected to the first expandable deformable shell 311, and the other end is connected to the first fixed shell 312. One end of the negative arc temperature-sensing piezoelectric spring 720 is connected to the second fixed shell 313, and the other end is connected to the second expandable deformable shell 314. The electrical signals generated by the positive arc temperature-sensing piezoelectric spring 710 and / or the negative arc temperature-sensing piezoelectric spring 720 can trigger the piezoelectric spring 520 in the floating component 50 to perform contraction and extension movements, thereby driving the floating component 50 to work.

[0035] The core characteristics of the positive arc temperature-sensing piezoelectric spring 710 and the negative arc temperature-sensing piezoelectric spring 720 are that they can change their arc according to temperature changes (i.e., the phase change state of the phase change material) and generate piezoelectric signals at the same time, realizing the integration of temperature sensing and signal triggering. The positive arc temperature-sensing piezoelectric spring 710 and the negative arc temperature-sensing piezoelectric spring 720 can trigger the floating component 50 to work individually or together. Specifically, when the phase change material inside the phase change heat storage rod 321 undergoes a phase change (such as changing from solid to liquid) and the temperature changes, the positive arc temperature-sensing piezoelectric spring 710 and the negative arc temperature-sensing piezoelectric spring 720 will undergo corresponding arc deformation according to the temperature change. During the deformation process, a piezoelectric signal is generated, which is transmitted to the floating component 50, triggering the deformation of the piezoelectric spring 520, which drives the balance ball 510 to perform loading or unloading operations, adjusting the uniformity of the phase change material, thereby improving the heat exchange efficiency. At the same time, the above process does not require an external control system and can achieve energy self-circulation, further reducing external energy consumption and improving the energy efficiency of the multi-energy coupled self-driven wastewater treatment and heat recovery synergistic system.

[0036] As an optional solution in this embodiment, refer to Figure 4 and Figure 5 The floating component 50 includes a balance ball 510 and a piezoelectric spring 520. The piezoelectric spring 520 is arranged vertically. One end of the piezoelectric spring 520 is connected to the top wall of the heat recovery area 310 near the heat recovery inlet 301. The other end of the piezoelectric spring 520 is connected to the balance ball 510. The positive arc temperature-sensing piezoelectric spring 710 and / or the negative arc temperature-sensing piezoelectric spring 720 can control the balance ball 510 to load or unload the phase change heat storage rod 321.

[0037] The balance ball 510 is positioned at the front end of the phase change heat storage rod 321 and is tangential to it. The floating component 50 is driven by a piezoelectric spring 520. One end of the piezoelectric spring 520 is connected to the balance ball 510, and the other end is connected to the wall of the heat recovery area 310. The piezoelectric spring 520 will contract and stretch based on the periodic signals of the positive arc temperature-sensing piezoelectric spring 710 and / or the negative arc temperature-sensing piezoelectric spring 720, thereby loading and unloading the balance ball 510, which improves the temperature uniformity and heat exchange efficiency of the internal phase change material.

[0038] The piezoelectric spring 520 features low energy consumption and fast response speed. It does not require continuous consumption of high-grade electrical energy and only triggers deformation when adjustment is needed. Compared with traditional active enhancement methods such as mechanical stirring, it can significantly reduce energy consumption and improve the economic efficiency of heat recovery. At the same time, the fast response speed can promptly respond to changes in the distribution of phase change materials, ensuring the stability of heat exchange efficiency.

[0039] The floating component 50 has a compact structure. The balance ball 510 is suspended in the hot fluid and will not significantly obstruct the flow of the hot fluid, thus avoiding the problems of increased fluid resistance and increased energy consumption caused by the setting of the floating component 50. The vertical setting of the floating component 50 can make full use of the space of the heat recovery area 310 without taking up extra space, ensuring the compactness of the heat recovery component 30.

[0040] As an optional solution in this embodiment, refer to Figure 4 , Figure 5 and Figure 7 The fastener 60 includes multiple elastic ropes 610, each elastic rope 610 is arranged in a vertical direction, one end of a portion of the elastic ropes 610 is connected to the top of the heat recovery area 310, and the other end is connected to the outer wall of the phase change heat storage rod 321; another portion of the elastic ropes 610 is used to connect two adjacent phase change heat storage rods 321 arranged on the same vertical line.

[0041] When the flow rate of the clear liquid changes, the phase change heat storage rod 321 will spontaneously swing left and right (horizontal direction) due to the connection of the elastic rope 610. In addition, the loading and unloading of the balance ball 510 can also cause the phase change heat storage rod 321 to swing up and down (vertical direction), which promotes the temperature uniformity of the internal phase change material and the improvement of heat exchange efficiency.

[0042] Meanwhile, a flexible network of elastic ropes 610 is suspended in the heat recovery zone 310, giving the phase change heat storage rod 321 the ability to swing freely in the clear stream. Furthermore, the suspension arrangement of the phase change heat storage rod 321 can be designed through structural and topological analysis to ensure uniform heat distribution across the same axial cross section, thereby improving energy utilization.

[0043] As an optional solution in this embodiment, refer to Figure 18 The thermoelectric module 80 includes a first type of thermoelectric element 810 and a second type of thermoelectric element 820. The first type of thermoelectric element 810 is disposed on the inner wall of the outer shell 31 of the phase change heat storage rod 321, and the second type of thermoelectric element 820 is disposed on the outer wall of the inner swirl main tube 410. Both the first type of thermoelectric element 810 and the second type of thermoelectric element 820 are used to generate electricity by the difference between the phase change temperature and the fluid temperature during the charging / discharging process.

[0044] In this thermoelectric module 80, the first type of thermoelectric element 810 is encased in an outer ring fin structure 801 and uniformly arranged in a 90° annular pattern along the outer ring. The second type of thermoelectric element 820 is encased in several inner ring fins 802 and uniformly arranged in a 90° annular pattern along the inner ring. These elements are axially and uniformly arranged in an array on the phase change heat storage rod 321. The inner ring fins 802 are longer than the outer ring fin structure 801, which is more conducive to accelerating the heat storage process of the phase change heat storage rod 321. Furthermore, one side of the first type of thermoelectric element 810 has good thermal contact with the phase change material, while the other side... On one side, heat exchange occurs between the outer shell 31 of the phase change heat storage rod 321 and the heat transfer fluid in the heat recovery area 310. On the other side, one side of the second type of thermoelectric element 820 is in good thermal contact with the phase change material, and on the other side, heat exchange occurs between the inner swirling main pipe 410 and the heat transfer fluid in the heat recovery area 310. This allows for the generation of electricity by utilizing the temperature difference between the phase change and the fluid during the charging / discharging process. All of the above electrical energy is collected in the system energy management circuit, and after processing, it powers units such as the jet oscillator 920 and the piezoelectric spring 520 in the system, achieving self-sufficiency in operating energy.

[0045] As an optional solution in this embodiment, refer to Figure 1 and Figure 17 The multi-energy coupled self-driven wastewater treatment and heat recovery synergistic system also includes: a device support frame 910; the device support frame 910 is used to support the wastewater treatment component 10 and the heat recovery component 30; an insulation layer is provided on the wall of the heat recovery component 30; and a jet oscillator 920 is provided on the heat recovery inlet 301.

[0046] Among them, the device support frame 910 serves as the overall support structure of this embodiment, which can effectively fix the system and prevent displacement or damage caused by factors such as vibration and gravity during system operation, thereby improving the operational stability of the system and extending the service life of the equipment. At the same time, the support frame facilitates the overall installation, disassembly and maintenance of the system, reduces the difficulty of installation and maintenance, and improves the practicality of the system.

[0047] The aforementioned heat recovery zone 310 is located at the rear end of the entire device. Its walls are insulated, effectively preventing heat loss and ensuring that low-grade heat energy in the thermal fluid is fully transferred to the phase change heat storage material, reducing heat waste and further improving heat recovery efficiency. Simultaneously, the insulation layer lowers the temperature of the outer wall of the heat recovery component 30, preventing burns to operators and enhancing operational safety while reducing potential hazards. The jet turbulent 920 agitates the thermal fluid entering the heat recovery zone 310, breaking the laminar flow and ensuring uniform distribution. This allows for full contact with the multiple phase change heat storage rods 321, preventing insufficient heat exchange due to localized fluid stagnation, further enhancing heat exchange, shortening the heat storage / release cycle, improving the recovery efficiency of low-grade heat energy, and addressing the pain point of uneven fluid distribution in traditional heat recovery processes.

[0048] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some of the technical features; and all such modifications and substitutions should fall within the protection scope of the appended claims of the present invention.

Claims

1. A multi-energy coupled self-driven wastewater treatment and heat recovery synergistic system, characterized in that, include: A wastewater treatment assembly includes, from the inside out, a flocculant chamber, a wastewater treatment chamber, and a flocculant particle collection chamber. A flexible diaphragm switch is installed on the side wall of the flocculant chamber, which controls the outflow of flocculant from the chamber based on the fluid pressure within the wastewater treatment chamber. A flocculant particle collection plate is installed on the inner wall of the collection chamber, which automatically opens when the gravitational torque generated by the accumulation of flocculant particles in the wastewater treatment chamber exceeds a preset threshold, allowing the flocculant particles to enter the collection chamber. A heat recovery assembly includes a heat recovery zone and a phase change heat storage assembly disposed within the heat recovery zone. The heat recovery inlet of the heat recovery zone is connected to the outlet of the wastewater treatment chamber, and the heat recovery outlet of the heat recovery zone is located at one end away from the wastewater treatment assembly. The phase change heat storage assembly includes multiple phase change heat storage rods. Each phase change heat storage rod is provided with a heat exchange component, which is used to promote heat exchange between the hot fluid and the phase change heat storage rod. A floating component is also provided within the heat recovery zone. Under the action of an electrical signal from the heat exchange component, the floating component can adjust the uniformity of the phase change material within the phase change heat storage rod in the vertical direction. A fixing member is also provided within the heat recovery zone. Adjacent phase change heat storage rods are connected to each other, and the phase change heat storage rods are connected to the top wall of the heat recovery zone through the fixing member. The fixing member can cause the phase change heat storage rods to swing horizontally to adjust the uniformity of the phase change material within the phase change heat storage rods. A thermoelectric module is disposed within the heat recovery assembly, and the thermoelectric module is used to supply power to the multi-energy coupled self-driven wastewater treatment and heat recovery collaborative system; The heat exchange assembly includes an inner swirling main pipe and a plurality of inner swirling branch pipes located on the outer periphery of the inner swirling main pipe. The inlet of the inner swirling branch pipe is located on the side close to the outer wall of the phase change heat storage rod, and the outlet of the inner swirling branch pipe is connected to the inner swirling main pipe. The phase change heat storage rod includes an outer shell and a phase change material disposed within the outer shell; the outer shell includes a plurality of adjacent shell components, each shell component including a first expandable deformable shell, a first fixed shell, a second fixed shell and a second expandable deformable shell arranged sequentially, the first expandable deformable shell and the first fixed shell being connected, the second fixed shell and the second expandable deformable shell being connected, and the first fixed shell and the second fixed shell abutting against each other; The outer shell can adjust the opening and closing of the inlet of the inner swirling branch pipe according to the phase change state of the phase change heat storage rod, so that the fluid can form a swirling flow that enhances heat transfer.

2. The multi-energy coupled self-driven wastewater treatment and heat recovery synergistic system according to claim 1, characterized in that, Both the wastewater treatment chamber and the flocculant collection chamber are conical in shape. The heat recovery component is connected to the downstream end of the conical structure. The wastewater treatment chamber and the flocculant collection chamber, respectively, are provided with a wastewater inlet and a discharging liquid inlet at the ends away from the heat recovery component. The flocculant collection chamber is provided with a flocculant outlet and a flocculant heat recovery outlet at the end near the heat recovery component. The flocculant heat recovery outlet is configured to open before the flocculant outlet opens to prioritize the recovery of heat energy in the interstitial liquid of the flocculants. The flocculant heat recovery outlet is connected to the heat recovery component and is equipped with a filter screen. The sewage treatment chamber is also equipped with a sewage chute that communicates with the sewage inlet. The sewage chute has a spirally descending groove structure. The flocculation chamber has a cylindrical structure, and a flocculation inlet is provided at the end of the flocculation chamber away from the heat recovery component.

3. The multi-energy coupled self-driven wastewater treatment and heat recovery synergistic system according to claim 1, characterized in that, The flexible diaphragm switch includes a mounting frame and two flexible diaphragms disposed within the mounting frame; there is a semi-circular pleat between the flexible diaphragms and the mounting frame; In the initial state, the multi-energy coupled self-driven wastewater treatment and heat recovery synergistic system is not running, there is no pressure in the flocculant chamber, and the flexible membrane is tightly attached to the opening under its own elasticity and is in a closed state. When the multi-energy coupled self-driven wastewater treatment and heat recovery synergistic system is started, wastewater flows in the wastewater treatment chamber, generating a hydrostatic pressure P_out inside the wastewater treatment chamber. At the same time, the flocculant pump starts, establishing a hydrostatic pressure P_in in the flocculant chamber. When P_in > P_out, a positive pressure difference is generated inside and outside the flexible diaphragm, causing it to bulge outward and be in an open state. The greater the pressure difference, the greater the opening degree of the flexible diaphragm.

4. The multi-energy coupled self-driven wastewater treatment and heat recovery synergistic system according to claim 3, characterized in that, The flocculant capture plate includes a micro hinge and a grid plate disposed on the micro hinge. The micro hinge is disposed on the side wall of the flocculant collection chamber. The grid plate is rotatably disposed on the micro hinge, so that the grid plate can switch between a closed state and an open state. When the grid plate is in the open state, the flocculant particles can enter the flocculant collection chamber through the grid plate. When the gravitational torque generated by the flocculated particles accumulated on the inner wall of the wastewater treatment chamber exceeds the preset reset torque of the micro-hinge, the flocculated particle capturing plate automatically rotates and opens towards the flocculated particle collecting chamber.

5. The multi-energy coupled self-driven wastewater treatment and heat recovery synergistic system according to claim 4, characterized in that, The multi-energy coupled self-driven wastewater treatment and heat recovery synergistic system further includes: a positive arc temperature-sensing piezoelectric spring and a negative arc temperature-sensing piezoelectric spring. One end of the positive arc temperature-sensing piezoelectric spring is connected to the first expandable deformable shell, and the other end is connected to the first fixed shell. One end of the negative arc temperature-sensing piezoelectric spring is connected to the second fixed shell, and the other end is connected to the second expandable deformable shell. The electrical signals generated by the positive arc temperature-sensing piezoelectric spring and / or the negative arc temperature-sensing piezoelectric spring can trigger the piezoelectric spring in the floating component to contract and stretch, thereby driving the floating component to work.

6. The multi-energy coupled self-driven wastewater treatment and heat recovery synergistic system according to claim 5, characterized in that, The floating component includes a balance ball and a piezoelectric spring. The piezoelectric spring is arranged vertically, with one end connected to the top wall of the heat recovery area near the heat recovery inlet, and the other end connected to the balance ball. The positive arc temperature-sensing piezoelectric spring and / or the negative arc temperature-sensing piezoelectric spring can control the balance ball to load or unload the phase change heat storage rod.

7. The multi-energy coupled self-driven wastewater treatment and heat recovery synergistic system according to claim 6, characterized in that, The fastener includes multiple elastic ropes, each of which is arranged vertically. One end of a portion of the elastic ropes is connected to the top of the heat recovery zone, and the other end is connected to the outer wall of the phase change heat storage rod. Another part of the elastic rope is used to connect two phase change heat storage rods that are arranged adjacently on the same vertical line.

8. The multi-energy coupled self-driven wastewater treatment and heat recovery synergistic system according to claim 7, characterized in that, The thermoelectric module includes a first type of thermoelectric element and a second type of thermoelectric element. The first type of thermoelectric element is disposed on the inner wall of the outer shell of the phase change heat storage rod, and the second type of thermoelectric element is disposed on the outer wall of the inner swirling main tube. Both the first type of thermoelectric element and the second type of thermoelectric element are used to generate electricity by the difference between the phase change temperature and the fluid temperature during the charging / discharging process.

9. The multi-energy coupled self-driven wastewater treatment and heat recovery synergistic system according to claim 1, characterized in that, The multi-energy coupled self-driven wastewater treatment and heat recovery synergistic system also includes: a device support frame; The device support frame is used to support the wastewater treatment component and the heat recovery component; an insulation layer is provided on the wall of the heat recovery component; and a jet agitator is provided at the heat recovery inlet.

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