Lithium battery wastewater waste heat recovery system

Abstract

The application discloses a lithium battery wastewater waste heat recovery system, which comprises a wastewater pipeline, a heating pipeline, a heat exchanger and an opening and closing assembly. The heat exchanger comprises a first heat exchange chamber and a second heat exchange chamber. The first heat exchange chamber and the second heat exchange chamber are both provided with a first pipeline in communication with the wastewater pipeline and a second pipeline in communication with the heating pipeline, and heat exchange is adapted to be carried out between the first pipeline and the second pipeline. The opening and closing assembly is arranged in the second heat exchange chamber. The opening and closing assembly comprises an opening and closing member, a temperature control element and a reset element. The opening and closing member is arranged in the first pipeline and the second pipeline. The temperature control element is in communication with the first pipeline. The temperature control element is in transmission connection with the opening and closing member and the reset element. When the temperature of the wastewater is not less than a preset temperature, the temperature control element drives the opening and closing member to open the first pipeline and the second pipeline. When the temperature of the wastewater is less than the preset temperature, the reset element drives the temperature control element to drive the opening and closing member to close the first pipeline and the second pipeline. The wastewater is used to heat a liquid to be heated through the first heat exchange chamber and the second heat exchange chamber.

Description

Technical Field

[0001] This application relates to the field of wastewater waste heat recovery, and in particular to a lithium battery wastewater waste heat recovery system. Background Technology

[0002] In related technologies, brine materials need to be heated before entering the lithium carbonate MVR process system. Traditional heating methods generally use steam to directly heat the brine materials, which, although effective in raising the temperature, consumes a lot of energy. In the lithium carbonate MVR process, some condensate is cooled by a cooling tower to reduce the energy consumption of heating the brine materials. However, the temperature of the condensate fluctuates. When the condensate temperature is too high, although the condensate can effectively heat the brine materials, some residual heat in the condensate is not fully utilized, resulting in heat loss and reducing the overall heat recovery efficiency. Summary of the Invention

[0003] In order to make full use of the waste heat of condensate and improve the overall heat recovery rate, this application provides a lithium battery wastewater waste heat recovery system.

[0004] The lithium battery wastewater waste heat recovery system provided in this application adopts the following technical solution:

[0005] A lithium battery wastewater waste heat recovery system includes: a wastewater pipeline and a heating pipeline, wherein the wastewater pipeline is used to transport wastewater and the heating pipeline is used to transport liquid to be heated; a heat exchanger, the heat exchanger including a first heat exchange chamber and a second heat exchange chamber, each of the first heat exchange chamber and the second heat exchange chamber being provided with a first pipeline and a second pipeline, the first pipeline being connected to the wastewater pipeline and the second pipeline being connected to the heating pipeline, the first pipeline and the second pipeline being adapted to perform heat exchange; an opening and closing assembly, the opening and closing assembly being disposed in the second heat exchange chamber, the opening and closing assembly including an opening and closing element, a temperature control element, and a reset element, the opening and closing element being disposed in the first pipeline and the second pipeline, the temperature control element being connected to the first pipeline, and the temperature control element being pulsatorically connected to both the opening and closing element and the reset element; when the temperature of the wastewater in the first pipeline is not lower than a preset temperature, the temperature control element drives the opening and closing element to open the first pipeline and the second pipeline; when the temperature of the wastewater in the first pipeline is lower than the preset temperature, the reset element drives the temperature control element to drive the opening and closing element to close the first pipeline and the second pipeline.

[0006] By adopting the above technical solution, opening and closing devices are installed in the first and second pipes within the second heat exchange chamber. A temperature control device opens or closes the first and second pipes in the second heat exchange chamber based on the temperature of the wastewater in the first pipe. When the temperature of the wastewater in the first pipe is not lower than a preset temperature, the temperature control device drives the opening and closing devices to open the first and second pipes in the second heat exchange chamber. When the temperature of the wastewater in the first pipe is lower than the preset temperature, a reset device drives the temperature control device to close the first and second pipes in the second heat exchange chamber. Compared with existing technologies, when the wastewater temperature is not lower than the preset temperature, the wastewater heats the liquid to be heated through the first and second heat exchange chambers, thereby maximizing the utilization of the wastewater's residual heat and improving the overall heat recovery rate.

[0007] Preferably, a third pipeline is provided in the second heat exchange chamber, the third pipeline is connected to the first pipeline located in the second heat exchange chamber, the temperature control device includes a housing and a driving member, the housing is disposed in the third pipeline and is adapted to contact the wastewater in the first pipeline, the housing defines an accommodating space and a driving channel, the driving channel is connected to the accommodating space, the accommodating space is used to accommodate a thermosensitive medium adapted to thermal expansion and contraction, the driving member is movably disposed in the driving channel and its end extends out of the third pipeline, the reset member is elastically deformable and disposed between the driving member and the inner peripheral wall of the second heat exchange chamber, the driving member is drivenly connected to the opening and closing member and the reset member;

[0008] When the thermosensitive medium expands, it drives the driving member to move away from the housing, so that the driving member drives the opening and closing member to open the first pipeline and the second pipeline. When the thermosensitive medium contracts, the reset member drives the driving member to move closer to the housing, so that the driving member drives the opening and closing member to close the first pipeline and the second pipeline.

[0009] By adopting the above technical solution, when the temperature of the wastewater in the first pipeline is not lower than the preset temperature, the thermosensitive medium expands. Then, the thermosensitive medium drives the driving component to move away from the housing along the driving channel. The driving component then drives the opening and closing component to open the first and second pipelines. When the temperature of the wastewater in the first pipeline is lower than the preset temperature, the thermosensitive medium contracts. The reset component drives the driving component to move closer to the housing along the driving channel. The driving component then drives the opening and closing component to close the first and second pipelines. This achieves the technical effect of opening or closing the corresponding first and second pipelines through the temperature control element and the reset component driving the opening and closing component.

[0010] Preferably, the inner peripheral wall of the second heat exchange chamber is provided with a guide member, the guide member is provided with a guide groove and a guide hole, the guide hole is located in the guide groove, the guide hole forms a guide notch in the inner peripheral wall of the guide groove, the drive member extends into the guide groove and is guided and engaged with the guide groove, the reset member is provided in the guide hole, the reset member is elastically deformable and disposed between the drive member and the bottom wall of the guide hole, and the guide hole and the reset member are guided and engaged.

[0011] By adopting the above technical solution, the driving component and the guide groove are guided and cooperated to prevent the driving component from deviating from the preset motion trajectory. This prevents the driving component from failing to drive the opening and closing component to open or close the corresponding first and second pipelines. Furthermore, by guiding and cooperating with the reset component and the guide hole, the reset component is prevented from deviating from the preset motion trajectory when the driving component compresses the reset component and when the reset component extends and recovers. This prevents the reset component from failing to drive the driving component to move closer to the housing, thereby improving the motion stability of the driving component.

[0012] Preferably, the opening and closing component includes a first sealing part, a second sealing part, and a transmission part. The first sealing part is pivotally disposed on the first pipeline, the second sealing part is pivotally disposed on the second pipeline, and the transmission part is connected between the first sealing part and the second sealing part. The outer peripheral wall of the transmission part is provided with a first meshing tooth, and the driving component is provided with a second meshing tooth. The first meshing tooth and the second meshing tooth are meshed together. The sealing part is used to open or close the corresponding pipeline.

[0013] By adopting the above technical solution, when the thermosensitive medium expands and the thermosensitive medium drives the driving component to move away from the shell, the driving component drives the transmission part to rotate around the central axis of the transmission part through the first meshing tooth and the second meshing tooth. The transmission part drives the first sealing part and the second sealing part to rotate, so that the first sealing part opens the first pipeline and the second sealing part opens the second pipeline. Thus, the technical effect of the driving component driving the opening and closing component to open the first pipeline and the second pipeline can be achieved.

[0014] Preferably, there are multiple second heat exchange chambers and multiple opening and closing components. The multiple second heat exchange chambers and multiple opening and closing components are arranged sequentially along the second direction of the heat exchanger, and the multiple second heat exchange chambers and multiple opening and closing components are arranged in a one-to-one correspondence.

[0015] By adopting the above technical solution, when the temperature of the wastewater in the wastewater pipeline is not lower than the preset temperature, the opening and closing component opens the first and second pipelines in the corresponding second heat exchange chamber. The wastewater in the wastewater pipeline flows into the first pipeline in the first heat exchange chamber and the first pipelines in multiple second heat exchange chambers at the same time. The liquid to be heated in the heating pipeline flows into the second pipeline in the first heat exchange chamber and the second pipelines in multiple second heat exchange chambers at the same time. The wastewater in the wastewater pipeline can heat the liquid to be heated through multiple second heat exchange chambers, thereby further making full use of the waste heat of the wastewater and improving the overall heat recovery rate.

[0016] Preferably, along a first direction of the heat exchanger, the heat exchanger has opposing first and second sidewalls. The first sidewall is provided with a first liquid inlet and a first liquid outlet, and the second sidewall is provided with a second liquid inlet and a second liquid outlet. Each first pipe is connected to the first liquid inlet and the second liquid outlet, and each second pipe is connected to the second liquid inlet and the first liquid outlet. The wastewater pipe is connected to both the first liquid inlet and the second liquid outlet, and the heating pipe is connected to both the second liquid inlet and the first liquid outlet. Wastewater enters the first pipe from the first liquid inlet, and the liquid to be heated enters the second pipe from the second liquid inlet.

[0017] By adopting the above technical solution, by setting the flow direction of wastewater and the flow direction of the liquid to be heated to flow in opposite directions, compared to setting the flow direction of wastewater and the liquid to be heated to flow in the same direction, when both wastewater and the liquid to be heated are flowing, the wastewater can continuously be opposite to the unheated liquid to be heated, and the wastewater can continuously heat the unheated liquid to be heated, thereby improving the waste heat utilization rate of wastewater.

[0018] Preferably, the lithium battery wastewater waste heat recovery system further includes: a ball cleaning device, which is located in the heating pipeline. The ball outlet and ball collection ends of the ball cleaning device are both connected to the heating pipeline. Along the conveying direction of the liquid to be heated, the ball cleaning device is located downstream of the heat exchanger. The connection between the ball outlet and the heating pipeline is located upstream of the heat exchanger, and the connection between the ball collection end and the heating pipeline is located downstream of the heat exchanger. The ball cleaning device is used to output balls to the second pipeline to clean impurities in the second pipeline, and to separate the balls from the liquid to be heated.

[0019] By adopting the above technical solution, the rubber ball collides with and cleans the debris adhering to the inner wall of the second pipeline. The debris and rubber ball adhering to the inner wall of the second pipeline flow into the ball receiving end of the rubber ball cleaning device through the first liquid outlet. The rubber ball cleaning device separates the rubber ball and the liquid to be heated. The rubber ball is recovered by the rubber ball cleaning device, and the liquid to be heated flows out of the rubber ball cleaning device and into the heating pipeline. This arrangement can reduce the debris adhering to the second pipeline, avoid the debris adhering to the second pipeline from reducing the heat exchange efficiency of the liquid to be heated and the wastewater, and thus improve the overall heat energy recovery rate of the lithium battery wastewater waste heat recovery system.

[0020] Preferably, the lithium battery wastewater waste heat recovery system further includes: a flow detection device and a controller. The flow detection device is located in the heating pipeline and is used to detect the flow rate of the liquid to be heated in the heating pipeline. The ball cleaning device and the flow detection device are both connected to the controller. The controller is used to control the ball cleaning device to output or stop outputting balls according to the detection signal of the flow detection device.

[0021] By adopting the above technical solution, when the flow rate of the liquid to be heated in the heating pipeline is less than the preset flow rate, the controller controls the rubber ball cleaning device to output rubber balls according to the detection signal of the flow detection device, so that the rubber balls clean the debris in multiple second pipelines, thereby avoiding the blockage of the second pipelines by the debris in the second pipelines, and thus improving the flow stability of the liquid to be heated in the heating pipeline.

[0022] Preferably, the lithium battery wastewater waste heat recovery system further includes: a conductivity detector and a controller. The conductivity detector is installed in the wastewater pipeline. Along the wastewater transport direction of the wastewater pipeline, the conductivity detector is located downstream of the heat exchanger. The conductivity detector is used to detect the conductivity of the wastewater. The conductivity detector is communicatively connected to the controller. The controller is used to issue an alarm signal based on the detection signal from the conductivity detector.

[0023] By adopting the above technical solution, when the conductivity of the wastewater is greater than or equal to the preset conductivity value, the controller sends an alarm signal based on the conductivity detection device. The alarm signal is used to prompt the operator that the first and second pipes in the heat exchanger have ruptured. The operator closes the wastewater pipe and the heating pipe according to the alarm signal, so that the wastewater pipe stops transporting wastewater and the heating pipe stops transporting the liquid to be heated.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. By installing opening and closing devices on the first and second pipes in the second heat exchange chamber, a temperature control device opens or closes the first and second pipes in the second heat exchange chamber based on the temperature of the wastewater in the first pipe. When the temperature of the wastewater in the first pipe is not lower than a preset temperature, the temperature control device drives the opening and closing device to open the first and second pipes in the second heat exchange chamber. When the temperature of the wastewater in the first pipe is lower than the preset temperature, a reset device drives the temperature control device to close the first and second pipes in the second heat exchange chamber. Compared with the prior art, when the wastewater temperature is not lower than the preset temperature, the wastewater heats the liquid to be heated through the first and second heat exchange chambers, thereby making full use of the wastewater's residual heat and improving the overall heat recovery rate.

[0026] 2. By setting the flow direction of wastewater and the flow direction of the liquid to be heated to flow in opposite directions, compared to setting the flow direction of wastewater and the liquid to be heated to flow in the same direction, when both wastewater and the liquid to be heated are flowing, the wastewater can continuously be opposite to the unheated liquid to be heated, and the wastewater can continuously heat the unheated liquid to be heated, thereby improving the waste heat utilization rate of wastewater.

[0027] 3. When the conductivity of the wastewater is greater than or equal to the preset conductivity value, the controller sends an alarm signal based on the conductivity detection device. The alarm signal is used to prompt the operator that the first and second pipes in the heat exchanger have ruptured. The operator closes the wastewater pipe and the heating pipe according to the alarm signal so that the wastewater pipe stops transporting wastewater and the heating pipe stops transporting the liquid to be heated. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of a lithium battery wastewater waste heat recovery system according to an embodiment of this application;

[0029] Figure 2 This is a schematic diagram of the heat exchanger according to the embodiments of this application;

[0030] Figure 3 This is a cross-sectional view of the heat exchanger according to an embodiment of this application;

[0031] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0032] Figure 5 This is a cross-sectional view of the heat exchanger according to an embodiment of this application from another angle;

[0033] Figure 6 yes Figure 5 Enlarged view of point B in the middle;

[0034] Figure 7 This is a schematic diagram of the guide component according to the embodiments of this application;

[0035] Figure 8 This is a cross-sectional view of the heat exchanger according to an embodiment of this application from another angle;

[0036] Figure 9 This is a cross-sectional view of the heat exchanger according to an embodiment of this application from another angle.

[0037] Explanation of reference numerals in the attached figures:

[0038] 100. Lithium battery wastewater waste heat recovery system;

[0039] 1. Wastewater piping; 2. Heating piping;

[0040] 3. Heat exchanger; 31. First heat exchange chamber; 32. Second heat exchange chamber; 321. Guide component; 3211. Guide groove; 3212. Guide hole; 3213. Guide notch; 33. First pipeline; 34. Second pipeline; 35. Third pipeline; 36. First sidewall; 361. First liquid inlet; 362. First liquid outlet; 37. Second sidewall; 371. Second liquid inlet; 372. Second liquid outlet; 38. Heat exchange plate;

[0041] 4. Opening and closing assembly; 41. Opening and closing element; 411. First sealing part; 412. Second sealing part; 413. Transmission part; 414. First meshing tooth; 42. Temperature control element; 421. Housing; 4211. Accommodating space; 4212. Drive channel; 4213. Thermosensitive medium; 422. Drive element; 4221. Second meshing tooth; 43. Reset element;

[0042] 5. Ball cleaning device; 51. Ball outlet end; 52. Ball collection end;

[0043] 6. Flow rate detection device; 7. Conductivity detection device. Detailed Implementation

[0044] The following is in conjunction with the appendix Figures 1-9 This application will be described in further detail.

[0045] This application discloses a lithium battery wastewater waste heat recovery system 100.

[0046] Reference Figure 1 , Figure 4 , Figure 5 and Figure 6 The lithium battery wastewater waste heat recovery system 100 according to the embodiments of this application includes: wastewater pipeline 1, heating pipeline 2, heat exchanger 3, and opening and closing assembly 4.

[0047] Wastewater pipeline 1 is used to transport wastewater, and heating pipeline 2 is used to transport liquid to be heated.

[0048] In some specific embodiments, the wastewater can be condensate from the lithium carbonate MVR (Mechanical Vapor Recompression) process, and the liquid to be heated can be brine material from the lithium carbonate MVR process.

[0049] The heat exchanger 3 includes a first heat exchange chamber 31 and a second heat exchange chamber 32. Both the first heat exchange chamber 31 and the second heat exchange chamber 32 are provided with a first pipe 33 and a second pipe 34. The first pipe 33 is connected to the wastewater pipe 1, and the second pipe 34 is connected to the heating pipe 2. Specifically, the first pipe 33 of the first heat exchange chamber 31 and the first pipe 33 of the second heat exchange chamber 32 are both connected to the wastewater pipe 1, and the second pipe 34 of the first heat exchange chamber 31 and the second pipe 34 of the second heat exchange chamber 32 are both connected to the heating pipe 2.

[0050] Furthermore, heat exchange is suitable between the first pipe 33 and the second pipe 34. Specifically, a plurality of heat exchange plates 38 are provided between the first pipe 33 and the second pipe 34. The plurality of heat exchange plates 38 are spaced apart along the first direction of the heat exchanger 3. Heat exchange occurs between the first pipe 33 and the second pipe 34 through the plurality of heat exchange plates 38. That is, the wastewater in the first pipe 33 heats the liquid to be heated in the second pipe 34 through the plurality of heat exchange plates 38. The first direction of the heat exchanger 3 can be defined as... Figure 2 The left and right directions in the middle.

[0051] In some specific embodiments, the heat exchange plate 38 is preferably a heat exchange fin.

[0052] Furthermore, the opening and closing assembly 4 is located in the second heat exchange chamber 32. The opening and closing assembly 4 includes an opening and closing element 41, a temperature control element 42, and a reset element 43. The opening and closing element 41 is located in the first pipe 33 and the second pipe 34 within the second heat exchange chamber 32. The temperature control element 42 is connected to the first pipe 33 within the second heat exchange chamber 32. The temperature control element 42 is driven to both the opening and closing element 41 and the reset element 43. When the temperature of the wastewater in the first pipe 33 is not lower than the preset temperature, the temperature control element 42 drives the opening and closing element 41 to open the first pipe 33 and the second pipe 34. When the temperature of the wastewater in the first pipe 33 is lower than the preset temperature, the reset element 43 drives the temperature control element 42 to close the first pipe 33 and the second pipe 34.

[0053] Specifically, when the temperature of the wastewater in the first pipe 33 is greater than or equal to the preset temperature, the temperature control device 42 drives the opening and closing device 41 to open the first pipe 33 and the second pipe 34 in the second heat exchange chamber 32. The wastewater in the wastewater pipe 1 flows into the first pipe 33 in the first heat exchange chamber 31 and the first pipe 33 in the second heat exchange chamber 32 at the same time. The liquid to be heated in the heating pipe 2 flows into the second pipe 34 in the first heat exchange chamber 31 and the second pipe 34 in the second heat exchange chamber 32 at the same time. The wastewater in the first pipe 33 in the first heat exchange chamber 31 heats the liquid to be heated in the second pipe 34 in the first heat exchange chamber 31, and the wastewater in the first pipe 33 in the second heat exchange chamber 32 heats the liquid to be heated in the second pipe 34 in the second heat exchange chamber 32.

[0054] When the temperature of the wastewater in the first pipe 33 is lower than the preset temperature, the reset component 43 drives the temperature control component 42 to drive the opening and closing component 41 to close the first pipe 33 and the second pipe 34 in the second heat exchange chamber 32. The wastewater in the wastewater pipe 1 flows into the first pipe 33 in the first heat exchange chamber 31, and the liquid to be heated in the heating pipe 2 flows into the second pipe 34 in the first heat exchange chamber 31. The wastewater in the first pipe 33 in the first heat exchange chamber 31 heats the liquid to be heated in the second pipe 34 in the first heat exchange chamber 31.

[0055] It should be noted that the opening and closing element 41 is not located at the end of the first pipe 33. Wastewater in the wastewater pipe 1 can flow into the opening and closing element 41 and the end of the first pipe 33 in the second heat exchange chamber 32. The connection between the temperature control element 42 and the first pipe 33 in the second heat exchange chamber 32 is located between the opening and closing element 41 and the end of the first pipe 33 in the second heat exchange chamber 32.

[0056] Therefore, by installing an opening / closing element 41 in the first pipe 33 and the second pipe 34 within the second heat exchange chamber 32, the temperature control element 42 controls the opening / closing element 41 to open or close the first pipe 33 and the second pipe 34 within the second heat exchange chamber 32 according to the temperature of the wastewater in the first pipe 33. When the temperature of the wastewater in the first pipe 33 is not lower than a preset temperature, the temperature control element 42 drives the opening / closing element 41 to open the first pipe 33 and the second pipe 34 within the second heat exchange chamber 32. When the temperature of the wastewater in the first pipe 33 is lower than the preset temperature, the reset element 43 drives the temperature control element 42 to close the first pipe 33 and the second pipe 34 within the second heat exchange chamber 32. Compared with the prior art, when the temperature of the wastewater is not lower than the preset temperature, the wastewater heats the liquid to be heated through the first heat exchange chamber 31 and the second heat exchange chamber 32, thereby making full use of the wastewater's residual heat and improving the overall heat recovery rate.

[0057] Reference Figures 3-6In some embodiments of this application, a third pipe 35 is provided in the second heat exchange chamber 32. The third pipe 35 is connected to the first pipe 33 located in the second heat exchange chamber 32. Specifically, the connection between the third pipe 35 and the first pipe 33 is located between the opening and closing member 41 and the end of the first pipe 33. When the opening and closing member 41 opens or closes the corresponding first pipe 33 and second pipe 34, the wastewater in the wastewater pipe flows into the third pipe 35 through the first pipe 33.

[0058] Furthermore, the temperature control unit 42 includes a housing 421 and a drive member 422. The housing 421 is disposed in the third pipe 35 and is adapted to contact the wastewater in the first pipe 33. The housing 421 defines a receiving space 4211 and a drive channel 4212. The drive channel 4212 and the receiving space 4211 are connected. The receiving space 4211 is used to receive a thermosensitive medium 4213 adapted to thermal expansion and contraction. The housing 421 conducts the temperature of the wastewater to the thermosensitive medium 4213 in the receiving space 4211. The drive member 422 is movably disposed in the drive channel 4212 and its end extends out of the third pipe 35. That is, when the drive member 422 is driven, it moves along the drive channel 4212. The reset member 43 is elastically deformable and disposed between the drive member 422 and the inner peripheral wall of the second heat exchange chamber 32. The drive member 422 is connected to the opening and closing member 41 and the reset member 43 in a transmission manner.

[0059] When the thermosensitive medium 4213 expands, it drives the driving component 422 to move away from the housing 421, so that the driving component 422 drives the opening and closing component 41 to open the first pipeline 33 and the second pipeline 34. When the thermosensitive medium 4213 contracts, the reset component 43 drives the driving component 422 to move closer to the housing 421, so that the driving component 422 drives the opening and closing component 41 to close the first pipeline 33 and the second pipeline 34.

[0060] Specifically, when the temperature of the wastewater in the first pipe 33 is not lower than the preset temperature, the thermosensitive medium 4213 expands and flows into the drive channel 4212. Then, the thermosensitive medium 4213 drives the drive member 422 to move away from the housing 421 along the drive channel 4212. The drive member 422 drives the opening and closing member 41 to open the first pipe 33 and the second pipe 34. The drive member 422 also compresses the reset member 43. The elastic force applied by the reset member 43 to the drive member 422 is less than the thrust applied by the thermosensitive medium 4213 to the drive member 422.

[0061] When the temperature of the wastewater in the first pipe 33 is lower than the preset temperature, the thermosensitive medium 4213 contracts, and the elastic force applied by the reset member 43 to the drive member 422 is greater than the thrust applied by the thermosensitive medium 4213 to the drive member 422. The reset member 43 drives the drive member 422 to move along the drive channel 4212 closer to the housing 421. The drive member 422 drives the opening and closing member 41 to close the first pipe 33 and the second pipe 34. The drive member 422 also drives the thermosensitive medium 4213 located in the drive channel 4212 to flow into the receiving space 4211. Thus, the technical effect of opening or closing the corresponding first pipe 33 and second pipe 34 can be achieved by the temperature control member 42 and the reset member 43 driving the opening and closing member 41.

[0062] In some specific embodiments, the heat-sensitive medium 4213 can be paraffin wax, etc.

[0063] In some specific embodiments, the reset member 43 is preferably a spring.

[0064] Reference Figure 4 , Figure 6 and Figure 7 In some embodiments of this application, the inner peripheral wall of the second heat exchange chamber 32 is provided with a guide member 321. The guide member 321 is provided with a guide groove 3211 and a guide hole 3212. The guide hole 3212 is located in the guide groove 3211, and the guide hole 3212 forms a guide notch 3213 on the inner peripheral wall of the guide groove 3211. Specifically, along the height direction of the heat exchanger 3, the guide hole 3212 forms guide notches 3213 on both the upper and lower end walls of the guide groove 3211. That is to say, the diameter of the guide hole 3212 is larger than the height of the guide groove 3211. The height direction of the heat exchanger 3 can be indicated by... Figure 7 The up and down directions in the middle.

[0065] Furthermore, the driving member 422 extends into the guide groove 3211 and is guided and engaged with the guide groove 3211. The reset member 43 is disposed in the guide hole 3212. The reset member 43 is elastically deformable and disposed between the driving member 422 and the bottom wall of the guide hole 3212. The guide hole 3212 and the reset member 43 are guided and engaged. The reset member 43 extends into the guide notch 3213. The outer peripheral wall of the reset member 43 is adapted to stop and limit the inner peripheral wall of the guide notch 3213.

[0066] By guiding and engaging the drive member 422 and the guide groove 3211, the drive member 422 can be prevented from deviating from the preset movement trajectory. This prevents the drive member 422 from failing to drive the opening and closing member 41 to open or close the corresponding first pipe 33 and second pipe 34. Furthermore, by guiding and engaging the reset member 43 and the guide hole 3212, the reset member 43 can be prevented from deviating from the preset movement trajectory when the drive member 422 compresses the reset member 43 and when the reset member 43 extends and recovers. This prevents the reset member 43 from failing to drive the drive member 422 to move closer to the housing 421, thereby improving the movement stability of the drive member 422.

[0067] Reference Figure 3 , Figure 4 and Figure 6 In some embodiments of this application, the opening and closing member 41 includes a first sealing part 411, a second sealing part 412, and a transmission part 413. The first sealing part 411 is pivotally disposed on the first pipeline 33, the second sealing part 412 is pivotally disposed on the second pipeline 34, and the transmission part 413 is connected between the first sealing part 411 and the second sealing part 412. The outer peripheral wall of the transmission part 413 is provided with a first meshing tooth 414, and the first meshing tooth 414 is located between the first pipeline 33 and the second pipeline 34. The driving member 422 is provided with a second meshing tooth 4221, and the first meshing tooth 414 and the second meshing tooth 4221 are meshed together. The sealing part is used to open or close the corresponding pipeline. That is, the first sealing part 411 is used to open or close the first pipeline 33 in the second heat exchange chamber 32, and the second sealing part 412 is used to open or close the second pipeline 34 in the second heat exchange chamber 32.

[0068] When the thermosensitive medium 4213 expands and drives the driving member 422 to move away from the housing 421, the driving member 422 drives the transmission part 413 to rotate around the central axis of the transmission part 413 through the first meshing tooth 414 and the second meshing tooth 4221. The transmission part 413 drives the first sealing part 411 and the second sealing part 412 to rotate, so that the first sealing part 411 opens the first pipeline 33 and the second sealing part 412 opens the second pipeline 34. Thus, the technical effect of the driving member 422 driving the opening and closing member 41 to open the first pipeline 33 and the second pipeline 34 can be achieved.

[0069] When the thermosensitive medium 4213 contracts, and the reset member 43 drives the drive member 422 to move closer to the housing 421, the drive member 422 drives the transmission part 413 to rotate around the central axis of the transmission part 413 through the first meshing tooth 414 and the second meshing tooth 4221. The transmission part 413 drives the first sealing part 411 and the second sealing part 412 to rotate, so that the first sealing part 411 closes the first pipeline 33 and the second sealing part 412 closes the second pipeline 34. Thus, the technical effect of the drive member 422 driving the opening and closing member 41 to close the first pipeline 33 and the second pipeline 34 can be achieved.

[0070] Furthermore, there are multiple first meshing teeth 414, which are arranged sequentially along the circumferential direction of the transmission part 413, and multiple second meshing teeth 4221, which are arranged sequentially along the first direction of the heat exchanger 3.

[0071] Reference Figure 5 In some embodiments of this application, there are multiple second heat exchange chambers 32 and multiple opening and closing components 4. These multiple second heat exchange chambers 32 and multiple opening and closing components 4 are arranged sequentially along the second direction of the heat exchanger 3, and each of the multiple second heat exchange chambers 32 and multiple opening and closing components 4 is arranged in a one-to-one correspondence. The second direction of the heat exchanger 3 can... Figure 5 The front and back directions in the middle.

[0072] By setting multiple second heat exchange chambers 32 and multiple opening and closing components 4, when the temperature of the wastewater in the wastewater pipeline 1 is not lower than the preset temperature, the opening and closing components 4 open the first pipeline 33 and the second pipeline 34 in the corresponding second heat exchange chamber 32. The wastewater in the wastewater pipeline 1 flows into the first pipeline 33 in the first heat exchange chamber 31 and the first pipeline 33 in the multiple second heat exchange chambers 32 at the same time. The liquid to be heated in the heating pipeline 2 flows into the second pipeline 34 in the first heat exchange chamber 31 and the second pipeline 34 in the multiple second heat exchange chambers 32 at the same time. The wastewater in the wastewater pipeline 1 can heat the liquid to be heated through the multiple second heat exchange chambers 32, thereby further making full use of the wastewater's residual heat and improving the overall heat recovery rate.

[0073] In some specific embodiments, the first heat exchange chamber 31 may be located between any two adjacent second heat exchange chambers 32.

[0074] In some other specific embodiments, the first heat exchange chamber 31 may be located at the front or rear end of a plurality of second heat exchange chambers 32.

[0075] Reference Figure 2 , Figure 8 and Figure 9 In some embodiments of this application, along a first direction of the heat exchanger 3, the heat exchanger 3 has a first sidewall 36 and a second sidewall 37 opposite to each other. In some specific embodiments, the first sidewall 36 can be the right sidewall of the heat exchanger 3, and the second sidewall 37 can be the left sidewall of the heat exchanger 3.

[0076] The first sidewall 36 is provided with a first liquid inlet 361 and a first liquid outlet 362, and the second sidewall 37 is provided with a second liquid inlet 371 and a second liquid outlet 372. Each first pipe 33 is connected to the first liquid inlet 361 and the second liquid outlet 372, and each second pipe 34 is connected to the second liquid inlet 371 and the first liquid outlet 362. Specifically, the first pipe 33 in the first heat exchange chamber 31 and the first pipe 33 in the second heat exchange chamber 32 are both connected to the first liquid inlet 361, the first pipe 33 in the first heat exchange chamber 31 and the first pipe 33 in the second heat exchange chamber 32 are both connected to the second liquid outlet 372, the second pipe 34 in the first heat exchange chamber 31 and the second pipe 34 in the second heat exchange chamber 32 are both connected to the second liquid inlet 371, and the first pipe 33 in the first heat exchange chamber 31 and the first pipe 33 in the second heat exchange chamber 32 are both connected to the first liquid outlet 362.

[0077] Wastewater pipe 1 is connected to both the first inlet 361 and the second outlet 372. Heating pipe 2 is connected to both the second inlet 371 and the first outlet 362. Wastewater enters the first pipe 33 from the first inlet 361, and the liquid to be heated enters the second pipe 34 from the second inlet 371.

[0078] By setting the flow direction of wastewater and the flow direction of the liquid to be heated to be opposite, compared to setting the flow direction of wastewater and the flow direction of the liquid to be heated to be in the same direction, when both wastewater and the liquid to be heated are flowing, the wastewater can continuously be opposite to the unheated liquid to be heated, and the wastewater can continuously heat the unheated liquid to be heated, thereby improving the waste heat utilization rate of wastewater.

[0079] Reference Figure 1 In some embodiments of this application, the lithium battery wastewater waste heat recovery system 100 further includes: a ball cleaning device 5, which is located in the heating pipeline 2. The ball outlet 51 and the ball receiving end 52 of the ball cleaning device 5 are both connected to the heating pipeline 2. Along the conveying direction of the liquid to be heated, the ball cleaning device 5 is located downstream of the heat exchanger 3. The connection between the ball outlet 51 and the heating pipeline 2 is located upstream of the heat exchanger 3, and the connection between the ball receiving end 52 and the heating pipeline 2 is located downstream of the heat exchanger 3. The ball cleaning device 5 is used to output balls to the second pipeline 34 to clean the impurities in the second pipeline 34, and to separate the balls and the liquid to be heated.

[0080] Specifically, the ball-out end 51 of the ball-cleaning device 5 outputs balls, which enter multiple second pipes 34 in the heat exchanger 3 through the second liquid inlet 371. The balls collide with and clean the debris adhering to the inner wall of the second pipe 34. The debris and balls adhering to the inner wall of the second pipe 34 flow into the ball-receiving end 52 of the ball-cleaning device 5 through the first liquid outlet 362. The ball-cleaning device 5 separates the balls and the liquid to be heated. The balls are recovered by the ball-cleaning device 5, and the liquid to be heated flows out of the ball-cleaning device 5 and into the heating pipe 2. This arrangement can reduce the debris adhering to the second pipe 34, and can prevent the debris adhering to the second pipe 34 from reducing the heat exchange efficiency of the liquid to be heated and the wastewater, thereby improving the overall heat recovery rate of the lithium battery wastewater waste heat recovery system 100.

[0081] Furthermore, the heating pipeline 2 is equipped with a filter device. Along the conveying direction of the liquid to be heated, the filter device is located downstream of the ball cleaning device 5. When the liquid to be heated flows out of the ball cleaning device 5 and into the heating pipeline 2, the liquid to be heated flows into the filter device, and the filter device filters out the impurities in the liquid to be heated that are attached to the second pipeline 34.

[0082] It should be noted that the concentration of calcium and magnesium ions in the brine is relatively high, and scale is easily formed in the second pipeline 34. The scale affects the heat exchange efficiency between the brine and the wastewater.

[0083] In some specific embodiments, the ball cleaning device 5 can be a condenser ball cleaning device 5.

[0084] Reference Figure 1 In some embodiments of this application, the lithium battery wastewater waste heat recovery system 100 further includes: a flow detection element 6 and a controller. The flow detection element 6 is disposed in the heating pipe 2 and is used to detect the flow rate of the liquid to be heated in the heating pipe 2. The ball cleaning device 5 and the flow detection element 6 are both connected to the controller. The controller is used to control the ball cleaning device 5 to output or stop outputting balls according to the detection signal of the flow detection element 6.

[0085] Specifically, when the flow rate of the liquid to be heated in the heating pipe 2 is less than the preset flow rate, the controller controls the rubber ball cleaning device 5 to output rubber balls according to the detection signal of the flow detection device 6, so that the rubber balls clean the debris in multiple second pipes 34, thereby avoiding the debris in the second pipes 34 from clogging the second pipes 34, and thus improving the flow stability of the liquid to be heated in the heating pipe 2.

[0086] When the flow rate of the liquid to be heated in the heating pipe 2 is greater than or equal to the preset flow rate, the controller controls the rubber ball cleaning device 5 to stop outputting rubber balls according to the detection signal of the flow detection device 6, thereby avoiding the rubber balls occupying the space in the second pipe 34 and causing the flow rate of the liquid to be heated in the second pipe 34 to decrease.

[0087] In some specific embodiments, the flow detection element 6 can be a turbine flow meter, but this application is not limited to this, and the flow detection element 6 can also be a volumetric flow meter, etc.

[0088] Reference Figure 1 In some embodiments of this application, the lithium battery wastewater waste heat recovery system 100 further includes: a conductivity detector 7, which is disposed in the wastewater pipeline 1. Along the wastewater conveying direction of the wastewater pipeline 1, the conductivity detector 7 is located downstream of the heat exchanger 3, that is, the conductivity detector 7 is located downstream of the second outlet 372. The conductivity detector 7 is used to detect the conductivity of the wastewater. The conductivity detector 7 is communicatively connected to the controller, which is used to issue an alarm signal based on the detection signal of the conductivity detector 7.

[0089] Specifically, the concentration of calcium and magnesium ions in the brine is high. When both the first pipe 33 and the second pipe 34 in the heat exchanger 3 rupture, the liquid to be heated mixes into the wastewater, increasing the concentration of calcium and magnesium ions in the wastewater and increasing its conductivity. When the conductivity of the wastewater is greater than or equal to the preset conductivity value, the controller issues an alarm signal based on the conductivity detection element 7. The alarm signal is used to remind the operator that the first pipe 33 and the second pipe 34 in the heat exchanger 3 have ruptured. The operator closes the wastewater pipe 1 and the heating pipe 2 based on the alarm signal, so that the wastewater pipe 1 stops transporting wastewater and the heating pipe 2 stops transporting the liquid to be heated.

[0090] In some specific embodiments, the conductivity detection element 7 can be a conductivity sensor, but this application is not limited to this, and the conductivity detection element 7 can also be a capacitive conductivity probe.

[0091] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A lithium battery wastewater waste heat recovery system, characterized by, include: Wastewater pipeline (1) and heating pipeline (2), wherein the wastewater pipeline (1) is used to transport wastewater and the heating pipeline (2) is used to transport liquid to be heated; The heat exchanger (3) includes a first heat exchange chamber (31) and a second heat exchange chamber (32). The first heat exchange chamber (31) and the second heat exchange chamber (32) are each provided with a first pipe (33) and a second pipe (34). The first pipe (33) is connected to the wastewater pipe (1), and the second pipe (34) is connected to the heating pipe (2). The first pipe (33) and the second pipe (34) are suitable for heat exchange. An opening and closing assembly (4) is provided in the second heat exchange chamber (32). The opening and closing assembly (4) includes an opening and closing element (41), a temperature control element (42), and a reset element (43). The opening and closing element (41) is provided in the first pipeline (33) and the second pipeline (34). The temperature control element (42) is connected to the first pipeline (33). The temperature control element (42) is drivenly connected to the opening and closing element (41) and the reset element (43). When the temperature of the wastewater in the first pipeline (33) is not lower than the preset temperature, the temperature control device (42) drives the opening and closing device (41) to open the first pipeline (33) and the second pipeline (34). When the temperature of the wastewater in the first pipeline (33) is lower than the preset temperature, the reset device (43) drives the temperature control device (42) to drive the opening and closing device (41) to close the first pipeline (33) and the second pipeline (34). A third pipe (35) is provided in the second heat exchange chamber (32), and the third pipe (35) is connected to the first pipe (33) located in the second heat exchange chamber (32). The temperature control unit (42) includes a housing (421) and a drive element (422). The housing (421) is located in the third pipe (35) and is adapted to contact the wastewater in the first pipe (33). The housing (421) defines a receiving space (4211) and a drive channel (4212). The drive channel (4212) The drive member (422) is connected to the accommodating space (4211), which is used to accommodate a thermosensitive medium (4213) suitable for thermal expansion and contraction. The drive member (422) is movably disposed in the drive channel (4212) and its end extends out of the third pipe (35). The reset member (43) is elastically deformably disposed between the drive member (422) and the inner peripheral wall of the second heat exchange chamber (32). The drive member (422) is connected to the opening and closing member (41) and the reset member (43) in a transmission connection. When the thermosensitive medium (4213) expands, the thermosensitive medium (4213) drives the driving member (422) to move away from the housing (421), so that the driving member (422) drives the opening and closing member (41) to open the first pipeline (33) and the second pipeline (34). When the thermosensitive medium (4213) contracts, the reset member (43) drives the driving member (422) to move closer to the housing (421), so that the driving member (422) drives the opening and closing member (41) to close the first pipeline (33) and the second pipeline (34).

2. The lithium battery wastewater waste heat recovery system of claim 1, wherein, The inner peripheral wall of the second heat exchange chamber (32) is provided with a guide member (321). The guide member (321) is provided with a guide groove (3211) and a guide hole (3212). The guide hole (3212) is located in the guide groove (3211). The guide hole (3212) forms a guide notch (3213) on the inner peripheral wall of the guide groove (3211). The driving member (422) extends into the guide groove (3211) and is guided and engaged with the guide groove (3211). The reset member (43) is provided in the guide hole (3212). The reset member (43) is elastically deformable and disposed between the driving member (422) and the bottom wall of the guide hole (3212). The guide hole (3212) and the reset member (43) are guided and engaged.

3. The lithium battery wastewater waste heat recovery system according to claim 1, characterized in that, The opening and closing component (41) includes a first sealing part (411), a second sealing part (412), and a transmission part (413). The first sealing part (411) is pivotally disposed on the first pipeline (33), and the second sealing part (412) is pivotally disposed on the second pipeline (34). The transmission part (413) is connected between the first sealing part (411) and the second sealing part (412). The outer peripheral wall of the transmission part (413) is provided with a first meshing tooth (414), and the driving component (422) is provided with a second meshing tooth (4221). The first meshing tooth (414) and the second meshing tooth (4221) are meshed together. The sealing part is used to open or close the corresponding pipeline.

4. The lithium battery wastewater waste heat recovery system according to claim 1, characterized in that, There are multiple second heat exchange chambers (32) and multiple opening and closing components (4). The multiple second heat exchange chambers (32) and multiple opening and closing components (4) are arranged sequentially along the second direction of the heat exchanger (3), and the multiple second heat exchange chambers (32) and multiple opening and closing components (4) are arranged in a one-to-one correspondence.

5. The lithium battery wastewater waste heat recovery system according to claim 1, characterized in that, Along a first direction of the heat exchanger (3), the heat exchanger (3) has opposing first sidewalls (36) and second sidewalls (37). The first sidewall (36) is provided with a first liquid inlet (361) and a first liquid outlet (362), and the second sidewall (37) is provided with a second liquid inlet (371) and a second liquid outlet (372). Each of the first pipes (33) is connected to the first liquid inlet (361) and the second liquid outlet (372), and each of the second pipes (34) is connected to the second liquid outlet (372). Both are connected to the second inlet (371) and the first outlet (362). The wastewater pipeline (1) is connected to both the first inlet (361) and the second outlet (372). The heating pipeline (2) is connected to both the second inlet (371) and the first outlet (362). Wastewater enters the first pipeline (33) from the first inlet (361), and the liquid to be heated enters the second pipeline (34) from the second inlet (371).

6. The lithium battery wastewater waste heat recovery system according to claim 1, characterized in that, Also includes: A ball cleaning device (5) is provided in the heating pipeline (2). The ball outlet (51) and ball collection (52) of the ball cleaning device (5) are both connected to the heating pipeline (2). Along the conveying direction of the liquid to be heated, the ball cleaning device (5) is located on the downstream side of the heat exchanger (3). The connection between the ball outlet (51) and the heating pipeline (2) is located on the upstream side of the heat exchanger (3), and the connection between the ball collection (52) and the heating pipeline (2) is located on the downstream side of the heat exchanger (3). The ball cleaning device (5) is used to output balls to the second pipeline (34) to clean the impurities in the second pipeline (34), and to separate the balls from the liquid to be heated.

7. A lithium battery wastewater waste heat recovery system according to claim 6, characterized in that, It also includes: a flow detection device (6) and a controller. The flow detection device (6) is located in the heating pipeline (2). The flow detection device (6) is used to detect the flow rate of the liquid to be heated in the heating pipeline (2). The ball cleaning device (5) and the flow detection device (6) are both connected to the controller. The controller is used to control the ball cleaning device (5) to output or stop outputting balls according to the detection signal of the flow detection device (6).

8. A lithium battery wastewater waste heat recovery system according to claim 1, characterized in that, Also includes: The conductivity detector (7) and controller are provided. The conductivity detector (7) is located in the wastewater pipeline (1) along the wastewater conveying direction of the wastewater pipeline (1). The conductivity detector (7) is located on the downstream side of the heat exchanger (3). The conductivity detector (7) is used to detect the conductivity of the wastewater. The conductivity detector (7) is communicatively connected to the controller. The controller is used to issue an alarm signal based on the detection signal of the conductivity detector (7).

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