Lithium battery waste water waste heat recovery system

Abstract

The invention discloses a lithium battery waste water waste heat recovery system which comprises a waste water 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 each provided with a first pipeline communicating with the waste water pipeline and a second pipeline communicating with the heating pipeline, and heat exchange is suitable for being carried out between the first pipelines and the second pipelines. The opening and closing assembly is arranged in the second heat exchange chamber and comprises an opening and closing part, a temperature control part and a reset part, the opening and closing part is arranged on the first pipeline and the second pipeline, the temperature control part communicates with the first pipeline, and the temperature control part is in transmission connection with the opening and closing part and the reset part; when the temperature of the waste water is not lower than the preset temperature, the temperature control part drives the opening-closing part to open the first pipeline and the second pipeline, and when the temperature of the waste water is lower than the preset temperature, the reset part drives the temperature control part to drive the opening-closing part to close the first pipeline and the second pipeline. And waste water heats liquid to be heated through the first heat exchange chamber and the second heat exchange chamber.

Description

Technical Field

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

[0002] In the related art, the brine liquid material needs to be heated before entering the lithium carbonate MVR process system as a raw material. The traditional heating method generally uses steam to directly heat the brine liquid material. Although the heating effect is significant, the energy consumption is high. In the lithium carbonate MVR process, part of the condensate will be cooled by the cooling tower. In order to reduce the energy consumption of heating the brine liquid material, the brine liquid material is heated by the condensate. However, the temperature of the condensate fluctuates. When the condensate temperature is too high, although the condensate can effectively heat the brine process material, there is still some waste heat in the condensate that cannot be fully utilized, resulting in heat energy loss and reducing the overall heat recovery efficiency. Summary of the invention

[0003] In order to make full use of the waste heat of condensed water as much as possible and improve the overall heat recovery rate, the present application provides a lithium battery wastewater waste heat recovery system.

[0004] The present application provides a lithium battery wastewater waste heat recovery system that adopts the following technical solutions: A lithium battery waste water waste heat recovery system, comprising: a waste water pipeline and a heating pipeline, the waste water pipeline is used to transport waste water, and the heating pipeline is used to transport liquid to be heated; a heat exchanger, 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 and a second pipeline, the first pipeline is communicated with the waste water pipeline, the second pipeline is communicated with the heating pipeline, and the first pipeline and the second pipeline are suitable for heat exchange; an opening and closing component, the opening and closing component is arranged in the second heat exchange chamber, the opening and closing component comprises an opening and closing part, a temperature control part and a reset part, the opening and closing part is arranged in the first pipeline and the second pipeline, the temperature control part is communicated with the first pipeline, and the temperature control part is transmission-connected with the opening and closing part and the reset part; when the temperature of the waste water in the first pipeline is not less than a preset temperature, the temperature control part drives the opening and closing part to open the first pipeline and the second pipeline, and when the temperature of the waste water in the first pipeline is less than the preset temperature, the reset part drives the temperature control part to drive the opening and closing part to close the first pipeline and the second pipeline.

[0005] By adopting the above technical solution, by providing opening and closing members in the first pipeline and the second pipeline in the second heat exchange chamber, the temperature control member controls the opening and closing members to open or close the first pipeline and the second pipeline in the second heat exchange chamber according to the temperature of the wastewater in the first pipeline. When the temperature of the wastewater in the first pipeline is not less than the preset temperature, the temperature control member drives the opening and closing members to open the first pipeline and the second pipeline in the second heat exchange chamber. When the temperature of the wastewater in the first pipeline is less than the preset temperature, the reset member drives the temperature control member to drive the opening and closing members to close the first pipeline and the second pipeline in the second heat exchange chamber. Compared with the prior art, when the temperature of the wastewater is not less than the preset temperature, the wastewater heats the liquid to be heated through the first heat exchange chamber and the second heat exchange chamber, so that the waste heat of the wastewater can be utilized as fully as possible, and thus the overall heat energy recovery rate can be improved.

[0006] Preferably, a third pipeline is provided in the second heat exchange chamber, and the third pipeline is communicated with the first pipeline located in the second heat exchange chamber. The temperature control member includes a housing and a driving member. The housing is provided in the third pipeline and is adapted to contact the wastewater in the first pipeline. The housing defines a receiving space and a driving channel, and the driving channel is communicated with the receiving space. The receiving space is used to receive a thermosensitive medium suitable for thermal expansion and contraction. The driving member is movably arranged in the driving channel and the end thereof extends out of the third pipeline. The reset member is elastically deformably arranged between the driving member and the inner peripheral wall of the second heat exchange chamber. The driving member is in transmission connection with both the opening and closing members and the reset member; When the thermosensitive medium expands, the thermosensitive medium drives the driving member to move away from the housing, so that the driving member drives the opening and closing members to open the first pipeline and the second pipeline. When the thermosensitive medium contracts, the reset member drives the driving member to move close to the housing, so that the driving member drives the opening and closing members to close the first pipeline and the second pipeline.

[0007] By adopting the above technical solution, when the temperature of the wastewater in the first pipeline is not less than the preset temperature, the thermosensitive medium expands, and then the thermosensitive medium drives the driving member to move away from the housing along the driving channel, and the driving member drives the opening and closing members to open the first pipeline and the second pipeline. When the temperature of the wastewater in the first pipeline is less than the preset temperature, the thermosensitive medium contracts, and the reset member drives the driving member to move close to the housing along the driving channel, and the driving member drives the opening and closing members to close the first pipeline and the second pipeline, so that the technical effect of driving the opening and closing members to open or close the corresponding first pipeline and second pipeline through the temperature control member and the reset member can be achieved.

[0008] Preferably, a guiding member is provided on the inner peripheral wall of the second heat exchange chamber. The guiding member is provided with a guiding groove and a guiding hole. The guiding hole is located in the guiding groove, and a guiding notch is formed on the inner peripheral wall of the guiding groove by the guiding hole. The driving member extends into the guiding groove and is in guiding cooperation with the guiding groove. The resetting member is arranged in the guiding hole and is elastically deformably arranged between the driving member and the bottom wall of the guiding hole. The guiding hole and the resetting member are in guiding cooperation.

[0009] By adopting the above technical solution, through the guiding cooperation between the driving member and the guiding groove, the driving member can be prevented from deviating from the preset movement track, and it can be avoided that the driving member cannot drive the opening and closing member to open or close the corresponding first pipeline and second pipeline. And through the guiding cooperation between the resetting member and the guiding hole, when the driving member compresses the resetting member and the resetting member elongates and restores, the resetting member can be prevented from deviating from the preset movement track, so that it can be prevented that the resetting member cannot drive the driving member to move close to the housing, and thus the movement stability of the driving member can be improved.

[0010] Preferably, the opening and closing member includes a first blocking portion, a second blocking portion and a transmission portion. The first blocking portion is pivotally arranged on the first pipeline, the second blocking portion is pivotally arranged on the second pipeline, the transmission portion is connected between the first blocking portion and the second blocking portion, a first meshing tooth is provided on the outer peripheral wall of the transmission portion, a second meshing tooth is provided on the driving member, and the first meshing tooth and the second meshing tooth are meshingly connected. The blocking portion is used to open or close the corresponding pipeline.

[0011] By adopting the above technical solution, when the thermosensitive medium expands and the thermosensitive medium drives the driving member to move away from the housing, the driving member drives the transmission portion to rotate around the central axis of the transmission portion through the first meshing tooth and the second meshing tooth. The transmission portion drives the first blocking portion and the second blocking portion to rotate, so that the first blocking portion opens the first pipeline and the second blocking portion opens the second pipeline, and thus the technical effect that the driving member drives the opening and closing member to open the first pipeline and the second pipeline can be achieved.

[0012] Preferably, there are a plurality of the second heat exchange chambers and the opening and closing assemblies. The plurality of second heat exchange chambers and the plurality of opening and closing assemblies are sequentially arranged along the second direction of the heat exchanger, and the plurality of second heat exchange chambers and the plurality of opening and closing assemblies are arranged in one-to-one correspondence.

[0013] By adopting the above technical solution, when the temperature of the wastewater in the wastewater pipeline is not less than the preset temperature, the opening and closing assembly opens the first pipeline and the second pipeline in the corresponding second heat exchange chamber. The wastewater in the wastewater pipeline simultaneously flows into the first pipeline in the first heat exchange chamber and the first pipelines in multiple second heat exchange chambers. The liquid to be heated in the heating pipeline simultaneously flows into the second pipeline in the first heat exchange chamber and the second pipelines in multiple second heat exchange chambers. The wastewater in the wastewater pipeline can heat the liquid to be heated through multiple second heat exchange chambers, so as to further make full use of the waste heat of the wastewater, and then improve the overall heat energy recovery rate.

[0014] Preferably, along the first direction of the heat exchanger, the heat exchanger has opposite first side wall and second side wall. The first side wall is provided with a first liquid inlet and a first liquid outlet, and the second side wall is provided with a second liquid inlet and a second liquid outlet. Each first pipeline is communicated with the first liquid inlet and the second liquid outlet, and each second pipeline is communicated with the second liquid inlet and the first liquid outlet. The wastewater pipeline is communicated with both the first liquid inlet and the second liquid outlet, and the heating pipeline is communicated with both the second liquid inlet and the first liquid outlet. Wastewater enters the first pipeline from the first liquid inlet, and the liquid to be heated enters the second pipeline from the second liquid inlet.

[0015] By adopting the above technical solution, by setting the flow direction of the wastewater and the flow direction of the liquid to be heated to flow in opposite directions, compared with setting the flow direction of the wastewater and the flow direction of the liquid to be heated to flow in the same direction, when both the wastewater and the liquid to be heated are flowing, the wastewater can continuously face the unheated liquid to be heated, and the wastewater can continuously heat the unheated liquid to be heated, so as to improve the utilization rate of the waste heat of the wastewater.

[0016] Preferably, the lithium battery wastewater waste heat recovery system further includes: a rubber ball cleaning device. The rubber ball cleaning device is arranged in the heating pipeline. The ball outlet end and the ball receiving end of the rubber ball cleaning device are both communicated with the heating pipeline. Along the conveying direction of the liquid to be heated, the rubber ball cleaning device is located on the downstream side of the heat exchanger. The connection part of the ball outlet end and the heating pipeline is located on the upstream side of the heat exchanger, and the connection part of the ball receiving end and the heating pipeline is located on the downstream side of the heat exchanger. The rubber ball cleaning device is used to output rubber balls to the second pipeline to clean the sundries in the second pipeline, and to separate the rubber balls and the liquid to be heated.

[0017] By adopting the above technical solution, the rubber balls collide with the inner peripheral wall of the second pipeline and clean the sundries attached to the inner peripheral wall of the second pipeline. The sundries attached to the inner peripheral wall of the second pipeline and the rubber balls flow into the ball collecting end of the rubber ball cleaning device through the first liquid outlet. The rubber ball cleaning device separates the rubber balls from the liquid to be heated. The rubber balls are 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. Such a setting can reduce the sundries attached to the second pipeline, avoid the sundries attached to the second pipeline from reducing the heat exchange efficiency of the liquid to be heated and the waste water, and further improve the overall heat energy recovery rate of the lithium battery waste water waste heat recovery system.

[0018] Preferably, the lithium battery waste water waste heat recovery system further includes: a flow detection component and a controller. The flow detection component is arranged in the heating pipeline. The flow detection component is used to detect the flow rate of the liquid to be heated in the heating pipeline. Both the rubber ball cleaning device and the flow detection component are connected to the controller. The controller is used to control the output or stop of the output of the rubber balls by the rubber ball cleaning device according to the detection signal of the flow detection component.

[0019] 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 component, so that the rubber balls clean the sundries in multiple second pipelines, thereby avoiding the sundries in the second pipeline from blocking the second pipeline, and further improving the flow rate stability of the liquid to be heated in the heating pipeline.

[0020] Preferably, the lithium battery waste water waste heat recovery system further includes: a conductivity detection component and a controller. The conductivity detection component is arranged in the waste water pipeline. Along the waste water conveying direction of the waste water pipeline, the conductivity detection component is located on the downstream side of the heat exchanger. The conductivity detection component is used to detect the conductivity of the waste water. The conductivity detection component is communicatively connected to the controller. The controller is used to send an alarm signal according to the detection signal of the conductivity detection component.

[0021] By adopting the above technical solution, when the conductivity of the waste water is greater than or equal to the preset conductivity value, the controller sends an alarm signal according to the conductivity detection component. The alarm signal is used to prompt the operator that the first pipeline and the second pipeline in the heat exchanger are broken. The operator closes the waste water pipeline and the heating pipeline according to the alarm signal, so that the waste water pipeline stops conveying waste water and the heating pipeline stops conveying the liquid to be heated.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. By providing opening and closing members in the first pipeline and the second pipeline within the second heat exchange chamber, a temperature control component controls the opening and closing members to open or close the first pipeline and the second pipeline within the second heat exchange chamber according to the temperature of the wastewater in the first pipeline. When the temperature of the wastewater in the first pipeline is not less than the preset temperature, the temperature control component drives the opening and closing members to open the first pipeline and the second pipeline within the second heat exchange chamber. When the temperature of the wastewater in the first pipeline is less than the preset temperature, a reset component drives the temperature control component to drive the opening and closing members to close the first pipeline and the second pipeline within the second heat exchange chamber. Compared with the prior art, when the temperature of the wastewater is not less than the preset temperature, the wastewater heats the liquid to be heated through the first heat exchange chamber and the second heat exchange chamber, so that the waste heat of the wastewater can be utilized as fully as possible, and thus the overall heat energy recovery rate can be improved; 2. By setting the flow direction of the wastewater and the flow direction of the liquid to be heated to be in opposite directions, compared with setting the flow direction of the wastewater and the flow direction of the liquid to be heated to be in the same direction, when both the wastewater and the liquid to be heated are flowing, the wastewater can continuously face the unheated liquid to be heated, and the wastewater can continuously heat the unheated liquid to be heated, thereby improving the utilization rate of the waste heat of the wastewater; 3. When the conductivity of the wastewater is greater than or equal to the preset conductivity value, the controller issues an alarm signal according to the conductivity detection component. The alarm signal is used to prompt the operator that the first pipeline and the second pipeline in the heat exchanger are ruptured. The operator closes the wastewater pipeline and the heating pipeline according to the alarm signal, so that the wastewater pipeline stops transporting wastewater and the heating pipeline stops transporting the liquid to be heated. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of a lithium battery wastewater waste heat recovery system according to an embodiment of the present application; Figure 2 is a schematic diagram of a heat exchanger according to an embodiment of the present application; Figure 3 is a cross-sectional view of a heat exchanger according to an embodiment of the present application; Figure 4 is Figure 3 an enlarged schematic view of part A in; Figure 5 is a cross-sectional view of the heat exchanger from another angle according to an embodiment of the present application; Figure 6 is Figure 5 an enlarged schematic view of part B in; Figure 7 is a schematic diagram of a guiding member according to an embodiment of the present application; Figure 8 is a cross-sectional view of the heat exchanger from another angle according to an embodiment of the present application; Figure 9 is a cross-sectional view of the heat exchanger from another angle according to an embodiment of the present application.

[0024] Description of the reference numerals: 100, Waste heat recovery system for lithium battery wastewater; 1, Wastewater pipeline; 2, Heating pipeline; 3, Heat exchanger; 31, First heat exchange chamber; 32, Second heat exchange chamber; 321, Guide member; 3211, Guide groove; 3212, Guide hole; 3213, Guide notch; 33, First pipeline; 34, Second pipeline; 35, Third pipeline; 36, First side wall; 361, First liquid inlet; 362, First liquid outlet; 37, Second side wall; 371, Second liquid inlet; 372, Second liquid outlet; 38, Heat exchange fin; 4, Opening and closing assembly; 41, Opening and closing member; 411, First sealing portion; 412, Second sealing portion; 413, Transmission portion; 414, First meshing tooth; 42, Temperature control member; 421, Housing; 4211, Accommodating space; 4212, Driving channel; 4213, Thermosensitive medium; 422, Driving member; 4221, Second meshing tooth; 43, Reset member; 5, Rubber ball cleaning device; 51, Ball outlet end; 52, Ball receiving end; 6, Flow detection member; 7, Conductivity detection member. Detailed implementation manners

[0025] The following further elaborates on this application Figures 1 - 9 in conjunction with the appended drawings.

[0026] The embodiment of this application discloses a waste heat recovery system 100 for lithium battery wastewater.

[0027] Referring to Figure 1 , Figure 4 , Figure 5 and Figure 6 , the waste heat recovery system 100 for lithium battery wastewater according to the embodiment of this application includes: a wastewater pipeline 1, a heating pipeline 2, a heat exchanger 3, and an opening and closing assembly 4.

[0028] The wastewater pipeline 1 is used to convey wastewater, and the heating pipeline 2 is used to convey the liquid to be heated.

[0029] In some specific embodiments, the wastewater can be the condensate water in the lithium carbonate MVR (Mechanical Vapor Recompression) process, and the liquid to be heated can be the brine material in the lithium carbonate MVR process.

[0030] 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 pipeline 33 and a second pipeline 34. The first pipeline 33 is connected to the wastewater pipeline 1, and the second pipeline 34 is connected to the heating pipeline 2. Specifically, the first pipelines 33 of the first heat exchange chamber 31 and the second heat exchange chamber 32 are both connected to the wastewater pipeline 1, and the second pipelines 34 of the first heat exchange chamber 31 and the second heat exchange chamber 32 are both connected to the heating pipeline 2.

[0031] Moreover, heat exchange is suitable to occur between the first pipeline 33 and the second pipeline 34. Specifically, a plurality of heat exchange fins 38 are provided between the first pipeline 33 and the second pipeline 34. The plurality of heat exchange fins 38 are spaced apart along the first direction of the heat exchanger 3. Heat exchange occurs between the first pipeline 33 and the second pipeline 34 through the plurality of heat exchange fins 38. That is to say, the wastewater in the first pipeline 33 heats the liquid to be heated in the second pipeline 34 through the plurality of heat exchange fins 38. The first direction of the heat exchanger 3 may refer to Figure 2 the left - right direction in

[0032] In some specific embodiments, the heat exchange fins 38 are preferably heat - exchange fins.

[0033] Furthermore, the opening - closing assembly 4 is arranged in the second heat exchange chamber 32. The opening - closing assembly 4 includes an opening - closing member 41, a temperature control member 42, and a reset member 43. The opening - closing member 41 is arranged on the first pipeline 33 and the second pipeline 34 in the second heat exchange chamber 32. The temperature control member 42 is connected to the first pipeline 33 in the second heat exchange chamber 32. The temperature control member 42 is in transmission connection with both the opening - closing member 41 and the reset member 43. When the temperature of the wastewater in the first pipeline 33 is not less than the preset temperature, the temperature control member 42 drives the opening - closing member 41 to open the first pipeline 33 and the second pipeline 34. When the temperature of the wastewater in the first pipeline 33 is less than the preset temperature, the reset member 43 drives the temperature control member 42 to drive the opening - closing member 41 to close the first pipeline 33 and the second pipeline 34.

[0034] Specifically, when the temperature of the wastewater in the first pipeline 33 is greater than or equal to the preset temperature, the temperature control member 42 drives the opening - closing member 41 to open the first pipeline 33 and the second pipeline 34 in the second heat exchange chamber 32. The wastewater in the wastewater pipeline 1 simultaneously flows into the first pipelines 33 of the first heat exchange chamber 31 and the second heat exchange chamber 32, and the liquid to be heated in the heating pipeline 2 simultaneously flows into the second pipelines 34 of the first heat exchange chamber 31 and the second heat exchange chamber 32. The wastewater in the first pipeline 33 of the first heat exchange chamber 31 heats the liquid to be heated in the second pipeline 34 of the first heat exchange chamber 31, and the wastewater in the first pipeline 33 of the second heat exchange chamber 32 heats the liquid to be heated in the second pipeline 34 of the second heat exchange chamber 32.

[0035] When the temperature of the wastewater in the first pipeline 33 is lower than the preset temperature, the reset member 43 drives the temperature control member 42 to drive the opening and closing member 41 to close the first pipeline 33 and the second pipeline 34 in the 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 liquid to be heated in the heating pipeline 2 flows into the second pipeline 34 of the first heat exchange chamber 31. The wastewater in the first pipeline 33 in the first heat exchange chamber 31 heats the liquid to be heated in the second pipeline 34 in the first heat exchange chamber 31.

[0036] It should be noted that the opening and closing member 41 is not arranged at the end of the first pipeline 33. The wastewater in the wastewater pipeline 1 can flow between the opening and closing member 41 and the end of the first pipeline 33 in the second heat exchange chamber 32. The connection between the temperature control member 42 and the first pipeline 33 in the second heat exchange chamber 32 is located between the opening and closing member 41 and the end of the first pipeline 33 in the second heat exchange chamber 32.

[0037] Thus, by arranging the opening and closing member 41 in the first pipeline 33 and the second pipeline 34 in the second heat exchange chamber 32, the temperature control member 42 controls the opening and closing member 41 to open or close the first pipeline 33 and the second pipeline 34 in the second heat exchange chamber 32 according to the temperature of the wastewater in the first pipeline 33. When the temperature of the wastewater in the first pipeline 33 is not lower than the preset temperature, the temperature control member 42 drives the opening and closing member 41 to open the first pipeline 33 and the second pipeline 34 in the second heat exchange chamber 32. When the temperature of the wastewater in the first pipeline 33 is lower than the preset temperature, the reset member 43 drives the temperature control member 42 to drive the opening and closing member 41 to close the first pipeline 33 and the second pipeline 34 in 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, so that the waste heat of the wastewater can be utilized as fully as possible, and thus the overall heat energy recovery rate can be improved.

[0038] Refer to Figures 3 - 6 In some embodiments of the present application, a third pipeline 35 is provided in the second heat exchange chamber 32. The third pipeline 35 is communicated with the first pipeline 33 located in the second heat exchange chamber 32. Specifically, the connection between the third pipeline 35 and the first pipeline 33 is located between the opening and closing member 41 and the end of the first pipeline 33. When the opening and closing member 41 opens or closes the corresponding first pipeline 33 and the second pipeline 34, the wastewater in the wastewater pipeline flows into the third pipeline 35 through the first pipeline 33.

[0039] In addition, the temperature control unit 42 includes a shell 421 and a driving member 422. The shell 421 is arranged in the third pipeline 35 and is suitable for contacting the wastewater in the first pipeline 33. The shell 421 defines a accommodating space 4211 and a driving channel 4212. The driving channel 4212 is connected to the accommodating space 4211. The accommodating space 4211 is used to accommodate a thermosensitive medium 4213 suitable for thermal expansion and contraction. The shell 421 conducts the temperature of the wastewater to the thermosensitive medium 4213 in the accommodating space 4211. The driving member 422 is movably arranged in the driving channel 4212 and the end portion extends out of the third pipeline 35. That is, when the driving member 422 is driven, it moves along the driving channel 4212. The reset member 43 is elastically deformably arranged between the driving member 422 and the inner peripheral wall of the second heat exchange chamber 32. The driving member 422 is transmission-connected to the opening and closing member 41 and the reset member 43.

[0040] When the thermosensitive medium 4213 expands, the thermosensitive medium 4213 drives the driving member 422 to move away from the shell 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 shell 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.

[0041] Specifically, when the temperature of the wastewater in the first pipeline 33 is not less than the preset temperature, the thermosensitive medium 4213 expands, and the thermosensitive medium 4213 flows into the driving channel 4212, and then the thermosensitive medium 4213 drives the driving member 422 to move along the driving channel 4212 away from the shell 421, and the driving member 422 drives the opening and closing member 41 to open the first pipeline 33 and the second pipeline 34, and the driving member 422 compresses the reset member 43, and the elastic force applied by the reset member 43 to the driving member 422 is less than the thrust applied by the thermosensitive medium 4213 to the driving member 422.

[0042] When the temperature of the wastewater in the first pipeline 33 is lower than the preset temperature, the thermosensitive medium 4213 contracts, and the elastic force applied by the reset member 43 to the driving member 422 is greater than the thrust applied by the thermosensitive medium 4213 to the driving member 422. The reset member 43 drives the driving member 422 to move along the driving channel 4212 close to the shell 421, and the driving member 422 drives the opening and closing member 41 to close the first pipeline 33 and the second pipeline 34, and the driving member 422 drives the thermosensitive medium 4213 located in the driving channel 4212 to flow into the accommodating space 4211, thereby achieving the technical effect of driving the opening and closing member 41 to open or close the corresponding first pipeline 33 and the second pipeline 34 through the temperature control unit 42 and the reset member 43.

[0043] In some specific embodiments, the heat-sensitive medium 4213 may be paraffin or the like.

[0044] In some specific embodiments, the reset member 43 is preferably a spring.

[0045] Referring to Figure 4 、 Figure 6 and Figure 7 , in some embodiments of the present application, a guide member 321 is provided on the inner peripheral wall of the second heat exchange chamber 32. 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. Specifically, along the height direction of the heat exchanger 3, the guide hole 3212 forms guide notches 3213 on both the upper end wall and the lower end wall in the guide groove 3211. That is to say, the diameter dimension of the guide hole 3212 is greater than the height dimension of the guide groove 3211. The height direction of the heat exchanger 3 may refer to Figure 7 the up and down direction in

[0046] Moreover, the driving member 422 extends into the guide groove 3211 and is in guiding cooperation with the guide groove 3211. The reset member 43 is disposed in the guide hole 3212. The reset member 43 is elastically deformably arranged between the driving member 422 and the bottom wall of the guide hole 3212. The guide hole 3212 and the reset member 43 are in guiding cooperation. The reset member 43 extends into the guide notch 3213. The outer peripheral wall of the reset member 43 is adapted to abut and be in limiting cooperation with the inner peripheral wall of the guide notch 3213.

[0047] By the guiding cooperation between the driving member 422 and the guide groove 3211, the driving member 422 can be prevented from deviating from the preset movement track, and it can be avoided that the driving member 422 cannot drive the opening and closing member 41 to open or close the corresponding first pipeline 33 and second pipeline 34. And by the guiding cooperation between the reset member 43 and the guide hole 3212, when the driving member 422 compresses the reset member 43 and the reset member 43 elongates and restores, the reset member 43 can be prevented from deviating from the preset movement track, so that it can be prevented that the reset member 43 cannot drive the driving member 422 to move close to the housing 421, and thus the movement stability of the driving member 422 can be improved.

[0048] Referring to Figure 3 、 Figure 4 and Figure 6, in some embodiments of the present application, the opening and closing member 41 includes a first blocking portion 411, a second blocking portion 412, and a transmission portion 413. The first blocking portion 411 is pivotally disposed on the first pipeline 33, the second blocking portion 412 is pivotally disposed on the second pipeline 34, the transmission portion 413 is connected between the first blocking portion 411 and the second blocking portion 412. A first engaging tooth 414 is provided on the outer peripheral wall of the transmission portion 413, and the first engaging tooth 414 is located between the first pipeline 33 and the second pipeline 34. The driving member 422 is provided with a second engaging tooth 4221, and the first engaging tooth 414 and the second engaging tooth 4221 are meshed and connected. The blocking portion is used to open or close the corresponding pipeline. That is to say, the first blocking portion 411 is used to open or close the first pipeline 33 in the second heat exchange chamber 32, and the second blocking portion 412 is used to open or close the second pipeline 34 in the second heat exchange chamber 32.

[0049] When the thermosensitive medium 4213 expands and the thermosensitive medium 4213 drives the driving member 422 to move away from the housing 421, the driving member 422 drives the transmission portion 413 to rotate around the central axis of the transmission portion 413 through the first engaging tooth 414 and the second engaging tooth 4221. The transmission portion 413 drives the first blocking portion 411 and the second blocking portion 412 to rotate, so that the first blocking portion 411 opens the first pipeline 33 and the second blocking portion 412 opens the second pipeline 34, thereby achieving the technical effect that the driving member 422 drives the opening and closing member 41 to open the first pipeline 33 and the second pipeline 34.

[0050] When the thermosensitive medium 4213 contracts and the reset member 43 drives the driving member 422 to move close to the housing 421, the driving member 422 drives the transmission portion 413 to rotate around the central axis of the transmission portion 413 through the first engaging tooth 414 and the second engaging tooth 4221. The transmission portion 413 drives the first blocking portion 411 and the second blocking portion 412 to rotate, so that the first blocking portion 411 closes the first pipeline 33 and the second blocking portion 412 closes the second pipeline 34, thereby achieving the technical effect that the driving member 422 drives the opening and closing member 41 to close the first pipeline 33 and the second pipeline 34.

[0051] Further, there are multiple first engaging teeth 414, and the multiple first engaging teeth 414 are arranged in sequence along the circumferential direction of the transmission portion 413. There are multiple second engaging teeth 4221, and the multiple second engaging teeth 4221 are arranged in sequence along the first direction of the heat exchanger 3.

[0052] Refer to Figure 5 , in some embodiments of the present application, there are multiple second heat exchange chambers 32 and opening and closing assemblies 4. The multiple second heat exchange chambers 32 and the multiple opening and closing assemblies 4 are both arranged in sequence along the second direction of the heat exchanger 3, and the multiple second heat exchange chambers 32 and the multiple opening and closing assemblies 4 are arranged in one-to-one correspondence. The second direction of the heat exchanger 3 can be Figure 5 the front-back direction in

[0053] By providing a plurality of second heat exchange chambers 32 and a plurality of opening and closing components 4, when the temperature of the wastewater in the wastewater pipeline 1 is not less than the preset temperature, the opening and closing component 4 opens the first pipeline 33 and the second pipeline 34 in the corresponding second heat exchange chamber 32. The wastewater in the wastewater pipeline 1 simultaneously flows into the first pipeline 33 in the first heat exchange chamber 31 and the first pipelines 33 in the plurality of second heat exchange chambers 32, and the liquid to be heated in the heating pipeline 2 simultaneously flows into the second pipeline 34 in the first heat exchange chamber 31 and the second pipelines 34 in the plurality of second heat exchange chambers 32. The wastewater in the wastewater pipeline 1 can heat the liquid to be heated through the plurality of second heat exchange chambers 32, so as to further make full use of the waste heat of the wastewater, and thus improve the overall heat energy recovery rate.

[0054] In some specific embodiments, the first heat exchange chamber 31 can be located between any two adjacent second heat exchange chambers 32.

[0055] In some other specific embodiments, the first heat exchange chamber 31 can be located at the front end or the rear end of the plurality of second heat exchange chambers 32.

[0056] Referring to Figure 2 、 Figure 8 and Figure 9 In some embodiments of the present application, along the first direction of the heat exchanger 3, the heat exchanger 3 has opposite first side wall 36 and second side wall 37. In some specific embodiments, the first side wall 36 can be the right side wall of the heat exchanger 3, and the second side wall 37 can be the left side wall of the heat exchanger 3.

[0057] The first side wall 36 is provided with a first liquid inlet 361 and a first liquid outlet 362, and the second side wall 37 is provided with a second liquid inlet 371 and a second liquid outlet 372. Each first pipeline 33 is communicated with the first liquid inlet 361 and the second liquid outlet 372, and each second pipeline 34 is communicated with the second liquid inlet 371 and the first liquid outlet 362. Specifically, the first pipelines 33 in the first heat exchange chamber 31 and the second heat exchange chambers 32 are both communicated with the first liquid inlet 361, the first pipelines 33 in the first heat exchange chamber 31 and the second heat exchange chambers 32 are both communicated with the second liquid outlet 372, the second pipelines 34 in the first heat exchange chamber 31 and the second heat exchange chambers 32 are both communicated with the second liquid inlet 371, and the first pipelines 33 in the first heat exchange chamber 31 and the second heat exchange chambers 32 are both communicated with the first liquid outlet 362.

[0058] The wastewater pipeline 1 is communicated with both the first liquid inlet 361 and the second liquid outlet 372, and the heating pipeline 2 is communicated with both the second liquid inlet 371 and the first liquid outlet 362. The wastewater enters the first pipeline 33 from the first liquid inlet 361, and the liquid to be heated enters the second pipeline 34 from the second liquid inlet 371.

[0059] By setting the flow direction of the wastewater and the flow direction of the liquid to be heated to be in opposite directions, compared with setting the flow direction of the wastewater and the flow direction of the liquid to be heated to be in the same direction, when both the wastewater and the liquid to be heated are flowing, the wastewater can continuously face the unheated liquid to be heated, and the wastewater can continuously heat the unheated liquid to be heated, thereby improving the utilization rate of the waste heat of the wastewater.

[0060] Referring to Figure 1 , in some embodiments of the present application, the lithium battery wastewater waste heat recovery system 100 further includes: a rubber ball cleaning device 5, the rubber ball cleaning device 5 is arranged on the heating pipeline 2, the ball outlet end 51 and the ball receiving end 52 of the rubber ball cleaning device 5 are both communicated with the heating pipeline 2, along the conveying direction of the liquid to be heated, the rubber ball cleaning device 5 is located on the downstream side of the heat exchanger 3, the communication part between the ball outlet end 51 and the heating pipeline 2 is located on the upstream side of the heat exchanger 3, the communication part between the ball receiving end 52 and the heating pipeline 2 is located on the downstream side of the heat exchanger 3, and the rubber ball cleaning device 5 is used for outputting rubber balls to the second pipeline 34 to clean the sundries in the second pipeline 34, and for separating the rubber balls and the liquid to be heated.

[0061] Specifically, the ball outlet end 51 of the rubber ball cleaning device 5 outputs rubber balls, the rubber balls enter into a plurality of second pipelines 34 in the heat exchanger 3 through the second liquid inlet 371, the rubber balls collide with the inner peripheral wall of the second pipeline 34 and clean the sundries attached to the inner peripheral wall of the second pipeline 34, the sundries attached to the inner peripheral wall of the second pipeline 34 and the rubber balls flow into the ball receiving end 52 of the rubber ball cleaning device 5 through the first liquid outlet 362, the rubber ball cleaning device 5 separates the rubber balls and the liquid to be heated, the rubber balls are recovered by the rubber ball cleaning device 5, and the liquid to be heated flows out of the rubber ball cleaning device 5 and flows into the heating pipeline 2. Such a setting can reduce the sundries attached to the second pipeline 34, avoid the sundries attached to the second pipeline 34 from reducing the heat exchange efficiency between the liquid to be heated and the wastewater, and further improve the overall heat energy recovery rate of the lithium battery wastewater waste heat recovery system 100.

[0062] Furthermore, the heating pipeline 2 is provided with a filtering device, along the conveying direction of the liquid to be heated, the filtering device is located on the downstream side of the rubber ball cleaning device 5, when the liquid to be heated flows out of the rubber ball cleaning device 5 and flows into the heating pipeline 2, the liquid to be heated flows into the filtering device, and the filtering device filters the sundries attached to the inner peripheral wall of the second pipeline 34 in the liquid to be heated.

[0063] It should be noted that the concentration of calcium and magnesium ions in the brine material is relatively high, and the brine material is likely to form scale in the second pipeline 34, and the scale affects the heat exchange efficiency between the brine material and the wastewater.

[0064] In some specific embodiments, the rubber ball cleaning device 5 can be a rubber ball cleaning device 5 for a condenser.

[0065] Referring to Figure 1 , in some embodiments of the present application, the waste heat recovery system 100 for lithium battery wastewater further includes: a flow detection member 6 and a controller. The flow detection member 6 is disposed in the heating pipeline 2. The flow detection member 6 is used to detect the flow rate of the liquid to be heated in the heating pipeline 2. Both the rubber ball cleaning device 5 and the flow detection member 6 are connected to the controller. The controller is used to control the rubber ball cleaning device 5 to output or stop outputting rubber balls according to the detection signal of the flow detection member 6.

[0066] Specifically, when the flow rate of the liquid to be heated in the heating pipeline 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 member 6, so as to enable the rubber balls to clean the sundries in the plurality of second pipelines 34, thereby avoiding the blockage of the second pipelines 34 by the sundries in the second pipelines 34, and further improving the flow stability of the liquid to be heated in the heating pipeline 2.

[0067] When the flow rate of the liquid to be heated in the heating pipeline 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 member 6, thereby avoiding the reduction of the flow rate of the liquid to be heated in the second pipeline 34 caused by the rubber balls occupying the space in the second pipeline 34.

[0068] In some specific embodiments, the flow detection member 6 may be a turbine flowmeter, but the present application is not limited thereto. The flow detection member 6 may also be a positive displacement flowmeter, etc.

[0069] Referring to Figure 1 , in some embodiments of the present application, the waste heat recovery system 100 for lithium battery wastewater further includes: a conductivity detection member 7. The conductivity detection member 7 is disposed in the wastewater pipeline 1. Along the wastewater conveying direction of the wastewater pipeline 1, the conductivity detection member 7 is located on the downstream side of the heat exchanger 3, that is to say, the conductivity detection member 7 is located on the downstream side of the second liquid outlet 372. The conductivity detection member 7 is used to detect the conductivity of the wastewater. The conductivity detection member 7 is communicatively connected to the controller. The controller is used to send an alarm signal according to the detection signal of the conductivity detection member 7.

[0070] Specifically, the concentration of calcium and magnesium ions in the brine material is relatively high. When both the first pipeline 33 and the second pipeline 34 in the heat exchanger 3 are ruptured, the liquid to be heated mixes into the wastewater, the concentration of calcium and magnesium ions in the wastewater increases, and the conductivity of the wastewater increases. When the conductivity of the wastewater is greater than or equal to the preset conductivity value, the controller sends an alarm signal according to the conductivity detection member 7. The alarm signal is used to prompt the operator that the first pipeline 33 and the second pipeline 34 in the heat exchanger 3 are ruptured. The operator closes the wastewater pipeline 1 and the heating pipeline 2 according to the alarm signal, so as to stop the wastewater pipeline 1 from conveying wastewater and the heating pipeline 2 from conveying the liquid to be heated.

[0071] In some specific embodiments, the conductivity detection member 7 may be a conductivity sensor, but the present application is not limited thereto. The conductivity detection member 7 may also be a capacitive conductivity probe.

[0072] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A waste heat recovery system for lithium battery wastewater, characterized in that, Comprising: A waste water pipeline (1) and a heating pipeline (2), the waste water pipeline (1) is used for conveying waste water, and the heating pipeline (2) is used for conveying the liquid to be heated; A heat exchanger (3), 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 pipeline (33) and a second pipeline (34), the first pipeline (33) is communicated with the waste water pipeline (1), the second pipeline (34) is communicated with the heating pipeline (2), and heat exchange is suitable to be carried out between the first pipeline (33) and the second pipeline (34); An opening and closing assembly (4), the opening and closing assembly (4) is arranged in the second heat exchange chamber (32), the opening and closing assembly (4) includes an opening and closing member (41), a temperature control member (42) and a reset member (43), the opening and closing member (41) is arranged on the first pipeline (33) and the second pipeline (34), the temperature control member (42) is communicated with the first pipeline (33), and the temperature control member (42) is in transmission connection with both the opening and closing member (41) and the reset member (43); When the temperature of the waste water in the first pipeline (33) is not less than the preset temperature, the temperature control member (42) drives the opening and closing member (41) to open the first pipeline (33) and the second pipeline (34), and when the temperature of the waste water in the first pipeline (33) is less than the preset temperature, the reset member (43) drives the temperature control member (42) to drive the opening and closing member (41) to close the first pipeline (33) and the second pipeline (34).

2. The waste heat recovery system for lithium battery wastewater according to claim 1, wherein A third pipeline (35) is arranged in the second heat exchange chamber (32), the third pipeline (35) is communicated with the first pipeline (33) located in the second heat exchange chamber (32), the temperature control member (42) includes a housing (421) and a driving member (422), the housing (421) is arranged on the third pipeline (35) and is suitable to be in contact with the waste water in the first pipeline (33), the housing (421) defines a receiving space (4211) and a driving channel (4212), the driving channel (4212) is communicated with the receiving space (4211), the receiving space (4211) is used for receiving a heat-sensitive medium (4213) suitable for thermal expansion and contraction, the driving member (422) is movably arranged in the driving channel (4212) and the end portion extends out of the third pipeline (35), the reset member (43) is elastically deformable and is arranged between the driving member (422) and the inner peripheral wall of the second heat exchange chamber (32), and the driving member (422) is in transmission connection with both the opening and closing member (41) and the reset member (43); When the thermal medium (4213) expands, the thermal 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 thermal medium (4213) contracts, the reset member (43) drives the driving member (422) to move close 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).

3. The waste heat recovery system for lithium battery wastewater according to claim 2, characterized in that, A guiding member (321) is provided on the inner peripheral wall of the second heat exchange chamber (32). The guiding member (321) is provided with a guiding groove (3211) and a guiding hole (3212). The guiding hole (3212) is located in the guiding groove (3211). The guiding hole (3212) forms a guiding notch (3213) on the inner peripheral wall of the guiding groove (3211). The driving member (422) extends into the guiding groove (3211) and is in guiding cooperation with the guiding groove (3211). The reset member (43) is arranged in the guiding hole (3212). The reset member (43) is elastically deformably arranged between the driving member (422) and the bottom wall of the guiding hole (3212). The guiding hole (3212) and the reset member (43) are in guiding cooperation.

4. A lithium battery wastewater waste heat recovery system according to claim 2, characterized in that, The opening and closing member (41) includes a first blocking portion (411), a second blocking portion (412) and a transmission portion (413). The first blocking portion (411) is pivotally arranged on the first pipeline (33). The second blocking portion (412) is pivotally arranged on the second pipeline (34). The transmission portion (413) is connected between the first blocking portion (411) and the second blocking portion (412). The outer peripheral wall of the transmission portion (413) is provided with first engaging teeth (414). The driving member (422) is provided with second engaging teeth (4221). The first engaging teeth (414) and the second engaging teeth (4221) are meshed and connected. The blocking portion is used to open or close the corresponding pipeline.

5. A waste heat recovery system for lithium battery wastewater according to claim 1, characterized in that, Both the second heat exchange chamber (32) and the opening and closing assembly (4) are multiple. The multiple second heat exchange chambers (32) and the multiple opening and closing assemblies (4) are arranged in sequence along the second direction of the heat exchanger (3), and the multiple second heat exchange chambers (32) and the multiple opening and closing assemblies (4) are arranged in one-to-one correspondence.

6. The waste heat recovery system for lithium battery wastewater according to claim 1, wherein In the first direction of the heat exchanger (3), the heat exchanger (3) has opposite first side wall (36) and second side wall (37). The first side wall (36) is provided with a first liquid inlet (361) and a first liquid outlet (362), and the second side wall (37) is provided with a second liquid inlet (371) and a second liquid outlet (372). Each of the first pipelines (33) is communicated with the first liquid inlet (361) and the second liquid outlet (372), and each of the second pipelines (34) is communicated with the second liquid inlet (371) and the first liquid outlet (362). The wastewater pipeline (1) is communicated with both the first liquid inlet (361) and the second liquid outlet (372), and the heating pipeline (2) is communicated with both the second liquid inlet (371) and the first liquid outlet (362). Wastewater enters the first pipeline (33) from the first liquid inlet (361), and the liquid to be heated enters the second pipeline (34) from the second liquid inlet (371).

7. A waste heat recovery system for lithium battery wastewater according to claim 1, wherein, Further comprising: A rubber ball cleaning device (5). The rubber ball cleaning device (5) is arranged on the heating pipeline (2). The rubber ball outlet end (51) and the rubber ball receiving end (52) of the rubber ball cleaning device (5) are both communicated with the heating pipeline (2). Along the conveying direction of the liquid to be heated, the rubber ball cleaning device (5) is located on the downstream side of the heat exchanger (3). The connection part between the rubber ball outlet end (51) and the heating pipeline (2) is located on the upstream side of the heat exchanger (3), and the connection part between the rubber ball receiving end (52) and the heating pipeline (2) is located on the downstream side of the heat exchanger (3). The rubber ball cleaning device (5) is used for outputting rubber balls to the second pipeline (34) to clean sundries in the second pipeline (34), and for separating rubber balls and the liquid to be heated.

8. A waste heat recovery system for lithium battery wastewater according to claim 7, characterized in that, Further comprising: a flow rate detecting element (6) and a controller. The flow rate detecting element (6) is arranged on the heating pipeline (2). The flow rate detecting element (6) is used for detecting the flow rate of the liquid to be heated in the heating pipeline (2). Both the rubber ball cleaning device (5) and the flow rate detecting element (6) are communicated with the controller. The controller is used for controlling the rubber ball cleaning device (5) to output or stop outputting rubber balls according to the detection signal of the flow rate detecting element (6).

9. A waste heat recovery system for lithium battery wastewater according to claim 1, characterized in that, Further comprising: A conductivity detecting element (7) and a controller. The conductivity detecting element (7) is arranged on the wastewater pipeline (1). Along the wastewater conveying direction of the wastewater pipeline (1), the conductivity detecting element (7) is located on the downstream side of the heat exchanger (3). The conductivity detecting element (7) is used for detecting the conductivity of the wastewater. The conductivity detecting element (7) is communicatively connected with the controller. The controller is used for sending an alarm signal according to the detection signal of the conductivity detecting element (7).

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