Waste liquid recovery device

Abstract

The utility model discloses a waste liquid recovery device. The waste liquid recovery device comprises an evaporation module, a drying and separating module and a material inlet, the evaporation module comprises a first shell and a plurality of tube bodies arranged in the first shell in parallel, a tube pass space is formed in each tube body, a space outside the tube pass space in the first shell forms a shell pass space, the tube pass space is used for allowing a waste liquid mixture to pass along the gravity direction, and the shell pass space is used for introducing a heat source medium; the drying and separating module is arranged above the evaporation module in the gravity direction, a drying and separating cavity is formed in the drying and separating module, the drying and separating cavity communicates with the tube pass space, and a drying and separating assembly is arranged in the drying and separating cavity; the material inlet is formed in the evaporation module or the drying separation module, is located above the tube pass space in the gravity direction and is used for introducing a waste liquid mixture.

Description

Technical Field

[0001] This application relates to the technical field of evaporation separation equipment, and particularly relates to a waste liquid recovery device. Background Art

[0002] In the process of copper foil manufacturing, sulfuric acid is usually used to dissolve copper. To ensure the efficient and smooth progress of the chemical reaction between sulfuric acid and metallic copper in the production system, sulfuric acid needs to be adjusted to an appropriate concentration. However, it is difficult to control the concentration of sulfuric acid, and the sulfuric acid concentration often tends to be too high or too low. When the sulfuric acid concentration is too low, it means that there is too much water in the sulfuric acid solution and the overall solution volume is also too large, which is likely to cause an overflow problem in the reaction system. Since the overflowing sulfuric acid solution (waste liquid) still contains a large amount of metal ions (such as copper ions), if these waste liquids are directly discharged, on the one hand, it does not meet the discharge requirements, and on the other hand, it will cause waste of sulfuric acid and copper ions. Therefore, there is an urgent need for a recovery device that can evaporate and concentrate the waste liquid. Utility Model Content

[0003] To solve at least one of the above technical problems, this application provides a waste liquid recovery device that can evaporate and concentrate the waste liquid so that the concentrated waste liquid can be reused. The technical solutions adopted are as follows.

[0004] The waste liquid recovery device provided in this application includes an evaporation module, a drying and separation module, and a material inlet. The evaporation module includes a first housing and a plurality of tubes arranged in parallel within the first housing. A tube-side space is formed inside the tubes, and a shell-side space is formed in the space outside the tube-side space within the first housing. The tube-side space is used for the waste liquid mixture to pass through along the gravity direction, and the shell-side space is used for introducing a heat source medium. The drying and separation module is arranged above the evaporation module along the gravity direction. A drying and separation chamber is formed in the drying and separation module, and the drying and separation chamber communicates with the tube-side space. A drying and separation component is provided in the drying and separation chamber. The material inlet is arranged in the evaporation module or the drying and separation module and is located above the tube-side space along the gravity direction. The material inlet is used for introducing the waste liquid mixture.

[0005] In some embodiments of this application, the tube includes a first tube and a second tube, and the inner diameter of the first tube is larger than the inner diameter of the second tube.

[0006] In some embodiments of this application, the evaporation module includes a plurality of the second tubes, and the plurality of the second tubes are arranged around the first tube.

[0007] In some embodiments of this application, the drying and separation component includes at least one filter screen, and the filter screen is at least used for filtering solid particles in the steam or for drying the steam.

[0008] In some embodiments of the present application, the drying and separation module includes a second housing, a drying and separation chamber is formed in the second housing, and the second housing is detachably connected to the first housing.

[0009] In some embodiments of the present application, the waste liquid recovery device further includes a material preheater, the material preheater is arranged upstream of the material inlet, the drying and separation module is provided with a steam outlet, the steam outlet is communicated with the material preheater, and the material preheater is used for heating the waste liquid mixture.

[0010] In some embodiments of the present application, the waste liquid recovery device further includes a cooling module and a discharge port, the discharge port is communicated with the tube-side space, and the cooling module is communicated with the discharge port.

[0011] In some embodiments of the present application, the waste liquid recovery device further includes a third housing, the third housing is detachably connected to the bottom of the first housing, and the discharge port is arranged in the third housing.

[0012] In some embodiments of the present application, the waste liquid recovery device further includes a control mechanism and a detection component, the detection component includes a temperature sensor arranged in the drying and separation module, a liquid level sensor arranged at the inlet of the tube-side space, a concentration sensor arranged at the discharge port of the evaporation module, and a humidity sensor arranged at the steam outlet of the drying and separation module, and the control mechanism is electrically connected to the detection component.

[0013] The embodiments of the present application have at least the following beneficial effects: By setting an evaporation module and enabling the waste liquid mixture to flow down by gravity in the tube-side space, in this way, no additional power (such as a pump body, etc.) is required to provide the flow of the waste liquid. The heat source medium exchanges heat with the waste liquid mixture in the evaporation module, and after the waste liquid mixture is heated, a part of the water is evaporated and separated, so that a concentrated material liquid can be obtained. The concentrated material liquid can meet the concentration requirements of the solution, so that the material liquid can be reused, and the evaporated water enters the drying and separation chamber in the form of high-temperature steam and is recycled after being dried in the drying and separation module. Therefore, by using the waste liquid recovery device of the present application, it is possible to avoid the direct discharge of the overflowing sulfuric acid waste liquid, but to evaporate and concentrate the sulfuric acid waste liquid and then reuse it, avoiding the waste of sulfuric acid and copper ions. Description of the Drawings

[0014] The aspects and advantages described and / or appended in the embodiments of the present application will become obvious and easy to understand in conjunction with the following drawings. It should be noted that the embodiments shown in the following drawings are exemplary and are only used to explain the present application and should not be construed as a limitation of the present application.

[0015] Figure 1 It is a schematic structural diagram of the first example of the waste liquid recovery device provided by the embodiment of the present application;

[0016] Figure 2 is Figure 1 The partial enlarged view of point A of;

[0017] Figure 3 It is a schematic structural diagram of the second example of the waste liquid recovery device provided by the embodiment of the present application.

[0018] Reference numerals: 100, waste liquid recovery device; 10, evaporation module; 11, first housing; 12, pipe body; 121, first pipe; 122, second pipe; 13, baffle plate; 14, heat source medium inlet; 15, heat source medium outlet; 20, drying and separation module; 21, drying chamber; 22, drying and separation assembly; 221, coarse screening filter; 222, wire mesh dehumidifier; 23, second housing; 24, temperature detection opening; 25, liquid level detection opening; 26, steam outlet; 30, material inlet; 40, material preheater; 50, cooling module; 51, heat storage device; 60, third housing; 61, discharge port; 62, concentration detection opening. Detailed Description of the Invention

[0019] Next, in combination with Figures 1 to 3 The embodiments of the present application will be described in detail. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described by referring to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation of the present application.

[0020] In the description of the present application, it should be understood that if terms such as "center", "middle", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise stated, the meaning of "a plurality" is two or more.

[0021] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0022] Please refer to Figure 1 and Figure 2 , the present application provides a waste liquid recovery device 100, which includes an evaporation module 10, a drying and separation module 20, and a material inlet 30. The evaporation module 10 includes a first housing 11 and a plurality of tubes 12 arranged in parallel within the first housing 11. A tube-side space is formed inside the tubes 12, and the space outside the tube-side space within the first housing 11 forms a shell-side space. The tube-side space is used for the waste liquid mixture to pass through along the gravity direction, and the shell-side space is used for introducing a heat source medium. The drying and separation module 20 is arranged above the evaporation module 10 along the gravity direction. A drying and separation chamber is formed in the drying and separation module 20, and the drying and separation chamber communicates with the tube-side space. A drying and separation component 22 is provided in the drying and separation chamber; the material inlet 30 is arranged in the evaporation module 10 or the drying and separation module 20, and is located above the tube-side space along the gravity direction. The material inlet 30 is used for introducing the waste liquid mixture. By providing the evaporation module 10 and enabling the waste liquid mixture to flow down by itself under the action of its own gravity in the tube-side space, in this way, there is no need to provide additional power (such as a pump body, etc.) for the flow of the waste liquid. Using a heat source medium (such as high-temperature steam) to exchange heat with the waste liquid mixture in the evaporation module 10, a part of the water is evaporated and separated from the waste liquid mixture after being heated, so that a concentrated material liquid (such as a concentrated copper-containing sulfuric acid solution) can be obtained. The concentrated material liquid can meet the concentration requirements of the solution, so that the material liquid can be reused, and the evaporated water enters the drying and separation chamber in the form of high-temperature steam and is recycled after being dried in the drying and separation module 20. Therefore, by using the waste liquid recovery device 100 of the present application, it is possible to avoid the direct discharge of overflowing sulfuric acid waste liquid, but to evaporate and concentrate the sulfuric acid waste liquid and then reuse it, avoiding the waste of sulfuric acid and copper ions.

[0023] In some embodiments, please refer to Figure 2 , the tube 12 includes a first tube 121 and a second tube 122, and the inner diameter of the first tube 121 is larger than the inner diameter of the second tube 122. By using the first tube 121 with a larger diameter, it can help the waste liquid to quickly descend along the tube and fill the space inside the tube (such as Figure 2As shown, the direction of the solid arrow in the figure is the direction of the waste liquid flowing in the first pipe body 121). By using the second pipe body 122 with a smaller diameter, the contact area between the waste liquid and the heat source medium can be increased, thereby improving the heating efficiency of the heat source medium for the waste liquid and accelerating the evaporation and discharge of the water in the waste liquid (such as Figure 2 As shown, the direction of the dashed arrow in the figure is the direction of the steam of the waste liquid flowing in the second pipe body 122). The evaporated water can rise along the second pipe body 122 and enter the drying and separation chamber to be dried and then collected and utilized.

[0024] In some embodiments, the evaporation module 10 includes a plurality of second pipe bodies 122, and the plurality of second pipe bodies 122 are arranged around the first pipe body 121. By arranging the plurality of second pipe bodies 122, the surface area of the pipe body can be further increased, thereby increasing the heat exchange area between the tube side space and the shell side space and improving the heat exchange efficiency. The plurality of second pipe bodies 122 are arranged around the first pipe body 121, which can not only ensure that the waste liquid can flow down quickly by gravity, but also provide a sufficient heat exchange area to improve the heating and evaporation efficiency of the waste liquid.

[0025] In some embodiments, the evaporation module 10 further includes a baffle plate 13, and the baffle plate 13 is arranged between the plurality of second pipe bodies 122, and the baffle plate 13 is perpendicular to the extending direction of the second pipe body 122. By using the baffle plate 13, the flow path of the heat source medium and the residence time of the heat source medium in the shell side space can be extended, so that there is sufficient heat exchange time between the heat source medium and the waste liquid, and the heating effect of the heat source medium on the waste liquid is improved.

[0026] Optionally, the first housing 11 may be provided with a heat source medium inlet 14 and a heat source medium outlet 15 communicating with the shell side space. The heat source medium is introduced into the shell side space through the heat source medium inlet 14 and leaves through the heat source medium outlet 15. The heat source medium may be, but is not limited to, high-temperature steam, etc.

[0027] The steam obtained by heating and evaporating from the waste liquid usually still contains some impurities (solid particles or water vapor) in the waste liquid. Therefore, in order to obtain clean and dry steam for reuse, in some embodiments, the drying and separation assembly 22 includes at least one filter screen, and the filter screen is at least used to filter the solid particles in the steam or to dry the steam. By using the filter screen, the impurities in the steam can be separated and filtered, so as to obtain clean and dry steam. Exemplarily, the filter screen may include a coarse screening filter screen 221 and a wire mesh dehumidifier 222. Among them, the mesh number of the wire mesh dehumidifier 222 is greater than that of the coarse screening filter screen 221, and the coarse screening filter screen 221 is arranged on the side of the wire mesh dehumidifier 222 close to the evaporation module 10. The steam evaporated from the waste liquid first passes through the coarse screening filter screen 221 and then through the wire mesh dehumidifier 222, so that the impurities and water vapor in the steam can be filtered out, and dry steam can be obtained. The dry and clean steam can be collected and reused.

[0028] In some embodiments, the drying and separation module 20 includes a second housing 23. A drying and separation chamber is formed in the second housing 23. The second housing 23 and the first housing 11 are detachably connected. By providing the detachable connection between the first housing 11 and the second housing 23, the convenience of production, transportation, and installation of the waste liquid recovery device 100 can be improved. Also, different-sized drying and separation modules 20 and evaporation modules 10 can be flexibly configured according to different usage scenario requirements, enhancing the flexibility and practicality of the configuration of the waste liquid recovery device 100. Optionally, flanges can be respectively provided at the connection between the first housing 11 and the second housing 23. The first housing 11 and the second housing 23 are connected by flanges and bolts, which can reduce the difficulty of disassembly and reinstallation when the waste liquid recovery device 100 needs to be disassembled for repair or component / module replacement.

[0029] In some embodiments, the waste liquid recovery device 100 further includes a material preheater 40. The material preheater 40 is provided upstream of the material inlet 30. The drying and separation module 20 is provided with a steam outlet 26, and the steam outlet 26 is communicated with the material preheater 40. The material preheater 40 is used to heat the waste liquid mixture. Since the steam obtained by separating the drying and separation module 20 still has a relatively high temperature, directly discarding this steam would cause waste. Therefore, the steam obtained by separating the drying and separation module 20 is used to preheat the waste liquid material. On the one hand, it can shorten the time required for the waste liquid to be heated and evaporated, improving the efficiency of waste liquid evaporation and concentration. On the other hand, the steam obtained by its evaporation can be reused, enhancing the energy utilization rate of the waste liquid recovery device 100.

[0030] Please refer to Figure 3 , after the waste liquid mixture undergoes heating and evaporation, a concentrated material liquid can be obtained. However, the material liquid is still in a high-temperature state and is difficult to be directly utilized. Therefore, in some embodiments, the waste liquid recovery device 100 further includes a cooling module 50 and a discharge port 61. The discharge port 61 is communicated with the tube-side space, and the cooling module 50 is communicated with the discharge port 61. By using the cooling module 50, the concentrated material liquid collected at the discharge port 61 can be cooled, facilitating the recycling of the material liquid. Optionally, the cooling module 50 can be a device such as a heat exchanger. The heat obtained when cooling the material liquid can also be reused in other production processes or stored using a heat storage device 51, further improving the energy utilization rate and avoiding waste of the heat of the material liquid.

[0031] In some embodiments, the waste liquid recovery device 100 further includes a third housing 60, which is detachably connected to the bottom of the first housing 11, and a material discharge opening 61 is arranged in the third housing 60. By arranging the detachable connection between the third housing 60 and the first housing 11, the installation and disassembly of the waste liquid recovery device 100 can be facilitated, enabling the waste liquid recovery device 100 to be configured and assembled in a modular form, and improving the convenience and adaptability of the use of the waste liquid recovery device 100.

[0032] Optionally, a concentration detection opening 62 can also be arranged in the third housing 60. The concentration detection opening 62 is arranged at an interval from the material discharge opening 61. A concentration detector (or concentration sensor, etc.) for the waste liquid (liquid material) can be arranged in the concentration detection opening 62. After detecting that the concentration in the liquid material reaches the target concentration, the material discharge opening 61 is opened for discharging materials, so as to recover the concentrated waste liquid.

[0033] In some embodiments, the waste liquid recovery device 100 further includes a control mechanism and a detection component. The detection component includes a temperature sensor arranged in the drying and separation module 20, a liquid level sensor arranged at the inlet of the tube-side space, a concentration sensor arranged at the material discharge opening 61 of the evaporation module 10, and a humidity sensor arranged at the steam outlet 26 of the drying and separation module 20. The control mechanism is electrically connected to the detection component. By using the electrical connection between the control mechanism and the detection component, the automatic operation of the waste liquid recovery device 100 can be more reasonably controlled according to the operating conditions and operating parameters detected by the detection component in the waste liquid recovery device 100. Correspondingly, a liquid level detection opening 25 can be arranged on the second housing 23. The liquid level detection opening 25 and the material inlet 30 are generally on the same horizontal line, and the liquid level sensor is arranged in the liquid level detection opening 25. A temperature detection opening 24 can be arranged on the second housing 23. The temperature detection opening 24 can be arranged above the material inlet 30 along the direction of gravity, and the temperature detection opening 24 is used to arrange the temperature sensor to detect the temperature in the drying chamber 21. For example, the waste liquid feeding condition can be understood according to the detection result of the liquid level sensor, so as to control the waste liquid feeding amount. Or, the concentration of the waste liquid after evaporation and concentration can also be understood according to the detection result of the concentration sensor at the material discharge opening 61, so as to judge whether the liquid material reaches the recovery concentration. Or, the steam temperature and humidity conditions of the waste liquid evaporation can also be obtained according to the detection results of the temperature sensor and the humidity sensor, so as to adjust the input amount of the heat source medium, or adjust the discharge amount of the steam outlet 26, etc. Adjusting the operating conditions of the waste liquid recovery device 100 according to the detection parameters in the above aspects helps to improve the operating efficiency, operating reliability and intelligent level of the waste liquid recovery device 100.

[0034] The method for recovering waste liquid by using the waste liquid recovery device 100 provided in this application is as follows:

[0035] S1. Provide a waste liquid mixture and introduce it into the tube-side space of the evaporation module 10 through the material inlet 30, so that the waste liquid mixture flows downward by gravity in the tube body;

[0036] S2. Provide a heat source medium and introduce it into the shell-side space of the evaporation module 10;

[0037] S3. Use the drying and separation module 20 to dry and collect the material vapor;

[0038] S4. Collect the material liquid at the discharge port 61.

[0039] By using this method to recycle the waste liquid mixture, on the one hand, the waste liquid mixture can flow downward by gravity in the evaporation module 10 and be heated and evaporated in the evaporation module 10 by using the energy provided by the heat source medium. After a part of the water in the waste liquid is evaporated, it can be concentrated. After the concentrated waste liquid reaches the concentration standard, the material liquid can be discharged through the discharge port 61, so that it can be reused in the chemical reaction system in the copper foil manufacturing process. The material liquid after discharging still has residual heat, and this residual heat can also be collected and reused through further heat exchange equipment. The evaporated water diffuses into the drying and separation module 20 in the form of water vapor. Through the filtration, separation and drying of the drying component, dry and clean steam can be obtained, and this steam can be used for preheating the waste liquid material before it enters the evaporation module 10, so as to preheat the temperature of the waste liquid mixture to be treated in advance and improve the efficiency of waste liquid evaporation and concentration.

[0040] In the description of this specification, if there are descriptions of reference terms such as "one embodiment", "some examples", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", it means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0041] The above has described the embodiments of the present application in detail with reference to the drawings, but the present application is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art in the technical field, various changes can be made without departing from the purpose of the present application.

[0042] In the description of this application, if there is a comma in the patent name, it means a "and" relationship, rather than an "or" relationship. For example, if the patent name is "a kind of A, B", it means that the content claimed in this application is: the technical solution with the theme name of A and the technical solution with the theme name of B.

Claims

1. A waste liquid recovery device, characterized in that: including an evaporation module, including a first housing and a plurality of tubes arranged in parallel within the first housing, a tube-side space being formed within the tubes, a space outside the tube-side space within the first housing being formed as a shell-side space, the tube-side space being for allowing a waste liquid mixture to pass through in the direction of gravity, and the shell-side space being for introducing a heat source medium; a drying and separation module, arranged above the evaporation module in the direction of gravity, a drying and separation chamber being formed within the drying and separation module, the drying and separation chamber being in communication with the tube-side space, and a drying and separation assembly being provided within the drying and separation chamber; a material inlet, provided in the evaporation module or the drying and separation module and located above the tube-side space in the direction of gravity, the material inlet being for introducing a waste liquid mixture.

2. The waste liquid recovery device according to claim 1, wherein: The tubes include a first tube and a second tube, the inner diameter of the first tube being greater than the inner diameter of the second tube.

3. The waste liquid recovery device according to claim 2, wherein: The evaporation module includes a plurality of the second tubes, the plurality of the second tubes being arranged around the first tube.

4. The waste liquid recovery device according to any one of claims 1 to 3, characterized in that: The drying and separation assembly includes at least one filter screen, the filter screen being at least for filtering solid particles in the steam or for drying the steam.

5. The waste liquid recovery device according to any one of claims 1 to 3, characterized in that: The drying and separation module includes a second housing, the drying and separation chamber being formed within the second housing, and the second housing and the first housing being detachably connected.

6. The waste liquid recovery device according to any one of claims 1 to 3, characterized in that: The waste liquid recovery device further includes a material preheater, the material preheater being provided upstream of the material inlet, the drying and separation module being provided with a steam outlet, the steam outlet being in communication with the material preheater, and the material preheater being for heating the waste liquid mixture.

7. The waste liquid recovery device according to any one of claims 1 to 3, characterized in that: The waste liquid recovery device further includes a cooling module and a discharge port, the discharge port being in communication with the tube-side space, and the cooling module being in communication with the discharge port.

8. The waste liquid recovery device according to claim 7, wherein: The waste liquid recovery device further includes a third housing, the third housing being detachably connected to the bottom of the first housing, and the discharge port being provided within the third housing.

9. The waste liquid recovery device according to any one of claims 1 to 3, characterized in that: The waste liquid recovery device further includes a control mechanism and a detection component, the detection component including a temperature sensor provided in the drying and separation module, a liquid level sensor provided at the inlet of the tube-side space, a concentration sensor provided at the discharge port of the evaporation module, and a humidity sensor provided at the steam outlet of the drying and separation module, and the control mechanism being electrically connected to the detection component.

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