Electroplating nickel wastewater recycling evaporation device

Abstract

The utility model discloses a kind of electroplating nickel wastewater recycling evaporation devices, including energy-saving evaporation system, cleaning system, resource recovery system and intelligent control system, energy-saving evaporation system contains waste heat recovery component, multiple-effect evaporation group, plate heat exchanger and heat pump compressor, preheat original wastewater using waste heat, reduce energy consumption in combination with multiple-effect evaporation and heat pump circulation, cleaning system is connected each effect evaporator top rotary spray head by anticorrosive pipeline, bottom is equipped with blow-off port and connects waste water pool, can remove scale, resource recovery system contains concentrated liquid storage tank, resin filter etc., can recover nickel resource and recycle condensate, intelligent control system has PLC controller and man-machine interaction module, realize automation control.

Description

Technical Field

[0001] This utility model relates to the field of nickel plating wastewater treatment and resource recycling, specifically to an evaporation device for recycling nickel plating wastewater. Background Technology

[0002] With the rapid development of the electroplating industry, the problem of nickel plating wastewater discharge has become increasingly prominent. This type of wastewater contains high concentrations of nickel ions, organic additives, and various salts. If not properly treated, it will not only cause serious environmental pollution but also lead to the waste of valuable metal resources.

[0003] Currently, traditional methods for treating nickel plating wastewater include chemical precipitation, ion exchange, and membrane separation technologies. However, these methods generally suffer from high treatment costs, secondary pollution, and low nickel resource recovery rates.

[0004] However, existing evaporation devices still face many challenges in actual operation: high energy consumption leads to high operating costs; severe scaling on the equipment affects heat transfer efficiency and shortens service life; subsequent treatment of the concentrate is difficult; and insufficient system automation leads to complex operation. These problems seriously restrict the promotion and application of evaporation technology in the field of electroplating wastewater treatment, and therefore there is room for improvement. Utility Model Content

[0005] In order to solve the problems mentioned in the background art, this application provides an electroplating nickel wastewater recycling evaporation device.

[0006] The electroplating nickel wastewater recycling evaporation device provided in this application adopts the following technical solution:

[0007] An electroplating nickel wastewater recycling evaporation device includes an energy-saving evaporation system, a cleaning system, a resource recovery system, and an intelligent control system;

[0008] The energy-saving evaporation system includes a waste heat recovery component, a multi-effect evaporation group, and a heat pump compressor. The multi-effect evaporation group is installed on the left side of the heat pump compressor and is bidirectionally connected through a stainless steel steam pipe. The waste heat recovery component is installed on the same side as the heat pump compressor. Its heat medium inlet is connected to the steam outlet of the last effect evaporator of the multi-effect evaporation group, its cold medium inlet is connected to the electroplating nickel wastewater pipe, and its outlet pipe is connected to the feed inlet of the multi-effect evaporation group.

[0009] The cleaning system is located on the left side of the multi-effect evaporation group and is connected to the rotating spray head on the top of each evaporator through a corrosion-resistant pipe. Each evaporator is also provided with a drain outlet at the bottom, which is connected to the wastewater pool through a drain pipe.

[0010] The resource recovery system is installed below the multi-effect evaporation group and includes a concentrate storage tank, a resin filter, a condenser, and a precision filter. The concentrate storage tank is connected to the bottom of the last effect evaporator of the multi-effect evaporation group through a corrosion-resistant pipe. The inlet of the resin filter is connected to the outlet of the concentrate storage tank. The condensate outlet of the condenser is connected to the precision filter through a pipe.

[0011] The intelligent control system includes a PLC controller and a human-machine interface module. The PLC control cabinet and the human-machine interface module are installed at the lower left of the multi-effect evaporation unit.

[0012] By adopting the above technical solutions, a comprehensive technical effect of high efficiency, energy saving, cleanliness, stability, resource recovery, and intelligent control can be achieved in the evaporation treatment of electroplating nickel wastewater. The energy-saving evaporation system uses the waste heat recovery component to preheat the raw wastewater with the steam waste heat of the last-effect evaporator. Combined with the synergistic effect of the multi-effect evaporation group and the heat pump compressor, the energy consumption of the evaporation process is greatly reduced, and the energy utilization efficiency is improved. The cleaning system uses rotating spray heads to regularly clean each effect evaporator and, together with the drain outlet, promptly discharges impurities to avoid scaling and blockage of the evaporator and ensure long-term stable operation of the equipment. The resource recovery system collects the concentrate in the concentrate storage tank, treats it with a resin filter to recover the nickel resources, and at the same time, the condensate produced by the condenser is filtered by a precision filter and reused, improving the utilization rate of water resources and valuable metals. The intelligent control system uses a PLC controller and a human-machine interface module to realize the automated control and real-time parameter adjustment of the entire evaporation process, improves the convenience of operation and the processing accuracy, and optimizes the treatment effect and economic benefits of electroplating nickel wastewater.

[0013] Optionally, each evaporator in the multi-effect evaporator group is arranged horizontally and connected by a steam pipe.

[0014] By adopting the above technical solution, each evaporator in the multi-effect evaporator group is arranged horizontally and connected by steam pipes, which makes the steam transport path between each evaporator shorter and the layout more compact, reduces the heat loss of steam during the transmission process, facilitates the installation, maintenance and space utilization of the equipment, ensures that steam can be transferred more smoothly between each effect, and improves the continuity and stability of the multi-effect evaporation process.

[0015] Optionally, the energy-saving evaporation system further includes a plate heat exchanger, which is connected to the waste heat recovery component via a pipeline.

[0016] By adopting the above technical solution, a plate heat exchanger is added to the energy-saving evaporation system and connected to the waste heat recovery component through a pipeline. This can further enhance the waste heat recovery effect. The plate heat exchanger has a high heat exchange efficiency and works synergistically with the waste heat recovery component to make fuller use of the waste heat of steam discharged from the last effect evaporator of the multi-effect evaporation group to preheat the raw wastewater from nickel plating. This increases the initial temperature of the raw wastewater when it enters the multi-effect evaporation group, thereby reducing the energy consumption demand in the subsequent evaporation process and enhancing the energy-saving effect.

[0017] Optionally, the cleaning system includes a rotary spray head, a high-pressure water pump, and a cleaning agent storage tank. The rotary spray head is powered by the high-pressure water pump, and the main delivery pipeline of the cleaning agent storage tank is connected to a corrosion-resistant pipeline via a three-way valve.

[0018] By adopting the above technical solution, the rotating spray head in the cleaning system, powered by a high-pressure water pump, performs high-pressure, multi-angle spray cleaning on the interior of each evaporator. Combined with the design of the cleaning agent storage tank connected to corrosion-resistant pipes via a three-way valve, the delivery and switching of the cleaning agent can be flexibly controlled. This ensures that the cleaning agent acts precisely and efficiently on the inner wall of the evaporator, effectively removing scale and residual impurities. It also allows for water rinsing when cleaning agent is not needed, preventing cleaning agent residue from affecting subsequent treatments. The powerful high-pressure spray improves cleaning effect and efficiency, reduces equipment downtime for cleaning, ensures the evaporator maintains good heat exchange performance, and maintains stable operation of the entire evaporation system.

[0019] Optionally, the cleaning agent storage tank includes an acid cleaning agent tank, a corrosion inhibitor tank, and a clean water tank, which are respectively connected to the main delivery pipeline via pipelines.

[0020] By adopting the above technical solution, the cleaning agent storage tank includes an acid cleaning agent tank, a corrosion inhibitor tank, and a clean water tank, which are connected to the main delivery pipeline through pipelines. Different media can be flexibly selected for cleaning operations according to the type of scaling on the evaporator and the cleaning requirements. The acid cleaning agent effectively dissolves hard scale formed by nickel salts, etc. The corrosion inhibitor can protect the metal surface of the evaporator from corrosion during the cleaning process and prevent the equipment from being damaged due to long-term cleaning. The clean water tank can be used for rinsing after using the cleaning agent to remove residual cleaning agent and impurities, ensuring thorough cleaning without affecting the subsequent wastewater treatment effect.

[0021] Optionally, the cleaning system also includes an ultrasonic generator, which is bolted to the bottom of each evaporator and electrically connected to a PLC controller.

[0022] By adopting the above technical solution, the ultrasonic generator in the cleaning system is fixed to the bottom of each evaporator with bolts and electrically connected to the PLC controller. Under the control of the PLC controller, the mechanical effect and cavitation effect generated by the high-frequency vibration of the ultrasonic waves work synergistically with the cleaning agent of the rotating spray to more deeply remove stubborn scale and fine impurities attached to the inner wall of the evaporator. Especially for dirt in dead corners and crevices that are difficult to reach by the spray, the cleaning effect and efficiency are significantly improved. At the same time, ultrasonic cleaning does not require high-intensity mechanical scraping, reducing damage to the inner wall of the evaporator. With the help of the PLC controller, automated timed cleaning is achieved, which further ensures the heat exchange performance and equipment integrity of the evaporator and ensures the long-term stable and efficient operation of the entire evaporation system.

[0023] Optionally, the human-machine interface module also includes a fault light, which is electrically connected to the PLC controller.

[0024] By adopting the above technical solution, the human-machine interaction module is equipped with a fault light and electrically connected to the PLC controller. The fault light can be lit immediately when the PLC controller detects any abnormality or fault in any part of the evaporation unit, and emit a conspicuous warning signal, so that the operator can quickly find and locate the problem, take timely countermeasures, avoid the fault from escalating or causing safety accidents, and improve the reliability and safety of the system.

[0025] Optionally, the intelligent control system also includes a temperature sensor, a pressure sensor, a liquid level sensor, and a concentration sensor, which are respectively installed in key parts of the multi-effect evaporation group, the cleaning system, and the resource recovery system.

[0026] By adopting the above technical solution, the temperature sensor, pressure sensor, liquid level sensor, and concentration sensor in the intelligent control system are installed in key parts of the multi-effect evaporation group, cleaning system, and resource recovery system, respectively. This enables comprehensive and real-time collection of operating parameters of each system's core components, such as temperature and pressure changes in the multi-effect evaporation group, liquid level of the cleaning agent in the cleaning system, and concentration of nickel salt solution in the resource recovery system. These precise parameter data provide a reliable basis for intelligent control, allowing the system to adjust the working status of each component in a timely manner according to actual operating conditions. For example, evaporation efficiency can be optimized through temperature and pressure data, and the cleaning rhythm and resource recovery process can be controlled based on liquid level and concentration information. This ensures that the entire system is always in a highly efficient and stable operating state, reduces errors from manual intervention, and improves the level of automation and operational reliability.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. Significantly improves the energy efficiency and economy of nickel plating wastewater treatment. Through the synergy of multi-effect evaporation unit, heat pump compressor, and waste heat recovery components, combined with real-time data collected by various sensors, intelligent control is achieved, greatly reducing energy consumption.

[0029] 2. To achieve efficient treatment and maximum resource recovery of nickel electroplating wastewater, the precise operation of the multi-effect evaporation group, together with the resin filter, precision filter and other components in the resource recovery system, can not only purify the condensate for reuse, but also effectively recover nickel resources in the concentrate, thereby improving the utilization rate of water resources and valuable metals.

[0030] 3. The intelligent control system's comprehensive monitoring and fault diagnosis functions, combined with the efficient cleaning function of the cleaning system, can always maintain a stable and reliable operating state. Each sensor provides real-time feedback of key parameters, and the fault diagnosis unit provides timely warnings of potential problems. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of an electroplating nickel wastewater recycling evaporation device according to the present invention;

[0032] Figure 2 This is a cross-sectional view of the cleaning agent storage tank of an electroplating nickel wastewater recycling evaporation device according to this utility model;

[0033] Figure 3 This is a cross-sectional view of the multi-effect evaporation group of an electroplating nickel wastewater recycling evaporation device according to the present invention.

[0034] The components include: 1. Energy-saving evaporation system; 10. Waste heat recovery component; 11. Multi-effect evaporation unit; 12. Heat pump compressor; 13. Plate heat exchanger; 2. Cleaning system; 20. Drain outlet; 21. Rotary spray head; 22. High-pressure water pump; 23. Cleaning agent storage tank; 230. Acidic cleaning agent tank; 231. Corrosion inhibitor tank; 232. Clean water tank; 24. Ultrasonic generator; 3. Resource recovery system; 30. Concentrate storage tank; 31. Resin filter; 32. Condenser; 33. Precision filter; 4. Intelligent control system; 40. PLC controller; 41. Human-machine interaction module; 410. Fault indicator; 42. Temperature sensor; 43. Pressure sensor; 44. Liquid level sensor; 45. Concentration sensor. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0036] This application discloses an evaporation device for recycling nickel plating wastewater.

[0037] Reference Figure 1The raw wastewater from nickel plating first enters the waste heat recovery component 10 of the energy-saving evaporation system 1 through a pipeline. It is preheated by the waste heat of steam discharged from the last effect evaporator of the multi-effect evaporation group 11. The preheated wastewater is then transported to the feed inlet of the multi-effect evaporation group 11 through the outlet pipeline. The evaporators in the multi-effect evaporation group 11 are arranged horizontally and connected by steam pipelines. The heat pump compressor 12 is bidirectionally connected to the multi-effect evaporation group 11 through a stainless steel steam pipeline, which provides energy for the evaporation process and realizes the recycling of steam, thereby improving evaporation efficiency while reducing energy consumption.

[0038] The cleaning system 2 is started periodically during equipment operation. The high-pressure water pump 22 draws the corresponding medium from the cleaning agent storage tank 23 and delivers it to the rotating spray head 21 on the top of each evaporator through the anti-corrosion pipeline. The inner wall of the evaporator is cleaned by high-pressure spray. The acidic cleaning agent, corrosion inhibitor and clean water in the cleaning agent storage tank 23 can be flexibly selected by switching through the pipeline. The impurities generated during cleaning are discharged into the wastewater pool through the drain outlet 20 at the bottom of the evaporator and the drain pipe. The ultrasonic generator 24 installed at the bottom of each evaporator works in conjunction with the spray cleaning under the control of the PLC controller 40. It uses high-frequency vibration to remove stubborn scale and fine impurities, ensuring that the inner wall of the evaporator is clean.

[0039] In the resource recycling system 3, the concentrate at the bottom of the last effect evaporator of the multi-effect evaporation group 11 flows into the concentrate storage tank 30 through a corrosion-resistant pipe, and then is treated by the resin filter 31 to recover the nickel resources therein. The condensate generated by the condenser 32 enters the precision filter 33 through a pipe, and the filtered water is reused through a recycling pipe.

[0040] The temperature sensor 42, pressure sensor 43, liquid level sensor 44, and concentration sensor 45 of the intelligent control system 4 monitor parameters such as the temperature and pressure of the multi-effect evaporation group 11, the liquid level of the cleaning agent in the cleaning system 2, and the concentration of the solution in the resource recovery system 3, respectively. The data is transmitted to the PLC controller 40 in real time. The PLC controller 40 analyzes and processes the data and realizes the real-time display and adjustment of parameters through the human-machine interaction module 41. When the system malfunctions, the fault light 410 of the human-machine interaction module 41 will light up in time to remind the operator to handle the problem, ensuring that the entire device continues to operate stably and efficiently completes the treatment and resource recovery of electroplating nickel wastewater.

[0041] Reference Figure 2The cleaning agent storage tank 23 contains an acid cleaning agent tank 230, a corrosion inhibitor tank 231, and a clean water tank 232, all of which are connected to the main delivery pipeline via independent pipes. A level sensor 44 is installed inside the tanks to monitor the liquid level of each medium in real time. When the cleaning system 2 is started, the PLC controller 40 selects the appropriate cleaning medium by controlling the switching of the three-way valve based on the evaporator scaling status fed back by the sensor. When removing nickel salt scale from the inner wall of the evaporator, the acid cleaning agent in the acid cleaning agent tank 230 enters the main delivery pipeline via a pipe, and under the action of the high-pressure water pump 22, is delivered through the anti-corrosion pipe to the rotating spray head 21 for targeted cleaning of the evaporator. To avoid... To prevent acid-free cleaning agents from corroding the metal surface of the evaporator, corrosion inhibitor tank 231 is opened simultaneously or alternately, allowing the corrosion inhibitor to enter the spray system along with the cleaning agent to form a protective coating. After cleaning, the system switches to clean water tank 232, and clean water is used to rinse the inside of the evaporator through the same path to thoroughly remove residual cleaning agent and loose impurities. The waste liquid generated during rinsing is discharged into the wastewater pool through drain outlet 20. Throughout the cleaning process, level sensor 44 transmits the level data of each tank to PLC controller 40 in real time to ensure a stable supply of cleaning medium. Human-machine interface module 41 displays the cleaning progress and related parameters in real time, facilitating monitoring and adjustment by operators, ensuring cleaning effectiveness while avoiding resource waste.

[0042] Reference Figure 3 In the multi-effect evaporation group 11, each effect evaporator is equipped with a rotating spray head 21 on its top, and temperature sensors 42 are also distributed on the top of each effect evaporator to monitor temperature changes in real time during the evaporation process. When the device is started, the multi-effect evaporation group 11 begins to evaporate the incoming pre-treated wastewater. Each effect evaporator operates sequentially, and the secondary steam generated in the previous effect is transported to the next effect through a steam pipe to continue participating in evaporation as a heating source, thereby improving energy utilization efficiency. During the evaporation process, the temperature sensors 42 continuously transmit the temperature data inside each effect evaporator to the PLC controller 40. When the temperature of a certain effect deviates from the preset range, the PLC controller 40 will adjust the relevant parameters in time to ensure the evaporation process is stable. When cleaning is required, the rotating spray head 21, driven by the high-pressure water pump 22, draws the appropriate cleaning medium from the cleaning agent storage tank 23 and sprays it all over the inner wall of the evaporator. Combined with the high-frequency vibration generated by the ultrasonic generator 24 at the bottom, it can effectively remove the attached scale. The waste liquid generated by cleaning is discharged through the drain port 20, ensuring that the evaporator always maintains a good heat exchange effect and ensuring that the entire multi-effect evaporation process is carried out efficiently and stably.

[0043] The implementation principle of the electroplating nickel wastewater recycling evaporation device in this application is as follows:

[0044] The efficient treatment, resource recovery, and energy-saving stable operation of nickel plating wastewater are achieved through the coordinated operation of various systems. The energy-saving evaporation system 1, as the core treatment unit, uses the waste heat recovery component 10 to preheat the incoming nickel plating wastewater. The wastewater is then evaporated using the multi-effect evaporation unit 11 and the heat pump compressor 12, fully utilizing the waste heat from the final effect steam to significantly reduce energy consumption. The cleaning system 2, through the synergistic action of the rotating spray head 21, the ultrasonic generator 24, and different cleaning agents, performs targeted cleaning of each effect evaporator in the multi-effect evaporation unit 11, promptly removing scale and discharging wastewater. Impurities are discharged through port 20 to ensure continuous and efficient heat exchange in the evaporator. Resource recovery system 3 treats the concentrate and condensate produced by evaporation separately. The concentrate is filtered through resin filter 31 to recover nickel resources, and the condensate is filtered through precision to achieve reuse, thereby improving resource utilization. Intelligent control system 4 collects parameters of each link in real time through various sensors. After analysis and processing by PLC controller 40, it realizes the automatic control of each system. Combined with the fault warning and other functions of human-machine interaction module 41, it ensures that the entire device completes the entire process of electroplating nickel wastewater treatment and resource recovery in an energy-saving and stable state.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An evaporation device for recycling nickel plating wastewater, characterized in that: It includes an energy-saving evaporation system (1), a cleaning system (2), a resource recycling system (3), and an intelligent control system (4); The energy-saving evaporation system (1) includes a waste heat recovery component (10), a multi-effect evaporation group (11) and a heat pump compressor (12). The multi-effect evaporation group (11) is installed on the left side of the heat pump compressor (12) and connected bidirectionally by a stainless steel steam pipe. The waste heat recovery component (10) and the heat pump compressor (12) are installed on the same side. Its heat medium inlet is connected to the steam outlet of the last effect evaporator of the multi-effect evaporation group (11), its cold medium inlet is connected to the electroplating nickel wastewater pipe, and its outlet pipe is connected to the feed port of the multi-effect evaporation group (11). The cleaning system (2) is located on the left side of the multi-effect evaporation group (11) and is connected to the rotating spray head (21) on the top of each effect evaporator through an anti-corrosion pipe. Each effect evaporator is also provided with a drain outlet (20) at the bottom, and the drain outlet (20) is connected to the wastewater pool through a drain pipe. The resource recycling system (3) is installed below the multi-effect evaporation group (11) and includes a concentrate storage tank (30), a resin filter (31), a condenser (32) and a precision filter (33). The concentrate storage tank (30) is connected to the bottom of the last effect evaporator of the multi-effect evaporation group (11) through a corrosion-resistant pipe. The inlet of the resin filter (31) is connected to the outlet of the concentrate storage tank (30). The condensate outlet of the condenser (32) is connected to the precision filter (33) through a pipe. The intelligent control system (4) includes a PLC controller (40) and a human-machine interaction module (41), which are installed on the lower left side of the multi-effect evaporation group (11).

2. The electroplating nickel wastewater recycling evaporation device according to claim 1, characterized in that: In the multi-effect evaporation group (11), each effect evaporator is arranged horizontally and connected by a steam pipe.

3. The electroplating nickel wastewater recycling evaporation device according to claim 1, characterized in that: The energy-saving evaporation system (1) also includes a plate heat exchanger (13), which is connected to the waste heat recovery component (10) via a pipeline.

4. The electroplating nickel wastewater recycling evaporation device according to claim 1, characterized in that: The cleaning system (2) includes a rotary spray head (21), a high-pressure water pump (22), and a cleaning agent storage tank (23). The rotary spray head (21) is powered by the high-pressure water pump (22), and the main delivery pipeline of the cleaning agent storage tank (23) is connected to an anti-corrosion pipeline through a three-way valve.

5. The electroplating nickel wastewater recycling evaporation device according to claim 4, characterized in that: The cleaning agent storage tank (23) includes an acid cleaning agent tank (230), a corrosion inhibitor tank (231), and a clean water tank (232), which are respectively connected to the main delivery pipeline through pipelines.

6. The electroplating nickel wastewater recycling evaporation device according to claim 1, characterized in that: The cleaning system (2) also includes an ultrasonic generator (24), which is fixed to the bottom of each evaporator by bolts and is electrically connected to a PLC controller.

7. The electroplating nickel wastewater recycling evaporation device according to claim 1, characterized in that: The human-machine interaction module (41) also includes a fault light (410), which is electrically connected to the PLC controller (40).

8. The electroplating nickel wastewater recycling evaporation device according to claim 1, characterized in that: The intelligent control system (4) also includes a temperature sensor (42), a pressure sensor (43), a liquid level sensor (44), and a concentration sensor (45), which are installed in key parts of the multi-effect evaporation group (11), the cleaning system (2), and the resource recovery system (3), respectively.

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