An energy-saving precision mixing acid unit with automatic control

Abstract

The present invention relates to the technical field of water treatment, and particularly to an energy-saving precision mixing acidic unit with automatic control, which includes a filtration chamber, an imaging device, a mixed bed, a lifting device, a pure water detection device, a flowmeter, a flow rate control valve, and a data analysis module. The data analysis module determines whether to replace the filter screen according to the area of agglomerated blockages; determines whether to replace the ion exchange resin in the mixed bed according to the comparison result of the initial heavy metal content; adjusts the opening angle or lifting height of the lifting device according to the comparison result of the first pure water flow rate; determines whether to adjust the initial stirring period according to the comparison result of the second pure water flow rate to obtain a target stirring period; and a central control module, which controls the lifting device to adjust the opening area, lifting height, and rotation speed according to the instruction output by the data analysis module, or adjusts the opening degree of the flow rate control valve. The present invention makes full use of the ion exchange resin by precisely adjusting the flow rate of acidic wastewater and the stirring method.

Description

Technical Field

[0001] The invention relates to the technical field of water treatment, and in particular to an automatically controlled energy-saving fine mixing acid unit. Background Art

[0002] Enterprises will produce a large amount of acidic wastewater during the production process. The present invention is used to treat condensate in the chemical, electric power, petroleum and other industries. The main purpose is to remove suspended matter, colloids, corrosion products and oils in the condensate to ensure that the water quality meets the requirements of the supercritical parameter unit. It is necessary to adjust the operating parameters according to the water quality and equipment status to ensure that the water quality meets the standard. The operation and maintenance of the equipment are crucial to ensure the stable operation of the boiler in the power system. Mixed acidic wastewater is generally treated by lime neutralization. The neutralized wastewater is a kind of wastewater with high nitrate nitrogen content. The direct discharge of total nitrogen is very high, which is 20 to 100 times the national emission standard. Therefore, a few domestic stainless steel companies such as Zhangjiagang Posco and Guangzhou Lianzhong have added biological denitrification treatment of stainless steel pickling wastewater after neutralization, and the total nitrogen in the wastewater is removed and then reused or directly discharged into the water body. Due to the high operating cost of biological denitrification, most domestic stainless steel companies still directly discharge the wastewater of the stainless steel pickling unit into the drainage network of the whole plant after neutralization, resulting in excessive total nitrogen in the production wastewater discharged from the whole plant.

[0003] Chinese Patent Publication No.: CN112978820A discloses an acidic wastewater treatment device including a treatment box, a water inlet pipe and a water outlet pipe are arranged on the side surface of the treatment box, the water inlet pipe and the water outlet pipe are respectively located on the side surface of the treatment box and arranged opposite to each other, and the water inlet pipe and the water outlet pipe are both connected to the inside of the treatment box, a driving device is arranged in the treatment box, the driving device includes a main rotating shaft, threaded columns are fixedly installed at both upper and lower ends of the main rotating shaft, a stirring and separating device is arranged on the side surface of the main rotating shaft, the number of the stirring and separating devices is two, the stirring and separating device includes stirring plates, the two stirring plates are respectively located on the side surface of the main rotating shaft and are symmetrically arranged, and each stirring plate is provided with an auxiliary device in the same manner.

[0004] It can be seen that the prior art has the following problems: in the process of treating acidic wastewater, the ion exchange resin cannot be fully utilized due to unreasonable adjustment of the flow rate of the acidic wastewater and unreasonable stirring method. Summary of the invention

[0005] To this end, the present invention provides an automatically controlled energy-saving fine mixing acid unit to overcome the problem in the prior art that the ion exchange resin cannot be fully utilized due to unreasonable adjustment of the acid wastewater flow rate and stirring method.

[0006] To achieve the above object, the present invention provides an energy-saving acid mixing unit with automatic control, comprising:

[0007] A filtration tank, which is arranged at the first stage of the refined mixed acid unit and is used for filtering acidic wastewater to obtain initial acidic wastewater, and is internally provided with multiple layers of filter meshes;

[0008] A grasping device, which is arranged in the filtration tank and is used for removing agglomerated blockages;

[0009] An imaging device, which is arranged at the upper part of the filtration tank and is used for photographing agglomerated blockages;

[0010] A mixed bed, which is connected to the filtration tank through a first pipeline and is used for purifying the initial acidic wastewater;

[0011] A saturated resin recovery tank, which is connected to the upper part of the mixed bed and is used for recovering saturated resin. The saturated resin is the resin in which the ion exchange resin reaches a saturated state after absorbing pollutants during the process of filtering acidic wastewater;

[0012] A lifting device, which is arranged at the bottom of the mixed bed and can move up and down in the mixed bed, including lifting struts, a filter mesh sieve, a sliding sleeve and several brackets connected to the sliding sleeve. Among them, the filter mesh sieve is connected to the sliding sleeve through the brackets, and the lifting struts are slidably connected to the sliding sleeve;

[0013] A pure water detection device, which is arranged at the drainage port of the mixed bed and is used for detecting the heavy metal content of pure water;

[0014] A flowmeter, which is arranged at the drainage port of the mixed bed and is used for detecting the flow rate of pure water;

[0015] A flow rate control valve, which is arranged at the drainage port of the filtration tank and is used for controlling the flow rate of acidic wastewater entering the mixed bed;

[0016] A data analysis module, which is connected to the pure water detection device, the imaging device and the flowmeter. It judges whether to replace the filter mesh according to the area of agglomerated blockages; judges whether to replace the ion exchange resin in the mixed bed according to the comparison result of the initial heavy metal content; adjusts the opening angle or lifting height of the lifting device according to the first pure water flow rate comparison result; judges whether to adjust the initial stirring period according to the second pure water flow rate comparison result to obtain a target stirring period;

[0017] A central control module, which is connected to the lifting device and the flow control valve, and is used for controlling the lifting device to adjust the opening area, lifting height and rotation speed, or adjusting the opening degree of the flow control valve according to the instructions output by the data analysis module;

[0018] Among them, the first pure water flow rate comparison result is based on the first detection period, the flow meter detects the pure water flow rate to obtain the actual pure water flow rate, and the data analysis module compares the actual pure water flow rate and the preset pure water standard flow rate range; the second pure water flow rate comparison result is that after controlling the lifting strut to rotate at the initial rotation speed to change the distribution state of the ion exchange resin, the flow meter monitors the actual pure water flow rate to obtain the second pure water flow rate, and compares the second pure water flow rate with the minimum value of the pure water standard flow rate range.

[0019] Further, the pure water detection device detects the heavy metal content in pure water at the initial detection period to obtain the initial heavy metal content of pure water. The data analysis module compares the initial heavy metal content of pure water with the target heavy metal content range of pure water to obtain the initial heavy metal content comparison result, and judges whether to replace the ion exchange resin in the mixed bed according to the initial heavy metal content comparison result.

[0020] Further, for the case of replacing the ion exchange resin, the central control module adjusts the initial detection period according to the purification duration to obtain the first detection period;

[0021] Among them, the purification duration is the duration from the first purification of the mixed bed to the replacement of the ion exchange resin.

[0022] Further, based on the first detection period, the flow meter detects the pure water flow rate to obtain the actual pure water flow rate. The data analysis module compares the actual pure water flow rate and the preset pure water standard flow rate range to obtain the first pure water flow rate comparison result. The data analysis module adjusts the opening angle or lifting height of the lifting device according to the first pure water flow rate comparison result.

[0023] Further, for the case where adjusting the opening angle and lifting height of the lifting device cannot satisfy the actual pure water flow rate within the pure water standard flow rate range, the control module controls the lifting device to rotate at the initial rotation speed or replace the ion exchange resin.

[0024] Further, for the case of not replacing the ion exchange resin, the data analysis module adjusts the initial opening degree of the flow rate control valve according to the absolute value of the difference between the initial heavy metal content of pure water detected by the pure water detection device and the target heavy metal content of pure water to obtain the target opening degree of the flow rate control valve.

[0025] Further, for the case of increasing the flow rate of acidic wastewater, the central control module controls the flow meter to detect the pure water flow rate at the drainage outlet of the mixed bed to obtain the first actual pure water flow rate. The data analysis unit compares the first actual pure water flow rate with the preset pure water standard flow rate range to obtain the second pure water flow rate comparison result.

[0026] Further, the data analysis module determines whether to adjust the initial stirring period according to the comparison result of the second pure water flow rate to obtain a target stirring period;

[0027] Wherein, the initial stirring period is determined according to the duration from the initial moment of the mixed bed for purifying acidic wastewater to the moment when the heavy metal content in the pure water is greater than the target heavy metal content range.

[0028] Further, multiple layers of filter meshes are arranged in the filtration bin, and the data processing module determines whether to replace the filter mesh according to the area of the filter mesh covered by the blockage.

[0029] Further, for the case of blockage accumulation, the central control module controls the grasping device to remove the agglomerated blockage deposited on the filter mesh.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows: By setting up a filtration bin and multiple layers of filter meshes, solid particles in acidic wastewater can be effectively filtered, reducing the burden on subsequent treatment devices and improving the overall wastewater treatment efficiency. The setting of the grasping device enables the automatic removal of agglomerated blockages in the filtration bin, reducing the workload of manual cleaning and improving the automation degree of the equipment. The use of the imaging device enables operators to observe the situation of agglomerated blockages in real time, helping to promptly discover problems and conduct processing. The use of the mixed bed can effectively purify the initial acidic wastewater, remove pollutants such as heavy metals, and improve the effluent water quality. The design of the saturated resin recovery bin enables the recovery of saturated resin, which can be recycled and reused, reducing the operating cost. The setting of the lifting device enables the purification effect in the mixed bed to be adjusted as needed. The combined use of the pure water detection device and the flowmeter can accurately control the water quality and flow rate. The combination of the data analysis module and the central control module realizes the automatic adjustment of equipment operation parameters according to real-time data, improving the intelligent management level of the system. Through the monitoring and analysis of various parameters by the data analysis module, the replacement period of the filter mesh, the replacement timing of the ion exchange resin, and the stirring period can be optimized, thereby reducing the operating cost. The setting of the flow rate control valve ensures the stable flow rate of the acidic wastewater entering the mixed bed, improving the stability and reliability of the entire system.

[0031] Furthermore, the central control module can automatically execute corresponding control instructions according to the detection results, reducing manual intervention and improving the automation level of the system. By regularly detecting the heavy metal concentration in pure water and timely replacing the ion exchange resin, it ensures that the water quality output by the precision mixing acid unit meets the target pure water heavy metal content range, guaranteeing the final water use safety. Resin replacement is only carried out when the initial heavy metal content in pure water exceeds the target range, avoiding unnecessary resin replacement, extending the service life of the resin, and reducing the operating cost. By precisely controlling the resin replacement process, the downtime of the system is reduced and the production efficiency is improved. By recycling and regenerating the saturated resin, the generation of waste is reduced, realizing the circular utilization of resources and meeting the environmental protection requirements.

[0032] Furthermore, by recording the purification duration and adjusting the first detection cycle accordingly, it can ensure timely detection when the resin is approaching saturation, thus avoiding the risk of excessive heavy metal content. Determining the detection cycle based on the actual purification duration can more accurately predict the saturation time of the resin, reduce unnecessary resin replacement, and extend the service life of the resin. By optimizing the detection cycle, unnecessary detections and resin replacements are reduced, and the operating cost is lowered. The automated adjustment of the detection cycle improves the adaptive ability of the precision mixing acid unit, ensuring the stable operation and water quality safety of the precision mixing acid unit. Reducing the resin replacement frequency means reducing the amount of waste resin to be processed, having a positive impact on the environment. Since the first detection cycle is positively correlated with the purification duration, the pure water detection device can conduct timely detection when the resin saturation reaches a certain level to ensure water quality. A reasonable detection cycle reduces resource waste and improves economic benefits. The adaptive adjustment of the precision mixing acid unit improves the overall operation reliability and reduces the possibility of human errors.

[0033] Furthermore, for the case where the comparison result of the first pure water flow rate shows that the first pure water flow rate is greater than the maximum value of the standard flow rate range, the central control module controls the lifting device to open the filter screen, which can slow down the purification and thus slow down the pure water flow rate to protect the mixed bed equipment. For the case where the comparison result of the first pure water flow rate shows that the first pure water flow rate is less than the minimum value of the standard flow rate range, the central control module controls the lifting device to raise the lifting strut to obtain the lifting height of the first lifting strut, and controls the lifting device to open the filter screen to obtain the opening area of the second filter screen. It can change the original precipitation state of the ion exchange resin by the lifting of the lifting device, increase the gaps between the ion exchange resins, and enhance the purification capacity. By adjusting the lifting device, the actual pure water flow rate is ensured to be maintained within the preset pure water standard flow rate range, thereby ensuring the stability of the process flow and the product quality. Through automatic control, manual intervention is reduced, production efficiency is improved, and operating costs are lowered. Precise adjustment is carried out according to the actual readings of the flow meter to ensure that the flow rate is within the allowable error range. Real-time monitoring and rapid response can adjust the flow rate in a timely manner to avoid production interruptions caused by flow rate fluctuations. By avoiding damage to the equipment caused by excessive or too small flow rates, the service life of the mixed bed and other related equipment can be extended. Production efficiency decline or water quality problems caused by flow rate fluctuations are avoided.

[0034] Furthermore, by adjusting the opening angle and lifting height of the lifting device, it is possible to automatically attempt to increase the flow rate, reduce manual intervention, and improve the operation efficiency. When adjusting the opening angle and lifting height is ineffective, the control module changes the distribution state of the ion exchange resin by rotating the lifting device, which helps to improve the distribution condition of the ion exchange resin and thus increase the flow rate. The data analysis module continuously monitors the actual pure water flow rate through the flow meter and compares it with the standard flow rate range, ensuring the real-time feedback and self-adjustment ability of the fine mixing acid unit. If the comparison result of the second pure water flow rate shows that the flow rate has returned to the standard flow rate range after rotating the lifting device, the central control module will not perform resin replacement, thus avoiding unnecessary costs and downtime. If the flow rate still cannot reach the standard after rotation adjustment, the central control module will trigger the resin replacement program to ensure that the fine mixing acid unit can continuously provide pure water flow rate meeting the standard. Avoiding unnecessary ion exchange resin replacement can extend the service life of the resin. The fine mixing acid unit can automatically select the most suitable adjustment measure according to the actual situation, improving the flexibility of the operation.

[0035] Furthermore, by real-time monitoring and dynamically adjusting the flow rate of acidic wastewater, the ion exchange resin can be utilized more effectively, improving the efficiency of heavy metal removal. This can ensure that the heavy metal content in the output pure water is stably within the safety standard range, safeguarding the health of end-users. By precisely controlling the flow rate of acidic wastewater, unnecessary over-treatment can be avoided, saving the usage of ion exchange resin and the consumption of chemical reagents. Reasonable control of the flow rate helps reduce the wear of the resin and extend its service life. The automated system reduces the need for manual intervention and lowers the risk of operation errors. The real-time monitoring of the pure water detection device and the rapid feedback mechanism of the data analysis module enable the precision mixing acidic unit to promptly respond to water quality changes and maintain the stability of the treatment effect. The automatic adjustment process reduces the manual intervention of operators and improves the automation level. By reasonably adjusting the flow rate, the usage of acidic wastewater is optimized, reducing unnecessary consumption. Ensuring that the heavy metal content of the pure water meets the target standard improves the quality of the final product. By making the absolute value of the difference between the initial heavy metal content and the minimum value of the target heavy metal content of pure water positively correlated with the target opening of the flow rate control valve, the heavy metal content of the pure water is guaranteed to meet the standard while ensuring the purification efficiency.

[0036] Furthermore, by real-time monitoring the actual flow rate of pure water and comparing it with the standard flow rate range, the precision mixing acidic unit can adjust the stirring cycle according to the result of the second pure water flow rate comparison, thereby optimizing the purification efficiency of the mixed bed and ensuring that the heavy metal content meets the standard. The data analysis module precisely adjusts the stirring cycle based on the flow rate difference, contributing to more refined operation control and improving the automation level of the system. By shortening the stirring cycle, energy consumption and equipment wear can be reduced while ensuring the treatment effect, lowering the operating cost. Maintaining the matching of the stirring cycle and the flow rate helps to maintain the stable operation of the mixed bed and reduce water quality instability problems caused by flow rate fluctuations. The precision mixing acidic unit can automatically adjust the stirring cycle according to different flow rate situations to adapt to different treatment requirements and operating conditions. By shortening the stirring cycle, the precision mixing acidic unit can respond more quickly to the situation of insufficient actual flow rate of the first pure water, improving the treatment speed and ensuring the heavy metal removal effect. Fine-tuning the stirring cycle helps to maintain the optimal operating state of the system, ensuring water quality while avoiding over-treatment. When the actual flow rate of the first pure water exceeds the expectation, keeping the stirring cycle unchanged can ensure that the system will not reduce the treatment effect due to the too-fast flow rate.

[0037] Furthermore, by setting up multiple filter nets with different pore sizes, solid particles of different sizes can be effectively intercepted, improving the overall filtration efficiency and ensuring that the outflow water quality meets the standards. By periodically monitoring the coverage area of the blockage and removing it in a timely manner, over-blockage of the filter net can be prevented, extending its service life. The combined use of the imaging device and the data processing module enables automatic monitoring and evaluation of the blockage situation of the filter net, reducing manual intervention and improving the automation level. The central control module controls the grasping device to automatically remove the blockage, which can maintain the normal operation of the filtration chamber without stopping the machine, reducing the downtime caused by replacing the filter net. By comparing the preset threshold with the actual flow rate, it is possible to accurately determine when the filter net needs to be replaced, making the maintenance operation more precise and efficient. Timely removal of the blockage and replacement of the filter net can effectively prevent the decline of the filtration effect and ensure the water quality safety of the final effluent. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 FIG. is a schematic structural diagram of an energy-saving precision mixing acidic unit with automatic control in this embodiment;

[0039] Figure 2 FIG. is a schematic structural diagram of a lifting device of an energy-saving precision mixing acidic unit with automatic control in this embodiment;

[0040] Figure 3 FIG. is a flow chart of the determination process for replacing ion exchange resin of an energy-saving precision mixing acidic unit with automatic control in this embodiment;

[0041] Figure 4 FIG. is a flow chart of the adjustment process of a lifting device of an energy-saving precision mixing acidic unit with automatic control in this embodiment.

[0042] In the figures, 1 - filtration chamber; 2 - filter net; 3 - flow meter; 4 - grasping device; 5 - imaging device; 6 - mixed bed; 7 - first pipeline; 8 - saturated resin recovery bin; 9 - blocking net; 10 - pure water storage bin; 11 - flow meter; 12 - flow rate control valve; 13 - pure water detection device; 14 - lifting device; 1401 - lifting support rod; 1402 - filter net sieve; 1403 - sliding sleeve; 1404 - bracket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0043] In order to make the objectives and advantages of the present invention clearer, the present invention will be further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0044] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and do not limit the protection scope of the present invention.

[0045] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0046] In addition, it should also be noted that in the description of the present invention, unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] Please refer to Figures 1 - 4 as shown in Figure 1 the structural schematic diagram of the energy-saving precision mixing acidic unit with automatic control in this embodiment; Figure 2 the structural schematic diagram of the lifting device of the energy-saving precision mixing acidic unit with automatic control in this embodiment; Figure 3 the flow chart of the determination process for replacing the ion exchange resin of the energy-saving precision mixing acidic unit with automatic control in this embodiment; Figure 4 the flow chart of the adjustment process of the lifting device of the energy-saving precision mixing acidic unit with automatic control in this embodiment.

[0048] This embodiment provides an energy-saving precision mixing acidic unit with automatic control, including

[0049] a filtration bin 1, which is arranged at the first stage of the precision mixing acidic unit and is used for filtering acidic wastewater to obtain initial acidic wastewater, and is internally provided with multiple layers of filter meshes 2 and a flowmeter 3;

[0050] a grasping device 4, which is arranged in the filtration bin and is used for removing agglomerated blockages;

[0051] an imaging device 5, which is arranged above the filtration bin and is used for photographing agglomerated blockages;

[0052] a mixed bed 6, which is connected to the filtration bin through a first pipeline 7 and is used for purifying the initial acidic wastewater;

[0053] a saturated resin recovery bin 8, which is connected to the upper part of the mixed bed and is used for recovering saturated resin. The saturated resin is the resin in which the ion exchange resin absorbs pollutants to reach a saturated state during the process of filtering acidic wastewater;

[0054] The blocking net 9 is arranged above the mixed bed and is used to block the ion exchange resin and agglomerates;

[0055] The lifting device 14 is arranged at the bottom of the mixed bed and can move up and down in the mixed bed. It includes lifting struts 1401, lifting struts 1402, lifting struts 1403 and several brackets 1404 connected to the sliding sleeve. Among them, the filter screen is connected to the sliding sleeve through the brackets, and the lifting struts are slidably connected to the sliding sleeve;

[0056] The pure water storage bin 10 is connected to the mixed bed and is used to store the qualified pure water that meets the purification standard. Among them, the qualified pure water is the water after the acidic wastewater reaches the purification standard;

[0057] The pure water detection device 13 is arranged at the drainage port of the mixed bed and is used to detect the heavy metal content of the pure water;

[0058] The flowmeter 11 is arranged at the drainage port of the mixed bed and is used to detect the flow rate of the pure water;

[0059] The flow rate control valve 12 is arranged at the drainage port of the filter bin and is used to control the flow rate of the acidic wastewater entering the mixed bed;

[0060] The data analysis module is connected to the pure water detection device, the imaging device and the flowmeter. It judges whether to replace the filter screen according to the area of the agglomeration blockage; judges whether to replace the ion exchange resin in the mixed bed according to the comparison result of the initial heavy metal content; adjusts the opening angle or lifting height of the lifting device according to the first pure water flow rate comparison result; judges whether to adjust the initial stirring period according to the second pure water flow rate comparison result to obtain the target stirring period;

[0061] The central control module is connected to the lifting device and the flow control valve and is used to control the lifting device to adjust the opening area, lifting height and rotation speed, or adjust the opening degree of the flow control valve according to the instruction output by the data analysis module.

[0062] By setting up a filter bin and a multi-layer filter, solid particles in acidic wastewater can be effectively filtered, reducing the burden of subsequent treatment devices and improving the overall wastewater treatment efficiency. The setting of the grabbing device enables the agglomeration blockage in the filter bin to be automatically removed, reducing the workload of manual cleaning and improving the automation of the equipment. The use of the imaging device enables the operator to observe the situation of the agglomeration blockage in real time, which helps to find problems and deal with them in time. The use of the mixed bed can effectively purify the initial acidic wastewater, remove pollutants such as heavy metals, and improve the water quality of the effluent. The design of the saturated resin recovery bin allows the saturated resin to be recovered and reused, reducing operating costs. The setting of the lifting device allows the purification effect in the mixed bed to be adjusted as needed, and the use of the pure water detection device and the flow meter can accurately control the water quality and flow. The combination of the data analysis module and the central control module realizes the automatic adjustment of the equipment operation parameters according to the real-time data, and improves the intelligent management level of the system. Through the monitoring and analysis of various parameters by the data analysis module, the replacement cycle of the filter, the replacement time of the ion exchange resin and the stirring cycle can be optimized, thereby reducing the operating cost. The setting of the flow rate control valve ensures the stability of the flow rate of the acidic wastewater entering the mixed bed, thereby improving the stability and reliability of the entire system.

[0063] Specifically, the pure water detection device detects the heavy metal content in the pure water in an initial detection cycle to obtain the initial pure water heavy metal content. The data analysis module compares the initial pure water heavy metal content with the target pure water heavy metal content range to obtain an initial heavy metal content comparison result, and determines whether to replace the ion exchange resin in the mixed bed based on the initial heavy metal content comparison result.

[0064] At the beginning of each test cycle, the pure water testing device analyzes the heavy metal content of the pure water.

[0065] The data analysis module receives the initial pure water heavy metal content data and compares the initial pure water heavy metal content with the target pure water heavy metal content range.

[0066] If the initial heavy metal content comparison result shows that the initial pure water heavy metal content is greater than the maximum value of the target pure water heavy metal content range, the central control module controls the fine mixing acid unit to shut down, and controls the sliding sleeve to rise and fix along the lifting support rod to open the filter screen, the lifting support rod moves upward to push the saturated resin into the saturated resin recovery bin to clean the mixed bed, and the resin regeneration bin introduces the regenerated ion exchange resin into the mixed bed, wherein the area of ​​the filter screen after opening is smaller than the bottom area of ​​the mixed bed;

[0067] If the initial heavy metal content comparison result shows that the initial pure water heavy metal content is within the target pure water heavy metal content range, the control module does not issue a control instruction;

[0068] For the case where the comparison result of the initial heavy metal content shows that the heavy metal content in the initial pure water is less than the minimum value of the target pure water heavy metal content range, the control module controls the flow rate control valve to increase the opening degree;

[0069] Restart the fine mixing acidic unit and conduct tests to ensure that the water quality meets the standards.

[0070] Preferably, the target pure water heavy metal content range is 0.01 - 0.05 mg / L, and the heavy metals include but are not limited to cadmium, chromium, copper, lead, mercury, nickel, silver, gold, zinc, etc., and no specific limitations are made in this embodiment.

[0071] The central control module can automatically execute corresponding control instructions according to the detection results, reducing manual intervention and improving the automation degree of the system. By regularly detecting the heavy metal concentration in pure water and timely replacing the ion exchange resin, it ensures that the water quality output by the fine mixing acidic unit meets the target pure water heavy metal content range, guaranteeing the final water use safety. The resin is only replaced when the initial pure water heavy metal content exceeds the target range, avoiding unnecessary resin replacement, extending the service life of the resin, and reducing the operating cost. By precisely controlling the resin replacement process, the downtime of the system is reduced, and the production efficiency is improved. By recycling and regenerating the saturated resin, the generation of waste is reduced, realizing the recycling of resources and meeting the environmental protection requirements.

[0072] Specifically, for the case of replacing the ion exchange resin, the central control module adjusts the initial detection period according to the purification duration to obtain the first detection period;

[0073] Wherein, the purification duration is the duration from the initial purification of the mixed bed to the replacement of the ion exchange resin.

[0074] The pure water detection device records the time from the moment when the pure water starts to be purified to the moment when the heavy metal content in the pure water is greater than the maximum value of the target pure water heavy metal content range, that is, the purification duration.

[0075] Determine the first detection period through the purification duration. During the detection process, adjust the detection period to make the detected heavy metal content more timely, and determine the first detection period according to the purification duration;

[0076] Wherein, the first detection period is positively correlated with the purification duration, and the positive correlation ratio between the first detection period and the purification duration is determined by a preset ratio influence compensation parameter; the initial detection period is determined according to the duration required for the ion exchange resin to reach the preset saturation.

[0077] By recording the purification duration and adjusting the first detection period accordingly, it is possible to ensure timely detection when the resin is approaching saturation, thus avoiding the risk of excessive heavy metal content. Determining the detection period based on the actual purification duration can more accurately predict the saturation time of the resin, reduce unnecessary resin replacement, and extend the service life of the resin. By optimizing the detection period, unnecessary detections and resin replacements are reduced, and the operating cost is lowered. The automated adjustment of the detection period improves the adaptive ability of the precision mixing and acidification unit, ensuring the stable operation of the precision mixing and acidification unit and water quality safety. Reducing the resin replacement frequency means reducing the amount of waste resin to be processed, having a positive impact on the environment. Since the first detection period is positively correlated with the purification duration, the pure water detection device can conduct timely detection when the resin saturation reaches a certain level to ensure water quality. A reasonable detection period reduces resource waste and improves economic efficiency. The adaptive adjustment of the precision mixing and acidification unit improves the overall operation reliability and reduces the possibility of human error.

[0078] Specifically, based on the first detection period, the flowmeter detects the pure water flow rate to obtain the actual pure water flow rate. The data analysis module compares the actual pure water flow rate with a preset pure water standard flow rate range to obtain a first pure water flow rate comparison result. The data analysis module adjusts the opening angle or lifting height of the lifting device according to the first pure water flow rate comparison result.

[0079] The flowmeter is arranged at the drainage outlet of the mixed bed for real-time detection of the pure water flow rate. The data analysis module presets a pure water standard flow rate range.

[0080] During the first detection period, the flowmeter starts to detect the actual pure water flow rate and transmits the data to the data analysis module in real time. The data analysis module receives the data of the actual pure water flow rate and compares it with the preset pure water standard flow rate range to obtain a first pure water flow rate comparison result.

[0081] For the case where the first pure water flow rate comparison result is that the first pure water flow rate is greater than the maximum value of the standard flow rate range, the central control module controls the lifting device to open the filter screen to obtain a first filter screen opening area. Among them, the difference between the first pure water flow rate and the maximum value of the standard flow rate range determines the first filter screen opening area, and the first filter screen opening area is positively correlated with the difference between the first pure water flow rate and the maximum value of the standard flow rate range.

[0082] For the case where the first pure water flow rate comparison result is that the first pure water flow rate is within the standard flow rate range, the central control module does not control the lifting device.

[0083] For the case where the comparison result of the first pure water flow rate shows that the first pure water flow rate is less than the minimum value of the standard flow rate range, the central control module controls the lifting device to raise the lifting strut to obtain the lifting height of the first lifting strut, and controls the lifting device to open the filter screen to obtain the opening area of the second filter screen. Among them, the difference between the minimum value of the standard flow rate range and the first pure water flow rate determines the opening area of the first filter screen, and the opening area of the second filter screen is positively correlated with the difference between the minimum value of the standard flow rate range and the first pure water flow rate; the lifting height of the first lifting strut is positively correlated with the difference between the minimum value of the standard flow rate range and the first pure water flow rate;

[0084] For example, the pure water standard flow rate range is 100 - 150 liters per minute, and the actual pure water flow rate detected by the flow meter is 90 liters per minute, which is lower than the lower limit of the preset pure water standard flow rate range.

[0085] After receiving this data, the data analysis module determines that it is necessary to raise the lifting strut and open the filter screen.

[0086] The central control module controls the lifting device to open the filter screen to 120° and raises it by 1.5 meters. The flow meter monitors the adjusted pure water flow rate until it reaches the standard flow rate range.

[0087] Among them, the pure water standard flow rate range is determined according to historical data and the acid wastewater treatment capacity of the equipment.

[0088] For the case where the comparison result of the first pure water flow rate shows that the first pure water flow rate is greater than the maximum value of the standard flow rate range, the central control module controls the lifting device to open the filter screen, which can slow down the purification and thus reduce the purified water flow rate to protect the mixed bed equipment. For the case where the comparison result of the first pure water flow rate shows that the first pure water flow rate is less than the minimum value of the standard flow rate range, the central control module controls the lifting device to raise the lifting strut to obtain the lifting height of the first lifting strut, and controls the lifting device to open the filter screen to obtain the opening area of the second filter screen. It can change the original precipitation state of the ion exchange resin by lifting the lifting device, increase the gaps between the ion exchange resins, and enhance the purification ability. By adjusting the lifting device, the actual pure water flow rate is ensured to be maintained within the preset pure water standard flow rate range, thereby ensuring the stability of the process flow and product quality. Through automatic control, manual intervention is reduced, production efficiency is improved, and operation costs are lowered. Precise adjustment is carried out according to the actual readings of the flow meter to ensure that the flow rate is within the allowable error range. Real-time monitoring and rapid response can adjust the flow rate in a timely manner to avoid production interruptions caused by flow rate fluctuations. By avoiding damage to the equipment caused by excessive or too small flow rates, the service life of the mixed bed and other related equipment can be extended. It avoids production efficiency decline or water quality problems caused by flow rate fluctuations.

[0089] Specifically, for the case where adjusting the opening angle and lifting height of the lifting device cannot meet the actual pure water flow rate within the pure water standard flow rate range, the control module controls the lifting device to rotate at the initial rotation speed or replace the ion exchange resin.

[0090] The data analysis module detects through the flowmeter that the actual pure water flow rate is still lower than the minimum value of the preset pure water standard flow rate range

[0091] For example, the flowmeter shows a flow rate of 800 liters per minute, while the standard flow rate range is 100 - 150 liters per minute.

[0092] The central control module adjusts the opening angle and lifting height of the lifting device to increase the flow rate. However, if these adjustments are ineffective, the central control module will control the lifting strut to start rotating at the initial rotation speed, which is preset according to the mixed bed parameters, to change the distribution state of the ion exchange resin. The flowmeter continues to monitor the actual pure water flow rate to obtain the second pure water flow rate. The data analysis module compares the second pure water flow rate with the minimum value of the pure water standard flow rate range to obtain the second pure water flow rate comparison result.

[0093] For the case where the second pure water flow rate comparison result shows that the second pure water flow rate is within the pure water standard flow rate range, the central control module does not replace the ion exchange resin in the mixed bed and maintains the current rotation state;

[0094] For the case where the second pure water flow rate comparison result shows that the second pure water flow rate is less than the minimum value of the pure water standard flow rate range, the central control module replaces the ion exchange resin.

[0095] By adjusting the opening angle and lifting height of the lifting device, it is possible to automatically attempt to increase the flow rate, reducing manual intervention and improving operation efficiency. When adjusting the opening angle and lifting height is ineffective, the control module changes the distribution state of the ion exchange resin by rotating the lifting device, which helps to improve the distribution of the ion exchange resin and thus increase the flow rate. The data analysis module continuously monitors the actual pure water flow rate through the flowmeter and compares it with the standard flow rate range, ensuring the real-time feedback and self-adjustment ability of the fine mixing acid unit. If, after rotating the lifting device, the second pure water flow rate comparison result shows that the flow rate has returned to the standard flow rate range, the central control module will not replace the resin, thus avoiding unnecessary costs and downtime. If the rotation adjustment still cannot make the flow rate reach the standard, the central control module will trigger the resin replacement procedure, ensuring that the fine mixing acid unit can continuously provide pure water flow rate that meets the standard. Avoiding unnecessary ion exchange resin replacement can extend the service life of the resin. The fine mixing acid unit can automatically select the most suitable adjustment measure according to the actual situation, improving the flexibility of operation.

[0096] Specifically, for the case where the ion exchange resin is not replaced, the data analysis module adjusts the initial opening degree of the flow rate control valve according to the absolute value of the difference between the initial heavy metal content of the pure water detected by the pure water detection device and the minimum value of the target pure water heavy metal content range to obtain the target opening degree of the flow rate control valve.

[0097] The pure water detection device detects the heavy metal content of the pure water to obtain the initial heavy metal content of the pure water. The data analysis module calculates the absolute value of the difference between the initial heavy metal content and the minimum value of the preset target pure water heavy metal content.

[0098] For the case where the comparison result of the initial heavy metal content is that the initial heavy metal content of the pure water is less than the minimum value of the target pure water heavy metal content range, the control module controls the flow rate control valve to increase the opening degree to obtain the target opening degree of the flow rate control valve. Among them, the absolute value of the difference between the initial heavy metal content and the minimum value of the target pure water heavy metal content and the initial opening degree of the flow rate control valve determine the target opening degree of the flow rate control valve. The absolute value of the difference between the initial heavy metal content and the minimum value of the target pure water heavy metal content is positively correlated with the target opening degree of the flow rate control valve. The initial opening degree of the flow rate control valve is determined according to the filling volume and filling density of the ion exchange resin.

[0099] Example 1: If the absolute value of the difference between the initial heavy metal content and the minimum value of the target pure water heavy metal content is small, it indicates that the initial heavy metal content of the pure water is close to the minimum value of the target pure water heavy metal content. The data analysis module will instruct the flow rate control valve to maintain a small opening degree.

[0100] If the initial heavy metal content is 0.008 mg / L and the minimum value of the target pure water heavy metal content is 0.01 mg / L, then the target opening degree of the flow rate control valve is 70%, where the initial opening degree of the flow rate control valve is 50%.

[0101] If the absolute value of the difference between the initial heavy metal content and the minimum value of the target pure water heavy metal content is large, it indicates that there is a large gap between the initial heavy metal content of the pure water and the target pure water heavy metal content. The data analysis module will instruct the flow rate control valve to increase the opening degree.

[0102] If the initial heavy metal content is 0.003 mg / L and the minimum value of the target pure water heavy metal content is 0.01 mg / L, then the target opening degree of the flow rate control valve is 90%, where the initial opening degree of the flow rate control valve is 50%.

[0103] The pure water detection device monitors the flow rate and heavy metal content of the pure water in real time and feeds the data back to the data analysis module. The data analysis module adjusts the opening degree of the flow rate control valve according to the feedback data to maintain the heavy metal content of the pure water within the target range.

[0104] Example 2: Assume that the heavy metal content in the initial pure water is 10 ppm, and the minimum value of the target pure water heavy metal content range is 5 ppm. The data analysis module calculates that the absolute value of the difference is 5 ppm. According to the preset algorithm, the data analysis module determines that it is necessary to increase the opening of the flow rate control valve to accelerate the flow rate of the acidic wastewater, thereby improving the treatment efficiency of the ion exchange resin. The central control module executes the instruction of the data analysis module and adjusts the opening of the flow rate control valve from 50% to 70%.

[0105] The pure water detection device monitors that the heavy metal content in the pure water gradually decreases. When the heavy metal content stabilizes at 5 ppm, the data analysis module instructs the central control module to maintain the current opening of the flow rate control valve.

[0106] By real-time monitoring and dynamically adjusting the flow rate of the acidic wastewater, the ion exchange resin can be utilized more effectively, and the efficiency of heavy metal removal can be improved. It can ensure that the heavy metal content in the output pure water is stably within the safety standard range, protecting the health of the end-users. By precisely controlling the flow rate of the acidic wastewater, unnecessary over-treatment can be avoided, saving the usage of ion exchange resin and the consumption of chemical reagents. Reasonably controlling the flow rate helps reduce the wear of the resin and extend its service life. The automated system reduces the need for manual intervention and lowers the risk of operation errors. The real-time monitoring of the pure water detection device and the rapid feedback mechanism of the data analysis module enable the precision mixing acidic unit to respond immediately to water quality changes and maintain the stability of the treatment effect. The automatic adjustment process reduces the manual intervention of the operator and improves the automation level. By reasonably adjusting the flow rate, the usage of the acidic wastewater is optimized, and unnecessary consumption is reduced. Ensuring that the heavy metal content of the pure water meets the target standard improves the quality of the final product. By making the absolute value of the difference between the initial heavy metal content and the minimum value of the target pure water heavy metal content positively correlated with the target opening of the flow rate control valve, it ensures that the heavy metal content of the pure water meets the standard while guaranteeing the purification efficiency.

[0107] Specifically, for the case of increasing the flow rate of the acidic wastewater, the central control module controls the flowmeter to detect the pure water flow rate at the drain outlet of the mixed bed to obtain the first actual pure water flow rate. The data analysis unit compares the first actual pure water flow rate with the preset pure water standard flow rate range to obtain the second pure water flow rate comparison result.

[0108] Specifically, the data analysis module determines whether to adjust the initial stirring period according to the second pure water flow rate comparison result to obtain the target stirring period.

[0109] Among them, the initial stirring period is determined according to the duration from the initial moment of the mixed bed purifying the acidic wastewater to the moment when the heavy metal content in the pure water is greater than the target pure water heavy metal content range.

[0110] For the case where the comparison result of the second pure water flow rate shows that the actual flow rate of the first pure water is less than the minimum value of the pure water standard flow rate range, based on the initial stirring period, the data analysis module shortens the stirring period according to the absolute value of the difference between the minimum value of the pure water standard flow rate range and the actual flow rate of the first pure water to obtain the first target stirring period. Among them, the first stirring period is inversely proportional to the absolute value of the difference between the minimum value of the pure water standard flow rate range and the actual flow rate of the first pure water;

[0111] For the case where the comparison result of the second pure water flow rate shows that the actual flow rate of the first pure water is within the pure water standard flow rate range, based on the initial stirring period, the data analysis module shortens the stirring period according to the average value of the pure water standard flow rate range to obtain the second target stirring period;

[0112] For the case where the comparison result of the second pure water flow rate shows that the actual flow rate of the first pure water is greater than the maximum value of the pure water standard flow rate range, the data analysis module does not adjust the initial stirring period;

[0113] Example:

[0114] Suppose the actual flow rate of the first pure water is less than the minimum value of the pure water standard flow rate range, which is 90 L / min.

[0115] The data analysis module calculates that the absolute value of the difference between the minimum value of the pure water standard flow rate range, which is 100 L / min, and the actual flow rate of the first pure water, which is 90 L / min, is 10 L / min.

[0116] The data analysis module shortens the stirring period according to the absolute value of the difference. For example, if the absolute value of the difference is 10 L / min, the stirring period is shortened by 10% to 27 minutes to obtain the first target stirring period;

[0117] Suppose the actual flow rate of the first pure water is within the pure water standard flow rate range [90 L / min, 120 L / min].

[0118] The data analysis module shortens the stirring period according to the average value of the pure water standard flow rate range, which is 125 L / min. For example, it is shortened by 5% to 28.5 minutes to obtain the second target stirring period;

[0119] Suppose the actual flow rate of the first pure water, which is 160 L / min, is greater than the maximum value of the pure water standard flow rate range. The data analysis module does not adjust the initial stirring period and keeps it at 30 minutes unchanged.

[0120] By monitoring the actual flow rate of pure water in real time and comparing it with the standard flow rate range, the precision mixing acidic unit can adjust the stirring cycle according to the result of the comparison of the second pure water flow rate, thereby optimizing the purification efficiency of the mixed bed and ensuring that the heavy metal content meets the standard. The data analysis module accurately adjusts the stirring cycle according to the flow rate difference, which helps to achieve more refined operation control and improve the automation level of the system. By shortening the stirring cycle, energy consumption and equipment wear can be reduced while ensuring the treatment effect, and the operation cost can be lowered. Maintaining the matching of the stirring cycle and the flow rate helps to maintain the stable operation of the mixed bed and reduce the problem of unstable water quality caused by flow rate fluctuations. The precision mixing acidic unit can automatically adjust the stirring cycle according to different flow rate situations to adapt to different treatment requirements and operating conditions. By shortening the stirring cycle, the precision mixing acidic unit can respond more quickly to the situation of insufficient actual flow rate of the first pure water, improve the treatment speed, and ensure the heavy metal removal effect. Fine-tuning the stirring cycle helps to maintain the optimal operating state of the system, ensure water quality while avoiding over-treatment. When the actual flow rate of the first pure water exceeds the expectation, keeping the stirring cycle unchanged can ensure that the treatment effect of the system will not be reduced due to the too fast flow rate.

[0121] Specifically, multiple layers of filter meshes are arranged in the filtration chamber, and the data processing module determines whether to replace the filter mesh according to the area of the filter mesh covered by the blockage.

[0122] Specifically, for the situation of blockage accumulation, the central control module controls the grasping device to remove the agglomerated blockage deposited on the filter mesh.

[0123] Three layers of filter meshes with different pore sizes are arranged in the filtration chamber, which are respectively used to intercept solid particles of different sizes.

[0124] The first layer of filter mesh has the largest pore size and is used to intercept larger particles; the pore sizes of the second and third layers of filter meshes gradually decrease and are used to further filter smaller particles.

[0125] The imaging device periodically takes pictures of the filter mesh and transmits the image data to the data processing module. The data processing module analyzes the area of the blockage covered on the filter mesh through image recognition technology.

[0126] When the area of the blockage coverage reaches the preset threshold,

[0127] For example, when it exceeds 30% of the filter mesh area, the data processing module sends a signal to replace the filter mesh.

[0128] The central control module controls the grasping device to remove the blockage on the filter mesh. The grasping device includes but is not limited to a rotating brush, a fishing net, and a robotic arm, which are used to break up and remove stubborn blockages. This embodiment does not make specific limitations.

[0129] After the cleaning operation is completed, the grasping device collects the blockage into a designated container for subsequent processing.

[0130] For the situation where the blockage cannot be completely removed by the grasping device or the filtration efficiency of the filter screen significantly decreases, the central control module will issue an instruction to replace the filter screen.

[0131] For example: the standard flow rate range in the filtration chamber is 80 liters per minute - 100 liters per minute. If the filtration flow meter measures the actual flow rate in the filtration chamber as 60 liters per minute, then replace the filter screen.

[0132] By setting multiple filter screens with different pore sizes, different-sized solid particles can be effectively intercepted, improving the overall filtration efficiency and ensuring that the outflow water quality meets the standards. By periodically monitoring the coverage area of the blockage and removing it in a timely manner, excessive blockage of the filter screen can be prevented, extending its service life. The combined use of the imaging device and the data processing module realizes the automatic monitoring and evaluation of the blockage situation of the filter screen, reduces manual intervention, and improves the automation level. The central control module controls the grasping device to automatically remove the blockage, which can maintain the normal operation of the filtration chamber without shutting down, reducing the downtime caused by replacing the filter screen. By comparing the preset threshold with the actual flow rate, it can accurately determine when to replace the filter screen, making the maintenance operation more precise and efficient. Timely removal of the blockage and replacement of the filter screen can effectively prevent the decline of the filtration effect and ensure the water quality safety of the final effluent.

[0133] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

[0134] The above are only the preferred embodiments of the present invention and are not used to limit the present invention; for those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An energy-saving acid mixing unit with automatic control, characterized in that: include The filter chamber is arranged at the first section of the fine mixing acid unit and is used to filter the acid wastewater to obtain the initial acid wastewater. It is equipped with a multi-layer filter screen and a flow meter. A grabbing device, which is arranged in the filtering bin and is used to remove agglomerated blockages; An imaging device, which is arranged on the upper part of the filter chamber and is used to photograph the agglomerated blockages; A mixed bed connected to the filter tank via a first pipeline and used for purifying the initial acidic wastewater; A saturated resin recovery bin connected to the upper portion of the mixed bed for recovering saturated resin, wherein the saturated resin is an ion exchange resin that absorbs pollutants to a saturated state during the filtration of acidic wastewater; A lifting device, which is arranged at the bottom of the mixed bed and can move up and down in the mixed bed, comprises a lifting support rod, a filter screen, a sliding sleeve and a plurality of brackets connected to the sliding sleeve, wherein the filter screen is connected to the sliding sleeve through the bracket, and the lifting support rod is slidably connected to the sliding sleeve; A pure water detection device, which is arranged at the mixed bed drain outlet and is used to detect the heavy metal content of pure water; A flow meter, which is arranged at the mixed bed drain port and is used to detect the pure water flow rate; A flow rate control valve, which is arranged at the drainage port of the filter chamber and is used to control the flow rate of the acidic wastewater entering the mixed bed; A data analysis module, which is connected to the pure water detection device, the imaging device and the flow meter, and determines whether to replace the filter screen according to the area of ​​the agglomerated blockage; determines whether to replace the ion exchange resin in the mixed bed according to the initial heavy metal content comparison result; adjusts the opening angle or lifting height of the lifting device according to the first pure water flow comparison result; and determines whether to adjust the initial stirring period according to the second pure water flow comparison result to obtain the target stirring period; A central control module, which is connected to the lifting device, the flow control valve and the grabbing device, and is used to control the lifting device to adjust the opening area, lifting height and rotation speed, or adjust the opening of the flow control valve according to the output instruction of the data analysis module; Among them, the first pure water flow comparison result is based on the first detection cycle, the flowmeter detects the pure water flow to obtain the actual pure water flow, and the data analysis module compares the actual pure water flow and the preset pure water standard flow range; the second pure water flow comparison result is the flowmeter monitoring the actual pure water flow after controlling the lifting support rod to start rotating at the initial rotation speed to change the distribution state of the ion exchange resin to obtain the second pure water flow, and compares the second pure water flow and the minimum value of the pure water standard flow range.

2. The energy-saving fine mixing acid unit with automatic control according to claim 1 is characterized in that: The pure water detection device detects the heavy metal content of the pure water in an initial detection cycle to obtain the initial heavy metal content of the pure water. The data analysis module compares the initial heavy metal content of the pure water with the target pure water heavy metal content range to obtain an initial heavy metal content comparison result, and determines whether to replace the ion exchange resin in the mixed bed according to the initial heavy metal content comparison result.

3. The energy-saving fine mixing acid unit with automatic control according to claim 2 is characterized in that: In the case of replacing the ion exchange resin, the central control module adjusts the initial detection cycle according to the purification time to obtain a first detection cycle; The purification time is the time from the initial purification of the mixed bed to the replacement of the ion exchange resin.

4. The energy-saving type fine mixing acid unit with automatic control according to claim 3 is characterized in that: Based on the first detection cycle, the flow meter detects the pure water flow to obtain the actual pure water flow. The data analysis module compares the actual pure water flow with the preset pure water standard flow range to obtain a first pure water flow comparison result. The data analysis module adjusts the opening angle or lifting height of the lifting device according to the first pure water flow comparison result.

5. The energy-saving type fine mixing acid unit with automatic control according to claim 4 is characterized in that: In the case where adjusting the opening angle and the lifting height of the lifting device cannot satisfy the situation that the actual pure water flow rate is within the pure water standard flow rate range, the control module controls the lifting device to rotate at the initial rotation speed or replace the ion exchange resin.

6. The energy-saving type fine mixing acid unit with automatic control according to claim 5 is characterized in that: In the case where the ion exchange resin is not replaced, the data analysis module adjusts the initial opening of the flow rate control valve according to the absolute value of the difference between the initial pure water heavy metal content detected by the pure water detection device and the minimum value of the target pure water heavy metal content range to obtain the target opening of the flow rate control valve.

7. The energy-saving fine mixing acid unit with automatic control according to claim 6 is characterized in that: In the case of increasing the flow rate of acidic wastewater, the central control module controls the flowmeter to detect the pure water flow at the mixed bed outlet to obtain the first actual pure water flow, and the data analysis unit compares the first actual pure water flow with the preset pure water standard flow range to obtain the second pure water flow comparison result.

8. The energy-saving type fine mixing acid unit with automatic control according to claim 7 is characterized in that: The data analysis module determines whether to adjust the initial stirring period according to the comparison result of the second pure water flow rate to obtain a target stirring period; The initial stirring period is determined according to the duration from the initial moment of the mixed bed purification of acidic wastewater to the moment when the heavy metal content of pure water is greater than the target heavy metal content of pure water.

9. The energy-saving type fine mixing acid unit with automatic control according to claim 8, characterized in that: Multiple layers of filter screens are arranged in the filter bin, and the data processing module determines whether to replace the filter screen according to the area of ​​the filter screen covered by the blockage.

10. The energy-saving type fine mixing acid unit with automatic control according to claim 9, characterized in that: In the case of blockage accumulation, the central control module controls the grabbing device to remove the aggregated blockage accumulated in the filter.

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