Modularized electroplating wastewater treatment device

Abstract

A modularized electroplating wastewater treatment device comprises an adjusting tank module, a reaction tank module, a sedimentation tank module, a filter tank module, an activated carbon adsorption module and a clean water tank module which are of a vertical stacking or horizontal parallel structure. Each module is provided with an independent PLC (Programmable Logic Controller) and is linked with the central controller; the regulating tank module, the reaction tank module, the sedimentation tank module, the filter tank module, the activated carbon adsorption module and the clean water tank module are sequentially connected through standardized pipelines and flanges, and water is conveyed through a pipeline pump. According to the modularized electroplating wastewater treatment device disclosed by the utility model, modularized connection and assembly are adopted, so that the installation and debugging of the device are simpler, more convenient and quicker, the treatment capacity of the device can be flexibly adjusted, and various pollutants in electroplating wastewater can be gradually removed through the synergistic effect of a plurality of modules, so that the effluent quality reaches a higher standard.

Description

TECHNICAL FIELD

[0001] The utility model relates to electroplating wastewater treatment technical field, concretely relates to a modular electroplating wastewater treatment device. BACKGROUND

[0002] As an important surface treatment process, electroplating has been widely used in industrial production, such as electronics, machinery, automobiles and many other fields. However, the electroplating process produces a large amount of wastewater containing heavy metal ions such as chromium, nickel, copper, zinc and other organic matter and pollutants. If these electroplating wastewater is directly discharged without effective treatment, it will cause serious pollution to the ecological environment such as soil and water, endangering human health and ecological balance.

[0003] The existing electroplating wastewater treatment device has the problems of unreasonable layout and large floor area, which is not conducive to the effective use of space, and the connection between each treatment tank is complex, installation and expansion are difficult, and it is difficult to meet the needs of electroplating enterprises of different scales. In terms of treatment process, the treatment capacity of some treatment units is limited, and it is difficult to effectively remove various pollutants in wastewater, especially the treatment effect of fine suspended solids, colloidal substances and residual organic matter is not good. In addition, the sludge treatment and recycling technology is not perfect, causing waste of resources and risk of secondary pollution.

[0004] In order to solve the above technical problems, the utility model designs a modular electroplating wastewater treatment device. UTILITY MODEL CONTENT

[0005] The utility model aims at overcoming the above shortcomings, and provides a modular electroplating wastewater treatment device, which is reasonable in design, adopts modular connection and assembly, so that the installation and debugging of the device are more convenient and fast, various pollutants in electroplating wastewater are gradually removed through the synergistic effect of multiple modules and accurate control treatment, the stability and reliability of the treatment effect are good, the effluent quality reaches a high standard, fault isolation can be realized for easy maintenance, and the device has a wide application prospect.

[0006] Technical scheme: A modular electroplating wastewater treatment device comprises an adjusting tank module, a reaction tank module, a sedimentation tank module, a filter tank module, an activated carbon adsorption module and a clear water tank module, and the modules are vertically stacked or horizontally connected in parallel; each module is provided with an independent PLC controller and is connected with a central controller; the adjusting tank module, the reaction tank module, the sedimentation tank module, the filter tank module, the activated carbon adsorption module and the clear water tank module are connected in sequence through standardized pipes and flanges and the water body is transported through pipe pumps.

[0007] The electroplating wastewater treatment device adopts modular design, comprises an adjusting pool module, a reaction pool module, a sedimentation pool module, a filter pool module, an activated carbon adsorption module and a clean water pool module, all the modules are connected through standardized pipelines and flanges, quick assembly and expansion can be realized, the modules are vertically stacked or horizontally connected in parallel, the occupation area can be reduced, each module is provided with an independent PLC controller and is connected with a central controller, and fault isolation maintenance can be realized.

[0008] The inlet water sequentially passes through the adjusting pool module, the reaction pool module, the sedimentation pool module, the filter pool module, the activated carbon adsorption module and the clean water pool module, and finally, outlet water or recycled water is obtained.

[0009] Further, the modular electroplating wastewater treatment device is provided with an automatic acid / alkali adding device on one side of the adjusting pool module and is connected with the adjusting pool module; an integrated pH / flow / conductivity sensor is arranged in the adjusting pool module and is fixed on the pool wall in the adjusting pool module; the automatic acid / alkali adding device and the integrated pH / flow / conductivity sensor are connected with the PLC controller of the adjusting pool module.

[0010] Preferably, the sensor probe of the integrated pH / flow / conductivity sensor is completely immersed in the water of the adjusting pool module and is perpendicular to the water flow direction, so as to ensure the accuracy of measurement.

[0011] The integrated pH / flow / conductivity sensor transmits the measured pH, flow and conductivity data to the PLC controller, and the target pH value, flow range and conductivity range of the wastewater are pre-set in the PLC controller.

[0012] Further, the modular electroplating wastewater treatment device is provided with a plurality of baffle plates on the pool wall in the adjusting pool module.

[0013] Preferably, the baffles are perpendicular to the water flow direction of the water in the conditioning tank module, and the baffles are arranged in a staggered manner. The baffles can be installed in a staggered manner, so that the wastewater forms a tortuous flow path in the conditioning tank module, prolonging the hydraulic retention time.

[0014] Further, the above-mentioned modular electroplating wastewater treatment device, the automatic dosing device is arranged outside one side of the reaction tank module and connected with the reaction tank module; the cyclone stirrer is arranged in the reaction tank module; the automatic dosing device and the cyclone stirrer are respectively connected with the PLC controller of the reaction tank module.

[0015] The automatic dosing device uses the reaction reagent to react with the heavy metal ions in the water to generate a precipitate. The cyclone stirrer arranged in the reaction tank module can make the mixing more efficient and improve the reaction efficiency.

[0016] Further, the above-mentioned modular electroplating wastewater treatment device, the automatic dosing device is arranged outside one side of the reaction tank module and connected with the reaction tank module; the cyclone stirrer is arranged in the reaction tank module; the automatic dosing device and the cyclone stirrer are respectively connected with the PLC controller of the reaction tank module.

[0017] The precipitate generated by the reaction gradually precipitates to the bottom of the sedimentation tank module under the action of gravity, and naturally converges to the hopper along the slope of the bottom. When the sludge in the hopper accumulates to a certain extent, the sludge will enter the sludge discharge pipeline connected thereto through the sludge discharge port of the hopper. The sludge discharge pipeline is equipped with a sludge discharge pump to ensure that the sludge can be smoothly transported from the hopper to the subsequent integrated plate and frame filter press. The integrated plate and frame filter press uses the extrusion action of the plate and frame to squeeze out the water in the sludge. When the integrated plate and frame filter press completes a filtration process, the plate and frame is opened, and the filter cake with a water content of less than 60% is unloaded from the filter chamber. At this time, the filter cake has a low water content and a significantly reduced volume, which is convenient for subsequent treatment and transportation. In addition, the filter cake can be recycled according to the types and contents of heavy metals therein using appropriate methods.

[0018] Further, the modular electroplating wastewater treatment device has the beneficial effects that:

[0019] The three-stage filtering system of the filter material layer, the fiber bundle layer and the ceramic membrane layer can realize efficient filtration, the air backwashing pipe and the air compressor and the water backwashing pipe and the water backwashing pump form an air-water backwashing system, which can clean the filtering system in time and effectively, and ensure long-term stable operation of the filtering pool module.

[0020] Further, the modular electroplating wastewater treatment device has the beneficial effects that:

[0021] Further, the modular electroplating wastewater treatment device has the beneficial effects that:

[0022] The honeycomb activated carbon filter core is used, the regeneration efficiency of the hot nitrogen desorption regeneration is greater than 80%, and the replacement cost is reduced.

[0023] The beneficial effects of the utility model are that:

[0024] (1) The modular electroplating wastewater treatment device has the beneficial effects that:

[0025] (2) The modular electroplating wastewater treatment device, through the synergistic effect of multiple modules, gradually removes various pollutants in the electroplating wastewater, so that the effluent quality reaches a high standard, wherein the adjusting tank module provides stable water inlet conditions for the subsequent treatment unit by adjusting the water quality and water volume of the wastewater, the reaction tank module generates precipitates by chemical reaction of chemical agents and heavy metal ions, the sedimentation tank module separates the precipitates from the supernatant by gravity to realize solid-liquid separation, the filter tank module further removes residual fine suspended solids and colloidal substances in the wastewater, the activated carbon adsorption module removes residual organic matter and a small amount of heavy metal ions in the wastewater by the adsorption effect of activated carbon, and the clear water tank module stores the treated clear water meeting the standard for reuse or discharge. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The flow chart of the modular electroplating wastewater treatment device;

[0027] Figure 2 The control framework diagram of the modular electroplating wastewater treatment device;

[0028] Figure 3 The adjusting tank module structure diagram of the modular electroplating wastewater treatment device;

[0029] Figure 4 The reaction tank module structure diagram of the modular electroplating wastewater treatment device;

[0030] Figure 5 The sedimentation tank module structure diagram of the modular electroplating wastewater treatment device;

[0031] Figure 6 The filter tank module structure diagram of the modular electroplating wastewater treatment device;

[0032] Figure 7 The internal schematic diagram of the filter tank module of the modular electroplating wastewater treatment device;

[0033] In the figure: the adjusting tank module 1, the automatic acid / base adding device 11, the integrated pH / flow rate / conductivity sensor 12, the baffle plate 13, the reaction tank module 2, the automatic reagent adding device 21, the cyclone stirrer 22, the sedimentation tank module 3, the conical hopper 31, the sludge discharge pipeline 32, the integrated plate-and-frame filter press 33, the sludge discharge pump 34, the filter tank module 4, the supporting layer 41, the filter material layer 42, the fiber bundle layer 43, the ceramic membrane layer 44, the backwashing air pipeline 45, the backwashing water pipeline 46, the air compressor 47, the backwashing water pump 48, the backwashing water tank 49, the activated carbon adsorption module 5, the clear water tank module 6, the PLC controller 7, and the central controller 8. DETAILED DESCRIPTION

[0034] The utility model is further illustrated by the following combination of drawings Figure 1 、 2 , 3, 4, 5, 6, 7 and embodiment 1, embodiment 2.

[0035] Embodiment 1

[0036] As Figure 1 Indicated, the modular electroplating wastewater treatment device, including adjusting pool module 1, reaction pool module 2, sedimentation tank module 3, filter tank module 4, activated carbon adsorption module 5, clear water tank module 6, water is sequentially through adjusting pool module 1, reaction pool module 2, sedimentation tank module 3, filter tank module 4, activated carbon adsorption module 5, clear water tank module 6, and finally effluent or reuse.

[0037] Specifically: adjusting pool module 1 is used for adjusting the water quality and water quantity of electroplating wastewater, so that the subsequent processing unit can stably run, reaction pool module 2 is the core area of removing heavy metal ions, and the heavy metal ions are reacted to generate precipitate by adding chemical reagent, the precipitate generated by reaction is separated from supernatant in sedimentation tank module 3, solid-liquid separation is realized, filter tank module 4 further removes the residual fine suspended matter and colloidal substance in wastewater, improves the effluent water quality, activated carbon adsorption tank module 5 is used for adsorbing the residual organic matter and small amount of heavy metal ions in wastewater, reduces the COD and heavy metal content of wastewater, and clear water tank module 6 stores treated water meeting the standard and is used for reuse or discharge.

[0038] Wherein, all the modules are connected using standardized pipes and flanges, can realize quick assembly and expansion, and the modules are vertically stacked or horizontally connected in parallel, so that the occupied area can be reduced.

[0039] Wherein, as Figure 2 Indicated, each module is configured with an independent PLC controller 7 and is linked with a central controller 8, and this design can realize fault isolation, so that when a module fails, the normal operation of other modules is not affected, the fault module can be quickly located and repaired, and the maintenance cost and influence on production are reduced.

[0040] Embodiment 2

[0041] Based on the structure of embodiment 1, as Figure 1 、 2 , 3, 4, 5, 6, 7.

[0042] As Figure 2 、 3As shown, in the modulated electroplating wastewater treatment device of this invention, the regulating tank module 1 has an integrated pH / flow / conductivity sensor 12 installed in a relatively stable and representative location within the regulating tank module 1, typically in the lower middle part of the regulating tank module 1, about 1 / 3 to 1 / 4 of the tank depth from the bottom. The sensor probe of the integrated pH / flow / conductivity sensor 12 is completely submerged in the water of the regulating tank module 1 and perpendicular to the water flow direction to ensure measurement accuracy.

[0043] In addition, an automatic acid / alkali dosing device 11 is installed on one side of the equalization tank module 1 and connected to the equalization tank module 1. An integrated pH / flow / conductivity sensor 12 transmits the measured pH, flow, and conductivity data to a PLC controller 7. The target pH value, flow range, and conductivity range of the wastewater are preset in the PLC controller 7. When the sensor measurement value exceeds the set range, the PLC controller 7 calculates the amount of acid or alkali to be added based on the deviation. The PLC controller 7 then sends a command to the automatic acid / alkali dosing device 11 based on the calculation result, controlling the opening and closing of the dosing pump and the dosing speed of the automatic acid / alkali dosing device 11.

[0044] For example, if the pH value is lower than the target value, the PLC controller 7 will start the alkali pump to add alkali solution to the equalization tank module 1 according to the calculated flow rate; conversely, if the pH value is higher than the target value, the acid pump will be started to add acid solution. At the same time, flow rate and conductivity data can also be used as auxiliary parameters to further optimize the dosing control strategy and ensure water quality stability.

[0045] Furthermore, several baffles 13 are installed on the inner wall of the equalization tank module 1. The baffles 13 are perpendicular to the water flow direction inside the equalization tank module 1 and are installed in a staggered manner, so that the wastewater forms a tortuous flow path inside the equalization tank module 1, prolonging the hydraulic retention time. The height of the baffles 13 is generally 2 / 3 to 3 / 4 of the depth of the equalization tank module 1, the width is determined according to the width of the equalization tank module 1 and the design requirements, and the spacing between each baffle 13 should be determined according to the wastewater flow rate and hydraulic retention time.

[0046] like Figure 2 , 4 As shown, the reaction tank module 2 of the modular electroplating wastewater treatment device of this utility model has an automatic dosing device 21 installed on one side outside the reaction tank module 2, and a vortex stirrer 22 installed inside the reaction tank module 2. The automatic dosing device 21 adds reaction reagents into the reaction tank module to react with heavy metal ions in the water to form precipitates. The vortex stirrer 22 installed inside the reaction tank module 2 can make mixing more efficient and improve reaction efficiency.

[0047] like Figure 2 ,5 As shown, the sedimentation tank module 3 of the modular electroplating wastewater treatment device of this utility model has a conical hopper 31 at the bottom inside the sedimentation tank module 3, and the sludge discharge port of the conical hopper 31 is connected to the sludge discharge pipe 32. An integrated plate and frame filter press 33 is provided on one side outside the sedimentation tank module 3, and the integrated plate and frame filter press 33 is connected to the sludge discharge pipe 32 through a sludge discharge pump 34.

[0048] The precipitate generated by the reaction gradually settles to the bottom of the sedimentation tank module 3 under gravity. Following the slope of the bottom, it naturally converges towards the conical hopper 31. When the sludge accumulates to a certain level in the conical hopper 31, it enters the connected sludge discharge pipe 32 through the sludge discharge port of the conical hopper 31. The sludge discharge pipe 32 is equipped with a sludge discharge pump 34 to ensure that the sludge can be smoothly transported from the conical hopper to the integrated plate and frame filter press 33 for subsequent treatment. The integrated plate and frame filter press uses the squeezing action of the plates and frames to squeeze out the water from the sludge. Specifically, after the sludge enters the filter chamber of the integrated plate and frame filter press, under pressure, the water is discharged through the filter cloth, while the sludge is retained in the filter chamber and gradually forms a filter cake. As the filtration process proceeds, the thickness of the filter cake gradually increases. When a certain thickness is reached, feeding is stopped. After the integrated plate and frame filter press 33 completes one filtration process, the plates and frames are opened, and the filter cake with a moisture content of less than 60% is unloaded from the filter chamber. At this point, the filter cake has a low moisture content and a significantly reduced volume, making it easier for subsequent processing and transportation. In addition, the filter cake can be recycled using appropriate methods based on the type and content of heavy metals it contains.

[0049] like Figure 2 , 6 As shown in Figure 7, the filter tank module 4 of the modular electroplating wastewater treatment device of this utility model has a support layer 41 installed at the bottom. Gravel is used as the support layer, which supports the upper quartz sand filter media and ensures uniform water flow distribution. The thickness and particle size distribution of the support layer 11 are determined according to the design requirements, and the thickness is usually between 200-500 mm.

[0050] The selected quartz sand is evenly packed into the filter module 4 to form a filter media layer 42. The particle size of the quartz sand is generally between 0.5-2.0 mm. The packing height is determined according to the design of the filter module 4 and the amount of water to be treated. Quartz sand has a large specific surface area and porosity. When wastewater passes through the quartz sand layer, larger suspended solids, colloids, and other impurities are trapped by the quartz sand, playing a preliminary filtration role. At the same time, the biofilm on the surface of the quartz sand can also decompose and remove some organic matter.

[0051] A grid with fiber bundles is installed above the filter layer 42 to form a fiber bundle layer 43. The length and diameter of the fiber bundles are determined according to the design and processing requirements of the filter tank module 4, and are generally between 1000-2000mm in length and 0.5-1.0mm in diameter. The grid is firmly installed on the tank wall of the filter tank module 4 to ensure that the fiber bundles can be stably suspended in the filter tank module 4. During loading, attention should be paid to the moderate tightness of the fiber bundles to avoid affecting the filtration effect due to excessive looseness or tightness. The fiber bundles have softness and compressibility, and during the filtration process, the fiber bundles will be pressed against each other under the action of the water flow, forming a filter layer with different porosities. When wastewater passes through the fiber bundle layer, smaller particulate impurities will be intercepted and adsorbed by the fiber bundles, further improving the filtration precision.

[0052] A ceramic membrane is installed at the top of the filter tank module 4. The ceramic membrane has a uniform microporous structure and a filtration precision of 0.1μm, which can effectively intercept bacteria, viruses, and other impurities, and make the effluent water quality reach a high standard. At the same time, the ceramic membrane has good chemical stability and strong anti-pollution ability, which can ensure long-term stable filtration effect. The water inlet of the filter tank module 4 is arranged at the bottom of the filter tank module 4, and the water outlet is arranged above the side of the filter tank module 4.

[0053] Further, a backwashing air pipe line 45 is installed on the side of the filter tank module 4. The arrangement of the backwashing air pipe line 45 should ensure that air can be uniformly introduced into the filter tank module 4. A plurality of air outlets are arranged on the backwashing air pipe line 45, and the spacing and aperture of the air outlets are determined according to the size of the backwashing air pipe and the backwashing requirements. The backwashing air pipe line 45 is connected with an air compressor 47.

[0054] Further, a backwashing water pipe line 46 is installed on the side of the filter tank module 4. The arrangement of the backwashing water pipe line 46 should cooperate with the backwashing air pipe line 45 to ensure that air and water can be uniformly mixed and distributed. A plurality of water outlets are arranged on the backwashing water pipe line 46, and the spacing and aperture of the water outlets are determined according to the size of the filter tank module 4 and the backwashing requirements. The backwashing water pipe line 46, a backwashing water pump 48, and a backwashing water tank 49 are connected.

[0055] Specifically: 1, air washing stage: when the filter tank module 4 runs for a period of time, the internal filter material surface will accumulate a large amount of impurities, resulting in increased filtration resistance. At this time, start the air compressor 46, air is introduced into the filter tank module 4, air enters the filter tank module 4 through the air outlet on the backwash air pipe 45, forms air bubbles in the filter material, the air bubbles rise in the process of filter material impact and friction, the impurities on the surface of the filter material loose and fall off; 2, water washing stage: after a period of air washing, start the backwash water pump 48, introduce backwash water into the filter tank module 4, the backwash water enters the filter tank module 4 through the water outlet on the backwash water pipe 46, and forms an air-water mixed flow after mixing with air, the air-water mixed flow flows upward in the filter material, and the loosened impurities are carried out of the filter material and discharged through the water outlet; 3, air-water combined flushing stage: during the water washing process, air is also introduced to make the air-water combined effect more obvious, and the air-water combined flushing can more effectively remove the impurities on the surface and inside of the filter material, improve the backwashing effect, and prolong the service life of the filter material.

[0056] The active carbon adsorption module 5 of the modular electroplating wastewater treatment device has the advantages that the adsorption tank loaded with the honeycomb active carbon filter element is adopted, the honeycomb active carbon filter element is adopted, hot nitrogen gas desorption regeneration is supported, and the replacement cost is reduced.

[0057] The above is only the preferred embodiment of the utility model, and it should be pointed out that for ordinary skilled personnel in the technical field, several improvements can be made without departing from the principle of the utility model, and these improvements should also be regarded as the protection range of the utility model.

Claims

1. A modular electroplating wastewater treatment device, characterized by, The application relates to a water treatment system, which comprises a regulating pool module (1), a reaction pool module (2), a sedimentation pool module (3), a filter pool module (4), an activated carbon adsorption module (5) and a clean water pool module (6), wherein the modules are vertically stacked or horizontally connected in parallel; each module is provided with an independent PLC controller (7) and is connected with a central controller (8); the regulating pool module (1), the reaction pool module (2), the sedimentation pool module (3), the filter pool module (4), the activated carbon adsorption module (5) and the clean water pool module (6) are sequentially connected through standardized pipes and flanges and water is transported through pipe pumps.

2. The modular electroplating wastewater treatment device of claim 1, wherein, An automatic acid / alkali adding device (11) is arranged on one side of the regulating pool module (1) and is connected with the regulating pool module (1); an integrated pH / flow / conductivity sensor (12) is arranged in the regulating pool module (1) and is fixed on the inner wall of the regulating pool module (1); the automatic acid / alkali adding device (11) and the integrated pH / flow / conductivity sensor (12) are connected with the PLC controller (7) of the regulating pool module (1) respectively.

3. The modular electroplating wastewater treatment device of claim 1, wherein, A plurality of baffles (13) are arranged on the inner wall of the regulating pool module (1).

4. The modular electroplating wastewater treatment device of claim 1, wherein, An automatic reagent adding device (21) is arranged on one side of the reaction pool module (2) and is connected with the reaction pool module (2); a cyclone stirrer (22) is arranged in the reaction pool module (2); the automatic reagent adding device (21) and the cyclone stirrer (22) are connected with the PLC controller (7) of the reaction pool module (2) respectively.

5. The modular electroplating wastewater treatment device of claim 1, wherein, A conical hopper (31) is arranged at the bottom of the sedimentation pool module (3), a sludge discharge pipe (32) is connected with the sludge discharge port of the conical hopper (31); an integrated plate-and-frame filter press (33) is arranged on one side of the sedimentation pool module (3), the integrated plate-and-frame filter press (33) is connected with the sludge discharge pipe (32) through a sludge discharge pump (34); the integrated plate-and-frame filter press (33) and the sludge discharge pump (34) are connected with the PLC controller (7) of the sedimentation pool module (3) respectively.

6. The modular electroplating wastewater treatment device of claim 1, wherein, A supporting layer (41) is arranged at the bottom of the filter pool module (4), a filter material layer (42) is arranged above the supporting layer (41) in the filter pool module (4), a fiber bundle layer (43) is arranged above the filter material layer (42) in the filter pool module (4), and a ceramic membrane layer (44) is arranged above the fiber bundle layer (43) in the filter pool module (4).

7. The modular electroplating wastewater treatment device of claim 1, wherein, The filter tank module (4) is respectively provided with a backwashing air pipe (45) and a backwashing water pipe (46) on the side, the backwashing air pipe (45) is provided with a plurality of air outlets, the backwashing water pipe (46) is provided with a plurality of water outlets; the backwashing air pipe (45) is connected with an air compressor (47) outside the filter tank module (4), the backwashing water pipe (46) is connected with a backwashing water pump (48) and a backwashing water tank (49) outside the filter tank module (4); the air compressor (47) and the backwashing water pump (48) are connected with a PLC controller (7) of the filter tank module (4).

8. The modular electroplating wastewater treatment device of claim 6, wherein, The supporting layer (41) is filled with gravel; the filter material layer (42) is filled with quartz sand; the fiber bundle layer (43) is provided with a grid installed with fiber bundles; and the ceramic membrane layer (44) is provided with a ceramic membrane.

9. The modular electroplating wastewater treatment device of claim 1, wherein, The active carbon adsorption module (5) is at least one adsorption tank loaded with a honeycomb active carbon filter core.

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