Emulsion wastewater treatment system and method

Abstract

The invention relates to an emulsion wastewater treatment system and method, and relates to the field of industrial wastewater treatment.The emulsion wastewater treatment system comprises a pretreatment module, a missible oil separation module, a metal particle removal module and an active agent degradation module, the pretreatment module comprises a treatment pond, a filter cartridge and an impurity discharging assembly, and the treatment pond is used for containing emulsion; the filter cartridge is provided with a blanking area opposite to the impurity discharging assembly and a filter area opposite to the emulsion outlet, the filter cartridge can convey large-particle impurities in the filter area to the blanking area, and the impurity discharging assembly is lower than the part, located in the blanking area, of the filter cartridge, so that the large-particle impurities fall onto the impurity discharging assembly; the impurity discharging assembly can discharge and collect large-particle impurities, and the emulsion water outlet is higher than the part, located in the filtering area, of the filtering barrel, so that the large-particle impurities are accumulated on the filtering barrel. The emulsion filtering system has the advantages that emulsion supply does not need to be stopped, the filtering system keeps running continuously, and the emulsion filtering efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of industrial wastewater treatment, and in particular to an emulsion wastewater treatment system and method. Background Art

[0002] Industrial waste emulsions primarily originate from cutting, lubrication, and cleaning processes in industries like machining and metal rolling. Their composition is complex, including mineral oils, surfactants, heavy metal particles, and high concentrations of organic matter. If discharged untreated, these wastewaters can form a film that hinders oxygen exchange, while surfactants disrupt microbial ecosystems. Heavy metals pose a biotoxic and cumulative risk, posing a serious threat to the environment and human health.

[0003] In the prior art, it is necessary to use a filter to filter the particulate matter in the emulsion. As the filtration proceeds, more particulate matter gathers on the filter, and these particulate matter will block the emulsion from passing through the filter. It is necessary to manually clean the particulate matter accumulated on the filter. When cleaning the filter, the supply of emulsion needs to be shut down, which will take a long time to filter and reduce the filtration efficiency of the emulsion. Summary of the Invention

[0004] In order to improve the problem that the supply of emulsion needs to be shut down when cleaning the filter, resulting in reduced filtration efficiency of the emulsion, the present application provides an emulsion wastewater treatment system and method.

[0005] The present application provides an emulsion wastewater treatment system and method using the following technical solutions: An emulsion wastewater treatment system includes a pretreatment module, an emulsion oil separation module, a metal particle removal module, and an active agent degradation module. The pretreatment module can separate large impurities, the emulsion oil separation module can destroy emulsified oil droplets and separate free oil and suspended matter, the metal particle removal module can remove dissolved / suspended metals, and the active agent degradation module can decompose refractory surfactants. The pretreatment module includes a treatment tank, a filter cartridge, and an impurity discharge assembly. The treatment tank is used to hold the emulsion. The filter cartridge is provided with a drop zone opposite to the impurity discharge assembly and a filter zone opposite to the emulsion outlet. The filter cartridge can transport large impurities in the filter zone to the drop zone. The impurity discharge assembly is lower than the portion of the filter cartridge located in the drop zone so that large impurities fall onto the impurity discharge assembly. The impurity discharge assembly can collect the large impurities. The emulsion outlet is higher than the portion of the filter cartridge located in the filter zone so that large impurities accumulate on the filter cartridge.

[0006] By adopting the above technical solution, the system can sequentially perform pretreatment, emulsion oil separation, metal particle removal and surfactant degradation treatment on emulsion wastewater; the pretreatment module can separate large-particle impurities, and the filter cylinder rotates to transport large-particle impurities from the filtration area to the discharge area without stopping the emulsion supply, so that the filtration system can maintain continuous operation time and improve the emulsion filtration efficiency. At the same time, the impurity discharge component can collect and discharge large-particle impurities.

[0007] Preferably, the filter cartridge is rotatably arranged on the treatment tank, and the rotation axis of the filter cartridge is coplanar with the horizontal plane. A rotating motor is fixed on the treatment tank, and the rotating motor is connected to the filter cartridge to drive the filter cartridge to rotate.

[0008] By adopting the above technical solution, the filter cartridge is driven by a driving motor, thereby ensuring the stability of the filter cartridge rotation.

[0009] Preferably, a plurality of ribs are fixedly provided on the inner circumferential wall of the filter cartridge, and the plurality of ribs are arranged at circumferential intervals along the inner circumferential wall of the filter cartridge. Each rib is arranged along the axial direction of the filter cartridge, and a storage trough is formed between two adjacent ribs. Impurities filtered out by the filter cartridge can be accumulated in the storage trough.

[0010] By adopting the above technical solution, multiple ribs are arranged at intervals in the circumferential direction and distributed in the axial direction on the inner wall of the filter cartridge to form a storage trough, which can better collect impurities filtered out of the filter cartridge, prevent impurities from being scattered randomly during the filtration process, ensure that impurities rotate stably with the filter cartridge to the drop area, and improve the reliability of impurity cleaning.

[0011] Preferably, the drop-off area is located at the highest point of the filter cartridge, and the filtration area is located at the lowest point of the filter cartridge. A guide plate opposite to the inner circumferential wall of the filter cartridge is fixedly provided on the treatment pool, and the guide plate is located between the drop-off area and the filtration area. The retaining edge can be slidably connected to the guide plate to seal the opening of the storage tank.

[0012] By adopting the above technical solution, taking advantage of the height difference of the filter cartridge and the cooperation between the guide plate and the retaining edge, the opening of the storage trough is blocked during the rotation from the filtration area to the discharge area, thereby preventing large particles of impurities from being scattered midway, ensuring that the impurities can be accurately transported to the discharge area, and further improving the filtration efficiency of the emulsion and the accuracy of impurity cleaning.

[0013] Preferably, the treatment pool is provided with a vibration component located in the drop zone, the vibration component acts on the filter cartridge to generate vibration, and the filter cartridge and the vibration component are connected via a transmission component to drive the vibration component to work.

[0014] By adopting the above technical solution, a vibration component is set in the drop zone and driven by the filter cartridge through the transmission component, which can make the filter cartridge vibrate, causing large particles of impurities on the filter cartridge to fall more easily to the impurity discharge component, thereby reducing impurity residues.

[0015] Preferably, the vibration component includes a vibration rod and a vibration-generating spring. A support frame located above the filter cartridge is fixedly provided on the treatment pool. The vibration rod is slidably arranged on the support frame. One end of the vibration-generating spring is connected to the support frame, and the other end is connected to the vibration rod so as to push the vibration rod to hit the filter cartridge.

[0016] By adopting the above technical solution, the vibration spring pushes the vibration rod to hit the filter cartridge to generate vibration, so that the large particles of impurities accumulated on the filter cartridge are more likely to fall into the impurity discharge component, reducing the residue of large particles of impurities on the filter cartridge, further ensuring the continuous and effective filtration of the filter cartridge, and improving the emulsion filtration efficiency.

[0017] Preferably, the transmission assembly includes a transmission shaft and a transmission cam. The transmission shaft is rotatably connected to the support frame, and the transmission cam is fixedly arranged on the transmission shaft. The vibration rod is provided with a transmission part connected to the transmission cam. The transmission cam can push the vibration rod to squeeze the vibration generating spring to contract and disengage from the transmission part, so that the vibration generating spring can push the vibration rod to hit the filter cylinder. The filter cylinder is connected to the transmission shaft through a gear transmission mechanism.

[0018] By adopting the above technical solution, when the filter drum rotates, the gear transmission mechanism drives the transmission shaft to rotate, so that the transmission cam pushes the vibration rod to squeeze the vibration spring to contract. When the transmission cam is disengaged from the transmission part, the vibration spring pushes the vibration rod to hit the filter drum, causing the filter drum to vibrate, thereby promoting large particles of impurities in the drop zone to fall more smoothly onto the impurity discharge component.

[0019] Preferably, the impurity discharging assembly includes a conveyor belt, a rotating roller and a driving motor. A conveyor frame is fixedly provided on the processing pool. The rotating roller is rotatably connected to the conveyor frame. The conveyor belt is wound around the rotating roller and is located below the blanking area so as to be able to receive impurities. The driving motor is fixedly provided on the conveyor frame. The output shaft of the driving motor is connected to the rotating roller so as to be able to drive the rotating roller to rotate. The conveyor belt can move along the axial direction of the filter drum so as to be able to discharge impurities.

[0020] By adopting the above technical solution, the driving motor drives the rotating roller to rotate, so that the conveyor belt wrapped around the rotating roller moves along the axial direction of the filter cylinder, which can continuously receive the impurities falling from the drop zone and transport them out of the treatment tank, thereby achieving efficient discharge of impurities and avoiding the accumulation of impurities in the treatment tank and affecting the filtering effect.

[0021] Preferably, two material guide plates are fixed on the conveyor frame, and the two material guide plates are respectively located on both sides of the conveyor belt. A material guide channel extending to the drop zone is formed between the two material guide plates, and the material guide channel can guide impurities to fall onto the conveyor belt.

[0022] By adopting the above technical solution, the material guide channel can guide the impurities falling from the blanking area to accurately fall onto the conveyor belt, ensuring that the impurities can be discharged smoothly from the conveyor belt, making the impurity discharge process more stable and reliable.

[0023] A method for treating emulsion wastewater, using the emulsion wastewater treatment system, comprises the following steps: S1, pretreatment stage, the emulsion to be treated is passed into the filter area of the filter cartridge through the emulsion outlet, large particles of impurities are accumulated on the part of the filter cartridge located in the filter area, the filter cartridge rotates to transport the filtered large particles of impurities to the discharge area, the filter cartridge rotates to the position in the filter area to filter the emulsion, and the large particles of impurities rotated to the discharge area fall onto the impurity discharge component for discharge; S2, demulsification and oil-water separation, the impurities treated in step S1 are discharged The emulsion is passed into the emulsion oil separation module to destroy the emulsified oil droplets and separate the free oil and suspended matter; S3, metal particle removal, the emulsion treated in step S2 is passed into the metal particle removal module to remove dissolved / suspended metals; S4, surfactant degradation, the emulsion treated in step S3 is passed into the active agent degradation module to decompose the difficult-to-degrade surfactant; S5, deep treatment and reuse, the emulsion treated in step S4 is adsorbed with organic matter by activated carbon, and then the membrane system is used to intercept macromolecular substances, and the emulsion is disinfected by ultraviolet rays.

[0024] By adopting the above technical solution, the emulsion is first pretreated to remove large particle impurities, then the emulsion is broken to separate the oil and water, and then the metal particles are removed and the surfactant is degraded. Finally, deep treatment and reuse are carried out. This can comprehensively treat various pollutants in the emulsion wastewater, so that the treated emulsion meets the reuse standard, reduce pollution to the environment, and achieve effective utilization of resources.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. The emulsion to be processed is passed into the filtration area of the filter cartridge through the emulsion outlet. Large particles of impurities accumulate on the part of the filter cartridge located in the filtration area. The filter cartridge rotates to transport the filtered large particles of impurities to the discharge area. The filter cartridge rotates to a new position in the filtration area to filter the emulsion. The large particles of impurities that have rotated to the discharge area fall onto the impurity discharge assembly for discharge. During the process of cleaning large particles of impurities, there is no need to stop the machine to interrupt the emulsion supply, thereby improving the filtration efficiency of the emulsion; 2. Separate large particle impurities, destroy emulsified oil droplets and separate free oil and suspended matter, remove dissolved / suspended metals, decompose refractory surfactants and other treatments in sequence; 3. The filter drum rotates to transport large particles of impurities in the filter area to the discharge area. The new filter area continues to filter without stopping the machine when cleaning impurities, which speeds up the emulsion filtration speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a flow chart of an emulsion wastewater treatment system according to an embodiment of the present application.

[0027] Figure 2 It is a structural diagram showing the preprocessing module.

[0028] Figure 3 It is a top view showing the preprocessing module.

[0029] Figure 4 It is along Figure 3 Sectional view along line AA.

[0030] Figure 5 It is along Figure 3 Cross-sectional view along line BB.

[0031] Figure 6 yes Figure 2 Enlarged view of part C in the middle.

[0032] Explanation of the accompanying drawings: 1. Treatment tank; 11. Bearing seat; 2. Filter cartridge; 21. Blanking area; 22. Filter area; 23. Side guard; 24. Storage trough; 3. Impurity discharge assembly; 31. Conveyor belt; 32. Rotating roller; 33. Driving motor; 34. Conveyor rack; 35. Guide plate; 36. Guide channel; 41. Rotating motor; 42. Ring gear; 43. Driving gear; 5. Guide plate; 6. Vibration assembly; 61. Vibration rod; 611. Transmission part; 612. Hammer head; 62. Vibration generating spring; 63. Support frame; 7. Transmission assembly; 71. Transmission shaft; 72. Transmission cam; 73. Gear transmission mechanism; 731. Driven gear; 8. Emulsion outlet. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-6This application is described in further detail.

[0034] The embodiments of the present application disclose an emulsion wastewater treatment system and method.

[0035] Reference Figure 1 An emulsion wastewater treatment system includes a pretreatment module, an emulsion oil separation module, a metal particle removal module, an active agent degradation module, an advanced treatment and reuse module, and a sludge treatment module. The pretreatment module can separate large particle impurities, the emulsion oil separation module can destroy emulsified oil droplets and separate free oil and suspended matter, the metal particle removal module can remove dissolved / suspended metals, the active agent degradation module can decompose difficult-to-degrade surfactants, and the sludge treatment module treats the sludge and sediment generated during the pretreatment module, emulsion oil separation module, metal particle removal module, and active agent degradation module.

[0036] Reference Figure 2 、 Figure 3 and Figure 4 The pretreatment module includes a treatment tank 1, a filter cartridge 2, and an impurity discharge assembly 3. The treatment tank 1 is used to hold the emulsion, which is guided into the filter cartridge 2 at the opening of the treatment tank 1 through a pipe. The water outlet of the pipe is the emulsion outlet 8, which is arranged toward the bottom of the treatment tank 1. The mesh of the filter cartridge 2 has an aperture of 1-5 mm. The mesh of this embodiment has an aperture of 3 mm, corresponding to large particles of impurities with a diameter greater than 3 mm in the emulsion. The lower half of the filter cartridge 2 is embedded in the top of the treatment tank 1, and the axis of rotation of the filter cartridge 2 is coplanar with the horizontal plane. Both ends of the filter cartridge 2 are rotatably connected to the treatment tank 1 through a bearing-bearing seat 11 structure.

[0037] Reference Figure 3 、 Figure 5 The filter cartridge 2 is provided with a drop zone 21 opposite to the impurity discharge component 3 and a filtering area 22 opposite to the emulsion outlet 8. The drop zone 21 is located at the highest point of the filter cartridge 2, and the filtering area 22 is located at the lowest point of the filter cartridge 2. One end of the impurity discharge component 3 is located in the filter cartridge 2, and the other end extends out from the port at one end of the filter cartridge 2. The impurity discharge component 3 is located at one end of the filter cartridge 2 and is arranged above the emulsion outlet 8 and below the drop zone 21, so that large particles of impurities fall onto the impurity discharge component 3, and the impurity discharge component 3 moves the fallen large particles of impurities out of the filter cartridge 2, completing the discharge and collection of large particles of impurities. The filter cartridge 2 can rotate to transport the large particles of impurities in the filtering area 22 to the drop zone 21, so that the large particles of impurities can be transferred from the filtering area 22 to the drop zone 21, and the part of the filter cartridge 2 that has newly entered the filtering area 22 continues to filter the emulsion, so that the large particles of impurities accumulate on the filter cartridge 2.

[0038] The emulsion to be treated is introduced into the filtration area 22 of the filter cartridge 2 through the emulsion outlet 8, and large particles of impurities accumulate on the portion of the filter cartridge 2 located in the filtration area 22. The filter cartridge 2 rotates to transport the filtered large particles of impurities to the discharge area 21, and the filter cartridge 2 rotates to a new position in the filtration area 22 to filter the emulsion. The large particles of impurities that are rotated to the discharge area 21 fall onto the impurity discharge component 3 for discharge. In the process of cleaning the large particles of impurities, there is no need to stop the machine to interrupt the emulsion supply, thereby improving the filtration efficiency of the emulsion.

[0039] Reference Figure 2 A rotating motor 41 is fixedly provided on the treatment pool 1. The axis of the output shaft of the rotating motor 41 is arranged parallel to the axis of the filter cartridge 2. A ring gear 42 is fixedly provided at one end of the filter cartridge 2. The ring gear 42 is arranged along the circumference of the filter cartridge 2. A driving gear 43 is coaxially fixed on the output shaft of the rotating motor 41. The driving gear 43 is externally meshed with the ring gear 42, so that the rotating motor 41 can drive the filter cartridge 2 to rotate.

[0040] Reference Figure 3 、 Figure 5 A plurality of ribs 23 are fixedly provided on the inner circumferential wall of the filter cartridge 2, and the width direction of each rib 23 is in the same direction as the radial direction of the filter cartridge 2. The plurality of ribs 23 are evenly spaced along the circumference of the inner circumferential wall of the filter cartridge 2, and each rib 23 is arranged along the axial direction of the filter cartridge 2, so that a storage groove 24 is formed between two adjacent ribs 23. When the part of the filter cartridge 2 located in the filter area 22 filters the impurities in the emulsion, the impurities filtered out by the filter cartridge 2 can be accumulated in the storage groove 24, which can better collect the impurities filtered out by the filter cartridge 2, avoid the impurities from being scattered at will during the filtration process, ensure that the impurities rotate stably with the filter cartridge 2 to the drop area 21, and improve the reliability of impurity cleaning.

[0041] Reference Figure 3 、 Figure 5 A guide plate 5 is fixedly provided on the treatment tank 1, facing the inner circumferential wall of the filter cartridge 2. The guide plate 5 is located between the discharge area 21 and the filtration area 22. The guide plate 5 is a sector-shaped plate concentric with the center of the filter cartridge 2. There are two guide plates 5, which are arranged opposite to each other in the circumferential direction of the filter cartridge 2. A distance of the width of a rib 23 is left between the outer wall of each guide plate 5 and the inner wall of the filter cartridge 2, so that the rib 23 and the guide plate 5 are in close contact and sliding connection, thereby blocking the opening of the storage trough 24. The cooperation between the guide plate 5 and the rib 23 blocks the opening of the storage trough 24 during the rotation from the filtration area 22 to the discharge area 21, preventing large particles of impurities from being scattered midway and ensuring that the impurities are accurately transported to the discharge area 21, further improving the filtration efficiency of the emulsion and the accuracy of impurity removal.

[0042] Reference Figure 2 、 Figure 6 A vibration assembly 6 is provided on the treatment pool 1 in the blanking area 21. The vibration assembly 6 acts on the filter cartridge 2 to generate vibration. The filter cartridge 2 and the vibration assembly 6 are connected by a transmission assembly 7 to drive the vibration assembly 6 to work.

[0043] Reference Figure 2 、 Figure 6 The vibration components 6 are arranged in multiple groups along the axial direction of the filter cartridge 2, and each group of vibration components 6 includes a vibration rod 61 and a vibration spring 62. A support frame 63 is fixed on the two bearing seats 11, and the support frame 63 is located above the filter cartridge 2. The vibration rod 61 includes a transmission part 611 and a hammer head 612. The transmission part 611 is "L"-shaped. The transmission part 611 is vertically penetrated on the support frame 63 and is slidably connected with the support frame 63. The hammer head 612 is located below the transmission part 611, and the vibration spring 62 is sleeved on the transmission part 611 and located between the support frame 63 and the hammer head 612. One end of the vibration spring 62 abuts against the support frame 63, and the other end abuts against the support frame 63. When the compressed vibration spring 62 returns to its original shape, it pushes the hammer head 612 to hit the filter cartridge 2, causing the filter cartridge 2 to vibrate, and vibrating the large particles of impurities attached to the filter cartridge 2 to fall onto the impurity discharging component 3.

[0044] Reference Figure 2 、 Figure 6 The transmission assembly 7 in this embodiment includes a transmission shaft 71 and a transmission cam 72. The transmission shaft 71 is arranged above the filter cartridge 2 along the axial direction of the filter cartridge 2. The two ends of the transmission shaft 71 are respectively rotatably connected to the bearing seat 11 on the same side. The filter cartridge 2 is connected to the transmission shaft 71 via a gear transmission mechanism 73. The gear transmission mechanism 73 in this embodiment includes a driven gear 731. The driven gear 731 is coaxially fixed to the transmission shaft 71. The driven gear 731 is externally meshed with the ring gear 42, so that the filter cartridge 2 drives the transmission shaft 71 to rotate. The transmission cam 72 corresponds to the vibration rod 61 one-to-one. The transmission cam 72 is fixed to the transmission shaft 71 so that the center of the base circle of the transmission cam 72 is colinear with the axis of the transmission shaft 71. The end of the transmission portion 611 away from the hammer head 612 is located above the transmission cam 72.

[0045] When the transmission cam 72 pushes the vibration rod 61, the pushing section of the transmission cam 72 pushes the transmission part 611 to rise. At this time, the vibration spring 62 is compressed. When the transmission cam 72 pushes the transmission part 611 to the highest point, the transmission cam 72 disengages from the transmission part 611, and the vibration spring 62 pushes the transmission part 611 downward, so that the hammer head 612 hits the filter cartridge 2. The vibration spring 62 pushes the vibration rod 61 to hit the filter cartridge 2 to generate vibration, so that the large particles of impurities accumulated on the filter cartridge 2 are more likely to fall to the impurity discharge component 3, thereby reducing the residue of large particles of impurities on the filter cartridge 2, further ensuring the continuous and effective filtration of the filter cartridge 2, and improving the emulsion filtration efficiency.

[0046] Reference Figure 3 、 Figure 4 and Figure 5 The impurity discharge assembly 3 in this embodiment includes a conveyor belt 31, rotating rollers 32, and a drive motor 33. A conveyor frame 34 is fixedly provided on the processing tank 1. One end of the conveyor frame 34 is located within the filter cartridge 2, and the other end extends outside the filter cartridge 2. There are two rotating rollers 32, which are rotatably mounted on both ends of the conveyor frame 34. The conveyor belt 31 is wrapped around the two rotating rollers 32, so that the rotating rollers 32 drive the conveyor belt 31 to rotate and move the impurities on the conveyor belt 31. The drive motor 33 is fixedly provided on the conveyor frame 34. The output shaft of the drive motor 33 is connected to the rotating rollers 32, driving the rotating rollers 32 to rotate. The drive motor 33 drives the rotating rollers 32 to rotate, causing the conveyor belt 31 wrapped around the rotating rollers 32 to move along the axial direction of the filter cartridge 2. The conveyor belt 31 can continuously receive impurities dropped from the drop zone 21 and transport them out of the processing tank 1, thereby achieving efficient impurity discharge and preventing impurities from accumulating in the processing tank 1 and affecting the filtration effect.

[0047] Reference Figure 3 、 Figure 5 Two guide plates 35 are fixed on the conveyor frame 34. The two guide plates 35 are respectively located on both sides of the conveyor belt 31 and are located in the filter cylinder 2. A guide channel 36 extending to the blanking area 21 is formed between the two guide plates 35. The large particles of material falling from the blanking area 21 are guided along the guide channel 36 to fall onto the conveyor belt 31. The guide channel 36 can guide the impurities falling from the blanking area 21 to fall accurately onto the conveyor belt 31, ensuring that the impurities can be discharged smoothly from the conveyor belt 31, making the impurity discharge process more stable and reliable.

[0048] The implementation principle of an emulsion wastewater treatment system in an embodiment of the present application is: the emulsion wastewater is subjected to pretreatment, emulsion oil separation, metal particle removal and active agent degradation treatment in sequence; the pretreatment module can separate large-particle impurities, and the filter cylinder 2 rotates to transport the large-particle impurities from the filter area 22 to the discharge area 21 without stopping to interrupt the emulsion supply, so that the filtration system maintains a continuous and effective operating time, thereby improving the emulsion filtration efficiency, and at the same time the impurity discharge component 3 can collect and discharge large-particle impurities.

[0049] A method for treating emulsion wastewater comprises the following steps: S1. Preprocessing stage The emulsion to be treated is passed into the filtration area 22 of the filter drum 2 through the emulsion outlet 8. Large particles of impurities accumulate on the portion of the filter drum 2 located in the filtration area 22. The filter drum 2 rotates to transport the filtered large particles of impurities to the discharge area 21. The filter drum 2 rotates to a new position in the filtration area 22 to filter the emulsion. The large particles of impurities that have rotated to the discharge area 21 fall onto the conveyor belt 31. The conveyor belt 31 removes the large particles of impurities from the filter drum 2 for discharge. Treatment pool 1 is connected to an external pH adjustment tank, and the pH is adjusted to the optimal demulsification range of pH 9-11 through an automatic dosing system (sulfuric acid / sodium hydroxide).

[0050] S2, demulsification and oil-water separation The emulsion treated in step S1 is passed into an emulsion oil separation module to destroy emulsified oil droplets and separate free oil and suspended matter; The emulsion oil separation module includes: Chemical demulsification reaction tank: add demulsifier alkali and be equipped with static mixer.

[0051] Dissolved Air Flotation (DAF): This machine uses micro-bubbles to adhere to oil droplets and float them upwards. It includes a dissolved air pump, a pressure tank, and a scraper.

[0052] Inclined plate grease trap: uses gravity to separate free oil and is equipped with an oil collection tank and oil skimmer.

[0053] S3. Metal particle removal The emulsion treated in step S2 is passed into a metal particle removal module to remove dissolved / suspended metals.

[0054] The Metal Particle Removal Module includes: Chemical precipitation tank: NaOH is added to form metal hydroxide precipitation, equipped with pH / ORP online monitor.

[0055] Multi-media filter: Quartz sand + anthracite filter layer removes suspended metal particles.

[0056] S4. Surfactant degradation The emulsion treated in step S3 is passed into the surfactant degradation module to decompose the difficult-to-degrade surfactant.

[0057] The active agent degradation module includes: Biological treatment unit: Activated sludge reaction tank: aeration system (Roots blower + microporous aeration head) promotes microbial degradation.

[0058] Advanced Oxidation System: Ozone oxidation tower: ozone generator (10-20mg / L dosage) + contact reaction tower; Fenton reactor: H2O2+Fe²⁺ catalytic oxidation of refractory organic matter.

[0059] S5. Advanced processing and reuse The emulsion treated in step S4 is subjected to organic matter adsorption by activated carbon, and then the macromolecular substances are intercepted by a membrane system, and then the emulsion is disinfected by ultraviolet rays.

[0060] The deep processing and reuse module includes: Activated carbon adsorption tower: Granular activated carbon (GAC) or powdered activated carbon (PAC) adsorbs residual organic matter.

[0061] Ultrafiltration / nanofiltration membrane system: intercepts large molecular substances (membrane pore size 0.01-0.1μm).

[0062] Ultraviolet sterilizer: 254nm ultraviolet light kills pathogens.

[0063] sludge treatment The sediment in S1-S4 is passed into the sludge treatment module for concentration, dehydration and harmless disposal.

[0064] The sludge treatment module includes: Sludge thickening tank: Gravity thickening reduces sludge volume.

[0065] Plate and frame filter press / centrifugal dehydrator: reduces the sludge moisture content to 60-80%.

[0066] Sludge drying bed: natural drying for further dehydration.

[0067] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An emulsion wastewater treatment system, characterized by: It includes a pretreatment module, an emulsion oil separation module, a metal particle removal module, and an active agent degradation module. The pretreatment module can separate large impurities, the emulsion oil separation module can destroy emulsified oil droplets and separate free oil and suspended matter, the metal particle removal module can remove dissolved / suspended metals, and the active agent degradation module can decompose refractory surfactants. The pretreatment module comprises a treatment tank (1), a filter cartridge (2), and an impurity discharge assembly (3). The treatment tank (1) is used to hold emulsion. The filter cartridge (2) is provided with a drop zone (21) opposite to the impurity discharge assembly (3) and a filter zone (22) opposite to the emulsion outlet (8). The filter cartridge (2) is capable of transporting large particles of impurities in the filter zone (22) to the drop zone (21). The impurity discharge assembly (3) is lower than the portion of the filter cartridge (2) located in the drop zone (21) so that large particles of impurities can fall onto the impurity discharge assembly (3). The impurity discharge assembly (3) is capable of collecting large particles of impurities. The emulsion outlet (8) is higher than the portion of the filter cartridge (2) located in the filter zone (22) so that large particles of impurities can accumulate on the filter cartridge (2).

2. The emulsion wastewater treatment system according to claim 1, characterized in that: The filter cartridge (2) is rotatably mounted on the treatment tank (1), and the rotation axis of the filter cartridge (2) is coplanar with a horizontal plane. A rotating motor (41) is fixedly mounted on the treatment tank (1), and the rotating motor (41) is connected to the filter cartridge (2) so as to be able to drive the filter cartridge (2) to rotate.

3. The emulsion wastewater treatment system according to claim 1, characterized in that: A plurality of ribs (23) are fixedly provided on the inner peripheral wall of the filter cartridge (2), and the plurality of ribs (23) are arranged at intervals along the circumferential direction of the inner peripheral wall of the filter cartridge (2). Each rib (23) is arranged along the axial direction of the filter cartridge (2), and a storage trough (24) is formed between two adjacent ribs (23). Impurities filtered out by the filter cartridge (2) can be accumulated in the storage trough (24).

4. The emulsion wastewater treatment system according to claim 3, characterized in that: The drop zone (21) is located at the highest point of the filter cartridge (2), and the filtration zone (22) is located at the lowest point of the filter cartridge (2). A guide plate (5) is fixedly provided on the treatment tank (1) and is opposite to the inner peripheral wall of the filter cartridge (2). The guide plate (5) is located between the drop zone (21) and the filtration zone (22). The retaining edge (23) can be slidably connected to the guide plate (5) to seal the opening of the storage tank (24).

5. The emulsion wastewater treatment system according to claim 1, characterized in that: The treatment pool (1) is provided with a vibration component (6) located in the drop zone (21), and the vibration component (6) acts on the filter cartridge (2) to generate vibration. The filter cartridge (2) and the vibration component (6) are connected via a transmission component (7) to drive the vibration component (6) to work.

6. The emulsion wastewater treatment system according to claim 5, characterized in that: The vibration assembly (6) includes a vibration rod (61) and a vibration-generating spring (62). A support frame (63) located above the filter cartridge (2) is fixedly provided on the treatment tank (1). The vibration rod (61) is slidably arranged on the support frame (63). One end of the vibration-generating spring (62) is connected to the support frame (63), and the other end is connected to the vibration rod (61) so as to be able to push the vibration rod (61) to collide with the filter cartridge (2).

7. The emulsion wastewater treatment system according to claim 6, characterized in that: The transmission assembly (7) comprises a transmission shaft (71) and a transmission cam (72); the transmission shaft (71) is rotatably connected to the support frame (63); the transmission cam (72) is fixedly arranged on the transmission shaft (71); the vibration rod (61) is provided with a transmission part (611) connected to the transmission cam (72); the transmission cam (72) can push the vibration rod (61) to squeeze the vibration generating spring (62) to contract, and is separated from the transmission part (611), so that the vibration generating spring (62) can push the vibration rod (61) to hit the filter cartridge (2); the filter cartridge (2) is connected to the transmission shaft (71) via a gear transmission mechanism (73).

8. The emulsion wastewater treatment system according to claim 1, characterized in that: The impurity discharging assembly (3) comprises a conveyor belt (31), a rotating roller (32) and a driving motor (33); a conveyor frame (34) is fixedly provided on the processing tank (1); the rotating roller (32) is rotatably connected to the conveyor frame (34); the conveyor belt (31) is wound around the rotating roller (32) and is located below the material drop zone (21) so as to be able to receive impurities; the driving motor (33) is fixedly provided on the conveyor frame (34); the output shaft of the driving motor (33) is connected to the rotating roller (32) so as to be able to drive the rotating roller (32) to rotate; the conveyor belt (31) can move along the axial direction of the filter drum (2) so as to be able to discharge impurities.

9. The emulsion wastewater treatment system according to claim 8, characterized in that: Two guide plates (35) are fixedly provided on the conveyor frame (34). The two guide plates (35) are respectively located on both sides of the conveyor belt (31). A guide channel (36) extending to the drop zone (21) is formed between the two guide plates (35). The guide channel (36) can guide impurities to fall onto the conveyor belt (31).

10. A method for treating emulsion wastewater, using the emulsion wastewater treatment system according to any one of claims 1 to 9, characterized in that: The steps include: S1, pretreatment stage, the emulsion to be treated is passed into the filter area (22) of the filter cartridge (2) through the emulsion outlet, large particles of impurities are accumulated on the portion of the filter cartridge (2) located in the filter area (22), the filter cartridge (2) rotates to transport the filtered large particles of impurities to the discharge area (21), the filter cartridge (2) is rotated to a new portion in the filter area (22) to filter the emulsion, and the large particles of impurities that have rotated to the discharge area (21) fall onto the impurity discharge assembly (3) for discharge; S2, demulsification and oil-water separation, the emulsion treated in step S1 is passed into the emulsion oil separation module to destroy the emulsified oil droplets and separate the free oil and suspended matter; S3, metal particle removal, passing the emulsion treated in step S2 into a metal particle removal module to remove dissolved / suspended metals; S4, surfactant degradation, passing the emulsion treated in step S3 into the surfactant degradation module to decompose the refractory surfactant; S5, deep treatment and reuse, using activated carbon to adsorb organic matter from the emulsion treated in step S4, then using a membrane system to intercept macromolecular substances, and then disinfecting the emulsion with ultraviolet rays.

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