Oil-containing heavy metal industrial wastewater treatment system

Abstract

The invention relates to the technical field of wastewater treatment, in particular to an oil-containing heavy metal industrial wastewater treatment system. Comprising an adsorption bin, a water inlet, a water outlet, a stirring rod, a stirring motor, a motor shell and an adsorption fiber ball, a water inlet is formed in the left side of the adsorption bin, and a water outlet is formed in the right side of the adsorption bin; a stirring rod is rotationally mounted in the center of the interior of the adsorption bin, and one end of the stirring rod penetrates through the adsorption bin and is fixedly connected with an output shaft of a stirring motor; the stirring motor is fixedly mounted on the bottom surface of the adsorption mechanism; a motor shell is fixedly mounted outside the stirring motor; under the action of centrifugal force of high-speed rotation, the adsorption fiber balls can be thrown out, and the feeding work of the adsorption unit is completed; the problem that the adsorption fiber balls need to be manually thrown is solved, automatic throwing of the adsorption fiber balls is achieved, a large amount of manpower and material resources are saved, and the working efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and more specifically to a system for treating oily heavy metal industrial wastewater. Background Technology

[0002] Heavy metal wastewater refers to wastewater containing heavy metals discharged during industrial production processes such as mining, metallurgy, machinery manufacturing, chemical engineering, electronics, and instrumentation. Heavy metal wastewater (containing elements such as cadmium, nickel, mercury, and zinc) is among the most serious pollutants and poses the greatest threat to human health. Its quality and quantity are related to the production process. Heavy metals in wastewater generally cannot be decomposed or destroyed; they can only be relocated or their physical and chemical forms changed. Treatment methods include first reforming production processes to reduce or eliminate the use of highly toxic heavy metals, and then treating the wastewater on-site (e.g., not discharging it from the production workshop). Common methods include chemical precipitation and ion exchange. After treatment, if the heavy metal content in the water is below discharge standards, it can be discharged or reused. New concentrated heavy metal products should be recovered and reused or subjected to harmless treatment as much as possible.

[0003] Oily wastewater refers to wastewater containing lipids (fatty acids, soaps, fats, waxes, etc.) and various oils (mineral oils, animal and vegetable oils). Oily wastewater is characterized by high COD and BOD, a certain odor and color, flammability, and easy oxidation and decomposition. It is generally lighter than water and poorly soluble in water. Oily wastewater is a large-scale, widespread, and seriously harmful type of industrial wastewater; therefore, its harmless treatment is of paramount importance.

[0004] In the treatment of industrial wastewater containing oil and heavy metals, two main principles are employed: physical oil removal and chemical oil removal. Physical oil removal separates and removes oil from water through physical processes; chemical oil removal removes or recycles oil from water through chemical reactions. Both methods aim to reduce the oil content in the wastewater to a dischargeable level, and various methods can be used to achieve this. One method is sedimentation separation, which utilizes the density difference between the oil and water phases and the immiscibility of oil and water. This is a primary treatment method. Sedimentation separation is carried out in oil separators, commonly of various types such as horizontal flow, parallel plate, and corrugated plate. The design of horizontal flow oil separators is primarily based on Stokes' theorem, which allows calculation of the minimum oil droplet diameter that can be removed from an oil separator with a given surface area. The flow state of the oil separator significantly impacts its oil removal capacity and effectiveness. The optimal flow state is laminar flow, which facilitates the rise of oil droplets and the sedimentation of solids. Secondly, adsorption can be used, employing porous solid adsorbents to adsorb dissolved oil and other dissolved organic matter from oily wastewater. Commonly used adsorbents include modified bentonite, sulfonated coal, spent activated carbon, crushed coke, and organic fibers—all readily available raw materials. Thirdly, filtration can remove oil from water using granular media filter beds. This method utilizes mechanisms such as interception, inertial collision, sieving, surface adhesion, and aggregation to remove oil, and is generally used for secondary or advanced treatment. Common granular media filter media include quartz sand, anthracite, glass fiber, and polymers.

[0005] However, existing technologies often employ a single treatment method, resulting in incomplete treatment of oily heavy metal industrial wastewater. Furthermore, existing adsorption technologies typically involve manually adding adsorption fiber balls, which presents two problems: firstly, manual addition of the adsorption fiber balls is required; secondly, manual removal of the adsorption fiber balls is necessary after adsorption. This necessitates a person constantly monitoring the adsorption unit for both adding and removing materials, leading to significant waste of manpower and resources. Moreover, existing technologies for recovering adsorption fiber balls typically involve draining the water from the adsorption tank before manually retrieving them. Because the adsorption balls are randomly distributed within the tank, recovery is often time-consuming and cumbersome.

[0006] Sumitomo Electric Industries, Ltd. has invented an oily wastewater treatment system (application number: CN201280004398.5, publication date: 2015-01-07). This system simplifies the apparatus used in the system by effectively combining the differences in the various processes used in the oily wastewater treatment system. Its structure includes: a separation tank, in which oil is separated by flotation, which is arranged in the supply path of the raw water serving as oily wastewater; a membrane filter tank, which is arranged downstream of the separation tank and includes a membrane separation component, which includes a hollow fiber membrane or a flat sheet membrane, and the membrane filter tank also includes a diffuser for generating bubbles, which is arranged below the membrane separation component; a supply pipe, which supplies raw water from the separation tank to the membrane filter tank via a circulation pump; and a return pipe, which returns unfiltered water containing oil and bubbles from the membrane filter tank to the separation tank.

[0007] Therefore, the present invention provides an oil-containing heavy metal industrial wastewater treatment system, which can improve the above-mentioned problems. Summary of the Invention

[0008] The technical problem to be solved by this invention is as follows: With the continuous progress of industry, there is an increasing amount of oily heavy metal industrial wastewater that needs to be treated. At this time, when using the adsorption method to treat oily industrial wastewater, the manual placement of fiber balls can no longer meet the current industrial needs. The manual placement of fiber balls will lead to an excessively long industrial wastewater treatment cycle. At the same time, the manual collection of fiber balls after treatment will also lead to a cumbersome collection process, thereby reducing the efficiency of industrial wastewater treatment and wasting a lot of manpower and resources.

[0009] This invention provides the following technical solution: a system for treating oily heavy metal industrial wastewater, wherein an adsorption chamber is fixedly installed on a support frame; the adsorption chamber can adsorb the heavy metal industrial wastewater after sedimentation and separation, that is, it can further treat the oil in the heavy metal industrial wastewater to meet the prescribed discharge standards; an inlet is provided on the left side of the adsorption chamber, and the inlet is circular; when it is necessary to move the heavy metal industrial wastewater from the sedimentation unit to the adsorption unit, the water flows through the inlet into the adsorption unit; an outlet is provided on the right side of the adsorption chamber; a solenoid valve is installed inside the outlet; a stirring rod is rotatably installed in the center of the adsorption chamber, because... The adsorption fiber balls move freely within the adsorption unit, so a stirring rod is needed to ensure uniform adsorption within the unit. Furthermore, the stirring action of the rod also facilitates the rapid separation of heavy metal industrial wastewater from oil. One end of the stirring rod passes through the adsorption chamber and is fixedly connected to the output shaft of the stirring motor. The stirring motor is fixedly mounted on the bottom surface of the adsorption unit. A motor housing is fixedly installed on the outside of the stirring motor. Since this type of wastewater treatment system is generally large, a high-power motor is required for operation. Placing the stirring motor at the bottom of the adsorption unit allows for better space utilization. The adsorption chamber contains the adsorption fiber balls.

[0010] The sedimentation tank is fixedly installed on the support. Since the function of the sedimentation tank is to separate oil and water in the oily heavy metal industrial wastewater, the separated oil needs to be collected. Therefore, a moving track and a push plate are installed on the top of the sedimentation unit. The push plate pushes the separated oil into the collection tank. That is, the moving track is fixedly installed on both sides of the sedimentation tank, the push plate is slidably installed on the moving track, and rollers are fixedly installed around the push plate. The rollers are slidably installed on the moving track. A moving motor is fixedly installed above the push plate. The collection tank is fixedly installed on the left side of the push plate.

[0011] The stirring rod is cylindrical with a hollow interior. Three extension arms are installed on both sides of the stirring rod. These extension arms are designed to work with the stirring rod to evenly distribute the adsorption fiber balls in the wastewater within the adsorption chamber during rotation. The upper extension arm 541 and the lower extension arm 542 are designed as closed structures so that they are used only for stirring. The discharge extension arm is designed as a hollow structure to connect to the main body of the stirring rod, allowing the adsorption fiber balls to be added from inside the stirring rod into the adsorption chamber.

[0012] Although the aforementioned stirring rod can solve the problem of automatic feeding, in actual operation, the accumulation of adsorbent fiber balls inside the stirring rod can cause blockage, leading to the adsorption unit stopping working. Therefore, a pusher motor is fixedly installed inside the stirring rod, and a cross-shaped pusher plate is fixedly installed at the output end of the pusher motor. The cross-shaped pusher plate corresponds to the discharge extension arm. The advantage of this is that during the high-speed rotation of the stirring rod, since the pusher motor and the cross-shaped pusher plate are installed inside the stirring rod, they remain stationary relative to the cross-shaped pusher plate at all times. Therefore, during the rotation of the stirring rod, the control unit can control the pusher motor to rotate periodically, which in turn allows the cross-shaped pusher plate to move periodically. When the cross-shaped pusher plate moves periodically, it can periodically push the adsorbent fiber balls into the discharge extension arm, where they are then thrown into the adsorption chamber by centrifugal force.

[0013] Since the adsorption chamber is used to treat industrial wastewater after sedimentation and separation, it needs to be cleaned regularly to prevent scale buildup from waste from affecting the operation of the adsorption unit during long-term operation. Therefore, a stirring rod is slidably installed inside the upper and lower extension arms, and the stirring rod is a solid structure. A discharge rod is fixedly installed inside the discharge extension arm. Springs are symmetrically fixed to the stirring rod and the discharge rod with respect to the upper, lower, and discharge extension arms.

[0014] After the stirring rod agitates, the adsorbent fiber balls need to be collected. Therefore, an inner liner 511 is fixedly installed inside the adsorption chamber. The inner liner 511 is equipped with a spiral water inlet array. This divides the adsorption chamber into two areas. During the stirring process, the adsorbent fiber balls will enter the area between the inner liner 511 and the adsorption chamber through the spiral water inlet. After the stirring chamber stops agitating, the adsorbent fiber balls can be collected between the adsorption chamber and the inner liner 511.

[0015] Because the aforementioned mechanism gathers the adsorbent fiber balls in the area between the inner liner 511 and the adsorption chamber, filter bags are slidably installed at the four corners of the inner liner 511, and the inner liner 511 has through holes at the filter bags. In this way, the water flow will carry the adsorbent fiber balls into the filter bags through the through holes in the area between the inner liner 511 and the adsorption chamber, thus allowing all the adsorbent fiber balls to gather in the filter bags. At the same time, because the filter bags are slidably installed at the four corners of the inner liner 511, the adsorbent fiber balls can be collected by removing the filter bags after the stirring stops.

[0016] As the stirring rod stops rotating, the speed of the stirring rod gradually decreases, causing water in the adsorption chamber to flow into the lower extension arm 542. Therefore, an automatic sliding cover is fixedly installed at the end of the discharge movable rod, and a sealing strip is fixedly installed on the automatic sliding cover. In this way, as the stirring rod decelerates, the control unit can control the automatic sliding cover to close, and at the same time, due to the presence of the sealing strip, the water in the adsorption chamber will be isolated outside the lower extension arm 542.

[0017] Multiple adsorption fiber balls are coated with a water-soluble membrane made of polyvinyl alcohol. The diameter of the stirring rod and the extension arm is doubled, so that the adsorption fiber balls can be fed into the adsorption unit more quickly than one adsorption fiber ball at a time. When a bag of adsorption fiber balls is thrown into the adsorption chamber, the water-soluble membrane made of polyvinyl alcohol melts, and the adsorption fiber balls disperse in the water for adsorption.

[0018] The beneficial effects of this invention are as follows:

[0019] 1. This invention designs a hollow stirring rod. By moving the adsorbent fiber balls from inside the stirring rod to the discharge extension arm, and with the stirring rod rotating at high speed, the discharge extension arm can throw out the adsorbent fiber balls under the action of centrifugal force, thus completing the feeding work of the adsorption unit. This avoids the problem of manually feeding the adsorbent fiber balls, realizes the automatic feeding of adsorbent fiber balls, saves a lot of manpower and material resources, and improves work efficiency.

[0020] 2. This invention divides the adsorption chamber into two areas by adding an inner liner 511 inside the adsorption chamber. A spiral water inlet is added inside the inner liner 511, and filter bags are slidably installed around the inner liner 511. This allows the adsorption fiber balls to enter the area between the inner liner 511 and the adsorption chamber through the spiral water inlet during the stirring process. Because of the filter bags slidably installed around the inner liner 511, water from the area between the inner liner 511 and the adsorption chamber returns to the inner liner 511 through the through-holes. This water flow carries the adsorption fiber balls into the filter bags, allowing them to gather completely within the filter bags. Furthermore, since the filter bags are slidably installed at the four corners of the inner liner 511, the adsorption fiber balls can be collected by removing the filter bags after stirring stops. This makes the collection of adsorption fiber balls very convenient. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is an overall schematic diagram of the present invention;

[0023] Figure 2 This is a schematic diagram of the adsorption unit of the present invention;

[0024] Figure 3 This is a schematic diagram of the internal structure of the adsorption unit of the present invention;

[0025] Figure 4 This is a schematic diagram of the precipitation unit of the present invention;

[0026] Figure 5 This is a schematic diagram of the stirring rod of the present invention;

[0027] Figure 6 This is a schematic diagram of the cross-shaped pusher plate of the present invention;

[0028] Figure 7 This is a schematic diagram of the pusher motor of the present invention;

[0029] Figure 8 This is a schematic diagram of the spring position according to the present invention;

[0030] Figure 9 This is a schematic diagram of the inner liner 511 of the present invention;

[0031] Figure 10 This is a schematic diagram of the automatic sliding cover of the present invention;

[0032] Figure 11 This is a schematic diagram of the sealing strip of the present invention;

[0033] Figure 12 This is a schematic diagram of the water-soluble membrane of the present invention.

[0034] In the diagram: 1. Support; 2. Control unit; 3. Sedimentation unit; 31. Sedimentation chamber; 32. Moving track; 33. Push plate; 34. Roller; 35. Collection chamber; 4. Water pump; 5. Adsorption unit; 51. Adsorption chamber; 511 Inner liner; 512. Spiral inlet; 513. Filter bag; 52. Inlet; 53. Outlet; 54. Stirring rod; 541. Upper extension arm; 542. Lower extension arm; 543. Discharge extension arm; 544. Pushing motor; 545. Cross-shaped push plate; 546. Stirring rod; 547. Discharge rod; 548. Spring; 55. Stirring motor; 56. Motor housing; 57. Adsorption fiber ball; 6. Filter unit; 7. Automatic sliding cover; 71. Sealing strip; 8. Water-soluble membrane. Detailed Implementation

[0035] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0036] First Implementation Method

[0037] Figure 1 The diagram shows the overall design of an oil-containing heavy metal industrial wastewater treatment system. In the diagram, the left side is defined as the front end of the oil-containing heavy metal industrial wastewater treatment system, and the right side is defined as the rear end of the system.

[0038] like Figures 1 to 11 As shown, the support frame 1 is fixedly installed on the ground, providing support for the entire wastewater treatment system; the control unit 2 is fixedly installed on the support frame 1, controlling the entire wastewater treatment system; the sedimentation unit 3 is fixedly installed on the support frame 1, sedimentation unit 3 sediments and separates oil from wastewater, collecting the oil; the water pump 4 is fixedly installed to the right of the sedimentation unit 3, pumping water from the right side of the sedimentation unit 3 to the adsorption unit 5; the adsorption unit 5 is fixedly installed to the right of the water pump 4, adsorbing remaining oil onto a carrier and collecting it; the filter unit 6 is fixedly installed to the right of the adsorption unit 5, filtering remaining impurities in the wastewater; the water pump 4 is fixedly installed between the filter unit 6 and the adsorption unit 5.

[0039] The treatment process employs a multi-stage approach: first, sedimentation separation is used to separate most of the oil from the water; then, adsorption is used to adsorb the oil in the industrial wastewater onto a carrier. This effectively removes the oil from the heavy metal industrial wastewater. However, existing technologies typically rely on manual placement of adsorption fiber balls 57, which presents two problems: first, manual placement of the adsorption fiber balls 57 is required; second, manual removal of the adsorption fiber balls 57 is necessary after adsorption. Consequently, one person needs to be present at the adsorption unit 5 for an extended period. In contrast, the aforementioned oily heavy metal industrial wastewater treatment system allows for automatic placement of the adsorption fiber balls 57 and automatic removal of the adsorption-completed fiber balls.

[0040] like Figures 2 to 11 As shown, an adsorption chamber 51 is fixedly installed on the support 1. The adsorption chamber 51 can adsorb the heavy metal industrial wastewater after sedimentation and separation, that is, it can further treat the oil pollution in the heavy metal industrial wastewater to meet the prescribed discharge standards. The adsorption chamber 51 has an inlet 52 on the left side, and the inlet 52 is circular. When it is necessary to move the heavy metal industrial wastewater from the sedimentation unit 3 to the adsorption unit 5, the water flows through the inlet 52 into the adsorption unit 5. The adsorption chamber 51 has an outlet 53 on the right side. A solenoid valve is installed inside the outlet 53. A stirring rod 54 is rotatably installed in the center of the adsorption chamber 51. Since the adsorption fiber balls 57 are inside the adsorption unit 5... Since it is freely movable, the stirring rod 54 is needed to stir it to ensure that the adsorption fiber balls 57 are evenly adsorbed within the adsorption unit 5. Furthermore, the stirring action of the stirring rod 54 can also rapidly separate heavy metal industrial wastewater from oil. One end of the stirring rod 54 passes through the adsorption chamber 51 and is fixedly connected to the output shaft of the stirring motor 55. The stirring motor 55 is fixedly installed on the bottom surface of the adsorption unit 5. A motor housing 56 is fixedly installed outside the stirring motor 55. Generally, this type of wastewater treatment system is relatively large, therefore a high-power motor is required for driving it. Therefore, placing the stirring motor 55 at the bottom of the adsorption unit 5 can better utilize the space. The adsorption chamber 51 contains the adsorption fiber balls 57.

[0041] The adsorption unit 5 described above can make the adsorption of the adsorption fiber balls 57 more uniform. At the same time, the stirring unit can promote the separation of heavy metal industrial wastewater and oil. By using the adsorption fiber balls 57 to adsorb oil in the oily heavy metal industrial wastewater, the oil content in the oily industrial wastewater can be reduced to 1 mg / L. This meets the discharge standards and can be discharged, thus avoiding irreversible pollution to the environment caused by excessive oil content in industrial wastewater.

[0042] like Figure 4As shown, the sedimentation tank 31 is fixedly installed on the support 1. Since the function of the sedimentation tank 31 is to separate oil and water in the oily heavy metal industrial wastewater, the separated oil needs to be collected. Therefore, a moving track 32 and a push plate 33 are installed on the top of the sedimentation unit 3. The push plate 33 pushes the separated oil into the collection tank 35. That is, the moving track 32 is fixedly installed on both sides of the sedimentation tank 31, the push plate 33 is slidably installed on the moving track 32, and rollers 34 are fixedly installed around the push plate 33. The rollers 34 are slidably installed on the moving track 32. A moving motor is fixedly installed above the push plate 33. The collection tank 35 is fixedly installed on the left side of the push plate 33.

[0043] like Figure 5 As shown, the stirring rod 54 is a cylinder with a hollow interior. Three extension arms are installed on both sides of the stirring rod 54. The extension arms are designed to work with the stirring rod 54 to evenly distribute the adsorption fiber balls 57 in the wastewater within the adsorption chamber 51 during the rotation of the stirring rod 54. The upper extension arm 541 and the lower extension arm 542 are designed as closed structures so that they are used only for stirring. The discharge extension arm 543 is designed as a hollow structure so that it is connected to the main body of the stirring rod 54, allowing the adsorption fiber balls 57 to be added from inside the stirring rod 54 into the adsorption chamber 51.

[0044] By moving the adsorption fiber ball 57 from inside the stirring rod 54 to the discharge extension arm 543, and at this time the stirring rod 54 is rotating at high speed, the discharge extension arm 543 can throw out the adsorption fiber ball 57 under the action of centrifugal force of high speed rotation, thus completing the feeding work of the adsorption unit 5.

[0045] like Figures 6 to 7As shown, although the aforementioned stirring rod 54 can solve the problem of automatic feeding, in actual operation, the accumulation of adsorbent fiber balls 57 inside the stirring rod 54 can cause blockage, thus causing the adsorption unit 5 to stop working. Therefore, a pusher motor 544 is fixedly installed inside the stirring rod 54, and a cross-shaped pusher plate 545 is fixedly installed at the output end of the pusher motor 544; the cross-shaped pusher plate 545 corresponds to the discharge extension arm 543. The advantage of this is that during the high-speed rotation of the stirring rod 54, Since the pusher motor 544 and the cross-shaped pusher plate 545 are installed inside the stirring rod 54, the pusher motor 544 and the cross-shaped pusher plate 545 are stationary relative to the cross-shaped pusher plate 545 at all times. Therefore, during the rotation of the stirring rod 54, the control unit 2 can control the pusher motor 544 to rotate periodically, which can make the cross-shaped pusher plate 545 move periodically. That is, when the cross-shaped pusher plate 545 is moving periodically, it can periodically push the adsorbent fiber balls 57 into the discharge extension arm 543, and then throw them into the adsorption chamber 51 by centrifugal force.

[0046] At any time, the cross-shaped pusher plate 545 can push a certain number of adsorbent fiber balls 57 into the discharge extension arm 543, which avoids the problem of adsorbent fiber balls 57 accumulating inside the stirring rod 54 and causing blockage inside the stirring rod 54, thereby improving work efficiency.

[0047] like Figure 8 As shown, since the adsorption chamber 51 is used to treat industrial wastewater after sedimentation and separation, the adsorption chamber 51 needs to be cleaned regularly. This is to prevent scale from forming inside the adsorption chamber 51 due to waste during long-term operation, which would affect the operation of the adsorption unit 5. Therefore, a stirring rod 546 is slidably installed inside the upper extension arm 541 and the lower extension arm 542. The stirring rod 546 is a solid structure. A discharge rod 547 is fixedly installed inside the discharge extension arm 543. Springs 548 are symmetrically fixedly installed between the stirring rod 546 and the discharge rod 547 and the upper extension arm 541, the lower extension arm 542, and the discharge extension arm 543.

[0048] During the high-speed rotation of the stirring rod 54, under the action of centrifugal force, the stirring rod 546 and the discharge rod 547 extend, which can improve the stirring effect. However, when the stirring rod 54 stops rotating, under the action of the spring 548, the first telescopic rod and the second telescopic rod will be pulled back, which can facilitate the insertion of cleaning tools when cleaning the adsorption chamber 51, thus facilitating the cleaning of the cleaning chamber.

[0049] like Figure 9As shown, after the stirring rod 54 stirs, the adsorption fiber balls 57 need to be collected. Therefore, an inner liner 511 is fixedly installed inside the adsorption chamber 51. The inner liner 511 is equipped with a spiral water inlet 512. This divides the adsorption chamber 51 into two areas. During the stirring process of the stirring rod 54, the adsorption fiber balls 57 will enter the area between the inner liner 511 and the adsorption chamber 51 through the spiral water inlet 512. After the stirring chamber stops stirring, the adsorption fiber balls 57 can be collected between the adsorption chamber 51 and the inner liner 511.

[0050] like Figure 9 As shown, since the above-mentioned mechanism gathers the adsorbent fiber balls 57 in the area between the inner liner 511 and the adsorption chamber 51, filter bags 513 are slidably installed at the four corners of the inner liner 511, and the inner liner 511 has through holes at the positions of the filter bags 513. In this way, since the area between the inner liner 511 and the adsorption chamber 51 will return to the inner liner 511 from the filter bags 513 through the through holes, that is, the water flow will carry the adsorbent fiber balls 57 into the filter bags 513, so that all the adsorbent fiber balls 57 can be gathered in the filter bags 513. At the same time, since the filter bags 513 are slidably installed at the four corners of the inner liner 511, the adsorbent fiber balls 57 can be collected by removing the filter bags 513 after the stirring stops.

[0051] like Figures 10 to 11 As shown, during the process of the stirring rod 54 stopping rotation, the speed of the stirring rod 54 will gradually decrease, so the water in the adsorption chamber 51 will flow into the lower extension arm 542. Therefore, an automatic sliding cover 7 is fixedly installed at the end of the discharge movable rod 547, and a sealing strip 71 is fixedly installed on the automatic sliding cover 7. In this way, during the process of the stirring rod 54 decelerating, the control unit 2 can control the automatic sliding cover 7 to close, and at the same time, due to the presence of the sealing strip 71, the water in the adsorption chamber 51 will be isolated outside the lower extension arm 542.

[0052] Second Implementation Method

[0053] like Figure 12 The image shows a second embodiment of an oil-containing heavy metal industrial wastewater treatment system. The oil-containing heavy metal industrial wastewater treatment system in this specific embodiment differs from that in the first specific embodiment. Figure 1The structure, installation, locking, assembly, and removal methods of the oily heavy metal industrial wastewater treatment system shown are basically similar, and will not be repeated here. Only the differences from the first embodiment will be described. The difference is that the plurality of adsorption fiber balls 57 are coated with a water-soluble membrane 8, which is made of polyvinyl alcohol; and the diameter of the stirring rod 54 and the extension arm is doubled. In this way, when feeding, compared with the adsorption fiber balls 57 entering one by one, the second embodiment can feed the adsorption fiber balls 57 into the adsorption unit 5 faster. When a bag of adsorption fiber balls 57 is thrown into the adsorption chamber 51, the water-soluble membrane 8 of polyvinyl alcohol melts, and the adsorption fiber balls 57 disperse in the water for adsorption.

[0054] During operation, the staff first discharges the oily heavy metal industrial wastewater into the sedimentation unit 3. After sedimentation for a period of time, the control unit 2 controls the push plate 33 to push the upper layer of oil sludge into the collection chamber 35. At this time, the water pump 4 starts working, pumping the pre-treated oily heavy metal industrial wastewater from the sedimentation unit 3 to the adsorption unit 5. At this time, the adsorption fiber balls 57 are thrown into the adsorption unit 5 from the stirring rod 54 for adsorption. The adsorption fiber balls 57 rotate with the rotation of the stirring rod 54, and the adsorption fiber balls 57 in the rotating tube will be evenly distributed in the adsorption chamber 51 for adsorption. At the same time, the rotating adsorption fiber balls 57 will enter the area between the inner tank 511 and the adsorption chamber 51 through the spiral inlet 512. Due to the above mechanism, the adsorption fiber balls 57 are gathered in the inner tank 511. The inner liner 511 is located in the middle area of ​​the adsorption chamber 51. Therefore, filter bags 513 are slidably installed at the four corners of the inner liner 511, and the inner liner 511 has through holes at the positions of the filter bags 513. In this way, the water flow will carry the adsorption fiber balls 57 into the filter bags 513 through the through holes, so that all the adsorption fiber balls 57 can be collected in the filter bags 513. At the same time, since the filter bags 513 are slidably installed at the four corners of the inner liner 511, the adsorption fiber balls 57 can be collected by removing the filter bags 513 after the stirring stops. At this time, the treated water enters the filtration unit 6 from the adsorption unit 5, and is discharged after being filtered by the filtration unit 6.

[0055] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A system for treating oily heavy metal industrial wastewater, comprising a support frame (1), a control mechanism (2), a sedimentation mechanism (3), a water pump (4), an adsorption mechanism (5), and a filtration mechanism (6), characterized in that, The bracket (1) is fixedly installed on the ground and is used to support the entire wastewater treatment system. The control mechanism (2) is fixedly installed on the bracket (1) and is used to control the entire wastewater treatment system. The sedimentation mechanism (3) is fixedly installed on the bracket (1) and is used to settle and separate oil and wastewater, and collect the oil. The water pump (4) is fixedly installed on the right side of the sedimentation mechanism (3) and is used to pump water from the right side of the sedimentation mechanism (3) to the adsorption mechanism (5). The adsorption mechanism (5) is fixedly installed on the right side of the water pump (4) and is used to adsorb the remaining oil onto the carrier and collect it. The filter mechanism (6) is fixedly installed on the right side of the adsorption mechanism (5) and is used to filter the remaining impurities in the wastewater. The water pump (4) is fixedly installed between the filter mechanism (6) and the adsorption mechanism (5).

2. The oil-containing heavy metal industrial wastewater treatment system according to claim 1, characterized in that: The adsorption mechanism (5) includes an adsorption chamber (51), an inlet (52), an outlet (53), a stirring rod (54), a stirring motor (55), a motor housing (56), and adsorption fiber balls (57). The adsorption chamber (51) is fixedly installed on the bracket (1). The adsorption chamber (51) has an inlet (52) on its left side and an outlet (53) on its right side. The stirring rod (54) is rotatably installed in the center of the adsorption chamber (51). One end of the stirring rod (54) passes through the adsorption chamber (51) and is fixedly connected to the output shaft of the stirring motor (55). The stirring motor (55) is fixedly installed on the bottom surface of the adsorption mechanism (5). The motor housing (56) is fixedly installed on the outside of the stirring motor (55). Adsorption fiber balls (57) are placed inside the adsorption chamber (51).

3. The oil-containing heavy metal industrial wastewater treatment system according to claim 1, characterized in that: The sedimentation mechanism (3) includes a sedimentation chamber (31), a moving track (32), a push plate (33), rollers (34), and a collection chamber (35). The sedimentation chamber (31) is fixedly installed on the bracket (1). The moving track (32) is fixedly installed on both sides of the sedimentation chamber (31). The push plate (33) is slidably installed on the moving track (32). Rollers (34) are fixedly installed around the push plate (33). The rollers (34) are slidably installed on the moving track (32). A moving motor is fixedly installed above the push plate (33). The collection chamber (35) is fixedly installed on the left side of the push plate (33).

4. The oil-containing heavy metal industrial wastewater treatment system according to claim 2, characterized in that: The stirring rod (54) has a hollow structure inside, and the stirring rod (54) has three extension arms, namely an upper extension arm (541), a lower extension arm (542) and a discharge extension arm (543); among which the upper extension arm (541) and the lower extension arm (542) are closed structures, and the discharge extension arm (543) is a hollow structure.

5. The oil-containing heavy metal industrial wastewater treatment system according to claim 4, characterized in that: The stirring rod (54) is fixedly installed with a pusher motor (544), and a cross-shaped pusher plate (545) is fixedly installed at the output end of the pusher motor (544); the cross-shaped pusher plate (545) corresponds to the discharge extension arm (543).

6. The oil-containing heavy metal industrial wastewater treatment system according to claim 5, characterized in that: A stirring rod (546) is slidably installed inside the upper extension arm (541) and the lower extension arm (542), and the stirring rod (546) is a solid structure; a discharge rod (547) is fixedly installed inside the discharge extension arm (543); springs (548) are symmetrically fixedly installed between the stirring rod (546) and the discharge rod (547) and the upper extension arm (541), the lower extension arm (542) and the discharge extension arm (543).

7. The oil-containing heavy metal industrial wastewater treatment system according to claim 6, characterized in that: The adsorption chamber (51) is fixedly installed with an inner liner (511), and the inner liner (511) is equipped with a spiral water inlet (512) arranged in an array inside.

8. The oil-containing heavy metal industrial wastewater treatment system according to claim 7, characterized in that: The inner liner (511) has filter bags (513) slidably installed at its four corners, and the inner liner (511) has through holes at the positions of the filter bags (513).

9. The oil-containing heavy metal industrial wastewater treatment system according to claim 8, characterized in that: An automatic sliding cover (7) is fixedly installed at the end of the discharge movable rod (547), and a sealing strip (71) is fixedly installed on the automatic sliding cover (7).

10. The oil-containing heavy metal industrial wastewater treatment system according to claim 1, characterized in that: Multiple adsorption fiber balls (57) are coated with a water-soluble membrane (8), which is made of polyvinyl alcohol.

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