Wastewater treatment system

Abstract

The utility model relates to the technical field of wastewater treatment, and particularly discloses a wastewater treatment system. Wherein the filter tank is used for preliminarily filtering impurities in liquid, the anti-disturbance sedimentation tank is used for precipitating the impurities in the liquid, and the filter device is used for removing the impurities in the liquid; the filtering tank comprises a first water outlet, a primary filtering structure which is arranged on one side of the first water outlet and is used for filtering liquid, and a suction pump which is arranged on one side of the first water outlet and is used for pumping the liquid; the anti-disturbance sedimentation tank comprises a first water inlet used for introducing liquid and an anti-disturbance device arranged at the tail end of the first water inlet, and the anti-disturbance device can reduce disturbance of water flow of the first water inlet to the liquid in the anti-disturbance sedimentation tank. According to the utility model, the production cost is reduced, and meanwhile, the rapid filtering capability is realized.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a wastewater treatment system. Background Technology

[0002] In modern industrial production, toner-containing wastewater typically originates from carbon material processing, graphite product manufacturing, toner production, and related cleaning and production processes. Due to the large volume of wastewater, treatment or recycling is necessary. Most factories employ toner-containing wastewater treatment systems with significant limitations. On the one hand, to improve treatment efficiency, systems often increase water flow velocity, but this causes toner in the sedimentation tank to be stirred up and re-mixed into the water, significantly reducing filtration effectiveness. On the other hand, to achieve better treatment results, some factories attempt to use multiple filtration devices, but this undoubtedly increases equipment investment, operating costs, and floor space requirements considerably. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a wastewater treatment system that reduces production costs while possessing rapid filtration capabilities.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A wastewater treatment system includes: a filter tank for preliminary filtration of impurities in a liquid, a sedimentation tank for settling impurities in a liquid, a transfer tank, and a filtration device for removing impurities from the liquid, all connected in sequence. The filter tank includes a first outlet, a primary filter structure for filtering the liquid disposed on one side of the first outlet, and a suction pump for pumping the liquid disposed on one side of the first outlet. The sedimentation tank includes a first inlet for introducing liquid and a sedimentation device disposed at the end of the first inlet, the sedimentation device being able to reduce the disturbance of the liquid in the sedimentation tank by the water flow from the first inlet.

[0006] According to some embodiments of the present invention, the anti-disturbance sedimentation tank further includes a third outlet at its bottom that communicates with the filter tank, the third outlet being used to return the sediment at the bottom of the anti-disturbance sedimentation tank to the filter tank.

[0007] According to some embodiments of the present invention, the primary filtration structure includes a filter cotton structure for adsorbing impurities disposed on the first outlet, and the suction pump can filter the liquid in the filtration tank through the filter cotton structure and enter the first outlet.

[0008] According to some embodiments of the present invention, a positive pressure pump is provided between the transfer tank and the filtration device.

[0009] According to some embodiments of the present invention, the filtration device includes a pretreatment device for pretreating the liquid, an ultrafiltration device for further filtering the liquid, and a reverse osmosis device for further filtering the liquid.

[0010] According to some embodiments of the present invention, the ultrafiltration device includes an ultrafiltration membrane disposed within the ultrafiltration device, the ultrafiltration membrane being able to retain large molecular impurities in the liquid.

[0011] According to some embodiments of the present invention, the reverse osmosis device includes a reverse osmosis membrane disposed within the reverse osmosis device, the reverse osmosis membrane being able to retain small molecule impurities in the liquid while allowing water molecules to pass through.

[0012] According to some embodiments of the present invention, the anti-disturbance device includes a first outlet pipe connected to the end of the first inlet and a second outlet pipe sleeved outside the first outlet pipe. A slow-flow space is formed between the first outlet pipe and the second outlet pipe. The first outlet pipe is provided with a plurality of first outlet holes for discharging the liquid in the inlet pipe into the slow-flow space, and the second outlet pipe is provided with a plurality of second outlet holes for discharging the liquid in the slow-flow space into the pool body.

[0013] According to some embodiments of the present invention, the anti-disturbance sedimentation tank includes a second outlet for discharging liquid at its top and a sedimentation layer at its bottom. An anti-disturbance layer is provided between the second outlet and the sedimentation layer to prevent impurities in the sedimentation layer from rising to the side of the second outlet.

[0014] According to some embodiments of the present invention, the anti-disturbance layer includes a support frame disposed above the sedimentation layer and anti-disturbance filler disposed on the support frame in the form of rolled-up or multi-layered stacked layers.

[0015] This utility model has at least the following beneficial effects:

[0016] The pre-filtration structure effectively removes large particulate impurities and some carbon powder from the wastewater. The anti-disturbance device effectively reduces water flow disturbance, solving the problem of carbon powder re-suspension at high flow rates in traditional sedimentation tanks and ensuring filtration efficiency. The transfer tank prevents the filtration device from being impacted by flow fluctuations, extending its service life. The filtration device further removes residual impurities and fine carbon particles from the wastewater, ensuring that the effluent quality meets the required standards. The entire system achieves efficient, economical, and stable wastewater treatment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the anti-disturbance device according to an embodiment of the present invention. Detailed Implementation

[0019] This invention provides the following description with reference to the accompanying drawings to aid in a comprehensive understanding of the various embodiments of the invention as defined by the claims and their equivalents. The description includes various specific details to aid understanding, but these details should be considered exemplary only. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of the invention.

[0020] In the description of this utility model, the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] It should be understood that when one element (e.g., the first element) is “connected” to another element (e.g., the second element), the element may be directly connected to the other element, or there may be an intervening element (e.g., the third element) between the element and the other element.

[0022] An embodiment of this utility model provides a wastewater treatment system, such as... Figure 1-2 As shown, it includes: a filter tank 101 for preliminary filtration of impurities in the liquid, an anti-disturbance sedimentation tank 201 for settling impurities in the liquid, a transfer tank 3, and a filter device 401 for removing impurities from the liquid, all connected in sequence; the filter tank 101 includes a first outlet 102, a primary filter structure 103 for filtering the liquid disposed on one side of the first outlet 102, and a suction pump 104 for pumping the liquid disposed on one side of the first outlet 102; the anti-disturbance sedimentation tank 201 includes a first inlet 202 for introducing liquid and an anti-disturbance device 203 disposed at the end of the first inlet 202, the anti-disturbance device 203 can reduce the disturbance of the water flow from the first inlet 202 to the liquid in the anti-disturbance sedimentation tank 201.

[0023] The primary filter 103 can initially remove large particulate impurities and some carbon powder from the wastewater, reducing the burden on subsequent treatment units. Simultaneously, the suction pump 104 introduces wastewater into the filter tank 101 via negative pressure suction. This design not only ensures the stability of the water flow but also prevents carbon powder re-suspension caused by positive pressure transport. The anti-disturbance device 203 effectively reduces water flow disturbance, preventing carbon powder in the sedimentation tank from being stirred up, thus solving the problem of carbon powder re-suspension in traditional sedimentation tanks at high flow rates. The transfer tank 3, acting as a buffer between the sedimentation tank and the filter device 401, can regulate the flow rate and pressure of the water, ensuring a smooth flow into the filter device 401 and preventing impact from flow fluctuations, thereby extending the service life of the filter device 401. The filter device 401 can further remove residual impurities and fine carbon powder particles from the wastewater, ensuring that the effluent quality meets the required standards. By sequentially connecting the filtration tank 101, the anti-disturbance sedimentation tank 201, the transfer tank 3, and the filtration device 401, the entire system achieves efficient, economical, and stable wastewater treatment, reducing the number and complexity of equipment and lowering costs and operating and maintenance expenses.

[0024] In some embodiments, such as Figure 1-2 As shown, the anti-disturbance sedimentation tank 201 also includes a third outlet 214 at its bottom that communicates with the filter tank 101. The third outlet 214 is used to return the bottom sediment of the anti-disturbance sedimentation tank 201 to the filter tank 101.

[0025] By returning the liquid at the bottom of the undisturbed sedimentation tank 201 to the filter tank 101, the sedimented liquid can be effectively filtered twice, while reducing the accumulation of carbon powder in the sedimentation tank and extending the service life of the sedimentation tank.

[0026] In some embodiments, such as Figure 1 As shown, the primary filtration structure 103 includes a filter cotton structure 105 for adsorbing impurities, which is provided on the first outlet 102. The suction pump 104 can filter the liquid in the filtration tank 101 through the filter cotton structure 105 and enter the first outlet 102.

[0027] The filter cotton effectively intercepts and adsorbs carbon powder and other impurities in wastewater using its adsorption properties, achieving preliminary purification. This method is low-cost, effective, replaceable, and reduces the load on subsequent treatment structures. The suction pump 104 uses negative pressure to draw the liquid in the filter tank 101 through the filter cotton structure 105 into the first outlet 102, avoiding the carbon powder resuspension problem that might occur with positive pressure transport, thus improving filtration efficiency and stability.

[0028] In some embodiments, such as Figure 1 As shown, a positive pressure pump 5 is installed between the transfer tank 3 and the filter device 401.

[0029] The positive pressure pump 5 provides stable and controllable power support for the transportation of wastewater from the intermediate storage stage to the deep filtration stage, ensuring that the liquid enters the filtration device 401 at a certain pressure and flow rate.

[0030] In some embodiments, such as Figure 1 As shown, the filtration device 401 includes a pretreatment device 402 for pretreating the liquid, an ultrafiltration device 403 for further filtration of the liquid, and a reverse osmosis device 404 for further filtration of the liquid.

[0031] The pretreatment device 402 can remove large particulate impurities and some suspended solids from the wastewater, providing cleaner feed water for subsequent filtration. The ultrafiltration device 403 can remove bacteria, colloids and other impurities. The reverse osmosis device 404 can efficiently remove dissolved salts, organic matter and other impurities. The multi-stage filtration design fully utilizes the advantages of each device to ensure that the effluent water quality reaches extremely high purity and meets strict reuse or discharge standards.

[0032] Furthermore, such as Figure 1 As shown, the ultrafiltration device 403 includes an ultrafiltration membrane disposed within the ultrafiltration device 403, which can retain large molecular impurities in the liquid.

[0033] Ultrafiltration membranes, with their microporous structure, can precisely trap large molecular impurities in liquids, such as colloids, bacteria, viruses, and some organic matter, thereby further improving the filtration efficiency of liquids.

[0034] Furthermore, such as Figure 1 As shown, the reverse osmosis device 404 includes a reverse osmosis membrane disposed within the reverse osmosis device 404. The reverse osmosis membrane can retain small molecule impurities in the liquid and allow water molecules to pass through.

[0035] Reverse osmosis membranes possess extremely high separation precision, effectively retaining small-molecule impurities in liquids, such as dissolved salts, heavy metal ions, and small-molecule organic matter, while allowing only water molecules to pass through, thus achieving deep purification of wastewater. This highly efficient separation capability results in effluent water with extremely high purity, meeting water usage standards. In some embodiments, such as... Figure 2 As shown, the anti-disturbance device 203 includes a first outlet pipe 204 connected to the end of the first inlet 202 and a second outlet pipe 205 sleeved outside the first outlet pipe 204. A slow-flow space 206 is formed between the first outlet pipe 204 and the second outlet pipe 205. The first outlet pipe 204 is provided with a plurality of first outlet holes 207 for discharging the liquid in the inlet pipe into the slow-flow space 206. The second outlet pipe 205 is provided with a plurality of second outlet holes 208 for discharging the liquid in the slow-flow space 206 into the pool body.

[0036] Specifically, the liquid first enters the first outlet pipe 204 through the inlet pipe, then enters the slow-flow space 206 through multiple first outlet holes 207, subsequently enters the tank body through multiple second outlet holes 208, and finally overflows from the outlet to be discharged. This process reduces the inlet water flow velocity, minimizes water flow disturbance, and makes the water in the sedimentation tank more stable, which is conducive to the sedimentation of solid particles, improves sedimentation efficiency, reduces the problem of resuspension of sediments caused by water flow disturbance, and ensures that the sedimentation tank can still operate stably at high flow rates. This provides better inlet water conditions for subsequent treatment units and reduces the overall operating cost and maintenance difficulty of the system. The positions of the first outlet holes 207 and the second outlet holes 208 depend on the assembly relationship between the first outlet pipe 204 and the second outlet pipe 205. Specifically, in this embodiment, the bottoms of the first water outlet pipe 204 and the second water outlet pipe 205 are assembled together. If the first water outlet hole 207 of the first water outlet pipe 204 is located at the bottom, then the second water outlet hole 208 located in the middle or upper part of the second water outlet pipe 205 has a better anti-disturbance effect. If the first water outlet hole 207 is located in the middle or upper part, then the second water outlet hole 208 located in the lower part of the second water outlet pipe 205 is better.

[0037] Furthermore, such as Figure 2 As shown, the anti-disturbance sedimentation tank 201 includes a second outlet 209 for discharging liquid at its top and a sedimentation layer 210 at its bottom. An anti-disturbance layer 211 is provided between the second outlet 209 and the sedimentation layer 210. The anti-disturbance layer 211 is used to prevent impurities in the sedimentation layer 210 from rising to the side of the second outlet 209.

[0038] When liquid enters the undisturbed sedimentation tank 201, due to gravity, denser particles gradually settle. The sedimentation layer 210 is the area formed by the gradual accumulation of these settled solid particles at the bottom of the undisturbed sedimentation tank 201. The location of the undisturbed layer 211 varies depending on the effluent conditions; it can be set as follows: Figure 2 As shown in the embodiment, the anti-disturbance layer 211 is disposed above the second water outlet 208 to prevent sediment in the sedimentation layer 210 from rising to the water outlet and to reduce disturbance to the water outlet. The anti-disturbance layer 211 can also be disposed below the second water outlet 208 to reduce the impact of the incoming water on the sediment in the sedimentation layer 210, thereby reducing the impact of disturbance on the water outlet effect.

[0039] Furthermore, such as Figure 2 As shown, the anti-disturbance layer 211 includes a support frame 212 disposed above the sedimentation layer 210 and anti-disturbance filler 213 disposed on the support frame 212, which is rolled up or stacked in multiple layers.

[0040] The support frame 212 is used to fix the anti-disturbance packing 213. The anti-disturbance packing 213, such as porous PVC plastic packing, is set by rolling or stacking in multiple layers to reduce the impact of the sedimentation layer 210 on the second outlet 209.

[0041] The terms and words used in the foregoing description and claims are not limited to their literal meaning, but are merely used by the applicant to enable a clear and consistent understanding of the present invention. Therefore, those skilled in the art should understand that the foregoing description of various embodiments of the present invention is for illustrative purposes only, and not intended to limit the present invention as defined by the appended claims and their equivalents.

Claims

1. A wastewater treatment system, characterized in that, include: The system comprises, in sequence, a filter tank (101) for preliminary filtration of impurities in the liquid, an anti-disturbance sedimentation tank (201) for settling impurities in the liquid, a transfer tank (3), and a filter device (401) for removing impurities from the liquid; the filter tank (101) includes a first outlet (102), a primary filter structure (103) for filtering the liquid disposed on one side of the first outlet (102), and a suction pump (104) for pumping the liquid disposed on one side of the first outlet (102); the anti-disturbance sedimentation tank (201) includes a first inlet (202) for introducing liquid and an anti-disturbance device (203) disposed at the end of the first inlet (202), the anti-disturbance device (203) reducing the disturbance of the liquid in the anti-disturbance sedimentation tank (201) by the water flow from the first inlet (202).

2. The wastewater treatment system according to claim 1, characterized in that: The anti-disturbance sedimentation tank (201) includes a third outlet (214) at its bottom that communicates with the filter tank (101). The third outlet (214) is used to return the sediment at the bottom of the anti-disturbance sedimentation tank (201) to the filter tank (101).

3. The wastewater treatment system according to claim 1, characterized in that: The primary filtration structure (103) includes a filter cotton structure (105) for adsorbing impurities disposed on the first outlet (102). The suction pump (104) can filter the liquid in the filtration tank (101) through the filter cotton structure (105) and enter the first outlet (102).

4. The wastewater treatment system according to claim 1, characterized in that: A positive pressure pump (5) is provided between the transfer pool (3) and the filter device (401).

5. The wastewater treatment system according to claim 1, characterized in that: The filtration device (401) includes a pretreatment device (402) for pretreating the liquid, an ultrafiltration device (403) for further filtering the liquid, and a reverse osmosis device (404) for further filtering the liquid.

6. A wastewater treatment system according to claim 5, characterized in that: The ultrafiltration device (403) includes an ultrafiltration membrane disposed within the ultrafiltration device (403), which can retain large molecular impurities in the liquid.

7. A wastewater treatment system according to claim 6, characterized in that: The reverse osmosis device (404) includes a reverse osmosis membrane disposed within the reverse osmosis device (404), which can retain small molecule impurities in the liquid and allow water molecules to pass through.

8. A wastewater treatment system according to any one of claims 1-7, characterized in that: The anti-disturbance device (203) includes a first outlet pipe (204) connected to the end of the first inlet (202) and a second outlet pipe (205) sleeved on the outside of the first outlet pipe (204). A slow-flow space (206) is formed between the first outlet pipe (204) and the second outlet pipe (205). The first outlet pipe (204) is provided with a plurality of first outlet holes (207) for discharging the liquid in the inlet pipe into the slow-flow space (206). The second outlet pipe (205) is provided with a plurality of second outlet holes (208) for discharging the liquid in the slow-flow space (206) into the pool body.

9. A wastewater treatment system according to claim 8, characterized in that: The anti-disturbance sedimentation tank (201) includes a second outlet (209) for discharging liquid at its top and a sedimentation layer (210) at its bottom. An anti-disturbance layer (211) is provided between the second outlet (209) and the sedimentation layer (210). The anti-disturbance layer (211) is used to prevent impurities in the sedimentation layer (210) from rising to the side of the second outlet (209).

10. A wastewater treatment system according to claim 9, characterized in that: The anti-disturbance layer (211) includes a support frame (212) disposed above the sedimentation layer (210) and anti-disturbance filler (213) rolled up or stacked in multiple layers on the support frame (212).

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