A device for treating landfill leachate using a forward osmosis membrane

Abstract

The utility model discloses a device of utilizing positive osmosis membrane membrane treatment landfill leachate, include: treatment pond, filter mechanism and cycle prefiltering mechanism, filter mechanism installs in the treatment pond, and filter mechanism includes upper screening board, and the upper screening board is fixed on the inner wall of treatment pond, and the upper screening board is carved with a plurality of first screening hole that distributes evenly on, and the upper screening board is inserted with the rotary column pole, and one side of rotary column pole is provided with the collection frame, and the collection frame is fixedly installed with the collection net bag, cycle prefiltering mechanism installs outside the treatment pond, and cycle prefiltering mechanism includes the temporary storage frame, and the temporary storage frame is fixed on the outer wall of treatment pond, and the temporary storage frame is fixedly installed with the lower screening board between the outer wall of treatment pond, and the lower screening board is carved with a plurality of second screening hole that distributes evenly on. The utility model discloses through the pretreatment of landfill leachate, makes landfill leachate when carrying out positive osmosis membrane membrane treatment not easy to take place the situation of jam and membrane damage, improves the treatment effect to landfill leachate.

Description

Technical Field

[0001] This utility model belongs to the field of liquid filtration technology, specifically relating to a device for treating landfill leachate using a forward osmosis membrane. Background Technology

[0002] Landfill leachate mainly originates from rainwater runoff from landfills and the water contained within the landfill itself. It is a complex, high-concentration organic wastewater that, if discharged directly into the environment without treatment, will cause serious environmental pollution. The main pollutants fall into four categories: organic matter, dissolved heavy metal ions, organic and inorganic nitrogen compounds, and dissolved solids.

[0003] Currently, landfill leachate treatment plants generally use a single reverse osmosis unit (such as a two-stage reverse osmosis unit). This type of unit has high energy consumption, and due to the heavy metals contained in the wastewater, poor operation and maintenance can easily lead to scaling of the reverse osmosis membrane elements, reducing flux and resulting in poor treatment efficiency. Therefore, in recent years, a membrane separation technology utilizing forward osmosis membranes has been developed. This technology relies on the osmotic pressure difference across the selectively permeable membrane to spontaneously achieve water transfer. Compared to pressure-driven membrane separation processes such as microfiltration, ultrafiltration, and reverse osmosis, this technology has many unique advantages in its process nature, such as low-pressure or even pressureless operation, resulting in lower energy consumption; almost complete retention of many pollutants, leading to good separation efficiency; low membrane fouling characteristics; and simple membrane processes and equipment.

[0004] However, since landfill leachate mainly comes from landfills, it contains a large number of impurities, which can easily cause membrane clogging and damage during treatment. Therefore, it is necessary to pretreat the landfill leachate to remove impurities and facilitate forward osmosis membrane treatment.

[0005] Therefore, in view of the above-mentioned technical problems, it is necessary to provide an apparatus for treating landfill leachate using a forward osmosis membrane.

[0006] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0007] The purpose of this invention is to provide a device for treating landfill leachate using a forward osmosis membrane, which can solve the problems of easy clogging and membrane damage in the prior art when treating landfill leachate with a forward osmosis membrane.

[0008] To achieve the above objectives, a specific embodiment of this utility model provides an apparatus for treating landfill leachate using a forward osmosis membrane, comprising: a treatment tank, a filtration mechanism, and a circulating pre-filtration mechanism;

[0009] The filtration mechanism is installed in the treatment tank. The filtration mechanism includes an upper screening plate, which is fixed to the inner wall of the treatment tank. The upper screening plate has a plurality of evenly distributed first screening holes. A rotating column is inserted into the upper screening plate. A collection frame is provided on one side of the rotating column, and a collection net is fixedly installed on the collection frame.

[0010] The circulating pre-filtration mechanism is installed outside the treatment tank. The circulating pre-filtration mechanism includes a temporary storage frame, which is fixed to the outer wall of the treatment tank. A lower screening plate is fixedly installed between the temporary storage frame and the outer wall of the treatment tank. The lower screening plate has a plurality of evenly distributed second screening holes.

[0011] In one or more embodiments of this utility model, a drain pipe is fixedly installed at the bottom of the treatment tank for discharging the filtered landfill leachate to the outside, thereby facilitating forward osmosis membrane treatment. The drain pipe is equipped with a plug to seal the drain pipe, thereby preventing dust from entering and blocking the leakage of landfill leachate.

[0012] In one or more embodiments of this utility model, the treatment tank is provided with a plurality of evenly distributed lower drain channels, which allow the leachate and impurities above the upper screening plate to flow back into the lower screening plate through the lower drain channels, thereby achieving secondary filtration.

[0013] In one or more embodiments of this utility model, a drive motor is fixedly connected to one end of the rotating column rod. The drive motor is fixed inside the treatment tank and is used to drive the rotating column rod to rotate, thereby providing power for the rotation of multiple brushes and collection frames, facilitating the collection of impurities filtered from landfill leachate, and thus making cleaning easier. A protective frame is fixedly installed on the outside of the drive motor to protect the drive motor, making it less prone to damage and improving the service life of the device.

[0014] In one or more embodiments of this utility model, a sealed bearing is fixedly connected between the protective frame and the rotating column to improve the sealing performance, thereby making the drive motor less susceptible to the influence of landfill leachate and making the rotation of the rotating column less affected.

[0015] In one or more embodiments of this utility model, a stirring rod is fixedly installed on one end of the rotating column rod below the upper screening plate for stirring the landfill leachate. When flocculant needs to be added to the landfill leachate, the stirring rod can fully disperse the flocculant and improve the contact effect with the landfill leachate.

[0016] In one or more embodiments of this utility model, a connecting bearing is fixedly installed between the rotating column and the upper screening plate to fix the rotating column and to make the rotation of the rotating column less susceptible to influence.

[0017] In one or more embodiments of this utility model, a supporting crossbar is fixed on the rotating column, and multiple evenly distributed brushes are fixedly installed on the supporting crossbar. The multiple brushes can wash the first screening hole, so that the first screening hole is less likely to be blocked, thereby preventing leachate from accumulating above the upper screening plate.

[0018] In one or more embodiments of this utility model, a supporting thin rod is also fixed on the rotating column. The supporting thin rod passes through the collection frame and is used to fix the collection frame and enable the rotating column to drive the rotation of the collection frame, thereby driving the collection net to rotate, which facilitates the collection of impurities in the landfill leachate.

[0019] In one or more embodiments of this utility model, a circulating water pump is installed in the temporary storage frame, and a liquid delivery pipe is fixedly installed on the circulating water pump. The other end of the liquid delivery pipe passes through the treatment tank, so that the leachate in the temporary storage frame can flow into the treatment tank for further filtration, which facilitates the circulation of the leachate.

[0020] Compared with the prior art, this utility model improves the treatment effect of landfill leachate by pretreating it, making it less prone to clogging and membrane damage during forward osmosis membrane treatment. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a perspective view of an apparatus for treating landfill leachate using a forward osmosis membrane, according to an embodiment of the present invention.

[0023] Figure 2 for Figure 1 The structural diagram shown at point A in the middle;

[0024] Figure 3 This is a perspective view of an apparatus for treating landfill leachate using a forward osmosis membrane, according to an embodiment of the present invention.

[0025] Figure 4 for Figure 3 The structural diagram shown at point B in the middle;

[0026] Figure 5 This is a schematic diagram of the structure of the collection frame in one embodiment of the present invention.

[0027] Explanation of key figure labels:

[0028] 1-Treatment tank, 101-Drain pipe, 102-Plug, 103-Lower trough, 2-Filtration mechanism, 201-Upper sieve plate, 202-First sieve hole, 203-Rotating column rod, 204-Collection frame, 205-Collection net, 206-Drive motor, 207-Protective frame, 208-Sealed bearing, 209-Stirring rod, 210-Connecting bearing, 211-Support crossbar, 212-Brush, 213-Support thin rod, 3-Circulating pre-filtration mechanism, 301-Temporary storage frame, 302-Lower sieve plate, 303-Second sieve hole, 304-Circulating water pump, 305-Transfer liquid pipe. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0030] like Figures 1 to 5 As shown, an embodiment of the present invention provides an apparatus for treating landfill leachate using a forward osmosis membrane, comprising: a treatment tank 1, a filtration mechanism 2, and a circulating pre-filtration mechanism 3.

[0031] like Figures 1 to 3 As shown, a drain pipe 101 is fixedly installed at the bottom of the treatment tank 1 to discharge the filtered landfill leachate, thus facilitating forward osmosis membrane treatment. The drain pipe 101 is equipped with a plug 102 to seal it, preventing dust from entering and blocking leachate leakage. Multiple evenly distributed lower drainage channels 103 are carved into the treatment tank 1 to allow the landfill leachate and impurities above the upper screening plate 201 to flow back onto the lower screening plate 302 through the lower drainage channels 103, thereby achieving secondary filtration.

[0032] like Figures 1 to 5As shown, the filtration mechanism 2 is installed inside the treatment tank 1. The filtration mechanism 2 includes an upper screening plate 201, which is fixed to the inner wall of the treatment tank 1 to prevent it from moving or falling off. Multiple evenly distributed first screening holes 202 are drilled on the upper screening plate 201. The leachate can be filtered through the first screening holes 202 to remove impurities, facilitating subsequent forward osmosis membrane treatment.

[0033] The upper screening plate 201 is equipped with a rotating rod 203, which drives the collection frame 204 and multiple brushes 212 to rotate, providing conditions for removing impurities. A collection frame 204 is provided on one side of the rotating rod 203 to facilitate the collection of impurities. A collection net 205 is fixedly installed on the collection frame 204.

[0034] like Figures 1 to 4 As shown, a drive motor 206 is fixedly connected to one end of the rotating column 203. The drive motor 206 is fixed inside the treatment tank 1 and is used to drive the rotating column 203 to rotate, thereby providing power for the rotation of multiple brushes 212 and collection frame 204, facilitating the collection of impurities filtered from the landfill leachate, and thus making cleaning easier. A protective frame 207 is fixedly installed on the outside of the drive motor 206 to protect the drive motor 206, making it less prone to damage and improving the service life of the device.

[0035] A sealed bearing 208 is fixedly connected between the protective frame 207 and the rotating column 203 to improve the sealing performance, thereby making the drive motor 206 less susceptible to the influence of landfill leachate and making the rotation of the rotating column 203 less affected.

[0036] In addition, a stirring rod 209 is fixedly installed on one end of the rotating column rod 203 below the upper screening plate 201 for stirring the landfill leachate. When flocculant needs to be added to the landfill leachate, the stirring rod 209 can fully disperse the flocculant and improve the contact effect with the landfill leachate.

[0037] like Figures 1 to 4 As shown, a connecting bearing 210 is fixedly installed between the rotating column 203 and the upper screening plate 201 to fix the rotating column 203 and prevent its rotation from being easily affected. A supporting crossbar 211 is fixed on the rotating column 203, and multiple evenly distributed brushes 212 are fixedly installed on the supporting crossbar 211. The multiple brushes 212 can clean the first screening hole 202, thereby preventing the first screening hole 202 from becoming clogged, and thus preventing leachate from accumulating above the upper screening plate 201.

[0038] like Figures 1 to 4As shown, a supporting thin rod 213 is also fixed on the rotating column 203. The supporting thin rod 213 passes through the collection frame 204 and is used to fix the collection frame 204. It also enables the rotating column 203 to drive the collection frame 204 to rotate, thereby driving the collection net 205 to rotate, which facilitates the collection of impurities in the landfill leachate.

[0039] like Figures 1 to 3 As shown, the circulating pre-filtration mechanism 3 is installed outside the treatment tank 1. The circulating pre-filtration mechanism 3 includes a temporary storage frame 301, which is fixed to the outer wall of the treatment tank 1. A lower screening plate 302 is fixedly installed between the temporary storage frame 301 and the outer wall of the treatment tank 1. The lower screening plate 302 has multiple evenly distributed second screening holes 303. A circulating water pump 304 is installed inside the temporary storage frame 301. A liquid delivery pipe 305 is fixedly installed on the circulating water pump 304. The other end of the liquid delivery pipe 305 passes through the treatment tank 1, allowing the leachate in the temporary storage frame 301 to flow into the treatment tank 1 for further filtration, facilitating the circulation of the leachate.

[0040] In practical use, the landfill leachate is first poured into the temporary storage frame 301. It is then filtered through the lower screening plate 302 and the second screening hole 303 to remove larger impurities. Then, the leachate is pumped into the treatment tank 1 by the circulating water pump 304 and transported through the delivery pipe 305. It is also sprayed onto the upper screening plate 201 for further filtration, so that smaller impurities in the leachate can also be filtered out.

[0041] The drive motor 206 drives the rotating column 203 to rotate, which in turn drives the supporting thin rod 213, the collection frame 204, the supporting crossbar 211, and the multiple brushes 212 to rotate. The multiple brushes 212 can wash the multiple first screening holes 202 to prevent them from becoming blocked. The collection frame 204 can collect the impurities above the upper screening plate 201 and drop them into the collection net bag 205 for easy cleaning by staff. Some impurities will float and flow back into the lower screening plate 302 through the lower trough 103 for further filtration. The leachate can then be discharged through the drain pipe 101.

[0042] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0043] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An apparatus for treating landfill leachate using a forward osmosis membrane, characterized in that, include: Treatment pool; A filtration mechanism is installed inside the treatment tank. The filtration mechanism includes an upper screening plate, which is fixed to the inner wall of the treatment tank. The upper screening plate has multiple evenly distributed first screening holes. A rotating column is inserted into the upper screening plate. A collection frame is provided on one side of the rotating column, and a collection net is fixedly installed on the collection frame. A circulating pre-filtration mechanism is installed outside the treatment tank. The circulating pre-filtration mechanism includes a temporary storage frame, which is fixed to the outer wall of the treatment tank. A lower screening plate is fixedly installed between the temporary storage frame and the outer wall of the treatment tank. The lower screening plate has a plurality of evenly distributed second screening holes.

2. The apparatus for treating landfill leachate using a forward osmosis membrane according to claim 1, characterized in that, A drain pipe is fixedly installed at the bottom of the treatment tank, and the drain pipe is equipped with a plug.

3. The apparatus for treating landfill leachate using a forward osmosis membrane according to claim 1, characterized in that, The treatment pool has multiple evenly distributed drainage channels.

4. The apparatus for treating landfill leachate using a forward osmosis membrane according to claim 1, characterized in that, One end of the rotating column is fixedly connected to a drive motor, which is fixed inside the treatment tank. A protective frame is fixedly installed on the outside of the drive motor.

5. The apparatus for treating landfill leachate using a forward osmosis membrane according to claim 1, characterized in that, A stirring rod is fixedly installed on one end of the rotating column rod below the upper sieve plate.

6. The apparatus for treating landfill leachate using a forward osmosis membrane according to claim 1, characterized in that, A connecting bearing is fixedly installed between the rotating column and the upper screening plate.

7. The apparatus for treating landfill leachate using a forward osmosis membrane according to claim 1, characterized in that, A support crossbar is fixed on the rotating column, and multiple evenly distributed brushes are fixedly installed on the support crossbar.

8. The apparatus for treating landfill leachate using a forward osmosis membrane according to claim 1, characterized in that, A supporting thin rod is also fixed on the rotating column, and the supporting thin rod passes through the collection frame.

9. The apparatus for treating landfill leachate using a forward osmosis membrane according to claim 1, characterized in that, A circulating water pump is installed in the temporary storage frame, and a liquid delivery pipe is fixedly installed on the circulating water pump. The other end of the liquid delivery pipe passes through the treatment tank.

10. The apparatus for treating landfill leachate using a forward osmosis membrane according to claim 4, characterized in that, A sealed bearing is fixedly connected between the protective frame and the rotating column.

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