A front emergency filter structure of a front filter device of a water inlet pipe of a jet flow aerator

Abstract

The utility model relates to a front -positioned emergency filter structure of front -positioned filter device of water injection pipe of jet aerator, the filter device includes filter drum, the flange edge is provided with a plurality of even annular distribution's mounting hole at the cylinder mouth of filter drum, the filter structure includes jet pump, check valve, the input end of jet pump is connected with first butterfly valve through first soft joint, the output of jet pump is connected with check valve through second soft joint, the output end of check valve is connected with second butterfly valve, the filter device is arranged between jet pump and second soft joint, the utility model can be equipped with suitable front -positioned filter for jet aerator, also guarantees whole biochemical treatment system stable operation, reduces operation cost.

Description

Technical Field

[0001] This utility model relates to the field of jet aerator technology, and in particular to a pre-emergence emergency filtration structure for a jet aerator inlet pipe pre-filter device. Background Technology

[0002] With the rapid development of environmental protection in my country, jet aerators have become a highly competitive aeration technology choice in wastewater treatment aeration systems due to their comprehensive advantages such as high efficiency, energy saving, good mixing effect, resistance to clogging, and reliable operation. They perform particularly well in deep tanks, high-concentration wastewater, and processes requiring denitrification. In conventional designs, considering that most large particles in the wastewater that easily clog pipes and equipment (including jet aerators) are removed in the pre-treatment process, a separate filtration device is generally not designed in the inlet pipe of the jet aerator. However, sometimes due to the failure of the pre-treatment filtration device, or other reasons causing large particles to enter the biological treatment tank (such as leaves and branches), they can easily be drawn into the jet aerator by the jet pump, leading to clogging and affecting the aeration effect. In severe cases, it may be necessary to shut down the system for tank cleaning to remove impurities from the jet aerator, thus affecting normal wastewater treatment. Currently, pre-filtration solutions for jet aerators mainly include basket strainers, automatic backflush filters, rotary solid-liquid separators / drum filters, and hydrocyclones / grit separators. However, each of these pre-filtration solutions currently used in existing aeration equipment pipelines has its own shortcomings. Basket strainers suffer from limited installation space and cannot operate continuously; automatic backflush filters have high initial investment, require backflush drain pipes, and are cumbersome to install; rotary solid-liquid separators / drum filters are relatively complex, occupy a larger area, and have higher costs and operating expenses; and hydrocyclones are ineffective against lightweight fibers and hair and have limited installation space. Utility Model Content

[0003] The purpose of this utility model is to provide a pre-emergence emergency filtration structure for a pre-filter device in the inlet pipe of a jet aerator, which can equip the jet aerator with a suitable pre-filter, and also ensure the stable operation of the entire biochemical treatment system and reduce operating costs.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an emergency filtration structure for a pre-filter device for a jet aerator inlet pipe, the filtration device including a filter cylinder, a flange edge provided at the cylinder opening, and a plurality of uniformly annularly distributed mounting holes provided on the flange edge; The filtration structure includes a jet pump and a check valve. The input end of the jet pump is connected to a first butterfly valve via a first flexible joint. The output end of the jet pump is connected to a check valve via a second flexible joint. The output end of the check valve is connected to a second butterfly valve. The filtration device is disposed between the jet pump and the second flexible joint.

[0005] Furthermore, the filter cartridge is provided with a plurality of evenly distributed filter holes, the diameter of which is 3 to 5 mm.

[0006] Furthermore, the flange edge has a thickness of 3 mm, and the filter cartridge has a thickness of 2 mm.

[0007] Furthermore, both the flange and the filter cartridge are made of stainless steel.

[0008] Furthermore, a pressure gauge is installed at the outlet of the jet pump.

[0009] Furthermore, the filter cartridge of the filter device is fixed to the connecting flange of the second flexible joint and the check valve via a flange edge.

[0010] Furthermore, the height of the filter cartridge is 2 / 3 to 3 / 4 of the height of the second flexible connection.

[0011] The beneficial effects of this utility model are as follows: This utility model is specifically designed for existing jet aeration systems without filtration devices. The filtration device is made into a thin flange-type inner cylinder and installed in the flexible connection at the outlet of the jet pump using a clamp-on installation method. By controlling the filter aperture to between 3 and 5 mm, it can ensure effective interception of impurities, thereby ensuring the stable operation of the aerator. The clamp-on installation method and installation in the flexible connection at the outlet of the jet pump can effectively solve the problem of insufficient installation space and is also inexpensive. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the pre-filter device. Figure 2 This is a top view of the pre-filter device; Figure 3 This is a front view of the pre-filter device; Figure 4 This is a schematic diagram of the pre-emergency filter structure; Figure 5 Schematic diagram of the installation location of the pre-emergence emergency filter structure.

[0013] The components are: 1. First butterfly valve, 2. First flexible joint, 3. Jet pump, 4. Second flexible joint, 5. Filter device, 51. Filter cylinder, 52. Flange edge, 53. Filter hole, 54. Mounting hole, 6. Check valve, 7. Pressure gauge, 8. Second butterfly valve, 9. Aerator, 10. Gate valve, 11. Nitrification tank. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings. For better understanding, the orientation of the present invention is described based on the orientation shown in the accompanying drawings and should not be construed as a limitation of this application; the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0015] Please see Figures 1 to 5 This utility model provides an embodiment: an emergency filtration structure for a pre-filter device of a jet aerator inlet pipe. The filtration device 5 includes a filter cylinder 51, with a flange 52 at the opening of the filter cylinder 51. The flange 52 has multiple uniformly distributed annular mounting holes 54. The filtration structure includes a jet pump 3 and a check valve 6. The input end of the jet pump 3 is connected to a first butterfly valve 1 via a first flexible connector 2. The output end of the jet pump 3 is connected to the check valve 6 via a second flexible connector 4. The output end of the check valve 6 is connected to a second butterfly valve 8. The filtration device 5 is positioned between the jet pump 3 and the second flexible connector 4. Figure 5 As shown, the pre-emergence emergency filter structure is located outside the nitrification tank 10. The second butterfly valve 8 can connect to the aerator 9 inside the nitrification tank 10. The aerator 9 is connected to the blower through connecting pipes and gate valves. The jet pump 3 extends into the nitrification tank 10 through the first butterfly valve 1 and connecting pipes. Due to the installation method and location of the filter device 5, the filter device 5 of this utility model is made into a thin-plate flange-type inner cylinder, using a clamp-on installation method and installed in the flexible connection at the outlet of the jet pump 3. This effectively solves the problem of insufficient installation space and is inexpensive.

[0016] Please continue reading. Figure 5 As shown, in one embodiment of this utility model, the filter cylinder 51 is provided with a plurality of evenly distributed filter holes 53, the diameter of which is 3-5 mm. Generally, the diameter of the filter holes 53 is required to be controlled between 3-5 mm; preferably, the diameter can be 4 mm. The flow rate of the filter device 5 must match the rated flow rate of the system pump, with an appropriate margin to avoid excessive head loss. The filter cylinder 51 is configured as a perforated mesh type, with its outer diameter (DN100) one size smaller than the inner diameter (DN125) of the second flexible connection port, and an opening rate ≥60%. By controlling the diameter of the filter holes 53 to between 3-5 mm, effective interception of impurities can be ensured, thereby ensuring the stable operation of the aerator 9. Please continue reading. Figures 1 to 3 As shown, in one embodiment of this utility model, the thickness of the flange edge 52 is 3mm, and the thickness of the filter cylinder 51 is 2mm. To ensure the strength of the flange edge 52 and minimize installation space, the thickness of the flange edge 52 is set to 3mm, and the thickness of the inner cylinder is set to 2mm; this is to ensure filtration accuracy.

[0017] Please continue reading. Figure 5 As shown, in one embodiment of this utility model, both the flange 52 and the filter cylinder 51 are made of stainless steel. Because the nitrification liquid is corrosive, the filter device 5 is made of SUS304 or 316L stainless steel. Please continue reading. Figure 4 , Figure 5 As shown in one embodiment of this utility model, a pressure gauge 7 is installed at the outlet of the jet pump 3. Operators can judge the clogging status of the filter device 5 by the decrease in the pressure gauge 7 reading and arrange timely handling to ensure the stable operation of the aerator 9. When the pressure gauge 7 reading after the jet pump 3 drops to half of the pump head (20 meters) (0.1 MPa), the filter device 5 is severely clogged and needs to be cleaned promptly: close the first butterfly valve 1 and the second butterfly valve 8 before and after the jet pump 3, disassemble the exhaust valve of the pump head of the jet pump 3, drain the liquid from the pump to the second butterfly valve 8 at the rear end, remove the bolts of the upper and lower flanges on the second flexible joint 4 after the pump, remove the second flexible joint 4 and the filter device 5, clean the debris, reinstall the filter device 5 in the second flexible joint 4, and then reinstall the second flexible joint 4 and the filter device 5 back onto the pipeline.

[0018] Please continue reading. Figure 4 , Figure 5 As shown, in one embodiment of this utility model, the filter cylinder 51 of the filter device 5 is fixed to the connecting flange of the second flexible joint 4 and the check valve 6 via a flange edge 52. The dimensions of the flange edge 52 of the filter device 5 and the position of the mounting hole 54 are consistent with the connecting flange (DN125) of the second flexible joint 4.

[0019] Please continue reading. Figures 1 to 5 As shown, in one embodiment of the present invention, the height of the filter cylinder 51 is 2 / 3 to 3 / 4 of the height of the second flexible connector 4.

[0020] The working principle of this utility model is as follows: By making the filter device 5 into a thin flange-type inner cylinder, the filter device 5 adopts a clamp-on installation method and is installed in the outlet flexible connection of the jet pump 3. When the pressure gauge 7 after the jet pump 3 drops to half of the pump head (20 meters) (0.1 MPa), the filter device 5 is severely clogged and needs to be cleaned in time: close the first butterfly valve 1 and the second butterfly valve 8 before and after the jet pump 3, open the exhaust valve of the pump head of the jet pump 3 to drain the liquid in the second butterfly valve 8 at the rear end, remove the bolts of the upper and lower flanges on the second flexible connection 4 after the pump, remove the second flexible connection 4 and the filter device 5, clean the debris, then install the filter device 5 in the second flexible connection 4, and then install the second flexible connection 4 and the filter device 5 back on the pipeline.

[0021] The above description is only a preferred embodiment of the present utility model and should not be construed as a limitation of this application. All equivalent changes and modifications made within the scope of the patent application of the present utility model should be included in the scope of the present utility model.

Claims

1. A pre-emergency filtration structure for a pre-filter device for a jet aerator inlet pipe, the filtration device comprising a filter cylinder, wherein a flange is provided at the opening of the filter cylinder, and a plurality of uniformly annularly distributed mounting holes are provided on the flange. The filtration structure includes a jet pump and a check valve. The input end of the jet pump is connected to a first butterfly valve via a first flexible joint. The output end of the jet pump is connected to a check valve via a second flexible joint. The output end of the check valve is connected to a second butterfly valve. The filtration device is provided between the jet pump and the second flexible joint.

2. The pre-emergence emergency filtration structure of the jet aerator inlet pipe pre-filter device according to claim 1, characterized in that: The filter cylinder is provided with a plurality of evenly distributed filter holes, the diameter of which is 3 to 5 mm.

3. The pre-emergency filtration structure of the jet aerator inlet pipe pre-filter device according to claim 1, characterized in that: The flange edge has a thickness of 3 mm, and the filter cartridge has a thickness of 2 mm.

4. The pre-emergence emergency filtration structure of the jet aerator inlet pipe pre-filter device according to claim 1, characterized in that: Both the flange and the filter cartridge are made of stainless steel.

5. The pre-emergence emergency filtration structure of the jet aerator inlet pipe pre-filter device according to claim 1, characterized in that: A pressure gauge is installed at the outlet of the jet pump.

6. The pre-emergence emergency filtration structure of the jet aerator inlet pipe pre-filter device according to claim 1, characterized in that: The filter cartridge of the filtration device is fixed to the connecting flange of the second flexible joint and the check valve via a flange edge.

7. The pre-emergence emergency filtration structure of the jet aerator inlet pipe pre-filter device according to claim 1, characterized in that: The height of the filter cartridge is 2 / 3 to 3 / 4 of the height of the second flexible joint.

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