Initial rainwater filtering equipment

Abstract

The utility model discloses initial rainwater filtering equipment which comprises a treatment pond, a downward flow reverse granularity filtering device and a water inlet device, and the downward flow reverse granularity filtering device comprises a plurality of fiber bundle filtering element modules arranged in the treatment pond. The water inlet device comprises a plurality of water inlet pipes used for inputting initial rainwater into the treatment pond, and at least one part of the water inlet pipes are arranged to obliquely spray downwards relative to the horizontal plane so as to flush the fiber bundle filter element module. Initial rainwater input through the water inlet pipe capable of spraying obliquely and downwards can wash the fiber bundle filtering element module, so that the working period of the fiber bundle filtering element module is prolonged, and the fiber bundle filtering element module is suitable for providing longer-term and stable filtering treatment for the initial rainwater.

Description

Technical Field

[0001] The present application relates to the field of rainwater treatment, and more specifically, to an initial rainwater filtering device. Background Art

[0002] In the early stage of rainfall, rainwater dissolves a large amount of polluting gases such as acidic gases, automobile exhaust, and factory exhaust in the air. After falling to the ground, the rainwater contains a large amount of pollutants due to the washing of roofs, asphalt concrete roads, etc., and the pollution level is high, even exceeding that of ordinary urban sewage. If the initial rainwater is directly discharged into the natural receiving water body, it will cause very serious pollution to the water body. In view of the characteristics of initial rainwater, in order to protect the water environment, the initial rainwater must be treated. In the prior art: road rainwater is collected through rainwater pipes and enters the initial rainwater reservoir of the rainwater pump station for storage, and is transported to the urban sewage pipe through the water pump control to enter the sewage treatment plant for centralized treatment. After the initial rainwater reservoir is full of water, the rainwater is treated with a grating and pumped to an artificial fast infiltration system (such as a fast infiltration system paved with quartz sand and pebbles). The final effluent flows into artificial wetlands and landscape ponds, which are used as landscape water and river and lake supplementary water to achieve the purpose of protecting the natural water environment. However, such systems of the prior art are difficult to solve the problem of blockage of the fast infiltration system and the need for frequent cleaning. Over time, the initial rainwater purification system gradually loses its effectiveness and is difficult to achieve the purpose of protecting the water environment.

[0003] Therefore, how to provide a method for treating initial rainwater in a long-term and stable manner becomes a technical problem that needs to be solved in this application. Utility Model Content

[0004] In view of this, the present application proposes an initial rainwater filtering device to be able to process the initial rainwater in a long-term and stable manner.

[0005] An initial rainwater filtration device, wherein the initial rainwater filtration device includes a treatment tank, a downward flow reverse particle size filter device and a water inlet device, the downward flow reverse particle size filter device includes a plurality of fiber bundle filter element modules arranged in the treatment tank, and the water inlet device includes a plurality of water inlet pipes for inputting initial rainwater into the treatment tank, at least a part of the water inlet pipes are arranged to spray downwardly at an angle relative to a horizontal plane so as to be able to flush the fiber bundle filter element modules.

[0006] Optionally: at least a portion of the water inlet pipes are at an angle of 10°-20° to the horizontal plane; and / or the cross-section of the treatment pool is rectangular, and the water inlet pipes include two opposite groups arranged along the four sides of the rectangle, and at least one group of the water inlet pipes is arranged to spray downwardly at an angle relative to the horizontal plane.

[0007] Optionally, the downward flow reverse particle size filter device includes an upper connecting part and a lower connecting part respectively fixedly connected to the two ends of the fiber bundle filter element module, the lower connecting part is fixed in the pool body, and the downward flow reverse particle size filter device includes a lifting mechanism for lifting the upper connecting part.

[0008] Optionally, the initial rainwater filtration equipment includes an annular flushing pipe surrounding each fiber bundle filter element module of the downward flow reverse particle size filtration device, and the annular flushing pipe is provided with a flushing port facing the fiber bundle filter element module.

[0009] Optionally, the initial rainwater filtration equipment includes two annular flushing pipes arranged in layers along the height direction of the treatment pool, the upper annular flushing pipe is provided with a first flushing port for spraying downward at an angle of 20°-40° relative to the horizontal plane and a second flushing port for horizontal spraying, and the lower annular flushing pipe is provided with a third flushing port for horizontal spraying.

[0010] Optionally, a filtered water outlet for discharging filtered rainwater and a flushing water outlet for discharging flushing water are provided at the bottom of the treatment tank, and the initial rainwater filtration equipment includes a valve device for synchronously operating the opening and closing of the filtered water outlet and the flushing water outlet, so that when one of the filtered water outlet and the flushing water outlet is opened, the other is closed at the same time.

[0011] Optionally, the valve device includes a first valve for closing the filtered water outlet, a second valve for closing the flushing water outlet, a valve plate and a control rod, the first valve and the second valve are respectively hinged at both ends of the valve plate, and the control rod is connected to the valve plate and close to the first valve or the second valve, so that the first valve or the second valve can be synchronously operated by the lever principle through the up and down movement of the control rod.

[0012] Optionally, the lifting mechanism is configured to drive the control rod to move synchronously with the upper end connecting part.

[0013] Optionally, the lifting mechanism includes a hoist, a transmission unit and a hoisting beam, the hoist drives the hoisting beam to rise and fall through the transmission unit, and the control rod is connected to the hoisting beam.

[0014] Optionally, the control rod includes a first part connected to the lifting beam, a second part connected to the valve plate, and an adjusting part connecting the first part and the second part, and the adjusting part is slidably connected to at least one of the first part and the second part along the extension direction of the control rod.

[0015] According to the technical solution of the present application, the initial rainwater can be filtered through the fiber bundle filter element module of the downward flow reverse particle size filtration device, and the initial rainwater input through the water inlet pipe that can spray downward at an angle can flush the fiber bundle filter element module, thereby extending the working cycle of the fiber bundle filter element module, which is suitable for providing longer-term and stable filtration treatment for the initial rainwater.

[0016] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings constituting a part of the present application are used to provide a further understanding of the present application, and the schematic implementation modes and descriptions of the present application are used to explain the present application. In the accompanying drawings:

[0018] Figure 1 It is a front view of an initial rainwater filtration device according to an embodiment of the present application;

[0019] Figure 2 for Figure 1 The front view of the initial rainwater filtration equipment in the flushing state;

[0020] Figure 3 for Figure 1 A top view of

[0021] Figure 4 For explanation Figure 1 A top view of the water inlet pipe layout;

[0022] Figure 5 For explanation Figure 1 A top view of the flushing water pipeline layout;

[0023] Figure 6 for Figure 1 A partial enlarged view of the middle control lever. DETAILED DESCRIPTION

[0024] The technical solution of the present application will be described in detail below with reference to the accompanying drawings and in combination with the implementation modes.

[0025] The present application provides an initial rainwater filtration device, wherein the initial rainwater filtration device includes a treatment tank 100, a downward flow reverse particle size filter device 200 and a water inlet device 300, the downward flow reverse particle size filter device 200 includes a plurality of fiber bundle filter element modules 210 arranged in the treatment tank 100, and the water inlet device 300 includes a plurality of water inlet pipes 310 arranged around the treatment tank 100 to input initial rainwater into the treatment tank 100, and at least a portion of the water inlet pipes 310 is arranged to spray downwardly at an angle relative to a horizontal plane so as to be able to flush the fiber bundle filter element module 210.

[0026] Using the initial rainwater filtration equipment of the present application, the initial rainwater can be filtered through the fiber bundle filter element module 210 of the downward flow reverse particle size filtration device 200, and the initial rainwater input through the water inlet pipe 310 that can spray downward at an angle can flush the fiber bundle filter element module 210, thereby extending the working cycle of the fiber bundle filter element module 210, which is suitable for providing longer-term and stable filtration treatment for the initial rainwater.

[0027] In order to provide more effective flushing of the fiber bundle filter element module 210 through the water inlet pipe 310 spraying downwardly, the inclination angle of the water inlet pipe 310 can be reasonably set. Preferably, at least a portion of the water inlet pipe 310 (i.e., the water inlet pipe 310 spraying downwardly) is at an angle of 10°-20° with the horizontal plane, and more preferably, the angle is 15°.

[0028] In order to quickly and evenly input the initial rainwater to be treated into the treatment pool 100, a plurality of water inlet pipes 310 may be arranged around the treatment pool 100. Specifically, the cross section of the treatment pool 100 may be rectangular, and the water inlet pipes 310 include two opposite groups arranged along the four sides of the rectangle, and at least one group of the water inlet pipes 310 is arranged to spray downwardly with respect to the horizontal plane. In order to take into account both the transportation and flushing efficiency, preferably, a group of water inlet pipes 310 ( Figure 1 The first water inlet pipe 310a in the embodiment is configured to spray downwardly with respect to the horizontal plane so as to flush the fiber bundle filter element module 210; the other set of water inlet pipes 310a sprays horizontally ( Figure 1 A second water inlet pipe 310b) is provided in the middle to quickly input the initial rainwater to be treated.

[0029] It can be understood that in order to provide a good flushing effect, the water inlet pipe 310 can be set in the upper part of the treatment tank 100 near the top opening, so as to utilize the falling of the input rainwater to enhance the flushing effect and ensure that the fiber bundle filter element module 210 is flushed as a whole along the height direction of the fiber bundle filter element module 210.

[0030] In addition, for ease of layout, such as Figure 1 and Figure 4 As shown, the water inlet device 300 may include an annular water distribution pipe 320, and the water inlet pipe 310 is arranged on the annular water distribution pipe 320. The annular water distribution pipe 320 is connected to the water inlet pump 340 through the water inlet pipe 330, and the initial rainwater (for example, the initial rainwater collected in the initial rainwater collection tank L) is lifted to the water delivery pipe 330 by the water inlet pump 340, and then flows into the annular water distribution pipe 320 and is sprayed into the treatment tank 100 through the water inlet pipe 310. The annular water distribution pipe 320 can be fixed on the inner wall of the treatment tank 100 by a bracket 350.

[0031] In the present application, the downward flow reverse particle size filter device 200 is used to filter the initial rainwater flowing from top to bottom. In the filtering state, the fiber bundle is compressed. Under the action of gravity, the compactness of the lower part of the fiber bundle filter element module 210 is greater than that of the upper part, and its filtering gap gradually decreases from top to bottom, forming a downward flow reverse particle size filter. While ensuring the filtering accuracy, the pollution holding capacity of the filter layer is greatly increased, and the working efficiency of the downward flow reverse particle size filter device 200 is correspondingly improved. Among them, the fiber bundle filter element module 210 can be in an appropriate form, for example, it can include a semi-elastic fiber bundle filler with a strip-shaped connecting rope (such as a semi-elastic fiber bundle, etc.), a soft fiber bundle filler with a connecting rope (such as a braided fiber bundle, etc.). The upper and lower ends of the above filler connecting rope are respectively fixed to the upper end connecting part 220 and the lower end connecting part 250. Even if high-intensity flushing is performed, the filler will not be lost, and the facility maintenance cost is correspondingly reduced.

[0032] In order to facilitate flushing of the fiber bundle filter element module 210 as required, according to an embodiment of the present application, Figure 1 and Figure 2 As shown, the downward flow reverse particle size filter device 200 may include an upper connecting portion 220 and a lower connecting portion 250 respectively fixedly connected to the two ends of the fiber bundle filter element module 210, and the lower connecting portion 250 is fixed in the pool body 100. The downward flow reverse particle size filter device 200 includes a lifting mechanism 230 for lifting the upper connecting portion 220, so that each of the fiber bundle filter element modules 210 is configured to be switchable between a filtering state in which the fiber bundle is compressed and a flushing state in which the fiber bundle is fluffy, so that the fiber bundle filter element module 210 can be switched to a flushing state for flushing as needed.

[0033] When in use, when filtering is performed normally, the upper end connecting portion 220 can be driven down by the lifting mechanism 230, so that the fiber bundle of the fiber bundle filter element module 210 is folded and pressed. Figure 1 When flushing is required, the upper connecting portion 220 can be driven upward by the lifting mechanism 230, so that the fiber bundles of the fiber bundle filter element module 210 are stretched, so that the gaps between the fiber bundles become larger and fluffy, as shown. Figure 2 As shown, so that it can be flushed. It can be understood that by lowering the upper end connection part 220 to different heights, the fiber bundle can have different compression degrees, so that the compression degree and filtering effect of the fiber bundle can be adjusted by the lifting mechanism 230. The upper end connection parts 220 corresponding to each fiber bundle filter element module 210 can be fixed to each other by the connecting member 240, and the lifting mechanism 230 can drive the connecting member 240 to drive the upper end connection part 220.

[0034] In the flushing state, the fiber bundle filter element module 210 can be flushed in an appropriate manner. Figure 1 , Figure 2 and Figure 5 As shown, the initial rainwater filtration device may include an annular flushing pipe 400 surrounding each fiber bundle filter element module 210 of the downward flow reverse particle size filter device 200, and the annular flushing pipe 400 is provided with a flushing port toward the fiber bundle filter element module 210. The annular flushing pipe 400 is arranged around the outside of all fiber bundle filter element modules 210 and may be externally connected to a flushing water delivery pipe 410. Flushing water (e.g., flushing water in the pool W) may be delivered to the annular flushing pipe 400 through the flushing water delivery pipe 410 by a water pump 430, and then sprayed toward the fiber bundle filter element module 210 through the flushing port to achieve a flushing effect.

[0035] In order to enhance the flushing effect, multiple annular flushing pipes 400 may be arranged along the height direction, so that the fiber bundle filter element module 210 can be flushed through the multiple annular flushing pipes 400 during flushing. Figure 1 and Figure 2 As shown, the initial rainwater filtration device includes two annular flushing pipes 400 arranged in layers along the height direction of the treatment pool 100. To improve the flushing effect, the upper annular flushing pipe 400 is provided with a first flushing port that sprays downward at an angle of 20°-40° relative to the horizontal plane and a second flushing port that sprays horizontally, and the lower annular flushing pipe 400 is provided with a third flushing port that sprays horizontally. The flushing effect can be enhanced through the first flushing port, and the horizontal spraying of the second and third flushing ports can avoid interference with the inclined spraying of the first flushing port.

[0036] In addition, the first flushing port and the second flushing port can be reasonably arranged to achieve a flushing effect without dead angles while avoiding interference. For example, the annular flushing pipe 400 can be a rectangular shape consistent with the cross-sectional shape of the treatment tank 100, and two opposite groups of first flushing ports are arranged along a pair of opposite sides of the rectangle, and two opposite groups of second flushing ports are arranged along another pair of opposite sides of the rectangle.

[0037] It can be understood that in order to achieve a flushing effect without dead angles, the first flushing port and the water inlet pipe 310 that sprays downward at an angle are arranged along different sides of the rectangle, that is, two opposite groups of first flushing ports are arranged along a pair of opposite sides of the rectangle, and two opposite groups of water inlet pipes 310 are arranged along another pair of opposite sides of the rectangle.

[0038] The annular flushing pipe 400 can be fixed at an appropriate position of the treatment tank 100 so as to provide flushing by covering the stretched fiber bundle filter element module 210 as much as possible through the annular flushing pipes 400 at different heights. Since the lower part of the fiber bundle filter element module 210 plays a major filtering role during the downward flow reverse particle size filtration, it is necessary to focus on cleaning the lower part of the fiber bundle filter element module 210, and the upper annular flushing pipe 400 should not be lower than the middle position of the stretched fiber bundle filter element module 210.

[0039] Since filtering and flushing are different working conditions, the water quality of the filtered water and flushing water generated is different and needs to be discharged separately. For this reason, the bottom of the treatment pool 100 is provided with a filtered water outlet (connected to the filtered water discharge pipe 600) for discharging the filtered rainwater and a flushing water outlet (connected to the flushing water discharge pipe 700) for discharging the flushing water, and the initial rainwater filtering equipment may include a valve device 500 for synchronously operating the opening and closing of the filtered water outlet and the flushing water outlet, so that when one of the filtered water outlet and the flushing water outlet is opened, the other is closed at the same time. When in use, when filtering is performed, the valve device 500 opens the filtered water outlet and closes the flushing water outlet, and the filtered rainwater is discharged through the filtered water outlet and the filtered water discharge pipe 600; when flushing is performed, the valve device 500 opens the flushing water outlet and closes the filtered water outlet, and the flushing wastewater is discharged through the flushing water outlet and the flushing water discharge pipe 700.

[0040] The valve device 500 may be in a suitable form to achieve the effect of synchronous control. Figure 1 As shown, the valve device 500 includes a first valve 510 for closing the filtered water outlet, a second valve 520 for closing the flushing water outlet, a valve plate 530 and a control rod 540. The first valve 510 and the second valve 520 are respectively hinged at two ends of the valve plate 530. The control rod 540 is connected to the valve plate 530 and close to the first valve 510 or the second valve 520, so that the first valve 510 or the second valve 520 can be synchronously operated by the lever principle through the up and down movement of the control rod 540. When in use, when the control rod 540 moves in one direction, the second valve 520 can be closed to close the flushing water outlet and the first valve 510 can be opened to open the filtered water outlet, and filtering treatment is performed at this time; when the control rod 540 moves in the opposite direction, the first valve 510 can be closed to close the filtered water outlet and the second valve 520 can be opened to open the flushing water outlet, and flushing is performed at this time.

[0041] In order to facilitate the operation of the valve device 500 when switching the state of the downward flow reverse particle size filter device 200, the lifting mechanism 230 can be configured to drive the control rod 540 to move synchronously with the upper end connection part 220. That is, when the lifting mechanism 230 drives the fiber bundle filter element module 210 to descend to the filtering state, the control rod 540 moves downward to make the first valve 510 open the filtered water outlet and the second valve 520 close the flushing water outlet; when the lifting mechanism 230 drives the fiber bundle filter element module 210 to rise to the flushing state, the control rod 540 moves upward to make the second valve 520 open the flushing water outlet and the first valve 510 close the filtered water outlet.

[0042] The lifting mechanism 230 can be used in an appropriate manner to drive the fiber bundle filter element module 210 and the control rod 540 to rise and fall synchronously. Figure 1 As shown, the lifting mechanism 230 may include a gate hoist 231, a transmission unit and a hoisting beam 232. The gate hoist 231 drives the hoisting beam 232 to rise and fall through the transmission unit, and the control rod 540 is connected to the hoisting beam 232. The hoisting beam 232 may be connected to the upper end connection part 220 through a plurality of hoisting ropes 235. In addition, a stopper S for preventing the upper end connection part 220 from rising too much may also be provided on the side wall of the treatment pool 100.

[0043] The gate hoist 231 can be a multi-purpose electric (manual) gate hoist, which has an adjustable lifting height and multiple uses, reducing the number of I / O points, thereby simplifying the automatic control system and reducing the equipment failure rate. The transmission unit can be in an appropriate form, for example, it can include a main transmission gearbox 233, a sub-transmission gearbox 234, etc. The gate hoist 231 is connected to the sub-transmission gearbox 234 through the main transmission gearbox 233 (for example, through a transmission rod 237), and the sub-transmission gearbox 234 is connected to the hoisting beam 232 through the hoisting beam control rod 236.

[0044] In order to cooperate with the state switching of the downward flow reverse particle size filter device 200, the stroke of the control rod 540 and the lifting range of the fiber bundle filter element module 210 need to match, so as to synchronously switch the valve device 500. To this end, the control rod 540 may include a first portion 541 connected to the lifting beam 232, a second portion 542 connected to the valve plate 530, and an adjustment portion 543 connecting the first portion 541 and the second portion 542, and the adjustment portion 543 and at least one of the first portion 541 and the second portion 542 may be slidably connected along the extension direction of the control rod 540.

[0045] The adjusting portion 543 may be in a suitable form, for example, Figure 6As shown, the adjusting part 543 can be in the form of a sleeve, and the top wall and the bottom wall are respectively provided with a first mounting hole 5431 and a second mounting hole 5432 for connecting the first part 541 and the second part 542. The end of the first part 541 extends into the sleeve and is provided with a threaded section 5411. The positioning nut 544 installed on the threaded section 5411 can position the stop plate 546, and the stop plate 546 can stop at the first mounting hole 5431. The second part 542 is fixed (for example, by a fixing nut 545) to the second mounting hole 5432. In the initial stage of rising of the upper connecting part 220, the threaded section 5411 slides upward relative to the adjusting part 543, and the second part 542 remains stationary until the stop plate 546 stops at the first mounting hole 5431, and the control rod 540 as a whole rises with the fiber bundle filter element module 210 and operates the valve device 500; in the initial stage of descending of the upper connecting part 220, the threaded section 5411 slides downward relative to the adjusting part 543, and the second part 542 remains stationary until the threaded section 5411 contacts the second part 542 and other parts of the adjusting part 543, and the control rod 540 as a whole descends with the fiber bundle filter element module 210 and operates the valve device 500. The position of the positioning nut 544 on the threaded section 5411 can be adjusted according to the lifting range of the fiber bundle filter element module 210 to ensure that when the fiber bundle filter element module 210 is extended into place, the valve device 500 is switched to the state of discharging flushing water, and when the fiber bundle filter element module 210 is compressed into place, the valve device 500 is switched to the state of discharging filtered water, thereby avoiding delays in the lifting and lowering of the fiber bundle filter element module 210 and the switching of the valve device 500.

[0046] The pool W can be used to collect rainwater filtered by the initial rainwater filtering device, and the pool W can also be connected to an appropriate water body or artificial wetland through a pipeline. The flushing water can come from an appropriate water source, for example, rainwater filtered by the initial rainwater filtering device, that is, the filtered water discharge pipe 600 can be connected to the pool W.

[0047] In addition, a walkway plate 800 for walking can also be provided on the top of the treatment pool 100, so that personnel can maintain the treatment pool 100 and its internal components. An overflow pipe 900 can also be provided on the upper part of the treatment pool 100 to discharge the fluid in the treatment pool 100 by overflow, for example, to the initial rainwater collection tank L. A liquid level meter P can be provided in the treatment pool 100 to monitor the internal liquid level. The lifting mechanism 230 can be controlled accordingly according to the feedback of the liquid level meter P.

[0048] The operation of the initial rainwater filtration device of the present application is described below with reference to the accompanying drawings.

[0049] Filtration treatment: Before starting filtration, ensure that the fiber bundle filter element module 210 is lowered to the required compression state, and the first valve 510 opens the filtered water outlet and the second valve 520 closes the flushing water outlet. During filtration, the initial rainwater collected in the initial rainwater collection pool L is lifted to the water delivery pipe 330 by the water inlet pump 340, and then flows into the annular water distribution pipe 320 and is sprayed into the treatment pool 100 through the water inlet pipe 310. While entering the water, the fiber bundle filter element module 210 is flushed. After the initial rainwater is filtered by the fiber bundle filter element module 210, it is discharged to the pool W through the filtered water outlet and the filtered water discharge pipe 600, and then can be discharged to the water body or artificial wetland. The filtration cycle can be controlled by a liquid level meter P, that is, when the liquid level in the treatment pool 100 reaches a predetermined height, the initial rainwater is stopped from being transported to the treatment pool 100.

[0050] Flushing treatment: When the liquid level meter P detects that the liquid level in the treatment tank 100 rises to the flushing water level or the filtration treatment is completed and needs to be flushed, the flushing treatment is performed. When switching from filtration treatment to flushing treatment, the water inlet pump 340 is turned off, and the liquid level in the treatment tank 100 drops to the set water level or stabilizes for a certain period of time (avoid flushing when too much filtered water is retained, thereby reducing the discharge of flushing wastewater), the hoisting beam 232 is driven by the hoisting machine 231 to drive the upper end connection part 220 to rise, the initial threaded section 5411 slides upward relative to the adjustment part 543, and the second part 542 remains stationary until the stopper 546 stops at the first mounting hole 5431, and the control rod 540 as a whole rises with the fiber bundle filter element module 210. When the upper end connection part 220 rises to the position to make the fiber bundle fully stretched and fluffy, the first valve 510 just closes the filtered water outlet and the second valve 520 makes way for the flushing water outlet. At the same time, the water pump 430 is turned on to deliver the water in the pool W to the annular flushing pipe 400 through the flushing water delivery pipe 410, and then sprayed to the fiber bundle filter element module 210 through the flushing port to achieve a flushing effect. The flushed wastewater is discharged through the flushing water outlet and the flushing water discharge pipe 700, for example, to a sewage pipe. The flushing cycle can be set according to the pollution degree of the initial rainwater.

[0051] After the flushing process is completed, the hoisting beam 232 is driven by the hoisting machine 231 to drive the upper end connection part 220 to descend to the fiber bundle to be compacted in preparation for the next filtering process. In the initial stage of descent, the threaded section 5411 slides downward relative to the adjusting part 543, and the second part 542 remains stationary until the threaded section 5411 contacts the second part 542 and other parts of the adjusting part 543, and the control rod 540 as a whole descends with the fiber bundle filter element module 210. When the upper end connection part 220 is lowered into place to compact the fiber bundle, the second valve 520 just closes the flushing water outlet and makes the first valve 510 open the filtered water outlet.

[0052] The preferred embodiments of the present application are described in detail above; however, the present application is not limited to the specific details in the above embodiments. Within the technical concept of the present application, a variety of simple modifications can be made to the technical solution of the present application, and these simple modifications all fall within the protection scope of the present application.

[0053] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not further describe various possible combinations.

[0054] In addition, the various implementation modes of the present application may be arbitrarily combined, and as long as they do not violate the concept of the present application, they should also be regarded as the contents disclosed in the present application.

Claims

1. An initial rainwater filtration device, characterized in that: The initial rainwater filtration equipment comprises a treatment tank (100), a downward flow reverse particle size filtration device (200) and a water inlet device (300), wherein the downward flow reverse particle size filtration device (200) comprises a plurality of fiber bundle filter element modules (210) arranged in the treatment tank (100), and the water inlet device (300) comprises a plurality of water inlet pipes (310) for inputting initial rainwater into the treatment tank (100), and at least a part of the water inlet pipes (310) is arranged to spray downwardly at an angle relative to a horizontal plane so as to flush the fiber bundle filter element modules (210).

2. The initial rainwater filtering device according to claim 1, characterized in that: At least a portion of the water inlet pipe (310) is at an angle of 10°-20° with the horizontal plane; and / or, The treatment pool (100) has a rectangular cross-section, and the water inlet pipes (310) include two opposite groups arranged along the four sides of the rectangle, and at least one group of the water inlet pipes (310) is arranged to spray downwardly at an angle relative to a horizontal plane.

3. The initial rainwater filtering device according to claim 1 or 2, characterized in that: The downward flow reverse particle size filter device (200) comprises an upper connecting portion (220) and a lower connecting portion (250) respectively fixedly connected to two ends of the fiber bundle filter element module (210), the lower connecting portion (250) being fixed in the treatment tank (100), and the downward flow reverse particle size filter device (200) comprises a lifting mechanism (230) for lifting the upper connecting portion (220).

4. The initial rainwater filtering device according to claim 3, characterized in that: The initial rainwater filtration equipment comprises an annular flushing pipe (400) surrounding each fiber bundle filter element module (210) of the downward flow reverse particle size filtration device (200), and the annular flushing pipe (400) is provided with a flushing port facing the fiber bundle filter element module (210).

5. The initial rainwater filtering device according to claim 4, characterized in that: The initial rainwater filtration device comprises two annular flushing pipes (400) arranged in layers along the height direction of the treatment pool (100), the upper annular flushing pipe (400) being provided with a first flushing port for spraying downward at an angle of 20°-40° relative to the horizontal plane and a second flushing port for spraying horizontally, and the lower annular flushing pipe (400) being provided with a third flushing port for spraying horizontally.

6. The initial rainwater filtering device according to claim 4, characterized in that: The bottom of the treatment pool (100) is provided with a filtered water outlet for discharging filtered rainwater and a flushing water outlet for discharging flushing water. The initial rainwater filtering equipment includes a valve device (500) for synchronously operating the opening and closing of the filtered water outlet and the flushing water outlet, so that when one of the filtered water outlet and the flushing water outlet is opened, the other is closed at the same time.

7. The initial rainwater filtering device according to claim 6, characterized in that: The valve device (500) comprises a first valve (510) for closing the filtered water outlet, a second valve (520) for closing the flushing water outlet, a valve plate (530) and a control rod (540), wherein the first valve (510) and the second valve (520) are respectively hinged at two ends of the valve plate (530), and the control rod (540) is connected to the valve plate (530) and is close to the first valve (510) or the second valve (520), so as to synchronously operate the first valve (510) or the second valve (520) by using the lever principle through the up and down movement of the control rod (540).

8. The initial rainwater filtering device according to claim 7, characterized in that: The lifting mechanism (230) is configured to be able to drive the control rod (540) to move synchronously with the upper end connecting portion (220).

9. The initial rainwater filtering device according to claim 8, characterized in that: The lifting mechanism (230) comprises a hoist (231), a transmission unit and a hoisting beam (232); the hoist (231) drives the hoisting beam (232) to rise and fall via the transmission unit; and the control rod (540) is connected to the hoisting beam (232).

10. The initial rainwater filtering device according to claim 9, characterized in that: The control rod (540) includes a first portion (541) connected to the lifting beam (232), a second portion (542) connected to the valve plate (530), and an adjusting portion (543) connecting the first portion (541) and the second portion (542), wherein the adjusting portion (543) is slidably connected to at least one of the first portion (541) and the second portion (542) along an extension direction of the control rod (540).

Images