Water-cutting-off-free graded backwashing type wetland and backwashing method

Abstract

The invention discloses a water-cutting-off-free graded backwashing type wetland and a backwashing method. The wetland at least comprises a liftable module wetland system, a backwashing and backwashing water purification system and a backwashing hoisting system; the module wetland system capable of being hoisted at least comprises a wetland frame and a plurality of module wetlands capable of being hoisted, wherein the module wetlands capable of being hoisted are arranged in the wetland frame; and the backwashing hoisting system is used for hoisting any one liftable module wetland to the backwashing and backwashing water purification system for purification, and hoisting the module wetland to the original position after purification. According to the invention, all module wetlands share one ectopic backwashing tank in a centralized manner, and backwashing water is effluent of the wetlands, so that the construction investment of backwashing engineering is saved; the device has the characteristic of backwashing without cutting off water, and does not influence normal water quality purification operation of other module wetlands.

Description

Technical Field

[0001] The invention relates to a non-stop water graded backwashing type wetland and a backwashing method. Background Art

[0002] Artificial wetlands refer to projects that simulate the structure and function of natural wetlands, artificially distribute low-polluted water into a unique ecosystem composed of fillers (including soil) and aquatic plants, animals and microorganisms, and improve water quality through physical, chemical and biological synergistic effects. Artificial wetlands are divided into surface flow artificial wetlands and subsurface flow artificial wetlands according to the positional relationship between fillers and water. Among them, subsurface flow artificial wetlands have high treatment load and low treatment and operation costs, and are widely used in the water purification of sewage treatment plant effluent, slightly polluted river water, farmland drainage and similar low-polluted water. However, in actual operation, the problem of filler blockage in subsurface flow artificial wetlands is a common problem. Although the modular detachable artificial wetland system and its subsurface flow artificial wetland assembly (CN207210196U) are modular installed wetlands, they are still the traditional anti-filler blockage solution of "replace where the filler is blocked". A modularized river in-situ purification wetland with self-flushing function (CN113735274A) provides a new modularized river in-situ purification wetland with self-flushing function, which better realizes the self-flushing of the river in-situ purification wetland, and is mainly used for river in-situ wetland treatment. For more widely used water with different properties, especially high suspended matter water, there is no effective solution to the problem of wetland filler blockage. Summary of the invention

[0003] In order to overcome the above-mentioned defects, the object of the present invention is to provide a non-stop water graded backwashing wetland and a backwashing method.

[0004] In order to achieve the above-mentioned object, the non-stop water graded backwashing wetland of the present invention comprises at least a hoistable module wetland system, a backwashing and backwashing water purification system, and a backwashing hoisting system;

[0005] The hoistable modular wetland system at least comprises a wetland frame and a plurality of hoistable modular wetlands arranged in the wetland frame;

[0006] The backwash hoisting system is used to hoist any hoistable module wetland to the backwash and backwash water purification system for backwashing, and hoist it back to its original position after backwashing.

[0007] Furthermore, the wetland also includes a backwash control system, which is used to detect blockage of each hoistable module wetland, and after detecting blockage, control the backwash hoisting system to hoist the blocked hoistable module wetland to the backwash and backwash water purification system for backwashing, and hoist it back to its original position after backwashing.

[0008] Furthermore, the wetland frame includes an inlet side and an outlet side that are arranged opposite to each other; the wetland frame is divided into a front treatment area, a middle treatment area and a rear treatment area from the inlet side to the outlet side;

[0009] Each modular wetland includes a modular wetland frame, the wetland frame is coated with a modular wetland filler net; the modular wetland filler net is filled with modular wetland fillers;

[0010] Among them, the particle size of the modular wetland filler in the modular wetland in the front-end treatment area>the particle size of the modular wetland filler in the modular wetland in the middle-end treatment area>the particle size of the modular wetland filler in the modular wetland in the back-end treatment area.

[0011] Furthermore, the modular wetland frame is provided with lifting ears.

[0012] Furthermore, the backwash and backwash water purification system includes a backwash system and an air flotation system; the backwash system includes a backwash tank, a backwash air inlet pipe and a backwash air inlet valve, a backwash water inlet pipe and a backwash water inlet valve; the backwash tank includes from bottom to top a bottom water inlet layer, a bottom partition, a backwash water distribution pipe, a supporting layer, a backwash top sealing edge, and a backwash drainage weir, a backwash drainage trough, and a backwash drainage pipe;

[0013] The air flotation system comprises an air flotation tank which is connected to one side of the backwashing tank.

[0014] Furthermore, the backwash tank and the flotation tank are arranged side by side on one side of the wetland frame.

[0015] Furthermore, the backwash hoisting system is movably arranged above the backwash tank, the air flotation tank, and the wetland frame; the backwash hoisting system comprises:

[0016] Tracks are respectively arranged on the water inlet side and the water outlet side of the wetland frame; the track extends to one side above the backwash tank and the flotation tank;

[0017] A mobile gantry crane is straddled on the track.

[0018] Further, the backwash control system includes a micro-flow rate detection device provided on the water outlet side of each module wetland, for detecting the flow rate of each module wetland in real time;

[0019] A control device is used to receive data from each micro-flow velocity detection device in real time, and compare the received data with a preset flow velocity threshold. When the detected flow velocity is less than the preset flow velocity threshold, a control signal and the corresponding module wetland number are output.

[0020] To achieve the above-mentioned purpose, the present invention provides a backwashing method for a non-stop water graded backwashing wetland, comprising:

[0021] (1) Real-time monitoring of the outflow velocity of each module wetland;

[0022] (2) When the detected flow rate is less than a preset flow rate threshold, a control signal and the corresponding module wetland number are output;

[0023] (3) The backwash hoisting system is in operation to hoist the blocked module wetland to the backwash tank, while other module wetlands that have not been hoisted remain in the purification working state;

[0024] (4) The blocked modular wetland is hoisted into the backwash tank and placed on the supporting layer, and then the backwash top seal is installed on the upper part of the backwash tank. One side of the backwash top seal is fixed to the side wall of the backwash tank, and the other side is fixed to the top frame of the modular wetland frame. The fixing method is to use a water stop strip and a nut. In this way, the gap between the backwash tank and the modular wetland is closed to ensure that the backwash gas-water mixture can only flow upward through the modular wetland;

[0025] (5) Open the backwash air inlet valve, backwash water inlet valve, and air flotation system to backwash the blocked module wetland and purify the backwash water. Here, graded flushing is adopted for different types of module wetlands. The coarse-grained module wetland adopts a large backwash water inlet and air inlet, the medium-grained filler module wetland adopts a medium backwash water inlet and air inlet, and the fine-grained module wetland adopts a small backwash water inlet and air inlet;

[0026] (6) Close the backwash air inlet valve, backwash water inlet valve, and air flotation system, and disassemble the backwash top sealing edge;

[0027] (7) Starting the backwash hoisting system, and using the hoisting rope to hoist the backwashed modular wetland back to its original position in the hoistable modular wetland system.

[0028] The present invention is suitable for wetland treatment of water with high suspended matter content and has the following advantages:

[0029] 1. Compared with the overall backwash system in the wetland treatment area, the present invention configures the backwash system in an intensive manner, that is, all the module wetlands share a common off-site backwash pool, and the backwash water is the wetland effluent, which saves the investment in backwash engineering construction;

[0030] 2. The present invention sets a graded backwashing mode according to the characteristics of the wetland water purification process of coarse particle size in the front section, medium particle size in the middle section, and fine particle size in the back section, and performs graded backwashing on fillers of different particle sizes (coarse particle size fillers in module wetland, medium particle size fillers in module wetland, and fine particle size fillers in module wetland), so as to achieve efficient and energy-saving backwashing of the module wetland;

[0031] 3. The present invention has the characteristic of non-stop water backwashing, that is, when a certain module wetland is in a backwashing state, it will not affect the normal water purification operation of other module wetlands. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a plan view of the module wetland purification, the backwashing of a module wetland and the flushing water purification working conditions corresponding to the embodiment 1 of the non-stop water graded backwashing wetland of the present invention;

[0033] Figure 2 It is a plan view of the purification working condition of a module wetland corresponding to Example 1 of a non-stop water graded backwashing wetland of the present invention;

[0034] Figure 3 It is a schematic diagram of a modular grid frame structure corresponding to Example 1 of a non-stop water graded backwashing wetland of the present invention;

[0035] Figure 4 It is a schematic top view of a modular grid frame corresponding to Example 1 of a non-stop water graded backwashing wetland of the present invention;

[0036] Figure 5 It is a schematic diagram of the backwashing pool structure corresponding to Example 1 of a non-stop water graded backwashing wetland of the present invention;

[0037] Figure 6 It is a schematic diagram of the structure of a module wetland installed in a backwash tank corresponding to Example 1 of a non-stop water graded backwash wetland of the present invention.

[0038] Air flotation outlet valve 1, track 2, air flotation pool 3, crane 4, lifting rope 5, backwash pool 6, modular wetland coarse-grained filler 701, modular wetland medium-grained filler 702, modular wetland fine-grained filler 703, modular wetland lifting lugs 801 to 804, backwash air inlet valve 9, backwash air inlet pipe 10, wetland water collection hole 11, hoistable modular wetland 12, wetland water collection channel 13, wetland partition wall 14, backwash water inlet pipe 15, water pump 16, backwash water inlet valve 17, wetland Outlet main pipe 18, module wetland frame 19, large-aperture module wetland filler net 2001, medium-aperture module wetland filler net 2002, small-aperture module wetland filler net 2003, wetland water distribution hole 21, wetland water distribution channel 22, wetland water inlet main pipe 23, backwash drainage weir 24, backwash drainage trough 25, backwash drainage pipe 26, supporting layer 27, bottom partition layer 28, bottom water inlet layer 29, backwash water distribution pipe 30, backwash top sealing edge 31, micro flow rate detection device 32 DETAILED DESCRIPTION

[0039] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0040] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] like Figure 1-6 As shown, the present invention provides a non-stop water graded backwashing wetland.

[0044] The wetland includes a hoistable module wetland system, a backwash and backwash water purification system, a backwash hoisting system, and a backwash control system.

[0045] The backwash and backwash water purification system is connected in parallel with the hoistable modular wetland system. The backwash hoisting system hoists a certain module wetland of the hoistable modular wetland system to the backwash and backwash water purification system for backwashing, and hoists it back to its original position in the hoistable modular wetland system after the backwashing is completed;

[0046] The hoistable modular wetland system is composed of modular wetlands, each of which includes a modular wetland frame 19, modular wetland lifting ears 801 to 804, a modular wetland filler net, and a modular wetland filler; the front-end treatment area is arranged with a large-aperture modular wetland filler net 2001 corresponding to the coarse-grained filler 701 of the modular wetland, the middle-end treatment area is arranged with a medium-aperture modular wetland filler net 2002 corresponding to the medium-grained filler 702 of the modular wetland, and the rear-end treatment area is arranged with a small-aperture modular wetland filler net 2003 corresponding to the fine-grained filler 703 of the modular wetland;

[0047] The backwash and backwash water purification system includes a backwash system and an air flotation system; the backwash system includes a backwash tank 6, a backwash air inlet pipe 10 and a backwash air inlet valve 9, a backwash water inlet pipe 15 and a backwash water inlet valve 17; the backwash tank 6 includes from bottom to top a bottom water inlet layer 29, a bottom partition layer 28, a backwash water distribution pipe 30, a supporting layer 27, a backwash top sealing edge 31, a backwash drainage weir 24, a backwash drainage trough 25, and a backwash drainage pipe 26;

[0048] The backwash drain pipe 26 is connected to the flotation tank 3;

[0049] The backwash hoisting system is a mobile gantry crane installed on the backwash and backwash water purification system and the hoistable module wetland system, including a track 2 installed on the wetland frame; the track extends upstream to the backwash tank and the flotation tank; the mobile gantry beam moves along the track (not shown in the figure), and the crane 4 moves back and forth along the mobile gantry beam; the crane 4 hoists the module wetland through a hoist or a hoisting rope 5; to ensure that each module wetland can be hoisted to the backwash tank 6, and after the module wetland is flushed, it is hoisted back to its original position in the hoistable module wetland system;

[0050] The backwash control system includes a micro-flow rate detection device 32 and a control center;

[0051] When the micro-flow rate detection device 32 detects that the flow rate of a module wetland is lower than a specific value, the backwashing process of the module wetland is started, and the steps include:

[0052] (1) The backwash hoisting system is controlled by the control center to operate, and the blocked module wetland is hoisted to the backwash tank 6 by the hoisting rope 5. At this time, other module wetlands that have not been hoisted still maintain the purification working state, and then enter step (2);

[0053] (2) The blocked module wetland is hoisted into the backwash tank 6 and placed on the supporting layer 27. Then, the backwash top seal 31 on the upper part of the backwash tank 6 is installed. One side of the backwash top seal 31 is fixed to the side wall of the backwash tank 6, and the other side is fixed to the top frame of the module wetland frame 19. The fixing method is to use a water stop strip and a nut. In this way, the gap between the backwash tank 6 and the module wetland is closed to ensure that the backwash gas-water mixture can only flow upward through the module wetland, and then proceed to step (3);

[0054] (3) Open the backwash air inlet valve 9, the backwash water inlet valve 17, and the air flotation system to backwash the blocked module wetland and purify the backwash water. Here, graded flushing is adopted for different types of module wetlands. The coarse-grained module wetland adopts a large backwash water inlet and air inlet, the medium-grained filler module wetland adopts a medium backwash water inlet and air inlet, and the fine-grained module wetland adopts a small backwash water inlet and air inlet;

[0055] (4) Close the backwash air inlet valve 9, the backwash water inlet valve 17, and the air flotation system, and disassemble the backwash top sealing edge 31;

[0056] (5) Start the backwashing hoisting system and use the hoisting rope 5 to hoist the backwashed modular wetland back to its original position in the hoistable modular wetland system.

[0057] The present invention is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of ordinary technicians in the field without departing from the purpose of the present invention. Many other changes and modifications that do not depart from the concept and scope of the present invention should be regarded as the protection scope of the present invention.

[0058] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0059] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A non-stop water graded backwashing wetland, characterized by: The wetland at least includes a hoistable module wetland system, a backwash and backwash water purification system, and a backwash hoisting system; The hoistable modular wetland system at least comprises a wetland frame and a plurality of hoistable modular wetlands arranged in the wetland frame; The backwash hoisting system is used to hoist any hoistable module wetland to the backwash and backwash water purification system for backwashing, and hoist it back to its original position after backwashing.

2. A non-stop water graded backwashing wetland as claimed in claim 1, characterized in that: The wetland also includes a backwash control system, which is used to detect blockage of each hoistable module wetland, and after detecting blockage, control the backwash hoisting system to hoist the blocked hoistable module wetland to the backwash and backwash water purification system for backwashing, and hoist it back to its original position after backwashing.

3. The non-stop water graded backwashing wetland according to claim 1, characterized in that: The wetland frame includes an inlet side and an outlet side that are arranged opposite to each other; the wetland frame is divided into a front treatment area, a middle treatment area and a rear treatment area from the inlet side to the outlet side; Each modular wetland includes a modular wetland frame, the wetland frame is coated with a modular wetland filler net; the modular wetland filler net is filled with modular wetland fillers; Among them, the particle size of the modular wetland filler in the modular wetland in the front-end treatment area>the particle size of the modular wetland filler in the modular wetland in the middle-end treatment area>the particle size of the modular wetland filler in the modular wetland in the back-end treatment area.

4. A non-stop water graded backwashing wetland as claimed in claim 3, characterized in that: The module wetland frame is provided with lifting ears.

5. The non-stop water graded backwashing wetland as claimed in claim 3, characterized in that: The backwash and backwash water purification system includes a backwash system and an air flotation system; the backwash system includes a backwash tank, a backwash air inlet pipe and a backwash air inlet valve, a backwash water inlet pipe and a backwash water inlet valve; the backwash tank includes from bottom to top a bottom water inlet layer, a bottom partition, a backwash water distribution pipe, a supporting layer, a backwash top sealing edge, a backwash drainage weir, a backwash drainage trough, and a backwash drainage pipe; The air flotation system comprises an air flotation tank which is connected to one side of the backwashing tank.

6. A non-stop water graded backwashing wetland as claimed in claim 5, characterized in that: The backwashing tank and the air flotation tank are arranged side by side on one side of the wetland frame.

7. A non-stop water graded backwashing wetland as claimed in claim 6, characterized in that: The backwash hoisting system is movably arranged above the backwash tank, the air flotation tank and the wetland frame; the backwash hoisting system comprises: Tracks are respectively arranged on the water inlet side and the water outlet side of the wetland frame; the track extends to one side above the backwash tank and the flotation tank; A mobile gantry crane is straddled on the track.

8. The non-stop water graded backwashing wetland according to claim 1, characterized in that: The backwash control system includes a micro-flow rate detection device provided on the outlet side of each module wetland, which is used to detect the flow rate of each module wetland in real time; A control device is used to receive data from each micro-flow velocity detection device in real time, and compare the received data with a preset flow velocity threshold. When the detected flow velocity is less than the preset flow velocity threshold, a control signal and the corresponding module wetland number are output.

9. A backwashing method for a non-stop water graded backwashing wetland, characterized in that: The method includes: (1) Real-time monitoring of the outflow velocity of each module wetland; (2) When the detected flow rate is less than a preset flow rate threshold, a control signal and the corresponding module wetland number are output; (3) The backwash hoisting system is in operation to hoist the blocked module wetland to the backwash tank, while other module wetlands that have not been hoisted remain in the purification working state; (4) The blocked modular wetland is hoisted into the backwash tank and placed on the supporting layer, and then the backwash top seal is installed on the upper part of the backwash tank. One side of the backwash top seal is fixed to the side wall of the backwash tank, and the other side is fixed to the top frame of the modular wetland frame. The fixing method is to use a water stop strip and a nut. In this way, the gap between the backwash tank and the modular wetland is closed to ensure that the backwash gas-water mixture can only flow upward through the modular wetland; (5) Open the backwash air inlet valve, backwash water inlet valve, and air flotation system to backwash the blocked module wetland and purify the backwash water. Here, graded flushing is adopted for different types of module wetlands. The coarse-grained module wetland adopts a large backwash water inlet and air inlet, the medium-grained filler module wetland adopts a medium backwash water inlet and air inlet, and the fine-grained module wetland adopts a small backwash water inlet and air inlet; (6) Close the backwash air inlet valve, backwash water inlet valve, and air flotation system, and disassemble the backwash top sealing edge; (7) Starting the backwash hoisting system, and using the hoisting rope to hoist the backwashed modular wetland back to its original position in the hoistable modular wetland system.

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