Modularized multi-stage collaborative water treatment device and method

Abstract

The invention discloses a modular multi-stage collaborative water treatment device and method, and relates to the technical field of drinking water treatment.The water treatment device comprises a biological slow filter, a grid flocculation mechanism, a mechanical coagulation mechanism, an inclined tube precipitation unit and an integrated membrane filtration mechanism, and five-stage water treatment processes are formed through collaborative operation of all the modules; according to the integrated membrane filtration mechanism, through cross-flow filtration and aeration of an ultrafiltration membrane, a spiral flow deflector capable of being automatically adjusted of the cleaning guide mechanism is matched to regulate and control water flow and bubble shear force of aeration, and pollutants attached to the ultrafiltration membrane are reduced, so that the cleaning period is prolonged, and the amount of purified water produced in a single filtration period is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of drinking water treatment, and specifically to a modular multi-stage collaborative water treatment device and method. Background Art

[0002] In scenarios such as emergency water supply under complex water source conditions, centralized water supply in villages and towns, and industrial recycled water, when using a water treatment device to treat water, sudden water quality fluctuations are likely to occur, resulting in a sudden increase in process load, thereby causing unstable effluent water quality.

[0003] For traditional water treatment devices, when using ultrafiltration membranes for water treatment, the anti-pollution ability is weak. In the face of complex water sources, dirt is easily formed on the membrane surface, resulting in a rapid decline in flux. Usually, a backwash pump is used to self-clean the ultrafiltration membrane, resulting in downtime and affecting the efficiency of water treatment. Moreover, traditional water treatment devices cannot be adjusted in real time according to the influent water volume and water quality fluctuations of sewage, thereby resulting in poor sewage treatment effects and affecting the net water volume produced during the filtration cycle after a single cleaning. Summary of the Invention

[0004] The purpose of the present invention is to provide a modular multi-stage collaborative water treatment device and method to solve the problems raised in the prior art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: A modular multi-stage collaborative water treatment device, the water treatment device includes a treatment tank, a support base, a grid flocculation mechanism, a mechanical coagulation mechanism, inclined tubes, an integrated membrane filtration mechanism, a lifting mechanism, a cleaning guiding mechanism, and a sludge discharge pipe. The treatment tank and the support base are fixedly connected. The treatment tank is provided with a biological slow sand filter. The treatment tank is provided with a first treatment tank. The grid flocculation mechanism is placed in the first treatment tank. The mechanical coagulation mechanism is fixedly connected to the treatment tank. The treatment tank is provided with a second treatment tank. The inclined tubes are placed in the second treatment tank. The treatment tank is provided with a third treatment tank. The lifting mechanism is fixedly connected to the integrated membrane filtration mechanism. There are several cleaning guiding mechanisms, and several cleaning guiding mechanisms are fixedly connected to the lifting mechanism. The sludge discharge pipe is fixedly connected to the treatment tank.

[0006] The treatment tank is installed on the support base. Wheels are provided at the bottom of the support base to facilitate the movement of the device. The treatment tank is equipped with a biological slow sand filter. The water is preliminarily treated by filling biological slow sand filter media in the biological slow sand filter. The water after preliminary treatment is further treated by the grid flocculation mechanism in the first treatment tank, and then by the mechanical coagulation mechanism to mix the coagulant with the water, thereby removing suspended solids in the water. Then, through the inclined tubes in the second treatment tank, the solid particles in the water settle. Finally, through the integrated membrane filtration mechanism, clean water is filtered out. During the filtration process, the clean water guiding mechanism guides the water flow to generate a spiral, so that the water flow generates a shear force on the filtration membrane, thereby reducing the attachment of impurities to the filtration membrane. At the same time, the clean water guiding mechanism can adjust the magnitude of the shear force generated by the water flow in real time according to the water flow, avoiding sudden fluctuations in water quality and affecting the filtration effect. Through the lifting mechanism, the clean water guiding mechanism moves up and down to cooperate with the backwashing of the integrated membrane filtration mechanism to clean the filtration membrane, thereby enhancing the cleaning effect of the filtration membrane, reducing the residue of pollutants, prolonging the cycle of self-cleaning and manual disassembly and cleaning of the device, and improving the efficiency of water treatment. Mud is discharged regularly through the sludge discharge pipe.

[0007] Furthermore, the integrated membrane filtration mechanism includes a fixed seat, ultrafiltration membranes, a water collecting pipe, a water production pump, a backwashing pump, an air pump, and an air outlet pipe. There are several ultrafiltration membranes. The fixed seat is fixedly connected to several ultrafiltration membranes. Several ultrafiltration membranes are connected to the water collecting pipe through pipelines. The water production pump is connected to the water collecting pipe through pipelines. The backwashing pump is connected to the water collecting pipe through pipelines. There are several air outlet pipes. The air pump is connected to several air outlet pipes through pipelines. Several air outlet pipes are arranged at the bottom of the ultrafiltration membranes.

[0008] Several plate ceramic ultrafiltration membranes are fixed by the fixed seat. The water production pump is connected to the water collecting pipe through pipelines, and the water collecting pipe is connected to several ultrafiltration membranes through pipelines, enabling the water production pump to extract the water filtered by the ultrafiltration membranes, thereby forming a pressure difference to make the water flow from bottom to top, thus forming cross-flow filtration. The air pump is connected to the air outlet pipes at the bottom of the ultrafiltration membranes through pipelines, so that the air outlet pipes conduct aeration to generate bubbles. The bubbles rise to scour the filtration membrane, reducing the attachment of impurities to the filtration membrane. When the ultrafiltration membrane needs to be cleaned, the clean water is returned from the water collecting pipe to the ultrafiltration membrane through the backwashing pump, and the water flows out from the inside of the ultrafiltration membrane to the outside, thereby performing cleaning.

[0009] Further, the cleaning guiding mechanism includes an intercepting rod, a guiding unit, a brush roller, a baffle plate, a second slider, an annular spring, a guiding rod, and an adjusting unit. The intercepting rod is fixedly connected to the lifting mechanism. The intercepting rod is provided with a plurality of first through holes. There are a plurality of guiding units, and the plurality of guiding units are slidably connected to the first through holes. The intercepting rod is provided with an arc-shaped groove. The guiding rod is placed in the arc-shaped groove. The annular spring is sleeved outside the guiding rod. The second slider is slidably connected to the guiding rod. The baffle plate is fixedly connected to the second slider 85. There are four adjusting units, and there are two brush rollers. Each end of each brush roller is rotatably connected to the adjusting unit respectively.

[0010] Through the intercepting rod, water flows through the plurality of first through holes on the intercepting rod. Through the guiding unit, the flowing water and air bubbles generate spiral rotation, thereby forming a transverse shear force on the ultrafiltration membrane and flushing the pollutants on its surface, reducing the deposition of pollutants on the membrane surface, and thus reducing the membrane fouling rate. By setting the baffle plate, the baffle plate can slide along the arc-shaped groove under the action of the guiding rod. When the treated water quality is poor, the filtration speed is slow, and the pressure difference is small, the water only flows through the first through holes to ensure sufficient flow velocity so that the water flow can generate sufficient shear force. By arranging brush rollers on both sides of the intercepting rod, after one or more filtrations are completed, the lifting mechanism is started to move up and down to clean the membrane. The tension of the brush roller is adjusted through the cooperation of the adjusting unit 88 and the sliding baffle plate, thereby ensuring the cleaning effect.

[0011] Further, the guiding unit includes a flow guiding sheet, a fixing block, a first slider, and a first return spring. The flow guiding sheet is fixedly connected to the fixing block. The fixing block is fixedly connected to the first slider. The intercepting rod is provided with a first sliding groove. The first slider is slidably connected to the first sliding groove. The first return spring is placed in the first sliding groove. The flow guiding sheet is spiral, and the pitch of the flow guiding sheet gradually increases from bottom to top.

[0012] The flow guiding sheet is fixed through the fixing block. Both sides of the fixing block are fixed to the two first sliders. The first return spring placed in the first sliding groove provides a pre-tightening force for it, so that when the water flow becomes larger, the flow guiding sheet can slide upward, thereby automatically adjusting according to the water flow. Since the flow guiding sheet is spiral and the pitch of the flow guiding sheet gradually increases, the number of spiral turns gradually increases from bottom to top, thereby balancing the formed transverse shear force and avoiding damage to the membrane caused by excessive shear force.

[0013] Further, the lifting mechanism includes a first motor, a screw rod, a fourth slider, and a guide rail. The first motor is fixedly connected to the fixed seat. The output end of the first motor is fixedly connected to the screw rod. There are two fourth sliders. The two fourth sliders are fixedly connected to the intercepting rod. One fourth slider is provided with a threaded groove, and the threaded groove cooperates with the screw rod. The guide rail is slidably connected to the fourth slider.

[0014] The output end of the first motor is fixed to the screw, enabling the first motor to drive the screw to rotate. The two fourth sliders are fixed to the intercepting rod to support the intercepting rod. One of the fourth sliders is provided with a threaded groove that mates with the screw, enabling the fourth slider to slide vertically up and down along the guide rail.

[0015] Furthermore, the adjusting unit includes a third slider and a second return spring. The baffle is provided with an arc surface. The third slider is rotatably connected to the brush roller. The fourth slider is provided with a second sliding groove. The second return spring is placed inside the second sliding groove, and the third slider is slidably connected to the second sliding groove.

[0016] Due to the fourth slider being provided with a second sliding groove, the third slider can slide within the second sliding groove, enabling the fourth slider to drive the third slider and the brush roller to move up and down to clean the film. When there is a large amount of pollutants accumulated on the film and the resistance is high, when rising, the baffle slides downward and the arc surface contacts the brush roller, pushing the brush roller to move, thereby adjusting the cleaning effect of the brush roller on the film. The second return spring enables the brush roller to reset.

[0017] Furthermore, the grid flocculation mechanism includes a grid plate, a flocculator, and a base. The grid plate is placed inside the first treatment tank. The flocculator is spherical, with an empty cavity. The flocculator is provided with a second through hole that communicates with the empty cavity. The base is fixedly connected to the treatment tank.

[0018] With the grid plate placed inside the first treatment tank and the base fixed to the treatment tank, the flocculator is located between the grid plate and the base. The flocculator is located in the middle of the first treatment tank and is spherical. When water flows through the flocculator, it is guided by the spherical curved surface to form a vortex. Part of the water flows into the empty cavity through the second through hole, generating a secondary flow inside the empty cavity. At the same time, it collides with the water flowing in through other second through holes, increasing the probability of particle collision in the water and forming flocs.

[0019] Furthermore, the mechanical coagulation mechanism includes a second motor, a transmission shaft, and a stirring paddle. The second motor is fixedly connected to the treatment tank. The output end of the second motor is fixedly connected to the transmission shaft. The stirring paddle is fixedly connected to the transmission shaft. The treatment tank is provided with a third treatment tank.

[0020] With the second motor fixed to the treatment tank and the output end of the second motor fixed to the transmission shaft, the second motor drives the transmission shaft to rotate, causing the transmission shaft to drive the stirring paddle to rotate, thereby stirring the water in the third treatment tank and mixing it with the coagulant to make the flocs larger.

[0021] Furthermore, the inclined tube is honeycomb-shaped.

[0022] With the honeycomb-shaped inclined tube, the sedimentation tank is divided into multiple small units, thereby increasing the sedimentation area. Through the upward flowing water, the flocs and particulate matter settle under the action of gravity and the inclined tube, thus achieving efficient solid-liquid separation.

[0023] The water treatment method includes the following steps: S1: Inject the raw water into the biological slow filter, and preliminarily treat the water through the biological slow filter media filled in the biological slow filter; S2: Let the water flow through the flocculator to form a vortex. Part of the water flows into the empty tank, and the other incoming water flows collide inside the empty tank, causing the particles in the water to collide, so as to form flocs and further treat the water; S3: Add a coagulant to the water in the third treatment tank, and the second motor drives the stirring paddle to rotate, so that it is mixed with the coagulant to make the flocs larger; S4: Through the honeycomb-shaped inclined tubes in the second treatment tank, the flocs and particulate matters in the upward flowing water are settled under the action of gravity and the inclined tubes, so as to achieve efficient solid-liquid separation; S5: The water production pump can extract the water filtered by the ultrafiltration membrane and form a pressure difference, so that the raw water flows from bottom to top to form a cross-flow filtration. Through the spiral guide vanes, the flowing water and bubbles are made to rotate spirally, so as to form a transverse shear force on the ultrafiltration membrane, wash the pollutants on its surface, reduce the attachment of pollutants, and enable the ultrafiltration membrane to produce excessive clean water in a single filtration cycle; S6: The backwash pump makes the water flow out of the ultrafiltration membrane to clean the pollutants blocked in the filter holes, and the lifting mechanism drives the brush roller to clean the surface of the ultrafiltration membrane.

[0024] Compared with the prior art, the beneficial effects of the present invention are: 1. Through the biological slow filter, grid flocculation mechanism, mechanical coagulation mechanism, inclined tube sedimentation unit and integrated membrane filtration mechanism, each module operates in coordination to form a five-stage water treatment process, improving the efficiency of water treatment and ensuring the stability of treatment.

[0025] 2. By adjusting the spiral guide vanes according to the water flow to control the shear force of the water flow and the aeration bubbles, the attachment of pollutants on the ultrafiltration membrane is reduced, thereby extending the cleaning cycle and increasing the amount of clean water produced in a single filtration cycle.

[0026] 3. Through the spherical flocculator, the water flow forms a vortex. Part of the water flows into the empty tank through the second through hole, and the water flowing in through the empty tank and other second through holes collides, increasing the probability of particle collision in the water, thereby improving the efficiency of floc formation.

[0027] 4. Through the cooperation of the upward flow inclined tube sedimentation tank and the honeycomb-shaped inclined tubes, efficient solid-liquid separation is achieved.

[0028] 5. Through a plurality of plate-type ceramic ultrafiltration membranes to form a cross-flow filtration, the efficiency of water treatment is improved. Description of the Drawings

[0029] Figure 1 It is a schematic structural diagram of the overall invention; Figure 2 It is a schematic structural diagram of the grid flocculation mechanism of the invention; Figure 3 It is a schematic structural diagram of the integrated membrane filtration mechanism of the invention; Figure 4 is Figure 3 a partial enlarged view of A; Figure 5 It is a schematic structural diagram of the air outlet pipe of the invention; Figure 6 is Figure 3 a partial enlarged view of B; Figure 7 It is a schematic structural diagram of the cleaning guiding mechanism of the invention; Figure 8 It is a schematic structural diagram of the adjusting unit of the invention; Figure 9 It is a schematic structural diagram of the guiding unit of the invention; Figure 10 It is a schematic structural diagram of the flocculator of the invention; Figure 11 It is a schematic structural diagram of the inclined tube of the invention.

[0030] In the figure: 1. treatment tank; 11. biological slow filter; 12. first treatment tank; 13. second treatment tank; 14. third treatment tank; 2. support base; 3. grid flocculation mechanism; 31. grid plate; 32. flocculator; 321. empty tank; 322. second through hole; 33. base; 4. mechanical coagulation mechanism; 41. second motor; 42. transmission shaft; 43. stirring paddle; 5. inclined tube; 6. integrated membrane filtration mechanism; 61. fixed seat; 62. ultrafiltration membrane; 63. water collecting pipe; 64. water production pump; 65. backwashing pump; 66. air pump; 67. air outlet pipe; 7. lifting mechanism; 71. first motor; 72. screw; 73. fourth slider; 731. thread groove; 732. second sliding groove; 74. guide rail; 8. cleaning guiding mechanism; 81. intercepting rod; 811. first through hole; 812. arc groove; 813. first sliding groove; 82. guiding unit; 821. guide vane; 822. fixing block; 823. first slider; 824. first return spring; 83. brush roller; 84. baffle; 841. arc surface; 85. second slider; 86. annular spring; 87. guide rod; 88. adjusting unit; 881. third slider; 882. second return spring; 9. sludge discharge pipe. Detailed implementation manners

[0031] Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] Embodiment: As Figures 1-4 shown, the present invention provides a technical solution for a modular multi-stage collaborative water treatment device and method. A modular multi-stage collaborative water treatment device includes a treatment tank 1, a support base 2, a grid flocculation mechanism 3, a mechanical coagulation mechanism 4, inclined tubes 5, an integrated membrane filtration mechanism 6, a lifting mechanism 7, a cleaning and guiding mechanism 8, and a sludge discharge pipe 9. The treatment tank 1 is fixedly connected to the support base 2. The treatment tank 1 is provided with a biological slow filtration tank 11. The treatment tank 1 is provided with a first treatment tank 12. The grid flocculation mechanism 3 is placed in the first treatment tank 12. The mechanical coagulation mechanism 4 is fixedly connected to the treatment tank 1. The treatment tank 1 is provided with a second treatment tank 13. The inclined tubes 5 are placed in the second treatment tank 13. The treatment tank 1 is provided with a third treatment tank 14. The lifting mechanism 7 is fixedly connected to the integrated membrane filtration mechanism 6. There are several cleaning and guiding mechanisms 8. The several cleaning and guiding mechanisms 8 are fixedly connected to the lifting mechanism 7. The sludge discharge pipe 9 is fixedly connected to the treatment tank 1.

[0033] The treatment tank 1 is installed on the support base 2. The bottom of the support base 2 is provided with wheels, which is convenient for the device to move. The treatment tank 1 is provided with a biological slow filtration tank 11. The water is preliminarily treated by filling biological slow filtration fillers in the biological slow filtration tank 11. The preliminarily treated water is further treated by the grid flocculation mechanism 3 in the first treatment tank 12, and then passes through the mechanical coagulation mechanism 4 to mix the coagulation agent and water, thereby removing suspended solids in the water. Then, through the inclined tubes 5 in the second treatment tank 13, the solid particles in the water are settled. Finally, through the integrated membrane filtration mechanism 6, clean water is filtered out. During the filtration, the cleaning and guiding mechanism 8 guides the water flow to generate a spiral, so that the water flow generates a shear force on the filtration membrane, thereby reducing impurities attached to the filtration membrane. At the same time, the cleaning and guiding mechanism 8 can adjust the magnitude of the shear force generated by the water flow in real time according to the water flow to avoid sudden fluctuations in water quality and affect the filtration effect. Through the lifting mechanism 7, the cleaning and guiding mechanism 8 moves up and down to cooperate with the backwashing of the integrated membrane filtration mechanism 6 to clean the filtration membrane, thereby enhancing the cleaning effect of the filtration membrane, reducing the residue of pollutants, thereby extending the cycle of self-cleaning and manual disassembly and cleaning of the device, and thus improving the efficiency of water treatment. Sludge is discharged regularly through the sludge discharge pipe 9.

[0034] Such as Figure 1 , Figure 3 , Figure 5 and Figure 6As shown, the integrated membrane filtration mechanism 6 includes a fixed seat 61, an ultrafiltration membrane 62, a water collecting pipe 63, a water production pump 64, a backwashing pump 65, an air pump 66, and an air outlet pipe 67. There are several ultrafiltration membranes 62. The fixed seat 61 is fixedly connected to the several ultrafiltration membranes 62. The several ultrafiltration membranes 62 are connected to the water collecting pipe 63 through pipes. The water production pump 64 is connected to the water collecting pipe 63 through pipes. The backwashing pump 65 is connected to the water collecting pipe 63 through pipes. There are several air outlet pipes 67. The air pump 66 is connected to the several air outlet pipes 67 through pipes. The several air outlet pipes 67 are placed at the bottom of the ultrafiltration membrane 62.

[0035] Several plate-type ceramic ultrafiltration membranes 62 are fixed through the fixed seat 61. The water production pump 64 is connected to the water collecting pipe 63 through pipes. The water collecting pipe 63 is connected to the several ultrafiltration membranes 62 through pipes, enabling the water production pump 64 to extract the water filtered by the ultrafiltration membrane 62, thereby forming a pressure difference to make the water flow from bottom to top, thus forming cross-flow filtration. The air pump 66 is connected to the air outlet pipes 67 at the bottom of the ultrafiltration membrane 62 through pipes, enabling the air outlet pipes 67 to aerate, thereby generating bubbles. The bubbles rise to scour the filtration membrane, reducing the attachment of impurities to the filtration membrane. When the ultrafiltration membrane 62 needs to be cleaned, the clean water is returned from the water collecting pipe 63 to the ultrafiltration membrane 62 through the backwashing pump 65, making the water flow out from the inside of the ultrafiltration membrane 62 to conduct cleaning.

[0036] As Figure 7 and Figure 8 As shown, the cleaning and guiding mechanism 8 includes an intercepting rod 81, a guiding unit 82, a brush roller 83, a baffle 84, a second slider 85, an annular spring 86, a guiding rod 87, and an adjusting unit 88. The intercepting rod 81 is fixedly connected to the lifting mechanism 7. The intercepting rod 81 is provided with several first through holes 811. There are several guiding units 82. The several guiding units 82 are slidably connected to the first through holes 811. The intercepting rod 81 is provided with an arc-shaped groove 812. The guiding rod 87 is placed in the arc-shaped groove 812. The annular spring 86 is sleeved outside the guiding rod 87. The second slider 85 is slidably connected to the guiding rod 87. The baffle 84 is fixedly connected to the second slider 85. There are four adjusting units 88. There are two brush rollers 83. Both ends of each brush roller 83 are respectively rotatably connected to the adjusting unit 88.

[0037] Through the intercepting rod 81, water flows through several first through-holes 811 on the intercepting rod 81. Through the guiding unit 82, the flowing water and bubbles generate spiral rotation, thereby forming a transverse shear force on the ultrafiltration membrane 62, washing the pollutants on its surface, reducing the deposition of pollutants on the membrane surface, and thus reducing the membrane fouling rate. By setting the baffle 84, the baffle 84 can slide along the arc-shaped groove 812 under the action of the guiding rod 87. When the treated water quality is poor, the filtration speed is slow, and the pressure difference is small, the water only flows through the first through-holes 811 to ensure sufficient flow velocity so that the water flow can generate sufficient shear force. By arranging brush rollers 83 on both sides of the intercepting rod 81, after one or more filtrations are completed, the lifting mechanism 7 is started to move up and down to clean the membrane. The tension of the brush rollers 83 is adjusted by the adjusting unit 88 in cooperation with the sliding baffle 84, thereby ensuring the cleaning effect.

[0038] As Figure 9 shown, the guiding unit 82 includes a guide vane 821, a fixing block 822, a first slider 823, and a first return spring 824. The guide vane 821 and the fixing block 822 are fixedly connected. The fixing block 822 and the first slider 823 are fixedly connected. The intercepting rod 81 is provided with a first sliding groove 813. The first slider 823 is slidably connected to the first sliding groove 813. The first return spring 824 is placed in the first sliding groove 813. The guide vane 821 is spiral, and the pitch of the guide vane 821 gradually increases from bottom to top.

[0039] The guide vane 821 is fixed by the fixing block 822. Both sides of the fixing block 822 are fixed to two first sliders 823. The first return spring 824 placed in the first sliding groove 813 provides a pre-tightening force for it, so that when the water flow increases, the guide vane 821 can slide upward, thereby automatically adjusting according to the water flow. Since the guide vane 821 is spiral and the pitch of the guide vane 821 gradually increases, the number of spiral turns gradually increases from bottom to top, thereby balancing the transverse shear force formed by it and avoiding damage to the membrane caused by excessive shear force.

[0040] As Figure 4 and Figure 6 shown, the lifting mechanism 7 includes a first motor 71, a screw rod 72, a fourth slider 73, and a guide rail 74. The first motor 71 is fixedly connected to the fixed seat 61. The output end of the first motor 71 is fixedly connected to the screw rod 72. There are two fourth sliders 73. The two fourth sliders 73 are fixedly connected to the intercepting rod 81. One fourth slider 73 is provided with a threaded groove 731. The threaded groove 731 cooperates with the screw rod 72. The guide rail 74 is slidably connected to the fourth slider 73.

[0041] The output end of the first motor 71 is fixed to the screw rod 72, enabling the first motor 71 to drive the screw rod 72 to rotate. Two fourth sliders 73 are fixed to the intercepting rod 81 to support the intercepting rod 81. One of the fourth sliders 73 is provided with a threaded groove 731, and the threaded groove 731 cooperates with the screw rod 72, enabling the fourth slider 73 to slide vertically up and down along the guide rail 74.

[0042] As Figure 7 and Figure 8 shown in the figure, the adjusting unit 88 includes a third slider 881 and a second return spring 882. The baffle 84 is provided with an arc surface 841. The third slider 881 is rotatably connected to the brush roller 83. The fourth slider 73 is provided with a second sliding groove 732. The second return spring 882 is placed in the second sliding groove 732, and the third slider 881 is slidably connected to the second sliding groove 732.

[0043] Due to the fourth slider 73 being provided with the second sliding groove 732, the third slider 881 can slide in the second sliding groove 732, enabling the fourth slider 73 to drive the third slider 881 and the brush roller 83 to move up and down to clean the film. When there are more pollutants accumulated on the film and the resistance is greater, when rising, the baffle 84 slides downward and the arc surface 841 contacts the brush roller 83, pushing the brush roller 83 to move, thereby adjusting the cleaning effect of the brush roller 83 on the film. Through the second return spring 882, the brush roller 83 can be reset.

[0044] As Figure 2 and Figure 10 shown in the figure, the grid flocculation mechanism 3 includes a grid plate 31, a flocculator 32, and a base 33. The grid plate 31 is placed in the first treatment tank 12. The flocculator 32 is spherical. The flocculator 32 is provided with an empty slot 321. The flocculator 32 is provided with a second through hole 322, and the second through hole 322 communicates with the empty slot 321. The base 33 is fixedly connected to the treatment tank 1.

[0045] Due to the grid plate 31 being placed in the first treatment tank 12 and the base 33 being fixed to the treatment tank 1, the flocculator 32 is located between the grid plate 31 and the base 33. The flocculator 32 is located in the middle of the first treatment tank 12. The flocculator 32 is spherical. When water flows through the flocculator 32, it is guided by the spherical curved surface to form a vortex. Part of the water flows into the empty slot 321 through the second through hole 322, generating a secondary flow inside the empty slot 321. At the same time, it collides with the water flowing in through other second through holes 322, increasing the probability of particle collision in the water and forming flocs.

[0046] As Figure 2 shown in the figure, the mechanical coagulation mechanism 4 includes a second motor 41, a transmission shaft 42, and a stirring paddle 43. The second motor 41 is fixedly connected to the treatment tank 1. The output end of the second motor 41 is fixedly connected to the transmission shaft 42. The stirring paddle 43 is fixedly connected to the transmission shaft 42. The treatment tank 1 is provided with a third treatment tank 14.

[0047] Through the second motor 41 fixed on the treatment tank 1, the output end of the second motor 41 is fixed to the transmission shaft 42, so that the second motor 41 drives the transmission shaft 42 to rotate, and the transmission shaft 42 drives the stirring paddle 43 to rotate, thereby stirring the water in the third treatment tank 14, mixing it with the flocculant, and making the flocs larger.

[0048] As Figure 11 shown, the inclined tube 5 is honeycomb-shaped.

[0049] Through the honeycomb-shaped inclined tube 5, the sedimentation tank is divided into multiple small units, thereby increasing the sedimentation area. Through the upward flowing water current, the flocs and particulate matter settle under the action of gravity and the inclined tube 5, thereby realizing efficient solid-liquid separation.

[0050] The water treatment method includes the following steps: S1: Inject the raw water into the biological slow sand filter 11, and preliminarily treat the water through the biological slow sand filter media filled in the biological slow sand filter 11; S2: Let the water flow through the flocculator 32 to form a vortex. Part of the water flow flows into the empty tank 321, and collides with other inflowing water flows inside the empty tank 321, causing the particles in the water to collide, thereby forming flocs and further treating the water; S3: Add the flocculant to the water in the third treatment tank 14, and the second motor 41 drives the stirring paddle 43 to rotate, thereby mixing it with the flocculant and making the flocs larger; S4: Through the honeycomb-shaped inclined tube 5 in the second treatment tank 13, the flocs and particulate matter in the upward flowing water current settle under the action of gravity and the inclined tube 5, thereby realizing efficient solid-liquid separation; S5: The water production pump 64 can extract the water filtered by the ultrafiltration membrane 62 and create a pressure difference, so that the raw water flows from bottom to top, thereby forming cross-flow filtration. Through the spiral guide vane 821, the flowing water and bubbles generate spiral rotation, thereby forming a transverse shear force on the ultrafiltration membrane 62 and flushing the pollutants on its surface, reducing the attachment of pollutants, and enabling the ultrafiltration membrane 62 to produce excessive clean water in a single filtration cycle; S6: Make the water flow out of the ultrafiltration membrane 62 through the backwash pump 65, thereby cleaning the pollutants blocked in the filter holes, and the lifting mechanism 7 drives the brush roller 83 to clean the surface of the ultrafiltration membrane 62.

[0051] Working principle: Raw water is injected into the biological slow sand filter 11. The water is preliminarily treated by the biological slow sand filter media filled in the biological slow sand filter 11. The preliminarily treated water flows into the first treatment tank 12. Through the flocculator 32, impurities in the water form flocs, and then flow into the third treatment tank 14. The stirring paddle 43 is driven to rotate by the second motor 41 to mix the water and the coagulant, making the flocs grow larger. The water flows in from below the second treatment tank 13, causing the water to flow upward, so that the flocs and particulate matters in the water settle to the bottom of the second treatment tank 13 under the action of gravity and the inclined tube 5. The water pump 64 can extract the water filtered by the ultrafiltration membrane 62 and create a pressure difference, thereby causing the raw water to flow from bottom to top, forming a cross-flow filtration. The air pump 66 delivers gas to the air outlet pipe 67 at the bottom of the ultrafiltration membrane 62 for aeration to generate bubbles. At the same time, through the spiral guide vane 821 that automatically adjusts according to the water flow, the water flow and the bubbles generate a spiral rotation, thereby forming a transverse shear force on the ultrafiltration membrane 62 to scour the pollutants on its surface, reducing the deposition of pollutants on the membrane surface, scouring the filter membrane, and reducing the attachment of impurities to the filter membrane. When the ultrafiltration membrane 62 needs to be cleaned, the backwash pump 65 is used to make clean water return to the ultrafiltration membrane 62 from the collecting pipe 63, causing the water to flow out from the inside of the ultrafiltration membrane 62. The lifting mechanism 7 drives the brush roller 83 to brush the surface of the ultrafiltration membrane 62, thereby cleaning the ultrafiltration membrane 62.

[0052] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A modular multi - stage collaborative water treatment device, characterized in that: The water treatment device includes a treatment tank (1), a support base (2), a grid flocculation mechanism (3), a mechanical coagulation mechanism (4), inclined tubes (5), an integrated membrane filtration mechanism (6), a lifting mechanism (7), a cleaning and guiding mechanism (8), and a sludge discharge pipe (9). The treatment tank (1) is fixedly connected to the support base (2). The treatment tank (1) is provided with a biological slow sand filter (11). The treatment tank (1) is provided with a first treatment tank (12). The grid flocculation mechanism (3) is placed in the first treatment tank (12). The mechanical coagulation mechanism (4) is fixedly connected to the treatment tank (1). The treatment tank (1) is provided with a second treatment tank (13). The inclined tubes (5) are placed in the second treatment tank (13). The treatment tank (1) is provided with a third treatment tank (14). The lifting mechanism (7) is fixedly connected to the integrated membrane filtration mechanism (6). There are several cleaning and guiding mechanisms (8), and several cleaning and guiding mechanisms (8) are fixedly connected to the lifting mechanism (7). The sludge discharge pipe (9) is fixedly connected to the treatment tank (1).

2. The modular multi - level collaborative water treatment device according to claim 1, wherein: The integrated membrane filtration mechanism (6) includes a fixed seat (61), ultrafiltration membranes (62), a water collecting pipe (63), a water production pump (64), a backwash pump (65), an air pump (66), and an air outlet pipe (67). There are several ultrafiltration membranes (62). The fixed seat (61) is fixedly connected to several ultrafiltration membranes (62). Several ultrafiltration membranes (62) are connected to the water collecting pipe (63) through pipelines. The water production pump (64) is connected to the water collecting pipe (63) through a pipeline. The backwash pump (65) is connected to the water collecting pipe (63) through a pipeline. There are several air outlet pipes (67). The air pump (66) is connected to several air outlet pipes (67) through pipelines. Several air outlet pipes (67) are placed at the bottom of the ultrafiltration membranes (62).

3. The modular multi-level collaborative water treatment device according to claim 2, wherein: The cleaning and guiding mechanism (8) includes an interception rod (81), a guiding unit (82), a brush roller (83), a baffle (84), a second slider (85), a ring spring (86), a guiding rod (87), and an adjusting unit (88). The interception rod (81) is fixedly connected to the lifting mechanism (7). The interception rod (81) is provided with several first through holes (811). There are several guiding units (82), and several guiding units (82) are slidably connected to the first through holes (811). The interception rod (81) is provided with an arc-shaped groove (812). The guiding rod (87) is placed in the arc-shaped groove (812). The ring spring (86) is sleeved outside the guiding rod (87). The second slider (85) is slidably connected to the guiding rod (87). The baffle (84) is fixedly connected to the second slider (85). There are four adjusting units (88). There are two brush rollers (83), and both ends of each brush roller (83) are rotatably connected to the adjusting unit (88).

4. The modular multi - level collaborative water treatment device according to claim 3, wherein: The guiding unit (82) includes a diversion piece (821), a fixing block (822), a first slider (823) and a first return spring (824). The diversion piece (821) is fixedly connected to the fixing block (822), the fixing block (822) is fixedly connected to the first slider (823). The intercepting rod (81) is provided with a first sliding groove (813), the first slider (823) is slidably connected to the first sliding groove (813), the first return spring (824) is placed in the first sliding groove (813), the diversion piece (821) is spiral, and the pitch of the diversion piece (821) gradually increases from bottom to top.

5. The modular multi - level collaborative water treatment device according to claim 4, wherein: The lifting mechanism (7) includes a first motor (71), a screw rod (72), a fourth slider (73) and a guide rail (74). The first motor (71) is fixedly connected to the fixed seat (61), the output end of the first motor (71) is fixedly connected to the screw rod (72). There are two fourth sliders (73), and the two fourth sliders (73) are fixedly connected to the intercepting rod (81). One of the fourth sliders (73) is provided with a threaded groove (731), the threaded groove (731) cooperates with the screw rod (72), and the guide rail (74) is slidably connected to the fourth slider (73).

6. The modular multi - level collaborative water treatment device according to claim 5, wherein: The adjusting unit (88) includes a third slider (881) and a second return spring (882). The baffle (84) is provided with an arc surface (841), the third slider (881) is rotatably connected to the brush roller (83), the fourth slider (73) is provided with a second sliding groove (732), the second return spring (882) is placed in the second sliding groove (732), and the third slider (881) is slidably connected to the second sliding groove (732).

7. The modular multi - stage collaborative water treatment device according to claim 6, wherein: The grid flocculation mechanism (3) includes a grid plate (31), a flocculator (32) and a base (33). The grid plate (31) is placed in the first treatment tank (12), the flocculator (32) is spherical, the flocculator (32) is provided with an empty groove (321), the flocculator (32) is provided with a second through hole (322), the second through hole (322) is communicated with the empty groove (321), and the base (33) is fixedly connected to the treatment tank (1).

8. A modular multi-level collaborative water treatment device according to claim 7, characterized in that: The mechanical coagulation mechanism (4) includes a second motor (41), a transmission shaft (42) and a stirring paddle (43). The second motor (41) is fixedly connected to the treatment tank (1), the output end of the second motor (41) is fixedly connected to the transmission shaft (42), the stirring paddle (43) is fixedly connected to the transmission shaft (42), and the treatment tank (1) is provided with a third treatment tank (14).

9. The modular multi - level collaborative water treatment device according to claim 8, wherein: The inclined tube (5) is honeycomb-shaped.

10. A modular multi - level collaborative water treatment method, characterized in that: Using a modular multi-stage collaborative water treatment device as described in any one of claims 1-9, the water treatment method includes the following steps: S1: Inject raw water into the biological slow sand filter (11) to pre-treat the water; S2: The grid flocculation mechanism (3) further treats the water; S3: By adding a coagulant to the water, the mechanical coagulation mechanism (4) mixes the water and the coagulant; S4: Make the flocs in the water settle through the inclined tube (5) of the second treatment tank (13); S5: The integrated membrane filtration mechanism (6) filters out the purified water. At the same time, the water flow is adjusted through the cleaning guiding mechanism (8) so that the integrated membrane filtration mechanism (6) can produce more purified water in a single filtration cycle; S6: The ultrafiltration membrane (62) is cleaned by the backwash pump (65) of the integrated membrane filtration mechanism (6) and the lifting mechanism (7) in cooperation with the brush roller (83).

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