Raw water multi-medium filtering device

Abstract

The invention relates to the technical field of wastewater treatment, and discloses a raw water multi-medium filtering device which comprises a filtering tank, an adjusting mechanism arranged outside the filtering tank, a water conveying mechanism arranged in the filtering tank and used for supplying water and draining water, and a plurality of groups of medium boxes sliding in the filtering tank, the adjusting mechanism comprises an alternate adjusting assembly used for alternately adjusting the medium box and a rotary adjusting assembly used for rotationally adjusting the medium box, the medium box comprises a coal sand filtering box and an adsorption filtering box, and through the arranged adjusting mechanism, a plurality of filtering elements with the characteristic of mutual arrangement are arranged, so that flexible adjustment and control are achieved; the coal sand filter boxes or the adsorption filter boxes which are mutually arranged can be alternately adjusted through the adjustment of the alternate adjusting assembly, and the coal sand filter boxes or the adsorption filter boxes can be rotationally adjusted through the adjustment of the rotary adjusting assembly, so that a medium can be backwashed or replaced in the operation process.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and particularly to a raw water multi-media filtration device. Background Art

[0002] In the current field of water purification treatment, the requirements for water quality are increasing day by day. Traditional single-media filtration devices have problems such as limited filtration capacity and inability to comprehensively remove complex pollutants in water. In order to more efficiently remove suspended solids, colloids, organic matter, and some heavy metals in raw water, a raw water multi-media filtration device with multiple filter elements arranged in a mutually arranged manner has emerged. Through the reasonable combination and arrangement of different filter elements, it can give full play to the advantages of each medium, achieve more refined and comprehensive water quality purification, and meet the water use requirements in multiple scenarios.

[0003] In the patent with the publication number CN115738538A, a filtration device is disclosed, which includes a cylinder body. Inside the cylinder body, a condensate receiving part, a primary filtration part, and a secondary gas-liquid separation part are sequentially arranged from bottom to top. A gas inlet is arranged on the side of the primary filtration part, and an eccentric primary filter mesh block assembly is arranged inside. A gas outlet is arranged on the side of the secondary gas-liquid separation part, and a secondary gas-liquid separation component is arranged inside. The lower part of the secondary gas-liquid separation part has a condensate outflow hole, and a condensate downpipe is arranged at the lower part of the primary filtration part. The lower end of the condensate downpipe is located inside the condensate receiving part. Using the above filtration device before a vacuum pump can prevent quartz sand particles and moisture from entering the vacuum pump, avoid the situation where the vacuum pump impeller gets stuck, resulting in a decrease in vacuum pumping efficiency or failure, enable the vacuum pump to operate efficiently and reliably, and improve the quality of the crucible and production stability.

[0004] The prior art has the following defects: It is impossible to backwash or replace the medium during operation: The concentration of impurities such as suspended solids, colloids, and oils in the wastewater is relatively high, and it is easy to accumulate on the surface or in the pores of the filter medium, resulting in medium blockage. If the medium is not backwashed or replaced in time, the filtration efficiency will decrease significantly, the water quality of the effluent will deteriorate, the removal rates of suspended solids and pollutants will decrease, and even system failures will occur, affecting the overall wastewater treatment effect. Regular replacement or shutdown for backwashing will affect continuous operation, resulting in a decrease in wastewater treatment efficiency and production interruption. Therefore, a structure for backwashing or replacing the medium during operation needs to be set up to timely remove the blockage in the medium, improve the water quality of the effluent, optimize the equipment performance, reduce the operation cost, and achieve the effect of long-term and efficient operation of the system.

[0005] It is impossible to separate the spaces for wastewater filtration, medium backwashing, and medium replacement: Most existing filter tanks are integrated. While filtering wastewater, the medium is periodically backwashed and replaced. However, the interference between different processes affects the overall operational smoothness, resulting in low operation efficiency. Moreover, when backwashing or replacing the medium, sewage may directly enter the filtration system, leading to unstable effluent water quality and reducing the reliability and economy of the system. Therefore, it is necessary to partition multiple cavities in the filter tank to prevent sewage from mixing in during backwashing or medium replacement, ensure the filtration effect, and achieve the effects of improving the reliability, economy, and sustainability of the system. Summary of the Invention

[0006] In view of the problems in the prior art that it is impossible to backwash or replace the medium during operation and impossible to separate the spaces for wastewater filtration, medium backwashing, and medium replacement, a raw water multi-media filtration device is proposed.

[0007] This application provides a raw water multi-media filtration device, and its purpose is: through the provided adjustment mechanism, the medium can be backwashed or replaced during operation, the blockages in the medium can be removed in time, the effluent water quality can be improved, the equipment performance can be optimized, the operation cost can be reduced, and the effect of enabling the system to operate efficiently in the long term can be achieved. Through the provided cavities and water conveyance mechanism, sewage is prevented from mixing in during backwashing or medium replacement, the filtration effect is ensured, and the effects of improving the reliability, economy, and sustainability of the system are achieved.

[0008] The technical solution of the present invention is: A raw water multi-media filtration device includes a filter tank, an adjustment mechanism arranged outside the filter tank, a water conveyance mechanism arranged inside the filter tank for water supply and drainage, and multiple groups of medium boxes slidable inside the filter tank, and is characterized in that: the adjustment mechanism includes an alternating adjustment component for alternately adjusting the medium boxes and a rotational adjustment component for rotationally adjusting the medium boxes, and the medium boxes include a coal sand filtration box and an adsorption filtration box; The alternating adjustment component includes an alternating adjustment outer shell and a rotating shaft seat fixedly connected to the outer wall of the filter tank. A first adjustment motor is fixedly connected to the outer wall of the alternating adjustment outer shell. A driving bevel gear is sleeved on the output shaft of the first adjustment motor. Two rotating shafts are rotatably connected between the outer wall of the rotating shaft seat and the inner wall of the alternating adjustment outer shell. Two driven bevel gears arranged oppositely are fixedly connected to the outer walls of the two rotating shafts, and both of the two driven bevel gears are meshed with the driving bevel gear; The alternating adjustment component further includes two arc gears respectively fixedly connected to the outer walls of the two coal sand filtration boxes, and two adjustment gears are also fixedly connected to the outer walls of the two rotating shafts. The two arc gears are respectively meshed with the two adjustment gears.

[0009] With the above solution, by means of the alternately adjusting component provided, when adjustment is needed, the first adjusting motor is operated or the first adjusting handwheel is manually controlled to rotate the driving bevel gear, and the two arc-shaped gears are driven to slide towards each other through the oppositely arranged driven bevel gear, rotating shaft and adjusting gear, so as to alternately adjust the coal-sand filter box or the adsorption filter box.

[0010] Furthermore, the rotation adjustment component includes a rotation adjustment housing fixedly connected to the outer wall of the filter tank, and two arc-shaped worm wheels fixedly connected to the outer walls of the coal-sand filter box and the adsorption filter box. A second adjusting motor is fixedly connected to the outer wall of the rotation adjustment housing, and a worm is sleeved on the output shaft of the second adjusting motor, and the worm meshes with one of the arc-shaped worm wheels.

[0011] Furthermore, a second adjusting handwheel is arranged outside one end of the rotation adjustment housing away from the second adjusting motor, and the second adjusting handwheel is used to adjust the worm meshing with the other arc-shaped worm wheel.

[0012] With the above solution, by means of the rotation adjustment component provided, when the rotation adjustment component is adjusted, the second adjusting motor is operated or the second adjusting handwheel is manually controlled to rotate the corresponding worm, and drive the arc-shaped worm wheel to rotate, so as to rotate and adjust the coal-sand filter box or the adsorption filter box.

[0013] Furthermore, a partition is fixedly connected to the inner wall of the filter tank, and the interior of the filter tank is divided into cavities of the same size by the partition. The cavities include a first filter cavity, a second filter cavity, a medium replacement cavity and a medium backwashing cavity that are adjacent to each other in sequence.

[0014] Furthermore, the first adjusting handwheel and the second adjusting handwheel are used to adjust the medium box into the medium replacement cavity, and the first adjusting motor and the second adjusting motor are used to adjust the medium box into the medium backwashing cavity.

[0015] With the above solution, through the multiple cavities provided, after the anthracite and quartz sand in the coal-sand filter box are filtered for a period of time and need to be backwashed, the coal-sand filter box doped with impurities can be adjusted to the medium backwashing cavity for backwashing treatment through the alternately adjusting component and the rotation adjustment component, and at the same time, the treated coal-sand filter box is adjusted to the first filter cavity and the second filter cavity to continuously filter sewage. Similarly, the modified medium and activated carbon in the adsorption filter box are adjusted to the medium replacement cavity for replacement.

[0016] Furthermore, the water delivery mechanism includes a water delivery circulation component for providing wastewater and discharging purified water, a backwashing component for providing backwashing water flow and discharging sewage, and a hollow cavity opened inside the filter tank.

[0017] Further, the water conveyance and circulation assembly includes a plurality of polymerization plates and a plurality of lower drainage and diversion plates fixedly connected to the inner wall of the filtration tank. The plurality of polymerization plates and the plurality of lower drainage and diversion plates are respectively arranged outside a plurality of medium boxes. The uppermost polymerization plate is communicated with a waste water discharge pipe, and the lowermost polymerization plate is communicated with a purified water discharge pipe. A middle section lifting pipe is installed inside the hollow cavity, and the middle section lifting pipe communicates two adjacent polymerization plates in the first filtration cavity and the second filtration cavity.

[0018] With the above solution, through the provided water conveyance and circulation assembly, the waste water is discharged into the anthracite filtration box at the uppermost part of the filtration tank through the waste water discharge pipe, the polymerization plates and the lower drainage and diversion plates. The anthracite filtration box is filled with anthracite, which can intercept larger particle suspended matters and reduce the load of the lower layer of media. Then, it is discharged into the first adsorption filtration box through the lower drainage and diversion plates. The adsorption filtration box is filled with modified media, which can remove specific pollutants such as ammonia nitrogen and phosphate. Then, it flows into the middle section lifting pipe through the polymerization plates. The middle section lifting pipe lifts the waste water to a certain height, and then it is discharged into the second anthracite filtration box through the polymerization plates and the lower drainage and diversion plates. The anthracite filtration box is filled with quartz sand, which can intercept medium particle suspended matters and further purify the water quality. Finally, it is discharged into the lowermost adsorption filtration box. The adsorption filtration box is filled with activated carbon, which can adsorb dissolved pollutants such as organic matters, heavy metals and residual chlorine, and finally is discharged through the purified water discharge pipe.

[0019] Further, the backwashing assembly includes upper drainage and diversion plates respectively arranged at the bottoms of a plurality of anthracite filtration boxes. The plurality of upper drainage and diversion plates are all communicated with diversion branch pipes. One ends of the plurality of diversion branch pipes far away from the upper drainage and diversion plates are communicated with a flushing main pipe, and the flushing main pipe is arranged outside the filtration tank.

[0020] Further, the backwashing assembly further includes a plurality of sewage leakage openings opened on the partition plate. The plurality of sewage leakage openings are used for discharging the sewage of the backwashing into the hollow cavity, and the bottom of the hollow cavity is communicated with a sewage discharge pipe.

[0021] With the above solution, through the provided backwashing assembly, during the backwashing of the media, the flushing water flow carries air flow and is discharged into the upper drainage and diversion plates through the flushing main pipe and the diversion branch pipes, and the anthracite filtration boxes doped with impurities are subjected to air-water combined backwashing. The flushed sewage enters the hollow cavity through the sewage leakage openings and is then discharged through the sewage discharge pipe.

[0022] Further, a maintenance door is hinged to the outer wall of the filtration tank. The maintenance door is arranged outside the medium replacement cavity, and the maintenance door is used for replacing the adsorption blocks in the adsorption filtration box.

[0023] With the above solution, through the provided maintenance door, during the medium replacement, the maintenance door is opened, and the medium in the adsorption filtration box with saturated adsorption can be replaced.

[0024] Advantages of the present invention: Through the provided adjustment mechanism, multiple filter elements arranged in a mutually arranged manner can be flexibly regulated. When the alternating adjustment assembly is adjusted, the first adjustment motor is operated or the first adjustment handwheel is manually controlled to rotate the driving bevel gear, and through the oppositely arranged driven bevel gear, rotating shaft and adjustment gear, the two arc gears are driven to slide towards each other, realizing the alternating adjustment of the mutually arranged coal-sand filter box or adsorption filter box. When the rotating adjustment assembly is adjusted, the second adjustment motor is operated or the second adjustment handwheel is manually controlled to rotate the corresponding worm, and drive the arc worm gear to rotate, thereby rotating and adjusting the coal-sand filter box or adsorption filter box. Thus, the medium can be backwashed or replaced during operation, the blockages in the medium can be removed in a timely manner, the water quality of the effluent can be improved, the performance of the equipment can be optimized, the operating cost can be reduced, and the long-term and efficient operation of the system can be achieved.

[0025] Through the provided cavity and water delivery mechanism, multiple filter elements arranged in a mutually arranged manner in the device can function orderly. After the anthracite and quartz sand in the coal-sand filter box have been filtering for a period of time, backwashing is required. The coal-sand filter box doped with impurities can be adjusted to the medium backwashing chamber for backwashing treatment through the alternating adjustment assembly and the rotating adjustment assembly, and at the same time, the treated coal-sand filter box is adjusted to the first filter chamber and the second filter chamber to continuously filter sewage. Similarly, the modified medium and activated carbon in the adsorption filter box are adjusted to the medium replacement chamber for replacement. Thus, the mixing of sewage during backwashing or medium replacement can be avoided, the filtering effect can be ensured, and the reliability, economy and sustainability of the system can be improved. Description of the Drawings

[0026] Figure 1 It is a schematic diagram of the overall structure of the filter tank of the present invention; Figure 2 It is a schematic diagram of the top structure of the filter tank of the present invention; Figure 3 It is a schematic diagram of the structure at the adjustment mechanism of the present invention; Figure 4 It is a schematic diagram of the structure at the alternating adjustment assembly of the present invention; Figure 5 It is a schematic diagram of the structure at the rotating shaft seat of the present invention; Figure 6 It is a schematic diagram of the structure at the rotating adjustment assembly of the present invention; Figure 7 It is a schematic diagram of the structure of the worm of the present invention; Figure 8 It is a schematic diagram of the structures of the coal-sand filter box and the adsorption filter box of the present invention; Figure 9 It is a schematic diagram of the structure at the water delivery mechanism of the present invention; Figure 10Schematic structural diagram of the water conveyance and circulation component of the present invention; Figure 11 Schematic structural diagram of the backwashing component of the present invention; Figure 12 Schematic structural diagram of the polymerizing plate, lower row shunt plate and upper row shunt plate of the present invention.

[0027] In the figure: 1. Filter tank; 11. Partition board; 12. First filtration chamber; 13. Second filtration chamber; 14. Medium replacement chamber; 15. Medium backwashing chamber; 2. Maintenance door; 3. Adjusting mechanism; 31. Alternating adjustment component; 311. Alternating adjustment housing; 312. First adjustment motor; 313. First adjustment handwheel; 314. Arc-shaped gear; 315. Rotating shaft; 316. Adjusting gear; 317. Driven bevel gear; 318. Rotating shaft seat; 319. Driving bevel gear; 32. Rotating adjustment component; 321. Rotating adjustment housing; 322. Second adjustment motor; 323. Second adjustment handwheel; 324. Arc-shaped worm gear; 325. Worm; 33. Coal sand filter box; 34. Adsorption filter box; 4. Water conveyance mechanism; 41. Water conveyance and circulation component; 411. Waste water discharge pipe; 412. Polymerizing plate; 413. Lower row shunt plate; 414. Middle section lifting pipe; 415. Clean water discharge pipe; 42. Backwashing component; 421. Flushing main pipe; 422. Shunt branch pipe; 423. Upper row shunt plate; 424. Sewage leakage port; 425. Sewage discharge pipe; 43. Hollow cavity. Specific embodiments

[0028] To make the above objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings of the specification.

[0029] Refer to Figure 1 - Figure 12 A raw water multi-media filtration device is provided, including a filter tank 1, an adjusting mechanism 3 arranged outside the filter tank 1, a water conveyance mechanism 4 arranged inside the filter tank 1 for water supply and drainage, and multiple groups of medium boxes slidable inside the filter tank 1. The adjusting mechanism 3 includes an alternating adjustment component 31 for alternately adjusting the medium boxes and a rotating adjustment component 32 for rotating and adjusting the medium boxes. The medium boxes include a coal sand filter box 33 and an adsorption filter box 34.

[0030] Refer to Figure 3 - Figure 5, the alternating adjustment assembly 31 includes an alternating adjustment housing 311 fixedly connected to the outer wall of the filter tank 1 and a rotating shaft seat 318. A first adjustment motor 312 is fixedly connected to the outer wall of the alternating adjustment housing 311. A driving bevel gear 319 is sleeved on the output shaft of the first adjustment motor 312. Two rotating shafts 315 are rotatably connected between the outer wall of the rotating shaft seat 318 and the inner wall of the alternating adjustment housing 311. Two driven bevel gears 317 arranged oppositely are fixedly connected to the outer walls of the two rotating shafts 315. Both of the two driven bevel gears 317 are meshed with the driving bevel gear 319. The alternating adjustment assembly 31 further includes two arc gears 314 respectively fixedly connected to the outer walls of the two coal and sand filter boxes 33. Two adjustment gears 316 are also fixedly connected to the outer walls of the two rotating shafts 315. The two arc gears 314 are respectively meshed with the two adjustment gears 316.

[0031] Specifically, two alternating adjustment assemblies 31 are provided. The upper alternating adjustment assembly 31 is used to alternately adjust the two coal and sand filter boxes 33, and the lower alternating adjustment assembly 31 is used to alternately adjust the two adsorption filter boxes 34. One rotating adjustment assembly 32 is provided to respectively control the two coal and sand filter boxes 33 and the two adsorption filter boxes 34 on the same horizontal line. When the driving bevel gear 319 rotates, since the two driven bevel gears 317 are arranged oppositely, the two rotating shafts 315 can be rotated in opposite directions, and further the two arc gears 314 move in opposite directions. Thus, the two coal and sand filter boxes 33 or the two adsorption filter boxes 34 can be alternately adjusted.

[0032] By providing the alternating adjustment assembly 31, when adjustment is required, the first adjustment motor 312 is operated or the first adjustment handwheel 313 is manually controlled to make the driving bevel gear 319 rotate, and the two arc gears 314 are driven to slide in opposite directions through the oppositely arranged driven bevel gears 317, rotating shafts 315 and adjustment gears 316, so as to alternately adjust the coal and sand filter box 33 or the adsorption filter box 34.

[0033] Refer to Figure 6 - Figure 7 , the rotating adjustment assembly 32 includes a rotating adjustment housing 321 fixedly connected to the outer wall of the filter tank 1, and two arc worm wheels 324 fixedly connected to the outer walls of the coal and sand filter box 33 and the adsorption filter box 34. A second adjustment motor 322 is fixedly connected to the outer wall of the rotating adjustment housing 321. A worm 325 is sleeved on the output shaft of the second adjustment motor 322. The worm 325 is meshed with one of the arc worm wheels 324. A second adjustment handwheel 323 is arranged outside one end of the rotating adjustment housing 321 away from the second adjustment motor 322. The second adjustment handwheel 323 is used to adjust the worm 325 meshed with the other arc worm wheel 324.

[0034] Specifically, an arc-shaped worm gear 324 corresponds to a worm 325. The two worms 325 are respectively adjusted by a second adjustment motor 322 and a second adjustment handwheel 323. The second adjustment motor 322 adjusts the two coal sand filter boxes 33 on the same horizontal line, and the second adjustment handwheel 323 adjusts the two adsorption filter boxes 34 on the same horizontal line.

[0035] By means of the rotation adjustment assembly 32 provided, when the rotation adjustment assembly 32 is adjusted, the second adjustment motor 322 is operated or the second adjustment handwheel 323 is manually controlled to rotate the corresponding worm 325, and drive the arc-shaped worm gear 324 to rotate, so as to play the role of rotating and adjusting the coal sand filter box 33 or the adsorption filter box 34.

[0036] Refer to Figure 2 - Figure 7 , a partition 11 is fixedly connected to the inner wall of the filter tank 1. The interior of the filter tank 1 is divided into cavities of the same size by the partition 11. The cavities include a first filter cavity 12, a second filter cavity 13, a medium replacement cavity 14, and a medium backwashing cavity 15 that are adjacent to each other in sequence. The first adjustment handwheel 313 and the second adjustment handwheel 323 are used to adjust the medium box into the medium replacement cavity 14, and the first adjustment motor 312 and the second adjustment motor 322 are used to adjust the medium box into the medium backwashing cavity 15.

[0037] Specifically, there is a coal sand filter box 33 and an adsorption filter box 34 in the first filter cavity 12. The coal sand filter box 33 corresponding to it alternately is in the medium backwashing cavity 15, and the adsorption filter box 34 corresponding to it rotationally is in the medium replacement cavity 14; there is also a coal sand filter box 33 and an adsorption filter box 34 in the second filter cavity 13, but the coal sand filter box 33 corresponding to it rotationally is in the medium backwashing cavity 15, and the adsorption filter box 34 corresponding to it alternately is in the medium replacement cavity 14.

[0038] Through the multiple cavities provided, after the anthracite and quartz sand in the coal sand filter box 33 are filtered for a period of time, backwashing is required. The coal sand filter box 33 doped with impurities can be adjusted to the medium backwashing cavity 15 for backwashing treatment by the alternating adjustment assembly 31 and the rotation adjustment assembly 32. At the same time, the treated coal sand filter box 33 is adjusted to the first filter cavity 12 and the second filter cavity 13 to continuously filter sewage. Similarly, the modified medium and activated carbon in the adsorption filter box 34 are adjusted to the medium replacement cavity 14 for replacement.

[0039] Refer to Figure 4 , the water conveyance mechanism 4 includes a water conveyance and circulation assembly 41 for providing wastewater and discharging purified water, a backwashing assembly 42 for providing backwashing water flow and discharging sewage, and a hollow cavity 43 opened inside the filter tank 1.

[0040] Refer toFigure 9 - Figure 10 The water delivery and circulation component 41 includes a plurality of polymer plates 412 fixedly connected to the inner wall of the filter tank 1 and a plurality of lower drainage shunt plates 413. The plurality of polymer plates 412 and the plurality of lower drainage shunt plates 413 are respectively arranged outside a plurality of media boxes. The uppermost polymer plate 412 is communicated with a waste water discharge pipe 411, and the lowermost polymer plate 412 is communicated with a purified water discharge pipe 415. A middle section lifting pipe 414 is installed inside the hollow cavity 43, and the middle section lifting pipe 414 communicates two adjacent polymer plates 412 in the first filtration cavity 12 and the second filtration cavity 13.

[0041] Through the arranged water delivery and circulation component 41, the waste water is discharged into the anthracite filtration box 33 at the uppermost part of the filter tank 1 through the waste water discharge pipe 411, the polymer plates 412 and the lower drainage shunt plates 413. The anthracite filtration box 33 is filled with anthracite, which can intercept larger particle suspended matters and reduce the load of the lower layer of media. Then it is discharged into the first adsorption filtration box 34 through the lower drainage shunt plates 413. The adsorption filtration box 34 is provided with a modified medium, which can remove specific pollutants such as ammonia nitrogen and phosphate. Then it flows into the middle section lifting pipe 414 through the polymer plates 412. The middle section lifting pipe 414 lifts the waste water to a certain height, and then it is discharged into the second anthracite filtration box 33 through the polymer plates 412 and the lower drainage shunt plates 413. The anthracite filtration box 33 is filled with quartz sand, which can intercept medium particle suspended matters and further purify the water quality. Finally, it is discharged into the lowermost adsorption filtration box 34. The adsorption filtration box 34 is provided with activated carbon, which can adsorb dissolved pollutants such as organic matters, heavy metals and residual chlorine, and finally is discharged through the purified water discharge pipe 415.

[0042] Refer to Figure 11 - Figure 12 The backwashing component 42 includes upper drainage shunt plates 423 respectively arranged at the bottoms of a plurality of anthracite filtration boxes 33. A plurality of shunt branch pipes 422 are communicated with the upper drainage shunt plates 423. One ends of the plurality of shunt branch pipes 422 far away from the upper drainage shunt plates 423 are communicated with a flushing main pipe 421. The flushing main pipe 421 is arranged outside the filter tank 1. The backwashing component 42 further includes a plurality of sewage leakage openings 424 opened on the partition plate 11. The plurality of sewage leakage openings 424 are used for discharging the backwashed sewage into the hollow cavity 43, and the bottom of the hollow cavity 43 is communicated with a sewage discharge pipe 425.

[0043] Through the arranged backwashing component 42, during the medium backwashing, the flushing water flow carries air flow and is discharged into the upper drainage shunt plates 423 through the flushing main pipe 421 and the shunt branch pipes 422, and the anthracite filtration box 33 doped with impurities is subjected to air-water combined backwashing. The backwashed sewage enters the hollow cavity 43 through the sewage leakage openings 424 and is then discharged through the sewage discharge pipe 425.

[0044] Refer to Figure 1, a maintenance door 2 is hinged to the outer wall of the filtration tank 1. The maintenance door 2 is arranged outside the medium replacement chamber 14 and is used for replacing the adsorption block in the adsorption filter box 34.

[0045] By providing the maintenance door 2, when replacing the medium, open the maintenance door 2, and the adsorption filter box 34 with saturated adsorption can be replaced with the medium.

[0046] During use, the wastewater is discharged into the anthracite filter box 33 at the top of the filtration tank 1 through the wastewater discharge pipe 411, the polymerization plate 412 and the lower discharge diverter plate 413. The anthracite filter box 33 is filled with anthracite, which can intercept larger particulate suspended matters and reduce the load of the lower layer of medium. Then it is discharged into the first adsorption filter box 34 through the lower discharge diverter plate 413. The adsorption filter box 34 contains a modified medium, which can remove specific pollutants such as ammonia nitrogen and phosphate. Then it flows into the middle section lifting pipe 414 through the polymerization plate 412. The middle section lifting pipe 414 lifts the wastewater to a certain height, and then it is discharged into the second anthracite filter box 33 through the polymerization plate 412 and the lower discharge diverter plate 413. The anthracite filter box 33 is filled with quartz sand, which can intercept medium particulate suspended matters and further purify the water quality. Finally, it is discharged into the adsorption filter box 34 at the bottom. The adsorption filter box 34 contains activated carbon, which can adsorb dissolved pollutants such as organic matters, heavy metals and residual chlorine, and is finally discharged through the purified water discharge pipe 415. After filtering for a period of time, the anthracite and quartz sand in the anthracite filter box 33 need to be backwashed. The anthracite filter box 33 doped with impurities can be adjusted to the medium backwashing chamber 15 for backwashing treatment by alternately adjusting the component 31 and the rotating adjustment component 32. At the same time, the treated anthracite filter box 33 is adjusted to the first filtration chamber 12 and the second filtration chamber 13 to continuously filter the sewage. Similarly, the modified medium and activated carbon in the adsorption filter box 34 are adjusted to the medium replacement chamber 14 for replacement.

[0047] The working principle of the present invention: During operation, the wastewater is discharged into the anthracite filter box 33 at the top of the filtration tank 1 through the wastewater discharge pipe 411, the polymerization plate 412 and the lower discharge diverter plate 413. The anthracite filter box 33 is filled with anthracite, which can intercept larger particulate suspended matters and reduce the load of the lower layer of medium. Then it is discharged into the first adsorption filter box 34 through the lower discharge diverter plate 413. The adsorption filter box 34 contains a modified medium, which can remove specific pollutants such as ammonia nitrogen and phosphate.

[0048] Then, it flows into the middle lifting pipe 414 through the polymerization plate 412. The middle lifting pipe 414 raises the height of the wastewater, and then discharges it into the second coal sand filter box 33 through the polymerization plate 412 and the lower drainage shunt plate 413. Quartz sand is filled in this coal sand filter box 33, which can intercept medium-sized particulate suspensions and further purify the water quality. Finally, it is discharged into the adsorption filter box 34 at the bottom. Activated carbon is placed in this adsorption filter box 34, which can adsorb soluble pollutants such as organic matter, heavy metals, and residual chlorine, and finally is discharged through the purified water discharge pipe 415.

[0049] After the anthracite and quartz sand in the coal sand filter box 33 have been filtering for a period of time, backwashing is required. The coal sand filter box 33 doped with impurities can be adjusted to the medium backwashing chamber 15 through the alternating adjustment component 31 and the rotating adjustment component 32 for backwashing treatment. At the same time, the treated coal sand filter box 33 is adjusted to the first filtration chamber 12 and the second filtration chamber 13 to continuously filter sewage. Similarly, the modified medium and activated carbon in the adsorption filter box 34 are adjusted to the medium replacement chamber 14 for replacement.

[0050] When the alternating adjustment component 31 is adjusted, the first adjustment motor 312 is operated or the first adjustment handwheel 313 is manually controlled to make the driving bevel gear 319 rotate, and drive the two arc gears 314 to slide towards each other through the oppositely arranged driven bevel gear 317, rotating shaft 315, and adjustment gear 316, so as to alternately adjust the coal sand filter box 33 or the adsorption filter box 34.

[0051] When the rotating adjustment component 32 is adjusted, the second adjustment motor 322 is operated or the second adjustment handwheel 323 is manually controlled to make the corresponding worm 325 rotate, and drive the arc-shaped worm gear 324 to rotate, so as to rotate and adjust the coal sand filter box 33 or the adsorption filter box 34.

[0052] During medium backwashing, the washing water flow carries air flow and discharges it into the upper drainage shunt plate 423 through the washing main pipe 421 and the shunt branch pipe 422 to perform air-water combined backwashing on the coal sand filter box 33 doped with impurities. The sewage flushed out enters the hollow cavity 43 through the sewage leak 424 and is then discharged through the sewage discharge pipe 425.

[0053] During medium replacement, the maintenance door 2 is opened, and the adsorption filter box 34 with saturated adsorption can be replaced with medium.

[0054] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not restrictive. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A raw water multi-media filtration device, comprising a filtration tank, an adjustment mechanism arranged outside the filtration tank, a water conveyance mechanism arranged inside the filtration tank for water supply and drainage, and multiple groups of media boxes sliding inside the filtration tank, characterized in that: The adjusting mechanism includes an alternating adjustment component for alternately adjusting the media cartridge and a rotational adjustment component for rotationally adjusting the media cartridge. The media cartridge includes a coal-sand filter cartridge and an adsorption filter cartridge. A partition is fixedly connected to the inner wall of the filter tank. The interior of the filter tank is divided into cavities of the same size by the partition. The cavities include a first filter cavity, a second filter cavity, a media replacement cavity, and a media backwashing cavity that are adjacent to each other in sequence.

2. The raw water multi-media filtration device according to claim 1, wherein: The alternating adjustment component includes an alternating adjustment outer shell and a rotating shaft seat fixedly connected to the outer wall of the filter tank. A first adjustment motor is fixedly connected to the outer wall of the alternating adjustment outer shell. A driving bevel gear is sleeved on the output shaft of the first adjustment motor. Two rotating shafts are rotatably connected between the outer wall of the rotating shaft seat and the inner wall of the alternating adjustment outer shell. Two driven bevel gears arranged oppositely are fixedly connected to the outer walls of the two rotating shafts. Both of the two driven bevel gears are meshed with the driving bevel gear.

3. The raw water multi-media filtration device according to claim 2, characterized in that: The alternating adjustment component further includes two arc gears fixedly connected to the outer walls of the two coal-sand filter cartridges respectively. Two adjustment gears are also fixedly connected to the outer walls of the two rotating shafts. The two arc gears are respectively meshed with the two adjustment gears.

4. The raw water multi-media filtration device according to claim 3, wherein: The rotational adjustment component includes a rotational adjustment outer shell fixedly connected to the outer wall of the filter tank, and two arc worm wheels fixedly connected to the outer walls of the coal-sand filter cartridge and the adsorption filter cartridge respectively. A second adjustment motor is fixedly connected to the outer wall of the rotational adjustment outer shell. A worm is sleeved on the output shaft of the second adjustment motor. The worm is meshed with one of the arc worm wheels. A second adjustment handwheel is arranged outside one end of the rotational adjustment outer shell away from the second adjustment motor. The second adjustment handwheel is used to adjust the worm meshed with the other arc worm wheel.

5. The raw water multi-media filtration device according to claim 4, characterized in that: The first adjustment handwheel and the second adjustment handwheel are used to adjust the media cartridge into the media replacement cavity. The first adjustment motor and the second adjustment motor are used to adjust the media cartridge into the media backwashing cavity.

6. The raw water multi-media filtration device according to claim 1, characterized in that: The water delivery mechanism includes a water delivery circulation component for providing wastewater and discharging purified water, a backwashing component for providing backwashing water flow and discharging sewage, and a hollow cavity opened inside the filter tank.

7. The raw water multi-media filtration device according to claim 6, characterized in that: The water delivery circulation component includes a plurality of polymerization plates and a plurality of lower row shunt plates fixedly connected to the inner wall of the filter tank. The plurality of polymerization plates and the plurality of lower row shunt plates are respectively arranged outside the plurality of media cartridges. The uppermost polymerization plate is communicated with a wastewater inlet pipe. The lowermost polymerization plate is communicated with a purified water discharge pipe. A middle section lifting pipe is installed inside the hollow cavity. The middle section lifting pipe is communicated with two adjacent polymerization plates in the first filter cavity and the second filter cavity.

8. The raw water multi-media filtration device according to claim 6, characterized in that: The backwashing component includes upper row shunt plates respectively arranged at the bottoms of the plurality of coal-sand filter cartridges. A shunt branch pipe is communicated with each of the plurality of upper row shunt plates. A washing main pipe is communicated between the ends of the plurality of shunt branch pipes away from the upper row shunt plates. The washing main pipe is arranged outside the filter tank.

9. The raw water multi-media filtration device according to claim 8, characterized in that: The backwashing component further includes a plurality of sewage leakage openings opened on the partition. The plurality of sewage leakage openings are used to discharge the backwashed sewage into the hollow cavity. A sewage discharge pipe is communicated with the bottom of the hollow cavity.

10. The raw water multi-media filtration device according to claim 1, wherein: An inspection door is hinged to the outer wall of the filter tank. The inspection door is arranged outside the medium replacement chamber and is used for replacing the adsorption block in the filter cartridge.

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