A filter tank with a shared filter material cleaning device

Abstract

The present invention discloses a filter tank with a shared filter material cleaning device, comprising a plurality of tank bodies arranged in parallel, each tank body being provided with a plurality of filter material air lifting pipelines distributed in rows and columns, the filter material air lifting pipelines being divided into at least two rows; at least one set of tracks being laid above the tank bodies, the tracks being located in the middle of the two rows of filter material air lifting pipelines, and the filter material cleaning device being placed on the tracks; a power assembly being provided on the filter material cleaning device, driving the filter material cleaning device to move along the tracks above the tank bodies at the same level; a discharge reversing valve being provided at the discharge end of the filter material cleaning device, the discharge reversing valve being connected to two discharge troughs, and the discharge troughs being respectively oriented to the filter material air lifting pipelines on both sides of the tracks. The present invention arranges a plurality of filter material air lifting pipelines inside the filter tank, so that the filter material flows evenly, and at the same time can reduce the inclination angle of the bottom of the filter tank, increase the thickness of the filter layer, and improve the utilization rate of the filter material; the filter tanks at the same level can share a set of filter material cleaning devices, reduce the idle rate of the equipment, and reduce the cost.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment equipment, and in particular relates to a filter tank with a common filter material cleaning device. Background Art

[0002] The mobile sand filter and mobile activated carbon adsorption filter currently used in the water treatment industry have single-stage, two-stage or multi-stage modes according to the different concentrations of pollutants that need to be removed. The purpose of the multi-stage setting is to increase the total height of the filter layer and increase the time of the treated sewage to improve the treatment effect. When the amount of water to be treated is large, it is necessary to use a method of parallel operation of multiple tanks at each level. These filter tanks are independent of each other and have their own pipelines and filter material cleaning devices. The filter material cleaning device often has idle time. Each filter tank is equipped with a filter material cleaning device, which makes the equipment investment cost high and the utilization rate low.

[0003] At the same time, in order to increase the sewage treatment capacity, the area of ​​a single filter tank needs to be increased, and in order for the filter material to flow smoothly downward, the cone bucket at the bottom of the tank needs to be designed to be steeper, which also leads to a large ineffective height of the filter tank (taking a 5m×5m tank as an example, the height of the cone bucket is about 3.25 meters). In order to ensure the treatment effect, the height of the filter tank needs to be increased, which will greatly increase the construction cost. Due to the large area of ​​the filter tank, only the lifting point is set at the center, which easily forms a situation where only the center discharges the material, and a dead corner is formed around it. After a long period of time, the filter material around it will be completely blocked by dirt and lose its processing capacity.

[0004] The filter media cleaning device has only one drop point. When the pool area is large, the top of the filter media layer is likely to form a shape with a high middle and low periphery. The low periphery shortens the time for water to pass through the filter media layer, that is, the treatment is not sufficient, affecting the treatment effect. At this time, a scraping device needs to be added, making the cleaning device structure complicated. The cleaning when adding new filter media and the daily cleaning of filter media in the pool have different requirements for the cleaning output of the filter media cleaning device. The current filter media cleaning devices cannot meet the demand for variable cleaning output. Summary of the invention

[0005] The purpose of the present invention is to solve the above problems and to provide a filter tank with a common filter material cleaning device which has a simple structure, saves costs and allows the filter material to flow evenly.

[0006] To this end, the technical solution of the present invention is: a filter tank with a shared filter material cleaning device, comprising a plurality of tank bodies arranged in parallel, characterized in that: a plurality of filter material air lifting pipelines distributed in rows and columns are arranged in each tank body, and the filter material air lifting pipelines are divided into at least two rows; at least one set of tracks is laid above the tank body, the track is located in the middle of the two rows of filter material air lifting pipelines, and the filter material cleaning device is placed on the track; the filter material cleaning device is provided with a power assembly, which drives the filter material cleaning device to move along the track above the tank body of the same level; the discharge end of the filter material cleaning device is provided with a discharge reversing valve, and the discharge reversing valve is connected to two discharge troughs, and the discharge troughs are respectively facing the filter material air lifting pipelines on both sides of the track.

[0007] Furthermore, the feed end of the filter material cleaning device is provided with two feed ports, and a lifting component is provided below the feed port to drive the feed port to rise and fall; when the filter material cleaning device moves along the track, the feed port is in a low position, and when the filter material cleaning device moves to the working position, the feed port rises to be connected with the filter material air lifting pipeline.

[0008] Furthermore, the filter material cleaning device also includes a cylindrical first screen and a second screen, the first screen and the second screen are coaxially arranged, and the two screens are internally connected, the first screen is connected to the feed port, and the second screen is connected to the discharge reversing valve.

[0009] Furthermore, the lower parts of the first screen and the second screen are placed in a water trough, and material pushing spirals are fixed in the first screen and the second screen. A driving component is also provided to drive the first screen and the second screen to roll, and the first screen and the second screen roll in their respective water troughs, and the internal material pushing spirals rotate synchronously.

[0010] Furthermore, the filter material air lifting pipeline is composed of a discharge pipe, an air lifting device, a feed pipe and an air inlet valve. The discharge pipe and the feed pipe are respectively located at the upper and lower ends of the air lifting device, and the air lifting device is connected to the air inlet valve through the air inlet pipe; a protective sleeve is provided on the outside of the filter material air lifting pipeline, and a water inlet valve is provided above the protective sleeve. The water inlet valve is connected to the discharge protective sleeve through a pipeline; a pressure-bearing protective cover is provided below the protective sleeve.

[0011] Furthermore, the pressure-bearing protective cover is a trumpet-shaped structure with an opening facing downward. The pressure-bearing protective cover is divided into two layers, an inner layer and an outer layer. The inner layer is fixed to the outside of the protective sleeve, and a water distributor is arranged on the outer layer. The water distributor includes a number of evenly distributed water distribution arms; the water distributor is connected to the water inlet pipe through the water flow channel between the inner and outer layers of the pressure-bearing protective cover.

[0012] Furthermore, the filter material air lifting pipelines on the same side of the track are grouped in pairs, and a drop pipe is arranged between the two filter material air lifting pipelines in each group; the drop pipe is an eight-shaped structure, and the two outlets are respectively facing the filter material air lifting pipelines on both sides.

[0013] Furthermore, a plurality of position sensing blocks are provided on both sides of the track, and a sensing switch is provided on the filter material cleaning device, and the two work in coordination.

[0014] The present invention sets a plurality of filter material air lifting pipelines inside the filter tank, and the material can be extracted for cleaning at multiple positions, so that the filter material layer flows downward more evenly, with almost no dead corners, which greatly improves the utilization rate of the filter material; at the same time, the cone bucket height required inside the filter tank can be reduced, and the effective use height of the filter tank can be increased. The filter material air lifting pipelines are arranged into at least two rows, a track is laid in the middle, and a movable filter material cleaning device is placed on the track, so that the filter material cleaning device can reciprocate in each filter material air lifting pipeline, and the discharge position is switched by the discharge reversing valve, and the filter material air lifting pipelines on both sides of the track are respectively connected to clean the lifted filter material. The filter tanks of the same level connected in parallel can share the filter material cleaning device, and the number of the filter material cleaning devices is determined according to the number of rows of the filter material air lifting pipelines, and every two rows are equipped with a set of guide rails and filter material cleaning devices.

[0015] Position sensing blocks are provided on both sides of the track. The filter material cleaning device cooperates with the position sensing blocks through the induction switch, moves to the position where the discharge pipe of the filter material airlift pipeline is opposite to one of the feed ports of the filter material cleaning device, and then starts the filter material cleaning work. The filter material airlift pipeline is divided into two rows, and the filter material cleaning device is located in the middle. By switching the discharge position through the discharge reversing valve, the filter material airlift pipelines on both sides can be taken into account, reducing the staying position of the filter material cleaning device.

[0016] A position for adding new filter material is set between every two filter material air lifting pipelines, and an eight-shaped drop pipe is placed. New filter material for this filter tank is added from the next-level filter tank or the outside through a pipeline and is dropped into the filter material cleaning device. When adding, the new filter material is controlled by the discharge reversing valve to fall into the drop pipe on the left or right side. After being evenly divided by the two outlets of the drop pipe, the new filter material falls above the position of each filter material air lifting pipeline.

[0017] The filter media air lift pipeline is equipped with a protective sleeve, which makes it easy to remove the filter media air lift pipeline for repair and maintenance without cleaning the filter tank. After the filter media air lift pipeline is installed in the tank, the pipeline is shorter, with fewer turns, and is not prone to wear and perforation. Even if the pipeline is worn and leaks, the leaked filter media will fall back into the filter tank and no major production accidents will occur.

[0018] A pressure-bearing protective cover is provided under each filter media airlift pipeline, which can prevent the filter media at the inlet of the filter media airlift pipeline from being compressed too densely and difficult to flow; there are also multiple water distribution arms on the pressure-bearing protective cover, which are radially arranged to form a water distributor. The water distributor is connected to the water inlet pipe, and the water flows from under the water distribution arm. The water distribution arm opens a space in the filter media layer so that the water can flow out freely. After passing through the water distributor, the water flows upward through the filter media layer, and the pollutants in the water are gradually intercepted or adsorbed, and the water gradually becomes clean, and finally flows out from the top water outlet weir to the next level filter tank for further treatment or to the next treatment process.

[0019] The present invention arranges a plurality of filter material air lifting pipelines inside the filter tank, so that the filter material (quartz sand, activated carbon) can flow evenly, and at the same time can reduce the inclination angle of the bottom of the filter tank, increase the thickness of the filter layer, and improve the utilization rate of the filter material; the filter tanks of the same level can share a set of filter material cleaning devices, reduce the idle rate of equipment, and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings.

[0021] Figure 1 It is the structural diagram of the filter tank;

[0022] Figure 2 It is a lateral cross-sectional view of the primary filter tank and the secondary filter tank;

[0023] Figure 3 for Figure 2 A partial enlarged view of

[0024] Figure 4 for Figure 2 AA section view;

[0025] Figure 5 for Figure 2 BB cross-sectional view;

[0026] Figure 6 for Figure 2 CC section view;

[0027] Figure 7 for Figure 2 DD cross-sectional view;

[0028] Figure 8 It is a structural schematic diagram of a filter material cleaning device;

[0029] Fig. 9 It is a side schematic diagram of the filter material cleaning device;

[0030] Fig.10 This is a schematic diagram of the structure of the filter material air lift pipeline.

[0031] The markings in the figure are: primary filter 1, primary feeding pipe 11, primary discharge pipeline 12, water outlet weir 13, discharge point protection cover 14, secondary filter 2, secondary discharge pipeline 21, secondary water inlet pipe 22, filter material layer 3, filter material air lift pipeline 4, discharge pipe 41, air lift device 42, feed pipe 43, protective sleeve 44, pressure protection cover 45, water distributor 46, primary water inlet pipe 47, material drop receiving trough 48, air inlet valve 49, water inlet valve 50, track 5, guardrail 51, position Induction block 52, filter material cleaning device 6, driving wheel 61, induction switch 62, discharge trough 63, feed port 64, lifting push rod 65, discharge reversing valve 66, first screen 67, second screen 68, first water trough 69, second water trough 70, sewage trough 71, aeration motor 72, power motor 77, control cabinet 78, operation cabinet 79, flushing water pump 80, flushing pump water inlet pipe 81, elevator 82, flexible section of water inlet pipe and its drag chain 83, sewage pipeline 84, drop pipe 9. DETAILED DESCRIPTION

[0032] See the attached drawings. This embodiment takes a two-stage filter as an example. The primary filter 1 and the secondary filter 2 each include 5 pool bodies arranged in parallel. According to the size of the pool body, an appropriate number of filter material airlift pipelines 4 are arranged in each pool body. For example, in a 5m×5m pool, 4 filter material airlift pipelines 4 can be arranged in the pool. The pool bottom has an inclined surface of about 1 meter high, and the 4 filter material airlift pipelines are arranged in two rows; 20 filter material airlift pipelines are arranged on the primary filter and the secondary filter, 10 in a row, divided into two rows. A set of tracks 5 is laid above the primary filter and the secondary filter, and the tracks are located in the middle of the two rows of filter material airlift pipelines. The primary filter and the secondary filter each include a set of filter material cleaning devices 6, which are placed on the tracks. The filter material cleaning devices 6 are provided with drive wheels 61 and a power motor 77 that drives the drive wheels to rotate, driving the filter material cleaning devices 6 to move along the tracks 5 above the primary pool body or the secondary pool body.

[0033] A guardrail 51 is provided above the track 5, and the filter material airlift pipelines 4 are arranged in two rows, with 10 in each row. Two discharge troughs 63 and two feed ports 64 are provided on the filter material cleaning device, so that the filter material airlift pipelines on both sides of the track can be cleaned and fed. Ten position sensing blocks 52 are provided on the guardrail 51, and a sensing switch 62 is provided on the filter material cleaning device 6. When the two work together, the discharge pipe 41 of the filter material airlift pipeline 4 is connected to the feed port 64, and the filter material cleaning work can start.

[0034] The positions of the 10 filter media air lift pipelines 4 are recorded as air lift points, and the air lift points are grouped in pairs. A feeding point is set between each group of two air lift points, that is, from left to right on the filter tank, it can be set as air lift point A1, feeding point B1, air lift point A2, air lift point A3, feeding point B2, air lift point A4, air lift point A5, feeding point B3, air lift point A6, air lift point A7, feeding point B4, air lift point A8, air lift point A9, feeding point B5, and air lift point A10. Each feeding point is provided with a drop pipe 9, which is an eight-shaped structure, and the two outlets are respectively facing the filter media air lift pipelines (air lift points) on both sides. The discharge trough is aligned with the drop pipe of the feeding point, and the new filter media of the filter tank is added from the next filter tank or the outside through the pipeline, and evenly distributed above the two air lift points to complete the work of adding new filter media.

[0035] The feed end of the filter material cleaning device 6 is provided with two feed ports 64, and a lifting push rod 65 is provided below the feed port to drive the feed port to rise and fall; the filter material cleaning device 6 moves along the track 5, and when it is in the non-working position, the feed port is in a low position. When the filter material cleaning device moves to the working position, the feed port 64 rises to connect with the discharge pipe 41 of the filter material air lift pipeline. The discharge end of the filter material cleaning device is provided with a discharge reversing valve 66, which is connected to the two discharge troughs 63, and a swinging baffle is provided inside the discharge reversing valve, which switches the two discharge troughs on and off through the baffle; the two discharge troughs are respectively facing the filter material air lift pipelines 4 on both sides of the track 5, and the filter material air lift pipelines 4 are provided with a drop guide groove 48 to facilitate the drop of the filter material.

[0036] The frame of the filter material cleaning device 6 is provided with a cylindrical first screen 67 and a second screen 68, the first screen and the second screen are coaxially arranged, and the two screens are internally connected; the first screen 67 is connected to the feed port 64, and the second screen 68 is connected to the discharge reversing valve 66; the lower parts of the first screen and the second screen are placed in a water tank, a first water tank 69 is provided below the first screen 67, and a second water tank 70 is provided below the second screen 68, the first water tank is connected to the second water tank, and the second water tank is higher than the first water tank; the first screen and the second screen are both fixed with material advancing spirals, and a plurality of scooping plates are fixed on the material advancing spirals, which are sheet-like structures and are evenly inserted on the circumference of the material advancing spirals. A drain port is provided on the first water tank 69, which is connected to the sewage pipeline 84 through the sewage tank 71; an aeration motor 72 is provided below the filter material cleaning device 6, and the fine filter material screened by the first and second screens will be deposited at the bottom of the water tank, and needs to be aerated and stirred up and then discharged with the water flow.

[0037] A circle of nozzles is provided inside the second screen, and a flushing water pump 80 is provided below the second screen. The flushing water pump directly draws water from the top of the filter tank through the flushing pump water inlet pipe 81, and is connected to the nozzle inside the second screen through a pipeline. The sewage brought from the first screen into the filter material is cleaned by the supernatant of the filter tank, and the waste water generated by the cleaning is collected by the second water tank and flows into the first water tank as the washing water for the filter material at the first screen. The flushing pump water inlet pipe 81 is connected to the flushing water pump 80 through a flexible section of the water inlet pipe and its drag chain 83. The flushing pump water inlet pipe 81 is also provided with a lift 82 to drive it up and down. When the filter material cleaning device 6 moves, the flushing pump water inlet pipe 81 is raised and separated from the filter tank to avoid interfering with the movement of the filter material cleaning device 6.

[0038] The filter material cleaning device 6 also includes a driving assembly that drives the first screen 67 and the second screen 68 to roll, so that the first screen and the second screen roll in their respective water tanks, and the internal material push spirals rotate synchronously. The driving assembly includes a motor 73 installed on the frame, the motor is located on the side of the first screen, a driving gear is fixed on the motor, and a driven gear 74 is provided on the side of the first screen 67, and the driving gear and the driven gear are meshed; the first screen 67 is provided with a first rolling ring 75 at one end, and the other end is connected to the second screen through a second rolling ring, and two sets of supporting wheels 76 are provided on the frame, and the first screen and the second screen are mounted on the supporting wheels of the frame through the rolling rings.

[0039] The filter material cleaning device is also provided with a control cabinet 78 and an operating cabinet 79. The control cabinet 78 contains various functional modules, which can be manually operated on the operating cabinet to control the movement and cleaning of the filter material cleaning device. The entire cleaning process can also be remotely controlled manually or fully automatically through wireless communication, and the control mode can be set.

[0040] The filter material air lift pipeline 4 is composed of a discharge pipe 41, an air lift device 42, a feed pipe 43 and an air inlet valve 49. The discharge pipe 41 and the feed pipe 43 are respectively located at the upper and lower ends of the air lift device 42, and the air lift device is connected to the air inlet valve 49 through an air inlet pipe. A protective sleeve 44 is provided on the outside of the filter material air lift pipeline, and a water inlet valve 50 is provided above the protective sleeve. The water inlet valve is connected to the discharge protective sleeve through a pipeline. A pressure-bearing protective cover 45 is provided below the protective sleeve.

[0041] When the pneumatic conveying pipeline needs to be repaired, first open the water inlet valve to make the water level in the protective sleeve higher than the water level or material position of the external solid material accumulation layer, then slowly lift the pneumatic conveying pipeline, and at the same time, the water inlet valve continues to let in water. During the lifting process, it is necessary to ensure that the water level in the protective sleeve is always higher than the outside, and to ensure that the pressure is high inside and low outside. After the pneumatic conveying pipeline is removed, the water inlet valve stops letting in water, and the inside and outside of the protective sleeve are connected, and the water level is the same; the flow of solid materials is caused by the flow of water, so as long as the water level in the pipe is not lower than the outside, the material will not or will enter the pipe in very small amounts, as long as it is not higher than the tapered pipe joint. After the pneumatic conveying pipeline is repaired, it can be directly hoisted back into the protective sleeve by the original route.

[0042] The pressure-bearing protective cover 45 is a trumpet-shaped structure with an opening facing downward. The pressure-bearing protective cover is divided into two layers, an inner layer and an outer layer. The inner layer is fixed to the outside of the protective sleeve, and a water distributor 46 is arranged on the outer layer. The water distributor includes a plurality of evenly distributed water distribution arms. The water distributor 46 is connected to a primary water inlet pipe 47 through a water flow channel between the inner and outer layers of the pressure-bearing protective cover.

[0043] When the filter material of the filter tank is activated carbon, it has two functions: adsorption and filtration. After a certain period of use, the activated carbon will reach a saturated state of adsorption. At this time, it is necessary to discharge the activated carbon filter material out of the tank, which is the waste discharge operation. When there are multiple levels of filter tanks, only the first-level filter tank has a waste discharge operation. The waste discharged from the next-level tank is discharged to the previous level and is the "new material" of the previous level. For example, the waste discharged from the secondary filter tank 2 is discharged into the filter material cleaning device of the first-level filter tank 1 through the secondary discharge pipeline 21 and the first-level feeding pipe 11. After cleaning, it is discharged above each gas lift point.

[0044] A waste discharge point is set in the middle of every four air lift points of the primary filter tank 1, and a discharge point protection cover 14 is provided above the waste discharge point to discharge the bottom waste in the tank out of the tank through the primary discharge pipeline 12 by air lift. When multiple tanks are connected in parallel, the primary discharge pipelines after leaving the filter tank are combined into one pipeline and then transported to the waste collection position.

[0045] During sewage treatment, the incoming water enters the water inlet mains of each pool through the water distribution channel, and is then distributed to each pool body of the primary filter 1, and enters the four water distributors 46 in the pool through the primary water inlet pipe 47, and is distributed through the radially distributed water distribution arms; after passing through the water distributor 46, the water flows upward through the filter material layer 3, and the pollutants in the water are gradually intercepted or adsorbed, and the water gradually becomes clean, and finally flows out from the top outlet weir 13, passes through the secondary water inlet pipe 22, and goes to the secondary filter 2 for further treatment.

Claims

1. A filter tank with a common filter material cleaning device, comprising a plurality of tank bodies arranged in parallel, characterized in that: A plurality of filter material air lifting pipelines distributed in rows and columns are arranged in each tank body, and the filter material air lifting pipelines are divided into at least two rows; at least one set of tracks is laid above the tank body, and the tracks are located in the middle of the two rows of filter material air lifting pipelines, and the filter material cleaning device is placed on the tracks; the filter material cleaning device is provided with a power component to drive the filter material cleaning device to move along the tracks above the tank body at the same level; the discharge end of the filter material cleaning device is provided with a discharge reversing valve, and the discharge reversing valve is connected to two discharge troughs, and the discharge troughs are respectively facing the filter material air lifting pipelines on both sides of the track; The feed end of the filter material cleaning device is provided with two feed ports, and a lifting assembly for driving the feed ports to rise and fall is provided below the feed ports; when the filter material cleaning device moves along the track, the feed ports are in a low position, and when the filter material cleaning device moves to the working position, the feed ports rise to be connected with the filter material air lift pipeline; The filter material cleaning device also includes a cylindrical first screen and a second screen, the first screen and the second screen are coaxially arranged, and the two screens are internally connected, the first screen is connected to the feed inlet, and the second screen is connected to the discharge reversing valve; A plurality of position sensing blocks are arranged on both sides of the track, and a sensing switch is arranged on the filter material cleaning device, and the two work in coordination.

2. A filter tank with a common filter material cleaning device as claimed in claim 1, characterized in that: The lower parts of the first screen and the second screen are placed in a water tank, and material pushing spirals are fixed in the first screen and the second screen. A driving component is also provided to drive the first screen and the second screen to roll. The first screen and the second screen roll in their respective water tanks, and the internal material pushing spirals rotate synchronously.

3. A filter tank with a common filter material cleaning device as claimed in claim 1, characterized in that: The filter material air lifting pipeline is composed of a discharge pipe, an air lifting device, a feed pipe and an air inlet valve. The discharge pipe and the feed pipe are respectively located at the upper and lower ends of the air lifting device, and the air lifting device is connected to the air inlet valve through the air inlet pipe. A protective sleeve is provided on the outside of the filter material air lifting pipeline, and a water inlet valve is provided above the protective sleeve. The water inlet valve is connected to the discharge protective sleeve through a pipeline. A pressure-bearing protective cover is provided below the protective sleeve.

4. A filter tank with a common filter material cleaning device as claimed in claim 3, characterized in that: The pressure-bearing protective cover is a trumpet-shaped structure with an opening facing downward. The pressure-bearing protective cover is divided into two layers, an inner layer and an outer layer. The inner layer is fixed to the outside of the protective sleeve, and a water distributor is arranged on the outer layer. The water distributor includes a plurality of evenly distributed water distribution arms. The water distributor is connected to the water inlet pipe through the water flow channel between the inner and outer layers of the pressure-bearing protective cover.

5. The filter tank of the common filter material cleaning device according to claim 1, characterized in that: The filter material air lifting pipelines on the same side of the track are grouped in pairs, and a drop pipe is arranged between the two filter material air lifting pipelines in each group; the drop pipe is an eight-shaped structure, and the two outlets are respectively directed to the filter material air lifting pipelines on both sides.

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